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- Trim Custom Property values when possible (#393)
- Fixed removing unit for zero-length dimentions in `min()`, `max()` and `clamp()` functions (#426)
- Fixed crash on bad value in TRBL declaration value (#412)

## 4.1.1 (November 15, 2020)

- Fixed build setup to exclude full `mdn/data` that reduced the lib size:
    * dist/csso.js: 794.5Kb -> 255.2Kb
    * dist/csso.min.js: 394.4Kb -> 194.2Kb
    * package size: 237.8 kB -> 156.1 kB
    * package unpacked size: 1.3 MB -> 586.8 kB

## 4.1.0 (October 27, 2020)

- Bumped [CSSTree](https://github.com/csstree/csstree) to `^1.0.0`
- Fixed wrongly merging of TRBL values when one of them contains `var()` (#420)
- Fixed wrongly merging of pseudo class and element with the same name, e.g. `:-ms-input-placeholder` and `::-ms-input-placeholder` (#383, #416)
- Fixed wrongly merging of `overflow` fallback (#415)

## 4.0.3 (March 24, 2020)

- Prevented percent sign removal in `flex`/`-ms-flex` (#410)
- Fixed restructuring optimisation in some cases (@charlessuh & @chsuh, #358, #411)
- Bumped dependencies (@AviVahl, #409)

## 4.0.2 (October 28, 2019)

- Fixed clean stage to avoid exceptions when source has unparsed or bad parts (#380)
- Fixed wrong percentage sign removal for zero values (#395)

## 4.0.1 (October 22, 2019)

- Bumped CSSTree to [`1.0.0-alpha.37`](https://github.com/csstree/csstree/releases/tag/v1.0.0-alpha.37) to avoid source map generation inconsistency across Node.js versions

## 4.0.0 (October 21, 2019)

- Dropped support for Node.js < 8
- Refreshed dev dependencies and scripts
- Bumped [CSSTree](https://github.com/csstree/csstree) to `1.0.0-alpha.36` (#399)
- Changed bundle files: `dist/csso.js` and `dist/csso.min.js` instead single `dist/csso-browser.js` (min version)
- Expose `compress()` as `syntax.compress()`

## 3.5.1 (June 7, 2018)

- Bumped [CSSTree](https://github.com/csstree/csstree) to `1.0.0-alpha.29` (fixes some issues)

## 3.5.0 (January 14, 2018)

- Migrated to [CSSTree](https://github.com/csstree/csstree) `1.0.0-alpha.27`

## 3.4.0 (November 3, 2017)

- Added percent sign removal for zero percentages for some properties that is safe (@RubaXa, #286)
- Removed unit removal for zero values in `-ms-flex` due it breaks flex in IE10/11 (#362)
- Improved performance of selectors comparison (@smelukov, #343)

## 3.3.1 (October 17, 2017)

- Fixed merge of `position` declarations when `sticky` fallback is using (@gruzzilkin, #356)

## 3.3.0 (October 12, 2017)

- Migrated to [CSSTree](https://github.com/csstree/csstree) `1.0.0-alpha25`
    - Changed AST format (see [CSSTree change log](https://github.com/csstree/csstree/blob/master/HISTORY.md) for details)
    - Fixed performance issue when generate CSS with source map (quadratic increase in time depending on the size of the CSS)

## 3.2.0 (September 10, 2017)

- Fixed named color compression to apply only when an identifier is guaranteed to be a color
- Added lifting of `@keyframes` to the beginning of style sheet (chunk), but after `@charset` and `@import` rules
- Added removal of `@keyframes`, `@media` and `@supports` with no prelude
- Added removal of duplicate `@keyframes` (#202)
- Added new option `forceMediaMerge` to force media rules merging. It's unsafe in general, but works fine in many cases. Use it on your own risk (#350)
- Bumped `CSSTree` to `1.0.0-alpha23`

## 3.1.1 (April 25, 2017)

- Fixed crash on a number processing when it used not in a list (#335)

## 3.1.0 (April 24, 2017)

- Implemented optimisation for `none` keyword in `border` and `outline` properties (@zoobestik, #41)
- Implemented replacing `rgba(x, x, x, 0)` to `transparent`
- Fixed plus sign omitting for numbers following identifier, hex color, number or unicode range, since it can change the meaning of CSS (e.g. `calc(1px+2px)` has been optimized to `calc(1px2px)` before, now it stays the same)
- Improved usage filtering for nested selectors (i.e. for `:nth-*()`, `:has()`, `:matches` and other pseudos)
- Implemented `blacklist` filtering in usage (#334, see [Black list filtering](https://github.com/css/csso#black-list-filtering))
- Improved white space removing, now white spaces are removing in the beginning and at the ending of sequences, and between stylesheet and block nodes
- Bumped `CSSTree` to `1.0.0-alpha19`

## 3.0.1 (March 14, 2017)

- Fixed declaration merging when declaration contains an `!important`

## 3.0.0 (March 13, 2017)

- Migrated to [CSSTree](https://github.com/csstree/csstree) as AST backend and exposed its API behind `syntax` property
- Extracted CLI into standalone package [css/csso-cli](https://github.com/css/csso-cli)

## 2.3.1 (January 6, 2017)

- Added `\0` IE hack support (#320)

## 2.3.0 (October 25, 2016)

- Added `beforeCompress` and `afterCompress` options support (#316)
- Fixed crash on empty argument in function (#317)

## 2.2.1 (July 25, 2016)

- Fixed shorthand optimisation issue when value has a color value or something unknown (#311)
- Fixed `cursor` broken fallback (#306)

## 2.2.0 (June 23, 2016)

- Implement AST cloning by adding `clone()` [function](https://github.com/css/csso#cloneast) and `clone` [option](https://github.com/css/csso#compressast-options) for `compress()` function (#296)
- Fix parse and translate attribute selector with flags but w/o operator (i.e. `[attrName i]`)
- Don't merge rules with flagged attribute selectors with others (#291)
- Take in account functions when merge TRBL-properties (#297, thanks to @ArturAralin)
- Improve partial merge (#304)
- Tweak scanner, reduce code deoptimizations and other small improvements

## 2.1.1 (May 11, 2016)

- Fix wrong declaration with `\9` hack merge (#295)

## 2.1.0 (May 8, 2016)

- New option `comments` to specify what comments to left: `exclamation`, `first-exclamation` and `none`
- Add `offset` to CSS parse error details
- Fix token `offset` computation

## 2.0.0 (April 5, 2016)

- No more `gonzales` AST format and related code
- `minify()` and `minifyBlock()` is always return an object as result now (i.e. `{ css: String, map: SourceMapGenerator or null }`)
- `parse()`
    - Returns AST in new format (so called `internal`)
    - Dynamic scanner implemented
    - New AST format + dynamic scanner = performance boost and less memory consumption
    - No more `context` argument, context should be specified via `options`
    - Supported contexts now: `stylesheet`, `atrule`, `atruleExpression`, `ruleset`, `selector`, `simpleSelector`, `block`, `declaration` and `value` 
    - Drop `needPositions` option, `positions` option should be used instead
    - Drop `needInfo` option, `info` object is attaching to nodes when some information is requested by `options`
    - `options` should be an object, otherwise it treats as empty object
- `compress()`
    - No more AST converting (performance boost and less memory consumption)
    - Drop `outputAst` option
    - Returns an object as result instead of AST (i.e. `{ ast: Object }`)
- Drop methods: `justDoIt()`, `stringify()`, `cleanInfo()`

## 1.8.1 (March 30, 2016)

- Don't remove spaces after function/braces/urls since unsafe (#289)

## 1.8.0 (March 24, 2016)

- Usage data support:
    - Filter rulesets by tag names, class names and ids white lists.
    - More aggressive ruleset moving using class name scopes information.
    - New CLI option `--usage` to pass usage data file.
- Improve initial ruleset merge
    - Change order of ruleset processing, now it's left to right. Previously unmerged rulesets may prevent lookup and other rulesets merge.
    - Difference in pseudo signature just prevents ruleset merging, but don't stop lookup.
    - Simplify block comparison (performance).
- New method `csso.minifyBlock()` for css block compression (e.g. `style` attribute content).
- Ruleset merge improvement: at-rules with block (like `@media` or `@supports`) now can be skipped during ruleset merge lookup if doesn't contain something prevents it.
- FIX: Add negation (`:not()`) to pseudo signature to avoid unsafe merge (old browsers doesn't support it).
- FIX: Check nested parts of value when compute compatibility. It fixes unsafe property merging.

## 1.7.1 (March 16, 2016)

- pass block mode to tokenizer for correct parsing of declarations properties with `//` hack
- fix wrongly `@import` and `@charset` removal on double exclamation comment

## 1.7.0 (March 10, 2016)

- support for [CSS Custom Properties](https://www.w3.org/TR/css-variables/) (#279)
- rework RTBL properties merge – better merge for values with special units and don't merge values with CSS-wide keywords (#255)
- remove redundant universal selectors (#178)
- take in account `!important` when check for property overriding (#280)
- don't merge `text-align` declarations with some values (#281)
- add spaces around `/deep/` combinator on translate, since it together with universal selector can produce a comment
- better keyword and property name resolving (tolerant to hacks and so on)
- integration improvements
    - compression log function could be customized by `logger` option for `compress()` and `minify()`
    - make possible to set initial line and column for parser

## 1.6.4 (March 1, 2016)

- `npm` publish issue (#276)

## 1.6.3 (February 29, 2016)

- add `file` to generated source map since other tools can relay on it in source map transform chain

## 1.6.2 (February 29, 2016)

- tweak some parse error messages and their positions
- fix `:not()` parsing and selector groups in `:not()` is supported now (#215)
- `needPosition` parser option is deprecated, `positions` option should be used instead (`needPosition` is used still if `positions` option omitted)
- expose internal AST API as `csso.internal.*`
- `minify()` adds `sourcesContent` by default when source map is generated
- bring back support for node.js `0.10` until major release (#275)

## 1.6.1 (February 28, 2016)

- fix exception on zero length dimension compress outside declaration (#273)

## 1.6.0 (February 27, 2016)

- **source maps support**
- parser remake:
    - various parsing issues fixed
    - fix unicode sequence processing in ident (#191)
    - support for flags in attribute selector (#270)
    - position (line and column) of parse error (#109)
    - 4x performance boost, less memory consumption
- compressor refactoring
    - internal AST is using doubly linked lists (with safe transformation support during iteration) instead of arrays
    - rename `restructuring` to `restructure` option for `minify()`/`compress()` (`restructuring` is alias for `restructure` now, with lower priority)
    - unquote urls when possible (#141, #60)
- setup code coverage and a number of related fixes
- add eslint to check unused things

## 1.5.4 (January 27, 2016)

- one more fix (in `restructRuleset` this time) with merge of rulesets when a ruleset with same specificity places between them (#264)
- disable partial merge of rulesets in `@keyframes` rulesets (until sure it's correct)

## 1.5.3 (January 25, 2016)

- don't override display values with different browser support (#259)
- fix publish issue (one of modules leak in development state)

## 1.5.2 (January 24, 2016)

- don't merge rulesets if between them a ruleset with same specificity (#264)

## 1.5.1 (January 14, 2016)

- ensure `-` is not used as an identifier in attribute selectors (thanks to @mathiasbynens)
- fix broken `justDoIt()` function
- various small fixes

## 1.5.0 (January 14, 2016)

### Parser

- attach minus to number

### Compressor

- split code base into small modules and related refactoring
- introduce internal AST format for compressor (`gonzales`→`internal` and `internal`→`gonzales` convertors, walkers, translator)
- various optimizations: no snapshots, using caches and indexes
- sort selectors, merge selectors in alphabet order
- compute selector's specificity
- better ruleset restructuring, improve compression of partially equal blocks
- better ruleset merge – not only closest but also disjoined by other rulesets when safe
- join `@media` with same query
- `outputAst` – new option to specify output AST format (`gonzales` by default for backward compatibility)
- remove quotes surrounding attribute values in attribute selectors when possible (#73)
- replace `from`→`0%` and `100%`→`to` at `@keyframes` (#205)
- prevent partial merge of rulesets at `@keyframes` (#80, #197)

### API

- walker for `gonzales` AST was implemented

### CLI

- new option `--stat` (output stat in `stderr`)
- new optional parameter `level` for `--debug` option

## 1.4.4 (December 10, 2015)

- prevent removal of spaces after braces that before identifier that breaking at-rules expressions (#258)

## 1.4.3 (December 4, 2015)

- fix unicode-range parsing that cause to wrong function detection (#250)

## 1.4.2 (November 9, 2015)

- allow spaces between `progid:` and rest part of value for IE's `filter` property as `autoprefixer` generates this kind of code (#249)
- fixes for Windows:
  - correct processing new lines
  - normalize file content in test suite
- fixes to work in strict mode (#252)
- init compressor dictionaries for every css block (#248, #251)
- bump uglify-js version

## 1.4.1 (October 20, 2015)

- allow merge for `display` property (#167, #244)
- more accurate `rect` (`clip` property value) merge
- fix typo when specifying options in cli (thanks to @Taritsyn)
- fix safe unit values merge with keyword values (#244)
- fix wrong descendant combinator removal (#246)
- build browser version on `prepublish` (thanks to @silentroach)
- parser: store whitespaces as single token (performance and reduce memory consumption)
- rearrange compress tests layout

## 1.4 (October 16, 2015)

Bringing project back to life. Changed files structure, cleaned up and refactored most of sources.

### Common

- single code base (no more `src` folder)
- build browser version with `browserify` (no more `make`, and `web` folder), browser version is available at `dist/csso-browser.js`
- main file is `lib/index.js` now
- minimal `node.js` version is `0.12` now
- restrict file list to publish on npm (no more useless folders and files in package)
- add `jscs` to control code style
- automate `gh-pages` update
- util functions reworked
- translator reworked
- test suite reworked
- compressor refactored
- initial parser refactoring

### API

- new method `minify(src, options)`, options:
  - `restructuring` – if set to `false`, disable structure optimisations (`true` by default)
  - `debug` - outputs intermediate state of CSS during compression (`false` by default)
- deprecate `justDoIt()` method (use `minify` instead)
- rename `treeToString()` method to `stringify()`
- drop `printTree()` method
- AST node info
  - `column` and `offset` added
  - `ln` renamed to `line`
  - fix line counting across multiple files and input with CR LF (#147)

### CLI

- completely reworked, use [clap](https://github.com/lahmatiy/clap) to parse argv
- add support for input from stdin (#128)
- drop undocumented and obsoleted options `--rule` and `--parser` (suppose nobody use it)
- drop `-off` alias for `--restructure-off` as incorrect (only one letter options should starts with single `-`)
- new option `--debug` that reflecting to `options.debug` for `minify`

### Parsing and optimizations

- keep all exclamation comments (#194)
- add `/deep/` combinator support (#209)
- attribute selector
  - allow colon in attribute name (#237)
  - support for namespaces (#233)
- color
  - support all css/html colors
  - convert `hsla` to `rgba` and `hls` to `rgb`
  - convert `rgba` with 1 as alpha value to `rgb` (#122)
  - interpolate `rgb` and `rgba` percentage values to absolute values
  - replace percentage values in `rgba` for normalized/interpolated values
  - lowercase hex colors and color names (#169)
  - fix color minification when hex value replaced for color name (#176)
  - fit rgb values to 0..255 range (#181)
- calc
  - remove spaces for multiple operator in calc
  - don't remove units inside calc (#222)
  - fix wrong white space removal around `+` and `-` (#228)
- don't remove units in `flex` property as it could change value meaning (#200)
- don't merge `\9` hack values (#231)
- merge property values only if they have the same functions (#150, #227)
- don't merge property values with some sort of units (#140, #161)
- fix `!important` issue for `top-right-bottom-left` properties (#189)
- fix `top-right-bottom-left` properties merge (#139, #175)
- support for unicode-range (#148)
- don't crash on ruleset with no selector (#135)
- tolerant to class names that starts with digit (#99, #105)
- fix background compressing (#170)

## 1.3.12 (October 8, 2015)

- Case insensitive check for `!important` (#187)
- Fix problems with using `csso` as cli command on Windows (#83, #136, #142 and others)
- Remove byte order marker (the UTF-8 BOM) from input
- Don't strip space between funktion-funktion and funktion-vhash (#134)
- Don't merge TRBL values having \9 (hack for IE8 in bootstrap) (#159, #214, #230, #231 and others)
- Don't strip units off dimensions of non-length (#226, #229 and others)

## 1.3.7 (February 11, 2013)

- Gonzales 1.0.7.

## 1.3.6 (November 26, 2012)

- Gonzales 1.0.6.

## 1.3.5 (October 28, 2012)

- Gonzales 1.0.5.
- Protecting copyright notices in CSS: https://github.com/css/csso/issues/92
- Zero CSS throws an error: https://github.com/css/csso/issues/96
- Don't minify the second `0s` in Firefox for animations: https://github.com/css/csso/issues/100
- Japan manual
- BEM ready documentation

## 1.3.4 (October 10, 2012)

- @page inside @media Causes Error: https://github.com/css/csso/issues/90

## 1.3.3 (October 9, 2012)

- CSSO 1.3.2 compresses ".t-1" and ".t-01" as identical classes: https://github.com/css/csso/issues/88

## 1.3.2 (October 8, 2012)

- filter + important breaks CSSO v1.3.1: https://github.com/css/csso/issues/87

## 1.3.1 (October 8, 2012)

- "filter" IE property breaks CSSO v1.3.0: https://github.com/css/csso/issues/86

## 1.3.0 (October 4, 2012)

- PeCode CSS parser replaced by Gonzales CSS parser
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Copyright (C) 2011-2015 by Sergey Kryzhanovsky

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������README.md�������������������������������������������������������������������������������������������0000644�����������������00000030403�15120036664�0006026 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������[![NPM version](https://img.shields.io/npm/v/csso.svg)](https://www.npmjs.com/package/csso)
[![Build Status](https://travis-ci.org/css/csso.svg?branch=master)](https://travis-ci.org/css/csso)
[![Coverage Status](https://coveralls.io/repos/github/css/csso/badge.svg?branch=master)](https://coveralls.io/github/css/csso?branch=master)
[![NPM Downloads](https://img.shields.io/npm/dm/csso.svg)](https://www.npmjs.com/package/csso)
[![Twitter](https://img.shields.io/badge/Twitter-@cssoptimizer-blue.svg)](https://twitter.com/cssoptimizer)

CSSO (CSS Optimizer) is a CSS minifier. It performs three sort of transformations: cleaning (removing redundant), compression (replacement for shorter form) and restructuring (merge of declarations, rulesets and so on). As a result your CSS becomes much smaller.

[![Originated by Yandex](https://cdn.rawgit.com/css/csso/8d1b89211ac425909f735e7d5df87ee16c2feec6/docs/yandex.svg)](https://www.yandex.com/)
[![Sponsored by Avito](https://cdn.rawgit.com/css/csso/8d1b89211ac425909f735e7d5df87ee16c2feec6/docs/avito.svg)](https://www.avito.ru/)

## Ready to use

- [Web interface](http://css.github.io/csso/csso.html)
- [csso-cli](https://github.com/css/csso-cli) – command line interface
- [gulp-csso](https://github.com/ben-eb/gulp-csso) – `Gulp` plugin
- [grunt-csso](https://github.com/t32k/grunt-csso) – `Grunt` plugin
- [broccoli-csso](https://github.com/sindresorhus/broccoli-csso) – `Broccoli` plugin
- [postcss-csso](https://github.com/lahmatiy/postcss-csso) – `PostCSS` plugin
- [csso-loader](https://github.com/sandark7/csso-loader) – `webpack` loader
- [csso-webpack-plugin](https://github.com/zoobestik/csso-webpack-plugin) – `webpack` plugin
- [CSSO Visual Studio Code plugin](https://marketplace.visualstudio.com/items?itemName=Aneryu.csso)

## Install

```
npm install csso
```

## API

<!-- TOC depthfrom:3 -->

- [minify(source[, options])](#minifysource-options)
- [minifyBlock(source[, options])](#minifyblocksource-options)
- [syntax.compress(ast[, options])](#syntaxcompressast-options)
- [Source maps](#source-maps)
- [Usage data](#usage-data)
    - [White list filtering](#white-list-filtering)
    - [Black list filtering](#black-list-filtering)
    - [Scopes](#scopes)

<!-- /TOC -->

Basic usage:

```js
var csso = require('csso');

var minifiedCss = csso.minify('.test { color: #ff0000; }').css;

console.log(minifiedCss);
// .test{color:red}
```

CSSO is based on [CSSTree](https://github.com/csstree/csstree) to parse CSS into AST, AST traversal and to generate AST back to CSS. All `CSSTree` API is available behind `syntax` field. You may minify CSS step by step:

```js
var csso = require('csso');
var ast = csso.syntax.parse('.test { color: #ff0000; }');
var compressedAst = csso.syntax.compress(ast).ast;
var minifiedCss = csso.syntax.generate(compressedAst);

console.log(minifiedCss);
// .test{color:red}
```

> Warning: CSSO uses early versions of CSSTree that still in active development. CSSO doesn't guarantee API behind `syntax` field or AST format will not change in future releases of CSSO, since it's subject to change in CSSTree. Be careful with CSSO updates if you use `syntax` API until this warning removal.

### minify(source[, options])

Minify `source` CSS passed as `String`.

```js
var result = csso.minify('.test { color: #ff0000; }', {
    restructure: false,   // don't change CSS structure, i.e. don't merge declarations, rulesets etc
    debug: true           // show additional debug information:
                          // true or number from 1 to 3 (greater number - more details)
});

console.log(result.css);
// > .test{color:red}
```

Returns an object with properties:

- css `String` – resulting CSS
- map `Object` – instance of [`SourceMapGenerator`](https://github.com/mozilla/source-map#sourcemapgenerator) or `null`

Options:

- sourceMap

  Type: `Boolean`  
  Default: `false`

  Generate a source map when `true`.

- filename

  Type: `String`  
  Default: `'<unknown>'`

  Filename of input CSS, uses for source map generation.

- debug

  Type: `Boolean`  
  Default: `false`

  Output debug information to `stderr`.

- beforeCompress

  Type: `function(ast, options)` or `Array<function(ast, options)>` or `null`  
  Default: `null`

  Called right after parse is run.

- afterCompress

  Type: `function(compressResult, options)` or `Array<function(compressResult, options)>` or `null`  
  Default: `null`

  Called right after [`syntax.compress()`](#syntaxcompressast-options) is run.

- Other options are the same as for [`syntax.compress()`](#syntaxcompressast-options) function.

### minifyBlock(source[, options])

The same as `minify()` but for list of declarations. Usually it's a `style` attribute value.

```js
var result = csso.minifyBlock('color: rgba(255, 0, 0, 1); color: #ff0000');

console.log(result.css);
// > color:red
```

### syntax.compress(ast[, options])

Does the main task – compress an AST. This is CSSO's extension in CSSTree syntax API.

> NOTE: `syntax.compress()` performs AST compression by transforming input AST by default (since AST cloning is expensive and needed in rare cases). Use `clone` option with truthy value in case you want to keep input AST untouched.

Returns an object with properties:

- ast `Object` – resulting AST

Options:

- restructure

  Type: `Boolean`  
  Default: `true`

  Disable or enable a structure optimisations.

- forceMediaMerge

  Type: `Boolean`  
  Default: `false`

  Enables merging of `@media` rules with the same media query by splitted by other rules. The optimisation is unsafe in general, but should work fine in most cases. Use it on your own risk.

- clone

  Type: `Boolean`  
  Default: `false`

  Transform a copy of input AST if `true`. Useful in case of AST reuse.

- comments

  Type: `String` or `Boolean`  
  Default: `true`

  Specify what comments to leave:

  - `'exclamation'` or `true` – leave all exclamation comments (i.e. `/*! .. */`)
  - `'first-exclamation'` – remove every comment except first one
  - `false` – remove all comments

- usage

  Type: `Object` or `null`  
  Default: `null`

  Usage data for advanced optimisations (see [Usage data](#usage-data) for details)

- logger

  Type: `Function` or `null`  
  Default: `null`

  Function to track every step of transformation.

### Source maps

To get a source map set `true` for `sourceMap` option. Additianaly `filename` option can be passed to specify source file. When `sourceMap` option is `true`, `map` field of result object will contain a [`SourceMapGenerator`](https://github.com/mozilla/source-map#sourcemapgenerator) instance. This object can be mixed with another source map or translated to string.

```js
var csso = require('csso');
var css = fs.readFileSync('path/to/my.css', 'utf8');
var result = csso.minify(css, {
  filename: 'path/to/my.css', // will be added to source map as reference to source file
  sourceMap: true             // generate source map
});

console.log(result);
// { css: '...minified...', map: SourceMapGenerator {} }

console.log(result.map.toString());
// '{ .. source map content .. }'
```

Example of generating source map with respect of source map from input CSS:

```js
var require('source-map');
var csso = require('csso');
var inputFile = 'path/to/my.css';
var input = fs.readFileSync(inputFile, 'utf8');
var inputMap = input.match(/\/\*# sourceMappingURL=(\S+)\s*\*\/\s*$/);
var output = csso.minify(input, {
  filename: inputFile,
  sourceMap: true
});

// apply input source map to output
if (inputMap) {
  output.map.applySourceMap(
    new SourceMapConsumer(inputMap[1]),
    inputFile
  )
}

// result CSS with source map
console.log(
  output.css +
  '/*# sourceMappingURL=data:application/json;base64,' +
  new Buffer(output.map.toString()).toString('base64') +
  ' */'
);
```

### Usage data

`CSSO` can use data about how `CSS` is used in a markup for better compression. File with this data (`JSON`) can be set using `usage` option. Usage data may contain following sections:

- `blacklist` – a set of black lists (see [Black list filtering](#black-list-filtering))
- `tags` – white list of tags
- `ids` – white list of ids
- `classes` – white list of classes
- `scopes` – groups of classes which never used with classes from other groups on the same element

All sections are optional. Value of `tags`, `ids` and `classes` should be an array of a string, value of `scopes` should be an array of arrays of strings. Other values are ignoring.

#### White list filtering

`tags`, `ids` and `classes` are using on clean stage to filter selectors that contain something not in the lists. Selectors are filtering only by those kind of simple selector which white list is specified. For example, if only `tags` list is specified then type selectors are checking, and if all type selectors in selector present in list or selector has no any type selector it isn't filter.

> `ids` and `classes` are case sensitive, `tags` – is not.

Input CSS:

```css
* { color: green; }
ul, ol, li { color: blue; }
UL.foo, span.bar { color: red; }
```

Usage data:

```json
{
    "tags": ["ul", "LI"]
}
```

Resulting CSS:

```css
*{color:green}ul,li{color:blue}ul.foo{color:red}
```

Filtering performs for nested selectors too. `:not()` pseudos content is ignoring since the result of matching is unpredictable. Example for the same usage data as above:

```css
:nth-child(2n of ul, ol) { color: red }
:nth-child(3n + 1 of img) { color: yellow }
:not(div, ol, ul) { color: green }
:has(:matches(ul, ol), ul, ol) { color: blue }
```

Turns into:

```css
:nth-child(2n of ul){color:red}:not(div,ol,ul){color:green}:has(:matches(ul),ul){color:blue}
```

#### Black list filtering

Black list filtering performs the same as white list filtering, but filters things that mentioned in the lists. `blacklist` can contain the lists `tags`, `ids` and `classes`.

Black list has a higher priority, so when something mentioned in the white list and in the black list then white list occurrence is ignoring. The `:not()` pseudos content ignoring as well.

```css
* { color: green; }
ul, ol, li { color: blue; }
UL.foo, li.bar { color: red; }
```

Usage data:

```json
{
    "blacklist": {
        "tags": ["ul"]
    },
    "tags": ["ul", "LI"]
}
```

Resulting CSS:

```css
*{color:green}li{color:blue}li.bar{color:red}
```

#### Scopes

Scopes is designed for CSS scope isolation solutions such as [css-modules](https://github.com/css-modules/css-modules). Scopes are similar to namespaces and define lists of class names that exclusively used on some markup. This information allows the optimizer to move rules more agressive. Since it assumes selectors from different scopes don't match for the same element. This can improve rule merging.

Suppose we have a file:

```css
.module1-foo { color: red; }
.module1-bar { font-size: 1.5em; background: yellow; }

.module2-baz { color: red; }
.module2-qux { font-size: 1.5em; background: yellow; width: 50px; }
```

It can be assumed that first two rules are never used with the second two on the same markup. But we can't say that for sure without a markup review. The optimizer doesn't know it either and will perform safe transformations only. The result will be the same as input but with no spaces and some semicolons:

```css
.module1-foo{color:red}.module1-bar{font-size:1.5em;background:#ff0}.module2-baz{color:red}.module2-qux{font-size:1.5em;background:#ff0;width:50px}
```

With usage data `CSSO` can produce better output. If follow usage data is provided:

```json
{
    "scopes": [
        ["module1-foo", "module1-bar"],
        ["module2-baz", "module2-qux"]
    ]
}
```

The result will be (29 bytes extra saving):

```css
.module1-foo,.module2-baz{color:red}.module1-bar,.module2-qux{font-size:1.5em;background:#ff0}.module2-qux{width:50px}
```

If class name isn't mentioned in the `scopes` it belongs to default scope. `scopes` data doesn't affect `classes` whitelist. If class name mentioned in `scopes` but missed in `classes` (both sections are specified) it will be filtered.

Note that class name can't be set for several scopes. Also a selector can't have class names from different scopes. In both cases an exception will thrown.

Currently the optimizer doesn't care about changing order safety for out-of-bounds selectors (i.e. selectors that match to elements without class name, e.g. `.scope div` or `.scope ~ :last-child`). It assumes that scoped CSS modules doesn't relay on it's order. It may be fix in future if to be an issue.
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expected"),Hr.call(this,0!==t),45===t?"-"+this.consume(qr):this.consume(qr)}var Gr={name:"AnPlusB",structure:{a:[String,null],b:[String,null]},parse:function(){var e=this.scanner.tokenStart,t=null,n=null;if(this.scanner.tokenType===qr)Hr.call(this,!1),n=this.consume(qr);else if(this.scanner.tokenType===Wr&&Rr(this.scanner.source,this.scanner.tokenStart,45))switch(t="-1",Vr.call(this,1,110),this.scanner.getTokenLength()){case 2:this.scanner.next(),n=Kr.call(this);break;case 3:Vr.call(this,2,45),this.scanner.next(),this.scanner.skipSC(),Hr.call(this,!0),n="-"+this.consume(qr);break;default:Vr.call(this,2,45),Ur.call(this,3,!0),this.scanner.next(),n=this.scanner.substrToCursor(e+2);}else if(this.scanner.tokenType===Wr||this.scanner.isDelim(43)&&this.scanner.lookupType(1)===Wr){var r=0;switch(t="1",this.scanner.isDelim(43)&&(r=1,this.scanner.next()),Vr.call(this,0,110),this.scanner.getTokenLength()){case 1:this.scanner.next(),n=Kr.call(this);break;case 2:Vr.call(this,1,45),this.scanner.next(),this.scanner.skipSC(),Hr.call(this,!0),n="-"+this.consume(qr);break;default:Vr.call(this,1,45),Ur.call(this,2,!0),this.scanner.next(),n=this.scanner.substrToCursor(e+r+1);}}else if(this.scanner.tokenType===Yr){for(var i=this.scanner.source.charCodeAt(this.scanner.tokenStart),a=(r=43===i||45===i,this.scanner.tokenStart+r);a<this.scanner.tokenEnd&&Mr(this.scanner.source.charCodeAt(a));a++);a===this.scanner.tokenStart+r&&this.error("Integer is expected",this.scanner.tokenStart+r),Vr.call(this,a-this.scanner.tokenStart,110),t=this.scanner.source.substring(e,a),a+1===this.scanner.tokenEnd?(this.scanner.next(),n=Kr.call(this)):(Vr.call(this,a-this.scanner.tokenStart+1,45),a+2===this.scanner.tokenEnd?(this.scanner.next(),this.scanner.skipSC(),Hr.call(this,!0),n="-"+this.consume(qr)):(Ur.call(this,a-this.scanner.tokenStart+2,!0),this.scanner.next(),n=this.scanner.substrToCursor(a+1)));}else this.error();return null!==t&&43===t.charCodeAt(0)&&(t=t.substr(1)),null!==n&&43===n.charCodeAt(0)&&(n=n.substr(1)),{type:"AnPlusB",loc:this.getLocation(e,this.scanner.tokenStart),a:t,b:n}},generate:function(e){var t=null!==e.a&&void 0!==e.a,n=null!==e.b&&void 0!==e.b;t?(this.chunk("+1"===e.a?"+n":"1"===e.a?"n":"-1"===e.a?"-n":e.a+"n"),n&&("-"===(n=String(e.b)).charAt(0)||"+"===n.charAt(0)?(this.chunk(n.charAt(0)),this.chunk(n.substr(1))):(this.chunk("+"),this.chunk(n)))):this.chunk(String(e.b));}},Qr=Ce.TYPE,Xr=Qr.WhiteSpace,Zr=Qr.Semicolon,$r=Qr.LeftCurlyBracket,Jr=Qr.Delim;function ei(){return this.scanner.tokenIndex>0&&this.scanner.lookupType(-1)===Xr?this.scanner.tokenIndex>1?this.scanner.getTokenStart(this.scanner.tokenIndex-1):this.scanner.firstCharOffset:this.scanner.tokenStart}function ti(){return 0}var ni={name:"Raw",structure:{value:String},parse:function(e,t,n){var r,i=this.scanner.getTokenStart(e);return this.scanner.skip(this.scanner.getRawLength(e,t||ti)),r=n&&this.scanner.tokenStart>i?ei.call(this):this.scanner.tokenStart,{type:"Raw",loc:this.getLocation(i,r),value:this.scanner.source.substring(i,r)}},generate:function(e){this.chunk(e.value);},mode:{default:ti,leftCurlyBracket:function(e){return e===$r?1:0},leftCurlyBracketOrSemicolon:function(e){return e===$r||e===Zr?1:0},exclamationMarkOrSemicolon:function(e,t,n){return e===Jr&&33===t.charCodeAt(n)||e===Zr?1:0},semicolonIncluded:function(e){return e===Zr?2:0}}},ri=Ce.TYPE,ii=ni.mode,ai=ri.AtKeyword,oi=ri.Semicolon,si=ri.LeftCurlyBracket,li=ri.RightCurlyBracket;function ci(e){return this.Raw(e,ii.leftCurlyBracketOrSemicolon,!0)}function ui(){for(var e,t=1;e=this.scanner.lookupType(t);t++){if(e===li)return !0;if(e===si||e===ai)return !1}return !1}var hi={name:"Atrule",structure:{name:String,prelude:["AtrulePrelude","Raw",null],block:["Block",null]},parse:function(){var e,t,n=this.scanner.tokenStart,r=null,i=null;switch(this.eat(ai),t=(e=this.scanner.substrToCursor(n+1)).toLowerCase(),this.scanner.skipSC(),!1===this.scanner.eof&&this.scanner.tokenType!==si&&this.scanner.tokenType!==oi&&(this.parseAtrulePrelude?"AtrulePrelude"===(r=this.parseWithFallback(this.AtrulePrelude.bind(this,e),ci)).type&&null===r.children.head&&(r=null):r=ci.call(this,this.scanner.tokenIndex),this.scanner.skipSC()),this.scanner.tokenType){case oi:this.scanner.next();break;case si:i=this.atrule.hasOwnProperty(t)&&"function"==typeof this.atrule[t].block?this.atrule[t].block.call(this):this.Block(ui.call(this));}return {type:"Atrule",loc:this.getLocation(n,this.scanner.tokenStart),name:e,prelude:r,block:i}},generate:function(e){this.chunk("@"),this.chunk(e.name),null!==e.prelude&&(this.chunk(" 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this.scanner.isDelim(42)?(t=!0,n=!1,this.scanner.next()):this.scanner.isDelim(124)||this.eat(bi),this.scanner.isDelim(124)?61!==this.scanner.source.charCodeAt(this.scanner.tokenStart+1)?(this.scanner.next(),this.eat(bi)):t&&this.error("Identifier is expected",this.scanner.tokenEnd):t&&this.error("Vertical line is expected"),n&&this.scanner.tokenType===ki&&(this.scanner.next(),this.eat(bi)),{type:"Identifier",loc:this.getLocation(e,this.scanner.tokenStart),name:this.scanner.substrToCursor(e)}}function Si(){var e=this.scanner.tokenStart,t=this.scanner.source.charCodeAt(e);return 61!==t&&126!==t&&94!==t&&36!==t&&42!==t&&124!==t&&this.error("Attribute selector (=, ~=, ^=, $=, *=, |=) is expected"),this.scanner.next(),61!==t&&(this.scanner.isDelim(61)||this.error("Equal sign is expected"),this.scanner.next()),this.scanner.substrToCursor(e)}var Ci={name:"AttributeSelector",structure:{name:"Identifier",matcher:[String,null],value:["String","Identifier",null],flags:[String,null]},parse:function(){var e,t=this.scanner.tokenStart,n=null,r=null,i=null;return this.eat(vi),this.scanner.skipSC(),e=wi.call(this),this.scanner.skipSC(),this.scanner.tokenType!==xi&&(this.scanner.tokenType!==bi&&(n=Si.call(this),this.scanner.skipSC(),r=this.scanner.tokenType===yi?this.String():this.Identifier(),this.scanner.skipSC()),this.scanner.tokenType===bi&&(i=this.scanner.getTokenValue(),this.scanner.next(),this.scanner.skipSC())),this.eat(xi),{type:"AttributeSelector",loc:this.getLocation(t,this.scanner.tokenStart),name:e,matcher:n,value:r,flags:i}},generate:function(e){var t=" ";this.chunk("["),this.node(e.name),null!==e.matcher&&(this.chunk(e.matcher),null!==e.value&&(this.node(e.value),"String"===e.value.type&&(t=""))),null!==e.flags&&(this.chunk(t),this.chunk(e.flags)),this.chunk("]");}},zi=Ce.TYPE,Ai=ni.mode,Pi=zi.WhiteSpace,Ti=zi.Comment,Li=zi.Semicolon,Ei=zi.AtKeyword,Di=zi.LeftCurlyBracket,Oi=zi.RightCurlyBracket;function Bi(e){return this.Raw(e,null,!0)}function Ii(){return this.parseWithFallback(this.Rule,Bi)}function Ni(e){return this.Raw(e,Ai.semicolonIncluded,!0)}function Ri(){if(this.scanner.tokenType===Li)return Ni.call(this,this.scanner.tokenIndex);var e=this.parseWithFallback(this.Declaration,Ni);return this.scanner.tokenType===Li&&this.scanner.next(),e}var Mi={name:"Block",structure:{children:[["Atrule","Rule","Declaration"]]},parse:function(e){var t=e?Ri:Ii,n=this.scanner.tokenStart,r=this.createList();this.eat(Di);e:for(;!this.scanner.eof;)switch(this.scanner.tokenType){case Oi:break e;case Pi:case Ti:this.scanner.next();break;case Ei:r.push(this.parseWithFallback(this.Atrule,Bi));break;default:r.push(t.call(this));}return this.scanner.eof||this.eat(Oi),{type:"Block",loc:this.getLocation(n,this.scanner.tokenStart),children:r}},generate:function(e){this.chunk("{"),this.children(e,(function(e){"Declaration"===e.type&&this.chunk(";");})),this.chunk("}");},walkContext:"block"},ji=Ce.TYPE,_i=ji.LeftSquareBracket,Fi=ji.RightSquareBracket,Wi={name:"Brackets",structure:{children:[[]]},parse:function(e,t){var n,r=this.scanner.tokenStart;return this.eat(_i),n=e.call(this,t),this.scanner.eof||this.eat(Fi),{type:"Brackets",loc:this.getLocation(r,this.scanner.tokenStart),children:n}},generate:function(e){this.chunk("["),this.children(e),this.chunk("]");}},qi=Ce.TYPE.CDC,Yi={name:"CDC",structure:[],parse:function(){var e=this.scanner.tokenStart;return this.eat(qi),{type:"CDC",loc:this.getLocation(e,this.scanner.tokenStart)}},generate:function(){this.chunk("--\x3e");}},Ui=Ce.TYPE.CDO,Hi={name:"CDO",structure:[],parse:function(){var e=this.scanner.tokenStart;return this.eat(Ui),{type:"CDO",loc:this.getLocation(e,this.scanner.tokenStart)}},generate:function(){this.chunk("\x3c!--");}},Vi=Ce.TYPE.Ident,Ki={name:"ClassSelector",structure:{name:String},parse:function(){return this.scanner.isDelim(46)||this.error("Full stop is expected"),this.scanner.next(),{type:"ClassSelector",loc:this.getLocation(this.scanner.tokenStart-1,this.scanner.tokenEnd),name:this.consume(Vi)}},generate:function(e){this.chunk("."),this.chunk(e.name);}},Gi=Ce.TYPE.Ident,Qi={name:"Combinator",structure:{name:String},parse:function(){var e=this.scanner.tokenStart;switch(this.scanner.source.charCodeAt(this.scanner.tokenStart)){case 62:case 43:case 126:this.scanner.next();break;case 47:this.scanner.next(),this.scanner.tokenType===Gi&&!1!==this.scanner.lookupValue(0,"deep")||this.error("Identifier `deep` is expected"),this.scanner.next(),this.scanner.isDelim(47)||this.error("Solidus is expected"),this.scanner.next();break;default:this.error("Combinator is expected");}return {type:"Combinator",loc:this.getLocation(e,this.scanner.tokenStart),name:this.scanner.substrToCursor(e)}},generate:function(e){this.chunk(e.name);}},Xi=Ce.TYPE.Comment,Zi={name:"Comment",structure:{value:String},parse:function(){var e=this.scanner.tokenStart,t=this.scanner.tokenEnd;return this.eat(Xi),t-e+2>=2&&42===this.scanner.source.charCodeAt(t-2)&&47===this.scanner.source.charCodeAt(t-1)&&(t-=2),{type:"Comment",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.source.substring(e+2,t)}},generate:function(e){this.chunk("/*"),this.chunk(e.value),this.chunk("*/");}},$i=ae.isCustomProperty,Ji=Ce.TYPE,ea=ni.mode,ta=Ji.Ident,na=Ji.Hash,ra=Ji.Colon,ia=Ji.Semicolon,aa=Ji.Delim,oa=Ji.WhiteSpace;function sa(e){return this.Raw(e,ea.exclamationMarkOrSemicolon,!0)}function la(e){return this.Raw(e,ea.exclamationMarkOrSemicolon,!1)}function ca(){var e=this.scanner.tokenIndex,t=this.Value();return "Raw"!==t.type&&!1===this.scanner.eof&&this.scanner.tokenType!==ia&&!1===this.scanner.isDelim(33)&&!1===this.scanner.isBalanceEdge(e)&&this.error(),t}var ua={name:"Declaration",structure:{important:[Boolean,String],property:String,value:["Value","Raw"]},parse:function(){var e,t=this.scanner.tokenStart,n=this.scanner.tokenIndex,r=ha.call(this),i=$i(r),a=i?this.parseCustomProperty:this.parseValue,o=i?la:sa,s=!1;this.scanner.skipSC(),this.eat(ra);const l=this.scanner.tokenIndex;if(i||this.scanner.skipSC(),e=a?this.parseWithFallback(ca,o):o.call(this,this.scanner.tokenIndex),i&&"Value"===e.type&&e.children.isEmpty())for(let t=l-this.scanner.tokenIndex;t<=0;t++)if(this.scanner.lookupType(t)===oa){e.children.appendData({type:"WhiteSpace",loc:null,value:" "});break}return this.scanner.isDelim(33)&&(s=pa.call(this),this.scanner.skipSC()),!1===this.scanner.eof&&this.scanner.tokenType!==ia&&!1===this.scanner.isBalanceEdge(n)&&this.error(),{type:"Declaration",loc:this.getLocation(t,this.scanner.tokenStart),important:s,property:r,value:e}},generate:function(e){this.chunk(e.property),this.chunk(":"),this.node(e.value),e.important&&this.chunk(!0===e.important?"!important":"!"+e.important);},walkContext:"declaration"};function ha(){var e=this.scanner.tokenStart;if(this.scanner.tokenType===aa)switch(this.scanner.source.charCodeAt(this.scanner.tokenStart)){case 42:case 36:case 43:case 35:case 38:this.scanner.next();break;case 47:this.scanner.next(),this.scanner.isDelim(47)&&this.scanner.next();}return this.scanner.tokenType===na?this.eat(na):this.eat(ta),this.scanner.substrToCursor(e)}function pa(){this.eat(aa),this.scanner.skipSC();var e=this.consume(ta);return "important"===e||e}var da=Ce.TYPE,ma=ni.mode,ga=da.WhiteSpace,fa=da.Comment,ba=da.Semicolon;function ya(e){return this.Raw(e,ma.semicolonIncluded,!0)}var ka={name:"DeclarationList",structure:{children:[["Declaration"]]},parse:function(){for(var e=this.createList();!this.scanner.eof;)switch(this.scanner.tokenType){case ga:case fa:case ba:this.scanner.next();break;default:e.push(this.parseWithFallback(this.Declaration,ya));}return {type:"DeclarationList",loc:this.getLocationFromList(e),children:e}},generate:function(e){this.children(e,(function(e){"Declaration"===e.type&&this.chunk(";");}));}},va=M.consumeNumber,xa=Ce.TYPE.Dimension,wa={name:"Dimension",structure:{value:String,unit:String},parse:function(){var e=this.scanner.tokenStart,t=va(this.scanner.source,e);return this.eat(xa),{type:"Dimension",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.source.substring(e,t),unit:this.scanner.source.substring(t,this.scanner.tokenStart)}},generate:function(e){this.chunk(e.value),this.chunk(e.unit);}},Sa=Ce.TYPE.RightParenthesis,Ca={name:"Function",structure:{name:String,children:[[]]},parse:function(e,t){var n,r=this.scanner.tokenStart,i=this.consumeFunctionName(),a=i.toLowerCase();return n=t.hasOwnProperty(a)?t[a].call(this,t):e.call(this,t),this.scanner.eof||this.eat(Sa),{type:"Function",loc:this.getLocation(r,this.scanner.tokenStart),name:i,children:n}},generate:function(e){this.chunk(e.name),this.chunk("("),this.children(e),this.chunk(")");},walkContext:"function"},za=Ce.TYPE.Hash,Aa={name:"Hash",structure:{value:String},parse:function(){var e=this.scanner.tokenStart;return this.eat(za),{type:"Hash",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.substrToCursor(e+1)}},generate:function(e){this.chunk("#"),this.chunk(e.value);}},Pa=Ce.TYPE.Ident,Ta={name:"Identifier",structure:{name:String},parse:function(){return {type:"Identifier",loc:this.getLocation(this.scanner.tokenStart,this.scanner.tokenEnd),name:this.consume(Pa)}},generate:function(e){this.chunk(e.name);}},La=Ce.TYPE.Hash,Ea={name:"IdSelector",structure:{name:String},parse:function(){var e=this.scanner.tokenStart;return this.eat(La),{type:"IdSelector",loc:this.getLocation(e,this.scanner.tokenStart),name:this.scanner.substrToCursor(e+1)}},generate:function(e){this.chunk("#"),this.chunk(e.name);}},Da=Ce.TYPE,Oa=Da.Ident,Ba=Da.Number,Ia=Da.Dimension,Na=Da.LeftParenthesis,Ra=Da.RightParenthesis,Ma=Da.Colon,ja=Da.Delim,_a={name:"MediaFeature",structure:{name:String,value:["Identifier","Number","Dimension","Ratio",null]},parse:function(){var e,t=this.scanner.tokenStart,n=null;if(this.eat(Na),this.scanner.skipSC(),e=this.consume(Oa),this.scanner.skipSC(),this.scanner.tokenType!==Ra){switch(this.eat(Ma),this.scanner.skipSC(),this.scanner.tokenType){case Ba:n=this.lookupNonWSType(1)===ja?this.Ratio():this.Number();break;case Ia:n=this.Dimension();break;case Oa:n=this.Identifier();break;default:this.error("Number, dimension, ratio or identifier is expected");}this.scanner.skipSC();}return this.eat(Ra),{type:"MediaFeature",loc:this.getLocation(t,this.scanner.tokenStart),name:e,value:n}},generate:function(e){this.chunk("("),this.chunk(e.name),null!==e.value&&(this.chunk(":"),this.node(e.value)),this.chunk(")");}},Fa=Ce.TYPE,Wa=Fa.WhiteSpace,qa=Fa.Comment,Ya=Fa.Ident,Ua=Fa.LeftParenthesis,Ha={name:"MediaQuery",structure:{children:[["Identifier","MediaFeature","WhiteSpace"]]},parse:function(){this.scanner.skipSC();var e=this.createList(),t=null,n=null;e:for(;!this.scanner.eof;){switch(this.scanner.tokenType){case qa:this.scanner.next();continue;case Wa:n=this.WhiteSpace();continue;case Ya:t=this.Identifier();break;case Ua:t=this.MediaFeature();break;default:break e}null!==n&&(e.push(n),n=null),e.push(t);}return null===t&&this.error("Identifier or parenthesis is expected"),{type:"MediaQuery",loc:this.getLocationFromList(e),children:e}},generate:function(e){this.children(e);}},Va=Ce.TYPE.Comma,Ka={name:"MediaQueryList",structure:{children:[["MediaQuery"]]},parse:function(e){var t=this.createList();for(this.scanner.skipSC();!this.scanner.eof&&(t.push(this.MediaQuery(e)),this.scanner.tokenType===Va);)this.scanner.next();return {type:"MediaQueryList",loc:this.getLocationFromList(t),children:t}},generate:function(e){this.children(e,(function(){this.chunk(",");}));}},Ga=Ce.TYPE.Number,Qa={name:"Number",structure:{value:String},parse:function(){return {type:"Number",loc:this.getLocation(this.scanner.tokenStart,this.scanner.tokenEnd),value:this.consume(Ga)}},generate:function(e){this.chunk(e.value);}},Xa={name:"Operator",structure:{value:String},parse:function(){var e=this.scanner.tokenStart;return this.scanner.next(),{type:"Operator",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.substrToCursor(e)}},generate:function(e){this.chunk(e.value);}},Za=Ce.TYPE,$a=Za.LeftParenthesis,Ja=Za.RightParenthesis,eo={name:"Parentheses",structure:{children:[[]]},parse:function(e,t){var n,r=this.scanner.tokenStart;return this.eat($a),n=e.call(this,t),this.scanner.eof||this.eat(Ja),{type:"Parentheses",loc:this.getLocation(r,this.scanner.tokenStart),children:n}},generate:function(e){this.chunk("("),this.children(e),this.chunk(")");}},to=M.consumeNumber,no=Ce.TYPE.Percentage,ro={name:"Percentage",structure:{value:String},parse:function(){var e=this.scanner.tokenStart,t=to(this.scanner.source,e);return this.eat(no),{type:"Percentage",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.source.substring(e,t)}},generate:function(e){this.chunk(e.value),this.chunk("%");}},io=Ce.TYPE,ao=io.Ident,oo=io.Function,so=io.Colon,lo=io.RightParenthesis,co={name:"PseudoClassSelector",structure:{name:String,children:[["Raw"],null]},parse:function(){var e,t,n=this.scanner.tokenStart,r=null;return this.eat(so),this.scanner.tokenType===oo?(t=(e=this.consumeFunctionName()).toLowerCase(),this.pseudo.hasOwnProperty(t)?(this.scanner.skipSC(),r=this.pseudo[t].call(this),this.scanner.skipSC()):(r=this.createList()).push(this.Raw(this.scanner.tokenIndex,null,!1)),this.eat(lo)):e=this.consume(ao),{type:"PseudoClassSelector",loc:this.getLocation(n,this.scanner.tokenStart),name:e,children:r}},generate:function(e){this.chunk(":"),this.chunk(e.name),null!==e.children&&(this.chunk("("),this.children(e),this.chunk(")"));},walkContext:"function"},uo=Ce.TYPE,ho=uo.Ident,po=uo.Function,mo=uo.Colon,go=uo.RightParenthesis,fo={name:"PseudoElementSelector",structure:{name:String,children:[["Raw"],null]},parse:function(){var e,t,n=this.scanner.tokenStart,r=null;return this.eat(mo),this.eat(mo),this.scanner.tokenType===po?(t=(e=this.consumeFunctionName()).toLowerCase(),this.pseudo.hasOwnProperty(t)?(this.scanner.skipSC(),r=this.pseudo[t].call(this),this.scanner.skipSC()):(r=this.createList()).push(this.Raw(this.scanner.tokenIndex,null,!1)),this.eat(go)):e=this.consume(ho),{type:"PseudoElementSelector",loc:this.getLocation(n,this.scanner.tokenStart),name:e,children:r}},generate:function(e){this.chunk("::"),this.chunk(e.name),null!==e.children&&(this.chunk("("),this.children(e),this.chunk(")"));},walkContext:"function"},bo=Ce.isDigit,yo=Ce.TYPE,ko=yo.Number,vo=yo.Delim;function xo(){this.scanner.skipWS();for(var e=this.consume(ko),t=0;t<e.length;t++){var n=e.charCodeAt(t);bo(n)||46===n||this.error("Unsigned number is expected",this.scanner.tokenStart-e.length+t);}return 0===Number(e)&&this.error("Zero number is not allowed",this.scanner.tokenStart-e.length),e}var wo={name:"Ratio",structure:{left:String,right:String},parse:function(){var e,t=this.scanner.tokenStart,n=xo.call(this);return this.scanner.skipWS(),this.scanner.isDelim(47)||this.error("Solidus is expected"),this.eat(vo),e=xo.call(this),{type:"Ratio",loc:this.getLocation(t,this.scanner.tokenStart),left:n,right:e}},generate:function(e){this.chunk(e.left),this.chunk("/"),this.chunk(e.right);}},So=Ce.TYPE,Co=ni.mode,zo=So.LeftCurlyBracket;function Ao(e){return this.Raw(e,Co.leftCurlyBracket,!0)}function Po(){var e=this.SelectorList();return "Raw"!==e.type&&!1===this.scanner.eof&&this.scanner.tokenType!==zo&&this.error(),e}var To={name:"Rule",structure:{prelude:["SelectorList","Raw"],block:["Block"]},parse:function(){var e,t,n=this.scanner.tokenIndex,r=this.scanner.tokenStart;return e=this.parseRulePrelude?this.parseWithFallback(Po,Ao):Ao.call(this,n),t=this.Block(!0),{type:"Rule",loc:this.getLocation(r,this.scanner.tokenStart),prelude:e,block:t}},generate:function(e){this.node(e.prelude),this.node(e.block);},walkContext:"rule"},Lo=Ce.TYPE.Comma,Eo={name:"SelectorList",structure:{children:[["Selector","Raw"]]},parse:function(){for(var e=this.createList();!this.scanner.eof&&(e.push(this.Selector()),this.scanner.tokenType===Lo);)this.scanner.next();return {type:"SelectorList",loc:this.getLocationFromList(e),children:e}},generate:function(e){this.children(e,(function(){this.chunk(",");}));},walkContext:"selector"},Do=Ce.TYPE.String,Oo={name:"String",structure:{value:String},parse:function(){return {type:"String",loc:this.getLocation(this.scanner.tokenStart,this.scanner.tokenEnd),value:this.consume(Do)}},generate:function(e){this.chunk(e.value);}},Bo=Ce.TYPE,Io=Bo.WhiteSpace,No=Bo.Comment,Ro=Bo.AtKeyword,Mo=Bo.CDO,jo=Bo.CDC;function _o(e){return this.Raw(e,null,!1)}var Fo={name:"StyleSheet",structure:{children:[["Comment","CDO","CDC","Atrule","Rule","Raw"]]},parse:function(){for(var e,t=this.scanner.tokenStart,n=this.createList();!this.scanner.eof;){switch(this.scanner.tokenType){case Io:this.scanner.next();continue;case No:if(33!==this.scanner.source.charCodeAt(this.scanner.tokenStart+2)){this.scanner.next();continue}e=this.Comment();break;case Mo:e=this.CDO();break;case jo:e=this.CDC();break;case Ro:e=this.parseWithFallback(this.Atrule,_o);break;default:e=this.parseWithFallback(this.Rule,_o);}n.push(e);}return {type:"StyleSheet",loc:this.getLocation(t,this.scanner.tokenStart),children:n}},generate:function(e){this.children(e);},walkContext:"stylesheet"},Wo=Ce.TYPE.Ident;function qo(){this.scanner.tokenType!==Wo&&!1===this.scanner.isDelim(42)&&this.error("Identifier or asterisk is expected"),this.scanner.next();}var Yo={name:"TypeSelector",structure:{name:String},parse:function(){var e=this.scanner.tokenStart;return this.scanner.isDelim(124)?(this.scanner.next(),qo.call(this)):(qo.call(this),this.scanner.isDelim(124)&&(this.scanner.next(),qo.call(this))),{type:"TypeSelector",loc:this.getLocation(e,this.scanner.tokenStart),name:this.scanner.substrToCursor(e)}},generate:function(e){this.chunk(e.name);}},Uo=Ce.isHexDigit,Ho=Ce.cmpChar,Vo=Ce.TYPE,Ko=Ce.NAME,Go=Vo.Ident,Qo=Vo.Number,Xo=Vo.Dimension;function Zo(e,t){for(var n=this.scanner.tokenStart+e,r=0;n<this.scanner.tokenEnd;n++){var i=this.scanner.source.charCodeAt(n);if(45===i&&t&&0!==r)return 0===Zo.call(this,e+r+1,!1)&&this.error(),-1;Uo(i)||this.error(t&&0!==r?"HyphenMinus"+(r<6?" or hex digit":"")+" is expected":r<6?"Hex digit is expected":"Unexpected input",n),++r>6&&this.error("Too many hex digits",n);}return this.scanner.next(),r}function $o(e){for(var t=0;this.scanner.isDelim(63);)++t>e&&this.error("Too many question marks"),this.scanner.next();}function Jo(e){this.scanner.source.charCodeAt(this.scanner.tokenStart)!==e&&this.error(Ko[e]+" is expected");}function es(){var e=0;return this.scanner.isDelim(43)?(this.scanner.next(),this.scanner.tokenType===Go?void((e=Zo.call(this,0,!0))>0&&$o.call(this,6-e)):this.scanner.isDelim(63)?(this.scanner.next(),void $o.call(this,5)):void this.error("Hex digit or question mark is expected")):this.scanner.tokenType===Qo?(Jo.call(this,43),e=Zo.call(this,1,!0),this.scanner.isDelim(63)?void $o.call(this,6-e):this.scanner.tokenType===Xo||this.scanner.tokenType===Qo?(Jo.call(this,45),void Zo.call(this,1,!1)):void 0):this.scanner.tokenType===Xo?(Jo.call(this,43),void((e=Zo.call(this,1,!0))>0&&$o.call(this,6-e))):void this.error()}var ts={name:"UnicodeRange",structure:{value:String},parse:function(){var e=this.scanner.tokenStart;return Ho(this.scanner.source,e,117)||this.error("U is expected"),Ho(this.scanner.source,e+1,43)||this.error("Plus sign is expected"),this.scanner.next(),es.call(this),{type:"UnicodeRange",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.substrToCursor(e)}},generate:function(e){this.chunk(e.value);}},ns=Ce.isWhiteSpace,rs=Ce.cmpStr,is=Ce.TYPE,as=is.Function,os=is.Url,ss=is.RightParenthesis,ls={name:"Url",structure:{value:["String","Raw"]},parse:function(){var e,t=this.scanner.tokenStart;switch(this.scanner.tokenType){case os:for(var n=t+4,r=this.scanner.tokenEnd-1;n<r&&ns(this.scanner.source.charCodeAt(n));)n++;for(;n<r&&ns(this.scanner.source.charCodeAt(r-1));)r--;e={type:"Raw",loc:this.getLocation(n,r),value:this.scanner.source.substring(n,r)},this.eat(os);break;case as:rs(this.scanner.source,this.scanner.tokenStart,this.scanner.tokenEnd,"url(")||this.error("Function name must be `url`"),this.eat(as),this.scanner.skipSC(),e=this.String(),this.scanner.skipSC(),this.eat(ss);break;default:this.error("Url or Function is expected");}return {type:"Url",loc:this.getLocation(t,this.scanner.tokenStart),value:e}},generate:function(e){this.chunk("url"),this.chunk("("),this.node(e.value),this.chunk(")");}},cs=Ce.TYPE.WhiteSpace,us=Object.freeze({type:"WhiteSpace",loc:null,value:" "}),hs={AnPlusB:Gr,Atrule:hi,AtrulePrelude:gi,AttributeSelector:Ci,Block:Mi,Brackets:Wi,CDC:Yi,CDO:Hi,ClassSelector:Ki,Combinator:Qi,Comment:Zi,Declaration:ua,DeclarationList:ka,Dimension:wa,Function:Ca,Hash:Aa,Identifier:Ta,IdSelector:Ea,MediaFeature:_a,MediaQuery:Ha,MediaQueryList:Ka,Nth:{name:"Nth",structure:{nth:["AnPlusB","Identifier"],selector:["SelectorList",null]},parse:function(e){this.scanner.skipSC();var t,n=this.scanner.tokenStart,r=n,i=null;return t=this.scanner.lookupValue(0,"odd")||this.scanner.lookupValue(0,"even")?this.Identifier():this.AnPlusB(),this.scanner.skipSC(),e&&this.scanner.lookupValue(0,"of")?(this.scanner.next(),i=this.SelectorList(),this.needPositions&&(r=this.getLastListNode(i.children).loc.end.offset)):this.needPositions&&(r=t.loc.end.offset),{type:"Nth",loc:this.getLocation(n,r),nth:t,selector:i}},generate:function(e){this.node(e.nth),null!==e.selector&&(this.chunk(" of "),this.node(e.selector));}},Number:Qa,Operator:Xa,Parentheses:eo,Percentage:ro,PseudoClassSelector:co,PseudoElementSelector:fo,Ratio:wo,Raw:ni,Rule:To,Selector:{name:"Selector",structure:{children:[["TypeSelector","IdSelector","ClassSelector","AttributeSelector","PseudoClassSelector","PseudoElementSelector","Combinator","WhiteSpace"]]},parse:function(){var e=this.readSequence(this.scope.Selector);return null===this.getFirstListNode(e)&&this.error("Selector is expected"),{type:"Selector",loc:this.getLocationFromList(e),children:e}},generate:function(e){this.children(e);}},SelectorList:Eo,String:Oo,StyleSheet:Fo,TypeSelector:Yo,UnicodeRange:ts,Url:ls,Value:{name:"Value",structure:{children:[[]]},parse:function(){var e=this.scanner.tokenStart,t=this.readSequence(this.scope.Value);return {type:"Value",loc:this.getLocation(e,this.scanner.tokenStart),children:t}},generate:function(e){this.children(e);}},WhiteSpace:{name:"WhiteSpace",structure:{value:String},parse:function(){return this.eat(cs),us},generate:function(e){this.chunk(e.value);}}},ps={generic:!0,types:Nr.types,atrules:Nr.atrules,properties:Nr.properties,node:hs},ds=Ce.cmpChar,ms=Ce.cmpStr,gs=Ce.TYPE,fs=gs.Ident,bs=gs.String,ys=gs.Number,ks=gs.Function,vs=gs.Url,xs=gs.Hash,ws=gs.Dimension,Ss=gs.Percentage,Cs=gs.LeftParenthesis,zs=gs.LeftSquareBracket,As=gs.Comma,Ps=gs.Delim,Ts=function(e){switch(this.scanner.tokenType){case xs:return this.Hash();case As:return e.space=null,e.ignoreWSAfter=!0,this.Operator();case Cs:return this.Parentheses(this.readSequence,e.recognizer);case zs:return this.Brackets(this.readSequence,e.recognizer);case bs:return this.String();case ws:return this.Dimension();case Ss:return this.Percentage();case ys:return this.Number();case ks:return ms(this.scanner.source,this.scanner.tokenStart,this.scanner.tokenEnd,"url(")?this.Url():this.Function(this.readSequence,e.recognizer);case vs:return this.Url();case fs:return ds(this.scanner.source,this.scanner.tokenStart,117)&&ds(this.scanner.source,this.scanner.tokenStart+1,43)?this.UnicodeRange():this.Identifier();case Ps:var t=this.scanner.source.charCodeAt(this.scanner.tokenStart);if(47===t||42===t||43===t||45===t)return this.Operator();35===t&&this.error("Hex or identifier is expected",this.scanner.tokenStart+1);}},Ls={getNode:Ts},Es=Ce.TYPE,Ds=Es.Delim,Os=Es.Ident,Bs=Es.Dimension,Is=Es.Percentage,Ns=Es.Number,Rs=Es.Hash,Ms=Es.Colon,js=Es.LeftSquareBracket;var _s={getNode:function(e){switch(this.scanner.tokenType){case js:return this.AttributeSelector();case Rs:return this.IdSelector();case Ms:return this.scanner.lookupType(1)===Ms?this.PseudoElementSelector():this.PseudoClassSelector();case Os:return this.TypeSelector();case Ns:case Is:return this.Percentage();case Bs:46===this.scanner.source.charCodeAt(this.scanner.tokenStart)&&this.error("Identifier is expected",this.scanner.tokenStart+1);break;case Ds:switch(this.scanner.source.charCodeAt(this.scanner.tokenStart)){case 43:case 62:case 126:return e.space=null,e.ignoreWSAfter=!0,this.Combinator();case 47:return this.Combinator();case 46:return this.ClassSelector();case 42:case 124:return this.TypeSelector();case 35:return this.IdSelector()}}}},Fs=Ce.TYPE,Ws=ni.mode,qs=Fs.Comma,Ys=Fs.WhiteSpace,Us={AtrulePrelude:Ls,Selector:_s,Value:{getNode:Ts,expression:function(){return this.createSingleNodeList(this.Raw(this.scanner.tokenIndex,null,!1))},var:function(){var e=this.createList();if(this.scanner.skipSC(),e.push(this.Identifier()),this.scanner.skipSC(),this.scanner.tokenType===qs){e.push(this.Operator());const t=this.scanner.tokenIndex,n=this.parseCustomProperty?this.Value(null):this.Raw(this.scanner.tokenIndex,Ws.exclamationMarkOrSemicolon,!1);if("Value"===n.type&&n.children.isEmpty())for(let e=t-this.scanner.tokenIndex;e<=0;e++)if(this.scanner.lookupType(e)===Ys){n.children.appendData({type:"WhiteSpace",loc:null,value:" "});break}e.push(n);}return e}}},Hs=Ce.TYPE,Vs=Hs.String,Ks=Hs.Ident,Gs=Hs.Url,Qs=Hs.Function,Xs=Hs.LeftParenthesis,Zs={parse:{prelude:function(){var e=this.createList();switch(this.scanner.skipSC(),this.scanner.tokenType){case Vs:e.push(this.String());break;case Gs:case Qs:e.push(this.Url());break;default:this.error("String or url() is expected");}return this.lookupNonWSType(0)!==Ks&&this.lookupNonWSType(0)!==Xs||(e.push(this.WhiteSpace()),e.push(this.MediaQueryList())),e},block:null}},$s=Ce.TYPE,Js=$s.WhiteSpace,el=$s.Comment,tl=$s.Ident,nl=$s.Function,rl=$s.Colon,il=$s.LeftParenthesis;function al(){return this.createSingleNodeList(this.Raw(this.scanner.tokenIndex,null,!1))}function ol(){return this.scanner.skipSC(),this.scanner.tokenType===tl&&this.lookupNonWSType(1)===rl?this.createSingleNodeList(this.Declaration()):sl.call(this)}function sl(){var e,t=this.createList(),n=null;this.scanner.skipSC();e:for(;!this.scanner.eof;){switch(this.scanner.tokenType){case Js:n=this.WhiteSpace();continue;case el:this.scanner.next();continue;case nl:e=this.Function(al,this.scope.AtrulePrelude);break;case tl:e=this.Identifier();break;case il:e=this.Parentheses(ol,this.scope.AtrulePrelude);break;default:break e}null!==n&&(t.push(n),n=null),t.push(e);}return t}var ll,cl={parse:function(){return this.createSingleNodeList(this.SelectorList())}},ul={parse:function(){return this.createSingleNodeList(this.Nth(!0))}},hl={parse:function(){return this.createSingleNodeList(this.Nth(!1))}},pl={parseContext:{default:"StyleSheet",stylesheet:"StyleSheet",atrule:"Atrule",atrulePrelude:function(e){return this.AtrulePrelude(e.atrule?String(e.atrule):null)},mediaQueryList:"MediaQueryList",mediaQuery:"MediaQuery",rule:"Rule",selectorList:"SelectorList",selector:"Selector",block:function(){return this.Block(!0)},declarationList:"DeclarationList",declaration:"Declaration",value:"Value"},scope:Us,atrule:{"font-face":{parse:{prelude:null,block:function(){return this.Block(!0)}}},import:Zs,media:{parse:{prelude:function(){return this.createSingleNodeList(this.MediaQueryList())},block:function(){return this.Block(!1)}}},page:{parse:{prelude:function(){return this.createSingleNodeList(this.SelectorList())},block:function(){return this.Block(!0)}}},supports:{parse:{prelude:function(){var e=sl.call(this);return null===this.getFirstListNode(e)&&this.error("Condition is expected"),e},block:function(){return this.Block(!1)}}}},pseudo:{dir:{parse:function(){return this.createSingleNodeList(this.Identifier())}},has:{parse:function(){return this.createSingleNodeList(this.SelectorList())}},lang:{parse:function(){return this.createSingleNodeList(this.Identifier())}},matches:cl,not:cl,"nth-child":ul,"nth-last-child":ul,"nth-last-of-type":hl,"nth-of-type":hl,slotted:{parse:function(){return this.createSingleNodeList(this.Selector())}}},node:hs},dl={node:hs},ml={version:"1.1.2"},gl=(ll=Object.freeze({__proto__:null,version:"1.1.2",default:ml}))&&ll.default||ll;var fl=Ir(function(){for(var e={},t=0;t<arguments.length;t++){var n=arguments[t];for(var r in n)e[r]=n[r];}return e}(ps,pl,dl)),bl=gl.version;return fl.version=bl,fl}));
	});

	var hasOwnProperty = Object.prototype.hasOwnProperty;

	function buildMap(list, caseInsensitive) {
	    var map = Object.create(null);

	    if (!Array.isArray(list)) {
	        return null;
	    }

	    for (var i = 0; i < list.length; i++) {
	        var name = list[i];

	        if (caseInsensitive) {
	            name = name.toLowerCase();
	        }

	        map[name] = true;
	    }

	    return map;
	}

	function buildList(data) {
	    if (!data) {
	        return null;
	    }

	    var tags = buildMap(data.tags, true);
	    var ids = buildMap(data.ids);
	    var classes = buildMap(data.classes);

	    if (tags === null &&
	        ids === null &&
	        classes === null) {
	        return null;
	    }

	    return {
	        tags: tags,
	        ids: ids,
	        classes: classes
	    };
	}

	function buildIndex(data) {
	    var scopes = false;

	    if (data.scopes && Array.isArray(data.scopes)) {
	        scopes = Object.create(null);

	        for (var i = 0; i < data.scopes.length; i++) {
	            var list = data.scopes[i];

	            if (!list || !Array.isArray(list)) {
	                throw new Error('Wrong usage format');
	            }

	            for (var j = 0; j < list.length; j++) {
	                var name = list[j];

	                if (hasOwnProperty.call(scopes, name)) {
	                    throw new Error('Class can\'t be used for several scopes: ' + name);
	                }

	                scopes[name] = i + 1;
	            }
	        }
	    }

	    return {
	        whitelist: buildList(data),
	        blacklist: buildList(data.blacklist),
	        scopes: scopes
	    };
	}

	var usage = {
	    buildIndex: buildIndex
	};

	var utils = {
	    hasNoChildren: function(node) {
	        return !node || !node.children || node.children.isEmpty();
	    },
	    isNodeChildrenList: function(node, list) {
	        return node !== null && node.children === list;
	    }
	};

	var resolveKeyword = csstree_min.keyword;
	var { hasNoChildren } = utils;

	var Atrule = function cleanAtrule(node, item, list) {
	    if (node.block) {
	        // otherwise removed at-rule don't prevent @import for removal
	        if (this.stylesheet !== null) {
	            this.stylesheet.firstAtrulesAllowed = false;
	        }

	        if (hasNoChildren(node.block)) {
	            list.remove(item);
	            return;
	        }
	    }

	    switch (node.name) {
	        case 'charset':
	            if (hasNoChildren(node.prelude)) {
	                list.remove(item);
	                return;
	            }

	            // if there is any rule before @charset -> remove it
	            if (item.prev) {
	                list.remove(item);
	                return;
	            }

	            break;

	        case 'import':
	            if (this.stylesheet === null || !this.stylesheet.firstAtrulesAllowed) {
	                list.remove(item);
	                return;
	            }

	            // if there are some rules that not an @import or @charset before @import
	            // remove it
	            list.prevUntil(item.prev, function(rule) {
	                if (rule.type === 'Atrule') {
	                    if (rule.name === 'import' || rule.name === 'charset') {
	                        return;
	                    }
	                }

	                this.root.firstAtrulesAllowed = false;
	                list.remove(item);
	                return true;
	            }, this);

	            break;

	        default:
	            var name = resolveKeyword(node.name).basename;
	            if (name === 'keyframes' ||
	                name === 'media' ||
	                name === 'supports') {

	                // drop at-rule with no prelude
	                if (hasNoChildren(node.prelude) || hasNoChildren(node.block)) {
	                    list.remove(item);
	                }
	            }
	    }
	};

	var Comment = function cleanComment(data, item, list) {
	    list.remove(item);
	};

	var property = csstree_min.property;

	var Declaration = function cleanDeclartion(node, item, list) {
	    if (node.value.children && node.value.children.isEmpty()) {
	        list.remove(item);
	        return;
	    }

	    if (property(node.property).custom) {
	        if (/\S/.test(node.value.value)) {
	            node.value.value = node.value.value.trim();
	        }
	    }
	};

	var { isNodeChildrenList } = utils;

	var Raw = function cleanRaw(node, item, list) {
	    // raw in stylesheet or block children
	    if (isNodeChildrenList(this.stylesheet, list) ||
	        isNodeChildrenList(this.block, list)) {
	        list.remove(item);
	    }
	};

	var hasOwnProperty$1 = Object.prototype.hasOwnProperty;
	var walk = csstree_min.walk;
	var { hasNoChildren: hasNoChildren$1 } = utils;

	function cleanUnused(selectorList, usageData) {
	    selectorList.children.each(function(selector, item, list) {
	        var shouldRemove = false;

	        walk(selector, function(node) {
	            // ignore nodes in nested selectors
	            if (this.selector === null || this.selector === selectorList) {
	                switch (node.type) {
	                    case 'SelectorList':
	                        // TODO: remove toLowerCase when pseudo selectors will be normalized
	                        // ignore selectors inside :not()
	                        if (this.function === null || this.function.name.toLowerCase() !== 'not') {
	                            if (cleanUnused(node, usageData)) {
	                                shouldRemove = true;
	                            }
	                        }
	                        break;

	                    case 'ClassSelector':
	                        if (usageData.whitelist !== null &&
	                            usageData.whitelist.classes !== null &&
	                            !hasOwnProperty$1.call(usageData.whitelist.classes, node.name)) {
	                            shouldRemove = true;
	                        }
	                        if (usageData.blacklist !== null &&
	                            usageData.blacklist.classes !== null &&
	                            hasOwnProperty$1.call(usageData.blacklist.classes, node.name)) {
	                            shouldRemove = true;
	                        }
	                        break;

	                    case 'IdSelector':
	                        if (usageData.whitelist !== null &&
	                            usageData.whitelist.ids !== null &&
	                            !hasOwnProperty$1.call(usageData.whitelist.ids, node.name)) {
	                            shouldRemove = true;
	                        }
	                        if (usageData.blacklist !== null &&
	                            usageData.blacklist.ids !== null &&
	                            hasOwnProperty$1.call(usageData.blacklist.ids, node.name)) {
	                            shouldRemove = true;
	                        }
	                        break;

	                    case 'TypeSelector':
	                        // TODO: remove toLowerCase when type selectors will be normalized
	                        // ignore universal selectors
	                        if (node.name.charAt(node.name.length - 1) !== '*') {
	                            if (usageData.whitelist !== null &&
	                                usageData.whitelist.tags !== null &&
	                                !hasOwnProperty$1.call(usageData.whitelist.tags, node.name.toLowerCase())) {
	                                shouldRemove = true;
	                            }
	                            if (usageData.blacklist !== null &&
	                                usageData.blacklist.tags !== null &&
	                                hasOwnProperty$1.call(usageData.blacklist.tags, node.name.toLowerCase())) {
	                                shouldRemove = true;
	                            }
	                        }
	                        break;
	                }
	            }
	        });

	        if (shouldRemove) {
	            list.remove(item);
	        }
	    });

	    return selectorList.children.isEmpty();
	}

	var Rule = function cleanRule(node, item, list, options) {
	    if (hasNoChildren$1(node.prelude) || hasNoChildren$1(node.block)) {
	        list.remove(item);
	        return;
	    }

	    var usageData = options.usage;

	    if (usageData && (usageData.whitelist !== null || usageData.blacklist !== null)) {
	        cleanUnused(node.prelude, usageData);

	        if (hasNoChildren$1(node.prelude)) {
	            list.remove(item);
	            return;
	        }
	    }
	};

	// remove useless universal selector
	var TypeSelector = function cleanTypeSelector(node, item, list) {
	    var name = item.data.name;

	    // check it's a non-namespaced universal selector
	    if (name !== '*') {
	        return;
	    }

	    // remove when universal selector before other selectors
	    var nextType = item.next && item.next.data.type;
	    if (nextType === 'IdSelector' ||
	        nextType === 'ClassSelector' ||
	        nextType === 'AttributeSelector' ||
	        nextType === 'PseudoClassSelector' ||
	        nextType === 'PseudoElementSelector') {
	        list.remove(item);
	    }
	};

	var { isNodeChildrenList: isNodeChildrenList$1 } = utils;

	function isSafeOperator(node) {
	    return node.type === 'Operator' && node.value !== '+' && node.value !== '-';
	}

	var WhiteSpace = function cleanWhitespace(node, item, list) {
	    // remove when first or last item in sequence
	    if (item.next === null || item.prev === null) {
	        list.remove(item);
	        return;
	    }

	    // white space in stylesheet or block children
	    if (isNodeChildrenList$1(this.stylesheet, list) ||
	        isNodeChildrenList$1(this.block, list)) {
	        list.remove(item);
	        return;
	    }

	    if (item.next.data.type === 'WhiteSpace') {
	        list.remove(item);
	        return;
	    }

	    if (isSafeOperator(item.prev.data) || isSafeOperator(item.next.data)) {
	        list.remove(item);
	        return;
	    }
	};

	var walk$1 = csstree_min.walk;
	var handlers = {
	    Atrule: Atrule,
	    Comment: Comment,
	    Declaration: Declaration,
	    Raw: Raw,
	    Rule: Rule,
	    TypeSelector: TypeSelector,
	    WhiteSpace: WhiteSpace
	};

	var clean = function(ast, options) {
	    walk$1(ast, {
	        leave: function(node, item, list) {
	            if (handlers.hasOwnProperty(node.type)) {
	                handlers[node.type].call(this, node, item, list, options);
	            }
	        }
	    });
	};

	var keyframes = function(node) {
	    node.block.children.each(function(rule) {
	        rule.prelude.children.each(function(simpleselector) {
	            simpleselector.children.each(function(data, item) {
	                if (data.type === 'Percentage' && data.value === '100') {
	                    item.data = {
	                        type: 'TypeSelector',
	                        loc: data.loc,
	                        name: 'to'
	                    };
	                } else if (data.type === 'TypeSelector' && data.name === 'from') {
	                    item.data = {
	                        type: 'Percentage',
	                        loc: data.loc,
	                        value: '0'
	                    };
	                }
	            });
	        });
	    });
	};

	var resolveKeyword$1 = csstree_min.keyword;


	var Atrule$1 = function(node) {
	    // compress @keyframe selectors
	    if (resolveKeyword$1(node.name).basename === 'keyframes') {
	        keyframes(node);
	    }
	};

	// Can unquote attribute detection
	// Adopted implementation of Mathias Bynens
	// https://github.com/mathiasbynens/mothereff.in/blob/master/unquoted-attributes/eff.js
	var escapesRx = /\\([0-9A-Fa-f]{1,6})(\r\n|[ \t\n\f\r])?|\\./g;
	var blockUnquoteRx = /^(-?\d|--)|[\u0000-\u002c\u002e\u002f\u003A-\u0040\u005B-\u005E\u0060\u007B-\u009f]/;

	function canUnquote(value) {
	    if (value === '' || value === '-') {
	        return;
	    }

	    // Escapes are valid, so replace them with a valid non-empty string
	    value = value.replace(escapesRx, 'a');

	    return !blockUnquoteRx.test(value);
	}

	var AttributeSelector = function(node) {
	    var attrValue = node.value;

	    if (!attrValue || attrValue.type !== 'String') {
	        return;
	    }

	    var unquotedValue = attrValue.value.replace(/^(.)(.*)\1$/, '$2');
	    if (canUnquote(unquotedValue)) {
	        node.value = {
	            type: 'Identifier',
	            loc: attrValue.loc,
	            name: unquotedValue
	        };
	    }
	};

	var font = function compressFont(node) {
	    var list = node.children;

	    list.eachRight(function(node, item) {
	        if (node.type === 'Identifier') {
	            if (node.name === 'bold') {
	                item.data = {
	                    type: 'Number',
	                    loc: node.loc,
	                    value: '700'
	                };
	            } else if (node.name === 'normal') {
	                var prev = item.prev;

	                if (prev && prev.data.type === 'Operator' && prev.data.value === '/') {
	                    this.remove(prev);
	                }

	                this.remove(item);
	            } else if (node.name === 'medium') {
	                var next = item.next;

	                if (!next || next.data.type !== 'Operator') {
	                    this.remove(item);
	                }
	            }
	        }
	    });

	    // remove redundant spaces
	    list.each(function(node, item) {
	        if (node.type === 'WhiteSpace') {
	            if (!item.prev || !item.next || item.next.data.type === 'WhiteSpace') {
	                this.remove(item);
	            }
	        }
	    });

	    if (list.isEmpty()) {
	        list.insert(list.createItem({
	            type: 'Identifier',
	            name: 'normal'
	        }));
	    }
	};

	var fontWeight = function compressFontWeight(node) {
	    var value = node.children.head.data;

	    if (value.type === 'Identifier') {
	        switch (value.name) {
	            case 'normal':
	                node.children.head.data = {
	                    type: 'Number',
	                    loc: value.loc,
	                    value: '400'
	                };
	                break;
	            case 'bold':
	                node.children.head.data = {
	                    type: 'Number',
	                    loc: value.loc,
	                    value: '700'
	                };
	                break;
	        }
	    }
	};

	var List = csstree_min.List;

	var background = function compressBackground(node) {
	    function lastType() {
	        if (buffer.length) {
	            return buffer[buffer.length - 1].type;
	        }
	    }

	    function flush() {
	        if (lastType() === 'WhiteSpace') {
	            buffer.pop();
	        }

	        if (!buffer.length) {
	            buffer.unshift(
	                {
	                    type: 'Number',
	                    loc: null,
	                    value: '0'
	                },
	                {
	                    type: 'WhiteSpace',
	                    value: ' '
	                },
	                {
	                    type: 'Number',
	                    loc: null,
	                    value: '0'
	                }
	            );
	        }

	        newValue.push.apply(newValue, buffer);

	        buffer = [];
	    }

	    var newValue = [];
	    var buffer = [];

	    node.children.each(function(node) {
	        if (node.type === 'Operator' && node.value === ',') {
	            flush();
	            newValue.push(node);
	            return;
	        }

	        // remove defaults
	        if (node.type === 'Identifier') {
	            if (node.name === 'transparent' ||
	                node.name === 'none' ||
	                node.name === 'repeat' ||
	                node.name === 'scroll') {
	                return;
	            }
	        }

	        // don't add redundant spaces
	        if (node.type === 'WhiteSpace' && (!buffer.length || lastType() === 'WhiteSpace')) {
	            return;
	        }

	        buffer.push(node);
	    });

	    flush();
	    node.children = new List().fromArray(newValue);
	};

	function removeItemAndRedundantWhiteSpace(list, item) {
	    var prev = item.prev;
	    var next = item.next;

	    if (next !== null) {
	        if (next.data.type === 'WhiteSpace' && (prev === null || prev.data.type === 'WhiteSpace')) {
	            list.remove(next);
	        }
	    } else if (prev !== null && prev.data.type === 'WhiteSpace') {
	        list.remove(prev);
	    }

	    list.remove(item);
	}

	var border = function compressBorder(node) {
	    node.children.each(function(node, item, list) {
	        if (node.type === 'Identifier' && node.name.toLowerCase() === 'none') {
	            if (list.head === list.tail) {
	                // replace `none` for zero when `none` is a single term
	                item.data = {
	                    type: 'Number',
	                    loc: node.loc,
	                    value: '0'
	                };
	            } else {
	                removeItemAndRedundantWhiteSpace(list, item);
	            }
	        }
	    });
	};

	var resolveName = csstree_min.property;
	var handlers$1 = {
	    'font': font,
	    'font-weight': fontWeight,
	    'background': background,
	    'border': border,
	    'outline': border
	};

	var Value = function compressValue(node) {
	    if (!this.declaration) {
	        return;
	    }

	    var property = resolveName(this.declaration.property);

	    if (handlers$1.hasOwnProperty(property.basename)) {
	        handlers$1[property.basename](node);
	    }
	};

	var OMIT_PLUSSIGN = /^(?:\+|(-))?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/;
	var KEEP_PLUSSIGN = /^([\+\-])?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/;
	var unsafeToRemovePlusSignAfter = {
	    Dimension: true,
	    Hash: true,
	    Identifier: true,
	    Number: true,
	    Raw: true,
	    UnicodeRange: true
	};

	function packNumber(value, item) {
	    // omit plus sign only if no prev or prev is safe type
	    var regexp = item && item.prev !== null && unsafeToRemovePlusSignAfter.hasOwnProperty(item.prev.data.type)
	        ? KEEP_PLUSSIGN
	        : OMIT_PLUSSIGN;

	    // 100 -> '100'
	    // 00100 -> '100'
	    // +100 -> '100' (only when safe, e.g. omitting plus sign for 1px+1px leads to single dimension instead of two)
	    // -100 -> '-100'
	    // 0.123 -> '.123'
	    // 0.12300 -> '.123'
	    // 0.0 -> ''
	    // 0 -> ''
	    // -0 -> '-'
	    value = String(value).replace(regexp, '$1$2$3');

	    if (value === '' || value === '-') {
	        value = '0';
	    }

	    return value;
	}

	var _Number = function(node, item) {
	    node.value = packNumber(node.value, item);
	};
	var pack = packNumber;
	_Number.pack = pack;

	var packNumber$1 = _Number.pack;
	var MATH_FUNCTIONS = {
	    'calc': true,
	    'min': true,
	    'max': true,
	    'clamp': true
	};
	var LENGTH_UNIT = {
	    // absolute length units
	    'px': true,
	    'mm': true,
	    'cm': true,
	    'in': true,
	    'pt': true,
	    'pc': true,

	    // relative length units
	    'em': true,
	    'ex': true,
	    'ch': true,
	    'rem': true,

	    // viewport-percentage lengths
	    'vh': true,
	    'vw': true,
	    'vmin': true,
	    'vmax': true,
	    'vm': true
	};

	var Dimension = function compressDimension(node, item) {
	    var value = packNumber$1(node.value, item);

	    node.value = value;

	    if (value === '0' && this.declaration !== null && this.atrulePrelude === null) {
	        var unit = node.unit.toLowerCase();

	        // only length values can be compressed
	        if (!LENGTH_UNIT.hasOwnProperty(unit)) {
	            return;
	        }

	        // issue #362: shouldn't remove unit in -ms-flex since it breaks flex in IE10/11
	        // issue #200: shouldn't remove unit in flex since it breaks flex in IE10/11
	        if (this.declaration.property === '-ms-flex' ||
	            this.declaration.property === 'flex') {
	            return;
	        }

	        // issue #222: don't remove units inside calc
	        if (this.function && MATH_FUNCTIONS.hasOwnProperty(this.function.name)) {
	            return;
	        }

	        item.data = {
	            type: 'Number',
	            loc: node.loc,
	            value: value
	        };
	    }
	};

	var lexer = csstree_min.lexer;
	var packNumber$2 = _Number.pack;
	var blacklist = new Set([
	    // see https://github.com/jakubpawlowicz/clean-css/issues/957
	    'width',
	    'min-width',
	    'max-width',
	    'height',
	    'min-height',
	    'max-height',

	    // issue #410: Don’t remove units in flex-basis value for (-ms-)flex shorthand
	    // issue #362: shouldn't remove unit in -ms-flex since it breaks flex in IE10/11
	    // issue #200: shouldn't remove unit in flex since it breaks flex in IE10/11
	    'flex',
	    '-ms-flex'
	]);

	var Percentage = function compressPercentage(node, item) {
	    node.value = packNumber$2(node.value, item);

	    if (node.value === '0' && this.declaration && !blacklist.has(this.declaration.property)) {
	        // try to convert a number
	        item.data = {
	            type: 'Number',
	            loc: node.loc,
	            value: node.value
	        };

	        // that's ok only when new value matches on length
	        if (!lexer.matchDeclaration(this.declaration).isType(item.data, 'length')) {
	            // otherwise rollback changes
	            item.data = node;
	        }
	    }
	};

	var _String = function(node) {
	    var value = node.value;

	    // remove escaped newlines, i.e.
	    // .a { content: "foo\
	    // bar"}
	    // ->
	    // .a { content: "foobar" }
	    value = value.replace(/\\(\r\n|\r|\n|\f)/g, '');

	    node.value = value;
	};

	var UNICODE = '\\\\[0-9a-f]{1,6}(\\r\\n|[ \\n\\r\\t\\f])?';
	var ESCAPE = '(' + UNICODE + '|\\\\[^\\n\\r\\f0-9a-fA-F])';
	var NONPRINTABLE = '\u0000\u0008\u000b\u000e-\u001f\u007f';
	var SAFE_URL = new RegExp('^(' + ESCAPE + '|[^\"\'\\(\\)\\\\\\s' + NONPRINTABLE + '])*$', 'i');

	var Url = function(node) {
	    var value = node.value;

	    if (value.type !== 'String') {
	        return;
	    }

	    var quote = value.value[0];
	    var url = value.value.substr(1, value.value.length - 2);

	    // convert `\\` to `/`
	    url = url.replace(/\\\\/g, '/');

	    // remove quotes when safe
	    // https://www.w3.org/TR/css-syntax-3/#url-unquoted-diagram
	    if (SAFE_URL.test(url)) {
	        node.value = {
	            type: 'Raw',
	            loc: node.value.loc,
	            value: url
	        };
	    } else {
	        // use double quotes if string has no double quotes
	        // otherwise use original quotes
	        // TODO: make better quote type selection
	        node.value.value = url.indexOf('"') === -1 ? '"' + url + '"' : quote + url + quote;
	    }
	};

	var lexer$1 = csstree_min.lexer;
	var packNumber$3 = _Number.pack;

	// http://www.w3.org/TR/css3-color/#svg-color
	var NAME_TO_HEX = {
	    'aliceblue': 'f0f8ff',
	    'antiquewhite': 'faebd7',
	    'aqua': '0ff',
	    'aquamarine': '7fffd4',
	    'azure': 'f0ffff',
	    'beige': 'f5f5dc',
	    'bisque': 'ffe4c4',
	    'black': '000',
	    'blanchedalmond': 'ffebcd',
	    'blue': '00f',
	    'blueviolet': '8a2be2',
	    'brown': 'a52a2a',
	    'burlywood': 'deb887',
	    'cadetblue': '5f9ea0',
	    'chartreuse': '7fff00',
	    'chocolate': 'd2691e',
	    'coral': 'ff7f50',
	    'cornflowerblue': '6495ed',
	    'cornsilk': 'fff8dc',
	    'crimson': 'dc143c',
	    'cyan': '0ff',
	    'darkblue': '00008b',
	    'darkcyan': '008b8b',
	    'darkgoldenrod': 'b8860b',
	    'darkgray': 'a9a9a9',
	    'darkgrey': 'a9a9a9',
	    'darkgreen': '006400',
	    'darkkhaki': 'bdb76b',
	    'darkmagenta': '8b008b',
	    'darkolivegreen': '556b2f',
	    'darkorange': 'ff8c00',
	    'darkorchid': '9932cc',
	    'darkred': '8b0000',
	    'darksalmon': 'e9967a',
	    'darkseagreen': '8fbc8f',
	    'darkslateblue': '483d8b',
	    'darkslategray': '2f4f4f',
	    'darkslategrey': '2f4f4f',
	    'darkturquoise': '00ced1',
	    'darkviolet': '9400d3',
	    'deeppink': 'ff1493',
	    'deepskyblue': '00bfff',
	    'dimgray': '696969',
	    'dimgrey': '696969',
	    'dodgerblue': '1e90ff',
	    'firebrick': 'b22222',
	    'floralwhite': 'fffaf0',
	    'forestgreen': '228b22',
	    'fuchsia': 'f0f',
	    'gainsboro': 'dcdcdc',
	    'ghostwhite': 'f8f8ff',
	    'gold': 'ffd700',
	    'goldenrod': 'daa520',
	    'gray': '808080',
	    'grey': '808080',
	    'green': '008000',
	    'greenyellow': 'adff2f',
	    'honeydew': 'f0fff0',
	    'hotpink': 'ff69b4',
	    'indianred': 'cd5c5c',
	    'indigo': '4b0082',
	    'ivory': 'fffff0',
	    'khaki': 'f0e68c',
	    'lavender': 'e6e6fa',
	    'lavenderblush': 'fff0f5',
	    'lawngreen': '7cfc00',
	    'lemonchiffon': 'fffacd',
	    'lightblue': 'add8e6',
	    'lightcoral': 'f08080',
	    'lightcyan': 'e0ffff',
	    'lightgoldenrodyellow': 'fafad2',
	    'lightgray': 'd3d3d3',
	    'lightgrey': 'd3d3d3',
	    'lightgreen': '90ee90',
	    'lightpink': 'ffb6c1',
	    'lightsalmon': 'ffa07a',
	    'lightseagreen': '20b2aa',
	    'lightskyblue': '87cefa',
	    'lightslategray': '789',
	    'lightslategrey': '789',
	    'lightsteelblue': 'b0c4de',
	    'lightyellow': 'ffffe0',
	    'lime': '0f0',
	    'limegreen': '32cd32',
	    'linen': 'faf0e6',
	    'magenta': 'f0f',
	    'maroon': '800000',
	    'mediumaquamarine': '66cdaa',
	    'mediumblue': '0000cd',
	    'mediumorchid': 'ba55d3',
	    'mediumpurple': '9370db',
	    'mediumseagreen': '3cb371',
	    'mediumslateblue': '7b68ee',
	    'mediumspringgreen': '00fa9a',
	    'mediumturquoise': '48d1cc',
	    'mediumvioletred': 'c71585',
	    'midnightblue': '191970',
	    'mintcream': 'f5fffa',
	    'mistyrose': 'ffe4e1',
	    'moccasin': 'ffe4b5',
	    'navajowhite': 'ffdead',
	    'navy': '000080',
	    'oldlace': 'fdf5e6',
	    'olive': '808000',
	    'olivedrab': '6b8e23',
	    'orange': 'ffa500',
	    'orangered': 'ff4500',
	    'orchid': 'da70d6',
	    'palegoldenrod': 'eee8aa',
	    'palegreen': '98fb98',
	    'paleturquoise': 'afeeee',
	    'palevioletred': 'db7093',
	    'papayawhip': 'ffefd5',
	    'peachpuff': 'ffdab9',
	    'peru': 'cd853f',
	    'pink': 'ffc0cb',
	    'plum': 'dda0dd',
	    'powderblue': 'b0e0e6',
	    'purple': '800080',
	    'rebeccapurple': '639',
	    'red': 'f00',
	    'rosybrown': 'bc8f8f',
	    'royalblue': '4169e1',
	    'saddlebrown': '8b4513',
	    'salmon': 'fa8072',
	    'sandybrown': 'f4a460',
	    'seagreen': '2e8b57',
	    'seashell': 'fff5ee',
	    'sienna': 'a0522d',
	    'silver': 'c0c0c0',
	    'skyblue': '87ceeb',
	    'slateblue': '6a5acd',
	    'slategray': '708090',
	    'slategrey': '708090',
	    'snow': 'fffafa',
	    'springgreen': '00ff7f',
	    'steelblue': '4682b4',
	    'tan': 'd2b48c',
	    'teal': '008080',
	    'thistle': 'd8bfd8',
	    'tomato': 'ff6347',
	    'turquoise': '40e0d0',
	    'violet': 'ee82ee',
	    'wheat': 'f5deb3',
	    'white': 'fff',
	    'whitesmoke': 'f5f5f5',
	    'yellow': 'ff0',
	    'yellowgreen': '9acd32'
	};

	var HEX_TO_NAME = {
	    '800000': 'maroon',
	    '800080': 'purple',
	    '808000': 'olive',
	    '808080': 'gray',
	    '00ffff': 'cyan',
	    'f0ffff': 'azure',
	    'f5f5dc': 'beige',
	    'ffe4c4': 'bisque',
	    '000000': 'black',
	    '0000ff': 'blue',
	    'a52a2a': 'brown',
	    'ff7f50': 'coral',
	    'ffd700': 'gold',
	    '008000': 'green',
	    '4b0082': 'indigo',
	    'fffff0': 'ivory',
	    'f0e68c': 'khaki',
	    '00ff00': 'lime',
	    'faf0e6': 'linen',
	    '000080': 'navy',
	    'ffa500': 'orange',
	    'da70d6': 'orchid',
	    'cd853f': 'peru',
	    'ffc0cb': 'pink',
	    'dda0dd': 'plum',
	    'f00': 'red',
	    'ff0000': 'red',
	    'fa8072': 'salmon',
	    'a0522d': 'sienna',
	    'c0c0c0': 'silver',
	    'fffafa': 'snow',
	    'd2b48c': 'tan',
	    '008080': 'teal',
	    'ff6347': 'tomato',
	    'ee82ee': 'violet',
	    'f5deb3': 'wheat',
	    'ffffff': 'white',
	    'ffff00': 'yellow'
	};

	function hueToRgb(p, q, t) {
	    if (t < 0) {
	        t += 1;
	    }
	    if (t > 1) {
	        t -= 1;
	    }
	    if (t < 1 / 6) {
	        return p + (q - p) * 6 * t;
	    }
	    if (t < 1 / 2) {
	        return q;
	    }
	    if (t < 2 / 3) {
	        return p + (q - p) * (2 / 3 - t) * 6;
	    }
	    return p;
	}

	function hslToRgb(h, s, l, a) {
	    var r;
	    var g;
	    var b;

	    if (s === 0) {
	        r = g = b = l; // achromatic
	    } else {
	        var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
	        var p = 2 * l - q;

	        r = hueToRgb(p, q, h + 1 / 3);
	        g = hueToRgb(p, q, h);
	        b = hueToRgb(p, q, h - 1 / 3);
	    }

	    return [
	        Math.round(r * 255),
	        Math.round(g * 255),
	        Math.round(b * 255),
	        a
	    ];
	}

	function toHex(value) {
	    value = value.toString(16);
	    return value.length === 1 ? '0' + value : value;
	}

	function parseFunctionArgs(functionArgs, count, rgb) {
	    var cursor = functionArgs.head;
	    var args = [];
	    var wasValue = false;

	    while (cursor !== null) {
	        var node = cursor.data;
	        var type = node.type;

	        switch (type) {
	            case 'Number':
	            case 'Percentage':
	                if (wasValue) {
	                    return;
	                }

	                wasValue = true;
	                args.push({
	                    type: type,
	                    value: Number(node.value)
	                });
	                break;

	            case 'Operator':
	                if (node.value === ',') {
	                    if (!wasValue) {
	                        return;
	                    }
	                    wasValue = false;
	                } else if (wasValue || node.value !== '+') {
	                    return;
	                }
	                break;

	            default:
	                // something we couldn't understand
	                return;
	        }

	        cursor = cursor.next;
	    }

	    if (args.length !== count) {
	        // invalid arguments count
	        // TODO: remove those tokens
	        return;
	    }

	    if (args.length === 4) {
	        if (args[3].type !== 'Number') {
	            // 4th argument should be a number
	            // TODO: remove those tokens
	            return;
	        }

	        args[3].type = 'Alpha';
	    }

	    if (rgb) {
	        if (args[0].type !== args[1].type || args[0].type !== args[2].type) {
	            // invalid color, numbers and percentage shouldn't be mixed
	            // TODO: remove those tokens
	            return;
	        }
	    } else {
	        if (args[0].type !== 'Number' ||
	            args[1].type !== 'Percentage' ||
	            args[2].type !== 'Percentage') {
	            // invalid color, for hsl values should be: number, percentage, percentage
	            // TODO: remove those tokens
	            return;
	        }

	        args[0].type = 'Angle';
	    }

	    return args.map(function(arg) {
	        var value = Math.max(0, arg.value);

	        switch (arg.type) {
	            case 'Number':
	                // fit value to [0..255] range
	                value = Math.min(value, 255);
	                break;

	            case 'Percentage':
	                // convert 0..100% to value in [0..255] range
	                value = Math.min(value, 100) / 100;

	                if (!rgb) {
	                    return value;
	                }

	                value = 255 * value;
	                break;

	            case 'Angle':
	                // fit value to (-360..360) range
	                return (((value % 360) + 360) % 360) / 360;

	            case 'Alpha':
	                // fit value to [0..1] range
	                return Math.min(value, 1);
	        }

	        return Math.round(value);
	    });
	}

	function compressFunction(node, item, list) {
	    var functionName = node.name;
	    var args;

	    if (functionName === 'rgba' || functionName === 'hsla') {
	        args = parseFunctionArgs(node.children, 4, functionName === 'rgba');

	        if (!args) {
	            // something went wrong
	            return;
	        }

	        if (functionName === 'hsla') {
	            args = hslToRgb.apply(null, args);
	            node.name = 'rgba';
	        }

	        if (args[3] === 0) {
	            // try to replace `rgba(x, x, x, 0)` to `transparent`
	            // always replace `rgba(0, 0, 0, 0)` to `transparent`
	            // otherwise avoid replacement in gradients since it may break color transition
	            // http://stackoverflow.com/questions/11829410/css3-gradient-rendering-issues-from-transparent-to-white
	            var scopeFunctionName = this.function && this.function.name;
	            if ((args[0] === 0 && args[1] === 0 && args[2] === 0) ||
	                !/^(?:to|from|color-stop)$|gradient$/i.test(scopeFunctionName)) {

	                item.data = {
	                    type: 'Identifier',
	                    loc: node.loc,
	                    name: 'transparent'
	                };

	                return;
	            }
	        }

	        if (args[3] !== 1) {
	            // replace argument values for normalized/interpolated
	            node.children.each(function(node, item, list) {
	                if (node.type === 'Operator') {
	                    if (node.value !== ',') {
	                        list.remove(item);
	                    }
	                    return;
	                }

	                item.data = {
	                    type: 'Number',
	                    loc: node.loc,
	                    value: packNumber$3(args.shift(), null)
	                };
	            });

	            return;
	        }

	        // otherwise convert to rgb, i.e. rgba(255, 0, 0, 1) -> rgb(255, 0, 0)
	        functionName = 'rgb';
	    }

	    if (functionName === 'hsl') {
	        args = args || parseFunctionArgs(node.children, 3, false);

	        if (!args) {
	            // something went wrong
	            return;
	        }

	        // convert to rgb
	        args = hslToRgb.apply(null, args);
	        functionName = 'rgb';
	    }

	    if (functionName === 'rgb') {
	        args = args || parseFunctionArgs(node.children, 3, true);

	        if (!args) {
	            // something went wrong
	            return;
	        }

	        // check if color is not at the end and not followed by space
	        var next = item.next;
	        if (next && next.data.type !== 'WhiteSpace') {
	            list.insert(list.createItem({
	                type: 'WhiteSpace',
	                value: ' '
	            }), next);
	        }

	        item.data = {
	            type: 'Hash',
	            loc: node.loc,
	            value: toHex(args[0]) + toHex(args[1]) + toHex(args[2])
	        };

	        compressHex(item.data, item);
	    }
	}

	function compressIdent(node, item) {
	    if (this.declaration === null) {
	        return;
	    }

	    var color = node.name.toLowerCase();

	    if (NAME_TO_HEX.hasOwnProperty(color) &&
	        lexer$1.matchDeclaration(this.declaration).isType(node, 'color')) {
	        var hex = NAME_TO_HEX[color];

	        if (hex.length + 1 <= color.length) {
	            // replace for shorter hex value
	            item.data = {
	                type: 'Hash',
	                loc: node.loc,
	                value: hex
	            };
	        } else {
	            // special case for consistent colors
	            if (color === 'grey') {
	                color = 'gray';
	            }

	            // just replace value for lower cased name
	            node.name = color;
	        }
	    }
	}

	function compressHex(node, item) {
	    var color = node.value.toLowerCase();

	    // #112233 -> #123
	    if (color.length === 6 &&
	        color[0] === color[1] &&
	        color[2] === color[3] &&
	        color[4] === color[5]) {
	        color = color[0] + color[2] + color[4];
	    }

	    if (HEX_TO_NAME[color]) {
	        item.data = {
	            type: 'Identifier',
	            loc: node.loc,
	            name: HEX_TO_NAME[color]
	        };
	    } else {
	        node.value = color;
	    }
	}

	var color = {
	    compressFunction: compressFunction,
	    compressIdent: compressIdent,
	    compressHex: compressHex
	};

	var walk$2 = csstree_min.walk;
	var handlers$2 = {
	    Atrule: Atrule$1,
	    AttributeSelector: AttributeSelector,
	    Value: Value,
	    Dimension: Dimension,
	    Percentage: Percentage,
	    Number: _Number,
	    String: _String,
	    Url: Url,
	    Hash: color.compressHex,
	    Identifier: color.compressIdent,
	    Function: color.compressFunction
	};

	var replace = function(ast) {
	    walk$2(ast, {
	        leave: function(node, item, list) {
	            if (handlers$2.hasOwnProperty(node.type)) {
	                handlers$2[node.type].call(this, node, item, list);
	            }
	        }
	    });
	};

	var generate = csstree_min.generate;

	function Index() {
	    this.seed = 0;
	    this.map = Object.create(null);
	}

	Index.prototype.resolve = function(str) {
	    var index = this.map[str];

	    if (!index) {
	        index = ++this.seed;
	        this.map[str] = index;
	    }

	    return index;
	};

	var createDeclarationIndexer = function createDeclarationIndexer() {
	    var ids = new Index();

	    return function markDeclaration(node) {
	        var id = generate(node);

	        node.id = ids.resolve(id);
	        node.length = id.length;
	        node.fingerprint = null;

	        return node;
	    };
	};

	var specificity = function specificity(simpleSelector) {
	    var A = 0;
	    var B = 0;
	    var C = 0;

	    simpleSelector.children.each(function walk(node) {
	        switch (node.type) {
	            case 'SelectorList':
	            case 'Selector':
	                node.children.each(walk);
	                break;

	            case 'IdSelector':
	                A++;
	                break;

	            case 'ClassSelector':
	            case 'AttributeSelector':
	                B++;
	                break;

	            case 'PseudoClassSelector':
	                switch (node.name.toLowerCase()) {
	                    case 'not':
	                        node.children.each(walk);
	                        break;

	                    case 'before':
	                    case 'after':
	                    case 'first-line':
	                    case 'first-letter':
	                        C++;
	                        break;

	                    // TODO: support for :nth-*(.. of <SelectorList>), :matches(), :has()
	                    default:
	                        B++;
	                }
	                break;

	            case 'PseudoElementSelector':
	                C++;
	                break;

	            case 'TypeSelector':
	                // ignore universal selector
	                if (node.name.charAt(node.name.length - 1) !== '*') {
	                    C++;
	                }
	                break;

	        }
	    });

	    return [A, B, C];
	};

	var generate$1 = csstree_min.generate;


	var nonFreezePseudoElements = {
	    'first-letter': true,
	    'first-line': true,
	    'after': true,
	    'before': true
	};
	var nonFreezePseudoClasses = {
	    'link': true,
	    'visited': true,
	    'hover': true,
	    'active': true,
	    'first-letter': true,
	    'first-line': true,
	    'after': true,
	    'before': true
	};

	var processSelector = function freeze(node, usageData) {
	    var pseudos = Object.create(null);
	    var hasPseudo = false;

	    node.prelude.children.each(function(simpleSelector) {
	        var tagName = '*';
	        var scope = 0;

	        simpleSelector.children.each(function(node) {
	            switch (node.type) {
	                case 'ClassSelector':
	                    if (usageData && usageData.scopes) {
	                        var classScope = usageData.scopes[node.name] || 0;

	                        if (scope !== 0 && classScope !== scope) {
	                            throw new Error('Selector can\'t has classes from different scopes: ' + generate$1(simpleSelector));
	                        }

	                        scope = classScope;
	                    }
	                    break;

	                case 'PseudoClassSelector':
	                    var name = node.name.toLowerCase();

	                    if (!nonFreezePseudoClasses.hasOwnProperty(name)) {
	                        pseudos[':' + name] = true;
	                        hasPseudo = true;
	                    }
	                    break;

	                case 'PseudoElementSelector':
	                    var name = node.name.toLowerCase();

	                    if (!nonFreezePseudoElements.hasOwnProperty(name)) {
	                        pseudos['::' + name] = true;
	                        hasPseudo = true;
	                    }
	                    break;

	                case 'TypeSelector':
	                    tagName = node.name.toLowerCase();
	                    break;

	                case 'AttributeSelector':
	                    if (node.flags) {
	                        pseudos['[' + node.flags.toLowerCase() + ']'] = true;
	                        hasPseudo = true;
	                    }
	                    break;

	                case 'WhiteSpace':
	                case 'Combinator':
	                    tagName = '*';
	                    break;
	            }
	        });

	        simpleSelector.compareMarker = specificity(simpleSelector).toString();
	        simpleSelector.id = null; // pre-init property to avoid multiple hidden class
	        simpleSelector.id = generate$1(simpleSelector);

	        if (scope) {
	            simpleSelector.compareMarker += ':' + scope;
	        }

	        if (tagName !== '*') {
	            simpleSelector.compareMarker += ',' + tagName;
	        }
	    });

	    // add property to all rule nodes to avoid multiple hidden class
	    node.pseudoSignature = hasPseudo && Object.keys(pseudos).sort().join(',');
	};

	var resolveKeyword$2 = csstree_min.keyword;
	var walk$3 = csstree_min.walk;
	var generate$2 = csstree_min.generate;



	var prepare = function prepare(ast, options) {
	    var markDeclaration = createDeclarationIndexer();

	    walk$3(ast, {
	        visit: 'Rule',
	        enter: function processRule(node) {
	            node.block.children.each(markDeclaration);
	            processSelector(node, options.usage);
	        }
	    });

	    walk$3(ast, {
	        visit: 'Atrule',
	        enter: function(node) {
	            if (node.prelude) {
	                node.prelude.id = null; // pre-init property to avoid multiple hidden class for generate
	                node.prelude.id = generate$2(node.prelude);
	            }

	            // compare keyframe selectors by its values
	            // NOTE: still no clarification about problems with keyframes selector grouping (issue #197)
	            if (resolveKeyword$2(node.name).basename === 'keyframes') {
	                node.block.avoidRulesMerge = true;  /* probably we don't need to prevent those merges for @keyframes
	                                                       TODO: need to be checked */
	                node.block.children.each(function(rule) {
	                    rule.prelude.children.each(function(simpleselector) {
	                        simpleselector.compareMarker = simpleselector.id;
	                    });
	                });
	            }
	        }
	    });

	    return {
	        declaration: markDeclaration
	    };
	};

	var List$1 = csstree_min.List;
	var resolveKeyword$3 = csstree_min.keyword;
	var hasOwnProperty$2 = Object.prototype.hasOwnProperty;
	var walk$4 = csstree_min.walk;

	function addRuleToMap(map, item, list, single) {
	    var node = item.data;
	    var name = resolveKeyword$3(node.name).basename;
	    var id = node.name.toLowerCase() + '/' + (node.prelude ? node.prelude.id : null);

	    if (!hasOwnProperty$2.call(map, name)) {
	        map[name] = Object.create(null);
	    }

	    if (single) {
	        delete map[name][id];
	    }

	    if (!hasOwnProperty$2.call(map[name], id)) {
	        map[name][id] = new List$1();
	    }

	    map[name][id].append(list.remove(item));
	}

	function relocateAtrules(ast, options) {
	    var collected = Object.create(null);
	    var topInjectPoint = null;

	    ast.children.each(function(node, item, list) {
	        if (node.type === 'Atrule') {
	            var name = resolveKeyword$3(node.name).basename;

	            switch (name) {
	                case 'keyframes':
	                    addRuleToMap(collected, item, list, true);
	                    return;

	                case 'media':
	                    if (options.forceMediaMerge) {
	                        addRuleToMap(collected, item, list, false);
	                        return;
	                    }
	                    break;
	            }

	            if (topInjectPoint === null &&
	                name !== 'charset' &&
	                name !== 'import') {
	                topInjectPoint = item;
	            }
	        } else {
	            if (topInjectPoint === null) {
	                topInjectPoint = item;
	            }
	        }
	    });

	    for (var atrule in collected) {
	        for (var id in collected[atrule]) {
	            ast.children.insertList(
	                collected[atrule][id],
	                atrule === 'media' ? null : topInjectPoint
	            );
	        }
	    }
	}
	function isMediaRule(node) {
	    return node.type === 'Atrule' && node.name === 'media';
	}

	function processAtrule(node, item, list) {
	    if (!isMediaRule(node)) {
	        return;
	    }

	    var prev = item.prev && item.prev.data;

	    if (!prev || !isMediaRule(prev)) {
	        return;
	    }

	    // merge @media with same query
	    if (node.prelude &&
	        prev.prelude &&
	        node.prelude.id === prev.prelude.id) {
	        prev.block.children.appendList(node.block.children);
	        list.remove(item);

	        // TODO: use it when we can refer to several points in source
	        // prev.loc = {
	        //     primary: prev.loc,
	        //     merged: node.loc
	        // };
	    }
	}

	var _1MergeAtrule = function rejoinAtrule(ast, options) {
	    relocateAtrules(ast, options);

	    walk$4(ast, {
	        visit: 'Atrule',
	        reverse: true,
	        enter: processAtrule
	    });
	};

	var hasOwnProperty$3 = Object.prototype.hasOwnProperty;

	function isEqualSelectors(a, b) {
	    var cursor1 = a.head;
	    var cursor2 = b.head;

	    while (cursor1 !== null && cursor2 !== null && cursor1.data.id === cursor2.data.id) {
	        cursor1 = cursor1.next;
	        cursor2 = cursor2.next;
	    }

	    return cursor1 === null && cursor2 === null;
	}

	function isEqualDeclarations(a, b) {
	    var cursor1 = a.head;
	    var cursor2 = b.head;

	    while (cursor1 !== null && cursor2 !== null && cursor1.data.id === cursor2.data.id) {
	        cursor1 = cursor1.next;
	        cursor2 = cursor2.next;
	    }

	    return cursor1 === null && cursor2 === null;
	}

	function compareDeclarations(declarations1, declarations2) {
	    var result = {
	        eq: [],
	        ne1: [],
	        ne2: [],
	        ne2overrided: []
	    };

	    var fingerprints = Object.create(null);
	    var declarations2hash = Object.create(null);

	    for (var cursor = declarations2.head; cursor; cursor = cursor.next)  {
	        declarations2hash[cursor.data.id] = true;
	    }

	    for (var cursor = declarations1.head; cursor; cursor = cursor.next)  {
	        var data = cursor.data;

	        if (data.fingerprint) {
	            fingerprints[data.fingerprint] = data.important;
	        }

	        if (declarations2hash[data.id]) {
	            declarations2hash[data.id] = false;
	            result.eq.push(data);
	        } else {
	            result.ne1.push(data);
	        }
	    }

	    for (var cursor = declarations2.head; cursor; cursor = cursor.next)  {
	        var data = cursor.data;

	        if (declarations2hash[data.id]) {
	            // when declarations1 has an overriding declaration, this is not a difference
	            // unless no !important is used on prev and !important is used on the following
	            if (!hasOwnProperty$3.call(fingerprints, data.fingerprint) ||
	                (!fingerprints[data.fingerprint] && data.important)) {
	                result.ne2.push(data);
	            }

	            result.ne2overrided.push(data);
	        }
	    }

	    return result;
	}

	function addSelectors(dest, source) {
	    source.each(function(sourceData) {
	        var newStr = sourceData.id;
	        var cursor = dest.head;

	        while (cursor) {
	            var nextStr = cursor.data.id;

	            if (nextStr === newStr) {
	                return;
	            }

	            if (nextStr > newStr) {
	                break;
	            }

	            cursor = cursor.next;
	        }

	        dest.insert(dest.createItem(sourceData), cursor);
	    });

	    return dest;
	}

	// check if simpleselectors has no equal specificity and element selector
	function hasSimilarSelectors(selectors1, selectors2) {
	    var cursor1 = selectors1.head;

	    while (cursor1 !== null) {
	        var cursor2 = selectors2.head;

	        while (cursor2 !== null) {
	            if (cursor1.data.compareMarker === cursor2.data.compareMarker) {
	                return true;
	            }

	            cursor2 = cursor2.next;
	        }

	        cursor1 = cursor1.next;
	    }

	    return false;
	}

	// test node can't to be skipped
	function unsafeToSkipNode(node) {
	    switch (node.type) {
	        case 'Rule':
	            // unsafe skip ruleset with selector similarities
	            return hasSimilarSelectors(node.prelude.children, this);

	        case 'Atrule':
	            // can skip at-rules with blocks
	            if (node.block) {
	                // unsafe skip at-rule if block contains something unsafe to skip
	                return node.block.children.some(unsafeToSkipNode, this);
	            }
	            break;

	        case 'Declaration':
	            return false;
	    }

	    // unsafe by default
	    return true;
	}

	var utils$1 = {
	    isEqualSelectors: isEqualSelectors,
	    isEqualDeclarations: isEqualDeclarations,
	    compareDeclarations: compareDeclarations,
	    addSelectors: addSelectors,
	    hasSimilarSelectors: hasSimilarSelectors,
	    unsafeToSkipNode: unsafeToSkipNode
	};

	var walk$5 = csstree_min.walk;


	function processRule(node, item, list) {
	    var selectors = node.prelude.children;
	    var declarations = node.block.children;

	    list.prevUntil(item.prev, function(prev) {
	        // skip non-ruleset node if safe
	        if (prev.type !== 'Rule') {
	            return utils$1.unsafeToSkipNode.call(selectors, prev);
	        }

	        var prevSelectors = prev.prelude.children;
	        var prevDeclarations = prev.block.children;

	        // try to join rulesets with equal pseudo signature
	        if (node.pseudoSignature === prev.pseudoSignature) {
	            // try to join by selectors
	            if (utils$1.isEqualSelectors(prevSelectors, selectors)) {
	                prevDeclarations.appendList(declarations);
	                list.remove(item);
	                return true;
	            }

	            // try to join by declarations
	            if (utils$1.isEqualDeclarations(declarations, prevDeclarations)) {
	                utils$1.addSelectors(prevSelectors, selectors);
	                list.remove(item);
	                return true;
	            }
	        }

	        // go to prev ruleset if has no selector similarities
	        return utils$1.hasSimilarSelectors(selectors, prevSelectors);
	    });
	}

	// NOTE: direction should be left to right, since rulesets merge to left
	// ruleset. When direction right to left unmerged rulesets may prevent lookup
	// TODO: remove initial merge
	var _2InitialMergeRuleset = function initialMergeRule(ast) {
	    walk$5(ast, {
	        visit: 'Rule',
	        enter: processRule
	    });
	};

	var List$2 = csstree_min.List;
	var walk$6 = csstree_min.walk;

	function processRule$1(node, item, list) {
	    var selectors = node.prelude.children;

	    // generate new rule sets:
	    // .a, .b { color: red; }
	    // ->
	    // .a { color: red; }
	    // .b { color: red; }

	    // while there are more than 1 simple selector split for rulesets
	    while (selectors.head !== selectors.tail) {
	        var newSelectors = new List$2();
	        newSelectors.insert(selectors.remove(selectors.head));

	        list.insert(list.createItem({
	            type: 'Rule',
	            loc: node.loc,
	            prelude: {
	                type: 'SelectorList',
	                loc: node.prelude.loc,
	                children: newSelectors
	            },
	            block: {
	                type: 'Block',
	                loc: node.block.loc,
	                children: node.block.children.copy()
	            },
	            pseudoSignature: node.pseudoSignature
	        }), item);
	    }
	}

	var _3DisjoinRuleset = function disjoinRule(ast) {
	    walk$6(ast, {
	        visit: 'Rule',
	        reverse: true,
	        enter: processRule$1
	    });
	};

	var List$3 = csstree_min.List;
	var generate$3 = csstree_min.generate;
	var walk$7 = csstree_min.walk;

	var REPLACE = 1;
	var REMOVE = 2;
	var TOP = 0;
	var RIGHT = 1;
	var BOTTOM = 2;
	var LEFT = 3;
	var SIDES = ['top', 'right', 'bottom', 'left'];
	var SIDE = {
	    'margin-top': 'top',
	    'margin-right': 'right',
	    'margin-bottom': 'bottom',
	    'margin-left': 'left',

	    'padding-top': 'top',
	    'padding-right': 'right',
	    'padding-bottom': 'bottom',
	    'padding-left': 'left',

	    'border-top-color': 'top',
	    'border-right-color': 'right',
	    'border-bottom-color': 'bottom',
	    'border-left-color': 'left',
	    'border-top-width': 'top',
	    'border-right-width': 'right',
	    'border-bottom-width': 'bottom',
	    'border-left-width': 'left',
	    'border-top-style': 'top',
	    'border-right-style': 'right',
	    'border-bottom-style': 'bottom',
	    'border-left-style': 'left'
	};
	var MAIN_PROPERTY = {
	    'margin': 'margin',
	    'margin-top': 'margin',
	    'margin-right': 'margin',
	    'margin-bottom': 'margin',
	    'margin-left': 'margin',

	    'padding': 'padding',
	    'padding-top': 'padding',
	    'padding-right': 'padding',
	    'padding-bottom': 'padding',
	    'padding-left': 'padding',

	    'border-color': 'border-color',
	    'border-top-color': 'border-color',
	    'border-right-color': 'border-color',
	    'border-bottom-color': 'border-color',
	    'border-left-color': 'border-color',
	    'border-width': 'border-width',
	    'border-top-width': 'border-width',
	    'border-right-width': 'border-width',
	    'border-bottom-width': 'border-width',
	    'border-left-width': 'border-width',
	    'border-style': 'border-style',
	    'border-top-style': 'border-style',
	    'border-right-style': 'border-style',
	    'border-bottom-style': 'border-style',
	    'border-left-style': 'border-style'
	};

	function TRBL(name) {
	    this.name = name;
	    this.loc = null;
	    this.iehack = undefined;
	    this.sides = {
	        'top': null,
	        'right': null,
	        'bottom': null,
	        'left': null
	    };
	}

	TRBL.prototype.getValueSequence = function(declaration, count) {
	    var values = [];
	    var iehack = '';
	    var hasBadValues = declaration.value.type !== 'Value' || declaration.value.children.some(function(child) {
	        var special = false;

	        switch (child.type) {
	            case 'Identifier':
	                switch (child.name) {
	                    case '\\0':
	                    case '\\9':
	                        iehack = child.name;
	                        return;

	                    case 'inherit':
	                    case 'initial':
	                    case 'unset':
	                    case 'revert':
	                        special = child.name;
	                        break;
	                }
	                break;

	            case 'Dimension':
	                switch (child.unit) {
	                    // is not supported until IE11
	                    case 'rem':

	                    // v* units is too buggy across browsers and better
	                    // don't merge values with those units
	                    case 'vw':
	                    case 'vh':
	                    case 'vmin':
	                    case 'vmax':
	                    case 'vm': // IE9 supporting "vm" instead of "vmin".
	                        special = child.unit;
	                        break;
	                }
	                break;

	            case 'Hash': // color
	            case 'Number':
	            case 'Percentage':
	                break;

	            case 'Function':
	                if (child.name === 'var') {
	                    return true;
	                }

	                special = child.name;
	                break;

	            case 'WhiteSpace':
	                return false; // ignore space

	            default:
	                return true;  // bad value
	        }

	        values.push({
	            node: child,
	            special: special,
	            important: declaration.important
	        });
	    });

	    if (hasBadValues || values.length > count) {
	        return false;
	    }

	    if (typeof this.iehack === 'string' && this.iehack !== iehack) {
	        return false;
	    }

	    this.iehack = iehack; // move outside

	    return values;
	};

	TRBL.prototype.canOverride = function(side, value) {
	    var currentValue = this.sides[side];

	    return !currentValue || (value.important && !currentValue.important);
	};

	TRBL.prototype.add = function(name, declaration) {
	    function attemptToAdd() {
	        var sides = this.sides;
	        var side = SIDE[name];

	        if (side) {
	            if (side in sides === false) {
	                return false;
	            }

	            var values = this.getValueSequence(declaration, 1);

	            if (!values || !values.length) {
	                return false;
	            }

	            // can mix only if specials are equal
	            for (var key in sides) {
	                if (sides[key] !== null && sides[key].special !== values[0].special) {
	                    return false;
	                }
	            }

	            if (!this.canOverride(side, values[0])) {
	                return true;
	            }

	            sides[side] = values[0];
	            return true;
	        } else if (name === this.name) {
	            var values = this.getValueSequence(declaration, 4);

	            if (!values || !values.length) {
	                return false;
	            }

	            switch (values.length) {
	                case 1:
	                    values[RIGHT] = values[TOP];
	                    values[BOTTOM] = values[TOP];
	                    values[LEFT] = values[TOP];
	                    break;

	                case 2:
	                    values[BOTTOM] = values[TOP];
	                    values[LEFT] = values[RIGHT];
	                    break;

	                case 3:
	                    values[LEFT] = values[RIGHT];
	                    break;
	            }

	            // can mix only if specials are equal
	            for (var i = 0; i < 4; i++) {
	                for (var key in sides) {
	                    if (sides[key] !== null && sides[key].special !== values[i].special) {
	                        return false;
	                    }
	                }
	            }

	            for (var i = 0; i < 4; i++) {
	                if (this.canOverride(SIDES[i], values[i])) {
	                    sides[SIDES[i]] = values[i];
	                }
	            }

	            return true;
	        }
	    }

	    if (!attemptToAdd.call(this)) {
	        return false;
	    }

	    // TODO: use it when we can refer to several points in source
	    // if (this.loc) {
	    //     this.loc = {
	    //         primary: this.loc,
	    //         merged: declaration.loc
	    //     };
	    // } else {
	    //     this.loc = declaration.loc;
	    // }
	    if (!this.loc) {
	        this.loc = declaration.loc;
	    }

	    return true;
	};

	TRBL.prototype.isOkToMinimize = function() {
	    var top = this.sides.top;
	    var right = this.sides.right;
	    var bottom = this.sides.bottom;
	    var left = this.sides.left;

	    if (top && right && bottom && left) {
	        var important =
	            top.important +
	            right.important +
	            bottom.important +
	            left.important;

	        return important === 0 || important === 4;
	    }

	    return false;
	};

	TRBL.prototype.getValue = function() {
	    var result = new List$3();
	    var sides = this.sides;
	    var values = [
	        sides.top,
	        sides.right,
	        sides.bottom,
	        sides.left
	    ];
	    var stringValues = [
	        generate$3(sides.top.node),
	        generate$3(sides.right.node),
	        generate$3(sides.bottom.node),
	        generate$3(sides.left.node)
	    ];

	    if (stringValues[LEFT] === stringValues[RIGHT]) {
	        values.pop();
	        if (stringValues[BOTTOM] === stringValues[TOP]) {
	            values.pop();
	            if (stringValues[RIGHT] === stringValues[TOP]) {
	                values.pop();
	            }
	        }
	    }

	    for (var i = 0; i < values.length; i++) {
	        if (i) {
	            result.appendData({ type: 'WhiteSpace', value: ' ' });
	        }

	        result.appendData(values[i].node);
	    }

	    if (this.iehack) {
	        result.appendData({ type: 'WhiteSpace', value: ' ' });
	        result.appendData({
	            type: 'Identifier',
	            loc: null,
	            name: this.iehack
	        });
	    }

	    return {
	        type: 'Value',
	        loc: null,
	        children: result
	    };
	};

	TRBL.prototype.getDeclaration = function() {
	    return {
	        type: 'Declaration',
	        loc: this.loc,
	        important: this.sides.top.important,
	        property: this.name,
	        value: this.getValue()
	    };
	};

	function processRule$2(rule, shorts, shortDeclarations, lastShortSelector) {
	    var declarations = rule.block.children;
	    var selector = rule.prelude.children.first().id;

	    rule.block.children.eachRight(function(declaration, item) {
	        var property = declaration.property;

	        if (!MAIN_PROPERTY.hasOwnProperty(property)) {
	            return;
	        }

	        var key = MAIN_PROPERTY[property];
	        var shorthand;
	        var operation;

	        if (!lastShortSelector || selector === lastShortSelector) {
	            if (key in shorts) {
	                operation = REMOVE;
	                shorthand = shorts[key];
	            }
	        }

	        if (!shorthand || !shorthand.add(property, declaration)) {
	            operation = REPLACE;
	            shorthand = new TRBL(key);

	            // if can't parse value ignore it and break shorthand children
	            if (!shorthand.add(property, declaration)) {
	                lastShortSelector = null;
	                return;
	            }
	        }

	        shorts[key] = shorthand;
	        shortDeclarations.push({
	            operation: operation,
	            block: declarations,
	            item: item,
	            shorthand: shorthand
	        });

	        lastShortSelector = selector;
	    });

	    return lastShortSelector;
	}

	function processShorthands(shortDeclarations, markDeclaration) {
	    shortDeclarations.forEach(function(item) {
	        var shorthand = item.shorthand;

	        if (!shorthand.isOkToMinimize()) {
	            return;
	        }

	        if (item.operation === REPLACE) {
	            item.item.data = markDeclaration(shorthand.getDeclaration());
	        } else {
	            item.block.remove(item.item);
	        }
	    });
	}

	var _4RestructShorthand = function restructBlock(ast, indexer) {
	    var stylesheetMap = {};
	    var shortDeclarations = [];

	    walk$7(ast, {
	        visit: 'Rule',
	        reverse: true,
	        enter: function(node) {
	            var stylesheet = this.block || this.stylesheet;
	            var ruleId = (node.pseudoSignature || '') + '|' + node.prelude.children.first().id;
	            var ruleMap;
	            var shorts;

	            if (!stylesheetMap.hasOwnProperty(stylesheet.id)) {
	                ruleMap = {
	                    lastShortSelector: null
	                };
	                stylesheetMap[stylesheet.id] = ruleMap;
	            } else {
	                ruleMap = stylesheetMap[stylesheet.id];
	            }

	            if (ruleMap.hasOwnProperty(ruleId)) {
	                shorts = ruleMap[ruleId];
	            } else {
	                shorts = {};
	                ruleMap[ruleId] = shorts;
	            }

	            ruleMap.lastShortSelector = processRule$2.call(this, node, shorts, shortDeclarations, ruleMap.lastShortSelector);
	        }
	    });

	    processShorthands(shortDeclarations, indexer.declaration);
	};

	var resolveProperty = csstree_min.property;
	var resolveKeyword$4 = csstree_min.keyword;
	var walk$8 = csstree_min.walk;
	var generate$4 = csstree_min.generate;
	var fingerprintId = 1;
	var dontRestructure = {
	    'src': 1 // https://github.com/afelix/csso/issues/50
	};

	var DONT_MIX_VALUE = {
	    // https://developer.mozilla.org/en-US/docs/Web/CSS/display#Browser_compatibility
	    'display': /table|ruby|flex|-(flex)?box$|grid|contents|run-in/i,
	    // https://developer.mozilla.org/en/docs/Web/CSS/text-align
	    'text-align': /^(start|end|match-parent|justify-all)$/i
	};

	var SAFE_VALUES = {
	    cursor: [
	        'auto', 'crosshair', 'default', 'move', 'text', 'wait', 'help',
	        'n-resize', 'e-resize', 's-resize', 'w-resize',
	        'ne-resize', 'nw-resize', 'se-resize', 'sw-resize',
	        'pointer', 'progress', 'not-allowed', 'no-drop', 'vertical-text', 'all-scroll',
	        'col-resize', 'row-resize'
	    ],
	    overflow: [
	        'hidden', 'visible', 'scroll', 'auto'
	    ],
	    position: [
	        'static', 'relative', 'absolute', 'fixed'
	    ]
	};

	var NEEDLESS_TABLE = {
	    'border-width': ['border'],
	    'border-style': ['border'],
	    'border-color': ['border'],
	    'border-top': ['border'],
	    'border-right': ['border'],
	    'border-bottom': ['border'],
	    'border-left': ['border'],
	    'border-top-width': ['border-top', 'border-width', 'border'],
	    'border-right-width': ['border-right', 'border-width', 'border'],
	    'border-bottom-width': ['border-bottom', 'border-width', 'border'],
	    'border-left-width': ['border-left', 'border-width', 'border'],
	    'border-top-style': ['border-top', 'border-style', 'border'],
	    'border-right-style': ['border-right', 'border-style', 'border'],
	    'border-bottom-style': ['border-bottom', 'border-style', 'border'],
	    'border-left-style': ['border-left', 'border-style', 'border'],
	    'border-top-color': ['border-top', 'border-color', 'border'],
	    'border-right-color': ['border-right', 'border-color', 'border'],
	    'border-bottom-color': ['border-bottom', 'border-color', 'border'],
	    'border-left-color': ['border-left', 'border-color', 'border'],
	    'margin-top': ['margin'],
	    'margin-right': ['margin'],
	    'margin-bottom': ['margin'],
	    'margin-left': ['margin'],
	    'padding-top': ['padding'],
	    'padding-right': ['padding'],
	    'padding-bottom': ['padding'],
	    'padding-left': ['padding'],
	    'font-style': ['font'],
	    'font-variant': ['font'],
	    'font-weight': ['font'],
	    'font-size': ['font'],
	    'font-family': ['font'],
	    'list-style-type': ['list-style'],
	    'list-style-position': ['list-style'],
	    'list-style-image': ['list-style']
	};

	function getPropertyFingerprint(propertyName, declaration, fingerprints) {
	    var realName = resolveProperty(propertyName).basename;

	    if (realName === 'background') {
	        return propertyName + ':' + generate$4(declaration.value);
	    }

	    var declarationId = declaration.id;
	    var fingerprint = fingerprints[declarationId];

	    if (!fingerprint) {
	        switch (declaration.value.type) {
	            case 'Value':
	                var vendorId = '';
	                var iehack = '';
	                var special = {};
	                var raw = false;

	                declaration.value.children.each(function walk(node) {
	                    switch (node.type) {
	                        case 'Value':
	                        case 'Brackets':
	                        case 'Parentheses':
	                            node.children.each(walk);
	                            break;

	                        case 'Raw':
	                            raw = true;
	                            break;

	                        case 'Identifier':
	                            var name = node.name;

	                            if (!vendorId) {
	                                vendorId = resolveKeyword$4(name).vendor;
	                            }

	                            if (/\\[09]/.test(name)) {
	                                iehack = RegExp.lastMatch;
	                            }

	                            if (SAFE_VALUES.hasOwnProperty(realName)) {
	                                if (SAFE_VALUES[realName].indexOf(name) === -1) {
	                                    special[name] = true;
	                                }
	                            } else if (DONT_MIX_VALUE.hasOwnProperty(realName)) {
	                                if (DONT_MIX_VALUE[realName].test(name)) {
	                                    special[name] = true;
	                                }
	                            }

	                            break;

	                        case 'Function':
	                            var name = node.name;

	                            if (!vendorId) {
	                                vendorId = resolveKeyword$4(name).vendor;
	                            }

	                            if (name === 'rect') {
	                                // there are 2 forms of rect:
	                                //   rect(<top>, <right>, <bottom>, <left>) - standart
	                                //   rect(<top> <right> <bottom> <left>) – backwards compatible syntax
	                                // only the same form values can be merged
	                                var hasComma = node.children.some(function(node) {
	                                    return node.type === 'Operator' && node.value === ',';
	                                });
	                                if (!hasComma) {
	                                    name = 'rect-backward';
	                                }
	                            }

	                            special[name + '()'] = true;

	                            // check nested tokens too
	                            node.children.each(walk);

	                            break;

	                        case 'Dimension':
	                            var unit = node.unit;

	                            if (/\\[09]/.test(unit)) {
	                                iehack = RegExp.lastMatch;
	                            }

	                            switch (unit) {
	                                // is not supported until IE11
	                                case 'rem':

	                                // v* units is too buggy across browsers and better
	                                // don't merge values with those units
	                                case 'vw':
	                                case 'vh':
	                                case 'vmin':
	                                case 'vmax':
	                                case 'vm': // IE9 supporting "vm" instead of "vmin".
	                                    special[unit] = true;
	                                    break;
	                            }
	                            break;
	                    }
	                });

	                fingerprint = raw
	                    ? '!' + fingerprintId++
	                    : '!' + Object.keys(special).sort() + '|' + iehack + vendorId;
	                break;

	            case 'Raw':
	                fingerprint = '!' + declaration.value.value;
	                break;

	            default:
	                fingerprint = generate$4(declaration.value);
	        }

	        fingerprints[declarationId] = fingerprint;
	    }

	    return propertyName + fingerprint;
	}

	function needless(props, declaration, fingerprints) {
	    var property = resolveProperty(declaration.property);

	    if (NEEDLESS_TABLE.hasOwnProperty(property.basename)) {
	        var table = NEEDLESS_TABLE[property.basename];

	        for (var i = 0; i < table.length; i++) {
	            var ppre = getPropertyFingerprint(property.prefix + table[i], declaration, fingerprints);
	            var prev = props.hasOwnProperty(ppre) ? props[ppre] : null;

	            if (prev && (!declaration.important || prev.item.data.important)) {
	                return prev;
	            }
	        }
	    }
	}

	function processRule$3(rule, item, list, props, fingerprints) {
	    var declarations = rule.block.children;

	    declarations.eachRight(function(declaration, declarationItem) {
	        var property = declaration.property;
	        var fingerprint = getPropertyFingerprint(property, declaration, fingerprints);
	        var prev = props[fingerprint];

	        if (prev && !dontRestructure.hasOwnProperty(property)) {
	            if (declaration.important && !prev.item.data.important) {
	                props[fingerprint] = {
	                    block: declarations,
	                    item: declarationItem
	                };

	                prev.block.remove(prev.item);

	                // TODO: use it when we can refer to several points in source
	                // declaration.loc = {
	                //     primary: declaration.loc,
	                //     merged: prev.item.data.loc
	                // };
	            } else {
	                declarations.remove(declarationItem);

	                // TODO: use it when we can refer to several points in source
	                // prev.item.data.loc = {
	                //     primary: prev.item.data.loc,
	                //     merged: declaration.loc
	                // };
	            }
	        } else {
	            var prev = needless(props, declaration, fingerprints);

	            if (prev) {
	                declarations.remove(declarationItem);

	                // TODO: use it when we can refer to several points in source
	                // prev.item.data.loc = {
	                //     primary: prev.item.data.loc,
	                //     merged: declaration.loc
	                // };
	            } else {
	                declaration.fingerprint = fingerprint;

	                props[fingerprint] = {
	                    block: declarations,
	                    item: declarationItem
	                };
	            }
	        }
	    });

	    if (declarations.isEmpty()) {
	        list.remove(item);
	    }
	}

	var _6RestructBlock = function restructBlock(ast) {
	    var stylesheetMap = {};
	    var fingerprints = Object.create(null);

	    walk$8(ast, {
	        visit: 'Rule',
	        reverse: true,
	        enter: function(node, item, list) {
	            var stylesheet = this.block || this.stylesheet;
	            var ruleId = (node.pseudoSignature || '') + '|' + node.prelude.children.first().id;
	            var ruleMap;
	            var props;

	            if (!stylesheetMap.hasOwnProperty(stylesheet.id)) {
	                ruleMap = {};
	                stylesheetMap[stylesheet.id] = ruleMap;
	            } else {
	                ruleMap = stylesheetMap[stylesheet.id];
	            }

	            if (ruleMap.hasOwnProperty(ruleId)) {
	                props = ruleMap[ruleId];
	            } else {
	                props = {};
	                ruleMap[ruleId] = props;
	            }

	            processRule$3.call(this, node, item, list, props, fingerprints);
	        }
	    });
	};

	var walk$9 = csstree_min.walk;


	/*
	    At this step all rules has single simple selector. We try to join by equal
	    declaration blocks to first rule, e.g.

	    .a { color: red }
	    b { ... }
	    .b { color: red }
	    ->
	    .a, .b { color: red }
	    b { ... }
	*/

	function processRule$4(node, item, list) {
	    var selectors = node.prelude.children;
	    var declarations = node.block.children;
	    var nodeCompareMarker = selectors.first().compareMarker;
	    var skippedCompareMarkers = {};

	    list.nextUntil(item.next, function(next, nextItem) {
	        // skip non-ruleset node if safe
	        if (next.type !== 'Rule') {
	            return utils$1.unsafeToSkipNode.call(selectors, next);
	        }

	        if (node.pseudoSignature !== next.pseudoSignature) {
	            return true;
	        }

	        var nextFirstSelector = next.prelude.children.head;
	        var nextDeclarations = next.block.children;
	        var nextCompareMarker = nextFirstSelector.data.compareMarker;

	        // if next ruleset has same marked as one of skipped then stop joining
	        if (nextCompareMarker in skippedCompareMarkers) {
	            return true;
	        }

	        // try to join by selectors
	        if (selectors.head === selectors.tail) {
	            if (selectors.first().id === nextFirstSelector.data.id) {
	                declarations.appendList(nextDeclarations);
	                list.remove(nextItem);
	                return;
	            }
	        }

	        // try to join by properties
	        if (utils$1.isEqualDeclarations(declarations, nextDeclarations)) {
	            var nextStr = nextFirstSelector.data.id;

	            selectors.some(function(data, item) {
	                var curStr = data.id;

	                if (nextStr < curStr) {
	                    selectors.insert(nextFirstSelector, item);
	                    return true;
	                }

	                if (!item.next) {
	                    selectors.insert(nextFirstSelector);
	                    return true;
	                }
	            });

	            list.remove(nextItem);
	            return;
	        }

	        // go to next ruleset if current one can be skipped (has no equal specificity nor element selector)
	        if (nextCompareMarker === nodeCompareMarker) {
	            return true;
	        }

	        skippedCompareMarkers[nextCompareMarker] = true;
	    });
	}

	var _7MergeRuleset = function mergeRule(ast) {
	    walk$9(ast, {
	        visit: 'Rule',
	        enter: processRule$4
	    });
	};

	var List$4 = csstree_min.List;
	var walk$a = csstree_min.walk;


	function calcSelectorLength(list) {
	    var length = 0;

	    list.each(function(data) {
	        length += data.id.length + 1;
	    });

	    return length - 1;
	}

	function calcDeclarationsLength(tokens) {
	    var length = 0;

	    for (var i = 0; i < tokens.length; i++) {
	        length += tokens[i].length;
	    }

	    return (
	        length +          // declarations
	        tokens.length - 1 // delimeters
	    );
	}

	function processRule$5(node, item, list) {
	    var avoidRulesMerge = this.block !== null ? this.block.avoidRulesMerge : false;
	    var selectors = node.prelude.children;
	    var block = node.block;
	    var disallowDownMarkers = Object.create(null);
	    var allowMergeUp = true;
	    var allowMergeDown = true;

	    list.prevUntil(item.prev, function(prev, prevItem) {
	        var prevBlock = prev.block;
	        var prevType = prev.type;

	        if (prevType !== 'Rule') {
	            var unsafe = utils$1.unsafeToSkipNode.call(selectors, prev);

	            if (!unsafe && prevType === 'Atrule' && prevBlock) {
	                walk$a(prevBlock, {
	                    visit: 'Rule',
	                    enter: function(node) {
	                        node.prelude.children.each(function(data) {
	                            disallowDownMarkers[data.compareMarker] = true;
	                        });
	                    }
	                });
	            }

	            return unsafe;
	        }

	        var prevSelectors = prev.prelude.children;

	        if (node.pseudoSignature !== prev.pseudoSignature) {
	            return true;
	        }

	        allowMergeDown = !prevSelectors.some(function(selector) {
	            return selector.compareMarker in disallowDownMarkers;
	        });

	        // try prev ruleset if simpleselectors has no equal specifity and element selector
	        if (!allowMergeDown && !allowMergeUp) {
	            return true;
	        }

	        // try to join by selectors
	        if (allowMergeUp && utils$1.isEqualSelectors(prevSelectors, selectors)) {
	            prevBlock.children.appendList(block.children);
	            list.remove(item);
	            return true;
	        }

	        // try to join by properties
	        var diff = utils$1.compareDeclarations(block.children, prevBlock.children);

	        // console.log(diff.eq, diff.ne1, diff.ne2);

	        if (diff.eq.length) {
	            if (!diff.ne1.length && !diff.ne2.length) {
	                // equal blocks
	                if (allowMergeDown) {
	                    utils$1.addSelectors(selectors, prevSelectors);
	                    list.remove(prevItem);
	                }

	                return true;
	            } else if (!avoidRulesMerge) { /* probably we don't need to prevent those merges for @keyframes
	                                              TODO: need to be checked */

	                if (diff.ne1.length && !diff.ne2.length) {
	                    // prevBlock is subset block
	                    var selectorLength = calcSelectorLength(selectors);
	                    var blockLength = calcDeclarationsLength(diff.eq); // declarations length

	                    if (allowMergeUp && selectorLength < blockLength) {
	                        utils$1.addSelectors(prevSelectors, selectors);
	                        block.children = new List$4().fromArray(diff.ne1);
	                    }
	                } else if (!diff.ne1.length && diff.ne2.length) {
	                    // node is subset of prevBlock
	                    var selectorLength = calcSelectorLength(prevSelectors);
	                    var blockLength = calcDeclarationsLength(diff.eq); // declarations length

	                    if (allowMergeDown && selectorLength < blockLength) {
	                        utils$1.addSelectors(selectors, prevSelectors);
	                        prevBlock.children = new List$4().fromArray(diff.ne2);
	                    }
	                } else {
	                    // diff.ne1.length && diff.ne2.length
	                    // extract equal block
	                    var newSelector = {
	                        type: 'SelectorList',
	                        loc: null,
	                        children: utils$1.addSelectors(prevSelectors.copy(), selectors)
	                    };
	                    var newBlockLength = calcSelectorLength(newSelector.children) + 2; // selectors length + curly braces length
	                    var blockLength = calcDeclarationsLength(diff.eq); // declarations length

	                    // create new ruleset if declarations length greater than
	                    // ruleset description overhead
	                    if (blockLength >= newBlockLength) {
	                        var newItem = list.createItem({
	                            type: 'Rule',
	                            loc: null,
	                            prelude: newSelector,
	                            block: {
	                                type: 'Block',
	                                loc: null,
	                                children: new List$4().fromArray(diff.eq)
	                            },
	                            pseudoSignature: node.pseudoSignature
	                        });

	                        block.children = new List$4().fromArray(diff.ne1);
	                        prevBlock.children = new List$4().fromArray(diff.ne2overrided);

	                        if (allowMergeUp) {
	                            list.insert(newItem, prevItem);
	                        } else {
	                            list.insert(newItem, item);
	                        }

	                        return true;
	                    }
	                }
	            }
	        }

	        if (allowMergeUp) {
	            // TODO: disallow up merge only if any property interception only (i.e. diff.ne2overrided.length > 0);
	            // await property families to find property interception correctly
	            allowMergeUp = !prevSelectors.some(function(prevSelector) {
	                return selectors.some(function(selector) {
	                    return selector.compareMarker === prevSelector.compareMarker;
	                });
	            });
	        }

	        prevSelectors.each(function(data) {
	            disallowDownMarkers[data.compareMarker] = true;
	        });
	    });
	}

	var _8RestructRuleset = function restructRule(ast) {
	    walk$a(ast, {
	        visit: 'Rule',
	        reverse: true,
	        enter: processRule$5
	    });
	};

	var restructure = function(ast, options) {
	    // prepare ast for restructing
	    var indexer = prepare(ast, options);
	    options.logger('prepare', ast);

	    _1MergeAtrule(ast, options);
	    options.logger('mergeAtrule', ast);

	    _2InitialMergeRuleset(ast);
	    options.logger('initialMergeRuleset', ast);

	    _3DisjoinRuleset(ast);
	    options.logger('disjoinRuleset', ast);

	    _4RestructShorthand(ast, indexer);
	    options.logger('restructShorthand', ast);

	    _6RestructBlock(ast);
	    options.logger('restructBlock', ast);

	    _7MergeRuleset(ast);
	    options.logger('mergeRuleset', ast);

	    _8RestructRuleset(ast);
	    options.logger('restructRuleset', ast);
	};

	var List$5 = csstree_min.List;
	var clone = csstree_min.clone;




	var walk$b = csstree_min.walk;

	function readChunk(children, specialComments) {
	    var buffer = new List$5();
	    var nonSpaceTokenInBuffer = false;
	    var protectedComment;

	    children.nextUntil(children.head, function(node, item, list) {
	        if (node.type === 'Comment') {
	            if (!specialComments || node.value.charAt(0) !== '!') {
	                list.remove(item);
	                return;
	            }

	            if (nonSpaceTokenInBuffer || protectedComment) {
	                return true;
	            }

	            list.remove(item);
	            protectedComment = node;
	            return;
	        }

	        if (node.type !== 'WhiteSpace') {
	            nonSpaceTokenInBuffer = true;
	        }

	        buffer.insert(list.remove(item));
	    });

	    return {
	        comment: protectedComment,
	        stylesheet: {
	            type: 'StyleSheet',
	            loc: null,
	            children: buffer
	        }
	    };
	}

	function compressChunk(ast, firstAtrulesAllowed, num, options) {
	    options.logger('Compress block #' + num, null, true);

	    var seed = 1;

	    if (ast.type === 'StyleSheet') {
	        ast.firstAtrulesAllowed = firstAtrulesAllowed;
	        ast.id = seed++;
	    }

	    walk$b(ast, {
	        visit: 'Atrule',
	        enter: function markScopes(node) {
	            if (node.block !== null) {
	                node.block.id = seed++;
	            }
	        }
	    });
	    options.logger('init', ast);

	    // remove redundant
	    clean(ast, options);
	    options.logger('clean', ast);

	    // replace nodes for shortened forms
	    replace(ast);
	    options.logger('replace', ast);

	    // structure optimisations
	    if (options.restructuring) {
	        restructure(ast, options);
	    }

	    return ast;
	}

	function getCommentsOption(options) {
	    var comments = 'comments' in options ? options.comments : 'exclamation';

	    if (typeof comments === 'boolean') {
	        comments = comments ? 'exclamation' : false;
	    } else if (comments !== 'exclamation' && comments !== 'first-exclamation') {
	        comments = false;
	    }

	    return comments;
	}

	function getRestructureOption(options) {
	    if ('restructure' in options) {
	        return options.restructure;
	    }

	    return 'restructuring' in options ? options.restructuring : true;
	}

	function wrapBlock(block) {
	    return new List$5().appendData({
	        type: 'Rule',
	        loc: null,
	        prelude: {
	            type: 'SelectorList',
	            loc: null,
	            children: new List$5().appendData({
	                type: 'Selector',
	                loc: null,
	                children: new List$5().appendData({
	                    type: 'TypeSelector',
	                    loc: null,
	                    name: 'x'
	                })
	            })
	        },
	        block: block
	    });
	}

	var compress = function compress(ast, options) {
	    ast = ast || { type: 'StyleSheet', loc: null, children: new List$5() };
	    options = options || {};

	    var compressOptions = {
	        logger: typeof options.logger === 'function' ? options.logger : function() {},
	        restructuring: getRestructureOption(options),
	        forceMediaMerge: Boolean(options.forceMediaMerge),
	        usage: options.usage ? usage.buildIndex(options.usage) : false
	    };
	    var specialComments = getCommentsOption(options);
	    var firstAtrulesAllowed = true;
	    var input;
	    var output = new List$5();
	    var chunk;
	    var chunkNum = 1;
	    var chunkChildren;

	    if (options.clone) {
	        ast = clone(ast);
	    }

	    if (ast.type === 'StyleSheet') {
	        input = ast.children;
	        ast.children = output;
	    } else {
	        input = wrapBlock(ast);
	    }

	    do {
	        chunk = readChunk(input, Boolean(specialComments));
	        compressChunk(chunk.stylesheet, firstAtrulesAllowed, chunkNum++, compressOptions);
	        chunkChildren = chunk.stylesheet.children;

	        if (chunk.comment) {
	            // add \n before comment if there is another content in output
	            if (!output.isEmpty()) {
	                output.insert(List$5.createItem({
	                    type: 'Raw',
	                    value: '\n'
	                }));
	            }

	            output.insert(List$5.createItem(chunk.comment));

	            // add \n after comment if chunk is not empty
	            if (!chunkChildren.isEmpty()) {
	                output.insert(List$5.createItem({
	                    type: 'Raw',
	                    value: '\n'
	                }));
	            }
	        }

	        if (firstAtrulesAllowed && !chunkChildren.isEmpty()) {
	            var lastRule = chunkChildren.last();

	            if (lastRule.type !== 'Atrule' ||
	               (lastRule.name !== 'import' && lastRule.name !== 'charset')) {
	                firstAtrulesAllowed = false;
	            }
	        }

	        if (specialComments !== 'exclamation') {
	            specialComments = false;
	        }

	        output.appendList(chunkChildren);
	    } while (!input.isEmpty());

	    return {
	        ast: ast
	    };
	};

	var version = "4.2.0";
	var _package = {
		version: version
	};

	var _package$1 = /*#__PURE__*/Object.freeze({
		__proto__: null,
		version: version,
		'default': _package
	});

	var require$$0 = getCjsExportFromNamespace(_package$1);

	var parse = csstree_min.parse;

	var generate$5 = csstree_min.generate;

	function debugOutput(name, options, startTime, data) {
	    if (options.debug) {
	        console.error('## ' + name + ' done in %d ms\n', Date.now() - startTime);
	    }

	    return data;
	}

	function createDefaultLogger(level) {
	    var lastDebug;

	    return function logger(title, ast) {
	        var line = title;

	        if (ast) {
	            line = '[' + ((Date.now() - lastDebug) / 1000).toFixed(3) + 's] ' + line;
	        }

	        if (level > 1 && ast) {
	            var css = generate$5(ast);

	            // when level 2, limit css to 256 symbols
	            if (level === 2 && css.length > 256) {
	                css = css.substr(0, 256) + '...';
	            }

	            line += '\n  ' + css + '\n';
	        }

	        console.error(line);
	        lastDebug = Date.now();
	    };
	}

	function copy(obj) {
	    var result = {};

	    for (var key in obj) {
	        result[key] = obj[key];
	    }

	    return result;
	}

	function buildCompressOptions(options) {
	    options = copy(options);

	    if (typeof options.logger !== 'function' && options.debug) {
	        options.logger = createDefaultLogger(options.debug);
	    }

	    return options;
	}

	function runHandler(ast, options, handlers) {
	    if (!Array.isArray(handlers)) {
	        handlers = [handlers];
	    }

	    handlers.forEach(function(fn) {
	        fn(ast, options);
	    });
	}

	function minify(context, source, options) {
	    options = options || {};

	    var filename = options.filename || '<unknown>';
	    var result;

	    // parse
	    var ast = debugOutput('parsing', options, Date.now(),
	        parse(source, {
	            context: context,
	            filename: filename,
	            positions: Boolean(options.sourceMap)
	        })
	    );

	    // before compress handlers
	    if (options.beforeCompress) {
	        debugOutput('beforeCompress', options, Date.now(),
	            runHandler(ast, options, options.beforeCompress)
	        );
	    }

	    // compress
	    var compressResult = debugOutput('compress', options, Date.now(),
	        compress(ast, buildCompressOptions(options))
	    );

	    // after compress handlers
	    if (options.afterCompress) {
	        debugOutput('afterCompress', options, Date.now(),
	            runHandler(compressResult, options, options.afterCompress)
	        );
	    }

	    // generate
	    if (options.sourceMap) {
	        result = debugOutput('generate(sourceMap: true)', options, Date.now(), (function() {
	            var tmp = generate$5(compressResult.ast, { sourceMap: true });
	            tmp.map._file = filename; // since other tools can relay on file in source map transform chain
	            tmp.map.setSourceContent(filename, source);
	            return tmp;
	        }()));
	    } else {
	        result = debugOutput('generate', options, Date.now(), {
	            css: generate$5(compressResult.ast),
	            map: null
	        });
	    }

	    return result;
	}

	function minifyStylesheet(source, options) {
	    return minify('stylesheet', source, options);
	}

	function minifyBlock(source, options) {
	    return minify('declarationList', source, options);
	}

	var lib = {
	    version: require$$0.version,

	    // main methods
	    minify: minifyStylesheet,
	    minifyBlock: minifyBlock,

	    // css syntax parser/walkers/generator/etc
	    syntax: Object.assign({
	        compress: compress
	    }, csstree_min)
	};
	var lib_1 = lib.version;
	var lib_2 = lib.minify;
	var lib_3 = lib.minifyBlock;
	var lib_4 = lib.syntax;

	exports.default = lib;
	exports.minify = lib_2;
	exports.minifyBlock = lib_3;
	exports.syntax = lib_4;
	exports.version = lib_1;

	Object.defineProperty(exports, '__esModule', { value: true });

})));
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0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t((e=e||self).csso={})}(this,(function(e){"use strict";"undefined"!=typeof globalThis?globalThis:"undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self&&self;var t=function(e,t){return e(t={exports:{}},t.exports),t.exports}((function(e,t){e.exports=function(){function e(e){return{prev:null,next:null,data:e}}function t(e,t,n){var a;return null!==r?(a=r,r=r.cursor,a.prev=t,a.next=n,a.cursor=e.cursor):a={prev:t,next:n,cursor:e.cursor},e.cursor=a,a}function n(e){var t=e.cursor;e.cursor=t.cursor,t.prev=null,t.next=null,t.cursor=r,r=t}var r=null,a=function(){this.cursor=null,this.head=null,this.tail=null};a.createItem=e,a.prototype.createItem=e,a.prototype.updateCursors=function(e,t,n,r){for(var a=this.cursor;null!==a;)a.prev===e&&(a.prev=t),a.next===n&&(a.next=r),a=a.cursor},a.prototype.getSize=function(){for(var e=0,t=this.head;t;)e++,t=t.next;return e},a.prototype.fromArray=function(t){var n=null;this.head=null;for(var r=0;r<t.length;r++){var a=e(t[r]);null!==n?n.next=a:this.head=a,a.prev=n,n=a}return this.tail=n,this},a.prototype.toArray=function(){for(var e=this.head,t=[];e;)t.push(e.data),e=e.next;return t},a.prototype.toJSON=a.prototype.toArray,a.prototype.isEmpty=function(){return null===this.head},a.prototype.first=function(){return this.head&&this.head.data},a.prototype.last=function(){return this.tail&&this.tail.data},a.prototype.each=function(e,r){var a;void 0===r&&(r=this);for(var i=t(this,null,this.head);null!==i.next;)a=i.next,i.next=a.next,e.call(r,a.data,a,this);n(this)},a.prototype.forEach=a.prototype.each,a.prototype.eachRight=function(e,r){var a;void 0===r&&(r=this);for(var i=t(this,this.tail,null);null!==i.prev;)a=i.prev,i.prev=a.prev,e.call(r,a.data,a,this);n(this)},a.prototype.forEachRight=a.prototype.eachRight,a.prototype.reduce=function(e,r,a){var i;void 0===a&&(a=this);for(var o=t(this,null,this.head),s=r;null!==o.next;)i=o.next,o.next=i.next,s=e.call(a,s,i.data,i,this);return n(this),s},a.prototype.reduceRight=function(e,r,a){var i;void 0===a&&(a=this);for(var o=t(this,this.tail,null),s=r;null!==o.prev;)i=o.prev,o.prev=i.prev,s=e.call(a,s,i.data,i,this);return n(this),s},a.prototype.nextUntil=function(e,r,a){if(null!==e){var i;void 0===a&&(a=this);for(var o=t(this,null,e);null!==o.next&&(i=o.next,o.next=i.next,!r.call(a,i.data,i,this)););n(this)}},a.prototype.prevUntil=function(e,r,a){if(null!==e){var i;void 0===a&&(a=this);for(var o=t(this,e,null);null!==o.prev&&(i=o.prev,o.prev=i.prev,!r.call(a,i.data,i,this)););n(this)}},a.prototype.some=function(e,t){var n=this.head;for(void 0===t&&(t=this);null!==n;){if(e.call(t,n.data,n,this))return!0;n=n.next}return!1},a.prototype.map=function(e,t){var n=new a,r=this.head;for(void 0===t&&(t=this);null!==r;)n.appendData(e.call(t,r.data,r,this)),r=r.next;return n},a.prototype.filter=function(e,t){var n=new a,r=this.head;for(void 0===t&&(t=this);null!==r;)e.call(t,r.data,r,this)&&n.appendData(r.data),r=r.next;return n},a.prototype.clear=function(){this.head=null,this.tail=null},a.prototype.copy=function(){for(var t=new a,n=this.head;null!==n;)t.insert(e(n.data)),n=n.next;return t},a.prototype.prepend=function(e){return this.updateCursors(null,e,this.head,e),null!==this.head?(this.head.prev=e,e.next=this.head):this.tail=e,this.head=e,this},a.prototype.prependData=function(t){return this.prepend(e(t))},a.prototype.append=function(e){return this.insert(e)},a.prototype.appendData=function(t){return this.insert(e(t))},a.prototype.insert=function(e,t){if(null!=t)if(this.updateCursors(t.prev,e,t,e),null===t.prev){if(this.head!==t)throw new Error("before doesn't belong to list");this.head=e,t.prev=e,e.next=t,this.updateCursors(null,e)}else t.prev.next=e,e.prev=t.prev,t.prev=e,e.next=t;else this.updateCursors(this.tail,e,null,e),null!==this.tail?(this.tail.next=e,e.prev=this.tail):this.head=e,this.tail=e;return this},a.prototype.insertData=function(t,n){return this.insert(e(t),n)},a.prototype.remove=function(e){if(this.updateCursors(e,e.prev,e,e.next),null!==e.prev)e.prev.next=e.next;else{if(this.head!==e)throw new Error("item doesn't belong to list");this.head=e.next}if(null!==e.next)e.next.prev=e.prev;else{if(this.tail!==e)throw new Error("item doesn't belong to list");this.tail=e.prev}return e.prev=null,e.next=null,e},a.prototype.push=function(t){this.insert(e(t))},a.prototype.pop=function(){if(null!==this.tail)return 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e=this.scanner.tokenIndex,t=this.Value();return"Raw"!==t.type&&!1===this.scanner.eof&&this.scanner.tokenType!==Ya&&!1===this.scanner.isDelim(33)&&!1===this.scanner.isBalanceEdge(e)&&this.error(),t}var Qa={name:"Declaration",structure:{important:[Boolean,String],property:String,value:["Value","Raw"]},parse:function(){var e,t=this.scanner.tokenStart,n=this.scanner.tokenIndex,r=Xa.call(this),a=ja(r),i=a?this.parseCustomProperty:this.parseValue,o=a?Ga:Ka,s=!1;this.scanner.skipSC(),this.eat(Ua);const l=this.scanner.tokenIndex;if(a||this.scanner.skipSC(),e=i?this.parseWithFallback($a,o):o.call(this,this.scanner.tokenIndex),a&&"Value"===e.type&&e.children.isEmpty())for(let t=l-this.scanner.tokenIndex;t<=0;t++)if(this.scanner.lookupType(t)===Va){e.children.appendData({type:"WhiteSpace",loc:null,value:" "});break}return this.scanner.isDelim(33)&&(s=Za.call(this),this.scanner.skipSC()),!1===this.scanner.eof&&this.scanner.tokenType!==Ya&&!1===this.scanner.isBalanceEdge(n)&&this.error(),{type:"Declaration",loc:this.getLocation(t,this.scanner.tokenStart),important:s,property:r,value:e}},generate:function(e){this.chunk(e.property),this.chunk(":"),this.node(e.value),e.important&&this.chunk(!0===e.important?"!important":"!"+e.important)},walkContext:"declaration"};function Xa(){var e=this.scanner.tokenStart;if(this.scanner.tokenType===Ha)switch(this.scanner.source.charCodeAt(this.scanner.tokenStart)){case 42:case 36:case 43:case 35:case 38:this.scanner.next();break;case 47:this.scanner.next(),this.scanner.isDelim(47)&&this.scanner.next()}return this.scanner.tokenType===Fa?this.eat(Fa):this.eat(Wa),this.scanner.substrToCursor(e)}function Za(){this.eat(Ha),this.scanner.skipSC();var e=this.consume(Wa);return"important"===e||e}var Ja=we.TYPE,ei=Fr.mode,ti=Ja.WhiteSpace,ni=Ja.Comment,ri=Ja.Semicolon;function ai(e){return this.Raw(e,ei.semicolonIncluded,!0)}var ii={name:"DeclarationList",structure:{children:[["Declaration"]]},parse:function(){for(var e=this.createList();!this.scanner.eof;)switch(this.scanner.tokenType){case ti:case ni:case ri:this.scanner.next();break;default:e.push(this.parseWithFallback(this.Declaration,ai))}return{type:"DeclarationList",loc:this.getLocationFromList(e),children:e}},generate:function(e){this.children(e,(function(e){"Declaration"===e.type&&this.chunk(";")}))}},oi=M.consumeNumber,si=we.TYPE.Dimension,li={name:"Dimension",structure:{value:String,unit:String},parse:function(){var e=this.scanner.tokenStart,t=oi(this.scanner.source,e);return this.eat(si),{type:"Dimension",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.source.substring(e,t),unit:this.scanner.source.substring(t,this.scanner.tokenStart)}},generate:function(e){this.chunk(e.value),this.chunk(e.unit)}},ci=we.TYPE.RightParenthesis,ui={name:"Function",structure:{name:String,children:[[]]},parse:function(e,t){var n,r=this.scanner.tokenStart,a=this.consumeFunctionName(),i=a.toLowerCase();return n=t.hasOwnProperty(i)?t[i].call(this,t):e.call(this,t),this.scanner.eof||this.eat(ci),{type:"Function",loc:this.getLocation(r,this.scanner.tokenStart),name:a,children:n}},generate:function(e){this.chunk(e.name),this.chunk("("),this.children(e),this.chunk(")")},walkContext:"function"},hi=we.TYPE.Hash,di={name:"Hash",structure:{value:String},parse:function(){var e=this.scanner.tokenStart;return this.eat(hi),{type:"Hash",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.substrToCursor(e+1)}},generate:function(e){this.chunk("#"),this.chunk(e.value)}},pi=we.TYPE.Ident,mi={name:"Identifier",structure:{name:String},parse:function(){return{type:"Identifier",loc:this.getLocation(this.scanner.tokenStart,this.scanner.tokenEnd),name:this.consume(pi)}},generate:function(e){this.chunk(e.name)}},fi=we.TYPE.Hash,gi={name:"IdSelector",structure:{name:String},parse:function(){var e=this.scanner.tokenStart;return this.eat(fi),{type:"IdSelector",loc:this.getLocation(e,this.scanner.tokenStart),name:this.scanner.substrToCursor(e+1)}},generate:function(e){this.chunk("#"),this.chunk(e.name)}},bi=we.TYPE,yi=bi.Ident,vi=bi.Number,ki=bi.Dimension,wi=bi.LeftParenthesis,xi=bi.RightParenthesis,Si=bi.Colon,Ci=bi.Delim,Ai={name:"MediaFeature",structure:{name:String,value:["Identifier","Number","Dimension","Ratio",null]},parse:function(){var e,t=this.scanner.tokenStart,n=null;if(this.eat(wi),this.scanner.skipSC(),e=this.consume(yi),this.scanner.skipSC(),this.scanner.tokenType!==xi){switch(this.eat(Si),this.scanner.skipSC(),this.scanner.tokenType){case vi:n=this.lookupNonWSType(1)===Ci?this.Ratio():this.Number();break;case ki:n=this.Dimension();break;case yi:n=this.Identifier();break;default:this.error("Number, dimension, ratio or identifier is expected")}this.scanner.skipSC()}return this.eat(xi),{type:"MediaFeature",loc:this.getLocation(t,this.scanner.tokenStart),name:e,value:n}},generate:function(e){this.chunk("("),this.chunk(e.name),null!==e.value&&(this.chunk(":"),this.node(e.value)),this.chunk(")")}},zi=we.TYPE,Pi=zi.WhiteSpace,Li=zi.Comment,Ti=zi.Ident,Ei=zi.LeftParenthesis,Oi={name:"MediaQuery",structure:{children:[["Identifier","MediaFeature","WhiteSpace"]]},parse:function(){this.scanner.skipSC();var e=this.createList(),t=null,n=null;e:for(;!this.scanner.eof;){switch(this.scanner.tokenType){case 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t=this.createList();for(this.scanner.skipSC();!this.scanner.eof&&(t.push(this.MediaQuery(e)),this.scanner.tokenType===Di);)this.scanner.next();return{type:"MediaQueryList",loc:this.getLocationFromList(t),children:t}},generate:function(e){this.children(e,(function(){this.chunk(",")}))}},Ri=we.TYPE.Number,Ni={name:"Number",structure:{value:String},parse:function(){return{type:"Number",loc:this.getLocation(this.scanner.tokenStart,this.scanner.tokenEnd),value:this.consume(Ri)}},generate:function(e){this.chunk(e.value)}},Bi={name:"Operator",structure:{value:String},parse:function(){var e=this.scanner.tokenStart;return this.scanner.next(),{type:"Operator",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.substrToCursor(e)}},generate:function(e){this.chunk(e.value)}},Mi=we.TYPE,ji=Mi.LeftParenthesis,_i=Mi.RightParenthesis,qi={name:"Parentheses",structure:{children:[[]]},parse:function(e,t){var n,r=this.scanner.tokenStart;return this.eat(ji),n=e.call(this,t),this.scanner.eof||this.eat(_i),{type:"Parentheses",loc:this.getLocation(r,this.scanner.tokenStart),children:n}},generate:function(e){this.chunk("("),this.children(e),this.chunk(")")}},Wi=M.consumeNumber,Fi=we.TYPE.Percentage,Ui={name:"Percentage",structure:{value:String},parse:function(){var e=this.scanner.tokenStart,t=Wi(this.scanner.source,e);return this.eat(Fi),{type:"Percentage",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.source.substring(e,t)}},generate:function(e){this.chunk(e.value),this.chunk("%")}},Yi=we.TYPE,Hi=Yi.Ident,Vi=Yi.Function,Ki=Yi.Colon,Gi=Yi.RightParenthesis,$i={name:"PseudoClassSelector",structure:{name:String,children:[["Raw"],null]},parse:function(){var e,t,n=this.scanner.tokenStart,r=null;return this.eat(Ki),this.scanner.tokenType===Vi?(t=(e=this.consumeFunctionName()).toLowerCase(),this.pseudo.hasOwnProperty(t)?(this.scanner.skipSC(),r=this.pseudo[t].call(this),this.scanner.skipSC()):(r=this.createList()).push(this.Raw(this.scanner.tokenIndex,null,!1)),this.eat(Gi)):e=this.consume(Hi),{type:"PseudoClassSelector",loc:this.getLocation(n,this.scanner.tokenStart),name:e,children:r}},generate:function(e){this.chunk(":"),this.chunk(e.name),null!==e.children&&(this.chunk("("),this.children(e),this.chunk(")"))},walkContext:"function"},Qi=we.TYPE,Xi=Qi.Ident,Zi=Qi.Function,Ji=Qi.Colon,eo=Qi.RightParenthesis,to={name:"PseudoElementSelector",structure:{name:String,children:[["Raw"],null]},parse:function(){var e,t,n=this.scanner.tokenStart,r=null;return this.eat(Ji),this.eat(Ji),this.scanner.tokenType===Zi?(t=(e=this.consumeFunctionName()).toLowerCase(),this.pseudo.hasOwnProperty(t)?(this.scanner.skipSC(),r=this.pseudo[t].call(this),this.scanner.skipSC()):(r=this.createList()).push(this.Raw(this.scanner.tokenIndex,null,!1)),this.eat(eo)):e=this.consume(Xi),{type:"PseudoElementSelector",loc:this.getLocation(n,this.scanner.tokenStart),name:e,children:r}},generate:function(e){this.chunk("::"),this.chunk(e.name),null!==e.children&&(this.chunk("("),this.children(e),this.chunk(")"))},walkContext:"function"},no=we.isDigit,ro=we.TYPE,ao=ro.Number,io=ro.Delim;function oo(){this.scanner.skipWS();for(var e=this.consume(ao),t=0;t<e.length;t++){var n=e.charCodeAt(t);no(n)||46===n||this.error("Unsigned number is expected",this.scanner.tokenStart-e.length+t)}return 0===Number(e)&&this.error("Zero number is not allowed",this.scanner.tokenStart-e.length),e}var so={name:"Ratio",structure:{left:String,right:String},parse:function(){var e,t=this.scanner.tokenStart,n=oo.call(this);return this.scanner.skipWS(),this.scanner.isDelim(47)||this.error("Solidus is expected"),this.eat(io),e=oo.call(this),{type:"Ratio",loc:this.getLocation(t,this.scanner.tokenStart),left:n,right:e}},generate:function(e){this.chunk(e.left),this.chunk("/"),this.chunk(e.right)}},lo=we.TYPE,co=Fr.mode,uo=lo.LeftCurlyBracket;function ho(e){return this.Raw(e,co.leftCurlyBracket,!0)}function po(){var e=this.SelectorList();return"Raw"!==e.type&&!1===this.scanner.eof&&this.scanner.tokenType!==uo&&this.error(),e}var mo={name:"Rule",structure:{prelude:["SelectorList","Raw"],block:["Block"]},parse:function(){var e,t,n=this.scanner.tokenIndex,r=this.scanner.tokenStart;return e=this.parseRulePrelude?this.parseWithFallback(po,ho):ho.call(this,n),t=this.Block(!0),{type:"Rule",loc:this.getLocation(r,this.scanner.tokenStart),prelude:e,block:t}},generate:function(e){this.node(e.prelude),this.node(e.block)},walkContext:"rule"},fo=we.TYPE.Comma,go={name:"SelectorList",structure:{children:[["Selector","Raw"]]},parse:function(){for(var e=this.createList();!this.scanner.eof&&(e.push(this.Selector()),this.scanner.tokenType===fo);)this.scanner.next();return{type:"SelectorList",loc:this.getLocationFromList(e),children:e}},generate:function(e){this.children(e,(function(){this.chunk(",")}))},walkContext:"selector"},bo=we.TYPE.String,yo={name:"String",structure:{value:String},parse:function(){return{type:"String",loc:this.getLocation(this.scanner.tokenStart,this.scanner.tokenEnd),value:this.consume(bo)}},generate:function(e){this.chunk(e.value)}},vo=we.TYPE,ko=vo.WhiteSpace,wo=vo.Comment,xo=vo.AtKeyword,So=vo.CDO,Co=vo.CDC;function Ao(e){return this.Raw(e,null,!1)}var zo={name:"StyleSheet",structure:{children:[["Comment","CDO","CDC","Atrule","Rule","Raw"]]},parse:function(){for(var e,t=this.scanner.tokenStart,n=this.createList();!this.scanner.eof;){switch(this.scanner.tokenType){case ko:this.scanner.next();continue;case wo:if(33!==this.scanner.source.charCodeAt(this.scanner.tokenStart+2)){this.scanner.next();continue}e=this.Comment();break;case So:e=this.CDO();break;case Co:e=this.CDC();break;case xo:e=this.parseWithFallback(this.Atrule,Ao);break;default:e=this.parseWithFallback(this.Rule,Ao)}n.push(e)}return{type:"StyleSheet",loc:this.getLocation(t,this.scanner.tokenStart),children:n}},generate:function(e){this.children(e)},walkContext:"stylesheet"},Po=we.TYPE.Ident;function Lo(){this.scanner.tokenType!==Po&&!1===this.scanner.isDelim(42)&&this.error("Identifier or asterisk is expected"),this.scanner.next()}var To={name:"TypeSelector",structure:{name:String},parse:function(){var e=this.scanner.tokenStart;return this.scanner.isDelim(124)?(this.scanner.next(),Lo.call(this)):(Lo.call(this),this.scanner.isDelim(124)&&(this.scanner.next(),Lo.call(this))),{type:"TypeSelector",loc:this.getLocation(e,this.scanner.tokenStart),name:this.scanner.substrToCursor(e)}},generate:function(e){this.chunk(e.name)}},Eo=we.isHexDigit,Oo=we.cmpChar,Do=we.TYPE,Io=we.NAME,Ro=Do.Ident,No=Do.Number,Bo=Do.Dimension;function Mo(e,t){for(var n=this.scanner.tokenStart+e,r=0;n<this.scanner.tokenEnd;n++){var a=this.scanner.source.charCodeAt(n);if(45===a&&t&&0!==r)return 0===Mo.call(this,e+r+1,!1)&&this.error(),-1;Eo(a)||this.error(t&&0!==r?"HyphenMinus"+(r<6?" or hex digit":"")+" is expected":r<6?"Hex digit is expected":"Unexpected input",n),++r>6&&this.error("Too many hex digits",n)}return this.scanner.next(),r}function jo(e){for(var t=0;this.scanner.isDelim(63);)++t>e&&this.error("Too many question marks"),this.scanner.next()}function _o(e){this.scanner.source.charCodeAt(this.scanner.tokenStart)!==e&&this.error(Io[e]+" is 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expected"),this.scanner.next(),qo.call(this),{type:"UnicodeRange",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.substrToCursor(e)}},generate:function(e){this.chunk(e.value)}},Fo=we.isWhiteSpace,Uo=we.cmpStr,Yo=we.TYPE,Ho=Yo.Function,Vo=Yo.Url,Ko=Yo.RightParenthesis,Go={name:"Url",structure:{value:["String","Raw"]},parse:function(){var e,t=this.scanner.tokenStart;switch(this.scanner.tokenType){case Vo:for(var n=t+4,r=this.scanner.tokenEnd-1;n<r&&Fo(this.scanner.source.charCodeAt(n));)n++;for(;n<r&&Fo(this.scanner.source.charCodeAt(r-1));)r--;e={type:"Raw",loc:this.getLocation(n,r),value:this.scanner.source.substring(n,r)},this.eat(Vo);break;case Ho:Uo(this.scanner.source,this.scanner.tokenStart,this.scanner.tokenEnd,"url(")||this.error("Function name must be `url`"),this.eat(Ho),this.scanner.skipSC(),e=this.String(),this.scanner.skipSC(),this.eat(Ko);break;default:this.error("Url or Function is 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t=this.scanner.lookupValue(0,"odd")||this.scanner.lookupValue(0,"even")?this.Identifier():this.AnPlusB(),this.scanner.skipSC(),e&&this.scanner.lookupValue(0,"of")?(this.scanner.next(),a=this.SelectorList(),this.needPositions&&(r=this.getLastListNode(a.children).loc.end.offset)):this.needPositions&&(r=t.loc.end.offset),{type:"Nth",loc:this.getLocation(n,r),nth:t,selector:a}},generate:function(e){this.node(e.nth),null!==e.selector&&(this.chunk(" of "),this.node(e.selector))}},Number:Ni,Operator:Bi,Parentheses:qi,Percentage:Ui,PseudoClassSelector:$i,PseudoElementSelector:to,Ratio:so,Raw:Fr,Rule:mo,Selector:{name:"Selector",structure:{children:[["TypeSelector","IdSelector","ClassSelector","AttributeSelector","PseudoClassSelector","PseudoElementSelector","Combinator","WhiteSpace"]]},parse:function(){var e=this.readSequence(this.scope.Selector);return null===this.getFirstListNode(e)&&this.error("Selector is 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e.space=null,e.ignoreWSAfter=!0,this.Operator();case us:return this.Parentheses(this.readSequence,e.recognizer);case hs:return this.Brackets(this.readSequence,e.recognizer);case rs:return this.String();case ls:return this.Dimension();case cs:return this.Percentage();case as:return this.Number();case is:return es(this.scanner.source,this.scanner.tokenStart,this.scanner.tokenEnd,"url(")?this.Url():this.Function(this.readSequence,e.recognizer);case os:return this.Url();case ns:return Jo(this.scanner.source,this.scanner.tokenStart,117)&&Jo(this.scanner.source,this.scanner.tokenStart+1,43)?this.UnicodeRange():this.Identifier();case ps:var t=this.scanner.source.charCodeAt(this.scanner.tokenStart);if(47===t||42===t||43===t||45===t)return this.Operator();35===t&&this.error("Hex or identifier is 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this.IdSelector()}}}},zs=we.TYPE,Ps=Fr.mode,Ls=zs.Comma,Ts=zs.WhiteSpace,Es={AtrulePrelude:fs,Selector:As,Value:{getNode:ms,expression:function(){return this.createSingleNodeList(this.Raw(this.scanner.tokenIndex,null,!1))},var:function(){var e=this.createList();if(this.scanner.skipSC(),e.push(this.Identifier()),this.scanner.skipSC(),this.scanner.tokenType===Ls){e.push(this.Operator());const t=this.scanner.tokenIndex,n=this.parseCustomProperty?this.Value(null):this.Raw(this.scanner.tokenIndex,Ps.exclamationMarkOrSemicolon,!1);if("Value"===n.type&&n.children.isEmpty())for(let e=t-this.scanner.tokenIndex;e<=0;e++)if(this.scanner.lookupType(e)===Ts){n.children.appendData({type:"WhiteSpace",loc:null,value:" "});break}e.push(n)}return e}}},Os=we.TYPE,Ds=Os.String,Is=Os.Ident,Rs=Os.Url,Ns=Os.Function,Bs=Os.LeftParenthesis,Ms={parse:{prelude:function(){var e=this.createList();switch(this.scanner.skipSC(),this.scanner.tokenType){case Ds:e.push(this.String());break;case Rs:case Ns:e.push(this.Url());break;default:this.error("String or url() is expected")}return this.lookupNonWSType(0)!==Is&&this.lookupNonWSType(0)!==Bs||(e.push(this.WhiteSpace()),e.push(this.MediaQueryList())),e},block:null}},js=we.TYPE,_s=js.WhiteSpace,qs=js.Comment,Ws=js.Ident,Fs=js.Function,Us=js.Colon,Ys=js.LeftParenthesis;function Hs(){return this.createSingleNodeList(this.Raw(this.scanner.tokenIndex,null,!1))}function Vs(){return this.scanner.skipSC(),this.scanner.tokenType===Ws&&this.lookupNonWSType(1)===Us?this.createSingleNodeList(this.Declaration()):Ks.call(this)}function Ks(){var e,t=this.createList(),n=null;this.scanner.skipSC();e:for(;!this.scanner.eof;){switch(this.scanner.tokenType){case _s:n=this.WhiteSpace();continue;case qs:this.scanner.next();continue;case Fs:e=this.Function(Hs,this.scope.AtrulePrelude);break;case Ws:e=this.Identifier();break;case Ys:e=this.Parentheses(Vs,this.scope.AtrulePrelude);break;default:break e}null!==n&&(t.push(n),n=null),t.push(e)}return t}var Gs,$s={parse:function(){return this.createSingleNodeList(this.SelectorList())}},Qs={parse:function(){return this.createSingleNodeList(this.Nth(!0))}},Xs={parse:function(){return this.createSingleNodeList(this.Nth(!1))}},Zs={parseContext:{default:"StyleSheet",stylesheet:"StyleSheet",atrule:"Atrule",atrulePrelude:function(e){return this.AtrulePrelude(e.atrule?String(e.atrule):null)},mediaQueryList:"MediaQueryList",mediaQuery:"MediaQuery",rule:"Rule",selectorList:"SelectorList",selector:"Selector",block:function(){return this.Block(!0)},declarationList:"DeclarationList",declaration:"Declaration",value:"Value"},scope:Es,atrule:{"font-face":{parse:{prelude:null,block:function(){return this.Block(!0)}}},import:Ms,media:{parse:{prelude:function(){return this.createSingleNodeList(this.MediaQueryList())},block:function(){return this.Block(!1)}}},page:{parse:{prelude:function(){return this.createSingleNodeList(this.SelectorList())},block:function(){return this.Block(!0)}}},supports:{parse:{prelude:function(){var e=Ks.call(this);return null===this.getFirstListNode(e)&&this.error("Condition is expected"),e},block:function(){return this.Block(!1)}}}},pseudo:{dir:{parse:function(){return this.createSingleNodeList(this.Identifier())}},has:{parse:function(){return this.createSingleNodeList(this.SelectorList())}},lang:{parse:function(){return this.createSingleNodeList(this.Identifier())}},matches:$s,not:$s,"nth-child":Qs,"nth-last-child":Qs,"nth-last-of-type":Xs,"nth-of-type":Xs,slotted:{parse:function(){return this.createSingleNodeList(this.Selector())}}},node:Xo},Js={node:Xo},el=(Gs=Object.freeze({__proto__:null,version:"1.1.2",default:{version:"1.1.2"}}))&&Gs.default||Gs,tl=function(e){return kr(vr({},e))}(function(){for(var e={},t=0;t<arguments.length;t++){var n=arguments[t];for(var r in n)e[r]=n[r]}return e}(Zo,Zs,Js)),nl=el.version;return tl.version=nl,tl}()})),n=Object.prototype.hasOwnProperty;function r(e,t){var n=Object.create(null);if(!Array.isArray(e))return null;for(var r=0;r<e.length;r++){var a=e[r];t&&(a=a.toLowerCase()),n[a]=!0}return n}function a(e){if(!e)return null;var t=r(e.tags,!0),n=r(e.ids),a=r(e.classes);return null===t&&null===n&&null===a?null:{tags:t,ids:n,classes:a}}var i={buildIndex:function(e){var t=!1;if(e.scopes&&Array.isArray(e.scopes)){t=Object.create(null);for(var r=0;r<e.scopes.length;r++){var i=e.scopes[r];if(!i||!Array.isArray(i))throw new Error("Wrong usage format");for(var o=0;o<i.length;o++){var s=i[o];if(n.call(t,s))throw new Error("Class can't be used for several scopes: "+s);t[s]=r+1}}}return{whitelist:a(e),blacklist:a(e.blacklist),scopes:t}}},o={hasNoChildren:function(e){return!e||!e.children||e.children.isEmpty()},isNodeChildrenList:function(e,t){return null!==e&&e.children===t}},s=t.keyword,{hasNoChildren:l}=o,c=t.property,{isNodeChildrenList:u}=o,h=Object.prototype.hasOwnProperty,d=t.walk,{hasNoChildren:p}=o;var{isNodeChildrenList:m}=o;function 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ke=t.List,we=t.generate,xe=t.walk,Se=["top","right","bottom","left"],Ce={"margin-top":"top","margin-right":"right","margin-bottom":"bottom","margin-left":"left","padding-top":"top","padding-right":"right","padding-bottom":"bottom","padding-left":"left","border-top-color":"top","border-right-color":"right","border-bottom-color":"bottom","border-left-color":"left","border-top-width":"top","border-right-width":"right","border-bottom-width":"bottom","border-left-width":"left","border-top-style":"top","border-right-style":"right","border-bottom-style":"bottom","border-left-style":"left"},Ae={margin:"margin","margin-top":"margin","margin-right":"margin","margin-bottom":"margin","margin-left":"margin",padding:"padding","padding-top":"padding","padding-right":"padding","padding-bottom":"padding","padding-left":"padding","border-color":"border-color","border-top-color":"border-color","border-right-color":"border-color","border-bottom-color":"border-color","border-left-color":"border-color","border-width":"border-width","border-top-width":"border-width","border-right-width":"border-width","border-bottom-width":"border-width","border-left-width":"border-width","border-style":"border-style","border-top-style":"border-style","border-right-style":"border-style","border-bottom-style":"border-style","border-left-style":"border-style"};function ze(e){this.name=e,this.loc=null,this.iehack=void 0,this.sides={top:null,right:null,bottom:null,left:null}}function Pe(e,t,n,r){var a=e.block.children,i=e.prelude.children.first().id;return e.block.children.eachRight((function(e,o){var s=e.property;if(Ae.hasOwnProperty(s)){var l,c,u=Ae[s];r&&i!==r||u in t&&(c=2,l=t[u]),l&&l.add(s,e)||(c=1,(l=new ze(u)).add(s,e))?(t[u]=l,n.push({operation:c,block:a,item:o,shorthand:l}),r=i):r=null}})),r}ze.prototype.getValueSequence=function(e,t){var n=[],r="";return!("Value"!==e.value.type||e.value.children.some((function(t){var a=!1;switch(t.type){case"Identifier":switch(t.name){case"\\0":case"\\9":return void(r=t.name);case"inherit":case"initial":case"unset":case"revert":a=t.name}break;case"Dimension":switch(t.unit){case"rem":case"vw":case"vh":case"vmin":case"vmax":case"vm":a=t.unit}break;case"Hash":case"Number":case"Percentage":break;case"Function":if("var"===t.name)return!0;a=t.name;break;case"WhiteSpace":return!1;default:return!0}n.push({node:t,special:a,important:e.important})}))||n.length>t)&&(("string"!=typeof this.iehack||this.iehack===r)&&(this.iehack=r,n))},ze.prototype.canOverride=function(e,t){var n=this.sides[e];return!n||t.important&&!n.important},ze.prototype.add=function(e,t){return!!function(){var n=this.sides,r=Ce[e];if(r){if(r in n==!1)return!1;if(!(i=this.getValueSequence(t,1))||!i.length)return!1;for(var a in n)if(null!==n[a]&&n[a].special!==i[0].special)return!1;return!this.canOverride(r,i[0])||(n[r]=i[0],!0)}if(e===this.name){var i;if(!(i=this.getValueSequence(t,4))||!i.length)return!1;switch(i.length){case 1:i[1]=i[0],i[2]=i[0],i[3]=i[0];break;case 2:i[2]=i[0],i[3]=i[1];break;case 3:i[3]=i[1]}for(var o=0;o<4;o++)for(var a in n)if(null!==n[a]&&n[a].special!==i[o].special)return!1;for(o=0;o<4;o++)this.canOverride(Se[o],i[o])&&(n[Se[o]]=i[o]);return!0}}.call(this)&&(this.loc||(this.loc=t.loc),!0)},ze.prototype.isOkToMinimize=function(){var e=this.sides.top,t=this.sides.right,n=this.sides.bottom,r=this.sides.left;if(e&&t&&n&&r){var a=e.important+t.important+n.important+r.important;return 0===a||4===a}return!1},ze.prototype.getValue=function(){var e=new ke,t=this.sides,n=[t.top,t.right,t.bottom,t.left],r=[we(t.top.node),we(t.right.node),we(t.bottom.node),we(t.left.node)];r[3]===r[1]&&(n.pop(),r[2]===r[0]&&(n.pop(),r[1]===r[0]&&n.pop()));for(var a=0;a<n.length;a++)a&&e.appendData({type:"WhiteSpace",value:" "}),e.appendData(n[a].node);return this.iehack&&(e.appendData({type:"WhiteSpace",value:" "}),e.appendData({type:"Identifier",loc:null,name:this.iehack})),{type:"Value",loc:null,children:e}},ze.prototype.getDeclaration=function(){return{type:"Declaration",loc:this.loc,important:this.sides.top.important,property:this.name,value:this.getValue()}};var Le=function(e,t){var n={},r=[];xe(e,{visit:"Rule",reverse:!0,enter:function(e){var t,a,i=this.block||this.stylesheet,o=(e.pseudoSignature||"")+"|"+e.prelude.children.first().id;n.hasOwnProperty(i.id)?t=n[i.id]:(t={lastShortSelector:null},n[i.id]=t),t.hasOwnProperty(o)?a=t[o]:(a={},t[o]=a),t.lastShortSelector=Pe.call(this,e,a,r,t.lastShortSelector)}}),function(e,t){e.forEach((function(e){var n=e.shorthand;n.isOkToMinimize()&&(1===e.operation?e.item.data=t(n.getDeclaration()):e.block.remove(e.item))}))}(r,t.declaration)},Te=t.property,Ee=t.keyword,Oe=t.walk,De=t.generate,Ie=1,Re={src:1},Ne={display:/table|ruby|flex|-(flex)?box$|grid|contents|run-in/i,"text-align":/^(start|end|match-parent|justify-all)$/i},Be={cursor:["auto","crosshair","default","move","text","wait","help","n-resize","e-resize","s-resize","w-resize","ne-resize","nw-resize","se-resize","sw-resize","pointer","progress","not-allowed","no-drop","vertical-text","all-scroll","col-resize","row-resize"],overflow:["hidden","visible","scroll","auto"],position:["static","relative","absolute","fixed"]},Me={"border-width":["border"],"border-style":["border"],"border-color":["border"],"border-top":["border"],"border-right":["border"],"border-bottom":["border"],"border-left":["border"],"border-top-width":["border-top","border-width","border"],"border-right-width":["border-right","border-width","border"],"border-bottom-width":["border-bottom","border-width","border"],"border-left-width":["border-left","border-width","border"],"border-top-style":["border-top","border-style","border"],"border-right-style":["border-right","border-style","border"],"border-bottom-style":["border-bottom","border-style","border"],"border-left-style":["border-left","border-style","border"],"border-top-color":["border-top","border-color","border"],"border-right-color":["border-right","border-color","border"],"border-bottom-color":["border-bottom","border-color","border"],"border-left-color":["border-left","border-color","border"],"margin-top":["margin"],"margin-right":["margin"],"margin-bottom":["margin"],"margin-left":["margin"],"padding-top":["padding"],"padding-right":["padding"],"padding-bottom":["padding"],"padding-left":["padding"],"font-style":["font"],"font-variant":["font"],"font-weight":["font"],"font-size":["font"],"font-family":["font"],"list-style-type":["list-style"],"list-style-position":["list-style"],"list-style-image":["list-style"]};function je(e,t,n){var r=Te(e).basename;if("background"===r)return e+":"+De(t.value);var a=t.id,i=n[a];if(!i){switch(t.value.type){case"Value":var o="",s="",l={},c=!1;t.value.children.each((function e(t){switch(t.type){case"Value":case"Brackets":case"Parentheses":t.children.each(e);break;case"Raw":c=!0;break;case"Identifier":var n=t.name;o||(o=Ee(n).vendor),/\\[09]/.test(n)&&(s=RegExp.lastMatch),Be.hasOwnProperty(r)?-1===Be[r].indexOf(n)&&(l[n]=!0):Ne.hasOwnProperty(r)&&Ne[r].test(n)&&(l[n]=!0);break;case"Function":n=t.name;if(o||(o=Ee(n).vendor),"rect"===n)t.children.some((function(e){return"Operator"===e.type&&","===e.value}))||(n="rect-backward");l[n+"()"]=!0,t.children.each(e);break;case"Dimension":var a=t.unit;switch(/\\[09]/.test(a)&&(s=RegExp.lastMatch),a){case"rem":case"vw":case"vh":case"vmin":case"vmax":case"vm":l[a]=!0}}})),i=c?"!"+Ie++:"!"+Object.keys(l).sort()+"|"+s+o;break;case"Raw":i="!"+t.value.value;break;default:i=De(t.value)}n[a]=i}return e+i}function _e(e,t,n,r,a){var i=e.block.children;i.eachRight((function(e,t){var n,o=e.property,s=je(o,e,a);(n=r[s])&&!Re.hasOwnProperty(o)?e.important&&!n.item.data.important?(r[s]={block:i,item:t},n.block.remove(n.item)):i.remove(t):(n=function(e,t,n){var r=Te(t.property);if(Me.hasOwnProperty(r.basename))for(var a=Me[r.basename],i=0;i<a.length;i++){var o=je(r.prefix+a[i],t,n),s=e.hasOwnProperty(o)?e[o]:null;if(s&&(!t.important||s.item.data.important))return s}}(r,e,a))?i.remove(t):(e.fingerprint=s,r[s]={block:i,item:t})})),i.isEmpty()&&n.remove(t)}var qe=t.walk;function We(e,t,n){var r=e.prelude.children,a=e.block.children,i=r.first().compareMarker,o={};n.nextUntil(t.next,(function(t,s){if("Rule"!==t.type)return me.unsafeToSkipNode.call(r,t);if(e.pseudoSignature!==t.pseudoSignature)return!0;var l=t.prelude.children.head,c=t.block.children,u=l.data.compareMarker;if(u in o)return!0;if(r.head===r.tail&&r.first().id===l.data.id)return a.appendList(c),void n.remove(s);if(me.isEqualDeclarations(a,c)){var h=l.data.id;return r.some((function(e,t){var n=e.id;return h<n?(r.insert(l,t),!0):t.next?void 0:(r.insert(l),!0)})),void n.remove(s)}if(u===i)return!0;o[u]=!0}))}var Fe=t.List,Ue=t.walk;function Ye(e){var t=0;return e.each((function(e){t+=e.id.length+1})),t-1}function He(e){for(var t=0,n=0;n<e.length;n++)t+=e[n].length;return t+e.length-1}function Ve(e,t,n){var r=null!==this.block&&this.block.avoidRulesMerge,a=e.prelude.children,i=e.block,o=Object.create(null),s=!0,l=!0;n.prevUntil(t.prev,(function(c,u){var h=c.block,d=c.type;if("Rule"!==d){var p=me.unsafeToSkipNode.call(a,c);return!p&&"Atrule"===d&&h&&Ue(h,{visit:"Rule",enter:function(e){e.prelude.children.each((function(e){o[e.compareMarker]=!0}))}}),p}var m=c.prelude.children;if(e.pseudoSignature!==c.pseudoSignature)return!0;if(!(l=!m.some((function(e){return e.compareMarker in o})))&&!s)return!0;if(s&&me.isEqualSelectors(m,a))return h.children.appendList(i.children),n.remove(t),!0;var f=me.compareDeclarations(i.children,h.children);if(f.eq.length){if(!f.ne1.length&&!f.ne2.length)return l&&(me.addSelectors(a,m),n.remove(u)),!0;if(!r)if(f.ne1.length&&!f.ne2.length){var g=Ye(a),b=He(f.eq);s&&g<b&&(me.addSelectors(m,a),i.children=(new Fe).fromArray(f.ne1))}else if(!f.ne1.length&&f.ne2.length){g=Ye(m),b=He(f.eq);l&&g<b&&(me.addSelectors(a,m),h.children=(new Fe).fromArray(f.ne2))}else{var y={type:"SelectorList",loc:null,children:me.addSelectors(m.copy(),a)},v=Ye(y.children)+2;if((b=He(f.eq))>=v){var k=n.createItem({type:"Rule",loc:null,prelude:y,block:{type:"Block",loc:null,children:(new Fe).fromArray(f.eq)},pseudoSignature:e.pseudoSignature});return i.children=(new Fe).fromArray(f.ne1),h.children=(new Fe).fromArray(f.ne2overrided),s?n.insert(k,u):n.insert(k,t),!0}}}s&&(s=!m.some((function(e){return a.some((function(t){return t.compareMarker===e.compareMarker}))}))),m.each((function(e){o[e.compareMarker]=!0}))}))}var Ke=function(e,t){var n=re(e,t);t.logger("prepare",e),he(e,t),t.logger("mergeAtrule",e),function(e){fe(e,{visit:"Rule",enter:ge})}(e),t.logger("initialMergeRuleset",e),function(e){ye(e,{visit:"Rule",reverse:!0,enter:ve})}(e),t.logger("disjoinRuleset",e),Le(e,n),t.logger("restructShorthand",e),function(e){var t={},n=Object.create(null);Oe(e,{visit:"Rule",reverse:!0,enter:function(e,r,a){var i,o,s=this.block||this.stylesheet,l=(e.pseudoSignature||"")+"|"+e.prelude.children.first().id;t.hasOwnProperty(s.id)?i=t[s.id]:(i={},t[s.id]=i),i.hasOwnProperty(l)?o=i[l]:(o={},i[l]=o),_e.call(this,e,r,a,o,n)}})}(e),t.logger("restructBlock",e),function(e){qe(e,{visit:"Rule",enter:We})}(e),t.logger("mergeRuleset",e),function(e){Ue(e,{visit:"Rule",reverse:!0,enter:Ve})}(e),t.logger("restructRuleset",e)},Ge=t.List,$e=t.clone,Qe=t.walk;function Xe(e,t){var n,r=new Ge,a=!1;return e.nextUntil(e.head,(function(e,i,o){if("Comment"===e.type)return t&&"!"===e.value.charAt(0)?!(!a&&!n)||(o.remove(i),void(n=e)):void 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t="comments"in e?e.comments:"exclamation";return"boolean"==typeof t?t=!!t&&"exclamation":"exclamation"!==t&&"first-exclamation"!==t&&(t=!1),t}(t),c=!0,u=new Ge,h=1;t.clone&&(e=$e(e)),"StyleSheet"===e.type?(n=e.children,e.children=u):(o=e,n=(new Ge).appendData({type:"Rule",loc:null,prelude:{type:"SelectorList",loc:null,children:(new Ge).appendData({type:"Selector",loc:null,children:(new Ge).appendData({type:"TypeSelector",loc:null,name:"x"})})},block:o}));do{if(Ze((r=Xe(n,Boolean(l))).stylesheet,c,h++,s),a=r.stylesheet.children,r.comment&&(u.isEmpty()||u.insert(Ge.createItem({type:"Raw",value:"\n"})),u.insert(Ge.createItem(r.comment)),a.isEmpty()||u.insert(Ge.createItem({type:"Raw",value:"\n"}))),c&&!a.isEmpty()){var d=a.last();("Atrule"!==d.type||"import"!==d.name&&"charset"!==d.name)&&(c=!1)}"exclamation"!==l&&(l=!1),u.appendList(a)}while(!n.isEmpty());return{ast:e}},nt={version:"4.2.0"},rt=(et=Object.freeze({__proto__:null,version:"4.2.0",default:nt}))&&et.default||et,at=t.parse,it=t.generate;function ot(e,t,n,r){return t.debug&&console.error("## "+e+" done in %d ms\n",Date.now()-n),r}function st(e){var t,n;return"function"!=typeof(e=function(e){var t={};for(var n in e)t[n]=e[n];return t}(e)).logger&&e.debug&&(e.logger=(t=e.debug,function(e,r){var a=e;if(r&&(a="["+((Date.now()-n)/1e3).toFixed(3)+"s] "+a),t>1&&r){var i=it(r);2===t&&i.length>256&&(i=i.substr(0,256)+"..."),a+="\n  "+i+"\n"}console.error(a),n=Date.now()})),e}function lt(e,t,n){Array.isArray(n)||(n=[n]),n.forEach((function(n){n(e,t)}))}function ct(e,t,n){var r=(n=n||{}).filename||"<unknown>",a=ot("parsing",n,Date.now(),at(t,{context:e,filename:r,positions:Boolean(n.sourceMap)}));n.beforeCompress&&ot("beforeCompress",n,Date.now(),lt(a,n,n.beforeCompress));var i,o=ot("compress",n,Date.now(),tt(a,st(n)));return n.afterCompress&&ot("afterCompress",n,Date.now(),lt(o,n,n.afterCompress)),n.sourceMap?ot("generate(sourceMap: true)",n,Date.now(),((i=it(o.ast,{sourceMap:!0})).map._file=r,i.map.setSourceContent(r,t),i)):ot("generate",n,Date.now(),{css:it(o.ast),map:null})}var ut={version:rt.version,minify:function(e,t){return ct("stylesheet",e,t)},minifyBlock:function(e,t){return ct("declarationList",e,t)},syntax:Object.assign({compress:tt},t)},ht=ut.version,dt=ut.minify,pt=ut.minifyBlock,mt=ut.syntax;e.default=ut,e.minify=dt,e.minifyBlock=pt,e.syntax=mt,e.version=ht,Object.defineProperty(e,"__esModule",{value:!0})}));�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/clean/Atrule.js���������������������������������������������������������������������������������0000644�����������������00000003606�15120036664�0010176 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var resolveKeyword = require('css-tree').keyword;
var { hasNoChildren } = require('./utils');

module.exports = function cleanAtrule(node, item, list) {
    if (node.block) {
        // otherwise removed at-rule don't prevent @import for removal
        if (this.stylesheet !== null) {
            this.stylesheet.firstAtrulesAllowed = false;
        }

        if (hasNoChildren(node.block)) {
            list.remove(item);
            return;
        }
    }

    switch (node.name) {
        case 'charset':
            if (hasNoChildren(node.prelude)) {
                list.remove(item);
                return;
            }

            // if there is any rule before @charset -> remove it
            if (item.prev) {
                list.remove(item);
                return;
            }

            break;

        case 'import':
            if (this.stylesheet === null || !this.stylesheet.firstAtrulesAllowed) {
                list.remove(item);
                return;
            }

            // if there are some rules that not an @import or @charset before @import
            // remove it
            list.prevUntil(item.prev, function(rule) {
                if (rule.type === 'Atrule') {
                    if (rule.name === 'import' || rule.name === 'charset') {
                        return;
                    }
                }

                this.root.firstAtrulesAllowed = false;
                list.remove(item);
                return true;
            }, this);

            break;

        default:
            var name = resolveKeyword(node.name).basename;
            if (name === 'keyframes' ||
                name === 'media' ||
                name === 'supports') {

                // drop at-rule with no prelude
                if (hasNoChildren(node.prelude) || hasNoChildren(node.block)) {
                    list.remove(item);
                }
            }
    }
};
��������������������������������������������������������������������������������������������������������������������������lib/clean/Comment.js��������������������������������������������������������������������������������0000644�����������������00000000125�15120036664�0010335 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������module.exports = function cleanComment(data, item, list) {
    list.remove(item);
};
�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/clean/Declaration.js����������������������������������������������������������������������������0000644�����������������00000000576�15120036664�0011172 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var property = require('css-tree').property;

module.exports = function cleanDeclartion(node, item, list) {
    if (node.value.children && node.value.children.isEmpty()) {
        list.remove(item);
        return;
    }

    if (property(node.property).custom) {
        if (/\S/.test(node.value.value)) {
            node.value.value = node.value.value.trim();
        }
    }
};
����������������������������������������������������������������������������������������������������������������������������������lib/clean/Raw.js������������������������������������������������������������������������������������0000644�����������������00000000435�15120036664�0007470 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var { isNodeChildrenList } = require('./utils');

module.exports = function cleanRaw(node, item, list) {
    // raw in stylesheet or block children
    if (isNodeChildrenList(this.stylesheet, list) ||
        isNodeChildrenList(this.block, list)) {
        list.remove(item);
    }
};
�����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/clean/Rule.js�����������������������������������������������������������������������������������0000644�����������������00000007462�15120036664�0007655 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var hasOwnProperty = Object.prototype.hasOwnProperty;
var walk = require('css-tree').walk;
var { hasNoChildren } = require('./utils');

function cleanUnused(selectorList, usageData) {
    selectorList.children.each(function(selector, item, list) {
        var shouldRemove = false;

        walk(selector, function(node) {
            // ignore nodes in nested selectors
            if (this.selector === null || this.selector === selectorList) {
                switch (node.type) {
                    case 'SelectorList':
                        // TODO: remove toLowerCase when pseudo selectors will be normalized
                        // ignore selectors inside :not()
                        if (this.function === null || this.function.name.toLowerCase() !== 'not') {
                            if (cleanUnused(node, usageData)) {
                                shouldRemove = true;
                            }
                        }
                        break;

                    case 'ClassSelector':
                        if (usageData.whitelist !== null &&
                            usageData.whitelist.classes !== null &&
                            !hasOwnProperty.call(usageData.whitelist.classes, node.name)) {
                            shouldRemove = true;
                        }
                        if (usageData.blacklist !== null &&
                            usageData.blacklist.classes !== null &&
                            hasOwnProperty.call(usageData.blacklist.classes, node.name)) {
                            shouldRemove = true;
                        }
                        break;

                    case 'IdSelector':
                        if (usageData.whitelist !== null &&
                            usageData.whitelist.ids !== null &&
                            !hasOwnProperty.call(usageData.whitelist.ids, node.name)) {
                            shouldRemove = true;
                        }
                        if (usageData.blacklist !== null &&
                            usageData.blacklist.ids !== null &&
                            hasOwnProperty.call(usageData.blacklist.ids, node.name)) {
                            shouldRemove = true;
                        }
                        break;

                    case 'TypeSelector':
                        // TODO: remove toLowerCase when type selectors will be normalized
                        // ignore universal selectors
                        if (node.name.charAt(node.name.length - 1) !== '*') {
                            if (usageData.whitelist !== null &&
                                usageData.whitelist.tags !== null &&
                                !hasOwnProperty.call(usageData.whitelist.tags, node.name.toLowerCase())) {
                                shouldRemove = true;
                            }
                            if (usageData.blacklist !== null &&
                                usageData.blacklist.tags !== null &&
                                hasOwnProperty.call(usageData.blacklist.tags, node.name.toLowerCase())) {
                                shouldRemove = true;
                            }
                        }
                        break;
                }
            }
        });

        if (shouldRemove) {
            list.remove(item);
        }
    });

    return selectorList.children.isEmpty();
}

module.exports = function cleanRule(node, item, list, options) {
    if (hasNoChildren(node.prelude) || hasNoChildren(node.block)) {
        list.remove(item);
        return;
    }

    var usageData = options.usage;

    if (usageData && (usageData.whitelist !== null || usageData.blacklist !== null)) {
        cleanUnused(node.prelude, usageData);

        if (hasNoChildren(node.prelude)) {
            list.remove(item);
            return;
        }
    }
};
��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/clean/TypeSelector.js���������������������������������������������������������������������������0000644�����������������00000001127�15120036664�0011360 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������// remove useless universal selector
module.exports = function cleanTypeSelector(node, item, list) {
    var name = item.data.name;

    // check it's a non-namespaced universal selector
    if (name !== '*') {
        return;
    }

    // remove when universal selector before other selectors
    var nextType = item.next && item.next.data.type;
    if (nextType === 'IdSelector' ||
        nextType === 'ClassSelector' ||
        nextType === 'AttributeSelector' ||
        nextType === 'PseudoClassSelector' ||
        nextType === 'PseudoElementSelector') {
        list.remove(item);
    }
};
�����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/clean/WhiteSpace.js�����������������������������������������������������������������������������0000644�����������������00000001450�15120036664�0010771 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var { isNodeChildrenList } = require('./utils');

function isSafeOperator(node) {
    return node.type === 'Operator' && node.value !== '+' && node.value !== '-';
}

module.exports = function cleanWhitespace(node, item, list) {
    // remove when first or last item in sequence
    if (item.next === null || item.prev === null) {
        list.remove(item);
        return;
    }

    // white space in stylesheet or block children
    if (isNodeChildrenList(this.stylesheet, list) ||
        isNodeChildrenList(this.block, list)) {
        list.remove(item);
        return;
    }

    if (item.next.data.type === 'WhiteSpace') {
        list.remove(item);
        return;
    }

    if (isSafeOperator(item.prev.data) || isSafeOperator(item.next.data)) {
        list.remove(item);
        return;
    }
};
������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/clean/index.js����������������������������������������������������������������������������������0000644�����������������00000001100�15120036664�0010034 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var walk = require('css-tree').walk;
var handlers = {
    Atrule: require('./Atrule'),
    Comment: require('./Comment'),
    Declaration: require('./Declaration'),
    Raw: require('./Raw'),
    Rule: require('./Rule'),
    TypeSelector: require('./TypeSelector'),
    WhiteSpace: require('./WhiteSpace')
};

module.exports = function(ast, options) {
    walk(ast, {
        leave: function(node, item, list) {
            if (handlers.hasOwnProperty(node.type)) {
                handlers[node.type].call(this, node, item, list, options);
            }
        }
    });
};
����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/clean/utils.js����������������������������������������������������������������������������������0000644�����������������00000000361�15120036664�0010075 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������module.exports = {
    hasNoChildren: function(node) {
        return !node || !node.children || node.children.isEmpty();
    },
    isNodeChildrenList: function(node, list) {
        return node !== null && node.children === list;
    }
};
�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/compress.js�������������������������������������������������������������������������������������0000644�����������������00000012211�15120036664�0007503 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var List = require('css-tree').List;
var clone = require('css-tree').clone;
var usageUtils = require('./usage');
var clean = require('./clean');
var replace = require('./replace');
var restructure = require('./restructure');
var walk = require('css-tree').walk;

function readChunk(children, specialComments) {
    var buffer = new List();
    var nonSpaceTokenInBuffer = false;
    var protectedComment;

    children.nextUntil(children.head, function(node, item, list) {
        if (node.type === 'Comment') {
            if (!specialComments || node.value.charAt(0) !== '!') {
                list.remove(item);
                return;
            }

            if (nonSpaceTokenInBuffer || protectedComment) {
                return true;
            }

            list.remove(item);
            protectedComment = node;
            return;
        }

        if (node.type !== 'WhiteSpace') {
            nonSpaceTokenInBuffer = true;
        }

        buffer.insert(list.remove(item));
    });

    return {
        comment: protectedComment,
        stylesheet: {
            type: 'StyleSheet',
            loc: null,
            children: buffer
        }
    };
}

function compressChunk(ast, firstAtrulesAllowed, num, options) {
    options.logger('Compress block #' + num, null, true);

    var seed = 1;

    if (ast.type === 'StyleSheet') {
        ast.firstAtrulesAllowed = firstAtrulesAllowed;
        ast.id = seed++;
    }

    walk(ast, {
        visit: 'Atrule',
        enter: function markScopes(node) {
            if (node.block !== null) {
                node.block.id = seed++;
            }
        }
    });
    options.logger('init', ast);

    // remove redundant
    clean(ast, options);
    options.logger('clean', ast);

    // replace nodes for shortened forms
    replace(ast, options);
    options.logger('replace', ast);

    // structure optimisations
    if (options.restructuring) {
        restructure(ast, options);
    }

    return ast;
}

function getCommentsOption(options) {
    var comments = 'comments' in options ? options.comments : 'exclamation';

    if (typeof comments === 'boolean') {
        comments = comments ? 'exclamation' : false;
    } else if (comments !== 'exclamation' && comments !== 'first-exclamation') {
        comments = false;
    }

    return comments;
}

function getRestructureOption(options) {
    if ('restructure' in options) {
        return options.restructure;
    }

    return 'restructuring' in options ? options.restructuring : true;
}

function wrapBlock(block) {
    return new List().appendData({
        type: 'Rule',
        loc: null,
        prelude: {
            type: 'SelectorList',
            loc: null,
            children: new List().appendData({
                type: 'Selector',
                loc: null,
                children: new List().appendData({
                    type: 'TypeSelector',
                    loc: null,
                    name: 'x'
                })
            })
        },
        block: block
    });
}

module.exports = function compress(ast, options) {
    ast = ast || { type: 'StyleSheet', loc: null, children: new List() };
    options = options || {};

    var compressOptions = {
        logger: typeof options.logger === 'function' ? options.logger : function() {},
        restructuring: getRestructureOption(options),
        forceMediaMerge: Boolean(options.forceMediaMerge),
        usage: options.usage ? usageUtils.buildIndex(options.usage) : false
    };
    var specialComments = getCommentsOption(options);
    var firstAtrulesAllowed = true;
    var input;
    var output = new List();
    var chunk;
    var chunkNum = 1;
    var chunkChildren;

    if (options.clone) {
        ast = clone(ast);
    }

    if (ast.type === 'StyleSheet') {
        input = ast.children;
        ast.children = output;
    } else {
        input = wrapBlock(ast);
    }

    do {
        chunk = readChunk(input, Boolean(specialComments));
        compressChunk(chunk.stylesheet, firstAtrulesAllowed, chunkNum++, compressOptions);
        chunkChildren = chunk.stylesheet.children;

        if (chunk.comment) {
            // add \n before comment if there is another content in output
            if (!output.isEmpty()) {
                output.insert(List.createItem({
                    type: 'Raw',
                    value: '\n'
                }));
            }

            output.insert(List.createItem(chunk.comment));

            // add \n after comment if chunk is not empty
            if (!chunkChildren.isEmpty()) {
                output.insert(List.createItem({
                    type: 'Raw',
                    value: '\n'
                }));
            }
        }

        if (firstAtrulesAllowed && !chunkChildren.isEmpty()) {
            var lastRule = chunkChildren.last();

            if (lastRule.type !== 'Atrule' ||
               (lastRule.name !== 'import' && lastRule.name !== 'charset')) {
                firstAtrulesAllowed = false;
            }
        }

        if (specialComments !== 'exclamation') {
            specialComments = false;
        }

        output.appendList(chunkChildren);
    } while (!input.isEmpty());

    return {
        ast: ast
    };
};
���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/index.js����������������������������������������������������������������������������������������0000644�����������������00000006625�15120036664�0006773 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var csstree = require('css-tree');
var parse = csstree.parse;
var compress = require('./compress');
var generate = csstree.generate;

function debugOutput(name, options, startTime, data) {
    if (options.debug) {
        console.error('## ' + name + ' done in %d ms\n', Date.now() - startTime);
    }

    return data;
}

function createDefaultLogger(level) {
    var lastDebug;

    return function logger(title, ast) {
        var line = title;

        if (ast) {
            line = '[' + ((Date.now() - lastDebug) / 1000).toFixed(3) + 's] ' + line;
        }

        if (level > 1 && ast) {
            var css = generate(ast);

            // when level 2, limit css to 256 symbols
            if (level === 2 && css.length > 256) {
                css = css.substr(0, 256) + '...';
            }

            line += '\n  ' + css + '\n';
        }

        console.error(line);
        lastDebug = Date.now();
    };
}

function copy(obj) {
    var result = {};

    for (var key in obj) {
        result[key] = obj[key];
    }

    return result;
}

function buildCompressOptions(options) {
    options = copy(options);

    if (typeof options.logger !== 'function' && options.debug) {
        options.logger = createDefaultLogger(options.debug);
    }

    return options;
}

function runHandler(ast, options, handlers) {
    if (!Array.isArray(handlers)) {
        handlers = [handlers];
    }

    handlers.forEach(function(fn) {
        fn(ast, options);
    });
}

function minify(context, source, options) {
    options = options || {};

    var filename = options.filename || '<unknown>';
    var result;

    // parse
    var ast = debugOutput('parsing', options, Date.now(),
        parse(source, {
            context: context,
            filename: filename,
            positions: Boolean(options.sourceMap)
        })
    );

    // before compress handlers
    if (options.beforeCompress) {
        debugOutput('beforeCompress', options, Date.now(),
            runHandler(ast, options, options.beforeCompress)
        );
    }

    // compress
    var compressResult = debugOutput('compress', options, Date.now(),
        compress(ast, buildCompressOptions(options))
    );

    // after compress handlers
    if (options.afterCompress) {
        debugOutput('afterCompress', options, Date.now(),
            runHandler(compressResult, options, options.afterCompress)
        );
    }

    // generate
    if (options.sourceMap) {
        result = debugOutput('generate(sourceMap: true)', options, Date.now(), (function() {
            var tmp = generate(compressResult.ast, { sourceMap: true });
            tmp.map._file = filename; // since other tools can relay on file in source map transform chain
            tmp.map.setSourceContent(filename, source);
            return tmp;
        }()));
    } else {
        result = debugOutput('generate', options, Date.now(), {
            css: generate(compressResult.ast),
            map: null
        });
    }

    return result;
}

function minifyStylesheet(source, options) {
    return minify('stylesheet', source, options);
}

function minifyBlock(source, options) {
    return minify('declarationList', source, options);
}

module.exports = {
    version: require('../package.json').version,

    // main methods
    minify: minifyStylesheet,
    minifyBlock: minifyBlock,

    // css syntax parser/walkers/generator/etc
    syntax: Object.assign({
        compress: compress
    }, csstree)
};
�����������������������������������������������������������������������������������������������������������lib/replace/Atrule.js�������������������������������������������������������������������������������0000644�����������������00000000430�15120036664�0010517 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var resolveKeyword = require('css-tree').keyword;
var compressKeyframes = require('./atrule/keyframes');

module.exports = function(node) {
    // compress @keyframe selectors
    if (resolveKeyword(node.name).basename === 'keyframes') {
        compressKeyframes(node);
    }
};
����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/replace/AttributeSelector.js��������������������������������������������������������������������0000644�����������������00000001725�15120036664�0012737 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������// Can unquote attribute detection
// Adopted implementation of Mathias Bynens
// https://github.com/mathiasbynens/mothereff.in/blob/master/unquoted-attributes/eff.js
var escapesRx = /\\([0-9A-Fa-f]{1,6})(\r\n|[ \t\n\f\r])?|\\./g;
var blockUnquoteRx = /^(-?\d|--)|[\u0000-\u002c\u002e\u002f\u003A-\u0040\u005B-\u005E\u0060\u007B-\u009f]/;

function canUnquote(value) {
    if (value === '' || value === '-') {
        return;
    }

    // Escapes are valid, so replace them with a valid non-empty string
    value = value.replace(escapesRx, 'a');

    return !blockUnquoteRx.test(value);
}

module.exports = function(node) {
    var attrValue = node.value;

    if (!attrValue || attrValue.type !== 'String') {
        return;
    }

    var unquotedValue = attrValue.value.replace(/^(.)(.*)\1$/, '$2');
    if (canUnquote(unquotedValue)) {
        node.value = {
            type: 'Identifier',
            loc: attrValue.loc,
            name: unquotedValue
        };
    }
};
�������������������������������������������lib/replace/Dimension.js����������������������������������������������������������������������������0000644�����������������00000002724�15120036664�0011220 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var packNumber = require('./Number').pack;
var MATH_FUNCTIONS = {
    'calc': true,
    'min': true,
    'max': true,
    'clamp': true
};
var LENGTH_UNIT = {
    // absolute length units
    'px': true,
    'mm': true,
    'cm': true,
    'in': true,
    'pt': true,
    'pc': true,

    // relative length units
    'em': true,
    'ex': true,
    'ch': true,
    'rem': true,

    // viewport-percentage lengths
    'vh': true,
    'vw': true,
    'vmin': true,
    'vmax': true,
    'vm': true
};

module.exports = function compressDimension(node, item) {
    var value = packNumber(node.value, item);

    node.value = value;

    if (value === '0' && this.declaration !== null && this.atrulePrelude === null) {
        var unit = node.unit.toLowerCase();

        // only length values can be compressed
        if (!LENGTH_UNIT.hasOwnProperty(unit)) {
            return;
        }

        // issue #362: shouldn't remove unit in -ms-flex since it breaks flex in IE10/11
        // issue #200: shouldn't remove unit in flex since it breaks flex in IE10/11
        if (this.declaration.property === '-ms-flex' ||
            this.declaration.property === 'flex') {
            return;
        }

        // issue #222: don't remove units inside calc
        if (this.function && MATH_FUNCTIONS.hasOwnProperty(this.function.name)) {
            return;
        }

        item.data = {
            type: 'Number',
            loc: node.loc,
            value: value
        };
    }
};
��������������������������������������������lib/replace/Number.js�������������������������������������������������������������������������������0000644�����������������00000002071�15120036664�0010516 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var OMIT_PLUSSIGN = /^(?:\+|(-))?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/;
var KEEP_PLUSSIGN = /^([\+\-])?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/;
var unsafeToRemovePlusSignAfter = {
    Dimension: true,
    Hash: true,
    Identifier: true,
    Number: true,
    Raw: true,
    UnicodeRange: true
};

function packNumber(value, item) {
    // omit plus sign only if no prev or prev is safe type
    var regexp = item && item.prev !== null && unsafeToRemovePlusSignAfter.hasOwnProperty(item.prev.data.type)
        ? KEEP_PLUSSIGN
        : OMIT_PLUSSIGN;

    // 100 -> '100'
    // 00100 -> '100'
    // +100 -> '100' (only when safe, e.g. omitting plus sign for 1px+1px leads to single dimension instead of two)
    // -100 -> '-100'
    // 0.123 -> '.123'
    // 0.12300 -> '.123'
    // 0.0 -> ''
    // 0 -> ''
    // -0 -> '-'
    value = String(value).replace(regexp, '$1$2$3');

    if (value === '' || value === '-') {
        value = '0';
    }

    return value;
}

module.exports = function(node, item) {
    node.value = packNumber(node.value, item);
};
module.exports.pack = packNumber;
�����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/replace/Percentage.js���������������������������������������������������������������������������0000644�����������������00000002172�15120036664�0011345 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var lexer = require('css-tree').lexer;
var packNumber = require('./Number').pack;
var blacklist = new Set([
    // see https://github.com/jakubpawlowicz/clean-css/issues/957
    'width',
    'min-width',
    'max-width',
    'height',
    'min-height',
    'max-height',

    // issue #410: Don’t remove units in flex-basis value for (-ms-)flex shorthand
    // issue #362: shouldn't remove unit in -ms-flex since it breaks flex in IE10/11
    // issue #200: shouldn't remove unit in flex since it breaks flex in IE10/11
    'flex',
    '-ms-flex'
]);

module.exports = function compressPercentage(node, item) {
    node.value = packNumber(node.value, item);

    if (node.value === '0' && this.declaration && !blacklist.has(this.declaration.property)) {
        // try to convert a number
        item.data = {
            type: 'Number',
            loc: node.loc,
            value: node.value
        };

        // that's ok only when new value matches on length
        if (!lexer.matchDeclaration(this.declaration).isType(item.data, 'length')) {
            // otherwise rollback changes
            item.data = node;
        }
    }
};
������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/replace/String.js�������������������������������������������������������������������������������0000644�����������������00000000407�15120036664�0010535 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������module.exports = function(node) {
    var value = node.value;

    // remove escaped newlines, i.e.
    // .a { content: "foo\
    // bar"}
    // ->
    // .a { content: "foobar" }
    value = value.replace(/\\(\r\n|\r|\n|\f)/g, '');

    node.value = value;
};
���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/replace/Url.js����������������������������������������������������������������������������������0000644�����������������00000002046�15120036664�0010032 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var UNICODE = '\\\\[0-9a-f]{1,6}(\\r\\n|[ \\n\\r\\t\\f])?';
var ESCAPE = '(' + UNICODE + '|\\\\[^\\n\\r\\f0-9a-fA-F])';
var NONPRINTABLE = '\u0000\u0008\u000b\u000e-\u001f\u007f';
var SAFE_URL = new RegExp('^(' + ESCAPE + '|[^\"\'\\(\\)\\\\\\s' + NONPRINTABLE + '])*$', 'i');

module.exports = function(node) {
    var value = node.value;

    if (value.type !== 'String') {
        return;
    }

    var quote = value.value[0];
    var url = value.value.substr(1, value.value.length - 2);

    // convert `\\` to `/`
    url = url.replace(/\\\\/g, '/');

    // remove quotes when safe
    // https://www.w3.org/TR/css-syntax-3/#url-unquoted-diagram
    if (SAFE_URL.test(url)) {
        node.value = {
            type: 'Raw',
            loc: node.value.loc,
            value: url
        };
    } else {
        // use double quotes if string has no double quotes
        // otherwise use original quotes
        // TODO: make better quote type selection
        node.value.value = url.indexOf('"') === -1 ? '"' + url + '"' : quote + url + quote;
    }
};
������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/replace/Value.js��������������������������������������������������������������������������������0000644�����������������00000001071�15120036664�0010341 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var resolveName = require('css-tree').property;
var handlers = {
    'font': require('./property/font'),
    'font-weight': require('./property/font-weight'),
    'background': require('./property/background'),
    'border': require('./property/border'),
    'outline': require('./property/border')
};

module.exports = function compressValue(node) {
    if (!this.declaration) {
        return;
    }

    var property = resolveName(this.declaration.property);

    if (handlers.hasOwnProperty(property.basename)) {
        handlers[property.basename](node);
    }
};
�����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/replace/atrule/keyframes.js���������������������������������������������������������������������0000644�����������������00000001404�15120036665�0012550 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������module.exports = function(node) {
    node.block.children.each(function(rule) {
        rule.prelude.children.each(function(simpleselector) {
            simpleselector.children.each(function(data, item) {
                if (data.type === 'Percentage' && data.value === '100') {
                    item.data = {
                        type: 'TypeSelector',
                        loc: data.loc,
                        name: 'to'
                    };
                } else if (data.type === 'TypeSelector' && data.name === 'from') {
                    item.data = {
                        type: 'Percentage',
                        loc: data.loc,
                        value: '0'
                    };
                }
            });
        });
    });
};
������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/replace/color.js��������������������������������������������������������������������������������0000644�����������������00000031343�15120036665�0010411 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var lexer = require('css-tree').lexer;
var packNumber = require('./Number').pack;

// http://www.w3.org/TR/css3-color/#svg-color
var NAME_TO_HEX = {
    'aliceblue': 'f0f8ff',
    'antiquewhite': 'faebd7',
    'aqua': '0ff',
    'aquamarine': '7fffd4',
    'azure': 'f0ffff',
    'beige': 'f5f5dc',
    'bisque': 'ffe4c4',
    'black': '000',
    'blanchedalmond': 'ffebcd',
    'blue': '00f',
    'blueviolet': '8a2be2',
    'brown': 'a52a2a',
    'burlywood': 'deb887',
    'cadetblue': '5f9ea0',
    'chartreuse': '7fff00',
    'chocolate': 'd2691e',
    'coral': 'ff7f50',
    'cornflowerblue': '6495ed',
    'cornsilk': 'fff8dc',
    'crimson': 'dc143c',
    'cyan': '0ff',
    'darkblue': '00008b',
    'darkcyan': '008b8b',
    'darkgoldenrod': 'b8860b',
    'darkgray': 'a9a9a9',
    'darkgrey': 'a9a9a9',
    'darkgreen': '006400',
    'darkkhaki': 'bdb76b',
    'darkmagenta': '8b008b',
    'darkolivegreen': '556b2f',
    'darkorange': 'ff8c00',
    'darkorchid': '9932cc',
    'darkred': '8b0000',
    'darksalmon': 'e9967a',
    'darkseagreen': '8fbc8f',
    'darkslateblue': '483d8b',
    'darkslategray': '2f4f4f',
    'darkslategrey': '2f4f4f',
    'darkturquoise': '00ced1',
    'darkviolet': '9400d3',
    'deeppink': 'ff1493',
    'deepskyblue': '00bfff',
    'dimgray': '696969',
    'dimgrey': '696969',
    'dodgerblue': '1e90ff',
    'firebrick': 'b22222',
    'floralwhite': 'fffaf0',
    'forestgreen': '228b22',
    'fuchsia': 'f0f',
    'gainsboro': 'dcdcdc',
    'ghostwhite': 'f8f8ff',
    'gold': 'ffd700',
    'goldenrod': 'daa520',
    'gray': '808080',
    'grey': '808080',
    'green': '008000',
    'greenyellow': 'adff2f',
    'honeydew': 'f0fff0',
    'hotpink': 'ff69b4',
    'indianred': 'cd5c5c',
    'indigo': '4b0082',
    'ivory': 'fffff0',
    'khaki': 'f0e68c',
    'lavender': 'e6e6fa',
    'lavenderblush': 'fff0f5',
    'lawngreen': '7cfc00',
    'lemonchiffon': 'fffacd',
    'lightblue': 'add8e6',
    'lightcoral': 'f08080',
    'lightcyan': 'e0ffff',
    'lightgoldenrodyellow': 'fafad2',
    'lightgray': 'd3d3d3',
    'lightgrey': 'd3d3d3',
    'lightgreen': '90ee90',
    'lightpink': 'ffb6c1',
    'lightsalmon': 'ffa07a',
    'lightseagreen': '20b2aa',
    'lightskyblue': '87cefa',
    'lightslategray': '789',
    'lightslategrey': '789',
    'lightsteelblue': 'b0c4de',
    'lightyellow': 'ffffe0',
    'lime': '0f0',
    'limegreen': '32cd32',
    'linen': 'faf0e6',
    'magenta': 'f0f',
    'maroon': '800000',
    'mediumaquamarine': '66cdaa',
    'mediumblue': '0000cd',
    'mediumorchid': 'ba55d3',
    'mediumpurple': '9370db',
    'mediumseagreen': '3cb371',
    'mediumslateblue': '7b68ee',
    'mediumspringgreen': '00fa9a',
    'mediumturquoise': '48d1cc',
    'mediumvioletred': 'c71585',
    'midnightblue': '191970',
    'mintcream': 'f5fffa',
    'mistyrose': 'ffe4e1',
    'moccasin': 'ffe4b5',
    'navajowhite': 'ffdead',
    'navy': '000080',
    'oldlace': 'fdf5e6',
    'olive': '808000',
    'olivedrab': '6b8e23',
    'orange': 'ffa500',
    'orangered': 'ff4500',
    'orchid': 'da70d6',
    'palegoldenrod': 'eee8aa',
    'palegreen': '98fb98',
    'paleturquoise': 'afeeee',
    'palevioletred': 'db7093',
    'papayawhip': 'ffefd5',
    'peachpuff': 'ffdab9',
    'peru': 'cd853f',
    'pink': 'ffc0cb',
    'plum': 'dda0dd',
    'powderblue': 'b0e0e6',
    'purple': '800080',
    'rebeccapurple': '639',
    'red': 'f00',
    'rosybrown': 'bc8f8f',
    'royalblue': '4169e1',
    'saddlebrown': '8b4513',
    'salmon': 'fa8072',
    'sandybrown': 'f4a460',
    'seagreen': '2e8b57',
    'seashell': 'fff5ee',
    'sienna': 'a0522d',
    'silver': 'c0c0c0',
    'skyblue': '87ceeb',
    'slateblue': '6a5acd',
    'slategray': '708090',
    'slategrey': '708090',
    'snow': 'fffafa',
    'springgreen': '00ff7f',
    'steelblue': '4682b4',
    'tan': 'd2b48c',
    'teal': '008080',
    'thistle': 'd8bfd8',
    'tomato': 'ff6347',
    'turquoise': '40e0d0',
    'violet': 'ee82ee',
    'wheat': 'f5deb3',
    'white': 'fff',
    'whitesmoke': 'f5f5f5',
    'yellow': 'ff0',
    'yellowgreen': '9acd32'
};

var HEX_TO_NAME = {
    '800000': 'maroon',
    '800080': 'purple',
    '808000': 'olive',
    '808080': 'gray',
    '00ffff': 'cyan',
    'f0ffff': 'azure',
    'f5f5dc': 'beige',
    'ffe4c4': 'bisque',
    '000000': 'black',
    '0000ff': 'blue',
    'a52a2a': 'brown',
    'ff7f50': 'coral',
    'ffd700': 'gold',
    '008000': 'green',
    '4b0082': 'indigo',
    'fffff0': 'ivory',
    'f0e68c': 'khaki',
    '00ff00': 'lime',
    'faf0e6': 'linen',
    '000080': 'navy',
    'ffa500': 'orange',
    'da70d6': 'orchid',
    'cd853f': 'peru',
    'ffc0cb': 'pink',
    'dda0dd': 'plum',
    'f00': 'red',
    'ff0000': 'red',
    'fa8072': 'salmon',
    'a0522d': 'sienna',
    'c0c0c0': 'silver',
    'fffafa': 'snow',
    'd2b48c': 'tan',
    '008080': 'teal',
    'ff6347': 'tomato',
    'ee82ee': 'violet',
    'f5deb3': 'wheat',
    'ffffff': 'white',
    'ffff00': 'yellow'
};

function hueToRgb(p, q, t) {
    if (t < 0) {
        t += 1;
    }
    if (t > 1) {
        t -= 1;
    }
    if (t < 1 / 6) {
        return p + (q - p) * 6 * t;
    }
    if (t < 1 / 2) {
        return q;
    }
    if (t < 2 / 3) {
        return p + (q - p) * (2 / 3 - t) * 6;
    }
    return p;
}

function hslToRgb(h, s, l, a) {
    var r;
    var g;
    var b;

    if (s === 0) {
        r = g = b = l; // achromatic
    } else {
        var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
        var p = 2 * l - q;

        r = hueToRgb(p, q, h + 1 / 3);
        g = hueToRgb(p, q, h);
        b = hueToRgb(p, q, h - 1 / 3);
    }

    return [
        Math.round(r * 255),
        Math.round(g * 255),
        Math.round(b * 255),
        a
    ];
}

function toHex(value) {
    value = value.toString(16);
    return value.length === 1 ? '0' + value : value;
}

function parseFunctionArgs(functionArgs, count, rgb) {
    var cursor = functionArgs.head;
    var args = [];
    var wasValue = false;

    while (cursor !== null) {
        var node = cursor.data;
        var type = node.type;

        switch (type) {
            case 'Number':
            case 'Percentage':
                if (wasValue) {
                    return;
                }

                wasValue = true;
                args.push({
                    type: type,
                    value: Number(node.value)
                });
                break;

            case 'Operator':
                if (node.value === ',') {
                    if (!wasValue) {
                        return;
                    }
                    wasValue = false;
                } else if (wasValue || node.value !== '+') {
                    return;
                }
                break;

            default:
                // something we couldn't understand
                return;
        }

        cursor = cursor.next;
    }

    if (args.length !== count) {
        // invalid arguments count
        // TODO: remove those tokens
        return;
    }

    if (args.length === 4) {
        if (args[3].type !== 'Number') {
            // 4th argument should be a number
            // TODO: remove those tokens
            return;
        }

        args[3].type = 'Alpha';
    }

    if (rgb) {
        if (args[0].type !== args[1].type || args[0].type !== args[2].type) {
            // invalid color, numbers and percentage shouldn't be mixed
            // TODO: remove those tokens
            return;
        }
    } else {
        if (args[0].type !== 'Number' ||
            args[1].type !== 'Percentage' ||
            args[2].type !== 'Percentage') {
            // invalid color, for hsl values should be: number, percentage, percentage
            // TODO: remove those tokens
            return;
        }

        args[0].type = 'Angle';
    }

    return args.map(function(arg) {
        var value = Math.max(0, arg.value);

        switch (arg.type) {
            case 'Number':
                // fit value to [0..255] range
                value = Math.min(value, 255);
                break;

            case 'Percentage':
                // convert 0..100% to value in [0..255] range
                value = Math.min(value, 100) / 100;

                if (!rgb) {
                    return value;
                }

                value = 255 * value;
                break;

            case 'Angle':
                // fit value to (-360..360) range
                return (((value % 360) + 360) % 360) / 360;

            case 'Alpha':
                // fit value to [0..1] range
                return Math.min(value, 1);
        }

        return Math.round(value);
    });
}

function compressFunction(node, item, list) {
    var functionName = node.name;
    var args;

    if (functionName === 'rgba' || functionName === 'hsla') {
        args = parseFunctionArgs(node.children, 4, functionName === 'rgba');

        if (!args) {
            // something went wrong
            return;
        }

        if (functionName === 'hsla') {
            args = hslToRgb.apply(null, args);
            node.name = 'rgba';
        }

        if (args[3] === 0) {
            // try to replace `rgba(x, x, x, 0)` to `transparent`
            // always replace `rgba(0, 0, 0, 0)` to `transparent`
            // otherwise avoid replacement in gradients since it may break color transition
            // http://stackoverflow.com/questions/11829410/css3-gradient-rendering-issues-from-transparent-to-white
            var scopeFunctionName = this.function && this.function.name;
            if ((args[0] === 0 && args[1] === 0 && args[2] === 0) ||
                !/^(?:to|from|color-stop)$|gradient$/i.test(scopeFunctionName)) {

                item.data = {
                    type: 'Identifier',
                    loc: node.loc,
                    name: 'transparent'
                };

                return;
            }
        }

        if (args[3] !== 1) {
            // replace argument values for normalized/interpolated
            node.children.each(function(node, item, list) {
                if (node.type === 'Operator') {
                    if (node.value !== ',') {
                        list.remove(item);
                    }
                    return;
                }

                item.data = {
                    type: 'Number',
                    loc: node.loc,
                    value: packNumber(args.shift(), null)
                };
            });

            return;
        }

        // otherwise convert to rgb, i.e. rgba(255, 0, 0, 1) -> rgb(255, 0, 0)
        functionName = 'rgb';
    }

    if (functionName === 'hsl') {
        args = args || parseFunctionArgs(node.children, 3, false);

        if (!args) {
            // something went wrong
            return;
        }

        // convert to rgb
        args = hslToRgb.apply(null, args);
        functionName = 'rgb';
    }

    if (functionName === 'rgb') {
        args = args || parseFunctionArgs(node.children, 3, true);

        if (!args) {
            // something went wrong
            return;
        }

        // check if color is not at the end and not followed by space
        var next = item.next;
        if (next && next.data.type !== 'WhiteSpace') {
            list.insert(list.createItem({
                type: 'WhiteSpace',
                value: ' '
            }), next);
        }

        item.data = {
            type: 'Hash',
            loc: node.loc,
            value: toHex(args[0]) + toHex(args[1]) + toHex(args[2])
        };

        compressHex(item.data, item);
    }
}

function compressIdent(node, item) {
    if (this.declaration === null) {
        return;
    }

    var color = node.name.toLowerCase();

    if (NAME_TO_HEX.hasOwnProperty(color) &&
        lexer.matchDeclaration(this.declaration).isType(node, 'color')) {
        var hex = NAME_TO_HEX[color];

        if (hex.length + 1 <= color.length) {
            // replace for shorter hex value
            item.data = {
                type: 'Hash',
                loc: node.loc,
                value: hex
            };
        } else {
            // special case for consistent colors
            if (color === 'grey') {
                color = 'gray';
            }

            // just replace value for lower cased name
            node.name = color;
        }
    }
}

function compressHex(node, item) {
    var color = node.value.toLowerCase();

    // #112233 -> #123
    if (color.length === 6 &&
        color[0] === color[1] &&
        color[2] === color[3] &&
        color[4] === color[5]) {
        color = color[0] + color[2] + color[4];
    }

    if (HEX_TO_NAME[color]) {
        item.data = {
            type: 'Identifier',
            loc: node.loc,
            name: HEX_TO_NAME[color]
        };
    } else {
        node.value = color;
    }
}

module.exports = {
    compressFunction: compressFunction,
    compressIdent: compressIdent,
    compressHex: compressHex
};
���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/replace/index.js��������������������������������������������������������������������������������0000644�����������������00000001344�15120036665�0010400 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var walk = require('css-tree').walk;
var handlers = {
    Atrule: require('./Atrule'),
    AttributeSelector: require('./AttributeSelector'),
    Value: require('./Value'),
    Dimension: require('./Dimension'),
    Percentage: require('./Percentage'),
    Number: require('./Number'),
    String: require('./String'),
    Url: require('./Url'),
    Hash: require('./color').compressHex,
    Identifier: require('./color').compressIdent,
    Function: require('./color').compressFunction
};

module.exports = function(ast) {
    walk(ast, {
        leave: function(node, item, list) {
            if (handlers.hasOwnProperty(node.type)) {
                handlers[node.type].call(this, node, item, list);
            }
        }
    });
};
��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/replace/property/background.js������������������������������������������������������������������0000644�����������������00000003151�15120036665�0013272 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var List = require('css-tree').List;

module.exports = function compressBackground(node) {
    function lastType() {
        if (buffer.length) {
            return buffer[buffer.length - 1].type;
        }
    }

    function flush() {
        if (lastType() === 'WhiteSpace') {
            buffer.pop();
        }

        if (!buffer.length) {
            buffer.unshift(
                {
                    type: 'Number',
                    loc: null,
                    value: '0'
                },
                {
                    type: 'WhiteSpace',
                    value: ' '
                },
                {
                    type: 'Number',
                    loc: null,
                    value: '0'
                }
            );
        }

        newValue.push.apply(newValue, buffer);

        buffer = [];
    }

    var newValue = [];
    var buffer = [];

    node.children.each(function(node) {
        if (node.type === 'Operator' && node.value === ',') {
            flush();
            newValue.push(node);
            return;
        }

        // remove defaults
        if (node.type === 'Identifier') {
            if (node.name === 'transparent' ||
                node.name === 'none' ||
                node.name === 'repeat' ||
                node.name === 'scroll') {
                return;
            }
        }

        // don't add redundant spaces
        if (node.type === 'WhiteSpace' && (!buffer.length || lastType() === 'WhiteSpace')) {
            return;
        }

        buffer.push(node);
    });

    flush();
    node.children = new List().fromArray(newValue);
};
�����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/replace/property/border.js����������������������������������������������������������������������0000644�����������������00000001710�15120036665�0012427 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������function removeItemAndRedundantWhiteSpace(list, item) {
    var prev = item.prev;
    var next = item.next;

    if (next !== null) {
        if (next.data.type === 'WhiteSpace' && (prev === null || prev.data.type === 'WhiteSpace')) {
            list.remove(next);
        }
    } else if (prev !== null && prev.data.type === 'WhiteSpace') {
        list.remove(prev);
    }

    list.remove(item);
}

module.exports = function compressBorder(node) {
    node.children.each(function(node, item, list) {
        if (node.type === 'Identifier' && node.name.toLowerCase() === 'none') {
            if (list.head === list.tail) {
                // replace `none` for zero when `none` is a single term
                item.data = {
                    type: 'Number',
                    loc: node.loc,
                    value: '0'
                };
            } else {
                removeItemAndRedundantWhiteSpace(list, item);
            }
        }
    });
};
��������������������������������������������������������lib/replace/property/font-weight.js�����������������������������������������������������������������0000644�����������������00000001151�15120036665�0013404 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������module.exports = function compressFontWeight(node) {
    var value = node.children.head.data;

    if (value.type === 'Identifier') {
        switch (value.name) {
            case 'normal':
                node.children.head.data = {
                    type: 'Number',
                    loc: value.loc,
                    value: '400'
                };
                break;
            case 'bold':
                node.children.head.data = {
                    type: 'Number',
                    loc: value.loc,
                    value: '700'
                };
                break;
        }
    }
};
�����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/replace/property/font.js������������������������������������������������������������������������0000644�����������������00000002367�15120036665�0012131 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������module.exports = function compressFont(node) {
    var list = node.children;

    list.eachRight(function(node, item) {
        if (node.type === 'Identifier') {
            if (node.name === 'bold') {
                item.data = {
                    type: 'Number',
                    loc: node.loc,
                    value: '700'
                };
            } else if (node.name === 'normal') {
                var prev = item.prev;

                if (prev && prev.data.type === 'Operator' && prev.data.value === '/') {
                    this.remove(prev);
                }

                this.remove(item);
            } else if (node.name === 'medium') {
                var next = item.next;

                if (!next || next.data.type !== 'Operator') {
                    this.remove(item);
                }
            }
        }
    });

    // remove redundant spaces
    list.each(function(node, item) {
        if (node.type === 'WhiteSpace') {
            if (!item.prev || !item.next || item.next.data.type === 'WhiteSpace') {
                this.remove(item);
            }
        }
    });

    if (list.isEmpty()) {
        list.insert(list.createItem({
            type: 'Identifier',
            name: 'normal'
        }));
    }
};
�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/restructure/1-mergeAtrule.js��������������������������������������������������������������������0000644�����������������00000005340�15120036665�0012657 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var List = require('css-tree').List;
var resolveKeyword = require('css-tree').keyword;
var hasOwnProperty = Object.prototype.hasOwnProperty;
var walk = require('css-tree').walk;

function addRuleToMap(map, item, list, single) {
    var node = item.data;
    var name = resolveKeyword(node.name).basename;
    var id = node.name.toLowerCase() + '/' + (node.prelude ? node.prelude.id : null);

    if (!hasOwnProperty.call(map, name)) {
        map[name] = Object.create(null);
    }

    if (single) {
        delete map[name][id];
    }

    if (!hasOwnProperty.call(map[name], id)) {
        map[name][id] = new List();
    }

    map[name][id].append(list.remove(item));
}

function relocateAtrules(ast, options) {
    var collected = Object.create(null);
    var topInjectPoint = null;

    ast.children.each(function(node, item, list) {
        if (node.type === 'Atrule') {
            var name = resolveKeyword(node.name).basename;

            switch (name) {
                case 'keyframes':
                    addRuleToMap(collected, item, list, true);
                    return;

                case 'media':
                    if (options.forceMediaMerge) {
                        addRuleToMap(collected, item, list, false);
                        return;
                    }
                    break;
            }

            if (topInjectPoint === null &&
                name !== 'charset' &&
                name !== 'import') {
                topInjectPoint = item;
            }
        } else {
            if (topInjectPoint === null) {
                topInjectPoint = item;
            }
        }
    });

    for (var atrule in collected) {
        for (var id in collected[atrule]) {
            ast.children.insertList(
                collected[atrule][id],
                atrule === 'media' ? null : topInjectPoint
            );
        }
    }
};

function isMediaRule(node) {
    return node.type === 'Atrule' && node.name === 'media';
}

function processAtrule(node, item, list) {
    if (!isMediaRule(node)) {
        return;
    }

    var prev = item.prev && item.prev.data;

    if (!prev || !isMediaRule(prev)) {
        return;
    }

    // merge @media with same query
    if (node.prelude &&
        prev.prelude &&
        node.prelude.id === prev.prelude.id) {
        prev.block.children.appendList(node.block.children);
        list.remove(item);

        // TODO: use it when we can refer to several points in source
        // prev.loc = {
        //     primary: prev.loc,
        //     merged: node.loc
        // };
    }
}

module.exports = function rejoinAtrule(ast, options) {
    relocateAtrules(ast, options);

    walk(ast, {
        visit: 'Atrule',
        reverse: true,
        enter: processAtrule
    });
};
������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/restructure/2-initialMergeRuleset.js������������������������������������������������������������0000644�����������������00000003066�15120036665�0014364 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var walk = require('css-tree').walk;
var utils = require('./utils');

function processRule(node, item, list) {
    var selectors = node.prelude.children;
    var declarations = node.block.children;

    list.prevUntil(item.prev, function(prev) {
        // skip non-ruleset node if safe
        if (prev.type !== 'Rule') {
            return utils.unsafeToSkipNode.call(selectors, prev);
        }

        var prevSelectors = prev.prelude.children;
        var prevDeclarations = prev.block.children;

        // try to join rulesets with equal pseudo signature
        if (node.pseudoSignature === prev.pseudoSignature) {
            // try to join by selectors
            if (utils.isEqualSelectors(prevSelectors, selectors)) {
                prevDeclarations.appendList(declarations);
                list.remove(item);
                return true;
            }

            // try to join by declarations
            if (utils.isEqualDeclarations(declarations, prevDeclarations)) {
                utils.addSelectors(prevSelectors, selectors);
                list.remove(item);
                return true;
            }
        }

        // go to prev ruleset if has no selector similarities
        return utils.hasSimilarSelectors(selectors, prevSelectors);
    });
}

// NOTE: direction should be left to right, since rulesets merge to left
// ruleset. When direction right to left unmerged rulesets may prevent lookup
// TODO: remove initial merge
module.exports = function initialMergeRule(ast) {
    walk(ast, {
        visit: 'Rule',
        enter: processRule
    });
};
��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/restructure/3-disjoinRuleset.js�����������������������������������������������������������������0000644�����������������00000002152�15120036665�0013406 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var List = require('css-tree').List;
var walk = require('css-tree').walk;

function processRule(node, item, list) {
    var selectors = node.prelude.children;

    // generate new rule sets:
    // .a, .b { color: red; }
    // ->
    // .a { color: red; }
    // .b { color: red; }

    // while there are more than 1 simple selector split for rulesets
    while (selectors.head !== selectors.tail) {
        var newSelectors = new List();
        newSelectors.insert(selectors.remove(selectors.head));

        list.insert(list.createItem({
            type: 'Rule',
            loc: node.loc,
            prelude: {
                type: 'SelectorList',
                loc: node.prelude.loc,
                children: newSelectors
            },
            block: {
                type: 'Block',
                loc: node.block.loc,
                children: node.block.children.copy()
            },
            pseudoSignature: node.pseudoSignature
        }), item);
    }
}

module.exports = function disjoinRule(ast) {
    walk(ast, {
        visit: 'Rule',
        reverse: true,
        enter: processRule
    });
};
����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/restructure/4-restructShorthand.js��������������������������������������������������������������0000644�����������������00000026462�15120036665�0014144 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var List = require('css-tree').List;
var generate = require('css-tree').generate;
var walk = require('css-tree').walk;

var REPLACE = 1;
var REMOVE = 2;
var TOP = 0;
var RIGHT = 1;
var BOTTOM = 2;
var LEFT = 3;
var SIDES = ['top', 'right', 'bottom', 'left'];
var SIDE = {
    'margin-top': 'top',
    'margin-right': 'right',
    'margin-bottom': 'bottom',
    'margin-left': 'left',

    'padding-top': 'top',
    'padding-right': 'right',
    'padding-bottom': 'bottom',
    'padding-left': 'left',

    'border-top-color': 'top',
    'border-right-color': 'right',
    'border-bottom-color': 'bottom',
    'border-left-color': 'left',
    'border-top-width': 'top',
    'border-right-width': 'right',
    'border-bottom-width': 'bottom',
    'border-left-width': 'left',
    'border-top-style': 'top',
    'border-right-style': 'right',
    'border-bottom-style': 'bottom',
    'border-left-style': 'left'
};
var MAIN_PROPERTY = {
    'margin': 'margin',
    'margin-top': 'margin',
    'margin-right': 'margin',
    'margin-bottom': 'margin',
    'margin-left': 'margin',

    'padding': 'padding',
    'padding-top': 'padding',
    'padding-right': 'padding',
    'padding-bottom': 'padding',
    'padding-left': 'padding',

    'border-color': 'border-color',
    'border-top-color': 'border-color',
    'border-right-color': 'border-color',
    'border-bottom-color': 'border-color',
    'border-left-color': 'border-color',
    'border-width': 'border-width',
    'border-top-width': 'border-width',
    'border-right-width': 'border-width',
    'border-bottom-width': 'border-width',
    'border-left-width': 'border-width',
    'border-style': 'border-style',
    'border-top-style': 'border-style',
    'border-right-style': 'border-style',
    'border-bottom-style': 'border-style',
    'border-left-style': 'border-style'
};

function TRBL(name) {
    this.name = name;
    this.loc = null;
    this.iehack = undefined;
    this.sides = {
        'top': null,
        'right': null,
        'bottom': null,
        'left': null
    };
}

TRBL.prototype.getValueSequence = function(declaration, count) {
    var values = [];
    var iehack = '';
    var hasBadValues = declaration.value.type !== 'Value' || declaration.value.children.some(function(child) {
        var special = false;

        switch (child.type) {
            case 'Identifier':
                switch (child.name) {
                    case '\\0':
                    case '\\9':
                        iehack = child.name;
                        return;

                    case 'inherit':
                    case 'initial':
                    case 'unset':
                    case 'revert':
                        special = child.name;
                        break;
                }
                break;

            case 'Dimension':
                switch (child.unit) {
                    // is not supported until IE11
                    case 'rem':

                    // v* units is too buggy across browsers and better
                    // don't merge values with those units
                    case 'vw':
                    case 'vh':
                    case 'vmin':
                    case 'vmax':
                    case 'vm': // IE9 supporting "vm" instead of "vmin".
                        special = child.unit;
                        break;
                }
                break;

            case 'Hash': // color
            case 'Number':
            case 'Percentage':
                break;

            case 'Function':
                if (child.name === 'var') {
                    return true;
                }

                special = child.name;
                break;

            case 'WhiteSpace':
                return false; // ignore space

            default:
                return true;  // bad value
        }

        values.push({
            node: child,
            special: special,
            important: declaration.important
        });
    });

    if (hasBadValues || values.length > count) {
        return false;
    }

    if (typeof this.iehack === 'string' && this.iehack !== iehack) {
        return false;
    }

    this.iehack = iehack; // move outside

    return values;
};

TRBL.prototype.canOverride = function(side, value) {
    var currentValue = this.sides[side];

    return !currentValue || (value.important && !currentValue.important);
};

TRBL.prototype.add = function(name, declaration) {
    function attemptToAdd() {
        var sides = this.sides;
        var side = SIDE[name];

        if (side) {
            if (side in sides === false) {
                return false;
            }

            var values = this.getValueSequence(declaration, 1);

            if (!values || !values.length) {
                return false;
            }

            // can mix only if specials are equal
            for (var key in sides) {
                if (sides[key] !== null && sides[key].special !== values[0].special) {
                    return false;
                }
            }

            if (!this.canOverride(side, values[0])) {
                return true;
            }

            sides[side] = values[0];
            return true;
        } else if (name === this.name) {
            var values = this.getValueSequence(declaration, 4);

            if (!values || !values.length) {
                return false;
            }

            switch (values.length) {
                case 1:
                    values[RIGHT] = values[TOP];
                    values[BOTTOM] = values[TOP];
                    values[LEFT] = values[TOP];
                    break;

                case 2:
                    values[BOTTOM] = values[TOP];
                    values[LEFT] = values[RIGHT];
                    break;

                case 3:
                    values[LEFT] = values[RIGHT];
                    break;
            }

            // can mix only if specials are equal
            for (var i = 0; i < 4; i++) {
                for (var key in sides) {
                    if (sides[key] !== null && sides[key].special !== values[i].special) {
                        return false;
                    }
                }
            }

            for (var i = 0; i < 4; i++) {
                if (this.canOverride(SIDES[i], values[i])) {
                    sides[SIDES[i]] = values[i];
                }
            }

            return true;
        }
    }

    if (!attemptToAdd.call(this)) {
        return false;
    }

    // TODO: use it when we can refer to several points in source
    // if (this.loc) {
    //     this.loc = {
    //         primary: this.loc,
    //         merged: declaration.loc
    //     };
    // } else {
    //     this.loc = declaration.loc;
    // }
    if (!this.loc) {
        this.loc = declaration.loc;
    }

    return true;
};

TRBL.prototype.isOkToMinimize = function() {
    var top = this.sides.top;
    var right = this.sides.right;
    var bottom = this.sides.bottom;
    var left = this.sides.left;

    if (top && right && bottom && left) {
        var important =
            top.important +
            right.important +
            bottom.important +
            left.important;

        return important === 0 || important === 4;
    }

    return false;
};

TRBL.prototype.getValue = function() {
    var result = new List();
    var sides = this.sides;
    var values = [
        sides.top,
        sides.right,
        sides.bottom,
        sides.left
    ];
    var stringValues = [
        generate(sides.top.node),
        generate(sides.right.node),
        generate(sides.bottom.node),
        generate(sides.left.node)
    ];

    if (stringValues[LEFT] === stringValues[RIGHT]) {
        values.pop();
        if (stringValues[BOTTOM] === stringValues[TOP]) {
            values.pop();
            if (stringValues[RIGHT] === stringValues[TOP]) {
                values.pop();
            }
        }
    }

    for (var i = 0; i < values.length; i++) {
        if (i) {
            result.appendData({ type: 'WhiteSpace', value: ' ' });
        }

        result.appendData(values[i].node);
    }

    if (this.iehack) {
        result.appendData({ type: 'WhiteSpace', value: ' ' });
        result.appendData({
            type: 'Identifier',
            loc: null,
            name: this.iehack
        });
    }

    return {
        type: 'Value',
        loc: null,
        children: result
    };
};

TRBL.prototype.getDeclaration = function() {
    return {
        type: 'Declaration',
        loc: this.loc,
        important: this.sides.top.important,
        property: this.name,
        value: this.getValue()
    };
};

function processRule(rule, shorts, shortDeclarations, lastShortSelector) {
    var declarations = rule.block.children;
    var selector = rule.prelude.children.first().id;

    rule.block.children.eachRight(function(declaration, item) {
        var property = declaration.property;

        if (!MAIN_PROPERTY.hasOwnProperty(property)) {
            return;
        }

        var key = MAIN_PROPERTY[property];
        var shorthand;
        var operation;

        if (!lastShortSelector || selector === lastShortSelector) {
            if (key in shorts) {
                operation = REMOVE;
                shorthand = shorts[key];
            }
        }

        if (!shorthand || !shorthand.add(property, declaration)) {
            operation = REPLACE;
            shorthand = new TRBL(key);

            // if can't parse value ignore it and break shorthand children
            if (!shorthand.add(property, declaration)) {
                lastShortSelector = null;
                return;
            }
        }

        shorts[key] = shorthand;
        shortDeclarations.push({
            operation: operation,
            block: declarations,
            item: item,
            shorthand: shorthand
        });

        lastShortSelector = selector;
    });

    return lastShortSelector;
}

function processShorthands(shortDeclarations, markDeclaration) {
    shortDeclarations.forEach(function(item) {
        var shorthand = item.shorthand;

        if (!shorthand.isOkToMinimize()) {
            return;
        }

        if (item.operation === REPLACE) {
            item.item.data = markDeclaration(shorthand.getDeclaration());
        } else {
            item.block.remove(item.item);
        }
    });
}

module.exports = function restructBlock(ast, indexer) {
    var stylesheetMap = {};
    var shortDeclarations = [];

    walk(ast, {
        visit: 'Rule',
        reverse: true,
        enter: function(node) {
            var stylesheet = this.block || this.stylesheet;
            var ruleId = (node.pseudoSignature || '') + '|' + node.prelude.children.first().id;
            var ruleMap;
            var shorts;

            if (!stylesheetMap.hasOwnProperty(stylesheet.id)) {
                ruleMap = {
                    lastShortSelector: null
                };
                stylesheetMap[stylesheet.id] = ruleMap;
            } else {
                ruleMap = stylesheetMap[stylesheet.id];
            }

            if (ruleMap.hasOwnProperty(ruleId)) {
                shorts = ruleMap[ruleId];
            } else {
                shorts = {};
                ruleMap[ruleId] = shorts;
            }

            ruleMap.lastShortSelector = processRule.call(this, node, shorts, shortDeclarations, ruleMap.lastShortSelector);
        }
    });

    processShorthands(shortDeclarations, indexer.declaration);
};
��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/restructure/6-restructBlock.js������������������������������������������������������������������0000644�����������������00000025177�15120036665�0013250 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var resolveProperty = require('css-tree').property;
var resolveKeyword = require('css-tree').keyword;
var walk = require('css-tree').walk;
var generate = require('css-tree').generate;
var fingerprintId = 1;
var dontRestructure = {
    'src': 1 // https://github.com/afelix/csso/issues/50
};

var DONT_MIX_VALUE = {
    // https://developer.mozilla.org/en-US/docs/Web/CSS/display#Browser_compatibility
    'display': /table|ruby|flex|-(flex)?box$|grid|contents|run-in/i,
    // https://developer.mozilla.org/en/docs/Web/CSS/text-align
    'text-align': /^(start|end|match-parent|justify-all)$/i
};

var SAFE_VALUES = {
    cursor: [
        'auto', 'crosshair', 'default', 'move', 'text', 'wait', 'help',
        'n-resize', 'e-resize', 's-resize', 'w-resize',
        'ne-resize', 'nw-resize', 'se-resize', 'sw-resize',
        'pointer', 'progress', 'not-allowed', 'no-drop', 'vertical-text', 'all-scroll',
        'col-resize', 'row-resize'
    ],
    overflow: [
        'hidden', 'visible', 'scroll', 'auto'
    ],
    position: [
        'static', 'relative', 'absolute', 'fixed'
    ]
};

var NEEDLESS_TABLE = {
    'border-width': ['border'],
    'border-style': ['border'],
    'border-color': ['border'],
    'border-top': ['border'],
    'border-right': ['border'],
    'border-bottom': ['border'],
    'border-left': ['border'],
    'border-top-width': ['border-top', 'border-width', 'border'],
    'border-right-width': ['border-right', 'border-width', 'border'],
    'border-bottom-width': ['border-bottom', 'border-width', 'border'],
    'border-left-width': ['border-left', 'border-width', 'border'],
    'border-top-style': ['border-top', 'border-style', 'border'],
    'border-right-style': ['border-right', 'border-style', 'border'],
    'border-bottom-style': ['border-bottom', 'border-style', 'border'],
    'border-left-style': ['border-left', 'border-style', 'border'],
    'border-top-color': ['border-top', 'border-color', 'border'],
    'border-right-color': ['border-right', 'border-color', 'border'],
    'border-bottom-color': ['border-bottom', 'border-color', 'border'],
    'border-left-color': ['border-left', 'border-color', 'border'],
    'margin-top': ['margin'],
    'margin-right': ['margin'],
    'margin-bottom': ['margin'],
    'margin-left': ['margin'],
    'padding-top': ['padding'],
    'padding-right': ['padding'],
    'padding-bottom': ['padding'],
    'padding-left': ['padding'],
    'font-style': ['font'],
    'font-variant': ['font'],
    'font-weight': ['font'],
    'font-size': ['font'],
    'font-family': ['font'],
    'list-style-type': ['list-style'],
    'list-style-position': ['list-style'],
    'list-style-image': ['list-style']
};

function getPropertyFingerprint(propertyName, declaration, fingerprints) {
    var realName = resolveProperty(propertyName).basename;

    if (realName === 'background') {
        return propertyName + ':' + generate(declaration.value);
    }

    var declarationId = declaration.id;
    var fingerprint = fingerprints[declarationId];

    if (!fingerprint) {
        switch (declaration.value.type) {
            case 'Value':
                var vendorId = '';
                var iehack = '';
                var special = {};
                var raw = false;

                declaration.value.children.each(function walk(node) {
                    switch (node.type) {
                        case 'Value':
                        case 'Brackets':
                        case 'Parentheses':
                            node.children.each(walk);
                            break;

                        case 'Raw':
                            raw = true;
                            break;

                        case 'Identifier':
                            var name = node.name;

                            if (!vendorId) {
                                vendorId = resolveKeyword(name).vendor;
                            }

                            if (/\\[09]/.test(name)) {
                                iehack = RegExp.lastMatch;
                            }

                            if (SAFE_VALUES.hasOwnProperty(realName)) {
                                if (SAFE_VALUES[realName].indexOf(name) === -1) {
                                    special[name] = true;
                                }
                            } else if (DONT_MIX_VALUE.hasOwnProperty(realName)) {
                                if (DONT_MIX_VALUE[realName].test(name)) {
                                    special[name] = true;
                                }
                            }

                            break;

                        case 'Function':
                            var name = node.name;

                            if (!vendorId) {
                                vendorId = resolveKeyword(name).vendor;
                            }

                            if (name === 'rect') {
                                // there are 2 forms of rect:
                                //   rect(<top>, <right>, <bottom>, <left>) - standart
                                //   rect(<top> <right> <bottom> <left>) – backwards compatible syntax
                                // only the same form values can be merged
                                var hasComma = node.children.some(function(node) {
                                    return node.type === 'Operator' && node.value === ',';
                                });
                                if (!hasComma) {
                                    name = 'rect-backward';
                                }
                            }

                            special[name + '()'] = true;

                            // check nested tokens too
                            node.children.each(walk);

                            break;

                        case 'Dimension':
                            var unit = node.unit;

                            if (/\\[09]/.test(unit)) {
                                iehack = RegExp.lastMatch;
                            }

                            switch (unit) {
                                // is not supported until IE11
                                case 'rem':

                                // v* units is too buggy across browsers and better
                                // don't merge values with those units
                                case 'vw':
                                case 'vh':
                                case 'vmin':
                                case 'vmax':
                                case 'vm': // IE9 supporting "vm" instead of "vmin".
                                    special[unit] = true;
                                    break;
                            }
                            break;
                    }
                });

                fingerprint = raw
                    ? '!' + fingerprintId++
                    : '!' + Object.keys(special).sort() + '|' + iehack + vendorId;
                break;

            case 'Raw':
                fingerprint = '!' + declaration.value.value;
                break;

            default:
                fingerprint = generate(declaration.value);
        }

        fingerprints[declarationId] = fingerprint;
    }

    return propertyName + fingerprint;
}

function needless(props, declaration, fingerprints) {
    var property = resolveProperty(declaration.property);

    if (NEEDLESS_TABLE.hasOwnProperty(property.basename)) {
        var table = NEEDLESS_TABLE[property.basename];

        for (var i = 0; i < table.length; i++) {
            var ppre = getPropertyFingerprint(property.prefix + table[i], declaration, fingerprints);
            var prev = props.hasOwnProperty(ppre) ? props[ppre] : null;

            if (prev && (!declaration.important || prev.item.data.important)) {
                return prev;
            }
        }
    }
}

function processRule(rule, item, list, props, fingerprints) {
    var declarations = rule.block.children;

    declarations.eachRight(function(declaration, declarationItem) {
        var property = declaration.property;
        var fingerprint = getPropertyFingerprint(property, declaration, fingerprints);
        var prev = props[fingerprint];

        if (prev && !dontRestructure.hasOwnProperty(property)) {
            if (declaration.important && !prev.item.data.important) {
                props[fingerprint] = {
                    block: declarations,
                    item: declarationItem
                };

                prev.block.remove(prev.item);

                // TODO: use it when we can refer to several points in source
                // declaration.loc = {
                //     primary: declaration.loc,
                //     merged: prev.item.data.loc
                // };
            } else {
                declarations.remove(declarationItem);

                // TODO: use it when we can refer to several points in source
                // prev.item.data.loc = {
                //     primary: prev.item.data.loc,
                //     merged: declaration.loc
                // };
            }
        } else {
            var prev = needless(props, declaration, fingerprints);

            if (prev) {
                declarations.remove(declarationItem);

                // TODO: use it when we can refer to several points in source
                // prev.item.data.loc = {
                //     primary: prev.item.data.loc,
                //     merged: declaration.loc
                // };
            } else {
                declaration.fingerprint = fingerprint;

                props[fingerprint] = {
                    block: declarations,
                    item: declarationItem
                };
            }
        }
    });

    if (declarations.isEmpty()) {
        list.remove(item);
    }
}

module.exports = function restructBlock(ast) {
    var stylesheetMap = {};
    var fingerprints = Object.create(null);

    walk(ast, {
        visit: 'Rule',
        reverse: true,
        enter: function(node, item, list) {
            var stylesheet = this.block || this.stylesheet;
            var ruleId = (node.pseudoSignature || '') + '|' + node.prelude.children.first().id;
            var ruleMap;
            var props;

            if (!stylesheetMap.hasOwnProperty(stylesheet.id)) {
                ruleMap = {};
                stylesheetMap[stylesheet.id] = ruleMap;
            } else {
                ruleMap = stylesheetMap[stylesheet.id];
            }

            if (ruleMap.hasOwnProperty(ruleId)) {
                props = ruleMap[ruleId];
            } else {
                props = {};
                ruleMap[ruleId] = props;
            }

            processRule.call(this, node, item, list, props, fingerprints);
        }
    });
};
�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/restructure/7-mergeRuleset.js�������������������������������������������������������������������0000644�����������������00000004724�15120036665�0013061 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var walk = require('css-tree').walk;
var utils = require('./utils');

/*
    At this step all rules has single simple selector. We try to join by equal
    declaration blocks to first rule, e.g.

    .a { color: red }
    b { ... }
    .b { color: red }
    ->
    .a, .b { color: red }
    b { ... }
*/

function processRule(node, item, list) {
    var selectors = node.prelude.children;
    var declarations = node.block.children;
    var nodeCompareMarker = selectors.first().compareMarker;
    var skippedCompareMarkers = {};

    list.nextUntil(item.next, function(next, nextItem) {
        // skip non-ruleset node if safe
        if (next.type !== 'Rule') {
            return utils.unsafeToSkipNode.call(selectors, next);
        }

        if (node.pseudoSignature !== next.pseudoSignature) {
            return true;
        }

        var nextFirstSelector = next.prelude.children.head;
        var nextDeclarations = next.block.children;
        var nextCompareMarker = nextFirstSelector.data.compareMarker;

        // if next ruleset has same marked as one of skipped then stop joining
        if (nextCompareMarker in skippedCompareMarkers) {
            return true;
        }

        // try to join by selectors
        if (selectors.head === selectors.tail) {
            if (selectors.first().id === nextFirstSelector.data.id) {
                declarations.appendList(nextDeclarations);
                list.remove(nextItem);
                return;
            }
        }

        // try to join by properties
        if (utils.isEqualDeclarations(declarations, nextDeclarations)) {
            var nextStr = nextFirstSelector.data.id;

            selectors.some(function(data, item) {
                var curStr = data.id;

                if (nextStr < curStr) {
                    selectors.insert(nextFirstSelector, item);
                    return true;
                }

                if (!item.next) {
                    selectors.insert(nextFirstSelector);
                    return true;
                }
            });

            list.remove(nextItem);
            return;
        }

        // go to next ruleset if current one can be skipped (has no equal specificity nor element selector)
        if (nextCompareMarker === nodeCompareMarker) {
            return true;
        }

        skippedCompareMarkers[nextCompareMarker] = true;
    });
}

module.exports = function mergeRule(ast) {
    walk(ast, {
        visit: 'Rule',
        enter: processRule
    });
};
��������������������������������������������lib/restructure/8-restructRuleset.js����������������������������������������������������������������0000644�����������������00000014465�15120036665�0013641 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var List = require('css-tree').List;
var walk = require('css-tree').walk;
var utils = require('./utils');

function calcSelectorLength(list) {
    var length = 0;

    list.each(function(data) {
        length += data.id.length + 1;
    });

    return length - 1;
}

function calcDeclarationsLength(tokens) {
    var length = 0;

    for (var i = 0; i < tokens.length; i++) {
        length += tokens[i].length;
    }

    return (
        length +          // declarations
        tokens.length - 1 // delimeters
    );
}

function processRule(node, item, list) {
    var avoidRulesMerge = this.block !== null ? this.block.avoidRulesMerge : false;
    var selectors = node.prelude.children;
    var block = node.block;
    var disallowDownMarkers = Object.create(null);
    var allowMergeUp = true;
    var allowMergeDown = true;

    list.prevUntil(item.prev, function(prev, prevItem) {
        var prevBlock = prev.block;
        var prevType = prev.type;

        if (prevType !== 'Rule') {
            var unsafe = utils.unsafeToSkipNode.call(selectors, prev);

            if (!unsafe && prevType === 'Atrule' && prevBlock) {
                walk(prevBlock, {
                    visit: 'Rule',
                    enter: function(node) {
                        node.prelude.children.each(function(data) {
                            disallowDownMarkers[data.compareMarker] = true;
                        });
                    }
                });
            }

            return unsafe;
        }

        var prevSelectors = prev.prelude.children;

        if (node.pseudoSignature !== prev.pseudoSignature) {
            return true;
        }

        allowMergeDown = !prevSelectors.some(function(selector) {
            return selector.compareMarker in disallowDownMarkers;
        });

        // try prev ruleset if simpleselectors has no equal specifity and element selector
        if (!allowMergeDown && !allowMergeUp) {
            return true;
        }

        // try to join by selectors
        if (allowMergeUp && utils.isEqualSelectors(prevSelectors, selectors)) {
            prevBlock.children.appendList(block.children);
            list.remove(item);
            return true;
        }

        // try to join by properties
        var diff = utils.compareDeclarations(block.children, prevBlock.children);

        // console.log(diff.eq, diff.ne1, diff.ne2);

        if (diff.eq.length) {
            if (!diff.ne1.length && !diff.ne2.length) {
                // equal blocks
                if (allowMergeDown) {
                    utils.addSelectors(selectors, prevSelectors);
                    list.remove(prevItem);
                }

                return true;
            } else if (!avoidRulesMerge) { /* probably we don't need to prevent those merges for @keyframes
                                              TODO: need to be checked */

                if (diff.ne1.length && !diff.ne2.length) {
                    // prevBlock is subset block
                    var selectorLength = calcSelectorLength(selectors);
                    var blockLength = calcDeclarationsLength(diff.eq); // declarations length

                    if (allowMergeUp && selectorLength < blockLength) {
                        utils.addSelectors(prevSelectors, selectors);
                        block.children = new List().fromArray(diff.ne1);
                    }
                } else if (!diff.ne1.length && diff.ne2.length) {
                    // node is subset of prevBlock
                    var selectorLength = calcSelectorLength(prevSelectors);
                    var blockLength = calcDeclarationsLength(diff.eq); // declarations length

                    if (allowMergeDown && selectorLength < blockLength) {
                        utils.addSelectors(selectors, prevSelectors);
                        prevBlock.children = new List().fromArray(diff.ne2);
                    }
                } else {
                    // diff.ne1.length && diff.ne2.length
                    // extract equal block
                    var newSelector = {
                        type: 'SelectorList',
                        loc: null,
                        children: utils.addSelectors(prevSelectors.copy(), selectors)
                    };
                    var newBlockLength = calcSelectorLength(newSelector.children) + 2; // selectors length + curly braces length
                    var blockLength = calcDeclarationsLength(diff.eq); // declarations length

                    // create new ruleset if declarations length greater than
                    // ruleset description overhead
                    if (blockLength >= newBlockLength) {
                        var newItem = list.createItem({
                            type: 'Rule',
                            loc: null,
                            prelude: newSelector,
                            block: {
                                type: 'Block',
                                loc: null,
                                children: new List().fromArray(diff.eq)
                            },
                            pseudoSignature: node.pseudoSignature
                        });

                        block.children = new List().fromArray(diff.ne1);
                        prevBlock.children = new List().fromArray(diff.ne2overrided);

                        if (allowMergeUp) {
                            list.insert(newItem, prevItem);
                        } else {
                            list.insert(newItem, item);
                        }

                        return true;
                    }
                }
            }
        }

        if (allowMergeUp) {
            // TODO: disallow up merge only if any property interception only (i.e. diff.ne2overrided.length > 0);
            // await property families to find property interception correctly
            allowMergeUp = !prevSelectors.some(function(prevSelector) {
                return selectors.some(function(selector) {
                    return selector.compareMarker === prevSelector.compareMarker;
                });
            });
        }

        prevSelectors.each(function(data) {
            disallowDownMarkers[data.compareMarker] = true;
        });
    });
}

module.exports = function restructRule(ast) {
    walk(ast, {
        visit: 'Rule',
        reverse: true,
        enter: processRule
    });
};
�����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/restructure/index.js����������������������������������������������������������������������������0000644�����������������00000002065�15120036665�0011355 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var prepare = require('./prepare/index');
var mergeAtrule = require('./1-mergeAtrule');
var initialMergeRuleset = require('./2-initialMergeRuleset');
var disjoinRuleset = require('./3-disjoinRuleset');
var restructShorthand = require('./4-restructShorthand');
var restructBlock = require('./6-restructBlock');
var mergeRuleset = require('./7-mergeRuleset');
var restructRuleset = require('./8-restructRuleset');

module.exports = function(ast, options) {
    // prepare ast for restructing
    var indexer = prepare(ast, options);
    options.logger('prepare', ast);

    mergeAtrule(ast, options);
    options.logger('mergeAtrule', ast);

    initialMergeRuleset(ast);
    options.logger('initialMergeRuleset', ast);

    disjoinRuleset(ast);
    options.logger('disjoinRuleset', ast);

    restructShorthand(ast, indexer);
    options.logger('restructShorthand', ast);

    restructBlock(ast);
    options.logger('restructBlock', ast);

    mergeRuleset(ast);
    options.logger('mergeRuleset', ast);

    restructRuleset(ast);
    options.logger('restructRuleset', ast);
};
���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/restructure/prepare/createDeclarationIndexer.js�������������������������������������������������0000644�����������������00000001126�15120036665�0016631 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var generate = require('css-tree').generate;

function Index() {
    this.seed = 0;
    this.map = Object.create(null);
}

Index.prototype.resolve = function(str) {
    var index = this.map[str];

    if (!index) {
        index = ++this.seed;
        this.map[str] = index;
    }

    return index;
};

module.exports = function createDeclarationIndexer() {
    var ids = new Index();

    return function markDeclaration(node) {
        var id = generate(node);

        node.id = ids.resolve(id);
        node.length = id.length;
        node.fingerprint = null;

        return node;
    };
};
������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/restructure/prepare/index.js��������������������������������������������������������������������0000644�����������������00000003130�15120036665�0013005 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var resolveKeyword = require('css-tree').keyword;
var walk = require('css-tree').walk;
var generate = require('css-tree').generate;
var createDeclarationIndexer = require('./createDeclarationIndexer');
var processSelector = require('./processSelector');

module.exports = function prepare(ast, options) {
    var markDeclaration = createDeclarationIndexer();

    walk(ast, {
        visit: 'Rule',
        enter: function processRule(node) {
            node.block.children.each(markDeclaration);
            processSelector(node, options.usage);
        }
    });

    walk(ast, {
        visit: 'Atrule',
        enter: function(node) {
            if (node.prelude) {
                node.prelude.id = null; // pre-init property to avoid multiple hidden class for generate
                node.prelude.id = generate(node.prelude);
            }

            // compare keyframe selectors by its values
            // NOTE: still no clarification about problems with keyframes selector grouping (issue #197)
            if (resolveKeyword(node.name).basename === 'keyframes') {
                node.block.avoidRulesMerge = true;  /* probably we don't need to prevent those merges for @keyframes
                                                       TODO: need to be checked */
                node.block.children.each(function(rule) {
                    rule.prelude.children.each(function(simpleselector) {
                        simpleselector.compareMarker = simpleselector.id;
                    });
                });
            }
        }
    });

    return {
        declaration: markDeclaration
    };
};
����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������lib/restructure/prepare/processSelector.js����������������������������������������������������������0000644�����������������00000005607�15120036665�0015070 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var generate = require('css-tree').generate;
var specificity = require('./specificity');

var nonFreezePseudoElements = {
    'first-letter': true,
    'first-line': true,
    'after': true,
    'before': true
};
var nonFreezePseudoClasses = {
    'link': true,
    'visited': true,
    'hover': true,
    'active': true,
    'first-letter': true,
    'first-line': true,
    'after': true,
    'before': true
};

module.exports = function freeze(node, usageData) {
    var pseudos = Object.create(null);
    var hasPseudo = false;

    node.prelude.children.each(function(simpleSelector) {
        var tagName = '*';
        var scope = 0;

        simpleSelector.children.each(function(node) {
            switch (node.type) {
                case 'ClassSelector':
                    if (usageData && usageData.scopes) {
                        var classScope = usageData.scopes[node.name] || 0;

                        if (scope !== 0 && classScope !== scope) {
                            throw new Error('Selector can\'t has classes from different scopes: ' + generate(simpleSelector));
                        }

                        scope = classScope;
                    }
                    break;

                case 'PseudoClassSelector':
                    var name = node.name.toLowerCase();

                    if (!nonFreezePseudoClasses.hasOwnProperty(name)) {
                        pseudos[':' + name] = true;
                        hasPseudo = true;
                    }
                    break;

                case 'PseudoElementSelector':
                    var name = node.name.toLowerCase();

                    if (!nonFreezePseudoElements.hasOwnProperty(name)) {
                        pseudos['::' + name] = true;
                        hasPseudo = true;
                    }
                    break;

                case 'TypeSelector':
                    tagName = node.name.toLowerCase();
                    break;

                case 'AttributeSelector':
                    if (node.flags) {
                        pseudos['[' + node.flags.toLowerCase() + ']'] = true;
                        hasPseudo = true;
                    }
                    break;

                case 'WhiteSpace':
                case 'Combinator':
                    tagName = '*';
                    break;
            }
        });

        simpleSelector.compareMarker = specificity(simpleSelector).toString();
        simpleSelector.id = null; // pre-init property to avoid multiple hidden class
        simpleSelector.id = generate(simpleSelector);

        if (scope) {
            simpleSelector.compareMarker += ':' + scope;
        }

        if (tagName !== '*') {
            simpleSelector.compareMarker += ',' + tagName;
        }
    });

    // add property to all rule nodes to avoid multiple hidden class
    node.pseudoSignature = hasPseudo && Object.keys(pseudos).sort().join(',');
};
�������������������������������������������������������������������������������������������������������������������������lib/restructure/prepare/specificity.js��������������������������������������������������������������0000644�����������������00000002662�15120036665�0014222 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������module.exports = function specificity(simpleSelector) {
    var A = 0;
    var B = 0;
    var C = 0;

    simpleSelector.children.each(function walk(node) {
        switch (node.type) {
            case 'SelectorList':
            case 'Selector':
                node.children.each(walk);
                break;

            case 'IdSelector':
                A++;
                break;

            case 'ClassSelector':
            case 'AttributeSelector':
                B++;
                break;

            case 'PseudoClassSelector':
                switch (node.name.toLowerCase()) {
                    case 'not':
                        node.children.each(walk);
                        break;

                    case 'before':
                    case 'after':
                    case 'first-line':
                    case 'first-letter':
                        C++;
                        break;

                    // TODO: support for :nth-*(.. of <SelectorList>), :matches(), :has()
                    default:
                        B++;
                }
                break;

            case 'PseudoElementSelector':
                C++;
                break;

            case 'TypeSelector':
                // ignore universal selector
                if (node.name.charAt(node.name.length - 1) !== '*') {
                    C++;
                }
                break;

        }
    });

    return [A, B, C];
};
������������������������������������������������������������������������������lib/restructure/utils.js����������������������������������������������������������������������������0000644�����������������00000007601�15120036665�0011407 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var hasOwnProperty = Object.prototype.hasOwnProperty;

function isEqualSelectors(a, b) {
    var cursor1 = a.head;
    var cursor2 = b.head;

    while (cursor1 !== null && cursor2 !== null && cursor1.data.id === cursor2.data.id) {
        cursor1 = cursor1.next;
        cursor2 = cursor2.next;
    }

    return cursor1 === null && cursor2 === null;
}

function isEqualDeclarations(a, b) {
    var cursor1 = a.head;
    var cursor2 = b.head;

    while (cursor1 !== null && cursor2 !== null && cursor1.data.id === cursor2.data.id) {
        cursor1 = cursor1.next;
        cursor2 = cursor2.next;
    }

    return cursor1 === null && cursor2 === null;
}

function compareDeclarations(declarations1, declarations2) {
    var result = {
        eq: [],
        ne1: [],
        ne2: [],
        ne2overrided: []
    };

    var fingerprints = Object.create(null);
    var declarations2hash = Object.create(null);

    for (var cursor = declarations2.head; cursor; cursor = cursor.next)  {
        declarations2hash[cursor.data.id] = true;
    }

    for (var cursor = declarations1.head; cursor; cursor = cursor.next)  {
        var data = cursor.data;

        if (data.fingerprint) {
            fingerprints[data.fingerprint] = data.important;
        }

        if (declarations2hash[data.id]) {
            declarations2hash[data.id] = false;
            result.eq.push(data);
        } else {
            result.ne1.push(data);
        }
    }

    for (var cursor = declarations2.head; cursor; cursor = cursor.next)  {
        var data = cursor.data;

        if (declarations2hash[data.id]) {
            // when declarations1 has an overriding declaration, this is not a difference
            // unless no !important is used on prev and !important is used on the following
            if (!hasOwnProperty.call(fingerprints, data.fingerprint) ||
                (!fingerprints[data.fingerprint] && data.important)) {
                result.ne2.push(data);
            }

            result.ne2overrided.push(data);
        }
    }

    return result;
}

function addSelectors(dest, source) {
    source.each(function(sourceData) {
        var newStr = sourceData.id;
        var cursor = dest.head;

        while (cursor) {
            var nextStr = cursor.data.id;

            if (nextStr === newStr) {
                return;
            }

            if (nextStr > newStr) {
                break;
            }

            cursor = cursor.next;
        }

        dest.insert(dest.createItem(sourceData), cursor);
    });

    return dest;
}

// check if simpleselectors has no equal specificity and element selector
function hasSimilarSelectors(selectors1, selectors2) {
    var cursor1 = selectors1.head;

    while (cursor1 !== null) {
        var cursor2 = selectors2.head;

        while (cursor2 !== null) {
            if (cursor1.data.compareMarker === cursor2.data.compareMarker) {
                return true;
            }

            cursor2 = cursor2.next;
        }

        cursor1 = cursor1.next;
    }

    return false;
}

// test node can't to be skipped
function unsafeToSkipNode(node) {
    switch (node.type) {
        case 'Rule':
            // unsafe skip ruleset with selector similarities
            return hasSimilarSelectors(node.prelude.children, this);

        case 'Atrule':
            // can skip at-rules with blocks
            if (node.block) {
                // unsafe skip at-rule if block contains something unsafe to skip
                return node.block.children.some(unsafeToSkipNode, this);
            }
            break;

        case 'Declaration':
            return false;
    }

    // unsafe by default
    return true;
}

module.exports = {
    isEqualSelectors: isEqualSelectors,
    isEqualDeclarations: isEqualDeclarations,
    compareDeclarations: compareDeclarations,
    addSelectors: addSelectors,
    hasSimilarSelectors: hasSimilarSelectors,
    unsafeToSkipNode: unsafeToSkipNode
};
�������������������������������������������������������������������������������������������������������������������������������lib/usage.js����������������������������������������������������������������������������������������0000644�����������������00000003151�15120036665�0006760 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������var hasOwnProperty = Object.prototype.hasOwnProperty;

function buildMap(list, caseInsensitive) {
    var map = Object.create(null);

    if (!Array.isArray(list)) {
        return null;
    }

    for (var i = 0; i < list.length; i++) {
        var name = list[i];

        if (caseInsensitive) {
            name = name.toLowerCase();
        }

        map[name] = true;
    }

    return map;
}

function buildList(data) {
    if (!data) {
        return null;
    }

    var tags = buildMap(data.tags, true);
    var ids = buildMap(data.ids);
    var classes = buildMap(data.classes);

    if (tags === null &&
        ids === null &&
        classes === null) {
        return null;
    }

    return {
        tags: tags,
        ids: ids,
        classes: classes
    };
}

function buildIndex(data) {
    var scopes = false;

    if (data.scopes && Array.isArray(data.scopes)) {
        scopes = Object.create(null);

        for (var i = 0; i < data.scopes.length; i++) {
            var list = data.scopes[i];

            if (!list || !Array.isArray(list)) {
                throw new Error('Wrong usage format');
            }

            for (var j = 0; j < list.length; j++) {
                var name = list[j];

                if (hasOwnProperty.call(scopes, name)) {
                    throw new Error('Class can\'t be used for several scopes: ' + name);
                }

                scopes[name] = i + 1;
            }
        }
    }

    return {
        whitelist: buildList(data),
        blacklist: buildList(data.blacklist),
        scopes: scopes
    };
}

module.exports = {
    buildIndex: buildIndex
};
�����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������package.json����������������������������������������������������������������������������������������0000644�����������������00000003464�15120036665�0007045 0����������������������������������������������������������������������������������������������������ustar�00�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������{
  "name": "csso",
  "version": "4.2.0",
  "description": "CSS minifier with structural optimisations",
  "homepage": "https://github.com/css/csso",
  "author": "Sergey Kryzhanovsky <skryzhanovsky@ya.ru> (https://github.com/afelix)",
  "maintainers": [
    {
      "name": "Roman Dvornov",
      "email": "rdvornov@gmail.com",
      "github-username": "lahmatiy"
    }
  ],
  "license": "MIT",
  "repository": "css/csso",
  "bugs": {
    "url": "https://github.com/css/csso/issues"
  },
  "keywords": [
    "css",
    "compress",
    "minifier",
    "minify",
    "optimise",
    "optimisation",
    "csstree"
  ],
  "main": "./lib/index",
  "scripts": {
    "test": "mocha --reporter dot",
    "lint": "eslint lib test",
    "lint-and-test": "npm run lint && npm test",
    "build": "rollup --config && terser dist/csso.js --compress --mangle -o dist/csso.min.js",
    "coverage": "nyc npm test",
    "coveralls": "nyc report --reporter=text-lcov | coveralls",
    "travis": "nyc npm run lint-and-test && npm run coveralls",
    "hydrogen": "node --trace-hydrogen --trace-phase=Z --trace-deopt --code-comments --hydrogen-track-positions --redirect-code-traces --redirect-code-traces-to=code.asm --trace_hydrogen_file=code.cfg --print-opt-code bin/csso --stat -o /dev/null",
    "prepublishOnly": "npm run build"
  },
  "dependencies": {
    "css-tree": "^1.1.2"
  },
  "browser": {
    "css-tree": "css-tree/dist/csstree.min.js"
  },
  "devDependencies": {
    "@rollup/plugin-commonjs": "^11.0.1",
    "@rollup/plugin-json": "^4.0.1",
    "@rollup/plugin-node-resolve": "^7.0.0",
    "coveralls": "^3.0.11",
    "eslint": "^6.8.0",
    "mocha": "^7.1.1",
    "nyc": "^15.0.0",
    "rollup": "^1.29.0",
    "source-map": "^0.6.1",
    "terser": "^4.6.3"
  },
  "engines": {
    "node": ">=8.0.0"
  },
  "files": [
    "dist",
    "lib"
  ]
}
����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������
User / IP	: 216.73.216.143
Host / Server	: 146.88.233.70 / dev.loger.cm
System	: Linux hybrid1120.fr.ns.planethoster.net 3.10.0-957.21.2.el7.x86_64 #1 SMP Wed Jun 5 14:26:44 UTC 2019 x86_64