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- /**
- * Clean-css - https://github.com/clean-css/clean-css
- * Released under the terms of MIT license
- */
- var level0Optimize = require('./optimizer/level-0/optimize');
- var level1Optimize = require('./optimizer/level-1/optimize');
- var level2Optimize = require('./optimizer/level-2/optimize');
- var validator = require('./optimizer/validator');
- var compatibilityFrom = require('./options/compatibility');
- var fetchFrom = require('./options/fetch');
- var formatFrom = require('./options/format').formatFrom;
- var inlineFrom = require('./options/inline');
- var inlineRequestFrom = require('./options/inline-request');
- var inlineTimeoutFrom = require('./options/inline-timeout');
- var OptimizationLevel = require('./options/optimization-level').OptimizationLevel;
- var optimizationLevelFrom = require('./options/optimization-level').optimizationLevelFrom;
- var pluginsFrom = require('./options/plugins');
- var rebaseFrom = require('./options/rebase');
- var rebaseToFrom = require('./options/rebase-to');
- var inputSourceMapTracker = require('./reader/input-source-map-tracker');
- var readSources = require('./reader/read-sources');
- var serializeStyles = require('./writer/simple');
- var serializeStylesAndSourceMap = require('./writer/source-maps');
- var CleanCSS = module.exports = function CleanCSS(options) {
- options = options || {};
- this.options = {
- batch: !!options.batch,
- compatibility: compatibilityFrom(options.compatibility),
- explicitRebaseTo: 'rebaseTo' in options,
- fetch: fetchFrom(options.fetch),
- format: formatFrom(options.format),
- inline: inlineFrom(options.inline),
- inlineRequest: inlineRequestFrom(options.inlineRequest),
- inlineTimeout: inlineTimeoutFrom(options.inlineTimeout),
- level: optimizationLevelFrom(options.level),
- plugins: pluginsFrom(options.plugins),
- rebase: rebaseFrom(options.rebase, options.rebaseTo),
- rebaseTo: rebaseToFrom(options.rebaseTo),
- returnPromise: !!options.returnPromise,
- sourceMap: !!options.sourceMap,
- sourceMapInlineSources: !!options.sourceMapInlineSources
- };
- };
- // for compatibility with optimize-css-assets-webpack-plugin
- CleanCSS.process = function(input, opts) {
- var cleanCss;
- var optsTo = opts.to;
- delete opts.to;
- cleanCss = new CleanCSS(Object.assign({
- returnPromise: true, rebaseTo: optsTo
- }, opts));
- return cleanCss.minify(input)
- .then(function(output) {
- return { css: output.styles };
- });
- };
- CleanCSS.prototype.minify = function(input, maybeSourceMap, maybeCallback) {
- var options = this.options;
- if (options.returnPromise) {
- return new Promise(function(resolve, reject) {
- minifyAll(input, options, maybeSourceMap, function(errors, output) {
- return errors
- ? reject(errors)
- : resolve(output);
- });
- });
- }
- return minifyAll(input, options, maybeSourceMap, maybeCallback);
- };
- function minifyAll(input, options, maybeSourceMap, maybeCallback) {
- if (options.batch && Array.isArray(input)) {
- return minifyInBatchesFromArray(input, options, maybeSourceMap, maybeCallback);
- } if (options.batch && (typeof input == 'object')) {
- return minifyInBatchesFromHash(input, options, maybeSourceMap, maybeCallback);
- }
- return minify(input, options, maybeSourceMap, maybeCallback);
- }
- function minifyInBatchesFromArray(input, options, maybeSourceMap, maybeCallback) {
- var callback = typeof maybeCallback == 'function'
- ? maybeCallback
- : (typeof maybeSourceMap == 'function' ? maybeSourceMap : null);
- var errors = [];
- var outputAsHash = {};
- var inputValue;
- var i, l;
- function whenHashBatchDone(innerErrors, output) {
- outputAsHash = Object.assign(outputAsHash, output);
- if (innerErrors !== null) {
- errors = errors.concat(innerErrors);
- }
- }
- for (i = 0, l = input.length; i < l; i++) {
- if (typeof input[i] == 'object') {
- minifyInBatchesFromHash(input[i], options, whenHashBatchDone);
- } else {
- inputValue = input[i];
- outputAsHash[inputValue] = minify([inputValue], options);
- errors = errors.concat(outputAsHash[inputValue].errors);
- }
- }
- return callback
- ? callback(errors.length > 0 ? errors : null, outputAsHash)
- : outputAsHash;
- }
- function minifyInBatchesFromHash(input, options, maybeSourceMap, maybeCallback) {
- var callback = typeof maybeCallback == 'function'
- ? maybeCallback
- : (typeof maybeSourceMap == 'function' ? maybeSourceMap : null);
- var errors = [];
- var outputAsHash = {};
- var inputKey;
- var inputValue;
- for (inputKey in input) {
- inputValue = input[inputKey];
- outputAsHash[inputKey] = minify(inputValue.styles, options, inputValue.sourceMap);
- errors = errors.concat(outputAsHash[inputKey].errors);
- }
- return callback
- ? callback(errors.length > 0 ? errors : null, outputAsHash)
- : outputAsHash;
- }
- function minify(input, options, maybeSourceMap, maybeCallback) {
- var sourceMap = typeof maybeSourceMap != 'function'
- ? maybeSourceMap
- : null;
- var callback = typeof maybeCallback == 'function'
- ? maybeCallback
- : (typeof maybeSourceMap == 'function' ? maybeSourceMap : null);
- var context = {
- stats: {
- efficiency: 0,
- minifiedSize: 0,
- originalSize: 0,
- startedAt: Date.now(),
- timeSpent: 0
- },
- cache: { specificity: {} },
- errors: [],
- inlinedStylesheets: [],
- inputSourceMapTracker: inputSourceMapTracker(),
- localOnly: !callback,
- options: options,
- source: null,
- sourcesContent: {},
- validator: validator(options.compatibility),
- warnings: []
- };
- var implicitRebaseToWarning;
- if (sourceMap) {
- context.inputSourceMapTracker.track(undefined, sourceMap);
- }
- if (options.rebase && !options.explicitRebaseTo) {
- implicitRebaseToWarning = 'You have set `rebase: true` without giving `rebaseTo` option, which, in this case, defaults to the current working directory. '
- + 'You are then warned this can lead to unexpected URL rebasing (aka here be dragons)! '
- + 'If you are OK with the clean-css output, then you can get rid of this warning by giving clean-css a `rebaseTo: process.cwd()` option.';
- context.warnings.push(implicitRebaseToWarning);
- }
- return runner(context.localOnly)(function() {
- return readSources(input, context, function(tokens) {
- var serialize = context.options.sourceMap
- ? serializeStylesAndSourceMap
- : serializeStyles;
- var optimizedTokens = optimize(tokens, context);
- var optimizedStyles = serialize(optimizedTokens, context);
- var output = withMetadata(optimizedStyles, context);
- return callback
- ? callback(context.errors.length > 0 ? context.errors : null, output)
- : output;
- });
- });
- }
- function runner(localOnly) {
- // to always execute code asynchronously when a callback is given
- // more at blog.izs.me/post/59142742143/designing-apis-for-asynchrony
- return localOnly
- ? function(callback) { return callback(); }
- : process.nextTick;
- }
- function optimize(tokens, context) {
- var optimized = level0Optimize(tokens, context);
- optimized = OptimizationLevel.One in context.options.level
- ? level1Optimize(tokens, context)
- : tokens;
- optimized = OptimizationLevel.Two in context.options.level
- ? level2Optimize(tokens, context, true)
- : optimized;
- return optimized;
- }
- function withMetadata(output, context) {
- output.stats = calculateStatsFrom(output.styles, context);
- output.errors = context.errors;
- output.inlinedStylesheets = context.inlinedStylesheets;
- output.warnings = context.warnings;
- return output;
- }
- function calculateStatsFrom(styles, context) {
- var finishedAt = Date.now();
- var timeSpent = finishedAt - context.stats.startedAt;
- delete context.stats.startedAt;
- context.stats.timeSpent = timeSpent;
- context.stats.efficiency = 1 - styles.length / context.stats.originalSize;
- context.stats.minifiedSize = styles.length;
- return context.stats;
- }
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