update

node_modules/clean-css/lib/clean.js

@@ -0,0 +1,172 @@
+/**
+ * Clean-css - https://github.com/jakubpawlowicz/clean-css
+ * Released under the terms of MIT license
+ *
+ * Copyright (C) 2017 JakubPawlowicz.com
+ */
+
+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 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 = {
+    compatibility: compatibilityFrom(options.compatibility),
+    fetch: fetchFrom(options.fetch),
+    format: formatFrom(options.format),
+    inline: inlineFrom(options.inline),
+    inlineRequest: inlineRequestFrom(options.inlineRequest),
+    inlineTimeout: inlineTimeoutFrom(options.inlineTimeout),
+    level: optimizationLevelFrom(options.level),
+    rebase: rebaseFrom(options.rebase),
+    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) {
+      minify(input, options, maybeSourceMap, function (errors, output) {
+        return errors ?
+          reject(errors) :
+          resolve(output);
+      });
+    });
+  } else {
+    return minify(input, options, maybeSourceMap, maybeCallback);
+  }
+};
+
+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: []
+  };
+
+  if (sourceMap) {
+    context.inputSourceMapTracker.track(undefined, sourceMap);
+  }
+
+  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;
+
+  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;
+}