clear

node_modules/clean-css/lib/selectors/advanced.js

@@ -0,0 +1,86 @@
+var optimizeProperties = require('../properties/optimizer');
+
+var removeDuplicates = require('./remove-duplicates');
+var mergeAdjacent = require('./merge-adjacent');
+var reduceNonAdjacent = require('./reduce-non-adjacent');
+var mergeNonAdjacentBySelector = require('./merge-non-adjacent-by-selector');
+var mergeNonAdjacentByBody = require('./merge-non-adjacent-by-body');
+var restructure = require('./restructure');
+var removeDuplicateMediaQueries = require('./remove-duplicate-media-queries');
+var mergeMediaQueries = require('./merge-media-queries');
+
+function removeEmpty(tokens) {
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    var token = tokens[i];
+    var isEmpty = false;
+
+    switch (token[0]) {
+      case 'selector':
+        isEmpty = token[1].length === 0 || token[2].length === 0;
+        break;
+      case 'block':
+        removeEmpty(token[2]);
+        isEmpty = token[2].length === 0;
+    }
+
+    if (isEmpty) {
+      tokens.splice(i, 1);
+      i--;
+      l--;
+    }
+  }
+}
+
+function recursivelyOptimizeBlocks(tokens, options, context) {
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    var token = tokens[i];
+
+    if (token[0] == 'block') {
+      var isKeyframes = /@(-moz-|-o-|-webkit-)?keyframes/.test(token[1][0]);
+      optimize(token[2], options, context, !isKeyframes);
+    }
+  }
+}
+
+function recursivelyOptimizeProperties(tokens, options, context) {
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    var token = tokens[i];
+
+    switch (token[0]) {
+      case 'selector':
+        optimizeProperties(token[1], token[2], false, true, options, context);
+        break;
+      case 'block':
+        recursivelyOptimizeProperties(token[2], options, context);
+    }
+  }
+}
+
+function optimize(tokens, options, context, withRestructuring) {
+  recursivelyOptimizeBlocks(tokens, options, context);
+  recursivelyOptimizeProperties(tokens, options, context);
+
+  removeDuplicates(tokens);
+  mergeAdjacent(tokens, options, context);
+  reduceNonAdjacent(tokens, options, context);
+
+  mergeNonAdjacentBySelector(tokens, options, context);
+  mergeNonAdjacentByBody(tokens, options);
+
+  if (options.restructuring && withRestructuring) {
+    restructure(tokens, options);
+    mergeAdjacent(tokens, options, context);
+  }
+
+  if (options.mediaMerging) {
+    removeDuplicateMediaQueries(tokens);
+    var reduced = mergeMediaQueries(tokens);
+    for (var i = reduced.length - 1; i >= 0; i--) {
+      optimize(reduced[i][2], options, context, false);
+    }
+  }
+
+  removeEmpty(tokens);
+}
+
+module.exports = optimize;

node_modules/clean-css/lib/selectors/clean-up.js

@@ -0,0 +1,89 @@
+function removeWhitespace(match, value) {
+  return '[' + value.replace(/ /g, '') + ']';
+}
+
+function selectorSorter(s1, s2) {
+  return s1[0] > s2[0] ? 1 : -1;
+}
+
+function whitespaceReplacements(_, p1, p2, p3) {
+  if (p1 && p2 && p3.length)
+    return p1 + p2 + ' ';
+  else if (p1 && p2)
+    return p1 + p2;
+  else
+    return p2;
+}
+
+var CleanUp = {
+  selectors: function (selectors, removeUnsupported, adjacentSpace) {
+    var list = [];
+    var repeated = [];
+
+    for (var i = 0, l = selectors.length; i < l; i++) {
+      var selector = selectors[i];
+      var reduced = selector[0]
+        .replace(/\s+/g, ' ')
+        .replace(/ ?, ?/g, ',')
+        .replace(/\s*(\\)?([>+~])(\s*)/g, whitespaceReplacements)
+        .trim();
+
+      if (adjacentSpace && reduced.indexOf('nav') > 0)
+        reduced = reduced.replace(/\+nav(\S|$)/, '+ nav$1');
+
+      if (removeUnsupported && (reduced.indexOf('*+html ') != -1 || reduced.indexOf('*:first-child+html ') != -1))
+        continue;
+
+      if (reduced.indexOf('*') > -1) {
+        reduced = reduced
+          .replace(/\*([:#\.\[])/g, '$1')
+          .replace(/^(\:first\-child)?\+html/, '*$1+html');
+      }
+
+      if (reduced.indexOf('[') > -1)
+        reduced = reduced.replace(/\[([^\]]+)\]/g, removeWhitespace);
+
+      if (repeated.indexOf(reduced) == -1) {
+        selector[0] = reduced;
+        repeated.push(reduced);
+        list.push(selector);
+      }
+    }
+
+    return list.sort(selectorSorter);
+  },
+
+  selectorDuplicates: function (selectors) {
+    var list = [];
+    var repeated = [];
+
+    for (var i = 0, l = selectors.length; i < l; i++) {
+      var selector = selectors[i];
+
+      if (repeated.indexOf(selector[0]) == -1) {
+        repeated.push(selector[0]);
+        list.push(selector);
+      }
+    }
+
+    return list.sort(selectorSorter);
+  },
+
+  block: function (values, spaceAfterClosingBrace) {
+    values[0] = values[0]
+      .replace(/\s+/g, ' ')
+      .replace(/(,|:|\() /g, '$1')
+      .replace(/ \)/g, ')');
+
+    if (!spaceAfterClosingBrace)
+      values[0] = values[0].replace(/\) /g, ')');
+  },
+
+  atRule: function (values) {
+    values[0] = values[0]
+      .replace(/\s+/g, ' ')
+      .trim();
+  }
+};
+
+module.exports = CleanUp;

node_modules/clean-css/lib/selectors/extractor.js

@@ -0,0 +1,69 @@
+// This extractor is used in advanced optimizations
+// IMPORTANT: Mind Token class and this code is not related!
+// Properties will be tokenized in one step, see #429
+
+var stringifySelectors = require('../stringifier/one-time').selectors;
+var stringifyValue = require('../stringifier/one-time').value;
+
+var AT_RULE = 'at-rule';
+
+function extract(token) {
+  var properties = [];
+
+  if (token[0] == 'selector') {
+    var inSpecificSelector = !/[\.\+>~]/.test(stringifySelectors(token[1]));
+    for (var i = 0, l = token[2].length; i < l; i++) {
+      var property = token[2][i];
+
+      if (property.indexOf('__ESCAPED') === 0)
+        continue;
+
+      if (property[0] == AT_RULE)
+        continue;
+
+      var name = token[2][i][0][0];
+      if (name.length === 0)
+        continue;
+
+      if (name.indexOf('--') === 0)
+        continue;
+
+      var value = stringifyValue(token[2], i);
+
+      properties.push([
+        name,
+        value,
+        findNameRoot(name),
+        token[2][i],
+        name + ':' + value,
+        token[1],
+        inSpecificSelector
+      ]);
+    }
+  } else if (token[0] == 'block') {
+    for (var j = 0, k = token[2].length; j < k; j++) {
+      properties = properties.concat(extract(token[2][j]));
+    }
+  }
+
+  return properties;
+}
+
+function findNameRoot(name) {
+  if (name == 'list-style')
+    return name;
+  if (name.indexOf('-radius') > 0)
+    return 'border-radius';
+  if (name == 'border-collapse' || name == 'border-spacing' || name == 'border-image')
+    return name;
+  if (name.indexOf('border-') === 0 && /^border\-\w+\-\w+$/.test(name))
+    return name.match(/border\-\w+/)[0];
+  if (name.indexOf('border-') === 0 && /^border\-\w+$/.test(name))
+    return 'border';
+  if (name.indexOf('text-') === 0)
+    return name;
+
+  return name.replace(/^\-\w+\-/, '').match(/([a-zA-Z]+)/)[0].toLowerCase();
+}
+
+module.exports = extract;

node_modules/clean-css/lib/selectors/is-special.js

@@ -0,0 +1,5 @@
+function isSpecial(options, selector) {
+  return options.compatibility.selectors.special.test(selector);
+}
+
+module.exports = isSpecial;

node_modules/clean-css/lib/selectors/merge-adjacent.js

@@ -0,0 +1,35 @@
+var optimizeProperties = require('../properties/optimizer');
+
+var stringifyBody = require('../stringifier/one-time').body;
+var stringifySelectors = require('../stringifier/one-time').selectors;
+var cleanUpSelectors = require('./clean-up').selectors;
+var isSpecial = require('./is-special');
+
+function mergeAdjacent(tokens, options, context) {
+  var lastToken = [null, [], []];
+  var adjacentSpace = options.compatibility.selectors.adjacentSpace;
+
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    var token = tokens[i];
+
+    if (token[0] != 'selector') {
+      lastToken = [null, [], []];
+      continue;
+    }
+
+    if (lastToken[0] == 'selector' && stringifySelectors(token[1]) == stringifySelectors(lastToken[1])) {
+      var joinAt = [lastToken[2].length];
+      Array.prototype.push.apply(lastToken[2], token[2]);
+      optimizeProperties(token[1], lastToken[2], joinAt, true, options, context);
+      token[2] = [];
+    } else if (lastToken[0] == 'selector' && stringifyBody(token[2]) == stringifyBody(lastToken[2]) &&
+        !isSpecial(options, stringifySelectors(token[1])) && !isSpecial(options, stringifySelectors(lastToken[1]))) {
+      lastToken[1] = cleanUpSelectors(lastToken[1].concat(token[1]), false, adjacentSpace);
+      token[2] = [];
+    } else {
+      lastToken = token;
+    }
+  }
+}
+
+module.exports = mergeAdjacent;

node_modules/clean-css/lib/selectors/merge-media-queries.js

@@ -0,0 +1,64 @@
+var canReorder = require('./reorderable').canReorder;
+var extractProperties = require('./extractor');
+
+function mergeMediaQueries(tokens) {
+  var candidates = {};
+  var reduced = [];
+
+  for (var i = tokens.length - 1; i >= 0; i--) {
+    var token = tokens[i];
+    if (token[0] != 'block')
+      continue;
+
+    var candidate = candidates[token[1][0]];
+    if (!candidate) {
+      candidate = [];
+      candidates[token[1][0]] = candidate;
+    }
+
+    candidate.push(i);
+  }
+
+  for (var name in candidates) {
+    var positions = candidates[name];
+
+    positionLoop:
+    for (var j = positions.length - 1; j > 0; j--) {
+      var positionOne = positions[j];
+      var tokenOne = tokens[positionOne];
+      var positionTwo = positions[j - 1];
+      var tokenTwo = tokens[positionTwo];
+
+      directionLoop:
+      for (var direction = 1; direction >= -1; direction -= 2) {
+        var topToBottom = direction == 1;
+        var from = topToBottom ? positionOne + 1 : positionTwo - 1;
+        var to = topToBottom ? positionTwo : positionOne;
+        var delta = topToBottom ? 1 : -1;
+        var source = topToBottom ? tokenOne : tokenTwo;
+        var target = topToBottom ? tokenTwo : tokenOne;
+        var movedProperties = extractProperties(source);
+
+        while (from != to) {
+          var traversedProperties = extractProperties(tokens[from]);
+          from += delta;
+
+          if (!canReorder(movedProperties, traversedProperties))
+            continue directionLoop;
+        }
+
+        target[2] = topToBottom ?
+          source[2].concat(target[2]) :
+          target[2].concat(source[2]);
+        source[2] = [];
+
+        reduced.push(target);
+        continue positionLoop;
+      }
+    }
+  }
+
+  return reduced;
+}
+
+module.exports = mergeMediaQueries;

node_modules/clean-css/lib/selectors/merge-non-adjacent-by-body.js

@@ -0,0 +1,61 @@
+var stringifyBody = require('../stringifier/one-time').body;
+var stringifySelectors = require('../stringifier/one-time').selectors;
+var cleanUpSelectors = require('./clean-up').selectors;
+var isSpecial = require('./is-special');
+
+function unsafeSelector(value) {
+  return /\.|\*| :/.test(value);
+}
+
+function isBemElement(token) {
+  var asString = stringifySelectors(token[1]);
+  return asString.indexOf('__') > -1 || asString.indexOf('--') > -1;
+}
+
+function withoutModifier(selector) {
+  return selector.replace(/--[^ ,>\+~:]+/g, '');
+}
+
+function removeAnyUnsafeElements(left, candidates) {
+  var leftSelector = withoutModifier(stringifySelectors(left[1]));
+
+  for (var body in candidates) {
+    var right = candidates[body];
+    var rightSelector = withoutModifier(stringifySelectors(right[1]));
+
+    if (rightSelector.indexOf(leftSelector) > -1 || leftSelector.indexOf(rightSelector) > -1)
+      delete candidates[body];
+  }
+}
+
+function mergeNonAdjacentByBody(tokens, options) {
+  var candidates = {};
+  var adjacentSpace = options.compatibility.selectors.adjacentSpace;
+
+  for (var i = tokens.length - 1; i >= 0; i--) {
+    var token = tokens[i];
+    if (token[0] != 'selector')
+      continue;
+
+    if (token[2].length > 0 && (!options.semanticMerging && unsafeSelector(stringifySelectors(token[1]))))
+      candidates = {};
+
+    if (token[2].length > 0 && options.semanticMerging && isBemElement(token))
+      removeAnyUnsafeElements(token, candidates);
+
+    var candidateBody = stringifyBody(token[2]);
+    var oldToken = candidates[candidateBody];
+    if (oldToken && !isSpecial(options, stringifySelectors(token[1])) && !isSpecial(options, stringifySelectors(oldToken[1]))) {
+      token[1] = token[2].length > 0 ?
+        cleanUpSelectors(oldToken[1].concat(token[1]), false, adjacentSpace) :
+        oldToken[1].concat(token[1]);
+
+      oldToken[2] = [];
+      candidates[candidateBody] = null;
+    }
+
+    candidates[stringifyBody(token[2])] = token;
+  }
+}
+
+module.exports = mergeNonAdjacentByBody;

node_modules/clean-css/lib/selectors/merge-non-adjacent-by-selector.js

@@ -0,0 +1,76 @@
+var optimizeProperties = require('../properties/optimizer');
+var stringifySelectors = require('../stringifier/one-time').selectors;
+var extractProperties = require('./extractor');
+var canReorder = require('./reorderable').canReorder;
+
+function mergeNonAdjacentBySelector(tokens, options, context) {
+  var allSelectors = {};
+  var repeatedSelectors = [];
+  var i;
+
+  for (i = tokens.length - 1; i >= 0; i--) {
+    if (tokens[i][0] != 'selector')
+      continue;
+    if (tokens[i][2].length === 0)
+      continue;
+
+    var selector = stringifySelectors(tokens[i][1]);
+    allSelectors[selector] = [i].concat(allSelectors[selector] || []);
+
+    if (allSelectors[selector].length == 2)
+      repeatedSelectors.push(selector);
+  }
+
+  for (i = repeatedSelectors.length - 1; i >= 0; i--) {
+    var positions = allSelectors[repeatedSelectors[i]];
+
+    selectorIterator:
+    for (var j = positions.length - 1; j > 0; j--) {
+      var positionOne = positions[j - 1];
+      var tokenOne = tokens[positionOne];
+      var positionTwo = positions[j];
+      var tokenTwo = tokens[positionTwo];
+
+      directionIterator:
+      for (var direction = 1; direction >= -1; direction -= 2) {
+        var topToBottom = direction == 1;
+        var from = topToBottom ? positionOne + 1 : positionTwo - 1;
+        var to = topToBottom ? positionTwo : positionOne;
+        var delta = topToBottom ? 1 : -1;
+        var moved = topToBottom ? tokenOne : tokenTwo;
+        var target = topToBottom ? tokenTwo : tokenOne;
+        var movedProperties = extractProperties(moved);
+        var joinAt;
+
+        while (from != to) {
+          var traversedProperties = extractProperties(tokens[from]);
+          from += delta;
+
+          // traversed then moved as we move selectors towards the start
+          var reorderable = topToBottom ?
+            canReorder(movedProperties, traversedProperties) :
+            canReorder(traversedProperties, movedProperties);
+
+          if (!reorderable && !topToBottom)
+            continue selectorIterator;
+          if (!reorderable && topToBottom)
+            continue directionIterator;
+        }
+
+        if (topToBottom) {
+          joinAt = [moved[2].length];
+          Array.prototype.push.apply(moved[2], target[2]);
+          target[2] = moved[2];
+        } else {
+          joinAt = [target[2].length];
+          Array.prototype.push.apply(target[2], moved[2]);
+        }
+
+        optimizeProperties(target[1], target[2], joinAt, true, options, context);
+        moved[2] = [];
+      }
+    }
+  }
+}
+
+module.exports = mergeNonAdjacentBySelector;

node_modules/clean-css/lib/selectors/reduce-non-adjacent.js

@@ -0,0 +1,172 @@
+var optimizeProperties = require('../properties/optimizer');
+var stringifyBody = require('../stringifier/one-time').body;
+var stringifySelectors = require('../stringifier/one-time').selectors;
+var isSpecial = require('./is-special');
+var cloneArray = require('../utils/clone-array');
+
+function reduceNonAdjacent(tokens, options, context) {
+  var candidates = {};
+  var repeated = [];
+
+  for (var i = tokens.length - 1; i >= 0; i--) {
+    var token = tokens[i];
+
+    if (token[0] != 'selector')
+      continue;
+    if (token[2].length === 0)
+      continue;
+
+    var selectorAsString = stringifySelectors(token[1]);
+    var isComplexAndNotSpecial = token[1].length > 1 && !isSpecial(options, selectorAsString);
+    var wrappedSelectors = options.sourceMap ? wrappedSelectorsFrom(token[1]) : token[1];
+    var selectors = isComplexAndNotSpecial ?
+      [selectorAsString].concat(wrappedSelectors) :
+      [selectorAsString];
+
+    for (var j = 0, m = selectors.length; j < m; j++) {
+      var selector = selectors[j];
+
+      if (!candidates[selector])
+        candidates[selector] = [];
+      else
+        repeated.push(selector);
+
+      candidates[selector].push({
+        where: i,
+        list: wrappedSelectors,
+        isPartial: isComplexAndNotSpecial && j > 0,
+        isComplex: isComplexAndNotSpecial && j === 0
+      });
+    }
+  }
+
+  reduceSimpleNonAdjacentCases(tokens, repeated, candidates, options, context);
+  reduceComplexNonAdjacentCases(tokens, candidates, options, context);
+}
+
+function wrappedSelectorsFrom(list) {
+  var wrapped = [];
+
+  for (var i = 0; i < list.length; i++) {
+    wrapped.push([list[i][0]]);
+  }
+
+  return wrapped;
+}
+
+function reduceSimpleNonAdjacentCases(tokens, repeated, candidates, options, context) {
+  function filterOut(idx, bodies) {
+    return data[idx].isPartial && bodies.length === 0;
+  }
+
+  function reduceBody(token, newBody, processedCount, tokenIdx) {
+    if (!data[processedCount - tokenIdx - 1].isPartial)
+      token[2] = newBody;
+  }
+
+  for (var i = 0, l = repeated.length; i < l; i++) {
+    var selector = repeated[i];
+    var data = candidates[selector];
+
+    reduceSelector(tokens, selector, data, {
+      filterOut: filterOut,
+      callback: reduceBody
+    }, options, context);
+  }
+}
+
+function reduceComplexNonAdjacentCases(tokens, candidates, options, context) {
+  var localContext = {};
+
+  function filterOut(idx) {
+    return localContext.data[idx].where < localContext.intoPosition;
+  }
+
+  function collectReducedBodies(token, newBody, processedCount, tokenIdx) {
+    if (tokenIdx === 0)
+      localContext.reducedBodies.push(newBody);
+  }
+
+  allSelectors:
+  for (var complexSelector in candidates) {
+    var into = candidates[complexSelector];
+    if (!into[0].isComplex)
+      continue;
+
+    var intoPosition = into[into.length - 1].where;
+    var intoToken = tokens[intoPosition];
+    var reducedBodies = [];
+
+    var selectors = isSpecial(options, complexSelector) ?
+      [complexSelector] :
+      into[0].list;
+
+    localContext.intoPosition = intoPosition;
+    localContext.reducedBodies = reducedBodies;
+
+    for (var j = 0, m = selectors.length; j < m; j++) {
+      var selector = selectors[j];
+      var data = candidates[selector];
+
+      if (data.length < 2)
+        continue allSelectors;
+
+      localContext.data = data;
+
+      reduceSelector(tokens, selector, data, {
+        filterOut: filterOut,
+        callback: collectReducedBodies
+      }, options, context);
+
+      if (stringifyBody(reducedBodies[reducedBodies.length - 1]) != stringifyBody(reducedBodies[0]))
+        continue allSelectors;
+    }
+
+    intoToken[2] = reducedBodies[0];
+  }
+}
+
+function reduceSelector(tokens, selector, data, context, options, outerContext) {
+  var bodies = [];
+  var bodiesAsList = [];
+  var joinsAt = [];
+  var processedTokens = [];
+
+  for (var j = data.length - 1, m = 0; j >= 0; j--) {
+    if (context.filterOut(j, bodies))
+      continue;
+
+    var where = data[j].where;
+    var token = tokens[where];
+    var clonedBody = cloneArray(token[2]);
+
+    bodies = bodies.concat(clonedBody);
+    bodiesAsList.push(clonedBody);
+    processedTokens.push(where);
+  }
+
+  for (j = 0, m = bodiesAsList.length; j < m; j++) {
+    if (bodiesAsList[j].length > 0)
+      joinsAt.push((joinsAt.length > 0 ? joinsAt[joinsAt.length - 1] : 0) + bodiesAsList[j].length);
+  }
+
+  optimizeProperties(selector, bodies, joinsAt, false, options, outerContext);
+
+  var processedCount = processedTokens.length;
+  var propertyIdx = bodies.length - 1;
+  var tokenIdx = processedCount - 1;
+
+  while (tokenIdx >= 0) {
+     if ((tokenIdx === 0 || (bodies[propertyIdx] && bodiesAsList[tokenIdx].indexOf(bodies[propertyIdx]) > -1)) && propertyIdx > -1) {
+      propertyIdx--;
+      continue;
+    }
+
+    var newBody = bodies.splice(propertyIdx + 1);
+    context.callback(tokens[processedTokens[tokenIdx]], newBody, processedCount, tokenIdx);
+
+    tokenIdx--;
+  }
+}
+
+module.exports = reduceNonAdjacent;

node_modules/clean-css/lib/selectors/remove-duplicate-media-queries.js

@@ -0,0 +1,21 @@
+var stringifyAll = require('../stringifier/one-time').all;
+
+function removeDuplicateMediaQueries(tokens) {
+  var candidates = {};
+
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    var token = tokens[i];
+    if (token[0] != 'block')
+      continue;
+
+    var key = token[1][0] + '%' + stringifyAll(token[2]);
+    var candidate = candidates[key];
+
+    if (candidate)
+      candidate[2] = [];
+
+    candidates[key] = token;
+  }
+}
+
+module.exports = removeDuplicateMediaQueries;

node_modules/clean-css/lib/selectors/remove-duplicates.js

@@ -0,0 +1,41 @@
+var stringifyBody = require('../stringifier/one-time').body;
+var stringifySelectors = require('../stringifier/one-time').selectors;
+
+function removeDuplicates(tokens) {
+  var matched = {};
+  var moreThanOnce = [];
+  var id, token;
+  var body, bodies;
+
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    token = tokens[i];
+    if (token[0] != 'selector')
+      continue;
+
+    id = stringifySelectors(token[1]);
+
+    if (matched[id] && matched[id].length == 1)
+      moreThanOnce.push(id);
+    else
+      matched[id] = matched[id] || [];
+
+    matched[id].push(i);
+  }
+
+  for (i = 0, l = moreThanOnce.length; i < l; i++) {
+    id = moreThanOnce[i];
+    bodies = [];
+
+    for (var j = matched[id].length - 1; j >= 0; j--) {
+      token = tokens[matched[id][j]];
+      body = stringifyBody(token[2]);
+
+      if (bodies.indexOf(body) > -1)
+        token[2] = [];
+      else
+        bodies.push(body);
+    }
+  }
+}
+
+module.exports = removeDuplicates;

node_modules/clean-css/lib/selectors/reorderable.js

@@ -0,0 +1,99 @@
+// TODO: it'd be great to merge it with the other canReorder functionality
+
+var FLEX_PROPERTIES = /align\-items|box\-align|box\-pack|flex|justify/;
+var BORDER_PROPERTIES = /^border\-(top|right|bottom|left|color|style|width|radius)/;
+
+function canReorder(left, right) {
+  for (var i = right.length - 1; i >= 0; i--) {
+    for (var j = left.length - 1; j >= 0; j--) {
+      if (!canReorderSingle(left[j], right[i]))
+        return false;
+    }
+  }
+
+  return true;
+}
+
+function canReorderSingle(left, right) {
+  var leftName = left[0];
+  var leftValue = left[1];
+  var leftNameRoot = left[2];
+  var leftSelector = left[5];
+  var leftInSpecificSelector = left[6];
+  var rightName = right[0];
+  var rightValue = right[1];
+  var rightNameRoot = right[2];
+  var rightSelector = right[5];
+  var rightInSpecificSelector = right[6];
+
+  if (leftName == 'font' && rightName == 'line-height' || rightName == 'font' && leftName == 'line-height')
+    return false;
+  if (FLEX_PROPERTIES.test(leftName) && FLEX_PROPERTIES.test(rightName))
+    return false;
+  if (leftNameRoot == rightNameRoot && unprefixed(leftName) == unprefixed(rightName) && (vendorPrefixed(leftName) ^ vendorPrefixed(rightName)))
+    return false;
+  if (leftNameRoot == 'border' && BORDER_PROPERTIES.test(rightNameRoot) && (leftName == 'border' || leftName == rightNameRoot || (leftValue != rightValue && sameBorderComponent(leftName, rightName))))
+    return false;
+  if (rightNameRoot == 'border' && BORDER_PROPERTIES.test(leftNameRoot) && (rightName == 'border' || rightName == leftNameRoot || (leftValue != rightValue && sameBorderComponent(leftName, rightName))))
+    return false;
+  if (leftNameRoot == 'border' && rightNameRoot == 'border' && leftName != rightName && (isSideBorder(leftName) && isStyleBorder(rightName) || isStyleBorder(leftName) && isSideBorder(rightName)))
+    return false;
+  if (leftNameRoot != rightNameRoot)
+    return true;
+  if (leftName == rightName && leftNameRoot == rightNameRoot && (leftValue == rightValue || withDifferentVendorPrefix(leftValue, rightValue)))
+    return true;
+  if (leftName != rightName && leftNameRoot == rightNameRoot && leftName != leftNameRoot && rightName != rightNameRoot)
+    return true;
+  if (leftName != rightName && leftNameRoot == rightNameRoot && leftValue == rightValue)
+    return true;
+  if (rightInSpecificSelector && leftInSpecificSelector && !inheritable(leftNameRoot) && !inheritable(rightNameRoot) && selectorsDoNotOverlap(rightSelector, leftSelector))
+    return true;
+
+  return false;
+}
+
+function vendorPrefixed(name) {
+  return /^\-(?:moz|webkit|ms|o)\-/.test(name);
+}
+
+function unprefixed(name) {
+  return name.replace(/^\-(?:moz|webkit|ms|o)\-/, '');
+}
+
+function sameBorderComponent(name1, name2) {
+  return name1.split('-').pop() == name2.split('-').pop();
+}
+
+function isSideBorder(name) {
+  return name == 'border-top' || name == 'border-right' || name == 'border-bottom' || name == 'border-left';
+}
+
+function isStyleBorder(name) {
+  return name == 'border-color' || name == 'border-style' || name == 'border-width';
+}
+
+function withDifferentVendorPrefix(value1, value2) {
+  return vendorPrefixed(value1) && vendorPrefixed(value2) && value1.split('-')[1] != value2.split('-')[2];
+}
+
+function selectorsDoNotOverlap(s1, s2) {
+  for (var i = 0, l = s1.length; i < l; i++) {
+    for (var j = 0, m = s2.length; j < m; j++) {
+      if (s1[i][0] == s2[j][0])
+        return false;
+    }
+  }
+
+  return true;
+}
+
+function inheritable(name) {
+  // According to http://www.w3.org/TR/CSS21/propidx.html
+  // Others will be catched by other, preceeding rules
+  return name == 'font' || name == 'line-height' || name == 'list-style';
+}
+
+module.exports = {
+  canReorder: canReorder,
+  canReorderSingle: canReorderSingle
+};

node_modules/clean-css/lib/selectors/restructure.js

@@ -0,0 +1,369 @@
+var extractProperties = require('./extractor');
+var canReorderSingle = require('./reorderable').canReorderSingle;
+var stringifyBody = require('../stringifier/one-time').body;
+var stringifySelectors = require('../stringifier/one-time').selectors;
+var cleanUpSelectorDuplicates = require('./clean-up').selectorDuplicates;
+var isSpecial = require('./is-special');
+var cloneArray = require('../utils/clone-array');
+
+function naturalSorter(a, b) {
+  return a > b;
+}
+
+function cloneAndMergeSelectors(propertyA, propertyB) {
+  var cloned = cloneArray(propertyA);
+  cloned[5] = cloned[5].concat(propertyB[5]);
+
+  return cloned;
+}
+
+function restructure(tokens, options) {
+  var movableTokens = {};
+  var movedProperties = [];
+  var multiPropertyMoveCache = {};
+  var movedToBeDropped = [];
+  var maxCombinationsLevel = 2;
+  var ID_JOIN_CHARACTER = '%';
+
+  function sendToMultiPropertyMoveCache(position, movedProperty, allFits) {
+    for (var i = allFits.length - 1; i >= 0; i--) {
+      var fit = allFits[i][0];
+      var id = addToCache(movedProperty, fit);
+
+      if (multiPropertyMoveCache[id].length > 1 && processMultiPropertyMove(position, multiPropertyMoveCache[id])) {
+        removeAllMatchingFromCache(id);
+        break;
+      }
+    }
+  }
+
+  function addToCache(movedProperty, fit) {
+    var id = cacheId(fit);
+    multiPropertyMoveCache[id] = multiPropertyMoveCache[id] || [];
+    multiPropertyMoveCache[id].push([movedProperty, fit]);
+    return id;
+  }
+
+  function removeAllMatchingFromCache(matchId) {
+    var matchSelectors = matchId.split(ID_JOIN_CHARACTER);
+    var forRemoval = [];
+    var i;
+
+    for (var id in multiPropertyMoveCache) {
+      var selectors = id.split(ID_JOIN_CHARACTER);
+      for (i = selectors.length - 1; i >= 0; i--) {
+        if (matchSelectors.indexOf(selectors[i]) > -1) {
+          forRemoval.push(id);
+          break;
+        }
+      }
+    }
+
+    for (i = forRemoval.length - 1; i >= 0; i--) {
+      delete multiPropertyMoveCache[forRemoval[i]];
+    }
+  }
+
+  function cacheId(cachedTokens) {
+    var id = [];
+    for (var i = 0, l = cachedTokens.length; i < l; i++) {
+      id.push(stringifySelectors(cachedTokens[i][1]));
+    }
+    return id.join(ID_JOIN_CHARACTER);
+  }
+
+  function tokensToMerge(sourceTokens) {
+    var uniqueTokensWithBody = [];
+    var mergeableTokens = [];
+
+    for (var i = sourceTokens.length - 1; i >= 0; i--) {
+      if (isSpecial(options, stringifySelectors(sourceTokens[i][1])))
+        continue;
+
+      mergeableTokens.unshift(sourceTokens[i]);
+      if (sourceTokens[i][2].length > 0 && uniqueTokensWithBody.indexOf(sourceTokens[i]) == -1)
+        uniqueTokensWithBody.push(sourceTokens[i]);
+    }
+
+    return uniqueTokensWithBody.length > 1 ?
+      mergeableTokens :
+      [];
+  }
+
+  function shortenIfPossible(position, movedProperty) {
+    var name = movedProperty[0];
+    var value = movedProperty[1];
+    var key = movedProperty[4];
+    var valueSize = name.length + value.length + 1;
+    var allSelectors = [];
+    var qualifiedTokens = [];
+
+    var mergeableTokens = tokensToMerge(movableTokens[key]);
+    if (mergeableTokens.length < 2)
+      return;
+
+    var allFits = findAllFits(mergeableTokens, valueSize, 1);
+    var bestFit = allFits[0];
+    if (bestFit[1] > 0)
+      return sendToMultiPropertyMoveCache(position, movedProperty, allFits);
+
+    for (var i = bestFit[0].length - 1; i >=0; i--) {
+      allSelectors = bestFit[0][i][1].concat(allSelectors);
+      qualifiedTokens.unshift(bestFit[0][i]);
+    }
+
+    allSelectors = cleanUpSelectorDuplicates(allSelectors);
+    dropAsNewTokenAt(position, [movedProperty], allSelectors, qualifiedTokens);
+  }
+
+  function fitSorter(fit1, fit2) {
+    return fit1[1] > fit2[1];
+  }
+
+  function findAllFits(mergeableTokens, propertySize, propertiesCount) {
+    var combinations = allCombinations(mergeableTokens, propertySize, propertiesCount, maxCombinationsLevel - 1);
+    return combinations.sort(fitSorter);
+  }
+
+  function allCombinations(tokensVariant, propertySize, propertiesCount, level) {
+    var differenceVariants = [[tokensVariant, sizeDifference(tokensVariant, propertySize, propertiesCount)]];
+    if (tokensVariant.length > 2 && level > 0) {
+      for (var i = tokensVariant.length - 1; i >= 0; i--) {
+        var subVariant = Array.prototype.slice.call(tokensVariant, 0);
+        subVariant.splice(i, 1);
+        differenceVariants = differenceVariants.concat(allCombinations(subVariant, propertySize, propertiesCount, level - 1));
+      }
+    }
+
+    return differenceVariants;
+  }
+
+  function sizeDifference(tokensVariant, propertySize, propertiesCount) {
+    var allSelectorsSize = 0;
+    for (var i = tokensVariant.length - 1; i >= 0; i--) {
+      allSelectorsSize += tokensVariant[i][2].length > propertiesCount ? stringifySelectors(tokensVariant[i][1]).length : -1;
+    }
+    return allSelectorsSize - (tokensVariant.length - 1) * propertySize + 1;
+  }
+
+  function dropAsNewTokenAt(position, properties, allSelectors, mergeableTokens) {
+    var i, j, k, m;
+    var allProperties = [];
+
+    for (i = mergeableTokens.length - 1; i >= 0; i--) {
+      var mergeableToken = mergeableTokens[i];
+
+      for (j = mergeableToken[2].length - 1; j >= 0; j--) {
+        var mergeableProperty = mergeableToken[2][j];
+
+        for (k = 0, m = properties.length; k < m; k++) {
+          var property = properties[k];
+
+          var mergeablePropertyName = mergeableProperty[0][0];
+          var propertyName = property[0];
+          var propertyBody = property[4];
+          if (mergeablePropertyName == propertyName && stringifyBody([mergeableProperty]) == propertyBody) {
+            mergeableToken[2].splice(j, 1);
+            break;
+          }
+        }
+      }
+    }
+
+    for (i = properties.length - 1; i >= 0; i--) {
+      allProperties.unshift(properties[i][3]);
+    }
+
+    var newToken = ['selector', allSelectors, allProperties];
+    tokens.splice(position, 0, newToken);
+  }
+
+  function dropPropertiesAt(position, movedProperty) {
+    var key = movedProperty[4];
+    var toMove = movableTokens[key];
+
+    if (toMove && toMove.length > 1) {
+      if (!shortenMultiMovesIfPossible(position, movedProperty))
+        shortenIfPossible(position, movedProperty);
+    }
+  }
+
+  function shortenMultiMovesIfPossible(position, movedProperty) {
+    var candidates = [];
+    var propertiesAndMergableTokens = [];
+    var key = movedProperty[4];
+    var j, k;
+
+    var mergeableTokens = tokensToMerge(movableTokens[key]);
+    if (mergeableTokens.length < 2)
+      return;
+
+    movableLoop:
+    for (var value in movableTokens) {
+      var tokensList = movableTokens[value];
+
+      for (j = mergeableTokens.length - 1; j >= 0; j--) {
+        if (tokensList.indexOf(mergeableTokens[j]) == -1)
+          continue movableLoop;
+      }
+
+      candidates.push(value);
+    }
+
+    if (candidates.length < 2)
+      return false;
+
+    for (j = candidates.length - 1; j >= 0; j--) {
+      for (k = movedProperties.length - 1; k >= 0; k--) {
+        if (movedProperties[k][4] == candidates[j]) {
+          propertiesAndMergableTokens.unshift([movedProperties[k], mergeableTokens]);
+          break;
+        }
+      }
+    }
+
+    return processMultiPropertyMove(position, propertiesAndMergableTokens);
+  }
+
+  function processMultiPropertyMove(position, propertiesAndMergableTokens) {
+    var valueSize = 0;
+    var properties = [];
+    var property;
+
+    for (var i = propertiesAndMergableTokens.length - 1; i >= 0; i--) {
+      property = propertiesAndMergableTokens[i][0];
+      var fullValue = property[4];
+      valueSize += fullValue.length + (i > 0 ? 1 : 0);
+
+      properties.push(property);
+    }
+
+    var mergeableTokens = propertiesAndMergableTokens[0][1];
+    var bestFit = findAllFits(mergeableTokens, valueSize, properties.length)[0];
+    if (bestFit[1] > 0)
+      return false;
+
+    var allSelectors = [];
+    var qualifiedTokens = [];
+    for (i = bestFit[0].length - 1; i >= 0; i--) {
+      allSelectors = bestFit[0][i][1].concat(allSelectors);
+      qualifiedTokens.unshift(bestFit[0][i]);
+    }
+
+    allSelectors = cleanUpSelectorDuplicates(allSelectors);
+    dropAsNewTokenAt(position, properties, allSelectors, qualifiedTokens);
+
+    for (i = properties.length - 1; i >= 0; i--) {
+      property = properties[i];
+      var index = movedProperties.indexOf(property);
+
+      delete movableTokens[property[4]];
+
+      if (index > -1 && movedToBeDropped.indexOf(index) == -1)
+        movedToBeDropped.push(index);
+    }
+
+    return true;
+  }
+
+  function boundToAnotherPropertyInCurrrentToken(property, movedProperty, token) {
+    var propertyName = property[0];
+    var movedPropertyName = movedProperty[0];
+    if (propertyName != movedPropertyName)
+      return false;
+
+    var key = movedProperty[4];
+    var toMove = movableTokens[key];
+    return toMove && toMove.indexOf(token) > -1;
+  }
+
+  for (var i = tokens.length - 1; i >= 0; i--) {
+    var token = tokens[i];
+    var isSelector;
+    var j, k, m;
+    var samePropertyAt;
+
+    if (token[0] == 'selector') {
+      isSelector = true;
+    } else if (token[0] == 'block') {
+      isSelector = false;
+    } else {
+      continue;
+    }
+
+    // We cache movedProperties.length as it may change in the loop
+    var movedCount = movedProperties.length;
+
+    var properties = extractProperties(token);
+    movedToBeDropped = [];
+
+    var unmovableInCurrentToken = [];
+    for (j = properties.length - 1; j >= 0; j--) {
+      for (k = j - 1; k >= 0; k--) {
+        if (!canReorderSingle(properties[j], properties[k])) {
+          unmovableInCurrentToken.push(j);
+          break;
+        }
+      }
+    }
+
+    for (j = properties.length - 1; j >= 0; j--) {
+      var property = properties[j];
+      var movedSameProperty = false;
+
+      for (k = 0; k < movedCount; k++) {
+        var movedProperty = movedProperties[k];
+
+        if (movedToBeDropped.indexOf(k) == -1 && !canReorderSingle(property, movedProperty) && !boundToAnotherPropertyInCurrrentToken(property, movedProperty, token)) {
+          dropPropertiesAt(i + 1, movedProperty, token);
+
+          if (movedToBeDropped.indexOf(k) == -1) {
+            movedToBeDropped.push(k);
+            delete movableTokens[movedProperty[4]];
+          }
+        }
+
+        if (!movedSameProperty) {
+          movedSameProperty = property[0] == movedProperty[0] && property[1] == movedProperty[1];
+
+          if (movedSameProperty) {
+            samePropertyAt = k;
+          }
+        }
+      }
+
+      if (!isSelector || unmovableInCurrentToken.indexOf(j) > -1)
+        continue;
+
+      var key = property[4];
+      movableTokens[key] = movableTokens[key] || [];
+      movableTokens[key].push(token);
+
+      if (movedSameProperty) {
+        movedProperties[samePropertyAt] = cloneAndMergeSelectors(movedProperties[samePropertyAt], property);
+      } else {
+        movedProperties.push(property);
+      }
+    }
+
+    movedToBeDropped = movedToBeDropped.sort(naturalSorter);
+    for (j = 0, m = movedToBeDropped.length; j < m; j++) {
+      var dropAt = movedToBeDropped[j] - j;
+      movedProperties.splice(dropAt, 1);
+    }
+  }
+
+  var position = tokens[0] && tokens[0][0] == 'at-rule' && tokens[0][1][0].indexOf('@charset') === 0 ? 1 : 0;
+  for (; position < tokens.length - 1; position++) {
+    var isImportRule = tokens[position][0] === 'at-rule' && tokens[position][1][0].indexOf('@import') === 0;
+    var isEscapedCommentSpecial = tokens[position][0] === 'text' && tokens[position][1][0].indexOf('__ESCAPED_COMMENT_SPECIAL') === 0;
+    if (!(isImportRule || isEscapedCommentSpecial))
+      break;
+  }
+
+  for (i = 0; i < movedProperties.length; i++) {
+    dropPropertiesAt(position, movedProperties[i]);
+  }
+}
+
+module.exports = restructure;

node_modules/clean-css/lib/selectors/simple.js

@@ -0,0 +1,454 @@
+var cleanUpSelectors = require('./clean-up').selectors;
+var cleanUpBlock = require('./clean-up').block;
+var cleanUpAtRule = require('./clean-up').atRule;
+var split = require('../utils/split');
+
+var RGB = require('../colors/rgb');
+var HSL = require('../colors/hsl');
+var HexNameShortener = require('../colors/hex-name-shortener');
+
+var wrapForOptimizing = require('../properties/wrap-for-optimizing').all;
+var restoreFromOptimizing = require('../properties/restore-from-optimizing');
+var removeUnused = require('../properties/remove-unused');
+
+var DEFAULT_ROUNDING_PRECISION = 2;
+var CHARSET_TOKEN = '@charset';
+var CHARSET_REGEXP = new RegExp('^' + CHARSET_TOKEN, 'i');
+var IMPORT_REGEXP = /^@import["'\s]/i;
+
+var FONT_NUMERAL_WEIGHTS = ['100', '200', '300', '400', '500', '600', '700', '800', '900'];
+var FONT_NAME_WEIGHTS = ['normal', 'bold', 'bolder', 'lighter'];
+var FONT_NAME_WEIGHTS_WITHOUT_NORMAL = ['bold', 'bolder', 'lighter'];
+
+var WHOLE_PIXEL_VALUE = /(?:^|\s|\()(-?\d+)px/;
+var TIME_VALUE = /^(\-?[\d\.]+)(m?s)$/;
+
+var valueMinifiers = {
+  'background': function (value, index, total) {
+    return index === 0 && total == 1 && (value == 'none' || value == 'transparent') ? '0 0' : value;
+  },
+  'font-weight': function (value) {
+    if (value == 'normal')
+      return '400';
+    else if (value == 'bold')
+      return '700';
+    else
+      return value;
+  },
+  'outline': function (value, index, total) {
+    return index === 0 && total == 1 && value == 'none' ? '0' : value;
+  }
+};
+
+function isNegative(property, idx) {
+  return property.value[idx] && property.value[idx][0][0] == '-' && parseFloat(property.value[idx][0]) < 0;
+}
+
+function zeroMinifier(name, value) {
+  if (value.indexOf('0') == -1)
+    return value;
+
+  if (value.indexOf('-') > -1) {
+    value = value
+      .replace(/([^\w\d\-]|^)\-0([^\.]|$)/g, '$10$2')
+      .replace(/([^\w\d\-]|^)\-0([^\.]|$)/g, '$10$2');
+  }
+
+  return value
+    .replace(/(^|\s)0+([1-9])/g, '$1$2')
+    .replace(/(^|\D)\.0+(\D|$)/g, '$10$2')
+    .replace(/(^|\D)\.0+(\D|$)/g, '$10$2')
+    .replace(/\.([1-9]*)0+(\D|$)/g, function (match, nonZeroPart, suffix) {
+      return (nonZeroPart.length > 0 ? '.' : '') + nonZeroPart + suffix;
+    })
+    .replace(/(^|\D)0\.(\d)/g, '$1.$2');
+}
+
+function zeroDegMinifier(_, value) {
+  if (value.indexOf('0deg') == -1)
+    return value;
+
+  return value.replace(/\(0deg\)/g, '(0)');
+}
+
+function whitespaceMinifier(name, value) {
+  if (name.indexOf('filter') > -1 || value.indexOf(' ') == -1)
+    return value;
+
+  value = value.replace(/\s+/g, ' ');
+
+  if (value.indexOf('calc') > -1)
+    value = value.replace(/\) ?\/ ?/g, ')/ ');
+
+  return value
+    .replace(/\( /g, '(')
+    .replace(/ \)/g, ')')
+    .replace(/, /g, ',');
+}
+
+function precisionMinifier(_, value, precisionOptions) {
+  if (precisionOptions.value === -1 || value.indexOf('.') === -1)
+    return value;
+
+  return value
+    .replace(precisionOptions.regexp, function (match, number) {
+      return Math.round(parseFloat(number) * precisionOptions.multiplier) / precisionOptions.multiplier + 'px';
+    })
+    .replace(/(\d)\.($|\D)/g, '$1$2');
+}
+
+function unitMinifier(name, value, unitsRegexp) {
+  if (/^(?:\-moz\-calc|\-webkit\-calc|calc)\(/.test(value))
+    return value;
+
+  if (name == 'flex' || name == '-ms-flex' || name == '-webkit-flex' || name == 'flex-basis' || name == '-webkit-flex-basis')
+    return value;
+
+  if (value.indexOf('%') > 0 && (name == 'height' || name == 'max-height'))
+    return value;
+
+  return value
+    .replace(unitsRegexp, '$1' + '0' + '$2')
+    .replace(unitsRegexp, '$1' + '0' + '$2');
+}
+
+function multipleZerosMinifier(property) {
+  var values = property.value;
+  var spliceAt;
+
+  if (values.length == 4 && values[0][0] === '0' && values[1][0] === '0' && values[2][0] === '0' && values[3][0] === '0') {
+    if (property.name.indexOf('box-shadow') > -1)
+      spliceAt = 2;
+    else
+      spliceAt = 1;
+  }
+
+  if (spliceAt) {
+    property.value.splice(spliceAt);
+    property.dirty = true;
+  }
+}
+
+function colorMininifier(name, value, compatibility) {
+  if (value.indexOf('#') === -1 && value.indexOf('rgb') == -1 && value.indexOf('hsl') == -1)
+    return HexNameShortener.shorten(value);
+
+  value = value
+    .replace(/rgb\((\-?\d+),(\-?\d+),(\-?\d+)\)/g, function (match, red, green, blue) {
+      return new RGB(red, green, blue).toHex();
+    })
+    .replace(/hsl\((-?\d+),(-?\d+)%?,(-?\d+)%?\)/g, function (match, hue, saturation, lightness) {
+      return new HSL(hue, saturation, lightness).toHex();
+    })
+    .replace(/(^|[^='"])#([0-9a-f]{6})/gi, function (match, prefix, color) {
+      if (color[0] == color[1] && color[2] == color[3] && color[4] == color[5])
+        return prefix + '#' + color[0] + color[2] + color[4];
+      else
+        return prefix + '#' + color;
+    })
+    .replace(/(rgb|rgba|hsl|hsla)\(([^\)]+)\)/g, function (match, colorFunction, colorDef) {
+      var tokens = colorDef.split(',');
+      var applies = (colorFunction == 'hsl' && tokens.length == 3) ||
+        (colorFunction == 'hsla' && tokens.length == 4) ||
+        (colorFunction == 'rgb' && tokens.length == 3 && colorDef.indexOf('%') > 0) ||
+        (colorFunction == 'rgba' && tokens.length == 4 && colorDef.indexOf('%') > 0);
+      if (!applies)
+        return match;
+
+      if (tokens[1].indexOf('%') == -1)
+        tokens[1] += '%';
+      if (tokens[2].indexOf('%') == -1)
+        tokens[2] += '%';
+      return colorFunction + '(' + tokens.join(',') + ')';
+    });
+
+  if (compatibility.colors.opacity && name.indexOf('background') == -1) {
+    value = value.replace(/(?:rgba|hsla)\(0,0%?,0%?,0\)/g, function (match) {
+      if (split(value, ',').pop().indexOf('gradient(') > -1)
+        return match;
+
+      return 'transparent';
+    });
+  }
+
+  return HexNameShortener.shorten(value);
+}
+
+function pixelLengthMinifier(_, value, compatibility) {
+  if (!WHOLE_PIXEL_VALUE.test(value))
+    return value;
+
+  return value.replace(WHOLE_PIXEL_VALUE, function (match, val) {
+    var newValue;
+    var intVal = parseInt(val);
+
+    if (intVal === 0)
+      return match;
+
+    if (compatibility.properties.shorterLengthUnits && compatibility.units.pt && intVal * 3 % 4 === 0)
+      newValue = intVal * 3 / 4 + 'pt';
+
+    if (compatibility.properties.shorterLengthUnits && compatibility.units.pc && intVal % 16 === 0)
+      newValue = intVal / 16 + 'pc';
+
+    if (compatibility.properties.shorterLengthUnits && compatibility.units.in && intVal % 96 === 0)
+      newValue = intVal / 96 + 'in';
+
+    if (newValue)
+      newValue = match.substring(0, match.indexOf(val)) + newValue;
+
+    return newValue && newValue.length < match.length ? newValue : match;
+  });
+}
+
+function timeUnitMinifier(_, value) {
+  if (!TIME_VALUE.test(value))
+    return value;
+
+  return value.replace(TIME_VALUE, function (match, val, unit) {
+    var newValue;
+
+    if (unit == 'ms') {
+      newValue = parseInt(val) / 1000 + 's';
+    } else if (unit == 's') {
+      newValue = parseFloat(val) * 1000 + 'ms';
+    }
+
+    return newValue.length < match.length ? newValue : match;
+  });
+}
+
+function minifyBorderRadius(property) {
+  var values = property.value;
+  var spliceAt;
+
+  if (values.length == 3 && values[1][0] == '/' && values[0][0] == values[2][0])
+    spliceAt = 1;
+  else if (values.length == 5 && values[2][0] == '/' && values[0][0] == values[3][0] && values[1][0] == values[4][0])
+    spliceAt = 2;
+  else if (values.length == 7 && values[3][0] == '/' && values[0][0] == values[4][0] && values[1][0] == values[5][0] && values[2][0] == values[6][0])
+    spliceAt = 3;
+  else if (values.length == 9 && values[4][0] == '/' && values[0][0] == values[5][0] && values[1][0] == values[6][0] && values[2][0] == values[7][0] && values[3][0] == values[8][0])
+    spliceAt = 4;
+
+  if (spliceAt) {
+    property.value.splice(spliceAt);
+    property.dirty = true;
+  }
+}
+
+function minifyFilter(property) {
+  if (property.value.length == 1) {
+    property.value[0][0] = property.value[0][0].replace(/progid:DXImageTransform\.Microsoft\.(Alpha|Chroma)(\W)/, function (match, filter, suffix) {
+      return filter.toLowerCase() + suffix;
+    });
+  }
+
+  property.value[0][0] = property.value[0][0]
+    .replace(/,(\S)/g, ', $1')
+    .replace(/ ?= ?/g, '=');
+}
+
+function minifyFont(property) {
+  var values = property.value;
+  var hasNumeral = FONT_NUMERAL_WEIGHTS.indexOf(values[0][0]) > -1 ||
+    values[1] && FONT_NUMERAL_WEIGHTS.indexOf(values[1][0]) > -1 ||
+    values[2] && FONT_NUMERAL_WEIGHTS.indexOf(values[2][0]) > -1;
+
+  if (hasNumeral)
+    return;
+
+  if (values[1] == '/')
+    return;
+
+  var normalCount = 0;
+  if (values[0][0] == 'normal')
+    normalCount++;
+  if (values[1] && values[1][0] == 'normal')
+    normalCount++;
+  if (values[2] && values[2][0] == 'normal')
+    normalCount++;
+
+  if (normalCount > 1)
+    return;
+
+  var toOptimize;
+  if (FONT_NAME_WEIGHTS_WITHOUT_NORMAL.indexOf(values[0][0]) > -1)
+    toOptimize = 0;
+  else if (values[1] && FONT_NAME_WEIGHTS_WITHOUT_NORMAL.indexOf(values[1][0]) > -1)
+    toOptimize = 1;
+  else if (values[2] && FONT_NAME_WEIGHTS_WITHOUT_NORMAL.indexOf(values[2][0]) > -1)
+    toOptimize = 2;
+  else if (FONT_NAME_WEIGHTS.indexOf(values[0][0]) > -1)
+    toOptimize = 0;
+  else if (values[1] && FONT_NAME_WEIGHTS.indexOf(values[1][0]) > -1)
+    toOptimize = 1;
+  else if (values[2] && FONT_NAME_WEIGHTS.indexOf(values[2][0]) > -1)
+    toOptimize = 2;
+
+  if (toOptimize !== undefined) {
+    property.value[toOptimize][0] = valueMinifiers['font-weight'](values[toOptimize][0]);
+    property.dirty = true;
+  }
+}
+
+function optimizeBody(properties, options) {
+  var property, name, value;
+  var _properties = wrapForOptimizing(properties);
+
+  for (var i = 0, l = _properties.length; i < l; i++) {
+    property = _properties[i];
+    name = property.name;
+
+    if (property.hack && (
+        (property.hack == 'star' || property.hack == 'underscore') && !options.compatibility.properties.iePrefixHack ||
+        property.hack == 'backslash' && !options.compatibility.properties.ieSuffixHack ||
+        property.hack == 'bang' && !options.compatibility.properties.ieBangHack))
+      property.unused = true;
+
+    if (name.indexOf('padding') === 0 && (isNegative(property, 0) || isNegative(property, 1) || isNegative(property, 2) || isNegative(property, 3)))
+      property.unused = true;
+
+    if (property.unused)
+      continue;
+
+    if (property.variable) {
+      if (property.block)
+        optimizeBody(property.value[0], options);
+      continue;
+    }
+
+    for (var j = 0, m = property.value.length; j < m; j++) {
+      value = property.value[j][0];
+
+      if (valueMinifiers[name])
+        value = valueMinifiers[name](value, j, m);
+
+      value = whitespaceMinifier(name, value);
+      value = precisionMinifier(name, value, options.precision);
+      value = pixelLengthMinifier(name, value, options.compatibility);
+      value = timeUnitMinifier(name, value);
+      value = zeroMinifier(name, value);
+      if (options.compatibility.properties.zeroUnits) {
+        value = zeroDegMinifier(name, value);
+        value = unitMinifier(name, value, options.unitsRegexp);
+      }
+      if (options.compatibility.properties.colors)
+        value = colorMininifier(name, value, options.compatibility);
+
+      property.value[j][0] = value;
+    }
+
+    multipleZerosMinifier(property);
+
+    if (name.indexOf('border') === 0 && name.indexOf('radius') > 0)
+      minifyBorderRadius(property);
+    else if (name == 'filter')
+      minifyFilter(property);
+    else if (name == 'font')
+      minifyFont(property);
+  }
+
+  restoreFromOptimizing(_properties, true);
+  removeUnused(_properties);
+}
+
+function cleanupCharsets(tokens) {
+  var hasCharset = false;
+
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    var token = tokens[i];
+
+    if (token[0] != 'at-rule')
+      continue;
+
+    if (!CHARSET_REGEXP.test(token[1][0]))
+      continue;
+
+    if (hasCharset || token[1][0].indexOf(CHARSET_TOKEN) == -1) {
+      tokens.splice(i, 1);
+      i--;
+      l--;
+    } else {
+      hasCharset = true;
+      tokens.splice(i, 1);
+      tokens.unshift(['at-rule', [token[1][0].replace(CHARSET_REGEXP, CHARSET_TOKEN)]]);
+    }
+  }
+}
+
+function buildUnitRegexp(options) {
+  var units = ['px', 'em', 'ex', 'cm', 'mm', 'in', 'pt', 'pc', '%'];
+  var otherUnits = ['ch', 'rem', 'vh', 'vm', 'vmax', 'vmin', 'vw'];
+
+  otherUnits.forEach(function (unit) {
+    if (options.compatibility.units[unit])
+      units.push(unit);
+  });
+
+  return new RegExp('(^|\\s|\\(|,)0(?:' + units.join('|') + ')(\\W|$)', 'g');
+}
+
+function buildPrecision(options) {
+  var precision = {};
+
+  precision.value = options.roundingPrecision === undefined ?
+    DEFAULT_ROUNDING_PRECISION :
+    options.roundingPrecision;
+  precision.multiplier = Math.pow(10, precision.value);
+  precision.regexp = new RegExp('(\\d*\\.\\d{' + (precision.value + 1) + ',})px', 'g');
+
+  return precision;
+}
+
+function optimize(tokens, options, context) {
+  var ie7Hack = options.compatibility.selectors.ie7Hack;
+  var adjacentSpace = options.compatibility.selectors.adjacentSpace;
+  var spaceAfterClosingBrace = options.compatibility.properties.spaceAfterClosingBrace;
+  var mayHaveCharset = false;
+  var afterContent = false;
+
+  options.unitsRegexp = buildUnitRegexp(options);
+  options.precision = buildPrecision(options);
+
+  for (var i = 0, l = tokens.length; i < l; i++) {
+    var token = tokens[i];
+
+    switch (token[0]) {
+      case 'selector':
+        token[1] = cleanUpSelectors(token[1], !ie7Hack, adjacentSpace);
+        optimizeBody(token[2], options);
+        afterContent = true;
+        break;
+      case 'block':
+        cleanUpBlock(token[1], spaceAfterClosingBrace);
+        optimize(token[2], options, context);
+        afterContent = true;
+        break;
+      case 'flat-block':
+        cleanUpBlock(token[1], spaceAfterClosingBrace);
+        optimizeBody(token[2], options);
+        afterContent = true;
+        break;
+      case 'at-rule':
+        cleanUpAtRule(token[1]);
+        mayHaveCharset = true;
+    }
+
+    if (token[0] == 'at-rule' && IMPORT_REGEXP.test(token[1]) && afterContent) {
+      context.warnings.push('Ignoring @import rule "' + token[1] + '" as it appears after rules thus browsers will ignore them.');
+      token[1] = '';
+    }
+
+    if (token[1].length === 0 || (token[2] && token[2].length === 0)) {
+      tokens.splice(i, 1);
+      i--;
+      l--;
+    }
+  }
+
+  if (mayHaveCharset)
+    cleanupCharsets(tokens);
+}
+
+module.exports = optimize;