notes/node_modules/autoprefixer/lib/prefixer.js

(function() {
  var Browsers, Prefixer, clone, utils, vendor,
    hasProp = {}.hasOwnProperty;

  Browsers = require('./browsers');

  utils = require('./utils');

  vendor = require('postcss/lib/vendor');

  clone = function(obj, parent) {
    var cloned, i, value;
    cloned = new obj.constructor();
    for (i in obj) {
      if (!hasProp.call(obj, i)) continue;
      value = obj[i];
      if (i === 'parent' && typeof value === 'object') {
        if (parent) {
          cloned[i] = parent;
        }
      } else if (i === 'source') {
        cloned[i] = value;
      } else if (i === null) {
        cloned[i] = value;
      } else if (value instanceof Array) {
        cloned[i] = value.map(function(i) {
          return clone(i, cloned);
        });
      } else if (i !== '_autoprefixerPrefix' && i !== '_autoprefixerValues') {
        if (typeof value === 'object' && value !== null) {
          value = clone(value, cloned);
        }
        cloned[i] = value;
      }
    }
    return cloned;
  };

  Prefixer = (function() {
    Prefixer.hack = function(klass) {
      var j, len, name, ref, results;
      this.hacks || (this.hacks = {});
      ref = klass.names;
      results = [];
      for (j = 0, len = ref.length; j < len; j++) {
        name = ref[j];
        results.push(this.hacks[name] = klass);
      }
      return results;
    };

    Prefixer.load = function(name, prefixes, all) {
      var klass, ref;
      klass = (ref = this.hacks) != null ? ref[name] : void 0;
      if (klass) {
        return new klass(name, prefixes, all);
      } else {
        return new this(name, prefixes, all);
      }
    };

    Prefixer.clone = function(node, overrides) {
      var cloned, name;
      cloned = clone(node);
      for (name in overrides) {
        cloned[name] = overrides[name];
      }
      return cloned;
    };

    function Prefixer(name1, prefixes1, all1) {
      this.name = name1;
      this.prefixes = prefixes1;
      this.all = all1;
    }

    Prefixer.prototype.parentPrefix = function(node) {
      var prefix;
      prefix = node._autoprefixerPrefix != null ? node._autoprefixerPrefix : node.type === 'decl' && node.prop[0] === '-' ? vendor.prefix(node.prop) : node.type === 'root' ? false : node.type === 'rule' && node.selector.indexOf(':-') !== -1 && /:(-\w+-)/.test(node.selector) ? node.selector.match(/:(-\w+-)/)[1] : node.type === 'atrule' && node.name[0] === '-' ? vendor.prefix(node.name) : this.parentPrefix(node.parent);
      if (Browsers.prefixes().indexOf(prefix) === -1) {
        prefix = false;
      }
      return node._autoprefixerPrefix = prefix;
    };

    Prefixer.prototype.process = function(node) {
      var added, j, k, len, len1, parent, prefix, prefixes, ref;
      if (!this.check(node)) {
        return;
      }
      parent = this.parentPrefix(node);
      prefixes = [];
      ref = this.prefixes;
      for (j = 0, len = ref.length; j < len; j++) {
        prefix = ref[j];
        if (parent && parent !== utils.removeNote(prefix)) {
          continue;
        }
        prefixes.push(prefix);
      }
      added = [];
      for (k = 0, len1 = prefixes.length; k < len1; k++) {
        prefix = prefixes[k];
        if (this.add(node, prefix, added.concat([prefix]))) {
          added.push(prefix);
        }
      }
      return added;
    };

    Prefixer.prototype.clone = function(node, overrides) {
      return Prefixer.clone(node, overrides);
    };

    return Prefixer;

  })();

  module.exports = Prefixer;

}).call(this);