notes/node_modules/autoprefixer/lib/declaration.js

(function() {
  var Browsers, Declaration, Prefixer, utils,
    extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
    hasProp = {}.hasOwnProperty;

  Prefixer = require('./prefixer');

  Browsers = require('./browsers');

  utils = require('./utils');

  Declaration = (function(superClass) {
    extend(Declaration, superClass);

    function Declaration() {
      return Declaration.__super__.constructor.apply(this, arguments);
    }

    Declaration.prototype.check = function(decl) {
      return true;
    };

    Declaration.prototype.prefixed = function(prop, prefix) {
      return prefix + prop;
    };

    Declaration.prototype.normalize = function(prop) {
      return prop;
    };

    Declaration.prototype.otherPrefixes = function(value, prefix) {
      var j, len, other, ref;
      ref = Browsers.prefixes();
      for (j = 0, len = ref.length; j < len; j++) {
        other = ref[j];
        if (other === prefix) {
          continue;
        }
        if (value.indexOf(other) !== -1) {
          return true;
        }
      }
      return false;
    };

    Declaration.prototype.set = function(decl, prefix) {
      decl.prop = this.prefixed(decl.prop, prefix);
      return decl;
    };

    Declaration.prototype.needCascade = function(decl) {
      return decl._autoprefixerCascade || (decl._autoprefixerCascade = this.all.options.cascade !== false && decl.raw('before').indexOf('\n') !== -1);
    };

    Declaration.prototype.maxPrefixed = function(prefixes, decl) {
      var j, len, max, prefix;
      if (decl._autoprefixerMax) {
        return decl._autoprefixerMax;
      }
      max = 0;
      for (j = 0, len = prefixes.length; j < len; j++) {
        prefix = prefixes[j];
        prefix = utils.removeNote(prefix);
        if (prefix.length > max) {
          max = prefix.length;
        }
      }
      return decl._autoprefixerMax = max;
    };

    Declaration.prototype.calcBefore = function(prefixes, decl, prefix) {
      var before, diff, i, j, max, ref;
      if (prefix == null) {
        prefix = '';
      }
      before = decl.raw('before');
      max = this.maxPrefixed(prefixes, decl);
      diff = max - utils.removeNote(prefix).length;
      for (i = j = 0, ref = diff; 0 <= ref ? j < ref : j > ref; i = 0 <= ref ? ++j : --j) {
        before += ' ';
      }
      return before;
    };

    Declaration.prototype.restoreBefore = function(decl) {
      var lines, min;
      lines = decl.raw('before').split("\n");
      min = lines[lines.length - 1];
      this.all.group(decl).up(function(prefixed) {
        var array, last;
        array = prefixed.raw('before').split("\n");
        last = array[array.length - 1];
        if (last.length < min.length) {
          return min = last;
        }
      });
      lines[lines.length - 1] = min;
      return decl.raws.before = lines.join("\n");
    };

    Declaration.prototype.insert = function(decl, prefix, prefixes) {
      var already, cloned;
      cloned = this.set(this.clone(decl), prefix);
      if (!cloned) {
        return;
      }
      already = decl.parent.some(function(i) {
        return i.prop === cloned.prop && i.value === cloned.value;
      });
      if (already) {
        return;
      }
      if (this.needCascade(decl)) {
        cloned.raws.before = this.calcBefore(prefixes, decl, prefix);
      }
      return decl.parent.insertBefore(decl, cloned);
    };

    Declaration.prototype.isAlready = function(decl, prefixed) {
      var already;
      already = this.all.group(decl).up(function(i) {
        return i.prop === prefixed;
      });
      already || (already = this.all.group(decl).down(function(i) {
        return i.prop === prefixed;
      }));
      return already;
    };

    Declaration.prototype.add = function(decl, prefix, prefixes) {
      var prefixed;
      prefixed = this.prefixed(decl.prop, prefix);
      if (this.isAlready(decl, prefixed) || this.otherPrefixes(decl.value, prefix)) {
        return;
      }
      return this.insert(decl, prefix, prefixes);
    };

    Declaration.prototype.process = function(decl) {
      var prefixes;
      if (this.needCascade(decl)) {
        prefixes = Declaration.__super__.process.apply(this, arguments);
        if (prefixes != null ? prefixes.length : void 0) {
          this.restoreBefore(decl);
          return decl.raws.before = this.calcBefore(prefixes, decl);
        }
      } else {
        return Declaration.__super__.process.apply(this, arguments);
      }
    };

    Declaration.prototype.old = function(prop, prefix) {
      return [this.prefixed(prop, prefix)];
    };

    return Declaration;

  })(Prefixer);

  module.exports = Declaration;

}).call(this);