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* cssfilter\n *\n * @author 老雷<leizongmin@gmail.com>\n */\n\nvar DEFAULT = require('./default');\nvar FilterCSS = require('./css');\n\n\n/**\n * XSS过滤\n *\n * @param {String} css 要过滤的CSS代码\n * @param {Object} options 选项：whiteList, onAttr, onIgnoreAttr\n * @return {String}\n */\nfunction filterCSS (html, options) {\n  var xss = new FilterCSS(options);\n  return xss.process(html);\n}\n\n\n// 输出\nexports = module.exports = filterCSS;\nexports.FilterCSS = FilterCSS;\nfor (var i in DEFAULT) exports[i] = DEFAULT[i];\n\n// 在浏览器端使用\nif (typeof window !== 'undefined') {\n  window.filterCSS = module.exports;\n}\n","/**\n * cssfilter\n *\n * @author 老雷<leizongmin@gmail.com>\n */\n\nfunction getDefaultWhiteList () {\n  // 白名单值说明：\n  // true: 允许该属性\n  // Function: function (val) { } 返回true表示允许该属性，其他值均表示不允许\n  // RegExp: regexp.test(val) 返回true表示允许该属性，其他值均表示不允许\n  // 除上面列出的值外均表示不允许\n  var whiteList = {};\n\n  whiteList['align-content'] = false; // default: auto\n  whiteList['align-items'] = false; // default: auto\n  whiteList['align-self'] = false; // default: auto\n  whiteList['alignment-adjust'] = false; // default: auto\n  whiteList['alignment-baseline'] = false; // default: baseline\n  whiteList['all'] = false; // default: depending on individual properties\n  whiteList['anchor-point'] = false; // default: none\n  whiteList['animation'] = false; // default: depending on individual properties\n  whiteList['animation-delay'] = false; // default: 0\n  whiteList['animation-direction'] = false; // default: normal\n  whiteList['animation-duration'] = false; // default: 0\n  whiteList['animation-fill-mode'] = false; // default: none\n  whiteList['animation-iteration-count'] = false; // default: 1\n  whiteList['animation-name'] = false; // default: none\n  whiteList['animation-play-state'] = false; // default: running\n  whiteList['animation-timing-function'] = false; // default: ease\n  whiteList['azimuth'] = false; // default: center\n  whiteList['backface-visibility'] = false; // default: visible\n  whiteList['background'] = true; // default: depending on individual properties\n  whiteList['background-attachment'] = true; // default: scroll\n  whiteList['background-clip'] = true; // default: border-box\n  whiteList['background-color'] = true; // default: transparent\n  whiteList['background-image'] = true; // default: none\n  whiteList['background-origin'] = true; // default: padding-box\n  whiteList['background-position'] = true; // default: 0% 0%\n  whiteList['background-repeat'] = true; // default: repeat\n  whiteList['background-size'] = true; // default: auto\n  whiteList['baseline-shift'] = false; // default: baseline\n  whiteList['binding'] = false; // default: none\n  whiteList['bleed'] = false; // default: 6pt\n  whiteList['bookmark-label'] = false; // default: content()\n  whiteList['bookmark-level'] = false; // default: none\n  whiteList['bookmark-state'] = false; // default: open\n  whiteList['border'] = true; // default: depending on individual properties\n  whiteList['border-bottom'] = true; // default: depending on individual properties\n  whiteList['border-bottom-color'] = true; // default: current color\n  whiteList['border-bottom-left-radius'] = true; // default: 0\n  whiteList['border-bottom-right-radius'] = true; // default: 0\n  whiteList['border-bottom-style'] = true; // default: none\n  whiteList['border-bottom-width'] = true; // default: medium\n  whiteList['border-collapse'] = true; // default: separate\n  whiteList['border-color'] = true; // default: depending on individual properties\n  whiteList['border-image'] = true; // default: none\n  whiteList['border-image-outset'] = true; // default: 0\n  whiteList['border-image-repeat'] = true; // default: stretch\n  whiteList['border-image-slice'] = true; // default: 100%\n  whiteList['border-image-source'] = true; // default: none\n  whiteList['border-image-width'] = true; // default: 1\n  whiteList['border-left'] = true; // default: depending on individual properties\n  whiteList['border-left-color'] = true; // default: current color\n  whiteList['border-left-style'] = true; // default: none\n  whiteList['border-left-width'] = true; // default: medium\n  whiteList['border-radius'] = true; // default: 0\n  whiteList['border-right'] = true; // default: depending on individual properties\n  whiteList['border-right-color'] = true; // default: current color\n  whiteList['border-right-style'] = true; // default: none\n  whiteList['border-right-width'] = true; // default: medium\n  whiteList['border-spacing'] = true; // default: 0\n  whiteList['border-style'] = true; // default: depending on individual properties\n  whiteList['border-top'] = true; // default: depending on individual properties\n  whiteList['border-top-color'] = true; // default: current color\n  whiteList['border-top-left-radius'] = true; // default: 0\n  whiteList['border-top-right-radius'] = true; // default: 0\n  whiteList['border-top-style'] = true; // default: none\n  whiteList['border-top-width'] = true; // default: medium\n  whiteList['border-width'] = true; // default: depending on individual properties\n  whiteList['bottom'] = false; // default: auto\n  whiteList['box-decoration-break'] = true; // default: slice\n  whiteList['box-shadow'] = true; // default: none\n  whiteList['box-sizing'] = true; // default: content-box\n  whiteList['box-snap'] = true; // default: none\n  whiteList['box-suppress'] = true; // default: show\n  whiteList['break-after'] = true; // default: auto\n  whiteList['break-before'] = true; // default: auto\n  whiteList['break-inside'] = true; // default: auto\n  whiteList['caption-side'] = false; // default: top\n  whiteList['chains'] = false; // default: none\n  whiteList['clear'] = true; // default: none\n  whiteList['clip'] = false; // default: auto\n  whiteList['clip-path'] = false; // default: none\n  whiteList['clip-rule'] = false; // default: nonzero\n  whiteList['color'] = true; // default: implementation dependent\n  whiteList['color-interpolation-filters'] = true; // default: auto\n  whiteList['column-count'] = false; // default: auto\n  whiteList['column-fill'] = false; // default: balance\n  whiteList['column-gap'] = false; // default: normal\n  whiteList['column-rule'] = false; // default: depending on individual properties\n  whiteList['column-rule-color'] = false; // default: current color\n  whiteList['column-rule-style'] = false; // default: medium\n  whiteList['column-rule-width'] = false; // default: medium\n  whiteList['column-span'] = false; // default: none\n  whiteList['column-width'] = false; // default: auto\n  whiteList['columns'] = false; // default: depending on individual properties\n  whiteList['contain'] = false; // default: none\n  whiteList['content'] = false; // default: normal\n  whiteList['counter-increment'] = false; // default: none\n  whiteList['counter-reset'] = false; // default: none\n  whiteList['counter-set'] = false; // default: none\n  whiteList['crop'] = false; // default: auto\n  whiteList['cue'] = false; // default: depending on individual properties\n  whiteList['cue-after'] = false; // default: none\n  whiteList['cue-before'] = false; // default: none\n  whiteList['cursor'] = false; // default: auto\n  whiteList['direction'] = false; // default: ltr\n  whiteList['display'] = true; // default: depending on individual properties\n  whiteList['display-inside'] = true; // default: auto\n  whiteList['display-list'] = true; // default: none\n  whiteList['display-outside'] = true; // default: inline-level\n  whiteList['dominant-baseline'] = false; // default: auto\n  whiteList['elevation'] = false; // default: level\n  whiteList['empty-cells'] = false; // default: show\n  whiteList['filter'] = false; // default: none\n  whiteList['flex'] = false; // default: depending on individual properties\n  whiteList['flex-basis'] = false; // default: auto\n  whiteList['flex-direction'] = false; // default: row\n  whiteList['flex-flow'] = false; // default: depending on individual properties\n  whiteList['flex-grow'] = false; // default: 0\n  whiteList['flex-shrink'] = false; // default: 1\n  whiteList['flex-wrap'] = false; // default: nowrap\n  whiteList['float'] = false; // default: none\n  whiteList['float-offset'] = false; // default: 0 0\n  whiteList['flood-color'] = false; // default: black\n  whiteList['flood-opacity'] = false; // default: 1\n  whiteList['flow-from'] = false; // default: none\n  whiteList['flow-into'] = false; // default: none\n  whiteList['font'] = true; // default: depending on individual properties\n  whiteList['font-family'] = true; // default: implementation dependent\n  whiteList['font-feature-settings'] = true; // default: normal\n  whiteList['font-kerning'] = true; // default: auto\n  whiteList['font-language-override'] = true; // default: normal\n  whiteList['font-size'] = true; // default: medium\n  whiteList['font-size-adjust'] = true; // default: none\n  whiteList['font-stretch'] = true; // default: normal\n  whiteList['font-style'] = true; // default: normal\n  whiteList['font-synthesis'] = true; // default: weight style\n  whiteList['font-variant'] = true; // default: normal\n  whiteList['font-variant-alternates'] = true; // default: normal\n  whiteList['font-variant-caps'] = true; // default: normal\n  whiteList['font-variant-east-asian'] = true; // default: normal\n  whiteList['font-variant-ligatures'] = true; // default: normal\n  whiteList['font-variant-numeric'] = true; // default: normal\n  whiteList['font-variant-position'] = true; // default: normal\n  whiteList['font-weight'] = true; // default: normal\n  whiteList['grid'] = false; // default: depending on individual properties\n  whiteList['grid-area'] = false; // default: depending on individual properties\n  whiteList['grid-auto-columns'] = false; // default: auto\n  whiteList['grid-auto-flow'] = false; // default: none\n  whiteList['grid-auto-rows'] = false; // default: auto\n  whiteList['grid-column'] = false; // default: depending on individual properties\n  whiteList['grid-column-end'] = false; // default: auto\n  whiteList['grid-column-start'] = false; // default: auto\n  whiteList['grid-row'] = false; // default: depending on individual properties\n  whiteList['grid-row-end'] = false; // default: auto\n  whiteList['grid-row-start'] = false; // default: auto\n  whiteList['grid-template'] = false; // default: depending on individual properties\n  whiteList['grid-template-areas'] = false; // default: none\n  whiteList['grid-template-columns'] = false; // default: none\n  whiteList['grid-template-rows'] = false; // default: none\n  whiteList['hanging-punctuation'] = false; // default: none\n  whiteList['height'] = true; // default: auto\n  whiteList['hyphens'] = false; // default: manual\n  whiteList['icon'] = false; // default: auto\n  whiteList['image-orientation'] = false; // default: auto\n  whiteList['image-resolution'] = false; // default: normal\n  whiteList['ime-mode'] = false; // default: auto\n  whiteList['initial-letters'] = false; // default: normal\n  whiteList['inline-box-align'] = false; // default: last\n  whiteList['justify-content'] = false; // default: auto\n  whiteList['justify-items'] = false; // default: auto\n  whiteList['justify-self'] = false; // default: auto\n  whiteList['left'] = false; // default: auto\n  whiteList['letter-spacing'] = true; // default: normal\n  whiteList['lighting-color'] = true; // default: white\n  whiteList['line-box-contain'] = false; // default: block inline replaced\n  whiteList['line-break'] = false; // default: auto\n  whiteList['line-grid'] = false; // default: match-parent\n  whiteList['line-height'] = false; // default: normal\n  whiteList['line-snap'] = false; // default: none\n  whiteList['line-stacking'] = false; // default: depending on individual properties\n  whiteList['line-stacking-ruby'] = false; // default: exclude-ruby\n  whiteList['line-stacking-shift'] = false; // default: consider-shifts\n  whiteList['line-stacking-strategy'] = false; // default: inline-line-height\n  whiteList['list-style'] = true; // default: depending on individual properties\n  whiteList['list-style-image'] = true; // default: none\n  whiteList['list-style-position'] = true; // default: outside\n  whiteList['list-style-type'] = true; // default: disc\n  whiteList['margin'] = true; // default: depending on individual properties\n  whiteList['margin-bottom'] = true; // default: 0\n  whiteList['margin-left'] = true; // default: 0\n  whiteList['margin-right'] = true; // default: 0\n  whiteList['margin-top'] = true; // default: 0\n  whiteList['marker-offset'] = false; // default: auto\n  whiteList['marker-side'] = false; // default: list-item\n  whiteList['marks'] = false; // default: none\n  whiteList['mask'] = false; // default: border-box\n  whiteList['mask-box'] = false; // default: see individual properties\n  whiteList['mask-box-outset'] = false; // default: 0\n  whiteList['mask-box-repeat'] = false; // default: stretch\n  whiteList['mask-box-slice'] = false; // default: 0 fill\n  whiteList['mask-box-source'] = false; // default: none\n  whiteList['mask-box-width'] = false; // default: auto\n  whiteList['mask-clip'] = false; // default: border-box\n  whiteList['mask-image'] = false; // default: none\n  whiteList['mask-origin'] = false; // default: border-box\n  whiteList['mask-position'] = false; // default: center\n  whiteList['mask-repeat'] = false; // default: no-repeat\n  whiteList['mask-size'] = false; // default: border-box\n  whiteList['mask-source-type'] = false; // default: auto\n  whiteList['mask-type'] = false; // default: luminance\n  whiteList['max-height'] = true; // default: none\n  whiteList['max-lines'] = false; // default: none\n  whiteList['max-width'] = true; // default: none\n  whiteList['min-height'] = true; // default: 0\n  whiteList['min-width'] = true; // default: 0\n  whiteList['move-to'] = false; // default: normal\n  whiteList['nav-down'] = false; // default: auto\n  whiteList['nav-index'] = false; // default: auto\n  whiteList['nav-left'] = false; // default: auto\n  whiteList['nav-right'] = false; // default: auto\n  whiteList['nav-up'] = false; // default: auto\n  whiteList['object-fit'] = false; // default: fill\n  whiteList['object-position'] = false; // default: 50% 50%\n  whiteList['opacity'] = false; // default: 1\n  whiteList['order'] = false; // default: 0\n  whiteList['orphans'] = false; // default: 2\n  whiteList['outline'] = false; // default: depending on individual properties\n  whiteList['outline-color'] = false; // default: invert\n  whiteList['outline-offset'] = false; // default: 0\n  whiteList['outline-style'] = false; // default: none\n  whiteList['outline-width'] = false; // default: medium\n  whiteList['overflow'] = false; // default: depending on individual properties\n  whiteList['overflow-wrap'] = false; // default: normal\n  whiteList['overflow-x'] = false; // default: visible\n  whiteList['overflow-y'] = false; // default: visible\n  whiteList['padding'] = true; // default: depending on individual properties\n  whiteList['padding-bottom'] = true; // default: 0\n  whiteList['padding-left'] = true; // default: 0\n  whiteList['padding-right'] = true; // default: 0\n  whiteList['padding-top'] = true; // default: 0\n  whiteList['page'] = false; // default: auto\n  whiteList['page-break-after'] = false; // default: auto\n  whiteList['page-break-before'] = false; // default: auto\n  whiteList['page-break-inside'] = false; // default: auto\n  whiteList['page-policy'] = false; // default: start\n  whiteList['pause'] = false; // default: implementation dependent\n  whiteList['pause-after'] = false; // default: implementation dependent\n  whiteList['pause-before'] = false; // default: implementation dependent\n  whiteList['perspective'] = false; // default: none\n  whiteList['perspective-origin'] = false; // default: 50% 50%\n  whiteList['pitch'] = false; // default: medium\n  whiteList['pitch-range'] = false; // default: 50\n  whiteList['play-during'] = false; // default: auto\n  whiteList['position'] = false; // default: static\n  whiteList['presentation-level'] = false; // default: 0\n  whiteList['quotes'] = false; // default: text\n  whiteList['region-fragment'] = false; // default: auto\n  whiteList['resize'] = false; // default: none\n  whiteList['rest'] = false; // default: depending on individual properties\n  whiteList['rest-after'] = false; // default: none\n  whiteList['rest-before'] = false; // default: none\n  whiteList['richness'] = false; // default: 50\n  whiteList['right'] = false; // default: auto\n  whiteList['rotation'] = false; // default: 0\n  whiteList['rotation-point'] = false; // default: 50% 50%\n  whiteList['ruby-align'] = false; // default: auto\n  whiteList['ruby-merge'] = false; // default: separate\n  whiteList['ruby-position'] = false; // default: before\n  whiteList['shape-image-threshold'] = false; // default: 0.0\n  whiteList['shape-outside'] = false; // default: none\n  whiteList['shape-margin'] = false; // default: 0\n  whiteList['size'] = false; // default: auto\n  whiteList['speak'] = false; // default: auto\n  whiteList['speak-as'] = false; // default: normal\n  whiteList['speak-header'] = false; // default: once\n  whiteList['speak-numeral'] = false; // default: continuous\n  whiteList['speak-punctuation'] = false; // default: none\n  whiteList['speech-rate'] = false; // default: medium\n  whiteList['stress'] = false; // default: 50\n  whiteList['string-set'] = false; // default: none\n  whiteList['tab-size'] = false; // default: 8\n  whiteList['table-layout'] = false; // default: auto\n  whiteList['text-align'] = true; // default: start\n  whiteList['text-align-last'] = true; // default: auto\n  whiteList['text-combine-upright'] = true; // default: none\n  whiteList['text-decoration'] = true; // default: none\n  whiteList['text-decoration-color'] = true; // default: currentColor\n  whiteList['text-decoration-line'] = true; // default: none\n  whiteList['text-decoration-skip'] = true; // default: objects\n  whiteList['text-decoration-style'] = true; // default: solid\n  whiteList['text-emphasis'] = true; // default: depending on individual properties\n  whiteList['text-emphasis-color'] = true; // default: currentColor\n  whiteList['text-emphasis-position'] = true; // default: over right\n  whiteList['text-emphasis-style'] = true; // default: none\n  whiteList['text-height'] = true; // default: auto\n  whiteList['text-indent'] = true; // default: 0\n  whiteList['text-justify'] = true; // default: auto\n  whiteList['text-orientation'] = true; // default: mixed\n  whiteList['text-overflow'] = true; // default: clip\n  whiteList['text-shadow'] = true; // default: none\n  whiteList['text-space-collapse'] = true; // default: collapse\n  whiteList['text-transform'] = true; // default: none\n  whiteList['text-underline-position'] = true; // default: auto\n  whiteList['text-wrap'] = true; // default: normal\n  whiteList['top'] = false; // default: auto\n  whiteList['transform'] = false; // default: none\n  whiteList['transform-origin'] = false; // default: 50% 50% 0\n  whiteList['transform-style'] = false; // default: flat\n  whiteList['transition'] = false; // default: depending on individual properties\n  whiteList['transition-delay'] = false; // default: 0s\n  whiteList['transition-duration'] = false; // default: 0s\n  whiteList['transition-property'] = false; // default: all\n  whiteList['transition-timing-function'] = false; // default: ease\n  whiteList['unicode-bidi'] = false; // default: normal\n  whiteList['vertical-align'] = false; // default: baseline\n  whiteList['visibility'] = false; // default: visible\n  whiteList['voice-balance'] = false; // default: center\n  whiteList['voice-duration'] = false; // default: auto\n  whiteList['voice-family'] = false; // default: implementation dependent\n  whiteList['voice-pitch'] = false; // default: medium\n  whiteList['voice-range'] = false; // default: medium\n  whiteList['voice-rate'] = false; // default: normal\n  whiteList['voice-stress'] = false; // default: normal\n  whiteList['voice-volume'] = false; // default: medium\n  whiteList['volume'] = false; // default: medium\n  whiteList['white-space'] = false; // default: normal\n  whiteList['widows'] = false; // default: 2\n  whiteList['width'] = true; // default: auto\n  whiteList['will-change'] = false; // default: auto\n  whiteList['word-break'] = true; // default: normal\n  whiteList['word-spacing'] = true; // default: normal\n  whiteList['word-wrap'] = true; // default: normal\n  whiteList['wrap-flow'] = false; // default: auto\n  whiteList['wrap-through'] = false; // default: wrap\n  whiteList['writing-mode'] = false; // default: horizontal-tb\n  whiteList['z-index'] = false; // default: auto\n\n  return whiteList;\n}\n\n\n/**\n * 匹配到白名单上的一个属性时\n *\n * @param {String} name\n * @param {String} value\n * @param {Object} options\n * @return {String}\n */\nfunction onAttr (name, value, options) {\n  // do nothing\n}\n\n/**\n * 匹配到不在白名单上的一个属性时\n *\n * @param {String} name\n * @param {String} value\n * @param {Object} options\n * @return {String}\n */\nfunction onIgnoreAttr (name, value, options) {\n  // do nothing\n}\n\nvar REGEXP_URL_JAVASCRIPT = /javascript\\s*\\:/img;\n\n/**\n * 过滤属性值\n *\n * @param {String} name\n * @param {String} value\n * @return {String}\n */\nfunction safeAttrValue(name, value) {\n  if (REGEXP_URL_JAVASCRIPT.test(value)) return '';\n  return value;\n}\n\n\nexports.whiteList = getDefaultWhiteList();\nexports.getDefaultWhiteList = getDefaultWhiteList;\nexports.onAttr = onAttr;\nexports.onIgnoreAttr = onIgnoreAttr;\nexports.safeAttrValue = safeAttrValue;\n","module.exports = {\n  indexOf: function (arr, item) {\n    var i, j;\n    if (Array.prototype.indexOf) {\n      return arr.indexOf(item);\n    }\n    for (i = 0, j = arr.length; i < j; i++) {\n      if (arr[i] === item) {\n        return i;\n      }\n    }\n    return -1;\n  },\n  forEach: function (arr, fn, scope) {\n    var i, j;\n    if (Array.prototype.forEach) {\n      return arr.forEach(fn, scope);\n    }\n    for (i = 0, j = arr.length; i < j; i++) {\n      fn.call(scope, arr[i], i, arr);\n    }\n  },\n  trim: function (str) {\n    if (String.prototype.trim) {\n      return str.trim();\n    }\n    return str.replace(/(^\\s*)|(\\s*$)/g, '');\n  },\n  trimRight: function (str) {\n    if (String.prototype.trimRight) {\n      return str.trimRight();\n    }\n    return str.replace(/(\\s*$)/g, '');\n  }\n};\n","/**\n * cssfilter\n *\n * @author 老雷<leizongmin@gmail.com>\n */\n\nvar _ = require('./util');\n\n\n/**\n * 解析style\n *\n * @param {String} css\n * @param {Function} onAttr 处理属性的函数\n *   参数格式： function (sourcePosition, position, name, value, source)\n * @return {String}\n */\nfunction parseStyle (css, onAttr) {\n  css = _.trimRight(css);\n  if (css[css.length - 1] !== ';') css += ';';\n  var cssLength = css.length;\n  var isParenthesisOpen = false;\n  var lastPos = 0;\n  var i = 0;\n  var retCSS = '';\n\n  function addNewAttr () {\n    // 如果没有正常的闭合圆括号，则直接忽略当前属性\n    if (!isParenthesisOpen) {\n      var source = _.trim(css.slice(lastPos, i));\n      var j = source.indexOf(':');\n      if (j !== -1) {\n        var name = _.trim(source.slice(0, j));\n        var value = _.trim(source.slice(j + 1));\n        // 必须有属性名称\n        if (name) {\n          var ret = onAttr(lastPos, retCSS.length, name, value, source);\n          if (ret) retCSS += ret + '; ';\n        }\n      }\n    }\n    lastPos = i + 1;\n  }\n\n  for (; i < cssLength; i++) {\n    var c = css[i];\n    if (c === '/' && css[i + 1] === '*') {\n      // 备注开始\n      var j = css.indexOf('*/', i + 2);\n      // 如果没有正常的备注结束，则后面的部分全部跳过\n      if (j === -1) break;\n      // 直接将当前位置调到备注结尾，并且初始化状态\n      i = j + 1;\n      lastPos = i + 1;\n      isParenthesisOpen = false;\n    } else if (c === '(') {\n      isParenthesisOpen = true;\n    } else if (c === ')') {\n      isParenthesisOpen = false;\n    } else if (c === ';') {\n      if (isParenthesisOpen) {\n        // 在圆括号里面，忽略\n      } else {\n        addNewAttr();\n      }\n    } else if (c === '\\n') {\n      addNewAttr();\n    }\n  }\n\n  return _.trim(retCSS);\n}\n\nmodule.exports = parseStyle;\n","/**\n * cssfilter\n *\n * @author 老雷<leizongmin@gmail.com>\n */\n\nvar DEFAULT = require('./default');\nvar parseStyle = require('./parser');\nvar _ = require('./util');\n\n\n/**\n * 返回值是否为空\n *\n * @param {Object} obj\n * @return {Boolean}\n */\nfunction isNull (obj) {\n  return (obj === undefined || obj === null);\n}\n\n/**\n * 浅拷贝对象\n *\n * @param {Object} obj\n * @return {Object}\n */\nfunction shallowCopyObject (obj) {\n  var ret = {};\n  for (var i in obj) {\n    ret[i] = obj[i];\n  }\n  return ret;\n}\n\n/**\n * 创建CSS过滤器\n *\n * @param {Object} options\n *   - {Object} whiteList\n *   - {Function} onAttr\n *   - {Function} onIgnoreAttr\n *   - {Function} safeAttrValue\n */\nfunction FilterCSS (options) {\n  options = shallowCopyObject(options || {});\n  options.whiteList = options.whiteList || DEFAULT.whiteList;\n  options.onAttr = options.onAttr || DEFAULT.onAttr;\n  options.onIgnoreAttr = options.onIgnoreAttr || DEFAULT.onIgnoreAttr;\n  options.safeAttrValue = options.safeAttrValue || DEFAULT.safeAttrValue;\n  this.options = options;\n}\n\nFilterCSS.prototype.process = function (css) {\n  // 兼容各种奇葩输入\n  css = css || '';\n  css = css.toString();\n  if (!css) return '';\n\n  var me = this;\n  var options = me.options;\n  var whiteList = options.whiteList;\n  var onAttr = options.onAttr;\n  var onIgnoreAttr = options.onIgnoreAttr;\n  var safeAttrValue = options.safeAttrValue;\n\n  var retCSS = parseStyle(css, function (sourcePosition, position, name, value, source) {\n\n    var check = whiteList[name];\n    var isWhite = false;\n    if (check === true) isWhite = check;\n    else if (typeof check === 'function') isWhite = check(value);\n    else if (check instanceof RegExp) isWhite = check.test(value);\n    if (isWhite !== true) isWhite = false;\n\n    // 如果过滤后 value 为空则直接忽略\n    value = safeAttrValue(name, value);\n    if (!value) return;\n\n    var opts = {\n      position: position,\n      sourcePosition: sourcePosition,\n      source: source,\n      isWhite: isWhite\n    };\n\n    if (isWhite) {\n\n      var ret = onAttr(name, value, opts);\n      if (isNull(ret)) {\n        return name + ':' + value;\n      } else {\n        return ret;\n      }\n\n    } else {\n\n      var ret = onIgnoreAttr(name, value, opts);\n      if (!isNull(ret)) {\n        return ret;\n      }\n\n    }\n  });\n\n  return retCSS;\n};\n\n\nmodule.exports = FilterCSS;\n"],"sourceRoot":""}