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1 line
67 KiB
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1 line
67 KiB
JSON
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{"ast":null,"code":"/*\nExtremely simple css parser. Intended to be not more than what we need\nand definitely not necessarily correct =).\n*/\n/** @unrestricted */\nvar StyleNode = /** @class */function () {\n function StyleNode() {\n this.start = 0;\n this.end = 0;\n this.previous = null;\n this.parent = null;\n this.rules = null;\n this.parsedCssText = '';\n this.cssText = '';\n this.atRule = false;\n this.type = 0;\n this.keyframesName = '';\n this.selector = '';\n this.parsedSelector = '';\n }\n return StyleNode;\n}();\n// given a string of css, return a simple rule tree\n/**\n * @param {string} text\n * @return {StyleNode}\n */\nfunction parse(text) {\n text = clean(text);\n return parseCss(lex(text), text);\n}\n// remove stuff we don't care about that may hinder parsing\n/**\n * @param {string} cssText\n * @return {string}\n */\nfunction clean(cssText) {\n return cssText.replace(RX.comments, '').replace(RX.port, '');\n}\n// super simple {...} lexer that returns a node tree\n/**\n * @param {string} text\n * @return {StyleNode}\n */\nfunction lex(text) {\n var root = new StyleNode();\n root['start'] = 0;\n root['end'] = text.length;\n var n = root;\n for (var i = 0, l = text.length; i < l; i++) {\n if (text[i] === OPEN_BRACE) {\n if (!n['rules']) {\n n['rules'] = [];\n }\n var p = n;\n var previous = p['rules'][p['rules'].length - 1] || null;\n n = new StyleNode();\n n['start'] = i + 1;\n n['parent'] = p;\n n['previous'] = previous;\n p['rules'].push(n);\n } else if (text[i] === CLOSE_BRACE) {\n n['end'] = i + 1;\n n = n['parent'] || root;\n }\n }\n return root;\n}\n// add selectors/cssText to node tree\n/**\n * @param {StyleNode} node\n * @param {string} text\n * @return {StyleNode}\n */\nfunction parseCss(node, text) {\n var t = text.substring(node['start'], node['end'] - 1);\n node['parsedCssText'] = node['cssText'] = t.trim();\n if (node.parent) {\n var ss = node.previous ? node.previous['end'] : node.parent['start'];\n t = text.substring(ss, node['start'] - 1);\n t = _expandUnicodeEscapes(t);\n t = t.replace(RX.multipleSpaces, ' ');\n // TODO(sorvell): ad hoc; make selector include only after last ;\n // helps with mixin syntax\n t = t.substring(t.lastIndexOf(';') + 1);\n var s = node['parsedSelector'] = node['selector'] = t.trim();\n node['atRule'] = s.indexOf(AT_START) === 0;\n // note, support a subset of rule types...\n if (node['atRule']) {\n if (s.indexOf(MEDIA_START) === 0) {\n node['type'] = types.MEDIA_RULE;\n } else if (s.match(RX.keyframesRule)) {\n node['type'] = types.KEYFRAMES_RULE;\n node['keyframesName'] = node['selector'].split(RX.multipleSpaces).pop();\n }\n } else {\n if (s.indexOf(VAR_START) === 0) {\n node['type'] = types.MIXIN_RULE;\n } else {\n node['type'] = types.STYLE_RULE;\n }\n }\n }\n var r$ = node['rules'];\n if (r$) {\n for (var i = 0, l = r$.length, r = void 0; i < l && (r = r$[i]); i++) {\n parseCss(r, text);\n }\n }\n return node;\n}\n/**\n * conversion of sort unicode escapes with spaces like `\\33 ` (and longer) into\n * expanded form that doesn't require trailing space `\\000033`\n * @param {string} s\n * @return {string}\n */\nfunction _expandUnicodeEscapes(s) {\n return s.replace(/\\\\([0-9a-f]{1,6})\\s/gi, function () {\n var code = arguments[1],\n repeat = 6 - code.length;\n while (repeat--) {\n code = '0' + code;\n }\n return '\\\\' + code;\n });\n}\n/** @enum {number} */\nvar types = {\n STYLE_RULE: 1,\n KEYFRAMES_RULE: 7,\n MEDIA_RULE: 4,\n MIXIN_RULE: 1000\n};\nvar OPEN_BRACE = '{';\nvar CLOSE_BRACE = '}';\n// helper regexp's\nvar RX = {\n comments: /\\/\\*[^*]*\\*+([^/*][^*]*\\*+)*\\//gim,\n port: /@import[^;]*;/gim,\n customProp: /(?:^[^;\\-\\s}]+)?--[^;{}]*?:[^{};]*?(?:[;\\n]|$)/gim,\n mixinProp: /(?:^[^;\\-\\s}]+)?--[^;{}]*?:[^{};]*?{[^}]*?}(?:[;\\n]|$)?/gim,\n mixinApply: /@apply\\s*\\(?[^)
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