forked from zhurui/management
260 lines
6.8 KiB
JavaScript
260 lines
6.8 KiB
JavaScript
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'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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var _postcss = require('postcss');
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var _postcss2 = _interopRequireDefault(_postcss);
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var _postcssValueParser = require('postcss-value-parser');
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var _postcssValueParser2 = _interopRequireDefault(_postcssValueParser);
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var _has = require('has');
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var _has2 = _interopRequireDefault(_has);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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/*
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* Constants (parser usage)
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*/
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const SINGLE_QUOTE = '\''.charCodeAt(0);
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const DOUBLE_QUOTE = '"'.charCodeAt(0);
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const BACKSLASH = '\\'.charCodeAt(0);
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const NEWLINE = '\n'.charCodeAt(0);
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const SPACE = ' '.charCodeAt(0);
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const FEED = '\f'.charCodeAt(0);
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const TAB = '\t'.charCodeAt(0);
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const CR = '\r'.charCodeAt(0);
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const WORD_END = /[ \n\t\r\f'"\\]/g;
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/*
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* Constants (node type strings)
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*/
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const C_STRING = 'string';
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const C_ESCAPED_SINGLE_QUOTE = 'escapedSingleQuote';
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const C_ESCAPED_DOUBLE_QUOTE = 'escapedDoubleQuote';
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const C_SINGLE_QUOTE = 'singleQuote';
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const C_DOUBLE_QUOTE = 'doubleQuote';
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const C_NEWLINE = 'newline';
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const C_SINGLE = 'single';
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/*
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* Literals
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*/
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const L_SINGLE_QUOTE = `'`;
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const L_DOUBLE_QUOTE = `"`;
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const L_NEWLINE = `\\\n`;
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/*
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* Parser nodes
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*/
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const T_ESCAPED_SINGLE_QUOTE = { type: C_ESCAPED_SINGLE_QUOTE, value: `\\'` };
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const T_ESCAPED_DOUBLE_QUOTE = { type: C_ESCAPED_DOUBLE_QUOTE, value: `\\"` };
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const T_SINGLE_QUOTE = { type: C_SINGLE_QUOTE, value: L_SINGLE_QUOTE };
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const T_DOUBLE_QUOTE = { type: C_DOUBLE_QUOTE, value: L_DOUBLE_QUOTE };
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const T_NEWLINE = { type: C_NEWLINE, value: L_NEWLINE };
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function stringify(ast) {
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return ast.nodes.reduce((str, { value }) => {
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// Collapse multiple line strings automatically
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if (value === L_NEWLINE) {
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return str;
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}
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return str + value;
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}, '');
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}
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function parse(str) {
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let code, next, value;
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let pos = 0;
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let len = str.length;
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const ast = {
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nodes: [],
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types: {
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escapedSingleQuote: 0,
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escapedDoubleQuote: 0,
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singleQuote: 0,
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doubleQuote: 0
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},
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quotes: false
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};
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while (pos < len) {
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code = str.charCodeAt(pos);
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switch (code) {
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case SPACE:
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case TAB:
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case CR:
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case FEED:
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next = pos;
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do {
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next += 1;
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code = str.charCodeAt(next);
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} while (code === SPACE || code === NEWLINE || code === TAB || code === CR || code === FEED);
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ast.nodes.push({
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type: 'space',
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value: str.slice(pos, next)
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});
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pos = next - 1;
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break;
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case SINGLE_QUOTE:
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ast.nodes.push(T_SINGLE_QUOTE);
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ast.types[C_SINGLE_QUOTE]++;
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ast.quotes = true;
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break;
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case DOUBLE_QUOTE:
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ast.nodes.push(T_DOUBLE_QUOTE);
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ast.types[C_DOUBLE_QUOTE]++;
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ast.quotes = true;
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break;
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case BACKSLASH:
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next = pos + 1;
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if (str.charCodeAt(next) === SINGLE_QUOTE) {
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ast.nodes.push(T_ESCAPED_SINGLE_QUOTE);
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ast.types[C_ESCAPED_SINGLE_QUOTE]++;
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ast.quotes = true;
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pos = next;
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break;
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} else if (str.charCodeAt(next) === DOUBLE_QUOTE) {
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ast.nodes.push(T_ESCAPED_DOUBLE_QUOTE);
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ast.types[C_ESCAPED_DOUBLE_QUOTE]++;
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ast.quotes = true;
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pos = next;
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break;
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} else if (str.charCodeAt(next) === NEWLINE) {
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ast.nodes.push(T_NEWLINE);
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pos = next;
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break;
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}
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/*
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* We need to fall through here to handle the token as
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* a whole word. The missing 'break' is intentional.
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*/
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default:
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WORD_END.lastIndex = pos + 1;
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WORD_END.test(str);
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if (WORD_END.lastIndex === 0) {
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next = len - 1;
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} else {
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next = WORD_END.lastIndex - 2;
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}
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value = str.slice(pos, next + 1);
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ast.nodes.push({
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type: C_STRING,
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value
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});
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pos = next;
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}
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pos++;
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}
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return ast;
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}
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function changeWrappingQuotes(node, ast) {
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const { types } = ast;
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if (types[C_SINGLE_QUOTE] || types[C_DOUBLE_QUOTE]) {
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return;
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}
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if (node.quote === L_SINGLE_QUOTE && types[C_ESCAPED_SINGLE_QUOTE] > 0 && !types[C_ESCAPED_DOUBLE_QUOTE]) {
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node.quote = L_DOUBLE_QUOTE;
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}
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if (node.quote === L_DOUBLE_QUOTE && types[C_ESCAPED_DOUBLE_QUOTE] > 0 && !types[C_ESCAPED_SINGLE_QUOTE]) {
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node.quote = L_SINGLE_QUOTE;
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}
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ast.nodes = ast.nodes.reduce((newAst, child) => {
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if (child.type === C_ESCAPED_DOUBLE_QUOTE && node.quote === L_SINGLE_QUOTE) {
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return [...newAst, T_DOUBLE_QUOTE];
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}
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if (child.type === C_ESCAPED_SINGLE_QUOTE && node.quote === L_DOUBLE_QUOTE) {
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return [...newAst, T_SINGLE_QUOTE];
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}
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return [...newAst, child];
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}, []);
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}
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function normalize(value, preferredQuote) {
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if (!value || !value.length) {
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return value;
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}
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return (0, _postcssValueParser2.default)(value).walk(child => {
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if (child.type !== C_STRING) {
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return;
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}
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const ast = parse(child.value);
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if (ast.quotes) {
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changeWrappingQuotes(child, ast);
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} else if (preferredQuote === C_SINGLE) {
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child.quote = L_SINGLE_QUOTE;
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} else {
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child.quote = L_DOUBLE_QUOTE;
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}
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child.value = stringify(ast);
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}).toString();
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}
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const params = {
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rule: 'selector',
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decl: 'value',
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atrule: 'params'
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};
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exports.default = _postcss2.default.plugin('postcss-normalize-string', opts => {
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const { preferredQuote } = Object.assign({}, {
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preferredQuote: 'double'
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}, opts);
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return css => {
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const cache = {};
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css.walk(node => {
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const { type } = node;
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if ((0, _has2.default)(params, type)) {
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const param = params[type];
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const key = node[param] + '|' + preferredQuote;
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if (cache[key]) {
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node[param] = cache[key];
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return;
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}
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const result = normalize(node[param], preferredQuote);
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node[param] = result;
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cache[key] = result;
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}
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});
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};
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});
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module.exports = exports['default'];
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