www.aleph1.co.uk Git - yaffs-website/blob - node_modules/postcss/lib/list.js

   1 'use strict';
   2
   3 exports.__esModule = true;
   4 /**
   5  * Contains helpers for safely splitting lists of CSS values,
   6  * preserving parentheses and quotes.
   7  *
   8  * @example
   9  * const list = postcss.list;
  10  *
  11  * @namespace list
  12  */
  13 var list = {
  14     split: function split(string, separators, last) {
  15         var array = [];
  16         var current = '';
  17         var split = false;
  18
  19         var func = 0;
  20         var quote = false;
  21         var escape = false;
  22
  23         for (var i = 0; i < string.length; i++) {
  24             var letter = string[i];
  25
  26             if (quote) {
  27                 if (escape) {
  28                     escape = false;
  29                 } else if (letter === '\\') {
  30                     escape = true;
  31                 } else if (letter === quote) {
  32                     quote = false;
  33                 }
  34             } else if (letter === '"' || letter === '\'') {
  35                 quote = letter;
  36             } else if (letter === '(') {
  37                 func += 1;
  38             } else if (letter === ')') {
  39                 if (func > 0) func -= 1;
  40             } else if (func === 0) {
  41                 if (separators.indexOf(letter) !== -1) split = true;
  42             }
  43
  44             if (split) {
  45                 if (current !== '') array.push(current.trim());
  46                 current = '';
  47                 split = false;
  48             } else {
  49                 current += letter;
  50             }
  51         }
  52
  53         if (last || current !== '') array.push(current.trim());
  54         return array;
  55     },
  56
  57
  58     /**
  59      * Safely splits space-separated values (such as those for `background`,
  60      * `border-radius`, and other shorthand properties).
  61      *
  62      * @param {string} string - space-separated values
  63      *
  64      * @return {string[]} split values
  65      *
  66      * @example
  67      * postcss.list.space('1px calc(10% + 1px)') //=> ['1px', 'calc(10% + 1px)']
  68      */
  69     space: function space(string) {
  70         var spaces = [' ', '\n', '\t'];
  71         return list.split(string, spaces);
  72     },
  73
  74
  75     /**
  76      * Safely splits comma-separated values (such as those for `transition-*`
  77      * and `background` properties).
  78      *
  79      * @param {string} string - comma-separated values
  80      *
  81      * @return {string[]} split values
  82      *
  83      * @example
  84      * postcss.list.comma('black, linear-gradient(white, black)')
  85      * //=> ['black', 'linear-gradient(white, black)']
  86      */
  87     comma: function comma(string) {
  88         var comma = ',';
  89         return list.split(string, [comma], true);
  90     }
  91 };
  92
  93 exports.default = list;
  94 module.exports = exports['default'];
  95 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