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44 lines
1.6 KiB
44 lines
1.6 KiB
/** Used to compose unicode character classes. */ |
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var rsAstralRange = '\\ud800-\\udfff', |
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rsComboMarksRange = '\\u0300-\\u036f', |
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reComboHalfMarksRange = '\\ufe20-\\ufe2f', |
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rsComboSymbolsRange = '\\u20d0-\\u20ff', |
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rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange, |
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rsVarRange = '\\ufe0e\\ufe0f'; |
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/** Used to compose unicode capture groups. */ |
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var rsAstral = '[' + rsAstralRange + ']', |
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rsCombo = '[' + rsComboRange + ']', |
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rsFitz = '\\ud83c[\\udffb-\\udfff]', |
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rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')', |
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rsNonAstral = '[^' + rsAstralRange + ']', |
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rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}', |
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rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]', |
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rsZWJ = '\\u200d'; |
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/** Used to compose unicode regexes. */ |
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var reOptMod = rsModifier + '?', |
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rsOptVar = '[' + rsVarRange + ']?', |
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rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*', |
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rsSeq = rsOptVar + reOptMod + rsOptJoin, |
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rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')'; |
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/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */ |
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var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g'); |
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/** |
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* Gets the size of a Unicode `string`. |
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* |
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* @private |
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* @param {string} string The string inspect. |
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* @returns {number} Returns the string size. |
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*/ |
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function unicodeSize(string) { |
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var result = reUnicode.lastIndex = 0; |
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while (reUnicode.test(string)) { |
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++result; |
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} |
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return result; |
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} |
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module.exports = unicodeSize;
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