| 1 | var toString = require('../lang/toString');
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| 2 |
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| 3 | /**
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| 4 | * Escape string into unicode sequences
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| 5 | */
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| 6 | function escapeUnicode(str, shouldEscapePrintable){
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| 7 | str = toString(str);
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| 8 | return str.replace(/[\s\S]/g, function(ch){
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| 9 | // skip printable ASCII chars if we should not escape them
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| 10 | if (!shouldEscapePrintable && (/[\x20-\x7E]/).test(ch)) {
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| 11 | return ch;
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| 12 | }
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| 13 | // we use "000" and slice(-4) for brevity, need to pad zeros,
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| 14 | // unicode escape always have 4 chars after "\u"
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| 15 | return '\\u'+ ('000'+ ch.charCodeAt(0).toString(16)).slice(-4);
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| 16 | });
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| 17 | }
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| 18 |
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| 19 | module.exports = escapeUnicode;
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| 20 |
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| 21 |
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