63 lines
1.6 KiB
JavaScript
63 lines
1.6 KiB
JavaScript
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function split(value, separator, includeSeparator, openLevel, closeLevel, firstOnly) {
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var withRegex = typeof separator != 'string';
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var hasSeparator = withRegex ?
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separator.test(value) :
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value.indexOf(separator);
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if (!hasSeparator)
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return [value];
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openLevel = openLevel || '(';
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closeLevel = closeLevel || ')';
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if (value.indexOf(openLevel) == -1 && !includeSeparator && !firstOnly)
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return value.split(separator);
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var BACKSLASH = '\\';
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var isEscaped = false;
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var wasEscaped = false;
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var level = 0;
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var cursor = 0;
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var lastStart = 0;
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var len = value.length;
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var tokens = [];
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while (cursor < len) {
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isEscaped = value[cursor] == BACKSLASH;
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if (wasEscaped) {
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// no-op
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} else
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if (value[cursor] == openLevel) {
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level++;
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} else if (value[cursor] == closeLevel) {
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level--;
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}
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if (!wasEscaped && level === 0 && cursor > 0 && cursor + 1 < len && (withRegex ? separator.test(value[cursor]) : value[cursor] == separator)) {
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tokens.push(value.substring(lastStart, cursor + (includeSeparator ? 1 : 0)));
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lastStart = cursor + 1;
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if (firstOnly && tokens.length == 1) {
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break;
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}
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}
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wasEscaped = isEscaped;
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cursor++;
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}
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if (lastStart < cursor + 1) {
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var lastValue = value.substring(lastStart);
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var lastCharacter = lastValue[lastValue.length - 1];
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if (!includeSeparator && (withRegex ? separator.test(lastCharacter) : lastCharacter == separator))
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lastValue = lastValue.substring(0, lastValue.length - 1);
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tokens.push(lastValue);
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}
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return tokens;
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}
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module.exports = split;
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