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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
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| var skipRegex = require('skip-regex') | ||
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| var S_SQ_STR = /'[^'\n\r\\]*(?:\\(?:\r\n?|[\S\s])[^'\n\r\\]*)*'/.source | ||
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| var S_R_SRC1 = [ | ||
| /\/\*[^*]*\*+(?:[^*\/][^*]*\*+)*\//.source, | ||
| '//.*', | ||
| S_SQ_STR, | ||
| S_SQ_STR.replace(/'/g, '"'), | ||
| '([/`])' | ||
| ].join('|') | ||
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| var S_R_SRC2 = `${S_R_SRC1.slice(0, -2)}{}])` | ||
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| /** | ||
| * Simple ES6 Template Literal parser, it searches the next back-quote that | ||
| * signals the end of the ES6TL or the `${` sequence that starts a JS expression, | ||
| * skipping any escaped character. | ||
| * | ||
| * @param {string} code - Whole code | ||
| * @param {number} start - The start position of the template | ||
| * @param {number} stack - To save nested ES6 TL count | ||
| * @returns {number} The end of the string (-1 if not found) | ||
| */ | ||
| function skipES6str (code, start, stack) { | ||
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| var re = /[`$\\]/g | ||
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| re.lastIndex = start | ||
| while (re.exec(code)) { | ||
| var end = re.lastIndex | ||
| var c = code[end - 1] | ||
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| if (c === '`') { | ||
| return end | ||
| } | ||
| if (c === '$' && code[end] === '{') { | ||
| stack.push('`', '}') | ||
| return end + 1 | ||
| } | ||
| re.lastIndex++ | ||
| } | ||
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| throw new Error('Unclosed ES6 template') | ||
| } | ||
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| /** | ||
| * Parses the code string searching the end of the expression. | ||
| * @param {string} code - Buffer to parse | ||
| * @param {number} [start=0] - Start position of the parsing | ||
| * @returns {Array} Expression's end (after the closing brace) or -1 if it is not an expr. | ||
| * @class | ||
| */ | ||
| function jsSplitter (code, start) { | ||
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| var re1 = new RegExp(S_R_SRC1, 'g') | ||
| var re2 | ||
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| var offset = start |= 0 | ||
| var result = [[]] | ||
| var stack = [] | ||
| var re = re1 | ||
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| var lastPos = re.lastIndex = offset | ||
| var str, ch, idx, end, match | ||
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| while ((match = re.exec(code))) { | ||
| idx = match.index | ||
| end = re.lastIndex | ||
| str = '' | ||
| ch = match[1] | ||
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| if (ch) { | ||
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| if (ch === '{') { | ||
| stack.push('}') | ||
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| } else if (ch === '}') { | ||
| if (stack.pop() !== ch) { | ||
| throw new Error("Unexpected '}'") | ||
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| } else if (stack[stack.length - 1] === '`') { | ||
| ch = stack.pop() | ||
| } | ||
|
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| } else if (ch === '/') { | ||
| end = skipRegex(code, idx) | ||
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| if (end > idx + 1) { | ||
| str = code.slice(idx, end) | ||
| } | ||
| } | ||
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| if (ch === '`') { | ||
| end = skipES6str(code, end, stack) | ||
| str = code.slice(idx, end) | ||
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| if (stack.length) { | ||
| re = re2 || (re2 = new RegExp(S_R_SRC2, 'g')) | ||
| } else { | ||
| re = re1 | ||
| } | ||
| } | ||
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| } else { | ||
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| str = match[0] | ||
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| if (str[0] === '/') { | ||
| str = str[1] === '*' ? ' ' : '' | ||
| code = code.slice(offset, idx) + str + code.slice(end) | ||
| end = idx + str.length | ||
| str = '' | ||
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| } else if (str.length === 2) { | ||
| str = '' | ||
| } | ||
| } | ||
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| if (str) { | ||
| result[0].push(code.slice(lastPos, idx)) | ||
| result.push(str) | ||
| lastPos = end | ||
| } | ||
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| re.lastIndex = end | ||
| } | ||
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| result[0].push(code.slice(lastPos)) | ||
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| return result | ||
| } | ||
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| module.exports = jsSplitter |
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