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parsing/compiling speedups

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This commit is contained in:
Alexis Sellier
2012-01-16 14:56:07 +01:00
parent e8ac71c5b0
commit e618119e03
1 changed files with 19 additions and 26 deletions
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45
lib/less/parser.js
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@@ -255,19 +255,18 @@ less.Parser = function Parser(env) {
var root, start, end, zone, line, lines, buff = [], c, error = null;
i = j = current = furthest = 0;
chunks = [];
input = str.replace(/\r\n/g, '\n');
// Split the input into chunks.
chunks = (function (chunks) {
var j = 0,
skip = /[^"'`\{\}\/\(\)]+/g,
skip = /[^"'`\{\}\/\(\)\\]+/g,
comment = /\/\*(?:[^*]|\*+[^\/*])*\*+\/|\/\/.*/g,
string = /"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'|`((?:[^`\\\r\n]|\\.)*)`/g,
level = 0,
match,
chunk = chunks[0],
inParam,
inString;
inParam;
for (var i = 0, c, cc; i < input.length; i++) {
skip.lastIndex = i;
@@ -278,9 +277,17 @@ less.Parser = function Parser(env) {
}
}
c = input.charAt(i);
comment.lastIndex = i;
comment.lastIndex = string.lastIndex = i;
if (!inString && !inParam && c === '/') {
if (match = string.exec(input)) {
if (match.index === i) {
i += match[0].length;
chunk.push(match[0]);
c = input.charAt(i);
}
}
if (!inParam && c === '/') {
cc = input.charAt(i + 1);
if (cc === '/' || cc === '*') {
if (match = comment.exec(input)) {
@@ -293,26 +300,12 @@ less.Parser = function Parser(env) {
}
}
if (c === '{' && !inString && !inParam) { level ++;
chunk.push(c);
} else if (c === '}' && !inString && !inParam) { level --;
chunk.push(c);
chunks[++j] = chunk = [];
} else if (c === '(' && !inString && !inParam) {
chunk.push(c);
inParam = true;
} else if (c === ')' && !inString && inParam) {
chunk.push(c);
inParam = false;
} else {
if (c === '"' || c === "'" || c === '`') {
if (! inString) {
inString = c;
} else {
inString = inString === c ? false : inString;
}
}
chunk.push(c);
switch (c) {
case '{': if (! inParam) { level ++; chunk.push(c); break }
case '}': if (! inParam) { level --; chunk.push(c); chunks[++j] = chunk = []; break }
case '(': if (! inParam) { inParam = true; chunk.push(c); break }
case ')': if ( inParam) { inParam = false; chunk.push(c); break }
default: chunk.push(c);
}
}
if (level > 0) {