/**
* cssmin.js
* Author: Stoyan Stefanov - http://phpied.com/
* This is a JavaScript port of the CSS minification tool
* distributed with YUICompressor, itself a port
* of the cssmin utility by Isaac Schlueter - http://foohack.com/
* Permission is hereby granted to use the JavaScript version under the same
* conditions as the YUICompressor (original YUICompressor note below).
*/
/*
* YUI Compressor
* Author: Julien Lecomte - http://www.julienlecomte.net/
* Copyright (c) 2009 Yahoo! Inc. All rights reserved.
* The copyrights embodied in the content of this file are licensed
* by Yahoo! Inc. under the BSD (revised) open source license.
*/
( function() {
var cssmin = function (css, linebreakpos) {
var startIndex = 0,
endIndex = 0,
iemac = false,
preserve = false,
i = 0, max = 0,
preservedTokens = [],
token = '';
// preserve strings so their content doesn't get accidentally minified
css = css.replace(/("([^\\"]|\\.|\\)*")|('([^\\']|\\.|\\)*')/g, function(match) {
var quote = match[0];
preservedTokens.push(match.slice(1, -1));
return quote + "___YUICSSMIN_PRESERVED_TOKEN_" + (preservedTokens.length - 1) + "___" + quote;
});
// Remove all comment blocks...
while ((startIndex = css.indexOf("/*", startIndex)) >= 0) {
preserve = css.length > startIndex + 2 && css[startIndex + 2] === '!';
endIndex = css.indexOf("*/", startIndex + 2);
if (endIndex < 0) {
if (!preserve) {
css = css.slice(0, startIndex);
}
} else if (endIndex >= startIndex + 2) {
if (css[endIndex - 1] === '\\') {
// Looks like a comment to hide rules from IE Mac.
// Leave this comment, and the following one, but shorten them
css = css.slice(0, startIndex) + "/*\\*/" + css.slice(endIndex + 2);
startIndex += 5;
iemac = true;
} else if (iemac && !preserve) {
css = css.slice(0, startIndex) + "/**/" + css.slice(endIndex + 2);
startIndex += 4;
iemac = false;
} else if (!preserve) {
css = css.slice(0, startIndex) + css.slice(endIndex + 2);
} else {
// preserve
token = css.slice(startIndex+3, endIndex); // 3 is "/*!".length
preservedTokens.push(token);
css = css.slice(0, startIndex+2) + "___YUICSSMIN_PRESERVED_TOKEN_" + (preservedTokens.length - 1) + "___" + css.slice(endIndex);
if (iemac) iemac = false;
startIndex += 2;
}
}
}
// Normalize all whitespace strings to single spaces. Easier to work with that way.
css = css.replace(/\s+/g, " ");
// Remove the spaces before the things that should not have spaces before them.
// But, be careful not to turn "p :link {...}" into "p:link{...}"
// Swap out any pseudo-class colons with the token, and then swap back.
css = css.replace(/(^|\})(([^\{:])+:)+([^\{]*\{)/g, function(m) {
return m.replace(":", "___YUICSSMIN_PSEUDOCLASSCOLON___");
});
css = css.replace(/\s+([!{};:>+\(\)\],])/g, '$1');
css = css.replace(/___YUICSSMIN_PSEUDOCLASSCOLON___/g, ":");
// retain space for special IE6 cases
css = css.replace(/:first-(line|letter)({|,)/g, ":first-$1 $2");
// no space after the end of a preserved comment
css = css.replace(/\*\/ /g, '*/');
// If there is a @charset, then only allow one, and push to the top of the file.
css = css.replace(/^(.*)(@charset "[^"]*";)/gi, '$2$1');
css = css.replace(/^(\s*@charset [^;]+;\s*)+/gi, '$1');
// Put the space back in some cases, to support stuff like
// @media screen and (-webkit-min-device-pixel-ratio:0){
css = css.replace(/\band\(/gi, "and (");
// Remove the spaces after the things that should not have spaces after them.
css = css.replace(/([!{}:;>+\(\[,])\s+/g, '$1');
// remove unnecessary semicolons
css = css.replace(/;+}/g, "}");
// Replace 0(px,em,%) with 0.
css = css.replace(/([\s:])(0)(px|em|%|in|cm|mm|pc|pt|ex)/gi, "$1$2");
// Replace 0 0 0 0; with 0.
css = css.replace(/:0 0 0 0;/g, ":0;");
css = css.replace(/:0 0 0;/g, ":0;");
css = css.replace(/:0 0;/g, ":0;");
// Replace background-position:0; with background-position:0 0;
css = css.replace(/background-position:0;/gi, "background-position:0 0;");
// Replace 0.6 to .6, but only when preceded by : or a white-space
css = css.replace(/(:|\s)0+\.(\d+)/g, "$1.$2");
// Shorten colors from rgb(51,102,153) to #336699
// This makes it more likely that it'll get further compressed in the next step.
css = css.replace(/rgb\s*\(\s*([0-9,\s]+)\s*\)/gi, function(){
var rgbcolors = arguments[1].split(',');
for (var i = 0; i < rgbcolors.length; i++) {
rgbcolors[i] = parseInt(rgbcolors[i], 10).toString(16);
if (rgbcolors[i].length === 1) {
rgbcolors[i] = '0' + rgbcolors[i];
}
}
return '#' + rgbcolors.join('');
});
// Shorten colors from #AABBCC to #ABC. Note that we want to make sure
// the color is not preceded by either ", " or =. Indeed, the property
// filter: chroma(color="#FFFFFF");
// would become
// filter: chroma(color="#FFF");
// which makes the filter break in IE.
css = css.replace(/([^"'=\s])(\s*)#([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])/gi, function(){
var group = arguments;
if (
group[3].toLowerCase() === group[4].toLowerCase() &&
group[5].toLowerCase() === group[6].toLowerCase() &&
group[7].toLowerCase() === group[8].toLowerCase()
) {
return (group[1] + group[2] + '#' + group[3] + group[5] + group[7]).toLowerCase();
} else {
return group[0].toLowerCase();
}
});
// Remove empty rules.
css = css.replace(/[^\};\{\/]+\{\}/g, "");
if (linebreakpos >= 0) {
// Some source control tools don't like it when files containing lines longer
// than, say 8000 characters, are checked in. The linebreak option is used in
// that case to split long lines after a specific column.
startIndex = 0;
i = 0;
while (i < css.length) {
if (css[i++] === '}' && i - startIndex > linebreakpos) {
css = css.slice(0, i) + '\n' + css.slice(i);
startIndex = i;
}
}
}
// Replace multiple semi-colons in a row by a single one
// See SF bug #1980989
css = css.replace(/;;+/g, ";");
// restore preserved comments and strings
for(i = 0, max = preservedTokens.length; i < max; i++) {
css = css.replace("___YUICSSMIN_PRESERVED_TOKEN_" + i + "___", preservedTokens[i]);
}
// Trim the final string (for any leading or trailing white spaces)
css = css.replace(/^\s+|\s+$/g, "");
return css;
};
//Node.js
if ( typeof module === "object" && typeof exports === "object" && module.exports === exports ) {
exports.cssmin = cssmin;
}
//web browser
else if ( typeof window === "object" ) {
if ( typeof YAHOO !== "object" ) {
YAHOO = { compressor: { cssmin:cssmin } };
}
else if ( typeof YAHOO.compressor !== "object" ) {
YAHOO.compressor = { cssmin:cssmin };
}
else {
YAHOO.compressor.cssmin = cssmin;
}
}
})();