diff options
Diffstat (limited to 'inc/contrib/minify/Minify/YUI/CssCompressor.php')
| -rwxr-xr-x | inc/contrib/minify/Minify/YUI/CssCompressor.php | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/inc/contrib/minify/Minify/YUI/CssCompressor.php b/inc/contrib/minify/Minify/YUI/CssCompressor.php new file mode 100755 index 00000000..ae3443d4 --- /dev/null +++ b/inc/contrib/minify/Minify/YUI/CssCompressor.php @@ -0,0 +1,171 @@ +<?php +/** + * Class Minify_YUI_CssCompressor + * @package Minify + * + * YUI Compressor + * Author: Julien Lecomte - http://www.julienlecomte.net/ + * Author: Isaac Schlueter - http://foohack.com/ + * Author: Stoyan Stefanov - http://phpied.com/ + * Author: Steve Clay - http://www.mrclay.org/ (PHP port) + * 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. + */ + +/** + * Compress CSS (incomplete DO NOT USE) + * + * @see https://github.com/yui/yuicompressor/blob/master/src/com/yahoo/platform/yui/compressor/CssCompressor.java + * + * @package Minify + */ +class Minify_YUI_CssCompressor { + + /** + * Minify a CSS string + * + * @param string $css + * + * @return string + */ + public function compress($css, $linebreakpos = 0) + { + $css = str_replace("\r\n", "\n", $css); + + /** + * @todo comment removal + * @todo re-port from newer Java version + */ + + // Normalize all whitespace strings to single spaces. Easier to work with that way. + $css = preg_replace('@\s+@', ' ', $css); + + // Make a pseudo class for the Box Model Hack + $css = preg_replace("@\"\\\\\"}\\\\\"\"@", "___PSEUDOCLASSBMH___", $css); + + // 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. + $css = preg_replace_callback("@(^|\\})(([^\\{:])+:)+([^\\{]*\\{)@", array($this, '_removeSpacesCB'), $css); + + $css = preg_replace("@\\s+([!{};:>+\\(\\)\\],])@", "$1", $css); + $css = str_replace("___PSEUDOCLASSCOLON___", ":", $css); + + // Remove the spaces after the things that should not have spaces after them. + $css = preg_replace("@([!{}:;>+\\(\\[,])\\s+@", "$1", $css); + + // Add the semicolon where it's missing. + $css = preg_replace("@([^;\\}])}@", "$1;}", $css); + + // Replace 0(px,em,%) with 0. + $css = preg_replace("@([\\s:])(0)(px|em|%|in|cm|mm|pc|pt|ex)@", "$1$2", $css); + + // Replace 0 0 0 0; with 0. + $css = str_replace(":0 0 0 0;", ":0;", $css); + $css = str_replace(":0 0 0;", ":0;", $css); + $css = str_replace(":0 0;", ":0;", $css); + + // Replace background-position:0; with background-position:0 0; + $css = str_replace("background-position:0;", "background-position:0 0;", $css); + + // Replace 0.6 to .6, but only when preceded by : or a white-space + $css = preg_replace("@(:|\\s)0+\\.(\\d+)@", "$1.$2", $css); + + // Shorten colors from rgb(51,102,153) to #336699 + // This makes it more likely that it'll get further compressed in the next step. + $css = preg_replace_callback("@rgb\\s*\\(\\s*([0-9,\\s]+)\\s*\\)@", array($this, '_shortenRgbCB'), $css); + + // 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. + $css = preg_replace_callback("@([^\"'=\\s])(\\s*)#([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])@", array($this, '_shortenHexCB'), $css); + + // Remove empty rules. + $css = preg_replace("@[^\\}]+\\{;\\}@", "", $css); + + $linebreakpos = isset($this->_options['linebreakpos']) + ? $this->_options['linebreakpos'] + : 0; + + if ($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. + $i = 0; + $linestartpos = 0; + $sb = $css; + + // make sure strlen returns byte count + $mbIntEnc = null; + if (function_exists('mb_strlen') && ((int)ini_get('mbstring.func_overload') & 2)) { + $mbIntEnc = mb_internal_encoding(); + mb_internal_encoding('8bit'); + } + $sbLength = strlen($css); + while ($i < $sbLength) { + $c = $sb[$i++]; + if ($c === '}' && $i - $linestartpos > $linebreakpos) { + $sb = substr_replace($sb, "\n", $i, 0); + $sbLength++; + $linestartpos = $i; + } + } + $css = $sb; + + // undo potential mb_encoding change + if ($mbIntEnc !== null) { + mb_internal_encoding($mbIntEnc); + } + } + + // Replace the pseudo class for the Box Model Hack + $css = str_replace("___PSEUDOCLASSBMH___", "\"\\\\\"}\\\\\"\"", $css); + + // Replace multiple semi-colons in a row by a single one + // See SF bug #1980989 + $css = preg_replace("@;;+@", ";", $css); + + // prevent triggering IE6 bug: http://www.crankygeek.com/ie6pebug/ + $css = preg_replace('/:first-l(etter|ine)\\{/', ':first-l$1 {', $css); + + // Trim the final string (for any leading or trailing white spaces) + $css = trim($css); + + return $css; + } + + protected function _removeSpacesCB($m) + { + return str_replace(':', '___PSEUDOCLASSCOLON___', $m[0]); + } + + protected function _shortenRgbCB($m) + { + $rgbcolors = explode(',', $m[1]); + $hexcolor = '#'; + for ($i = 0; $i < count($rgbcolors); $i++) { + $val = round($rgbcolors[$i]); + if ($val < 16) { + $hexcolor .= '0'; + } + $hexcolor .= dechex($val); + } + return $hexcolor; + } + + protected function _shortenHexCB($m) + { + // Test for AABBCC pattern + if ((strtolower($m[3])===strtolower($m[4])) && + (strtolower($m[5])===strtolower($m[6])) && + (strtolower($m[7])===strtolower($m[8]))) { + return $m[1] . $m[2] . "#" . $m[3] . $m[5] . $m[7]; + } else { + return $m[0]; + } + } +}
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