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Updated and renamed CSSmin.php

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This commit is contained in:
Steve Clay
2012-09-30 19:39:30 -04:00
parent 884977fde2
commit 248aff9b72
1 changed files with 250 additions and 98 deletions
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348
min/lib/CSSMin.php → min/lib/CSSmin.php
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@@ -23,18 +23,32 @@
class CSSmin class CSSmin
{ {
const NL = '___YUICSSMIN_PRESERVED_NL___';
const TOKEN = '___YUICSSMIN_PRESERVED_TOKEN_';
const COMMENT = '___YUICSSMIN_PRESERVE_CANDIDATE_COMMENT_';
const CLASSCOLON = '___YUICSSMIN_PSEUDOCLASSCOLON___';
private $comments; private $comments;
private $preserved_tokens; private $preserved_tokens;
private $memory_limit;
private $max_execution_time;
private $pcre_backtrack_limit;
private $pcre_recursion_limit;
private $raise_php_limits;
/** /**
* @param bool $raisePhpSettingsLimits if true, raisePhpSettingLimits() will * @param bool|int $raise_php_limits
* be called. * If true, PHP settings will be raised if needed
*/ */
public function __construct($raisePhpSettingsLimits = true) public function __construct($raise_php_limits = TRUE)
{ {
if ($raisePhpSettingsLimits) { // Set suggested PHP limits
$this->raisePhpSettingLimits(); $this->memory_limit = 128 * 1048576; // 128MB in bytes
} $this->max_execution_time = 60; // 1 min
$this->pcre_backtrack_limit = 1000 * 1000;
$this->pcre_recursion_limit = 500 * 1000;
$this->raise_php_limits = (bool) $raise_php_limits;
} }
/** /**
@@ -43,8 +57,16 @@ class CSSmin
* @param int|bool $linebreak_pos * @param int|bool $linebreak_pos
* @return string * @return string
*/ */
public function run($css, $linebreak_pos = FALSE) public function run($css = '', $linebreak_pos = FALSE)
{ {
if (empty($css)) {
return '';
}
if ($this->raise_php_limits) {
$this->do_raise_php_limits();
}
$this->comments = array(); $this->comments = array();
$this->preserved_tokens = array(); $this->preserved_tokens = array();
@@ -59,20 +81,23 @@ class CSSmin
if ($end_index < 0) { if ($end_index < 0) {
$end_index = $length; $end_index = $length;
} }
$this->comments[] = $this->str_slice($css, $start_index + 2, $end_index); $comment_found = $this->str_slice($css, $start_index + 2, $end_index);
$css = $this->str_slice($css, 0, $start_index + 2) . '___YUICSSMIN_PRESERVE_CANDIDATE_COMMENT_' . (count($this->comments) - 1) . '___' . $this->str_slice($css, $end_index); $this->comments[] = $comment_found;
$start_index += 2; $comment_preserve_string = self::COMMENT . (count($this->comments) - 1) . '___';
$css = $this->str_slice($css, 0, $start_index + 2) . $comment_preserve_string . $this->str_slice($css, $end_index);
// Set correct start_index: Fixes issue #2528130
$start_index = $end_index + 2 + strlen($comment_preserve_string) - strlen($comment_found);
} }
// preserve strings so their content doesn't get accidentally minified // preserve strings so their content doesn't get accidentally minified
$css = preg_replace_callback('/(?:"(?:[^\\\\"]|\\\\.|\\\\)*")|'."(?:'(?:[^\\\\']|\\\\.|\\\\)*')/", array($this, 'callback_one'), $css); $css = preg_replace_callback('/(?:"(?:[^\\\\"]|\\\\.|\\\\)*")|'."(?:'(?:[^\\\\']|\\\\.|\\\\)*')/S", array($this, 'replace_string'), $css);
// Let's divide css code in chunks of 25.000 chars aprox. // Let's divide css code in chunks of 25.000 chars aprox.
// Reason: PHP's PCRE functions like preg_replace have a "backtrack limit" of 100.000 chars by default (php < 5.3.7) // Reason: PHP's PCRE functions like preg_replace have a "backtrack limit"
// so if we're dealing with really long strings and a (sub)pattern matches a number of chars greater than // of 100.000 chars by default (php < 5.3.7) so if we're dealing with really
// the backtrack limit number (i.e. /(.*)/s) PCRE functions may fail silently returning NULL and // long strings and a (sub)pattern matches a number of chars greater than
// $css would be empty. // the backtrack limit number (i.e. /(.*)/s) PCRE functions may fail silently
// returning NULL and $css would be empty.
$charset = ''; $charset = '';
$charset_regexp = '/@charset [^;]+;/i'; $charset_regexp = '/@charset [^;]+;/i';
$css_chunks = array(); $css_chunks = array();
@@ -110,45 +135,74 @@ class CSSmin
// Minify each chunk // Minify each chunk
for ($i = 0, $n = count($css_chunks); $i < $n; $i++) { for ($i = 0, $n = count($css_chunks); $i < $n; $i++) {
$css_chunks[$i] = $this->minify($css_chunks[$i], $linebreak_pos); $css_chunks[$i] = $this->minify($css_chunks[$i], $linebreak_pos);
// If there is a @charset in a css chunk... // Keep the first @charset at-rule found
if (empty($charset) && preg_match($charset_regexp, $css_chunks[$i], $matches)) { if (empty($charset) && preg_match($charset_regexp, $css_chunks[$i], $matches)) {
// delete all of them no matter the chunk
$css_chunks[$i] = preg_replace($charset_regexp, '', $css_chunks[$i]);
$charset = $matches[0]; $charset = $matches[0];
} }
// Delete all @charset at-rules
$css_chunks[$i] = preg_replace($charset_regexp, '', $css_chunks[$i]);
} }
// Update the first chunk and put the charset to the top of the file. // Update the first chunk and push the charset to the top of the file.
$css_chunks[0] = $charset . $css_chunks[0]; $css_chunks[0] = $charset . $css_chunks[0];
return implode('', $css_chunks); return implode('', $css_chunks);
} }
/** /**
* Get the minimum PHP setting values suggested for CSSmin * Sets the memory limit for this script
* @return array * @param int|string $limit
*/ */
public function getSuggestedPhpLimits() public function set_memory_limit($limit)
{ {
return array( $this->memory_limit = $this->normalize_int($limit);
'memory_limit' => '128M',
'pcre.backtrack_limit' => 1000 * 1000,
'pcre.recursion_limit' => 500 * 1000,
);
} }
/** /**
* Configure PHP to use at least the suggested minimum settings * Sets the maximum execution time for this script
* * @param int|string $seconds
* @todo Move this functionality to separate class.
*/ */
public function raisePhpSettingLimits() public function set_max_execution_time($seconds)
{ {
foreach ($this->getSuggestedPhpLimits() as $key => $val) { $this->max_execution_time = (int) $seconds;
$current = $this->normalizeInt(ini_get($key)); }
$suggested = $this->normalizeInt($val);
if ($current < $suggested) { /**
ini_set($key, $val); * Sets the PCRE backtrack limit for this script
* @param int $limit
*/
public function set_pcre_backtrack_limit($limit)
{
$this->pcre_backtrack_limit = (int) $limit;
}
/**
* Sets the PCRE recursion limit for this script
* @param int $limit
*/
public function set_pcre_recursion_limit($limit)
{
$this->pcre_recursion_limit = (int) $limit;
}
/**
* Try to configure PHP to use at least the suggested minimum settings
*/
private function do_raise_php_limits()
{
$php_limits = array(
'memory_limit' => $this->memory_limit,
'max_execution_time' => $this->max_execution_time,
'pcre.backtrack_limit' => $this->pcre_backtrack_limit,
'pcre.recursion_limit' => $this->pcre_recursion_limit
);
// If current settings are higher respect them.
foreach ($php_limits as $name => $suggested) {
$current = $this->normalize_int(ini_get($name));
// memory_limit exception: allow -1 for "no memory limit".
if ($current > -1 && ($suggested == -1 || $current < $suggested)) {
ini_set($name, $suggested);
} }
} }
} }
@@ -165,13 +219,17 @@ class CSSmin
for ($i = 0, $max = count($this->comments); $i < $max; $i++) { for ($i = 0, $max = count($this->comments); $i < $max; $i++) {
$token = $this->comments[$i]; $token = $this->comments[$i];
$placeholder = '/___YUICSSMIN_PRESERVE_CANDIDATE_COMMENT_' . $i . '___/'; $placeholder = '/' . self::COMMENT . $i . '___/';
// ! in the first position of the comment means preserve // ! in the first position of the comment means preserve
// so push to the preserved tokens keeping the ! // so push to the preserved tokens keeping the !
if (substr($token, 0, 1) === '!') { if (substr($token, 0, 1) === '!') {
$this->preserved_tokens[] = $token; $this->preserved_tokens[] = $token;
$css = preg_replace($placeholder, '___YUICSSMIN_PRESERVED_TOKEN_' . (count($this->preserved_tokens) - 1) . '___', $css, 1); $token_tring = self::TOKEN . (count($this->preserved_tokens) - 1) . '___';
$css = preg_replace($placeholder, $token_tring, $css, 1);
// Preserve new lines for /*! important comments
$css = preg_replace('/\s*[\n\r\f]+\s*(\/\*'. $token_tring .')/S', self::NL.'$1', $css);
$css = preg_replace('/('. $token_tring .'\*\/)\s*[\n\r\f]+\s*/S', '$1'.self::NL, $css);
continue; continue;
} }
@@ -179,10 +237,10 @@ class CSSmin
// shorten that to /*\*/ and the next one to /**/ // shorten that to /*\*/ and the next one to /**/
if (substr($token, (strlen($token) - 1), 1) === '\\') { if (substr($token, (strlen($token) - 1), 1) === '\\') {
$this->preserved_tokens[] = '\\'; $this->preserved_tokens[] = '\\';
$css = preg_replace($placeholder, '___YUICSSMIN_PRESERVED_TOKEN_' . (count($this->preserved_tokens) - 1) . '___', $css, 1); $css = preg_replace($placeholder, self::TOKEN . (count($this->preserved_tokens) - 1) . '___', $css, 1);
$i = $i + 1; // attn: advancing the loop $i = $i + 1; // attn: advancing the loop
$this->preserved_tokens[] = ''; $this->preserved_tokens[] = '';
$css = preg_replace('/___YUICSSMIN_PRESERVE_CANDIDATE_COMMENT_' . $i . '___/', '___YUICSSMIN_PRESERVED_TOKEN_' . (count($this->preserved_tokens) - 1) . '___', $css, 1); $css = preg_replace('/' . self::COMMENT . $i . '___/', self::TOKEN . (count($this->preserved_tokens) - 1) . '___', $css, 1);
continue; continue;
} }
@@ -193,7 +251,7 @@ class CSSmin
if ($start_index > 2) { if ($start_index > 2) {
if (substr($css, $start_index - 3, 1) === '>') { if (substr($css, $start_index - 3, 1) === '>') {
$this->preserved_tokens[] = ''; $this->preserved_tokens[] = '';
$css = preg_replace($placeholder, '___YUICSSMIN_PRESERVED_TOKEN_' . (count($this->preserved_tokens) - 1) . '___', $css, 1); $css = preg_replace($placeholder, self::TOKEN . (count($this->preserved_tokens) - 1) . '___', $css, 1);
} }
} }
} }
@@ -206,16 +264,36 @@ class CSSmin
// Normalize all whitespace strings to single spaces. Easier to work with that way. // Normalize all whitespace strings to single spaces. Easier to work with that way.
$css = preg_replace('/\s+/', ' ', $css); $css = preg_replace('/\s+/', ' ', $css);
// Shorten & preserve calculations calc(...) since spaces are important
$css = preg_replace_callback('/calc(\((?:[^\(\)]+|(?1))*\))/i', array($this, 'replace_calc'), $css);
// Replace positive sign from numbers preceded by : or a white-space before the leading space is removed
// +1.2em to 1.2em, +.8px to .8px, +2% to 2%
$css = preg_replace('/((?<!\\\\)\:|\s)\+(\.?\d+)/S', '$1$2', $css);
// Remove leading zeros from integer and float numbers preceded by : or a white-space
// 000.6 to .6, -0.8 to -.8, 0050 to 50, -01.05 to -1.05
$css = preg_replace('/((?<!\\\\)\:|\s)(\-?)0+(\.?\d+)/S', '$1$2$3', $css);
// Remove trailing zeros from float numbers preceded by : or a white-space
// -6.0100em to -6.01em, .0100 to .01, 1.200px to 1.2px
$css = preg_replace('/((?<!\\\\)\:|\s)(\-?)(\d?\.\d+?)0+([^\d])/S', '$1$2$3$4', $css);
// Remove trailing .0 -> -9.0 to -9
$css = preg_replace('/((?<!\\\\)\:|\s)(\-?\d+)\.0([^\d])/S', '$1$2$3', $css);
// Replace 0 length numbers with 0
$css = preg_replace('/((?<!\\\\)\:|\s)\-?\.?0+([^\d])/S', '${1}0$2', $css);
// Remove the spaces before the things that should not have spaces before them. // Remove the spaces before the things that should not have spaces before them.
// But, be careful not to turn "p :link {...}" into "p:link{...}" // But, be careful not to turn "p :link {...}" into "p:link{...}"
// Swap out any pseudo-class colons with the token, and then swap back. // Swap out any pseudo-class colons with the token, and then swap back.
$css = preg_replace_callback('/(?:^|\})(?:(?:[^\{\:])+\:)+(?:[^\{]*\{)/', array($this, 'callback_two'), $css); $css = preg_replace_callback('/(?:^|\})(?:(?:[^\{\:])+\:)+(?:[^\{]*\{)/', array($this, 'replace_colon'), $css);
$css = preg_replace('/\s+([\!\{\}\;\:\>\+\(\)\]\~\=,])/', '$1', $css);
$css = preg_replace('/\s+([\!\{\}\;\:\>\+\(\)\],])/', '$1', $css); $css = preg_replace('/' . self::CLASSCOLON . '/', ':', $css);
$css = preg_replace('/___YUICSSMIN_PSEUDOCLASSCOLON___/', ':', $css);
// retain space for special IE6 cases // retain space for special IE6 cases
$css = preg_replace('/\:first\-(line|letter)(\{|,)/', ':first-$1 $2', $css); $css = preg_replace('/\:first\-(line|letter)(\{|,)/i', ':first-$1 $2', $css);
// no space after the end of a preserved comment // no space after the end of a preserved comment
$css = preg_replace('/\*\/ /', '*/', $css); $css = preg_replace('/\*\/ /', '*/', $css);
@@ -225,41 +303,47 @@ class CSSmin
$css = preg_replace('/\band\(/i', 'and (', $css); $css = preg_replace('/\band\(/i', 'and (', $css);
// Remove the spaces after the things that should not have spaces after them. // Remove the spaces after the things that should not have spaces after them.
$css = preg_replace('/([\!\{\}\:;\>\+\(\[,])\s+/', '$1', $css); $css = preg_replace('/([\!\{\}\:;\>\+\(\[\~\=,])\s+/S', '$1', $css);
// remove unnecessary semicolons // remove unnecessary semicolons
$css = preg_replace('/;+\}/', '}', $css); $css = preg_replace('/;+\}/', '}', $css);
// Replace 0(px,em,%) with 0. // Fix for issue: #2528146
$css = preg_replace('/([\s\:])(0)(?:px|em|%|in|cm|mm|pc|pt|ex)/i', '$1$2', $css); // Restore semicolon if the last property is prefixed with a `*` (lte IE7 hack)
// to avoid issues on Symbian S60 3.x browsers.
$css = preg_replace('/(\*[a-z0-9\-]+\s*\:[^;\}]+)(\})/', '$1;$2', $css);
// Replace 0 0 0 0; with 0. // Replace 0 length units 0(px,em,%) with 0.
$css = preg_replace('/\:0 0 0 0(;|\})/', ':0$1', $css); $css = preg_replace('/((?<!\\\\)\:|\s)\-?0(?:em|ex|ch|rem|vw|vh|vm|vmin|cm|mm|in|px|pt|pc|%)/iS', '${1}0', $css);
$css = preg_replace('/\:0 0 0(;|\})/', ':0$1', $css);
$css = preg_replace('/\:0 0(;|\})/', ':0$1', $css); // Replace 0 0; or 0 0 0; or 0 0 0 0; with 0.
$css = preg_replace('/\:0(?: 0){1,3}(;|\})/', ':0$1', $css);
// Fix for issue: #2528142
// Replace text-shadow:0; with text-shadow:0 0 0;
$css = preg_replace('/(text-shadow\:0)(;|\})/ie', "strtolower('$1 0 0$2')", $css);
// Replace background-position:0; with background-position:0 0; // Replace background-position:0; with background-position:0 0;
// same for transform-origin // same for transform-origin
$css = preg_replace_callback('/(background\-position|transform\-origin|webkit\-transform\-origin|moz\-transform\-origin|o-transform\-origin|ms\-transform\-origin)\:0(;|\})/i', array($this, 'callback_three'), $css); $css = preg_replace('/(background\-position|(?:webkit|moz|o|ms|)\-?transform\-origin)\:0(;|\})/ieS', "strtolower('$1:0 0$2')", $css);
// Replace 0.6 to .6, but only when preceded by : or a white-space // Shorten colors from rgb(51,102,153) to #336699, rgb(100%,0%,0%) to #ff0000 (sRGB color space)
$css = preg_replace('/(\:|\s)0+\.(\d+)/', '$1.$2', $css); // Shorten colors from hsl(0, 100%, 50%) to #ff0000 (sRGB color space)
// Shorten colors from rgb(51,102,153) to #336699
// This makes it more likely that it'll get further compressed in the next step. // This makes it more likely that it'll get further compressed in the next step.
$css = preg_replace_callback('/rgb\s*\(\s*([0-9,\s]+)\s*\)/i', array($this, 'callback_four'), $css); $css = preg_replace_callback('/rgb\s*\(\s*([0-9,\s\-\.\%]+)\s*\)(.{1})/i', array($this, 'rgb_to_hex'), $css);
$css = preg_replace_callback('/hsl\s*\(\s*([0-9,\s\-\.\%]+)\s*\)(.{1})/i', array($this, 'hsl_to_hex'), $css);
// Shorten colors from #AABBCC to #ABC. // Shorten colors from #AABBCC to #ABC or short color name.
$css = $this->compress_hex_colors($css); $css = $this->compress_hex_colors($css);
// border: none -> border:0 // border: none to border:0, outline: none to outline:0
$css = preg_replace_callback('/(border|border\-top|border\-right|border\-bottom|border\-right|outline|background)\:none(;|\})/i', array($this, 'callback_five'), $css); $css = preg_replace('/(border\-?(?:top|right|bottom|left|)|outline)\:none(;|\})/ieS', "strtolower('$1:0$2')", $css);
// shorter opacity IE filter // shorter opacity IE filter
$css = preg_replace('/progid\:DXImageTransform\.Microsoft\.Alpha\(Opacity\=/i', 'alpha(opacity=', $css); $css = preg_replace('/progid\:DXImageTransform\.Microsoft\.Alpha\(Opacity\=/i', 'alpha(opacity=', $css);
// Remove empty rules. // Remove empty rules.
$css = preg_replace('/[^\};\{\/]+\{\}/', '', $css); $css = preg_replace('/[^\};\{\/]+\{\}/S', '', $css);
// Some source control tools don't like it when files containing lines longer // 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 // than, say 8000 characters, are checked in. The linebreak option is used in
@@ -280,15 +364,16 @@ class CSSmin
// See SF bug #1980989 // See SF bug #1980989
$css = preg_replace('/;;+/', ';', $css); $css = preg_replace('/;;+/', ';', $css);
// Restore new lines for /*! important comments
$css = preg_replace('/'. self::NL .'/', "\n", $css);
// restore preserved comments and strings // restore preserved comments and strings
for ($i = 0, $max = count($this->preserved_tokens); $i < $max; $i++) { for ($i = 0, $max = count($this->preserved_tokens); $i < $max; $i++) {
$css = preg_replace('/___YUICSSMIN_PRESERVED_TOKEN_' . $i . '___/', $this->preserved_tokens[$i], $css, 1); $css = preg_replace('/' . self::TOKEN . $i . '___/', $this->preserved_tokens[$i], $css, 1);
} }
// Trim the final string (for any leading or trailing white spaces) // Trim the final string (for any leading or trailing white spaces)
$css = preg_replace('/^\s+|\s+$/', '', $css); return trim($css);
return $css;
} }
/** /**
@@ -305,7 +390,7 @@ class CSSmin
$max_index = strlen($css) - 1; $max_index = strlen($css) - 1;
$append_index = $index = $last_index = $offset = 0; $append_index = $index = $last_index = $offset = 0;
$sb = array(); $sb = array();
$pattern = '/url\(\s*(["\']?)data\:/'; $pattern = '/url\(\s*(["\']?)data\:/i';
// Since we need to account for non-base64 data urls, we need to handle // Since we need to account for non-base64 data urls, we need to handle
// ' and ) being part of the data string. Hence switching to indexOf, // ' and ) being part of the data string. Hence switching to indexOf,
@@ -344,7 +429,7 @@ class CSSmin
$token = preg_replace('/\s+/', '', $token); $token = preg_replace('/\s+/', '', $token);
$this->preserved_tokens[] = $token; $this->preserved_tokens[] = $token;
$preserver = 'url(___YUICSSMIN_PRESERVED_TOKEN_' . (count($this->preserved_tokens) - 1) . '___)'; $preserver = 'url(' . self::TOKEN . (count($this->preserved_tokens) - 1) . '___)';
$sb[] = $preserver; $sb[] = $preserver;
$append_index = $end_index + 1; $append_index = $end_index + 1;
@@ -363,7 +448,7 @@ class CSSmin
} }
/** /**
* Utility method to compress hex color values of the form #AABBCC to #ABC. * Utility method to compress hex color values of the form #AABBCC to #ABC or short color name.
* *
* DOES NOT compress CSS ID selectors which match the above pattern (which would break things). * DOES NOT compress CSS ID selectors which match the above pattern (which would break things).
* e.g. #AddressForm { ... } * e.g. #AddressForm { ... }
@@ -380,9 +465,21 @@ class CSSmin
private function compress_hex_colors($css) private function compress_hex_colors($css)
{ {
// Look for hex colors inside { ... } (to avoid IDs) and which don't have a =, or a " in front of them (to avoid filters) // Look for hex colors inside { ... } (to avoid IDs) and which don't have a =, or a " in front of them (to avoid filters)
$pattern = '/(\=\s*?["\']?)?#([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])(\}|[^0-9a-f{][^{]*?\})/i'; $pattern = '/(\=\s*?["\']?)?#([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])([0-9a-f])(\}|[^0-9a-f{][^{]*?\})/iS';
$_index = $index = $last_index = $offset = 0; $_index = $index = $last_index = $offset = 0;
$sb = array(); $sb = array();
// See: http://ajaxmin.codeplex.com/wikipage?title=CSS%20Colors
$short_safe = array(
'#808080' => 'gray',
'#008000' => 'green',
'#800000' => 'maroon',
'#000080' => 'navy',
'#808000' => 'olive',
'#800080' => 'purple',
'#c0c0c0' => 'silver',
'#008080' => 'teal',
'#f00' => 'red'
);
while (preg_match($pattern, $css, $m, 0, $offset)) { while (preg_match($pattern, $css, $m, 0, $offset)) {
$index = $this->index_of($css, $m[0], $offset); $index = $this->index_of($css, $m[0], $offset);
@@ -399,11 +496,13 @@ class CSSmin
strtolower($m[4]) == strtolower($m[5]) && strtolower($m[4]) == strtolower($m[5]) &&
strtolower($m[6]) == strtolower($m[7])) { strtolower($m[6]) == strtolower($m[7])) {
// Compress. // Compress.
$sb[] = '#' . strtolower($m[3] . $m[5] . $m[7]); $hex = '#' . strtolower($m[3] . $m[5] . $m[7]);
} else { } else {
// Non compressible color, restore but lower case. // Non compressible color, restore but lower case.
$sb[] = '#' . strtolower($m[2] . $m[3] . $m[4] . $m[5] . $m[6] . $m[7]); $hex = '#' . strtolower($m[2] . $m[3] . $m[4] . $m[5] . $m[6] . $m[7]);
} }
// replace Hex colors to short safe color names
$sb[] = array_key_exists($hex, $short_safe) ? $short_safe[$hex] : $hex;
} }
$_index = $offset = $last_index - strlen($m[8]); $_index = $offset = $last_index - strlen($m[8]);
@@ -418,7 +517,7 @@ class CSSmin
* --------------------------------------------------------------------------------------------- * ---------------------------------------------------------------------------------------------
*/ */
private function callback_one($matches) private function replace_string($matches)
{ {
$match = $matches[0]; $match = $matches[0];
$quote = substr($match, 0, 1); $quote = substr($match, 0, 1);
@@ -427,9 +526,9 @@ class CSSmin
// maybe the string contains a comment-like substring? // maybe the string contains a comment-like substring?
// one, maybe more? put'em back then // one, maybe more? put'em back then
if (($pos = $this->index_of($match, '___YUICSSMIN_PRESERVE_CANDIDATE_COMMENT_')) >= 0) { if (($pos = $this->index_of($match, self::COMMENT)) >= 0) {
for ($i = 0, $max = count($this->comments); $i < $max; $i++) { for ($i = 0, $max = count($this->comments); $i < $max; $i++) {
$match = preg_replace('/___YUICSSMIN_PRESERVE_CANDIDATE_COMMENT_' . $i . '___/', $this->comments[$i], $match, 1); $match = preg_replace('/' . self::COMMENT . $i . '___/', $this->comments[$i], $match, 1);
} }
} }
@@ -437,40 +536,94 @@ class CSSmin
$match = preg_replace('/progid\:DXImageTransform\.Microsoft\.Alpha\(Opacity\=/i', 'alpha(opacity=', $match); $match = preg_replace('/progid\:DXImageTransform\.Microsoft\.Alpha\(Opacity\=/i', 'alpha(opacity=', $match);
$this->preserved_tokens[] = $match; $this->preserved_tokens[] = $match;
return $quote . '___YUICSSMIN_PRESERVED_TOKEN_' . (count($this->preserved_tokens) - 1) . '___' . $quote; return $quote . self::TOKEN . (count($this->preserved_tokens) - 1) . '___' . $quote;
} }
private function callback_two($matches) private function replace_colon($matches)
{ {
return preg_replace('/\:/', '___YUICSSMIN_PSEUDOCLASSCOLON___', $matches[0]); return preg_replace('/\:/', self::CLASSCOLON, $matches[0]);
} }
private function callback_three($matches) private function replace_calc($matches)
{ {
return strtolower($matches[1]) . ':0 0' . $matches[2]; $this->preserved_tokens[] = preg_replace('/\s?([\*\/\(\),])\s?/', '$1', $matches[0]);
return self::TOKEN . (count($this->preserved_tokens) - 1) . '___';
} }
private function callback_four($matches) private function rgb_to_hex($matches)
{ {
$rgbcolors = explode(',', $matches[1]); // Support for percentage values rgb(100%, 0%, 45%);
for ($i = 0; $i < count($rgbcolors); $i++) { if ($this->index_of($matches[1], '%') >= 0){
$rgbcolors[$i] = base_convert(strval(intval($rgbcolors[$i], 10)), 10, 16); $rgbcolors = explode(',', str_replace('%', '', $matches[1]));
if (strlen($rgbcolors[$i]) === 1) { for ($i = 0; $i < count($rgbcolors); $i++) {
$rgbcolors[$i] = '0' . $rgbcolors[$i]; $rgbcolors[$i] = $this->round_number(floatval($rgbcolors[$i]) * 2.55);
} }
} else {
$rgbcolors = explode(',', $matches[1]);
} }
return '#' . implode('', $rgbcolors);
// Values outside the sRGB color space should be clipped (0-255)
for ($i = 0; $i < count($rgbcolors); $i++) {
$rgbcolors[$i] = $this->clamp_number(intval($rgbcolors[$i], 10), 0, 255);
$rgbcolors[$i] = sprintf("%02x", $rgbcolors[$i]);
}
// Fix for issue #2528093
if (!preg_match('/[\s\,\);\}]/', $matches[2])){
$matches[2] = ' ' . $matches[2];
}
return '#' . implode('', $rgbcolors) . $matches[2];
} }
private function callback_five($matches) private function hsl_to_hex($matches)
{ {
return strtolower($matches[1]) . ':0' . $matches[2]; $values = explode(',', str_replace('%', '', $matches[1]));
$h = floatval($values[0]);
$s = floatval($values[1]);
$l = floatval($values[2]);
// Wrap and clamp, then fraction!
$h = ((($h % 360) + 360) % 360) / 360;
$s = $this->clamp_number($s, 0, 100) / 100;
$l = $this->clamp_number($l, 0, 100) / 100;
if ($s == 0) {
$r = $g = $b = $this->round_number(255 * $l);
} else {
$v2 = $l < 0.5 ? $l * (1 + $s) : ($l + $s) - ($s * $l);
$v1 = (2 * $l) - $v2;
$r = $this->round_number(255 * $this->hue_to_rgb($v1, $v2, $h + (1/3)));
$g = $this->round_number(255 * $this->hue_to_rgb($v1, $v2, $h));
$b = $this->round_number(255 * $this->hue_to_rgb($v1, $v2, $h - (1/3)));
}
return $this->rgb_to_hex(array('', $r.','.$g.','.$b, $matches[2]));
} }
/* HELPERS /* HELPERS
* --------------------------------------------------------------------------------------------- * ---------------------------------------------------------------------------------------------
*/ */
private function hue_to_rgb($v1, $v2, $vh)
{
$vh = $vh < 0 ? $vh + 1 : ($vh > 1 ? $vh - 1 : $vh);
if ($vh * 6 < 1) return $v1 + ($v2 - $v1) * 6 * $vh;
if ($vh * 2 < 1) return $v2;
if ($vh * 3 < 2) return $v1 + ($v2 - $v1) * ((2/3) - $vh) * 6;
return $v1;
}
private function round_number($n)
{
return intval(floor(floatval($n) + 0.5), 10);
}
private function clamp_number($n, $min, $max)
{
return min(max($n, $min), $max);
}
/** /**
* PHP port of Javascript's "indexOf" function for strings only * PHP port of Javascript's "indexOf" function for strings only
* Author: Tubal Martin http://blog.margenn.com * Author: Tubal Martin http://blog.margenn.com
@@ -519,7 +672,6 @@ class CSSmin
return ($substring === FALSE) ? '' : $substring; return ($substring === FALSE) ? '' : $substring;
} }
/** /**
* PHP port of Javascript's "slice" function for strings only * PHP port of Javascript's "slice" function for strings only
* Author: Tubal Martin http://blog.margenn.com * Author: Tubal Martin http://blog.margenn.com
@@ -557,20 +709,20 @@ class CSSmin
} }
/** /**
* Convert strings like "64M" to int values * Convert strings like "64M" or "30" to int values
* @param mixed $size * @param mixed $size
* @return int * @return int
*/ */
private function normalizeInt($size) private function normalize_int($size)
{ {
if (is_string($size)) { if (is_string($size)) {
switch (substr($size, -1)) { switch (substr($size, -1)) {
case 'M': case 'm': return (int)$size * 1048576; case 'M': case 'm': return $size * 1048576;
case 'K': case 'k': return (int)$size * 1024; case 'K': case 'k': return $size * 1024;
case 'G': case 'g': return (int)$size * 1073741824; case 'G': case 'g': return $size * 1073741824;
default: return (int) $size;
} }
} }
return (int) $size; return (int) $size;
} }
} }