From 76e2669180deac0522a22b0dfbd33ae7716e2fc5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Elan=20Ruusam=C3=A4e?= Date: Sun, 30 Nov 2014 17:30:57 +0200 Subject: [PATCH] drop bundled CSSmin, use tubalmartin/cssmin from packagist instead --- min/lib/CSSmin.php | 775 --------------------------------------------- 1 file changed, 775 deletions(-) delete mode 100644 min/lib/CSSmin.php diff --git a/min/lib/CSSmin.php b/min/lib/CSSmin.php deleted file mode 100644 index e85f23e..0000000 --- a/min/lib/CSSmin.php +++ /dev/null @@ -1,775 +0,0 @@ -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; - } - - /** - * Minify a string of CSS - * @param string $css - * @param int|bool $linebreak_pos - * @return string - */ - public function run($css = '', $linebreak_pos = FALSE) - { - if (empty($css)) { - return ''; - } - - if ($this->raise_php_limits) { - $this->do_raise_php_limits(); - } - - $this->comments = array(); - $this->preserved_tokens = array(); - - $start_index = 0; - $length = strlen($css); - - $css = $this->extract_data_urls($css); - - // collect all comment blocks... - while (($start_index = $this->index_of($css, '/*', $start_index)) >= 0) { - $end_index = $this->index_of($css, '*/', $start_index + 2); - if ($end_index < 0) { - $end_index = $length; - } - $comment_found = $this->str_slice($css, $start_index + 2, $end_index); - $this->comments[] = $comment_found; - $comment_preserve_string = self::COMMENT . (count($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 - $css = preg_replace_callback('/(?:"(?:[^\\\\"]|\\\\.|\\\\)*")|'."(?:'(?:[^\\\\']|\\\\.|\\\\)*')/S", array($this, 'replace_string'), $css); - - // Let's divide css code in chunks of 5.000 chars aprox. - // Reason: PHP's PCRE functions like preg_replace have a "backtrack limit" - // of 100.000 chars by default (php < 5.3.7) so if we're dealing with really - // long strings and a (sub)pattern matches a number of chars greater than - // the backtrack limit number (i.e. /(.*)/s) PCRE functions may fail silently - // returning NULL and $css would be empty. - $charset = ''; - $charset_regexp = '/(@charset)( [^;]+;)/i'; - $css_chunks = array(); - $css_chunk_length = 5000; // aprox size, not exact - $start_index = 0; - $i = $css_chunk_length; // save initial iterations - $l = strlen($css); - - - // if the number of characters is 25000 or less, do not chunk - if ($l <= $css_chunk_length) { - $css_chunks[] = $css; - } else { - // chunk css code securely - while ($i < $l) { - $i += 50; // save iterations - if ($l - $start_index <= $css_chunk_length || $i >= $l) { - $css_chunks[] = $this->str_slice($css, $start_index); - break; - } - if ($css[$i - 1] === '}' && $i - $start_index > $css_chunk_length) { - // If there are two ending curly braces }} separated or not by spaces, - // join them in the same chunk (i.e. @media blocks) - $next_chunk = substr($css, $i); - if (preg_match('/^\s*\}/', $next_chunk)) { - $i = $i + $this->index_of($next_chunk, '}') + 1; - } - - $css_chunks[] = $this->str_slice($css, $start_index, $i); - $start_index = $i; - } - } - } - - // Minify each chunk - for ($i = 0, $n = count($css_chunks); $i < $n; $i++) { - $css_chunks[$i] = $this->minify($css_chunks[$i], $linebreak_pos); - // Keep the first @charset at-rule found - if (empty($charset) && preg_match($charset_regexp, $css_chunks[$i], $matches)) { - $charset = strtolower($matches[1]) . $matches[2]; - } - // Delete all @charset at-rules - $css_chunks[$i] = preg_replace($charset_regexp, '', $css_chunks[$i]); - } - - // Update the first chunk and push the charset to the top of the file. - $css_chunks[0] = $charset . $css_chunks[0]; - - return implode('', $css_chunks); - } - - /** - * Sets the memory limit for this script - * @param int|string $limit - */ - public function set_memory_limit($limit) - { - $this->memory_limit = $this->normalize_int($limit); - } - - /** - * Sets the maximum execution time for this script - * @param int|string $seconds - */ - public function set_max_execution_time($seconds) - { - $this->max_execution_time = (int) $seconds; - } - - /** - * 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); - } - } - } - - /** - * Does bulk of the minification - * @param string $css - * @param int|bool $linebreak_pos - * @return string - */ - private function minify($css, $linebreak_pos) - { - // strings are safe, now wrestle the comments - for ($i = 0, $max = count($this->comments); $i < $max; $i++) { - - $token = $this->comments[$i]; - $placeholder = '/' . self::COMMENT . $i . '___/'; - - // ! in the first position of the comment means preserve - // so push to the preserved tokens keeping the ! - if (substr($token, 0, 1) === '!') { - $this->preserved_tokens[] = $token; - $token_tring = self::TOKEN . (count($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*/', '$1'.self::NL, $css); - continue; - } - - // \ in the last position looks like hack for Mac/IE5 - // shorten that to /*\*/ and the next one to /**/ - if (substr($token, (strlen($token) - 1), 1) === '\\') { - $this->preserved_tokens[] = '\\'; - $css = preg_replace($placeholder, self::TOKEN . (count($this->preserved_tokens) - 1) . '___', $css, 1); - $i = $i + 1; // attn: advancing the loop - $this->preserved_tokens[] = ''; - $css = preg_replace('/' . self::COMMENT . $i . '___/', self::TOKEN . (count($this->preserved_tokens) - 1) . '___', $css, 1); - continue; - } - - // keep empty comments after child selectors (IE7 hack) - // e.g. html >/**/ body - if (strlen($token) === 0) { - $start_index = $this->index_of($css, $this->str_slice($placeholder, 1, -1)); - if ($start_index > 2) { - if (substr($css, $start_index - 3, 1) === '>') { - $this->preserved_tokens[] = ''; - $css = preg_replace($placeholder, self::TOKEN . (count($this->preserved_tokens) - 1) . '___', $css, 1); - } - } - } - - // in all other cases kill the comment - $css = preg_replace('/\/\*' . $this->str_slice($placeholder, 1, -1) . '\*\//', '', $css, 1); - } - - - // Normalize all whitespace strings to single spaces. Easier to work with that way. - $css = preg_replace('/\s+/', ' ', $css); - - // Fix IE7 issue on matrix filters which browser accept whitespaces between Matrix parameters - $css = preg_replace_callback('/\s*filter\:\s*progid:DXImageTransform\.Microsoft\.Matrix\(([^\)]+)\)/', array($this, 'preserve_old_IE_specific_matrix_definition'), $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('/((? -9.0 to -9 - $css = preg_replace('/((?\+\(\)\]\~\=,])/', '$1', $css); - - // Restore spaces for !important - $css = preg_replace('/\!important/i', ' !important', $css); - - // bring back the colon - $css = preg_replace('/' . self::CLASSCOLON . '/', ':', $css); - - // retain space for special IE6 cases - $css = preg_replace_callback('/\:first\-(line|letter)(\{|,)/i', array($this, 'lowercase_pseudo_first'), $css); - - // no space after the end of a preserved comment - $css = preg_replace('/\*\/ /', '*/', $css); - - // lowercase some popular @directives - $css = preg_replace_callback('/@(font-face|import|(?:-(?:atsc|khtml|moz|ms|o|wap|webkit)-)?keyframe|media|page|namespace)/i', array($this, 'lowercase_directives'), $css); - - // lowercase some more common pseudo-elements - $css = preg_replace_callback('/:(active|after|before|checked|disabled|empty|enabled|first-(?:child|of-type)|focus|hover|last-(?:child|of-type)|link|only-(?:child|of-type)|root|:selection|target|visited)/i', array($this, 'lowercase_pseudo_elements'), $css); - - // lowercase some more common functions - $css = preg_replace_callback('/:(lang|not|nth-child|nth-last-child|nth-last-of-type|nth-of-type|(?:-(?:moz|webkit)-)?any)\(/i', array($this, 'lowercase_common_functions'), $css); - - // lower case some common function that can be values - // NOTE: rgb() isn't useful as we replace with #hex later, as well as and() is already done for us - $css = preg_replace_callback('/([:,\( ]\s*)(attr|color-stop|from|rgba|to|url|(?:-(?:atsc|khtml|moz|ms|o|wap|webkit)-)?(?:calc|max|min|(?:repeating-)?(?:linear|radial)-gradient)|-webkit-gradient)/iS', array($this, 'lowercase_common_functions_values'), $css); - - // Put the space back in some cases, to support stuff like - // @media screen and (-webkit-min-device-pixel-ratio:0){ - $css = preg_replace('/\band\(/i', 'and (', $css); - - // Remove the spaces after the things that should not have spaces after them. - $css = preg_replace('/([\!\{\}\:;\>\+\(\[\~\=,])\s+/S', '$1', $css); - - // remove unnecessary semicolons - $css = preg_replace('/;+\}/', '}', $css); - - // Fix for issue: #2528146 - // 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 length units 0(px,em,%) with 0. - $css = preg_replace('/(^|[^0-9])(?:0?\.)?0(?:em|ex|ch|rem|vw|vh|vm|vmin|cm|mm|in|px|pt|pc|%|deg|g?rad|m?s|k?hz)/iS', '${1}0', $css); - - // 0% step in a keyframe? restore the % unit - $css = preg_replace_callback('/(@[a-z\-]*?keyframes[^\{]*?\{)(.*?\}\s*\})/iS', array($this, 'replace_keyframe_zero'), $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)(;|\}| \!)/i', '$1 0 0$2', $css); - - // Replace background-position:0; with background-position:0 0; - // same for transform-origin - // Changing -webkit-mask-position: 0 0 to just a single 0 will result in the second parameter defaulting to 50% (center) - $css = preg_replace('/(background\-position|webkit-mask-position|(?:webkit|moz|o|ms|)\-?transform\-origin)\:0(;|\}| \!)/iS', '$1:0 0$2', $css); - - // Shorten colors from rgb(51,102,153) to #336699, rgb(100%,0%,0%) to #ff0000 (sRGB color space) - // Shorten colors from hsl(0, 100%, 50%) to #ff0000 (sRGB color space) - // This makes it more likely that it'll get further compressed in the next step. - $css = preg_replace_callback('/rgb\s*\(\s*([0-9,\s\-\.\%]+)\s*\)(.{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 or short color name. - $css = $this->compress_hex_colors($css); - - // border: none to border:0, outline: none to outline:0 - $css = preg_replace('/(border\-?(?:top|right|bottom|left|)|outline)\:none(;|\}| \!)/iS', '$1:0$2', $css); - - // shorter opacity IE filter - $css = preg_replace('/progid\:DXImageTransform\.Microsoft\.Alpha\(Opacity\=/i', 'alpha(opacity=', $css); - - // Find a fraction that is used for Opera's -o-device-pixel-ratio query - // Add token to add the "\" back in later - $css = preg_replace('/\(([a-z\-]+):([0-9]+)\/([0-9]+)\)/i', '($1:$2'. self::QUERY_FRACTION .'$3)', $css); - - // Remove empty rules. - $css = preg_replace('/[^\};\{\/]+\{\}/S', '', $css); - - // Add "/" back to fix Opera -o-device-pixel-ratio query - $css = preg_replace('/'. self::QUERY_FRACTION .'/', '/', $css); - - // Replace multiple semi-colons in a row by a single one - // See SF bug #1980989 - $css = preg_replace('/;;+/', ';', $css); - - // Restore new lines for /*! important comments - $css = preg_replace('/'. self::NL .'/', "\n", $css); - - // Lowercase all uppercase properties - $css = preg_replace_callback('/(\{|\;)([A-Z\-]+)(\:)/', array($this, 'lowercase_properties'), $css); - - // Some source control tools don't like it when files containing lines longer - // than, say 8000 characters, are checked in. The linebreak option is used in - // that case to split long lines after a specific column. - if ($linebreak_pos !== FALSE && (int) $linebreak_pos >= 0) { - $linebreak_pos = (int) $linebreak_pos; - $start_index = $i = 0; - while ($i < strlen($css)) { - $i++; - if ($css[$i - 1] === '}' && $i - $start_index > $linebreak_pos) { - $css = $this->str_slice($css, 0, $i) . "\n" . $this->str_slice($css, $i); - $start_index = $i; - } - } - } - - // restore preserved comments and strings in reverse order - for ($i = count($this->preserved_tokens) - 1; $i >= 0; $i--) { - $css = preg_replace('/' . self::TOKEN . $i . '___/', $this->preserved_tokens[$i], $css, 1); - } - - // Trim the final string (for any leading or trailing white spaces) - return trim($css); - } - - /** - * Utility method to replace all data urls with tokens before we start - * compressing, to avoid performance issues running some of the subsequent - * regexes against large strings chunks. - * - * @param string $css - * @return string - */ - private function extract_data_urls($css) - { - // Leave data urls alone to increase parse performance. - $max_index = strlen($css) - 1; - $append_index = $index = $last_index = $offset = 0; - $sb = array(); - $pattern = '/url\(\s*(["\']?)data\:/i'; - - // 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, - // to determine whether or not we have matching string terminators and - // handling sb appends directly, instead of using matcher.append* methods. - - while (preg_match($pattern, $css, $m, 0, $offset)) { - $index = $this->index_of($css, $m[0], $offset); - $last_index = $index + strlen($m[0]); - $start_index = $index + 4; // "url(".length() - $end_index = $last_index - 1; - $terminator = $m[1]; // ', " or empty (not quoted) - $found_terminator = FALSE; - - if (strlen($terminator) === 0) { - $terminator = ')'; - } - - while ($found_terminator === FALSE && $end_index+1 <= $max_index) { - $end_index = $this->index_of($css, $terminator, $end_index + 1); - - // endIndex == 0 doesn't really apply here - if ($end_index > 0 && substr($css, $end_index - 1, 1) !== '\\') { - $found_terminator = TRUE; - if (')' != $terminator) { - $end_index = $this->index_of($css, ')', $end_index); - } - } - } - - // Enough searching, start moving stuff over to the buffer - $sb[] = $this->str_slice($css, $append_index, $index); - - if ($found_terminator) { - $token = $this->str_slice($css, $start_index, $end_index); - $token = preg_replace('/\s+/', '', $token); - $this->preserved_tokens[] = $token; - - $preserver = 'url(' . self::TOKEN . (count($this->preserved_tokens) - 1) . '___)'; - $sb[] = $preserver; - - $append_index = $end_index + 1; - } else { - // No end terminator found, re-add the whole match. Should we throw/warn here? - $sb[] = $this->str_slice($css, $index, $last_index); - $append_index = $last_index; - } - - $offset = $last_index; - } - - $sb[] = $this->str_slice($css, $append_index); - - return implode('', $sb); - } - - /** - * 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). - * e.g. #AddressForm { ... } - * - * DOES NOT compress IE filters, which have hex color values (which would break things). - * e.g. filter: chroma(color="#FFFFFF"); - * - * DOES NOT compress invalid hex values. - * e.g. background-color: #aabbccdd - * - * @param string $css - * @return string - */ - private function compress_hex_colors($css) - { - // Look for hex colors inside { ... } (to avoid IDs) and which don't have a =, or a " in front of them (to avoid filters) - $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; - $sb = array(); - // See: http://ajaxmin.codeplex.com/wikipage?title=CSS%20Colors - $short_safe = array( - '#808080' => 'gray', - '#008000' => 'green', - '#800000' => 'maroon', - '#000080' => 'navy', - '#808000' => 'olive', - '#ffa500' => 'orange', - '#800080' => 'purple', - '#c0c0c0' => 'silver', - '#008080' => 'teal', - '#f00' => 'red' - ); - - while (preg_match($pattern, $css, $m, 0, $offset)) { - $index = $this->index_of($css, $m[0], $offset); - $last_index = $index + strlen($m[0]); - $is_filter = $m[1] !== null && $m[1] !== ''; - - $sb[] = $this->str_slice($css, $_index, $index); - - if ($is_filter) { - // Restore, maintain case, otherwise filter will break - $sb[] = $m[1] . '#' . $m[2] . $m[3] . $m[4] . $m[5] . $m[6] . $m[7]; - } else { - if (strtolower($m[2]) == strtolower($m[3]) && - strtolower($m[4]) == strtolower($m[5]) && - strtolower($m[6]) == strtolower($m[7])) { - // Compress. - $hex = '#' . strtolower($m[3] . $m[5] . $m[7]); - } else { - // Non compressible color, restore but lower case. - $hex = '#' . strtolower($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]); - } - - $sb[] = $this->str_slice($css, $_index); - - return implode('', $sb); - } - - /* CALLBACKS - * --------------------------------------------------------------------------------------------- - */ - - private function replace_string($matches) - { - $match = $matches[0]; - $quote = substr($match, 0, 1); - // Must use addcslashes in PHP to avoid parsing of backslashes - $match = addcslashes($this->str_slice($match, 1, -1), '\\'); - - // maybe the string contains a comment-like substring? - // one, maybe more? put'em back then - if (($pos = $this->index_of($match, self::COMMENT)) >= 0) { - for ($i = 0, $max = count($this->comments); $i < $max; $i++) { - $match = preg_replace('/' . self::COMMENT . $i . '___/', $this->comments[$i], $match, 1); - } - } - - // minify alpha opacity in filter strings - $match = preg_replace('/progid\:DXImageTransform\.Microsoft\.Alpha\(Opacity\=/i', 'alpha(opacity=', $match); - - $this->preserved_tokens[] = $match; - return $quote . self::TOKEN . (count($this->preserved_tokens) - 1) . '___' . $quote; - } - - private function replace_colon($matches) - { - return preg_replace('/\:/', self::CLASSCOLON, $matches[0]); - } - - private function replace_calc($matches) - { - $this->preserved_tokens[] = trim(preg_replace('/\s*([\*\/\(\),])\s*/', '$1', $matches[2])); - return 'calc('. self::TOKEN . (count($this->preserved_tokens) - 1) . '___' . ')'; - } - - private function preserve_old_IE_specific_matrix_definition($matches) - { - $this->preserved_tokens[] = $matches[1]; - return 'filter:progid:DXImageTransform.Microsoft.Matrix(' . self::TOKEN . (count($this->preserved_tokens) - 1) . '___' . ')'; - } - - private function replace_keyframe_zero($matches) - { - return $matches[1] . preg_replace('/0\s*,/', '0%,', preg_replace('/\s*0\s*\{/', '0%{', $matches[2])); - } - - private function rgb_to_hex($matches) - { - // Support for percentage values rgb(100%, 0%, 45%); - if ($this->index_of($matches[1], '%') >= 0){ - $rgbcolors = explode(',', str_replace('%', '', $matches[1])); - for ($i = 0; $i < count($rgbcolors); $i++) { - $rgbcolors[$i] = $this->round_number(floatval($rgbcolors[$i]) * 2.55); - } - } else { - $rgbcolors = explode(',', $matches[1]); - } - - // Values outside the sRGB color space should be clipped (0-255) - for ($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) . $matches[2]; - } - - private function hsl_to_hex($matches) - { - $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, $matches[2])); - } - - private function lowercase_pseudo_first($matches) - { - return ':first-'. strtolower($matches[1]) .' '. $matches[2]; - } - - private function lowercase_directives($matches) - { - return '@'. strtolower($matches[1]); - } - - private function lowercase_pseudo_elements($matches) - { - return ':'. strtolower($matches[1]); - } - - private function lowercase_common_functions($matches) - { - return ':'. strtolower($matches[1]) .'('; - } - - private function lowercase_common_functions_values($matches) - { - return $matches[1] . strtolower($matches[2]); - } - - private function lowercase_properties($matches) - { - return $matches[1].strtolower($matches[2]).$matches[3]; - } - - /* HELPERS - * --------------------------------------------------------------------------------------------- - */ - - private function hue_to_rgb($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 - * Author: Tubal Martin http://blog.margenn.com - * - * @param string $haystack - * @param string $needle - * @param int $offset index (optional) - * @return int - */ - private function index_of($haystack, $needle, $offset = 0) - { - $index = strpos($haystack, $needle, $offset); - - return ($index !== FALSE) ? $index : -1; - } - - /** - * PHP port of Javascript's "slice" function for strings only - * Author: Tubal Martin http://blog.margenn.com - * Tests: http://margenn.com/tubal/str_slice/ - * - * @param string $str - * @param int $start index - * @param int|bool $end index (optional) - * @return string - */ - private function str_slice($str, $start = 0, $end = FALSE) - { - if ($end !== FALSE && ($start < 0 || $end <= 0)) { - $max = strlen($str); - - if ($start < 0) { - if (($start = $max + $start) < 0) { - return ''; - } - } - - if ($end < 0) { - if (($end = $max + $end) < 0) { - return ''; - } - } - - if ($end <= $start) { - return ''; - } - } - - $slice = ($end === FALSE) ? substr($str, $start) : substr($str, $start, $end - $start); - return ($slice === FALSE) ? '' : $slice; - } - - /** - * Convert strings like "64M" or "30" to int values - * @param mixed $size - * @return int - */ - private function normalize_int($size) - { - if (is_string($size)) { - switch (substr($size, -1)) { - case 'M': case 'm': return $size * 1048576; - case 'K': case 'k': return $size * 1024; - case 'G': case 'g': return $size * 1073741824; - } - } - - return (int) $size; - } -} \ No newline at end of file