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<?php
if(!defined('sugarEntry') || !sugarEntry) die('Not A Valid Entry Point');
/**
* cssmin.php - A simple CSS minifier.
* --
*
* <code>
* include("cssmin.php");
* file_put_contents("path/to/target.css", cssmin::minify(file_get_contents("path/to/source.css")));
* </code>
* --
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
* --
*
* @package cssmin
* @author Joe Scylla <joe.scylla@gmail.com>
* @copyright 2008 Joe Scylla <joe.scylla@gmail.com>
* @license http://opensource.org/licenses/mit-license.php MIT License
* @version 1.0.1.b3 (2008-10-02)
*/
class cssmin
{
/**
* Minifies stylesheet definitions
*
* <code>
* $css_minified = cssmin::minify(file_get_contents("path/to/target/file.css"));
* </code>
*
* @param string $css Stylesheet definitions as string
* @param array|string $options Array or comma speperated list of options:
*
* - remove-last-semicolon: Removes the last semicolon in
* the style definition of an element (activated by default).
*
* - preserve-urls: Preserves every url defined in an url()-
* expression. This option is only required if you have
* defined really uncommon urls with multiple spaces or
* combination of colon, semi-colon, braces with leading or
* following spaces.
* @return string Minified stylesheet definitions
*/
public static function minify($css, $options = "remove-last-semicolon")
{
$options = ($options == "") ? array() : (is_array($options) ? $options : explode(",", $options));
if (in_array("preserve-urls", $options))
{
// Encode url() to base64
$css = preg_replace_callback("/url\s*\((.*)\)/siU", "cssmin_encode_url", $css);
}
// Remove comments
$css = preg_replace("/\/\*[\d\D]*?\*\/|\t+/", " ", $css);
// Replace CR, LF and TAB to spaces
$css = str_replace(array("\n", "\r", "\t"), " ", $css);
// Replace multiple to single space
$css = preg_replace("/\s\s+/", " ", $css);
// Remove unneeded spaces
$css = preg_replace("/\s*({|}|\[|=|~|\+|>|\||;|:|,)\s*/", "$1", $css);
if (in_array("remove-last-semicolon", $options))
{
// Removes the last semicolon of every style definition
$css = str_replace(";}", "}", $css);
}
$css = trim($css);
if (in_array("preserve-urls", $options))
{
// Decode url()
$css = preg_replace_callback("/url\s*\((.*)\)/siU", "cssmin_encode_url", $css);
}
return $css;
}
/**
* Return a array structure of a stylesheet definitions.
*
* <code>
* $css_structure = cssmin::toArray(file_get_contents("path/to/target/file.css"));
* </code>
*
* @param string $css Stylesheet definitions as string
* @param string $options Options for {@link cssmin::minify()}
* @return array Structure of the stylesheet definitions as array
*/
public static function toArray($css, $options = "")
{
$r = array();
$css = cssmin::minify($css, $options);
$items = array();
preg_match_all("/(.+){(.+:.+);}/U", $css, $items);
if (count($items[0]) > 0)
{
for ($i = 0; $i < count($items[0]); $i++)
{
$keys = explode(",", $items[1][$i]);
$styles_tmp = explode(";", $items[2][$i]);
$styles = array();
foreach ($styles_tmp as $style)
{
$style_tmp = explode(":", $style);
$styles[$style_tmp[0]] = $style_tmp[1];
}
$r[] = array
(
"keys" => cssmin_array_clean($keys),
"styles" => cssmin_array_clean($styles)
);
}
}
return $r;
}
/**
* Return a array structure created by {@link cssmin::toArray()} to a string.
*
* <code>
* $css_string = cssmin::toString($css_structure);
* </code>
*
* @param array $css
* @return array
*/
public static function toString(array $array)
{
$r = "";
foreach ($array as $item)
{
$r .= implode(",", $item["keys"]) . "{";
foreach ($item["styles"] as $key => $value)
{
$r .= $key . ":" . $value . ";";
}
$r .= "}";
}
return $r;
}
}
/**
* Trims all elements of the array and removes empty elements.
*
* @param array $array
* @return array
*/
function cssmin_array_clean(array $array)
{
$r = array();
if (cssmin_array_is_assoc($array))
{
foreach ($array as $key => $value)
{
$r[$key] = trim($value);
}
}
else
{
foreach ($array as $value)
{
if (trim($value) != "")
{
$r[] = trim($value);
}
}
}
return $r;
}
/**
* Return if a value is a associative array.
*
* @param array $array
* @return bool
*/
function cssmin_array_is_assoc($array)
{
if (!is_array($array))
{
return false;
}
else
{
krsort($array, SORT_STRING);
return !is_numeric(key($array));
}
}
/**
* Encodes a url() expression.
*
* @param array $match
* @return string
*/
function cssmin_encode_url($match)
{
return "url(" . base64_encode(trim($match[1])) . ")";
}
/**
* Decodes a url() expression.
*
* @param array $match
* @return string
*/
function cssmin_decode_url($match)
{
return "url(" . base64_decode($match[1]) . ")";
}
?>
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