Elep

<?php

/**
 * 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 == '') ? [] : (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(["\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 = [];
        $css = cssmin::minify($css, $options);
        $items = [];
        preg_match_all('/(.+){(.+:.+);}/U', $css, $items);
        if (safeCount($items[0]) > 0) {
            for ($i = 0; $i < safeCount($items[0]); $i++) {
                $keys = explode(',', $items[1][$i]);
                $styles_tmp = explode(';', $items[2][$i]);
                $styles = [];
                foreach ($styles_tmp as $style) {
                    $style_tmp = explode(':', $style);
                    $styles[$style_tmp[0]] = $style_tmp[1];
                }
                $r[] =
                    [
                        'keys' => cssmin_array_clean($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)
{
    $r = [];
    if (cssmin_array_is_assoc($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]) . ')';
}