<?php
/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the LGPL. For more information please see
 * <http://phing.info>.
*/

include_once 'C:\Lib\csstidy-1.3\class.csstidy.php';
include_once 'phing/filters/BaseParamFilterReader.php';
include_once 'phing/filters/ChainableReader.php';

/**
 * This filter uses the PHP package CssTidy.  This file was modeled after the XsltFilter and TidyFilter included with Phing.
 * 
 * <p>
 * Sample build.xml target:<br/>
 * <pre>
 *     <target name="pack-css">
 *        <copy todir="./Web/css" overwrite="true">
 *            <fileset dir="../Web/css">
 *                <include name="*.css" />
 *            </fileset>
 *
 *            <filterchain>
 *                <filterreader classname="phing.filters.CssTidyFilter">
 *                    <param name="remove_last_;" value="true"/>
 *                    <param name="preserveCss" value="false"/>
 *                    <param name="template" value="high_compression"/>
 *                </filterreader>
 *            </filterchain>
 *        </copy>
 *    </target>
 * </pre>
 * 
 * @author Zach Leatherman <http://www.zachleat.com>
 * @version   $Revision: 1.0 $ $Date: 2007/08/10 23:29 $
 * @package   phing.filters
 */
class CssTidyFilter extends BaseParamFilterReader implements ChainableReader {

    private $removeBackslashes; // true
    private $compressColors; // true
    private $compressFontWeight; // true
    private $lowercaseSelectors; // false
    private $optimizeShorthand; // 1 ?
    private $removeLastSemicolon; // false
    private $propertyCase; // 1 (default) for lower, 2 for upper, else for neither
    private $sortProperties; // false
    private $sortSelectors; // false
    private $mergeSelectors; //  1 for explode multiple selectors, 2 (default) tries to merge, else for neither
    private $discardInvalidProperties; // false
    private $cssLevel; // CSS2.1
    private $preserveCss; // false
    private $timestamp; // false, adds a timestamp to output
    private $template; // compression level, low_compression, default (default), high_compression, highest_compression

    public function setRemoveBackslashes($v) {
        $this->removeBackslashes = $v;
    }
    public function setCompressColors($v) {
        $this->compressColors = $v;
    }
    public function setCompressFontWeight($v) {
        $this->compressFontWeight = $v;
    }
    public function setLowercaseSelectors($v) {
        $this->lowercaseSelectors = $v;
    }
    public function setOptimizeShorthand($v) {
        $this->optimizeShorthand = $v;
    }
    public function setRemoveLastSemicolon($v) {
        $this->removeLastSemicolon = $v;
    }
    public function setPropertyCase($v) {
        $this->propertyCase = $v;
    }
    public function setSortProperties($v) {
        $this->sortProperties = $v;
    }
    public function setSortSelectors($v) {
        $this->sortSelectors = $v;
    }
    public function setMergeSelectors($v) {
        $this->mergeSelectors = $v;
    }
    public function setDiscardInvalidProperties($v) {
        $this->discardInvalidProperties = $v;
    }
    public function setCssLevel($v) {
        $this->cssLevel = $v;
    }
    public function setPreserveCss($v) {
        $this->preserveCss = $v;
    }
    public function setTimestamp($v) {
        $this->timestamp = $v;
    }
    public function setTemplate($v) {
        $this->template = $v;
    }

    public function getRemoveBackslashes() {
        return $this->removeBackslashes;
    }
    public function getCompressColors() {
        return $this->compressColors;
    }
    public function getCompressFontWeight() {
        return $this->compressFontWeight;
    }
    public function getLowercaseSelectors() {
        return $this->lowercaseSelectors;
    }
    public function getOptimizeShorthand() {
        return $this->optimizeShorthand;
    }
    public function getRemoveLastSemicolon() {
        return $this->removeLastSemicolon;
    }
    public function getPropertyCase() {
        return $this->propertyCase;
    }
    public function getSortProperties() {
        return $this->sortProperties;
    }
    public function getSortSelectors() {
        return $this->sortSelectors;
    }
    public function getMergeSelectors() {
        return $this->mergeSelectors;
    }
    public function getDiscardInvalidProperties() {
        return $this->discardInvalidProperties;
    }
    public function getCssLevel() {
        return $this->cssLevel;
    }
    public function getPreserveCss() {
        return $this->preserveCss;
    }
    public function getTimestamp() {
        return $this->timestamp;
    }
    public function getTemplate() {
        return $this->template;
    }
    
    /**
     * Reads input and returns CssTidy-filtered output.
     * 
     * @return the resulting stream, or -1 if the end of the resulting stream has been reached
     * 
     * @throws IOException if the underlying stream throws an IOException
     *                        during reading     
     */
    function read($len = null) {
        
        if (!class_exists('csstidy')) {
            throw new BuildException("You must include the csstidy class before you can use the CssTidyFilter.");
        }
        if ( !$this->getInitialized() ) {
            $this->_initialize();
            $this->setInitialized(true);
        }

        $_css = null;
        while ( ($data = $this->in->read($len)) !== -1 )
            $_css .= $data;

        if ($_css === null ) { // EOF?
            return -1;
        }

        $out = '';
        try {
            $css = new csstidy();
            if(!empty($this->removeBackslashes))
                $css->set_cfg('remove_blash',$this->removeBackslashes=='true'?true:false);
            if(!empty($this->compressColors))
                $css->set_cfg('compress_colors',$this->compressColors=='true'?true:false);
            if(!empty($this->compressFontWeight))
                $css->set_cfg('compress_font-weight',$this->compressFontWeight=='true'?true:false);
            if(!empty($this->lowercaseSelectors))
                $css->set_cfg('lowercase_s',$this->lowercaseSelectors=='true'?true:false);
            if(!empty($this->optimizeShorthand))
                $css->set_cfg('optimise_shorthands',intval($this->optimizeShorthand));
            if(!empty($this->removeLastSemicolon))
                $css->set_cfg('remove_last_;',$this->removeLastSemicolon=='true'?true:false);
            if(!empty($this->propertyCase))
                $css->set_cfg('case_properties',intval($this->propertyCase));
            if(!empty($this->sortProperties))
                $css->set_cfg('sort_properties',$this->sortProperties=='true'?true:false);
            if(!empty($this->sortSelectors))
                $css->set_cfg('sort_selectors',$this->sortSelectors=='true'?true:false);
            if(!empty($this->mergeSelectors))
                $css->set_cfg('merge_selectors',intval($this->mergeSelectors));
            if(!empty($this->discardInvalidProperties))
                $css->set_cfg('discard_invalid_properties',$this->discardInvalidProperties=='true'?true:false);
            if(!empty($this->cssLevel))
                $css->set_cfg('css_level',$this->cssLevel);
            if(!empty($this->preserveCss))
                $css->set_cfg('preserve_css',$this->preserveCss=='true'?true:false);
            if(!empty($this->timestamp))
                $css->set_cfg('timestamp',$this->timestamp=='true'?true:false);
            if(!empty($this->template))
                $css->load_template($this->template);

            $css->parse($_css);
            $out = $css->print->plain();
        } catch (Exception $e) {            
            throw new BuildException($e);
        }

        return $out;
    }


    /**
     * Creates a new CssTidyFilter using the passed in Reader for instantiation.
     * 
     * @param reader A Reader object providing the underlying stream.
     *               Must not be <code>null</code>.
     * 
     * @return a new filter based on this configuration, but filtering
     *         the specified reader
     */
    public function chain(Reader $reader) {
        $newFilter = new CssTidyFilter($reader);
        $newFilter->setInitialized(true);
        $newFilter->setRemoveBackslashes($this->getRemoveBackslashes());
        $newFilter->setCompressColors($this->getCompressColors());
        $newFilter->setCompressFontWeight($this->getCompressFontWeight());
        $newFilter->setLowercaseSelectors($this->getLowercaseSelectors());
        $newFilter->setOptimizeShorthand($this->getOptimizeShorthand());
        $newFilter->setRemoveLastSemicolon($this->getRemoveLastSemicolon());
        $newFilter->setPropertyCase($this->getPropertyCase());
        $newFilter->setSortProperties($this->getSortProperties());
        $newFilter->setSortSelectors($this->getSortSelectors());
        $newFilter->setMergeSelectors($this->getMergeSelectors());
        $newFilter->setDiscardInvalidProperties($this->getDiscardInvalidProperties());
        $newFilter->setCssLevel($this->getCssLevel());
        $newFilter->setPreserveCss($this->getPreserveCss());
        $newFilter->setTimestamp($this->getTimestamp());
        $newFilter->setTemplate($this->getTemplate());
        return $newFilter;
    }
    
    /**
     * Initializes any parameters (e.g. config options).
     * This method is only called when this filter is used through a <filterreader> tag in build file.
     */
    private function _initialize() {        
        $params = $this->getParameters();
        if ( $params !== null ) {
            for($i = 0, $_i=count($params) ; $i < $_i; $i++) {
                if ( $params[$i]->getType() === null ) {
                    if ($params[$i]->getName() === "remove_blash") {
                        $this->setRemoveBackslashes($params[$i]->getValue());
                    } elseif ($params[$i]->getName() === "compress_colors") {
                        $this->setCompressColors($params[$i]->getValue());
                    } elseif ($params[$i]->getName() === "compress_font-weight") {
                        $this->setCompressFontWeight($params[$i]->getValue());
                    } elseif ($params[$i]->getName() === "lowercase_s") {
                        $this->setLowercaseSelectors($params[$i]->getValue());
                    } elseif ($params[$i]->getName() === "optimise_shorthands") {
                        $this->setOptimizeShorthand($params[$i]->getValue());
                    } elseif ($params[$i]->getName() === "remove_last_;") {
                        $this->setRemoveLastSemicolon($params[$i]->getValue());
                    } elseif ($params[$i]->getName() === "case_properties") {
                        $this->setPropertyCase($params[$i]->getValue());
                    } elseif ($params[$i]->getName() === "sort_properties") {
                        $this->setSortProperties($params[$i]->getValue());
                    } elseif ($params[$i]->getName() === "sort_selectors") {
                        $this->setSortSelectors($params[$i]->getValue());
                    } elseif ($params[$i]->getName() === "merge_selectors") {
                        $this->setMergeSelectors($params[$i]->getValue());
                    } elseif ($params[$i]->getName() === "discard_invalid_properties") {
                        $this->setDiscardInvalidProperties($params[$i]->getValue());
                    } elseif ($params[$i]->getName() === "css_level") {
                        $this->setCssLevel($params[$i]->getValue());
                    } elseif ($params[$i]->getName() === "preserve_css") {
                        $this->setPreserveCss($params[$i]->getValue());
                    } elseif ($params[$i]->getName() === "timestamp") {
                        $this->setTimestamp($params[$i]->getValue());
                    } elseif ($params[$i]->getName() === "template") {
                        $this->setTemplate($params[$i]->getValue());
                    }
                }
            }
        }
    }
}