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Edit File: Minify_ContentMinifier.php

<?php
namespace W3TC;

/**
 * Minifiers object
 */

/**
 * class Minifier
 */
class Minify_ContentMinifier {
	/**
	 * Config instance
	 */
	var $_config = null;

/**
	 * Minifiers array
	 *
	 * @var array
	 */
	var $_minifiers = array(
		'combinejs' => array( '\W3TCL\Minify\Minify_CombineOnly', 'minify' ),
		'combinecss' => array( '\W3TCL\Minify\Minify_CombineOnly', 'minify' ),

'js' => array( '\W3TCL\Minify\JSMin', 'minify' ),
		'yuijs' => array( '\W3TCL\Minify\Minify_YUICompressor', 'minifyJs' ),
		'ccjs' => array( '\W3TCL\Minify\Minify_ClosureCompiler', 'minify' ),
		'jsminplus' => array( '\W3TCL\Minify\JSMinPlus', 'minify' ),
		'googleccjs' => array( '\W3TCL\Minify\Minify_JS_ClosureCompiler', 'minify' ),

'css' => array( '\W3TCL\Minify\Minify_CSS', 'minify' ),
		'yuicss' => array( '\W3TCL\Minify\Minify_YUICompressor', 'minifyCss' ),
		'cssmin' => array( '\W3TCL\YuiCssMin\Minifier', 'minify_static' ),
		'csstidy' => array( '\W3TCL\Minify\Minify_CSSTidy', 'minify' ),

'html' => array( '\W3TCL\Minify\Minify_HTML', 'minify' ),
		'htmlxml' => array( '\W3TCL\Minify\Minify_HTML', 'minify' ),

'htmltidy' => array( '\W3TCL\Minify\Minify_HTMLTidy', 'minifyXhtml' ),
		'htmltidyxml' => array( '\W3TCL\Minify\Minify_HTMLTidy', 'minifyXml' )
	);

/**
	 * PHP5-style constructor
	 */
	function __construct() {
		$this->_config = Dispatcher::config();
	}

/**
	 * Returns true if minifier exists
	 *
	 * @param string  $engine
	 * @return boolean
	 */
	function exists( $engine ) {
		return isset( $this->_minifiers[$engine] );
	}

/**
	 * Returns true if minifier available
	 *
	 * @param string  $engine
	 * @return boolean
	 */
	function available( $engine ) {
		switch ( $engine ) {
		case 'yuijs':
			$path_java = $this->_config->get_string( 'minify.yuijs.path.java' );
			$path_jar = $this->_config->get_string( 'minify.yuijs.path.jar' );

return file_exists( $path_java ) && file_exists( $path_jar );

case 'yuicss':
			$path_java = $this->_config->get_string( 'minify.yuicss.path.java' );
			$path_jar = $this->_config->get_string( 'minify.yuicss.path.jar' );

return file_exists( $path_java ) && file_exists( $path_jar );

case 'ccjs':
			$path_java = $this->_config->get_string( 'minify.ccjs.path.java' );
			$path_jar = $this->_config->get_string( 'minify.ccjs.path.jar' );

return file_exists( $path_java ) && file_exists( $path_jar );

case 'htmltidy':
		case 'htmltidyxml':
			return class_exists( 'tidy' );
		}

return $this->exists( $engine );
	}

/**
	 * Returns minifier
	 *
	 * @param string  $engine
	 * @return array
	 */
	function get_minifier( $engine ) {
		if ( isset( $this->_minifiers[$engine] ) ) {
			return $this->_minifiers[$engine];
		}

return null;
	}

/**
	 * Initializes minifier
	 *
	 * @param string  $engine
	 * @return void
	 */
	function init( $engine ) {
		switch ( $engine ) {
		case 'yuijs':
			\W3TCL\Minify\Minify_YUICompressor::$tempDir = Util_File::create_tmp_dir();
			\W3TCL\Minify\Minify_YUICompressor::$javaExecutable = $this->_config->get_string( 'minify.yuijs.path.java' );
			\W3TCL\Minify\Minify_YUICompressor::$jarFile = $this->_config->get_string( 'minify.yuijs.path.jar' );
			break;

case 'yuicss':
			\W3TCL\Minify\Minify_YUICompressor::$tempDir = Util_File::create_tmp_dir();
			\W3TCL\Minify\Minify_YUICompressor::$javaExecutable = $this->_config->get_string( 'minify.yuicss.path.java' );
			\W3TCL\Minify\Minify_YUICompressor::$jarFile = $this->_config->get_string( 'minify.yuicss.path.jar' );
			break;

case 'ccjs':
			\W3TCL\Minify\Minify_ClosureCompiler::$tempDir = Util_File::create_tmp_dir();
			\W3TCL\Minify\Minify_ClosureCompiler::$javaExecutable = $this->_config->get_string( 'minify.ccjs.path.java' );
			\W3TCL\Minify\Minify_ClosureCompiler::$jarFile = $this->_config->get_string( 'minify.ccjs.path.jar' );
			break;
		}
	}

/**
	 * Returns minifier options
	 *
	 * @param string  $engine
	 * @return array
	 */
	function get_options( $engine ) {
		$options = array();

switch ( $engine ) {
		case 'js':
			$options = array(
				'preserveComments' => !$this->_config->get_boolean( 'minify.js.strip.comments' ),
				'stripCrlf' => $this->_config->get_boolean( 'minify.js.strip.crlf' )
			);
			break;

case 'css':
			$options = array(
				'preserveComments' => !$this->_config->get_boolean( 'minify.css.strip.comments' ),
				'stripCrlf' => $this->_config->get_boolean( 'minify.css.strip.crlf' )
			);

$symlinks = $this->_config->get_array( 'minify.symlinks' );
			$docroot  = Util_Environment::document_root();

foreach ( $symlinks as $link => $target ) {
				$link = str_replace( '//', realpath( $docroot ), $link );
				$link = strtr( $link, '/', DIRECTORY_SEPARATOR );
				$options['symlinks'][$link] = realpath( $target );
			}
			break;

case 'yuijs':
			$options = array(
				'line-break' => $this->_config->get_integer( 'minify.yuijs.options.line-break' ),
				'nomunge' => $this->_config->get_boolean( 'minify.yuijs.options.nomunge' ),
				'preserve-semi' => $this->_config->get_boolean( 'minify.yuijs.options.preserve-semi' ),
				'disable-optimizations' => $this->_config->get_boolean( 'minify.yuijs.options.disable-optimizations' )
			);
			break;

case 'yuicss':
			$options = array(
				'line-break' => $this->_config->get_integer( 'minify.yuicss.options.line-break' )
			);
			break;

case 'ccjs':
			$options = array(
				'compilation_level' => $this->_config->get_string( 'minify.ccjs.options.compilation_level' ),
				'formatting' => $this->_config->get_string( 'minify.ccjs.options.formatting' )
			);
			break;

case 'googleccjs':
			$options = array(
				'compilation_level' => $this->_config->get_string( 'minify.ccjs.options.compilation_level' ),
				'formatting' => $this->_config->get_string( 'minify.ccjs.options.formatting' )
			);
			break;

case 'csstidy':
			$options = array(
				'remove_bslash' => $this->_config->get_boolean( 'minify.csstidy.options.remove_bslash' ),
				'compress_colors' => $this->_config->get_boolean( 'minify.csstidy.options.compress_colors' ),
				'compress_font-weight' => $this->_config->get_boolean( 'minify.csstidy.options.compress_font-weight' ),
				'lowercase_s' => $this->_config->get_boolean( 'minify.csstidy.options.lowercase_s' ),
				'optimise_shorthands' => $this->_config->get_integer( 'minify.csstidy.options.optimise_shorthands' ),
				'remove_last_;' => $this->_config->get_boolean( 'minify.csstidy.options.remove_last_;' ),
				'space_before_important' => !$this->_config->get_boolean( 'minify.csstidy.options.remove_space_before_important' ),
				'case_properties' => $this->_config->get_integer( 'minify.csstidy.options.case_properties' ),
				'sort_properties' => $this->_config->get_boolean( 'minify.csstidy.options.sort_properties' ),
				'sort_selectors' => $this->_config->get_boolean( 'minify.csstidy.options.sort_selectors' ),
				'merge_selectors' => $this->_config->get_integer( 'minify.csstidy.options.merge_selectors' ),
				'discard_invalid_selectors' => $this->_config->get_boolean( 'minify.csstidy.options.discard_invalid_selectors' ),
				'discard_invalid_properties' => $this->_config->get_boolean( 'minify.csstidy.options.discard_invalid_properties' ),
				'css_level' => $this->_config->get_string( 'minify.csstidy.options.css_level' ),
				'preserve_css' => $this->_config->get_boolean( 'minify.csstidy.options.preserve_css' ),
				'timestamp' => $this->_config->get_boolean( 'minify.csstidy.options.timestamp' ),
				'template' => $this->_config->get_string( 'minify.csstidy.options.template' )
			);
			break;

case 'html':
		case 'htmlxml':
			$options = array(
				'xhtml' => true,
				'stripCrlf' => $this->_config->get_boolean( 'minify.html.strip.crlf' ),
				'ignoredComments' => $this->_config->get_array( 'minify.html.comments.ignore' )
			);
			break;

case 'htmltidy':
		case 'htmltidyxml':
			$options = array(
				'clean' => $this->_config->get_boolean( 'minify.htmltidy.options.clean' ),
				'hide-comments' => $this->_config->get_boolean( 'minify.htmltidy.options.hide-comments' ),
				'wrap' => $this->_config->get_integer( 'minify.htmltidy.options.wrap' )
			);
			break;
		}

if ( $this->_config->get_boolean( 'browsercache.enabled' ) && ( $this->_config->get_boolean( 'browsercache.cssjs.replace' ) || $this->_config->get_boolean( 'browsercache.html.replace' ) || $this->_config->get_boolean( 'browsercache.other.replace' ) ) ) {
			$w3_plugin_browsercache = Dispatcher::component( 'BrowserCache_Plugin' );
			$browsercache_core = Dispatcher::component( 'BrowserCache_Core' );

$options = array_merge( $options, array(
					'browserCacheId' => $w3_plugin_browsercache->get_filename_uniqualizator(),
					'browserCacheExtensions' => $browsercache_core->get_replace_extensions( $this->_config )
				) );
		}

if ( $this->_config->get_boolean( 'cdn.enabled' ) ) {
			$common = Dispatcher::component( 'Cdn_Core' );
			$cdn = $common->get_cdn();

$options = array_merge( $options, array(
					'prependAbsolutePathCallback' => array( &$cdn, 'get_prepend_path' ),
				) );
		}

return $options;
	}
}