config = $config; $this->debug = $config->get_boolean( 'minify.debug' ); $this->buffer = $buffer; $this->minify_helpers = $minify_helpers; // ignored files $this->ignore_js_files = $this->config->get_array( 'minify.reject.files.js' ); $this->ignore_js_files = array_map( array( '\W3TC\Util_Environment', 'normalize_file' ), $this->ignore_js_files ); // define embed type $this->embed_type = array( 'head' => $this->config->get_string( 'minify.js.header.embed_type' ), 'body' => $this->config->get_string( 'minify.js.body.embed_type' ) ); } /** * Does auto-minification * * @return string buffer of minified content */ public function execute() { // find all script tags $buffer_nocomments = preg_replace( '~\s*~s', '', $this->buffer ); $matches = null; // end of means another group of scripts, cannt be combined if ( !preg_match_all( '~(]*>.*?|)~is', $buffer_nocomments, $matches ) ) { $matches = null; } if ( is_null( $matches ) ) { return $this->buffer; } $script_tags = $matches[1]; $script_tags = apply_filters( 'w3tc_minify_js_script_tags', $script_tags ); // pass scripts $this->files_to_minify = array( 'sync' => array( 'embed_pos' => 0, 'files' => array() ), 'async' => array( 'embed_pos' => 0, 'files' => array() ), 'defer' => array( 'embed_pos' => 0, 'files' => array() ) ); for ( $n = 0; $n < count( $script_tags ); $n++ ) { $this->process_script_tag( $script_tags[$n], $n ); } $this->flush_collected( 'sync', '' ); $this->flush_collected( 'async', '' ); $this->flush_collected( 'defer', '' ); return $this->buffer; } /** * Returns list of minified scripts * * @return array */ public function get_debug_minified_urls() { return $this->debug_minified_urls; } /** * Processes script tag * * @param unknown $script_tag * @return void */ private function process_script_tag( $script_tag, $script_tag_number ) { if ( $this->debug ) { Minify_Core::log( 'processing tag ' . substr( $script_tag, 0, 150 ) ); } $tag_pos = strpos( $this->buffer, $script_tag ); if ( $tag_pos === false ) { // script is external but not found, skip processing it if ( $this->debug ) { Minify_Core::log( 'script not found:' . $script_tag ); } return; } $match = null; if ( !preg_match( '~]*src=["\']?([^"\'> ]+)["\'> ]~is', $script_tag, $match ) ) { $match = null; } if ( is_null( $match ) ) { $data = array( 'script_tag_original' => $script_tag, 'script_tag_new' => $script_tag, 'script_tag_number' => $script_tag_number, 'script_tag_pos' => $tag_pos, 'should_replace' => false, 'buffer' => $this->buffer ); $data = apply_filters( 'w3tc_minify_js_do_local_script_minification', $data ); $this->buffer = $data['buffer']; if ( $data['should_replace'] ) { $this->buffer = substr_replace( $this->buffer, $data['script_tag_new'], $tag_pos, strlen( $script_tag ) ); } // it's not external script, have to flush what we have before it if ( $this->debug ) { Minify_Core::log( 'its not src=, flushing' ); } $this->flush_collected( 'sync', $script_tag ); if ( preg_match( '~~is', $script_tag, $match ) ) $this->group_type = 'body'; return; } $script_src = $match[1]; $script_src = Util_Environment::url_relative_to_full( $script_src ); $file = Util_Environment::url_to_docroot_filename( $script_src ); $step1_result = $this->minify_helpers->is_file_for_minification( $script_src, $file ); if ( $step1_result == 'url' ) $file = $script_src; $step1 = !empty( $step1_result ); $step2 = !in_array( $file, $this->ignore_js_files ); $do_tag_minification = $step1 && $step2; $do_tag_minification = apply_filters( 'w3tc_minify_js_do_tag_minification', $do_tag_minification, $script_tag, $file ); if ( !$do_tag_minification ) { if ( $this->debug ) { Minify_Core::log( 'file ' . $file . ' didnt pass minification check:' . ' file_for_min: ' . ( $step1 ? 'true' : 'false' ) . ' ignore_js_files: ' . ( $step2 ? 'true' : 'false' ) ); } $data = array( 'script_tag_original' => $script_tag, 'script_tag_new' => $script_tag, 'script_tag_number' => $script_tag_number, 'script_tag_pos' => $tag_pos, 'script_src' => $script_src, 'should_replace' => false, 'buffer' => $this->buffer ); $data = apply_filters( 'w3tc_minify_js_do_excluded_tag_script_minification', $data ); $this->buffer = $data['buffer']; if ( $data['should_replace'] ) { $this->buffer = substr_replace( $this->buffer, $data['script_tag_new'], $tag_pos, strlen( $script_tag ) ); } $this->flush_collected( 'sync', $script_tag ); return; } $this->debug_minified_urls[] = $file; $this->buffer = substr_replace( $this->buffer, '', $tag_pos, strlen( $script_tag ) ); $m = null; if ( !preg_match( '~\s+(async|defer)[> ]~is', $script_tag, $m ) ) { $sync_type = 'sync'; // for head group - put minified file at the place of first script // for body - put at the place of last script, to make as more DOM // objects available as possible if ( count( $this->files_to_minify[$sync_type]['files'] ) <= 0 || $this->group_type == 'body' ) { $this->files_to_minify[$sync_type]['embed_pos'] = $tag_pos; } } else { $sync_type = strtolower( $m[1] ); $this->files_to_minify[$sync_type]['embed_pos'] = $tag_pos; } $this->files_to_minify[$sync_type]['files'][] = $file; if ( $this->config->get_string( 'minify.js.method' ) == 'minify' ) $this->flush_collected( $sync_type, '' ); } /** * Minifies collected scripts */ private function flush_collected( $sync_type, $last_script_tag ) { if ( count( $this->files_to_minify[$sync_type]['files'] ) <= 0 ) { return; } $do_flush_collected = apply_filters( 'w3tc_minify_js_do_flush_collected', true, $last_script_tag, $this, $sync_type ); if ( !$do_flush_collected ) { return; } // build minified script tag if ( $sync_type == 'sync' ) { $embed_type = $this->embed_type[$this->group_type]; } elseif ( $sync_type == 'async' ) { $embed_type = 'nb-async'; } elseif ( $sync_type == 'defer' ) { $embed_type = 'nb-defer'; } $data = array( 'files_to_minify' => $this->files_to_minify[$sync_type]['files'], 'embed_pos' => $this->files_to_minify[$sync_type]['embed_pos'], 'embed_type' => $embed_type, 'buffer' => $this->buffer ); $data = apply_filters( 'w3tc_minify_js_step', $data ); $this->buffer = $data['buffer']; if ( !empty( $data['files_to_minify'] ) ) { $url = $this->minify_helpers->get_minify_url_for_files( $data['files_to_minify'], 'js' ); $script = ''; if ( !is_null( $url ) ) { $script .= $this->minify_helpers->generate_script_tag( $url, $data['embed_type'] ); } $data['script_to_embed_url'] = $url; $data['script_to_embed_body'] = $script; $data = apply_filters( 'w3tc_minify_js_step_script_to_embed', $data ); $this->buffer = $data['buffer']; if ( $this->config->getf_boolean( 'minify.js.http2push' ) ) { $this->minify_helpers->http2_header_add( $data['script_to_embed_url'], 'script' ); } // replace $this->buffer = substr_replace( $this->buffer, $data['script_to_embed_body'], $data['embed_pos'], 0 ); foreach ( $this->files_to_minify as $key => $i ) { if ( $key != $sync_type && $i['embed_pos'] >= $data['embed_pos'] ) { $this->files_to_minify[$key]['embed_pos'] += strlen( $data['script_to_embed_body'] ); } } } $this->files_to_minify[$sync_type] = array( 'embed_pos' => 0, 'files' => array() ); } }