345 lines
8.5 KiB
PHP
345 lines
8.5 KiB
PHP
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<?php
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namespace W3TC;
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class Minify_AutoJs {
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/**
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* Config
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*/
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private $config;
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/**
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* Processed buffer
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*
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* @var string
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*/
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private $buffer;
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/**
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* JS files to ignore
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*
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* @var array
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*/
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private $ignore_js_files;
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/**
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* Embed type
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*
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* @var string
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*/
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private $embed_type;
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/**
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* Helper object to use
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*
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* @var _W3_MinifyHelpers
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*/
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private $minify_helpers;
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/**
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* Array of processed scripts
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*
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* @var array
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*/
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private $debug_minified_urls = array();
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/**
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* Current list of script files to minify
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*/
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private $files_to_minify;
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/**
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* Current group type
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*
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* @var string
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*/
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private $group_type = 'head';
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private $debug = false;
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/**
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* Constructor
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*
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* @param unknown $config
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* @param unknown $buffer
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* @param unknown $minify_helpers
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*/
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function __construct( $config, $buffer, $minify_helpers ) {
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$this->config = $config;
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$this->debug = $config->get_boolean( 'minify.debug' );
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$this->buffer = $buffer;
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$this->minify_helpers = $minify_helpers;
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// ignored files
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$this->ignore_js_files = $this->config->get_array( 'minify.reject.files.js' );
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$this->ignore_js_files = array_map( array( '\W3TC\Util_Environment', 'normalize_file' ), $this->ignore_js_files );
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// define embed type
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$this->embed_type = array(
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'head' => $this->config->get_string( 'minify.js.header.embed_type' ),
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'body' => $this->config->get_string( 'minify.js.body.embed_type' )
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);
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}
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/**
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* Does auto-minification
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*
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* @return string buffer of minified content
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*/
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public function execute() {
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// find all script tags
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$buffer_nocomments = preg_replace( '~<!--.*?-->\s*~s', '', $this->buffer );
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$matches = null;
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// end of <head> means another group of scripts, cannt be combined
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if ( !preg_match_all( '~(<script\s*[^>]*>.*?</script>|</head>)~is',
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$buffer_nocomments, $matches ) ) {
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$matches = null;
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}
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if ( is_null( $matches ) ) {
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return $this->buffer;
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}
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$script_tags = $matches[1];
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$script_tags = apply_filters( 'w3tc_minify_js_script_tags',
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$script_tags );
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// pass scripts
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$this->files_to_minify = array(
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'sync' => array(
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'embed_pos' => 0,
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'files' => array()
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),
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'async' => array(
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'embed_pos' => 0,
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'files' => array()
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),
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'defer' => array(
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'embed_pos' => 0,
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'files' => array()
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)
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);
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for ( $n = 0; $n < count( $script_tags ); $n++ ) {
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$this->process_script_tag( $script_tags[$n], $n );
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}
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$this->flush_collected( 'sync', '' );
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$this->flush_collected( 'async', '' );
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$this->flush_collected( 'defer', '' );
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return $this->buffer;
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}
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/**
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* Returns list of minified scripts
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*
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* @return array
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*/
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public function get_debug_minified_urls() {
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return $this->debug_minified_urls;
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}
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/**
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* Processes script tag
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*
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* @param unknown $script_tag
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* @return void
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*/
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private function process_script_tag( $script_tag, $script_tag_number ) {
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if ( $this->debug ) {
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Minify_Core::log( 'processing tag ' . substr( $script_tag, 0, 150 ) );
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}
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$tag_pos = strpos( $this->buffer, $script_tag );
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if ( $tag_pos === false ) {
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// script is external but not found, skip processing it
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if ( $this->debug ) {
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Minify_Core::log( 'script not found:' . $script_tag );
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}
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return;
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}
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$match = null;
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if ( !preg_match( '~<script\s+[^<>]*src=["\']?([^"\'> ]+)["\'> ]~is',
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$script_tag, $match ) ) {
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$match = null;
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}
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if ( is_null( $match ) ) {
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$data = array(
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'script_tag_original' => $script_tag,
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'script_tag_new' => $script_tag,
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'script_tag_number' => $script_tag_number,
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'script_tag_pos' => $tag_pos,
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'should_replace' => false,
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'buffer' => $this->buffer
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);
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$data = apply_filters( 'w3tc_minify_js_do_local_script_minification',
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$data );
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$this->buffer = $data['buffer'];
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if ( $data['should_replace'] ) {
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$this->buffer = substr_replace( $this->buffer,
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$data['script_tag_new'], $tag_pos,
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strlen( $script_tag ) );
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}
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// it's not external script, have to flush what we have before it
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if ( $this->debug ) {
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Minify_Core::log( 'its not src=, flushing' );
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}
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$this->flush_collected( 'sync', $script_tag );
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if ( preg_match( '~</head>~is', $script_tag, $match ) )
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$this->group_type = 'body';
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return;
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}
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$script_src = $match[1];
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$script_src = Util_Environment::url_relative_to_full( $script_src );
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$file = Util_Environment::url_to_docroot_filename( $script_src );
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$step1_result = $this->minify_helpers->is_file_for_minification(
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$script_src, $file );
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if ( $step1_result == 'url' )
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$file = $script_src;
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$step1 = !empty( $step1_result );
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$step2 = !in_array( $file, $this->ignore_js_files );
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$do_tag_minification = $step1 && $step2;
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$do_tag_minification = apply_filters( 'w3tc_minify_js_do_tag_minification',
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$do_tag_minification, $script_tag, $file );
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if ( !$do_tag_minification ) {
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if ( $this->debug ) {
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Minify_Core::log( 'file ' . $file .
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' didnt pass minification check:' .
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' file_for_min: ' . ( $step1 ? 'true' : 'false' ) .
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' ignore_js_files: ' . ( $step2 ? 'true' : 'false' ) );
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}
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$data = array(
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'script_tag_original' => $script_tag,
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'script_tag_new' => $script_tag,
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'script_tag_number' => $script_tag_number,
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'script_tag_pos' => $tag_pos,
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'script_src' => $script_src,
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'should_replace' => false,
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'buffer' => $this->buffer
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);
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$data = apply_filters( 'w3tc_minify_js_do_excluded_tag_script_minification',
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$data );
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$this->buffer = $data['buffer'];
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if ( $data['should_replace'] ) {
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$this->buffer = substr_replace( $this->buffer,
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$data['script_tag_new'], $tag_pos,
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strlen( $script_tag ) );
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}
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$this->flush_collected( 'sync', $script_tag );
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return;
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}
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$this->debug_minified_urls[] = $file;
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$this->buffer = substr_replace( $this->buffer, '',
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$tag_pos, strlen( $script_tag ) );
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$m = null;
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if ( !preg_match( '~\s+(async|defer)[> ]~is', $script_tag, $m ) ) {
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$sync_type = 'sync';
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// for head group - put minified file at the place of first script
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// for body - put at the place of last script, to make as more DOM
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// objects available as possible
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if ( count( $this->files_to_minify[$sync_type]['files'] ) <= 0 ||
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$this->group_type == 'body' ) {
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$this->files_to_minify[$sync_type]['embed_pos'] = $tag_pos;
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}
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} else {
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$sync_type = strtolower( $m[1] );
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$this->files_to_minify[$sync_type]['embed_pos'] = $tag_pos;
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}
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$this->files_to_minify[$sync_type]['files'][] = $file;
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if ( $this->config->get_string( 'minify.js.method' ) == 'minify' )
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$this->flush_collected( $sync_type, '' );
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}
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/**
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* Minifies collected scripts
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*/
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private function flush_collected( $sync_type, $last_script_tag ) {
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if ( count( $this->files_to_minify[$sync_type]['files'] ) <= 0 ) {
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return;
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}
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$do_flush_collected = apply_filters( 'w3tc_minify_js_do_flush_collected',
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true, $last_script_tag, $this, $sync_type );
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if ( !$do_flush_collected ) {
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return;
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}
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// build minified script tag
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if ( $sync_type == 'sync' ) {
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$embed_type = $this->embed_type[$this->group_type];
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} elseif ( $sync_type == 'async' ) {
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$embed_type = 'nb-async';
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} elseif ( $sync_type == 'defer' ) {
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$embed_type = 'nb-defer';
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}
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$data = array(
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'files_to_minify' => $this->files_to_minify[$sync_type]['files'],
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'embed_pos' => $this->files_to_minify[$sync_type]['embed_pos'],
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'embed_type' => $embed_type,
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'buffer' => $this->buffer
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);
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$data = apply_filters( 'w3tc_minify_js_step', $data );
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$this->buffer = $data['buffer'];
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if ( !empty( $data['files_to_minify'] ) ) {
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$url = $this->minify_helpers->get_minify_url_for_files(
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$data['files_to_minify'], 'js' );
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$script = '';
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if ( !is_null( $url ) ) {
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$script .= $this->minify_helpers->generate_script_tag( $url,
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$data['embed_type'] );
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}
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$data['script_to_embed_url'] = $url;
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$data['script_to_embed_body'] = $script;
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$data = apply_filters( 'w3tc_minify_js_step_script_to_embed',
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$data );
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$this->buffer = $data['buffer'];
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if ( $this->config->getf_boolean( 'minify.js.http2push' ) ) {
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$this->minify_helpers->http2_header_add(
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$data['script_to_embed_url'], 'script' );
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}
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// replace
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$this->buffer = substr_replace( $this->buffer,
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$data['script_to_embed_body'], $data['embed_pos'], 0 );
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foreach ( $this->files_to_minify as $key => $i ) {
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if ( $key != $sync_type && $i['embed_pos'] >= $data['embed_pos'] ) {
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$this->files_to_minify[$key]['embed_pos'] += strlen( $data['script_to_embed_body'] );
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}
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}
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}
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$this->files_to_minify[$sync_type] = array(
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'embed_pos' => 0,
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'files' => array()
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);
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}
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}
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