168 lines
3.3 KiB
PHP
168 lines
3.3 KiB
PHP
<?php
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/**
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* File: UserExperience_Remove_CssJs_Mutator.php
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*
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* CSS/JS feature mutator for buffer processing.
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*
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* @since 2.7.0
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*
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* @package W3TC
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*/
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namespace W3TC;
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/**
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* UserExperience Remove CSS/JS Mutator.
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*
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* @since 2.7.0
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*/
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class UserExperience_Remove_CssJs_Mutator {
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/**
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* Config.
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*
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* @var object
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*/
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private $config;
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/**
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* Array of includes.
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*
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* @var array
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*/
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private $includes = array();
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/**
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* Array of singles includes.
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*
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* @var array
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*/
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private $singles_includes = array();
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/**
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* User Experience Remove CSS/JS Mutator constructor.
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*
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* @since 2.7.0
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*
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* @param object $config Config object.
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*
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* @return void
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*/
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public function __construct( $config ) {
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$this->config = $config;
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}
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/**
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* Runs User Experience Remove CSS/JS Mutator.
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*
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* @since 2.7.0
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*
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* @param string $buffer Buffer string containing browser output.
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*
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* @return string
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*/
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public function run( $buffer ) {
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$r = apply_filters(
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'w3tc_remove_cssjs_mutator_before',
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array(
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'buffer' => $buffer,
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)
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);
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$buffer = $r['buffer'];
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// Sets includes whose matches will be stripped site-wide.
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$this->includes = $this->config->get_array(
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array(
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'user-experience-remove-cssjs',
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'includes',
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)
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);
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// Sets singles includes data whose matches will be removed on mated pages.
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$this->singles_includes = $this->config->get_array( 'user-experience-remove-cssjs-singles' );
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$buffer = preg_replace_callback(
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'~(<link.*?href.*?/>)|(<script.*?src.*?<\/script>)~is',
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array( $this, 'remove_content' ),
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$buffer
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);
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return $buffer;
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}
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/**
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* Removes matched link/script tag from HTML content.
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*
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* @since 2.7.0
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*
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* @param array $matches array of matched CSS/JS entries.
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*
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* @return string
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*/
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public function remove_content( $matches ) {
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$content = $matches[0];
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if ( is_main_query() && $this->is_content_included( $content ) ) {
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return '';
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}
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return $content;
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}
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/**
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* Checks if content has already been removed.
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*
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* @since 2.7.0
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*
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* @param string $content script tag string.
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*
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* @return boolean
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*/
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private function is_content_included( $content ) {
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global $wp;
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// Always removes matched CSS/JS for home page.
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if ( is_front_page() ) {
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foreach ( $this->includes as $include ) {
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if ( ! empty( $include ) ) {
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if ( strpos( $content, $include ) !== false ) {
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return true;
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}
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}
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}
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}
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// Build array of possible current page relative/absolute URLs.
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$current_pages = array(
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$wp->request,
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trailingslashit( $wp->request ),
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home_url( $wp->request ),
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trailingslashit( home_url( $wp->request ) ),
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);
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// Only removes matched CSS/JS on matching pages.
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foreach ( $this->singles_includes as $include => $pages ) {
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if (
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! empty( $pages )
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// Check if the given single CSS/JS remove rule URL is present in HTML content.
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&& strpos( $content, $include ) !== false
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// Check if current page matches defined pages for given single CSS/JS remove rule.
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&& array_intersect(
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$current_pages,
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// Remove leading / value from included page value(s) as the $wp->request excludes them.
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array_map(
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function ( $value ) {
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return ltrim( $value, '/' );
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},
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$pages['includes']
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)
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)
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) {
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return true;
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}
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}
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return false;
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}
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}
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