75 lines
2.0 KiB
PHP
75 lines
2.0 KiB
PHP
<?php
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namespace W3TC;
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class UserExperience_LazyLoad_GoogleMaps_WPGoogleMaps {
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private $preload_url = '';
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public function w3tc_lazyload_mutator_before( $data ) {
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$buffer = $data['buffer'];
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$buffer = preg_replace_callback(
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'~(<script\s[^>]+>)~i',
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array( $this, 'tag_script' ), $buffer
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);
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if ( !empty( $this->preload_url ) ) {
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$preload_html = '<link rel="preload" href="' . esc_url( $this->preload_url ) . '" as="script">';
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$buffer = preg_replace( '~<head(\s+[^>]*)*>~Ui',
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'\\0' . $preload_html, $buffer, 1 );
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add_filter( 'w3tc_lazyload_on_initialized_javascript', array(
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$this, 'w3tc_lazyload_on_initialized_javascript' ) );
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}
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$data['buffer'] = $buffer;
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$data['modified'] |= !empty( $this->preload_url );
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return $data;
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}
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public function tag_script( $m ) {
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$script_tag = $m[0];
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if ( !preg_match( '~<script\s+[^<>]*src=["\']?([^"\'> ]+)["\'> ]~is',
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$script_tag, $match ) ) {
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return $script_tag;
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}
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$script_src = $match[1];
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$script_src = Util_Environment::url_relative_to_full( $script_src );
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if ( !$this->starts_with( $script_src, WP_PLUGIN_URL . '/wp-google-maps/js/wpgmaps.js' ) ) {
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return $script_tag;
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}
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$this->preload_url = $script_src;
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return '';
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}
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private function starts_with( $v, $prefix ) {
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return substr( $v, 0, strlen( $prefix ) ) == $prefix;
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}
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public function w3tc_lazyload_on_initialized_javascript() {
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return 'window.w3tc_lazyLazy_googlemaps_wpmaps = new LazyLoad({' .
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'elements_selector: "#wpgmza_map",'.
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'callback_enter: function(e){' .
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// w3tc_load_js function
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'function w3tc_load_js(t,n){"use strict";var o=document.getElementsByTagName("script")[0],r=document.createElement("script");return r.src=t,r.async=!0,o.parentNode.insertBefore(r,o),n&&"function"==typeof n&&(r.onload=n),r};' .
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// hack to allow initialize-on-load script pass
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'MYMAP = {init: function() {},placeMarkers: function() {}};' .
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'w3tc_load_js("' . esc_url( $this->preload_url ) . '", function() {InitMap()});' .
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'}});';
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}
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}
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