wp-optimize / minify / class-wp-optimize-minify-print.php

class-wp-optimize-minify-print.php in WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance 3.2.3, at minify/class-wp-optimize-minify-print.php

171 lines 5.5 KB

Raw Download Zip

1	<?php
2	if (!defined('ABSPATH')) die('No direct access allowed');
3
4	if (!class_exists('WP_Optimize_Minify_Functions')) {
5	include WP_OPTIMIZE_MINIFY_DIR.'/class-wp-optimize-minify-functions.php';
6	}
7
8	class WP_Optimize_Minify_Print {
9
10	/**
11	* Load the script using loadAsync JavaScript
12	*
13	* @param string $href
14	* @param boolean $print
15	* @return string\|void
16	*/
17	public static function async_script($href, $print = true) {
18	$wpo_minify_options = wp_optimize_minify_config()->get();
19	$tag = '<script>if (!navigator.userAgent.match(/'.implode('\|', $wpo_minify_options['ualist']).'/i)){' . "\n";
20	$tag .= " loadAsync('$href', null);" . "\n";
21	$tag .= '}</script>' . "\n";
22
23	if ($print) {
24	echo $tag;
25	} else {
26	return $tag;
27	}
28	}
29
30	/**
31	* Print a style that will be loaded async using 'preload'
32	*
33	* @param string $href
34	* @param string $media
35	* @return void
36	*/
37	public static function async_style($href, $media = 'all') {
38	echo '<link rel="preload" href="'.$href.'" as="style" media="'.$media.'" onload="this.onload=null;this.rel=\'stylesheet\'" />' . "\n";
39	// fix for firefox not supporting preload
40	echo '<link rel="stylesheet" href="'.$href.'" media="'.$media.'" />' . "\n";
41	echo '<noscript><link rel="stylesheet" href="'.$href.'" media="'.$media.'" /></noscript>' . "\n";
42	echo '<!--[if IE]><link rel="stylesheet" href="'.$href.'" media="'.$media.'" /><![endif]-->' . "\n";
43	}
44
45	/**
46	* Print a style that will be loaded by JS
47	*
48	* @param string $href
49	* @return void
50	*/
51	public static function exclude_style($href) {
52	$wpo_minify_options = wp_optimize_minify_config()->get();
53	// make a stylesheet, hide from PageSpeedIndex
54	$cssguid = 'wpo_min'.hash('adler32', $href);
55	echo '<script>if (!navigator.userAgent.match(/'.implode('\|', $wpo_minify_options['ualist']).'/i)){' . "\n";
56	echo ' var '.$cssguid.'=document.createElement("link");'.$cssguid.'.rel="stylesheet",'.$cssguid.'.type="text/css",'.$cssguid.'.media="async",'.$cssguid.'.href="'.$href.'",'.$cssguid.'.onload=function() {'.$cssguid.'.media="all"},document.getElementsByTagName("head")[0].appendChild('.$cssguid.');' . "\n";
57	echo '}</script>' . "\n";
58	}
59
60	/**
61	* Inline a single style
62	*
63	* @param string $handle
64	* @param string $href
65	* @return boolean
66	*/
67	public static function inline_style($handle, $href) {
68	$wpo_minify_options = wp_optimize_minify_config()->get();
69
70	// font awesome processing, inline
71	// download, minify, cache
72	$tkey = 'css-'.hash('adler32', $href).'.css';
73	$json = WP_Optimize_Minify_Cache_Functions::get_transient($tkey);
74	if (false === $json) {
75	$json = WP_Optimize_Minify_Functions::download_and_minify($href, null, $wpo_minify_options['enable_css_minification'], 'css', $handle);
76	if ($wpo_minify_options['debug']) {
77	echo "<!-- wpo_min DEBUG: Uncached file processing now for $href -->" . "\n";
78	}
79	WP_Optimize_Minify_Cache_Functions::set_transient($tkey, $json);
80	}
81
82	// decode
83	$res = json_decode($json, true);
84
85	// add font-display
86	// https://developers.google.com/web/updates/2016/02/font-display
87	$res['code'] = str_ireplace('font-style:normal;', 'font-display:block;font-style:normal;', $res['code']);
88
89	// inline css or fail
90	if (false != $res['status']) {
91	echo '<style type="text/css" media="all">' . "\n";
92	echo $res['code'] . "\n";
93	echo '</style>' . "\n";
94	return true;
95	} else {
96	return false;
97	}
98	}
99
100	/**
101	* Print a normal style tag pointing the href
102	*
103	* @param string $href
104	* @return void
105	*/
106	public static function style($href) {
107	echo '<link rel="stylesheet" href="'.$href.'" media="all">' . "\n";
108	}
109
110	/**
111	* Write header
112	*
113	* @param string $file
114	* @param string $headers
115	* @return void
116	*/
117	public static function write_header($file, $headers) {
118	file_put_contents($file, $headers);
119	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file);
120	}
121
122	/**
123	* Write CSS
124	*
125	* @param string $file
126	* @param string $code
127	* @param string $log
128	* @return void
129	*/
130	public static function write_combined_asset($file, $code, $log) {
131	file_put_contents($file.'.json', json_encode($log));
132	file_put_contents($file, $code);
133	// permissions
134	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file.'.json');
135	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file);
136
137	if (function_exists('gzencode')) {
138	file_put_contents($file.'.gz', gzencode(file_get_contents($file), 9));
139	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file.'.gz');
140	}
141
142	// brotli static support
143	if (function_exists('brotli_compress')) {
144	file_put_contents($file.'.br', brotli_compress(file_get_contents($file), 11));
145	WP_Optimize_Minify_Cache_Functions::fix_permission_bits($file.'.br');
146	}
147	}
148	/**
149	* Load async scripts with callback
150	*
151	* @return void
152	*/
153	public static function add_load_async() {
154	$min_or_not_internal = (defined('SCRIPT_DEBUG') && SCRIPT_DEBUG) ? '' : '-'. str_replace('.', '-', WPO_VERSION). '.min';
155	$contents = file_get_contents(trailingslashit(WPO_PLUGIN_MAIN_PATH) . "js/loadAsync$min_or_not_internal.js");
156	echo "<script>$contents</script>\n";
157	}
158
159	/**
160	* Defer CSS globally from the header (order matters)
161	* Dev: https://www.filamentgroup.com/lab/async-css.html
162	*
163	* @return void
164	*/
165	public static function add_load_css() {
166	$min_or_not_internal = (defined('SCRIPT_DEBUG') && SCRIPT_DEBUG) ? '' : '-'. str_replace('.', '-', WPO_VERSION). '.min';
167	$contents = file_get_contents(trailingslashit(WPO_PLUGIN_MAIN_PATH) . "js/loadCSS$min_or_not_internal.js");
168	echo "<script>$contents</script>" . "\n";
169	}
170	}
171