|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/** |
|
4
|
|
|
* Optimizes page assets for unreliable networks and fast rendering, particularly with empty caches |
|
5
|
|
|
* - inline scripts and styles |
|
6
|
|
|
* - async external JS |
|
7
|
|
|
* - remove references to external fonts |
|
8
|
|
|
* - move CSS links below scripts in head (scripts after CSS blocks render until script finishes downloading) |
|
9
|
|
|
*/ |
|
10
|
|
|
|
|
11
|
|
|
class Jetpack_Perf_Optimize_Assets { |
|
12
|
|
|
private static $__instance = null; |
|
13
|
|
|
private $remove_remote_fonts = false; |
|
14
|
|
|
private $inline_scripts_and_styles = false; |
|
15
|
|
|
private $async_scripts = false; |
|
16
|
|
|
private $defer_scripts = false; |
|
17
|
|
|
private $inject_critical_css = false; |
|
18
|
|
|
private $minify_html = false; |
|
19
|
|
|
const INLINE_ASSET_MAX_SIZE_BYTES = 50 * 1024; // 10kb |
|
20
|
|
|
const INLINE_CSS_URL_MAX_SIZE_BYTES = 5 * 1024; // 5kb |
|
21
|
|
|
|
|
22
|
|
|
/** |
|
23
|
|
|
* Singleton implementation |
|
24
|
|
|
* |
|
25
|
|
|
* @return object |
|
26
|
|
|
*/ |
|
27
|
|
|
public static function instance() { |
|
28
|
|
|
if ( ! is_a( self::$__instance, 'Jetpack_Perf_Optimize_Assets' ) ) { |
|
29
|
|
|
self::$__instance = new Jetpack_Perf_Optimize_Assets(); |
|
30
|
|
|
} |
|
31
|
|
|
|
|
32
|
|
|
return self::$__instance; |
|
33
|
|
|
} |
|
34
|
|
|
|
|
35
|
|
|
public function disable_for_request() { |
|
36
|
|
|
$this->remove_remote_fonts = false; |
|
37
|
|
|
$this->inline_scripts_and_styles = false; |
|
38
|
|
|
$this->async_scripts = false; |
|
39
|
|
|
$this->defer_scripts = false; |
|
40
|
|
|
} |
|
41
|
|
|
|
|
42
|
|
|
/** |
|
43
|
|
|
* TODO: detect if this is worth doing for wp-admin? |
|
|
|
|
|
|
44
|
|
|
*/ |
|
45
|
|
|
|
|
46
|
|
|
/** |
|
47
|
|
|
* Registers actions |
|
48
|
|
|
*/ |
|
49
|
|
|
private function __construct() { |
|
50
|
|
|
// global $concatenate_scripts; |
|
51
|
|
|
// $concatenate_scripts = true; |
|
52
|
|
|
$this->is_first_load = ! isset( $_COOKIE['jetpack_perf_loaded'] ); |
|
|
|
|
|
|
53
|
|
|
$this->remove_remote_fonts = get_option( 'perf_remove_remote_fonts', true ); |
|
54
|
|
|
$this->inline_always = get_option( 'perf_inline_on_every_request', false ); |
|
|
|
|
|
|
55
|
|
|
$this->inline_scripts_and_styles = get_option( 'perf_inline_scripts_and_styles', true ) && ( $this->is_first_load || $this->inline_always ); |
|
56
|
|
|
$this->async_scripts = get_option( 'perf_async_scripts', true ); |
|
57
|
|
|
$this->defer_scripts = get_option( 'perf_defer_scripts', true ); |
|
58
|
|
|
$this->move_scripts_above_css_in_header = true; |
|
|
|
|
|
|
59
|
|
|
$this->remove_core_emojis = true; |
|
|
|
|
|
|
60
|
|
|
$this->prevent_jetpack_implode_css = true; |
|
|
|
|
|
|
61
|
|
|
$this->inject_critical_css = true; |
|
62
|
|
|
$this->preload_scripts = true; |
|
|
|
|
|
|
63
|
|
|
$this->minify_html = false; |
|
64
|
|
|
|
|
65
|
|
|
if ( $this->minify_html ) { |
|
66
|
|
|
require_once dirname( __FILE__ ) . '/class.jetpack-perf-optimize-html.php'; |
|
67
|
|
|
Jetpack_Perf_Optimize_HTML::instance(); |
|
68
|
|
|
} |
|
69
|
|
|
|
|
70
|
|
|
if ( $this->remove_remote_fonts ) { |
|
71
|
|
|
add_filter( 'jetpack_perf_remove_script', array( $this, 'remove_external_font_scripts' ), 10, 3 ); |
|
72
|
|
|
add_filter( 'jetpack_perf_remove_style', array( $this, 'remove_external_font_styles' ), 10, 3 ); |
|
73
|
|
|
} |
|
74
|
|
|
|
|
75
|
|
|
add_action( 'wp_enqueue_scripts', array( $this, 'relocate_assets' ), PHP_INT_MAX ); |
|
76
|
|
|
|
|
77
|
|
|
// relocate assets |
|
78
|
|
|
// add_filter( 'jetpack_perf_style_group', array( $this, 'set_style_groups' ), 10, 2 ); |
|
79
|
|
|
// add_filter( 'jetpack_perf_script_group', array( $this, 'set_script_groups' ), 10, 2 ); |
|
80
|
|
|
|
|
81
|
|
|
if ( $this->inject_critical_css ) { |
|
82
|
|
|
add_action( 'wp_head', array( $this, 'render_critical_css' ), 0 ); |
|
83
|
|
|
} |
|
84
|
|
|
|
|
85
|
|
|
if ( $this->preload_scripts ) { |
|
86
|
|
|
add_action( 'wp_print_scripts', array( $this, 'preload_scripts' ) ); |
|
87
|
|
|
} |
|
88
|
|
|
|
|
89
|
|
|
|
|
90
|
|
|
// munge footer scripts |
|
91
|
|
|
//add_filter( 'wp_footer', array( $this, 'encode_footer_scripts' ), -PHP_INT_MAX ); |
|
92
|
|
|
|
|
93
|
|
|
// necessary to catch some woocommerce scripts that get localized inside wp_print_scripts at pri 5 |
|
94
|
|
|
//add_filter( 'wp_print_footer_scripts', array( $this, 'encode_footer_scripts' ), 9 ); |
|
95
|
|
|
|
|
96
|
|
|
// in modern browsers (post-2008) there is a small performance win from |
|
97
|
|
|
// loading CSS after external scripts in the header, rather than before |
|
98
|
|
|
if ( $this->move_scripts_above_css_in_header ) { |
|
99
|
|
|
add_action( 'init', array( $this, 'move_styles_to_bottom_of_header' ), PHP_INT_MAX ); |
|
100
|
|
|
} |
|
101
|
|
|
|
|
102
|
|
|
if ( $this->prevent_jetpack_implode_css ) { |
|
103
|
|
|
add_filter( 'jetpack_implode_frontend_css', '__return_false' ); |
|
104
|
|
|
} |
|
105
|
|
|
|
|
106
|
|
|
// ensure dashicons is loading inline |
|
107
|
|
|
add_filter( 'jetpack_perf_async_style', function( $should_async, $handle, $src ) { |
|
108
|
|
|
if ( 'dashicons' === $handle ) { |
|
109
|
|
|
return false; |
|
110
|
|
|
} |
|
111
|
|
|
return $should_async; |
|
112
|
|
|
}, 10, 3 ); |
|
113
|
|
|
|
|
114
|
|
|
add_filter( 'jetpack_perf_inline_style', function( $should_inline, $handle, $src ) { |
|
115
|
|
|
if ( 'dashicons' === $handle ) { |
|
116
|
|
|
return true; |
|
117
|
|
|
} |
|
118
|
|
|
return $should_inline; |
|
119
|
|
|
}, 10, 3 ); |
|
120
|
|
|
|
|
121
|
|
|
add_filter( 'script_loader_src', array( $this, 'filter_inline_scripts' ), -100, 2 ); |
|
122
|
|
|
add_filter( 'script_loader_tag', array( $this, 'print_inline_scripts' ), -100, 3 ); |
|
123
|
|
|
add_filter( 'style_loader_src', array( $this, 'filter_inline_styles' ), -100, 2 ); |
|
124
|
|
|
add_filter( 'style_loader_tag', array( $this, 'print_inline_styles' ), -100, 4 ); |
|
125
|
|
|
|
|
126
|
|
|
add_action( 'init', array( $this, 'set_first_load_cookie' ) ); |
|
127
|
|
|
|
|
128
|
|
|
/** |
|
129
|
|
|
* Feature, theme and plugin-specific hacks |
|
130
|
|
|
*/ |
|
131
|
|
|
|
|
132
|
|
|
// remove emoji detection - TODO a setting for this |
|
|
|
|
|
|
133
|
|
|
if ( $this->remove_core_emojis ) { |
|
134
|
|
|
add_action( 'init', array( $this, 'disable_emojis' ) ); |
|
135
|
|
|
} |
|
136
|
|
|
|
|
137
|
|
|
// inline/defer/async stuff for Jetpack |
|
138
|
|
|
add_action( 'init', array( $this, 'optimize_jetpack' ) ); |
|
139
|
|
|
} |
|
140
|
|
|
|
|
141
|
|
|
/** Disabling Emojis **/ |
|
142
|
|
|
// improves page load performance |
|
143
|
|
|
|
|
144
|
|
|
function disable_emojis() { |
|
145
|
|
|
remove_action( 'wp_head', 'print_emoji_detection_script', 7 ); |
|
146
|
|
|
remove_action( 'admin_print_scripts', 'print_emoji_detection_script' ); |
|
147
|
|
|
remove_action( 'embed_head', 'print_emoji_detection_script', 7 ); |
|
148
|
|
|
|
|
149
|
|
|
remove_action( 'wp_print_styles', 'print_emoji_styles' ); |
|
150
|
|
|
remove_action( 'admin_print_styles', 'print_emoji_styles' ); |
|
151
|
|
|
|
|
152
|
|
|
remove_filter( 'the_content_feed', 'wp_staticize_emoji' ); |
|
153
|
|
|
remove_filter( 'comment_text_rss', 'wp_staticize_emoji' ); |
|
154
|
|
|
remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' ); |
|
155
|
|
|
|
|
156
|
|
|
add_filter( 'tiny_mce_plugins', array( $this, 'disable_emojis_tinymce' ) ); |
|
157
|
|
|
add_filter( 'wp_resource_hints', array( $this, 'disable_emojis_remove_dns_prefetch' ), 10, 2 ); |
|
158
|
|
|
} |
|
159
|
|
|
|
|
160
|
|
|
function optimize_jetpack() { |
|
161
|
|
|
|
|
162
|
|
|
} |
|
163
|
|
|
|
|
164
|
|
|
/** |
|
165
|
|
|
* Filter function used to remove the tinymce emoji plugin. |
|
166
|
|
|
* |
|
167
|
|
|
* @param array $plugins |
|
168
|
|
|
* @return array Difference betwen the two arrays |
|
169
|
|
|
*/ |
|
170
|
|
|
function disable_emojis_tinymce( $plugins ) { |
|
171
|
|
|
if ( is_array( $plugins ) ) { |
|
172
|
|
|
return array_diff( $plugins, array( 'wpemoji' ) ); |
|
173
|
|
|
} else { |
|
174
|
|
|
return array(); |
|
175
|
|
|
} |
|
176
|
|
|
} |
|
177
|
|
|
|
|
178
|
|
|
/** |
|
179
|
|
|
* Remove emoji CDN hostname from DNS prefetching hints. |
|
180
|
|
|
* |
|
181
|
|
|
* @param array $urls URLs to print for resource hints. |
|
182
|
|
|
* @param string $relation_type The relation type the URLs are printed for. |
|
183
|
|
|
* @return array Difference betwen the two arrays. |
|
184
|
|
|
*/ |
|
185
|
|
|
function disable_emojis_remove_dns_prefetch( $urls, $relation_type ) { |
|
186
|
|
|
if ( 'dns-prefetch' == $relation_type ) { |
|
187
|
|
|
/** This filter is documented in wp-includes/formatting.php */ |
|
188
|
|
|
$emoji_svg_url = apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/2/svg/' ); |
|
189
|
|
|
|
|
190
|
|
|
$urls = array_diff( $urls, array( $emoji_svg_url ) ); |
|
191
|
|
|
} |
|
192
|
|
|
|
|
193
|
|
|
return $urls; |
|
194
|
|
|
} |
|
195
|
|
|
|
|
196
|
|
|
// preload scripts we expect to find in the footer |
|
197
|
|
|
function preload_scripts() { |
|
198
|
|
|
global $wp_scripts; |
|
199
|
|
|
$wp_scripts->all_deps( $wp_scripts->queue, false ); |
|
200
|
|
|
foreach( $wp_scripts->to_do as $handle ) { |
|
201
|
|
|
$registration = $wp_scripts->registered[$handle]; |
|
202
|
|
|
// preload anything not async'd, since these scripts are likely to be a higher priority |
|
203
|
|
|
$is_footer_script = isset( $registration->extra['group'] ) && 1 == $registration->extra['group']; |
|
204
|
|
|
// TODO: this doesn't currently affect any scripts - will it ever? |
|
|
|
|
|
|
205
|
|
|
if ( ! $this->should_async_script( $registration ) && $is_footer_script && ! $this->should_inline_script( $registration ) ) { |
|
206
|
|
|
echo '<link rel="preload" as="script" href="'. esc_attr( $registration->src ) .'" />'; |
|
207
|
|
|
} |
|
208
|
|
|
} |
|
209
|
|
|
} |
|
210
|
|
|
|
|
211
|
|
|
function render_critical_css() { |
|
212
|
|
|
echo '<!-- critical.css --><style type="text/css">' . file_get_contents( plugin_dir_path( __FILE__ ) . 'critical.css' ) . '</style>'; |
|
213
|
|
|
} |
|
214
|
|
|
|
|
215
|
|
|
// by default we only inline scripts+styles on first page load for a given user |
|
216
|
|
|
function set_first_load_cookie() { |
|
217
|
|
View Code Duplication |
if ( ! isset( $_COOKIE['jetpack_perf_loaded'] ) ) { |
|
218
|
|
|
setcookie( 'jetpack_perf_loaded', '1', time() + YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN ); |
|
219
|
|
|
} |
|
220
|
|
|
} |
|
221
|
|
|
|
|
222
|
|
|
// this code essentially sets the default asset location to the footer rather than the head |
|
223
|
|
|
function relocate_assets() { |
|
224
|
|
|
global $wp_scripts; |
|
225
|
|
|
|
|
226
|
|
|
//error_log(print_r($wp_scripts,1)); |
|
227
|
|
|
|
|
228
|
|
|
// fetch all deps for head |
|
229
|
|
|
$wp_scripts->all_deps( $wp_scripts->queue, false ); |
|
230
|
|
View Code Duplication |
foreach( $wp_scripts->to_do as $handle ) { |
|
231
|
|
|
$registration = $wp_scripts->registered[$handle]; |
|
232
|
|
|
$asset_group = apply_filters( 'jetpack_perf_script_group', $registration->args, $handle ); |
|
233
|
|
|
|
|
234
|
|
|
if ( $asset_group !== $registration->args ) { |
|
235
|
|
|
$registration->args = $asset_group; |
|
236
|
|
|
$wp_scripts->groups[$handle] = $asset_group; |
|
237
|
|
|
} |
|
238
|
|
|
} |
|
239
|
|
|
|
|
240
|
|
|
//$wp_scripts->done = array(); |
|
241
|
|
|
|
|
242
|
|
|
global $wp_styles; |
|
243
|
|
|
|
|
244
|
|
|
// fetch all deps for head |
|
245
|
|
|
$wp_styles->all_deps( $wp_styles->queue, false,1 ); |
|
246
|
|
View Code Duplication |
foreach( $wp_styles->to_do as $handle ) { |
|
247
|
|
|
$registration = $wp_styles->registered[$handle]; |
|
248
|
|
|
$asset_group = apply_filters( 'jetpack_perf_style_group', $wp_styles->groups[$handle], $handle ); |
|
249
|
|
|
|
|
250
|
|
|
if ( $asset_group !== $wp_styles->groups[$handle] ) { |
|
251
|
|
|
$registration->args = $asset_group; |
|
252
|
|
|
$wp_styles->groups[$handle] = $asset_group; |
|
253
|
|
|
} |
|
254
|
|
|
} |
|
255
|
|
|
|
|
256
|
|
|
} |
|
257
|
|
|
|
|
258
|
|
|
// scripts that run after CSS <link>s in the header block waiting for the CSS to load |
|
259
|
|
|
// so we move styles as late as possible in the wp_head action to maximise the chance |
|
260
|
|
|
// of non-blocking rendering |
|
261
|
|
|
function move_styles_to_bottom_of_header() { |
|
262
|
|
|
remove_action( 'wp_head', 'wp_print_styles', 8 ); |
|
263
|
|
|
add_action( 'wp_head', 'wp_print_styles', 999 ); |
|
264
|
|
|
} |
|
265
|
|
|
|
|
266
|
|
|
function set_script_groups( $group, $handle ) { |
|
267
|
|
|
return $group; |
|
268
|
|
|
// move everything to the footer |
|
269
|
|
|
//error_log("set script for $handle in group $group"); |
|
270
|
|
|
// force jquery into header, everything else can go in footer unless filtered elsewhere |
|
271
|
|
|
if ( in_array( $handle, array( 'jquery-core', 'jquery-migrate', 'jquery' ) ) ) { |
|
|
|
|
|
|
272
|
|
|
return 0; |
|
273
|
|
|
} |
|
274
|
|
|
|
|
275
|
|
|
// force scripts with deps into header |
|
276
|
|
|
if ( $this->script_has_deps( $handle ) ) { |
|
277
|
|
|
return 0; |
|
278
|
|
|
} |
|
279
|
|
|
|
|
280
|
|
|
if ( $group === NULL ) { |
|
281
|
|
|
// error_log("force set $handle to 0"); |
|
282
|
|
|
// set default location to header |
|
283
|
|
|
return 1; |
|
284
|
|
|
} |
|
285
|
|
|
|
|
286
|
|
|
//error_log("set $handle to $group"); |
|
287
|
|
|
|
|
288
|
|
|
return $group; |
|
289
|
|
|
} |
|
290
|
|
|
|
|
291
|
|
|
function set_style_groups( $group, $handle ) { |
|
292
|
|
|
if ( in_array( $handle, array( 'genericons' ) ) ) { |
|
293
|
|
|
return 0; |
|
294
|
|
|
} |
|
295
|
|
|
|
|
296
|
|
|
if ( $group === NULL ) { |
|
297
|
|
|
return 1; |
|
298
|
|
|
} |
|
299
|
|
|
|
|
300
|
|
|
return $group; |
|
301
|
|
|
} |
|
302
|
|
|
|
|
303
|
|
|
// this is wild: inline scripts in the footer can block rendering, but we don't have a chance to intercept them in the header |
|
304
|
|
|
// so let's mark them as defer (which guarantees order) - which also requires adding deps with the localize script base64-encoded |
|
305
|
|
|
|
|
306
|
|
|
// so, I don't think this is a performance win - stuff in the footer is already "deferred" and forcing the defer attribute |
|
307
|
|
|
// only makes them load one after the other, rather than allowing the browser to do paralellisation |
|
308
|
|
|
|
|
309
|
|
|
// we're better off concatenating |
|
310
|
|
|
function encode_footer_scripts() { |
|
311
|
|
|
global $wp_scripts; |
|
312
|
|
|
$queued = $wp_scripts->all_deps( $wp_scripts->queue, false ); |
|
|
|
|
|
|
313
|
|
|
|
|
314
|
|
|
foreach( $wp_scripts->to_do as $handle ) { |
|
315
|
|
|
$registration = $wp_scripts->registered[$handle]; |
|
316
|
|
|
//error_log(print_r($registration,1)); |
|
317
|
|
|
if ( isset( $registration->extra['data'] ) && $registration->extra['data'] ) { |
|
318
|
|
|
//register artificial dependency with param of defer |
|
319
|
|
|
$encoded_src = 'data:text/javascript;base64,' . base64_encode( $registration->extra['data'] ); |
|
320
|
|
|
$data_handle = $handle . '_jp_data'; |
|
321
|
|
|
$wp_scripts->add( $data_handle, $encoded_src, array(), false ); |
|
322
|
|
|
$wp_scripts->add_data( $data_handle, 'jetpack-defer', true ); |
|
323
|
|
|
$registration->deps[] = $data_handle; |
|
324
|
|
|
unset( $registration->extra['data'] ); |
|
325
|
|
|
} |
|
326
|
|
|
|
|
327
|
|
|
$registration->extra['jetpack-defer'] = true; |
|
328
|
|
|
$registration->extra['jetpack-async'] = false; |
|
329
|
|
|
} |
|
330
|
|
|
$wp_scripts->to_do = array(); |
|
331
|
|
|
} |
|
332
|
|
|
|
|
333
|
|
|
/** FILTERS **/ |
|
334
|
|
|
public function remove_external_font_scripts( $should_remove, $handle, $asset_url ) { |
|
335
|
|
|
$font_script_url = 'http://use.typekit.com/'; |
|
336
|
|
|
return strncmp( $asset_url, $font_script_url, strlen( $font_script_url ) ) === 0; |
|
337
|
|
|
} |
|
338
|
|
|
|
|
339
|
|
|
public function remove_external_font_styles( $should_remove, $handle, $asset_url ) { |
|
340
|
|
|
$font_url = 'https://fonts.googleapis.com'; |
|
341
|
|
|
return strncmp( $asset_url, $font_url, strlen( $font_url ) ) === 0; |
|
342
|
|
|
} |
|
343
|
|
|
|
|
344
|
|
|
/** SCRIPTS **/ |
|
345
|
|
View Code Duplication |
public function filter_inline_scripts( $src, $handle ) { |
|
346
|
|
|
global $wp_scripts; |
|
347
|
|
|
|
|
348
|
|
|
if ( is_admin() || ! isset( $wp_scripts->registered[$handle] ) ) { |
|
349
|
|
|
return $src; |
|
350
|
|
|
} |
|
351
|
|
|
|
|
352
|
|
|
$script = $wp_scripts->registered[$handle]; |
|
353
|
|
|
|
|
354
|
|
|
// reset src to empty - can't return empty string though because then it skips rendering the tag |
|
355
|
|
|
if ( $this->should_inline_script( $script ) ) { |
|
356
|
|
|
return '#'; |
|
357
|
|
|
} |
|
358
|
|
|
|
|
359
|
|
|
return $src; |
|
360
|
|
|
} |
|
361
|
|
|
|
|
362
|
|
|
public function print_inline_scripts( $tag, $handle, $src ) { |
|
363
|
|
|
global $wp_scripts; |
|
364
|
|
|
|
|
365
|
|
|
if ( is_admin() || ! isset( $wp_scripts->registered[$handle] ) ) { |
|
366
|
|
|
return $tag; |
|
367
|
|
|
} |
|
368
|
|
|
|
|
369
|
|
|
$script = $wp_scripts->registered[$handle]; |
|
370
|
|
|
|
|
371
|
|
|
if ( $this->should_remove_script( $script ) ) { |
|
372
|
|
|
return ''; |
|
373
|
|
|
} |
|
374
|
|
|
|
|
375
|
|
|
if ( $this->should_inline_script( $script ) ) { |
|
376
|
|
|
$label = '<!-- ' . $script->src . ' -->'; |
|
377
|
|
|
// base64-encoding a script into the src URL only makes sense if we intend to async or defer it |
|
378
|
|
|
if ( $this->should_defer_script( $script ) ) { |
|
379
|
|
|
$tag = $label . '<script defer type="text/javascript" src="data:text/javascript;base64,' . base64_encode( file_get_contents( $script->extra['jetpack-inline-file'] ) ) . '"></script>'; |
|
380
|
|
|
} elseif ( $this->should_async_script( $script ) ) { |
|
381
|
|
|
$tag = $label . '<script async type="text/javascript" src="data:text/javascript;base64,' . base64_encode( file_get_contents( $script->extra['jetpack-inline-file'] ) ) . '"></script>'; |
|
382
|
|
|
} else { |
|
383
|
|
|
$tag = $label . '<script type="text/javascript">' . file_get_contents( $script->extra['jetpack-inline-file'] ) . '</script>'; |
|
384
|
|
|
} |
|
385
|
|
|
} else { |
|
386
|
|
|
if ( $this->should_defer_script( $script ) ) { |
|
387
|
|
|
$tag = preg_replace( '/<script /', '<script defer ', $tag ); |
|
388
|
|
|
} elseif ( $this->should_async_script( $script ) ) { |
|
389
|
|
|
$tag = preg_replace( '/<script /', '<script async ', $tag ); |
|
390
|
|
|
} |
|
391
|
|
|
} |
|
392
|
|
|
|
|
393
|
|
|
return $tag; |
|
394
|
|
|
} |
|
395
|
|
|
|
|
396
|
|
|
private function should_async_script( $script ) { |
|
397
|
|
|
// this could be dangerous if scripts have undeclared dependencies |
|
398
|
|
|
// only make scripts async if nothing depends on them |
|
399
|
|
|
// turns out this is a problem - lots of plugins import (say) jquery extensions and then use them in the page from inline scripts. Bah. |
|
400
|
|
|
// but if a script has been declared in the footer? hm maybe that's ok........ |
|
401
|
|
|
$should_async_script = ! $this->script_has_deps( $script->handle ) && isset( $script->extra['group'] ) && $script->extra['group'] === 1; |
|
402
|
|
|
|
|
403
|
|
|
// you can override this logic by setting jetpack-async |
|
404
|
|
|
$should_async_script = $should_async_script || ( isset( $script->extra['jetpack-async'] ) && $script->extra['jetpack-async'] ); |
|
405
|
|
|
return $this->async_scripts && apply_filters( 'jetpack_perf_async_script', $should_async_script, $script->handle, $script->src ); |
|
406
|
|
|
} |
|
407
|
|
|
|
|
408
|
|
|
private function script_has_deps( $handle ) { |
|
409
|
|
|
global $wp_scripts; |
|
410
|
|
View Code Duplication |
foreach ( $wp_scripts->to_do as $other_script_handle ) { |
|
411
|
|
|
$other_script = $wp_scripts->registered[ $other_script_handle ]; |
|
412
|
|
|
if ( in_array( $handle, $other_script->deps ) ) { |
|
413
|
|
|
return true; |
|
414
|
|
|
} |
|
415
|
|
|
} |
|
416
|
|
|
|
|
417
|
|
|
return false; |
|
418
|
|
|
} |
|
419
|
|
|
|
|
420
|
|
|
private function should_defer_script( $script ) { |
|
421
|
|
|
global $wp_scripts; |
|
422
|
|
|
|
|
423
|
|
|
// if it's explicitly not in the footer, or we have Jetpack Defer set, and has no dependencies |
|
424
|
|
|
$should_defer_script = $script->args === 0; |
|
425
|
|
|
|
|
426
|
|
|
// only make scripts deferred if nothing depends on them |
|
427
|
|
View Code Duplication |
foreach ( $wp_scripts->to_do as $other_script_handle ) { |
|
428
|
|
|
$other_script = $wp_scripts->registered[ $other_script_handle ]; |
|
429
|
|
|
if ( in_array( $script->handle, $other_script->deps ) ) { |
|
430
|
|
|
$should_defer_script = false; |
|
431
|
|
|
break; |
|
432
|
|
|
} |
|
433
|
|
|
} |
|
434
|
|
|
|
|
435
|
|
|
$should_defer_script = $should_defer_script || ( isset( $script->extra['jetpack-defer'] ) && $script->extra['jetpack-defer'] ); |
|
436
|
|
|
return $this->defer_scripts && apply_filters( 'jetpack_perf_defer_script', $should_defer_script, $script->handle, $script->src ); |
|
437
|
|
|
} |
|
438
|
|
|
|
|
439
|
|
|
private function should_remove_script( $script ) { |
|
440
|
|
|
return $this->should_remove_asset( 'jetpack_perf_remove_script', $script ); |
|
441
|
|
|
} |
|
442
|
|
|
|
|
443
|
|
|
private function should_inline_script( $script ) { |
|
444
|
|
|
return $this->inline_scripts_and_styles && $this->should_inline_asset( 'jetpack_perf_inline_script', $script ); |
|
445
|
|
|
} |
|
446
|
|
|
|
|
447
|
|
|
/** STYLES **/ |
|
448
|
|
View Code Duplication |
public function filter_inline_styles( $src, $handle ) { |
|
449
|
|
|
global $wp_scripts; |
|
450
|
|
|
|
|
451
|
|
|
if ( is_admin() || ! isset( $wp_scripts->registered[$handle] ) ) { |
|
452
|
|
|
return $src; |
|
453
|
|
|
} |
|
454
|
|
|
|
|
455
|
|
|
$style = $wp_scripts->registered[$handle]; |
|
456
|
|
|
|
|
457
|
|
|
if ( $this->should_inline_style( $style ) ) { |
|
458
|
|
|
return '#'; |
|
459
|
|
|
} |
|
460
|
|
|
|
|
461
|
|
|
return $src; |
|
462
|
|
|
} |
|
463
|
|
|
|
|
464
|
|
|
public function print_inline_styles( $tag, $handle, $href, $media ) { |
|
465
|
|
|
global $wp_styles; |
|
466
|
|
|
|
|
467
|
|
|
if ( is_admin() || ! isset( $wp_styles->registered[$handle] ) ) { |
|
468
|
|
|
return $tag; |
|
469
|
|
|
} |
|
470
|
|
|
|
|
471
|
|
|
$style = $wp_styles->registered[$handle]; |
|
472
|
|
|
|
|
473
|
|
|
// async styles use the new(-ish) preload syntax - should only be done if |
|
474
|
|
|
// critical CSS is enabled, since otherwise we'll end up with flash of unstyled content (FOUC) |
|
475
|
|
|
if ( $this->should_async_style( $style ) ) { |
|
476
|
|
|
// we async all styles if inline-critical-css is enabled |
|
477
|
|
|
$existing_tag = $tag; |
|
478
|
|
|
$tag = preg_replace( '/rel=[\'"]stylesheet[\'"]/', 'rel="preload"', $tag ); |
|
479
|
|
|
$tag = preg_replace( '/<link /', '<link onload="this.rel=\'stylesheet\'" as="style" ', $tag ); |
|
480
|
|
|
$tag .= '<noscript>' . $existing_tag . '</noscript>'; |
|
481
|
|
|
return $tag; |
|
482
|
|
|
} |
|
483
|
|
|
|
|
484
|
|
|
if ( $this->should_inline_style( $style ) ) { |
|
485
|
|
|
$label = '<!-- ' . $style->src . ' -->'; |
|
486
|
|
|
$css = $this->fix_css_urls( file_get_contents( $style->extra['jetpack-inline-file'] ), $style->src ); |
|
487
|
|
|
return "$label<style type='text/css' media='$media'>$css</style>"; |
|
488
|
|
|
} |
|
489
|
|
|
|
|
490
|
|
|
if ( $this->should_remove_style( $style ) ) { |
|
491
|
|
|
return ''; |
|
492
|
|
|
} |
|
493
|
|
|
|
|
494
|
|
|
return $tag; |
|
495
|
|
|
} |
|
496
|
|
|
|
|
497
|
|
|
// we can async styles if we load critical CSS in the header |
|
498
|
|
|
private function should_async_style( $style ) { |
|
499
|
|
|
return apply_filters( 'jetpack_perf_async_style', $this->inject_critical_css, $style->handle, $style->src ); |
|
500
|
|
|
} |
|
501
|
|
|
|
|
502
|
|
|
// for CSS urls()s, replace with base64-encoded content if smaller than a certain size |
|
503
|
|
|
public function fix_css_urls( $css, $css_url ) { |
|
504
|
|
|
$base = trailingslashit( dirname( $css_url ) ); |
|
505
|
|
|
$base = str_replace( site_url(), '', $base ); |
|
506
|
|
|
|
|
507
|
|
|
// reject absolute site_url |
|
508
|
|
|
if ( 'http' === substr( $base, 0, 4 ) ) { |
|
509
|
|
|
return $css; |
|
510
|
|
|
} |
|
511
|
|
|
|
|
512
|
|
|
return preg_replace_callback( '/url[\s]*\([\s]*["\']?[\s]*(?!https?:\/\/)(?!data:)(?!#)([^\)"\']*)["\']?\)/i', function( $matches ) use ( $base ) { |
|
513
|
|
|
// TODO: embed data-encoded file, for files smaller than certain size? |
|
|
|
|
|
|
514
|
|
|
$url = $this->rel2abspath( $matches[1], $base ); |
|
515
|
|
|
|
|
516
|
|
|
// sneaky - see if it's small enough that it should be encoded and placed inline |
|
517
|
|
|
$local_path = $this->local_url_to_file_path( $url ); |
|
518
|
|
|
if ( file_exists( $local_path ) && filesize( $local_path ) < self::INLINE_CSS_URL_MAX_SIZE_BYTES && ( $mime_type = wp_check_filetype( $url )['type'] ) ) { |
|
519
|
|
|
$url = 'data:' . $mime_type . ';base64,' . base64_encode( file_get_contents( $local_path ) ); |
|
520
|
|
|
} |
|
521
|
|
|
|
|
522
|
|
|
return 'url('.$url.')'; |
|
523
|
|
|
}, $css ); |
|
524
|
|
|
} |
|
525
|
|
|
|
|
526
|
|
|
// see: http://stackoverflow.com/questions/4444475/transfrom-relative-path-into-absolute-url-using-php |
|
527
|
|
|
private function rel2abspath( $rel, $path) { |
|
528
|
|
|
/* remove non-directory element from path */ |
|
529
|
|
|
$path = preg_replace( '#/[^/]*$#', '', $path ); |
|
530
|
|
|
|
|
531
|
|
|
/* destroy path if relative url points to root */ |
|
532
|
|
|
if( $rel[0] == '/' ) |
|
533
|
|
|
$path = ''; |
|
534
|
|
|
|
|
535
|
|
|
/* dirty absolute URL */ |
|
536
|
|
|
$abs = ''; |
|
537
|
|
|
|
|
538
|
|
|
$abs .= $path . '/' . $rel; |
|
539
|
|
|
|
|
540
|
|
|
/* replace '//' or '/./' or '/foo/../' with '/' */ |
|
541
|
|
|
$re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#'); |
|
542
|
|
|
for( $n=1; $n>0; $abs = preg_replace( $re, '/', $abs, -1, $n ) ) {} |
|
|
|
|
|
|
543
|
|
|
|
|
544
|
|
|
/* absolute path is ready! */ |
|
545
|
|
|
return $abs; |
|
546
|
|
|
} |
|
547
|
|
|
|
|
548
|
|
|
private function should_inline_style( $style ) { |
|
549
|
|
|
return $this->inline_scripts_and_styles && $this->should_inline_asset( 'jetpack_perf_inline_style', $style ); |
|
550
|
|
|
} |
|
551
|
|
|
|
|
552
|
|
|
private function should_remove_style( $style ) { |
|
553
|
|
|
return $this->should_remove_asset( 'jetpack_perf_remove_style', $style ); |
|
554
|
|
|
} |
|
555
|
|
|
|
|
556
|
|
|
/** shared code **/ |
|
557
|
|
|
|
|
558
|
|
|
private function should_inline_asset( $filter, $dependency ) { |
|
559
|
|
|
// inline anything local, with a src starting with /, or starting with site_url |
|
560
|
|
|
$site_url = site_url(); |
|
561
|
|
|
|
|
562
|
|
|
$is_local_url = ( strncmp( $dependency->src, '/', 1 ) === 0 && strncmp( $dependency->src, '//', 2 ) !== 0 ) |
|
563
|
|
|
|| strpos( $dependency->src, $site_url ) === 0; |
|
564
|
|
|
|
|
565
|
|
|
if ( $is_local_url && ! isset( $dependency->extra['jetpack-inline'] ) ) { |
|
566
|
|
|
$dependency->extra['jetpack-inline'] = true; |
|
567
|
|
|
$dependency->extra['jetpack-inline-file'] = $this->local_url_to_file_path( $dependency->src ); |
|
568
|
|
|
} |
|
569
|
|
|
|
|
570
|
|
|
// early exit if the file doesn't exist or is too large |
|
571
|
|
|
if ( ! isset( $dependency->extra['jetpack-inline-file'] ) || ! file_exists( $dependency->extra['jetpack-inline-file'] ) ) { |
|
572
|
|
|
return false; |
|
573
|
|
|
} |
|
574
|
|
|
|
|
575
|
|
|
// only inline if we don't have a conditional |
|
576
|
|
|
$should_inline = ! isset( $dependency->extra['conditional'] ) |
|
577
|
|
|
&& isset( $dependency->extra['jetpack-inline'] ) |
|
578
|
|
|
&& $dependency->extra['jetpack-inline'] |
|
579
|
|
|
&& filesize( $dependency->extra['jetpack-inline-file'] ) < self::INLINE_ASSET_MAX_SIZE_BYTES; |
|
580
|
|
|
|
|
581
|
|
|
return apply_filters( $filter, $should_inline, $dependency->handle, $dependency->src ); |
|
582
|
|
|
} |
|
583
|
|
|
|
|
584
|
|
|
private function local_url_to_file_path( $url ) { |
|
585
|
|
|
$path = untrailingslashit( ABSPATH ) . parse_url( $url )['path']; |
|
586
|
|
|
if ( '/' !== DIRECTORY_SEPARATOR ) |
|
587
|
|
|
$path = str_replace( '/', DIRECTORY_SEPARATOR, $path ); |
|
588
|
|
|
return $path; |
|
589
|
|
|
} |
|
590
|
|
|
|
|
591
|
|
|
private function should_remove_asset( $filter, $dependency ) { |
|
592
|
|
|
return apply_filters( $filter, false, $dependency->handle, $dependency->src ); |
|
593
|
|
|
} |
|
594
|
|
|
|
|
595
|
|
|
/** |
|
596
|
|
|
* if inline assets are enabled, renders inline |
|
597
|
|
|
* TODO: enable this just for certain paths/patterns/filetypes |
|
|
|
|
|
|
598
|
|
|
* This is actually currently unused |
|
599
|
|
|
*/ |
|
600
|
|
|
public function register_inline_script( $handle, $file, $plugin_file, $deps = false, $ver = false, $in_footer = false ) { |
|
601
|
|
|
$registered = wp_register_script( $handle, plugins_url( $file, $plugin_file ), $deps, $ver, $in_footer ); |
|
602
|
|
|
|
|
603
|
|
View Code Duplication |
if ( $registered ) { |
|
604
|
|
|
$file_full_path = dirname( $plugin_file ) . '/' . $file; |
|
605
|
|
|
wp_script_add_data( $handle, 'jetpack-inline', true ); |
|
606
|
|
|
wp_script_add_data( $handle, 'jetpack-inline-file', $file_full_path ); |
|
607
|
|
|
} |
|
608
|
|
|
|
|
609
|
|
|
return $registered; |
|
610
|
|
|
} |
|
611
|
|
|
|
|
612
|
|
|
/** |
|
613
|
|
|
* if inline assets are enabled, renders inline |
|
614
|
|
|
* TODO: enable this just for certain paths/patterns/filetypes |
|
|
|
|
|
|
615
|
|
|
* This is actually currently unused |
|
616
|
|
|
*/ |
|
617
|
|
|
public function register_inline_style( $handle, $file, $plugin_file, $deps = array(), $ver = false, $media = 'all' ) { |
|
618
|
|
|
$registered = wp_register_style( $handle, plugins_url( $file, $plugin_file ), $deps, $ver, $media ); |
|
619
|
|
|
|
|
620
|
|
View Code Duplication |
if ( $registered ) { |
|
621
|
|
|
$file_full_path = dirname( $plugin_file ) . '/' . $file; |
|
622
|
|
|
wp_style_add_data( $handle, 'jetpack-inline', true ); |
|
623
|
|
|
wp_style_add_data( $handle, 'jetpack-inline-file', $file_full_path ); |
|
624
|
|
|
} |
|
625
|
|
|
} |
|
626
|
|
|
} |
|
627
|
|
|
|
Automattic /
jetpack
Loading history...
