← All changes | media-optimization/class-smart-lazy-loader.php +46 -6 2.6.19 → 2.7.2 View file →

		@@ -14,9 +14,8 @@
14	14
15	15	class Metasync_Smart_Lazy_Loader {
16	16
17	17	private array $settings;
18		- private int $img_counter = 0;
19	18
20	19	public function __construct(array $settings) {
21	20	$this->settings = $settings;
22	21
		@@ -33,9 +32,9 @@
33	32	/**
34	33	* Process HTML content to add/manage lazy loading attributes.
35	34	*/
36	35	public function process_content(string $content): string {
37		- if (empty($content) || is_admin() || is_feed()) {
	36	+ if (empty($content) || is_admin() || is_feed() || $this->is_amp_request()) {
38	37	return $content;
39	38	}
40	39
41	40	$content = $this->process_images($content);
		@@ -53,11 +52,17 @@
53	52	private function process_images(string $content): string {
54	53	$skip = (int) ($this->settings['lcp_skip_count'] ?? 2);
55	54	$exclude_classes = array_filter(array_map('trim', explode(',', $this->settings['exclude_classes'] ?? '')));
56	55
57		- return preg_replace_callback('/<img\s[^>]+>/i', function ($matches) use ($skip, $exclude_classes) {
	56	+ // The LCP budget is scoped to a single content block (the same
	57	+ // semantics as core's wp_omit_loading_attr_threshold): an
	58	+ // instance-wide counter shared across the_content, thumbnails, and
	59	+ // widgets counted tags in filter-execution order, not document
	60	+ // order, so the hero could still end up lazy-loaded.
	61	+ $position = 0;
	62	+
	63	+ return preg_replace_callback('/<img\s[^>]+>/i', function ($matches) use ($skip, $exclude_classes, &$position) {
58	64	$tag = $matches[0];
59		- $this->img_counter++;
60	65
61	66	// Already has a loading attribute - don't touch it
62	67	if (preg_match('/\sloading\s*=/i', $tag)) {
63	68	return $tag;
		@@ -72,10 +77,14 @@
72	77	}
73	78	}
74	79	}
75	80
	81	+ // Only images this filter actually modifies consume the budget;
	82	+ // already-lazy and excluded tags above must not.
	83	+ $position++;
	84	+
76	85	// Skip first N images to protect LCP
77		- if ($this->img_counter <= $skip) {
	86	+ if ($position <= $skip) {
78	87	return $this->inject_attribute($tag, 'loading', 'eager');
79	88	}
80	89
81	90	// Add loading="lazy" and decoding="async" for below-fold images
		@@ -89,9 +98,15 @@
89	98	/**
90	99	* Add loading="lazy" to <iframe> tags.
91	100	*/
92	101	private function process_iframes(string $content): string {
93		- return preg_replace_callback('/<iframe\s[^>]*>/i', function ($matches) {
	102	+ // Same skip semantics as images: the first N iframes (typically
	103	+ // above-fold embeds — a hero map or video) stay eager instead of
	104	+ // being lazy-loaded unconditionally.
	105	+ $skip = (int) ($this->settings['lcp_skip_count'] ?? 2);
	106	+ $position = 0;
	107	+
	108	+ return preg_replace_callback('/<iframe\s[^>]*>/i', function ($matches) use ($skip, &$position) {
94	109	$tag = $matches[0];
95	110
96	111	if (preg_match('/\sloading\s*=/i', $tag)) {
97	112	return $tag;
		@@ -96,10 +111,35 @@
96	111	if (preg_match('/\sloading\s*=/i', $tag)) {
97	112	return $tag;
98	113	}
99	114
	115	+ $position++;
	116	+ if ($position <= $skip) {
	117	+ return $this->inject_attribute($tag, 'loading', 'eager');
	118	+ }
	119	+
100	120	return $this->inject_attribute($tag, 'loading', 'lazy');
101	121	}, $content);
	122	+ }
	123	+
	124	+ /**
	125	+ * True when the current request renders an AMP page. The AMP runtime
	126	+ * manages its own loading strategy and rejects foreign attributes, so
	127	+ * this filter is skipped there. The helper indirection keeps static
	128	+ * analysis from assuming the AMP plugin's functions always exist.
	129	+ */
	130	+ private function is_amp_request(): bool {
	131	+ if (self::func_is_available('amp_is_request')) {
	132	+ return (bool) amp_is_request();
	133	+ }
	134	+ if (self::func_is_available('is_amp_endpoint')) {
	135	+ return (bool) is_amp_endpoint();
	136	+ }
	137	+ return false;
	138	+ }
	139	+
	140	+ private static function func_is_available(string $function): bool {
	141	+ return function_exists($function);
102	142	}
103	143
104	144	/**
105	145	* Inject an HTML attribute into a tag if not already present.