Dome/Zeitfresser-Wordpress-Theme
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Dome
2026-04-26 04:06:01 +02:00
parent 787cdb31aa
commit 001390457b
63 changed files with 924 additions and 2152 deletions
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functions.php
+325 -419
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@@ -4,34 +4,63 @@
*
* @package zeitfresser
*/
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
/**
* ------------------------------------------------------------------------
* Theme Constants
* ------------------------------------------------------------------------
*/
if ( ! defined( 'ZEITFRESSER_VERSION' ) ) {
define( 'ZEITFRESSER_VERSION', '2.3.6' );
}
if ( ! defined( 'DAISY_BLOG_VERSION' ) ) {
define( 'DAISY_BLOG_VERSION', ZEITFRESSER_VERSION );
}
if ( ! defined( 'ZEITFRESSER_IMAGE_OPTIMIZATION_VERSION' ) ) {
define( 'ZEITFRESSER_IMAGE_OPTIMIZATION_VERSION', '1.0' );
}
require get_template_directory() . '/inc/zeitfresser-helpers.php';
require get_template_directory() . '/inc/performance-tools.php';
/**
* ------------------------------------------------------------------------
* Core Modules
* ------------------------------------------------------------------------
*/
// Helpers (foundation)
require get_template_directory() . '/inc/helpers/zeitfresser-helpers.php';
// Theme logic
require get_template_directory() . '/inc/zeitfresser-toc.php';
/**
* Upload Handler
*/
add_filter('wp_handle_upload', 'zeitfresser_capture_original_upload', 10, 2);
// Performance layer
require get_template_directory() . '/inc/performance/performance-tools.php';
/**
* Capture original upload path safely
* ------------------------------------------------------------------------
* Customizer (modular)
* ------------------------------------------------------------------------
*/
require get_template_directory() . '/inc/customizer/core.php';
require get_template_directory() . '/inc/customizer/general.php';
require get_template_directory() . '/inc/customizer/layout.php';
require get_template_directory() . '/inc/customizer/toc.php';
require get_template_directory() . '/inc/customizer/social.php';
/**
* ------------------------------------------------------------------------
* Theme Utilities
* ------------------------------------------------------------------------
*/
require get_template_directory() . '/inc/template-tags.php';
require get_template_directory() . '/inc/template-functions.php';
require get_template_directory() . '/inc/pagination.php';
/**
* ------------------------------------------------------------------------
* Upload Handling (Original File Tracking)
* ------------------------------------------------------------------------
*/
function zeitfresser_capture_original_upload( $upload, $context ) {
@@ -80,69 +109,64 @@ function zeitfresser_store_original_file( $attachment_id ) {
add_action( 'add_attachment', 'zeitfresser_store_original_file' );
/**
* Theme setup.
*
* @return void
* ------------------------------------------------------------------------
* Theme Setup
* ------------------------------------------------------------------------
*/
function zeitfresser_setup() {
load_theme_textdomain( 'zeitfresser', get_template_directory() . '/languages' );
add_theme_support( 'automatic-feed-links' );
add_theme_support( 'title-tag' );
add_theme_support( 'post-thumbnails' );
add_theme_support(
'html5',
array(
'search-form',
'comment-form',
'comment-list',
'gallery',
'caption',
'style',
'script',
)
);
add_theme_support( 'html5', array(
'search-form',
'comment-form',
'comment-list',
'gallery',
'caption',
'style',
'script',
));
add_theme_support( 'customize-selective-refresh-widgets' );
add_theme_support(
'custom-logo',
array(
'height' => 250,
'width' => 250,
'flex-width' => true,
'flex-height' => true,
)
);
add_theme_support( 'custom-logo', array(
'height' => 250,
'width' => 250,
'flex-width' => true,
'flex-height' => true,
));
add_theme_support( 'align-wide' );
add_theme_support( 'wp-block-styles' );
add_theme_support( 'responsive-embeds' );
register_nav_menus(
array(
'menu-1' => esc_html__( 'Primary', 'zeitfresser' ),
)
);
register_nav_menus( array(
'menu-1' => esc_html__( 'Primary', 'zeitfresser' ),
));
add_editor_style( 'editor-style.css' );
}
add_action( 'after_setup_theme', 'zeitfresser_setup' );
/**
* Register optimized image sizes
* ------------------------------------------------------------------------
* Image Sizes
* ------------------------------------------------------------------------
*/
function zeitfresser_custom_image_sizes() {
// Content images (main article)
add_image_size( 'zeitfresser-content', 720, 0, false );
// Archive / card layout
add_image_size( 'zeitfresser-card', 480, 0, false );
}
add_action( 'after_setup_theme', 'zeitfresser_custom_image_sizes' );
/**
* Set the content width in pixels.
*
* @return void
* ------------------------------------------------------------------------
* Content Width
* ------------------------------------------------------------------------
*/
function zeitfresser_content_width() {
$GLOBALS['content_width'] = apply_filters( 'zeitfresser_content_width', 640 );
@@ -150,206 +174,243 @@ function zeitfresser_content_width() {
add_action( 'after_setup_theme', 'zeitfresser_content_width', 0 );
/**
* Register widget area.
*
* @return void
* ------------------------------------------------------------------------
* Widgets
* ------------------------------------------------------------------------
*/
function zeitfresser_widgets_init() {
register_sidebar(
array(
'name' => esc_html__( 'Sidebar', 'zeitfresser' ),
'id' => 'sidebar-1',
'description' => esc_html__( 'Add widgets here.', 'zeitfresser' ),
'before_widget' => '<section id="%1$s" class="widget %2$s">',
'after_widget' => '</section>',
'before_title' => '<h4 class="widget-title">',
'after_title' => '</h4>',
)
);
register_sidebar( array(
'name' => esc_html__( 'Sidebar', 'zeitfresser' ),
'id' => 'sidebar-1',
'description' => esc_html__( 'Add widgets here.', 'zeitfresser' ),
'before_widget' => '<section id="%1$s" class="widget %2$s">',
'after_widget' => '</section>',
'before_title' => '<h4 class="widget-title">',
'after_title' => '</h4>',
));
}
add_action( 'widgets_init', 'zeitfresser_widgets_init' );
/**
* Enqueue floating TOC assets on single posts.
*
* @return void
*/
function zeitfresser_enqueue_toc_assets() {
if ( is_singular( 'post' ) && zeitfresser_has_floating_toc() ) {
wp_enqueue_script(
'zeitfresser-toc',
get_template_directory_uri() . '/js/toc.js',
array(),
ZEITFRESSER_VERSION,
true
);
}
}
add_action( 'wp_enqueue_scripts', 'zeitfresser_enqueue_toc_assets', 20 );
/**
* Return file version using filemtime in production-safe form.
*
* @param string $relative_path Relative file path inside the theme.
* @return string
*/
function zeitfresser_asset_version( $relative_path ) {
$path = get_template_directory() . $relative_path;
return file_exists( $path ) ? (string) filemtime( $path ) : ZEITFRESSER_VERSION;
}
/**
* Enqueue scripts and styles.
*
* @return void
* ------------------------------------------------------------------------
* Assets
* ------------------------------------------------------------------------
*/
function zeitfresser_scripts() {
// Base stylesheet (theme root)
wp_enqueue_style(
'zeitfresser',
get_template_directory_uri() . '/style.css',
array(),
zeitfresser_asset_version( '/style.css' )
[],
file_exists( get_template_directory() . '/style.css' )
? filemtime( get_template_directory() . '/style.css' )
: ZEITFRESSER_VERSION
);
// Styles
$fonts = zeitfresser_asset_versioned('/css/fonts.css');
$colors = zeitfresser_asset_versioned('/css/colors.css');
wp_enqueue_style(
'zeitfresser-fonts',
$fonts['url'],
[],
$fonts['version']
);
wp_enqueue_style(
'zeitfresser-colors',
$colors['url'],
['zeitfresser'],
$colors['version']
);
// Scripts
$nav = zeitfresser_asset_versioned('/js/navigation.js');
$scripts = zeitfresser_asset_versioned('/js/scripts.js');
wp_enqueue_script(
'zeitfresser-navigation',
get_template_directory_uri() . '/js/navigation.js',
array(),
zeitfresser_asset_version( '/js/navigation.js' ),
$nav['url'],
[],
$nav['version'],
true
);
if ( is_home() || is_front_page() || is_archive() || is_search() ) {
wp_enqueue_script(
'zeitfresser-masonry',
get_template_directory_uri() . '/js/masonry.pkgd.min.js',
array(),
zeitfresser_asset_version( '/js/masonry.pkgd.min.js' ),
true
);
}
wp_enqueue_script(
'zeitfresser-scripts',
get_template_directory_uri() . '/js/scripts.js',
array(),
zeitfresser_asset_version( '/js/scripts.js' ),
$scripts['url'],
[],
$scripts['version'],
true
);
// WordPress native threaded comments
if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
wp_enqueue_script( 'comment-reply' );
}
}
add_action( 'wp_enqueue_scripts', 'zeitfresser_scripts', 10 );
/**
* Load RTL stylesheet from /css folder
* ------------------------------------------------------------------------
* Performance Tweaks
* ------------------------------------------------------------------------
*/
function zeitfresser_rtl_styles() {
if ( is_rtl() ) {
wp_enqueue_style(
'zeitfresser-rtl',
get_template_directory_uri() . '/css/style-rtl.css',
array('zeitfresser'),
filemtime(get_template_directory() . '/css/style-rtl.css')
);
/**
* ------------------------------------------------------------------------
* Defer non-critical JavaScript
* ------------------------------------------------------------------------
*
* Prevents JS from blocking page rendering.
*/
function zeitfresser_defer_scripts( $tag, $handle, $src ) {
$defer_scripts = array(
'zeitfresser-navigation',
'zeitfresser-scripts',
);
if ( in_array( $handle, $defer_scripts, true ) ) {
return str_replace( ' src=', ' defer src=', $tag );
}
}
add_action( 'wp_enqueue_scripts', 'zeitfresser_rtl_styles', 11 );
function zeitfresser_enqueue_static_colors() {
wp_enqueue_style(
'zeitfresser-colors',
get_template_directory_uri() . '/css/colors.css',
array('zeitfresser'),
file_exists(get_template_directory() . '/css/colors.css')
? filemtime(get_template_directory() . '/css/colors.css')
: ZEITFRESSER_VERSION
);
return $tag;
}
add_action( 'wp_enqueue_scripts', 'zeitfresser_enqueue_static_colors', 20 );
function zeitfresser_enqueue_static_fonts() {
wp_enqueue_style(
'zeitfresser-fonts',
get_template_directory_uri() . '/css/fonts.css',
array(),
file_exists(get_template_directory() . '/css/fonts.css')
? filemtime(get_template_directory() . '/css/fonts.css')
: ZEITFRESSER_VERSION
);
}
add_action( 'wp_enqueue_scripts', 'zeitfresser_enqueue_static_fonts', 15 );
add_filter( 'script_loader_tag', 'zeitfresser_defer_scripts', 10, 3 );
/**
* Theme package marker kept for compatibility with the original premium controls.
* ------------------------------------------------------------------------
* Image Loading Optimization (LCP + Lazy Loading)
* ------------------------------------------------------------------------
*
* @return string
* Ensures the first visible image loads immediately (LCP),
* while all other images are lazy-loaded for performance.
*/
function zeitfresser_free_pro() {
return 'pro';
}
function zeitfresser_optimize_image_attributes( $attr, $attachment, $size ) {
require get_template_directory() . '/inc/template-tags.php';
require get_template_directory() . '/inc/template-functions.php';
require get_template_directory() . '/inc/customizer.php';
static $is_first = true;
if ( defined( 'JETPACK__VERSION' ) ) {
require get_template_directory() . '/inc/jetpack.php';
}
require get_template_directory() . '/inc/blocks/blocks.php';
require get_template_directory() . '/inc/pagination.php';
/**
* Add safe front-end performance optimizations.
*
* @return void
*/
function zeitfresser_performance_setup() {
// Disable the legacy embeds script on the front end. Native iframes still work.
if ( ! is_admin() ) {
wp_deregister_script( 'wp-embed' );
if ( $is_first ) {
// First image (critical for LCP)
$attr['loading'] = 'eager';
$is_first = false;
} else {
// All other images
$attr['loading'] = 'lazy';
}
// Improve decoding performance
$attr['decoding'] = 'async';
}
return $attr;
}
add_action( 'wp_enqueue_scripts', 'zeitfresser_performance_setup', 100 );
add_filter( 'wp_get_attachment_image_attributes', 'zeitfresser_optimize_image_attributes', 10, 3 );
/**
* Remove unnecessary head output for a leaner front end.
* Lower the threshold for WordPress scaled originals when auto optimization is enabled.
*
* @return void
* When automatic optimization is disabled, original uploads should remain untouched.
*
* @return int|false
*/
function zeitfresser_cleanup_wp_head() {
remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
remove_action( 'wp_print_styles', 'print_emoji_styles' );
remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
remove_action( 'admin_print_styles', 'print_emoji_styles' );
remove_action( 'wp_head', 'rsd_link' );
remove_action( 'wp_head', 'wlwmanifest_link' );
remove_action( 'wp_head', 'wp_generator' );
remove_action( 'wp_head', 'rest_output_link_wp_head', 10 );
remove_action( 'wp_head', 'wp_shortlink_wp_head', 10 );
remove_action( 'wp_head', 'wp_oembed_add_discovery_links', 10 );
remove_action( 'wp_head', 'wp_oembed_add_host_js' );
remove_action( 'wp_head', 'adjacent_posts_rel_link_wp_head', 10 );
function zeitfresser_big_image_size_threshold() {
$auto_enabled = get_theme_mod( 'ztfr_auto_optimize', true );
$force_enabled = ! empty( $GLOBALS['zeitfresser_force_image_optimization'] );
if ( ! $auto_enabled && ! $force_enabled ) {
return false;
}
return 1800;
}
add_action( 'init', 'zeitfresser_cleanup_wp_head' );
add_filter( 'big_image_size_threshold', 'zeitfresser_big_image_size_threshold' );
/**
* Preload critical local fonts only
* Skip generating oversized core intermediate sizes we do not use.
*
* @param array $sizes Registered intermediate sizes.
* @return array
*/
function zeitfresser_filter_intermediate_image_sizes( $sizes ) {
$auto_enabled = get_theme_mod( 'ztfr_auto_optimize', true );
$force_enabled = ! empty( $GLOBALS['zeitfresser_force_image_optimization'] );
if ( ! $auto_enabled && ! $force_enabled ) {
return $sizes;
}
unset(
$sizes['1536x1536'],
$sizes['2048x2048']
);
return $sizes;
}
add_filter( 'intermediate_image_sizes_advanced', 'zeitfresser_filter_intermediate_image_sizes' );
/**
* Improve attachment image attributes for layout stability and fetch priority.
*
* @param array $attr Image markup attributes.
* @param WP_Post $attachment Attachment post object.
* @param string|array $size Requested image size.
* @return array
*/
function zeitfresser_improve_attachment_dimensions( $attr, $attachment, $size ) {
if ( empty( $attr['width'] ) || empty( $attr['height'] ) ) {
$metadata = wp_get_attachment_metadata( $attachment->ID );
if ( is_array( $metadata ) && ! empty( $metadata['width'] ) && ! empty( $metadata['height'] ) ) {
if ( empty( $attr['width'] ) ) {
$attr['width'] = (int) $metadata['width'];
}
if ( empty( $attr['height'] ) ) {
$attr['height'] = (int) $metadata['height'];
}
}
}
if ( empty( $attr['fetchpriority'] ) && ! is_admin() && ! is_feed() ) {
static $did_set_high_priority = false;
if ( ! $did_set_high_priority && is_singular() ) {
$attr['fetchpriority'] = 'high';
$did_set_high_priority = true;
}
}
return $attr;
}
add_filter( 'wp_get_attachment_image_attributes', 'zeitfresser_improve_attachment_dimensions', 11, 3 );
/**
* ------------------------------------------------------------------------
* Preload critical fonts
* ------------------------------------------------------------------------
*
* Preloads only the fonts that are needed for initial rendering
* (headings + body text). This improves LCP and avoids render delays.
*/
function zeitfresser_preload_fonts() {
?>
<!-- Critical Fonts Only -->
<link rel="preload" href="<?php echo get_template_directory_uri(); ?>/fonts/oswald-400.woff2" as="font" type="font/woff2" crossorigin>
<link rel="preload" href="<?php echo get_template_directory_uri(); ?>/fonts/oswald-700.woff2" as="font" type="font/woff2" crossorigin>
<link rel="preload" href="<?php echo get_template_directory_uri(); ?>/fonts/roboto-400.woff2" as="font" type="font/woff2" crossorigin>
<link rel="preload" href="<?php echo zeitfresser_asset('/fonts/oswald-400.woff2'); ?>" as="font" type="font/woff2" crossorigin>
<link rel="preload" href="<?php echo zeitfresser_asset('/fonts/oswald-700.woff2'); ?>" as="font" type="font/woff2" crossorigin>
<link rel="preload" href="<?php echo zeitfresser_asset('/fonts/roboto-400.woff2'); ?>" as="font" type="font/woff2" crossorigin>
<link rel="preload" href="<?php echo zeitfresser_asset('/fonts/roboto-500.woff2'); ?>" as="font" type="font/woff2" crossorigin>
<?php
}
add_action('wp_head', 'zeitfresser_preload_fonts', 1);
add_action('wp_head', 'zeitfresser_preload_fonts', 0);
/**
* Optimize font loading with preconnect
@@ -368,72 +429,61 @@ add_filter( 'wp_resource_hints', function( $urls, $relation_type ) {
}, 10, 2 );
/**
* Remove front-end dashicons for visitors.
* ------------------------------------------------------------------------
* Critical CSS (inline for faster first render)
* ------------------------------------------------------------------------
*
* @return void
* We inline only the minimal CSS required for initial layout.
* This ensures the page structure renders immediately without
* waiting for the full stylesheet.
*/
function zeitfresser_maybe_dequeue_dashicons() {
if ( ! is_user_logged_in() ) {
wp_deregister_style( 'dashicons' );
function zeitfresser_inline_critical_css() {
?>
<style>
body {
margin: 0;
background: #1e1f29;
}
.container {
max-width: var(--container-width, 1140px);
margin: 0 auto;
padding: 0 70px;
}
@media (max-width: 800px) {
.container {
padding: 0 20px;
}
}
.custom-grid-view {
display: grid;
}
header.site-header {
background: var(--light-color);
}
</style>
<?php
}
add_action('wp_head', 'zeitfresser_inline_critical_css', 1);
function zeitfresser_performance_setup() {
if ( ! is_admin() ) {
wp_deregister_script( 'wp-embed' );
}
}
add_action( 'wp_enqueue_scripts', 'zeitfresser_maybe_dequeue_dashicons', 100 );
add_action( 'wp_enqueue_scripts', 'zeitfresser_performance_setup', 100 );
/**
* Improve image decoding defaults without changing visual output.
*
* @param array $attr Image markup attributes.
* @param WP_Post $attachment Attachment post object.
* @param string|array $size Requested image size.
* @return array
*/
function zeitfresser_optimize_image_attributes( $attr, $attachment, $size ) {
if ( empty( $attr['decoding'] ) ) {
$attr['decoding'] = 'async';
}
if ( empty( $attr['loading'] ) && ! is_admin() ) {
$attr['loading'] = 'lazy';
}
return $attr;
function zeitfresser_cleanup_wp_head() {
remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
remove_action( 'wp_print_styles', 'print_emoji_styles' );
remove_action( 'wp_head', 'rsd_link' );
remove_action( 'wp_head', 'wlwmanifest_link' );
remove_action( 'wp_head', 'wp_generator' );
}
add_filter( 'wp_get_attachment_image_attributes', 'zeitfresser_optimize_image_attributes', 10, 3 );
/**
* Lower the threshold for WordPress scaled originals when auto optimization is enabled.
*
* When automatic optimization is disabled, original uploads should remain untouched.
*
* @return int|false
*/
function zeitfresser_big_image_size_threshold() {
if ( ! get_theme_mod( 'ztfr_auto_optimize', true ) ) {
return false;
}
return 1800;
}
add_filter( 'big_image_size_threshold', 'zeitfresser_big_image_size_threshold' );
/**
* Skip generating oversized core intermediate sizes we do not use.
*
* @param array $sizes Registered intermediate sizes.
* @return array
*/
function zeitfresser_filter_intermediate_image_sizes( $sizes ) {
// Remove oversized defaults
unset(
$sizes['1536x1536'],
$sizes['2048x2048']
);
return $sizes;
}
add_filter( 'intermediate_image_sizes_advanced', 'zeitfresser_filter_intermediate_image_sizes' );
add_action( 'init', 'zeitfresser_cleanup_wp_head' );
/**
* Convert generated JPEG and PNG files to AVIF/WebP when enabled.
@@ -513,12 +563,12 @@ add_filter(
function zeitfresser_auto_optimize_on_upload( $metadata, $attachment_id ) {
// 🔒 only images
// Only images
if ( ! wp_attachment_is_image( $attachment_id ) ) {
return $metadata;
}
// 🔒 feature toggle
// Feature toggle
if ( ! get_theme_mod( 'ztfr_auto_optimize', true ) ) {
return $metadata;
}
@@ -529,14 +579,12 @@ function zeitfresser_auto_optimize_on_upload( $metadata, $attachment_id ) {
return $metadata;
}
// 🔥 DO NOT overwrite upload-captured original
// DO NOT overwrite captured original
if ( ! get_post_meta( $attachment_id, '_zeitfresser_original_file', true ) ) {
// fallback only
update_post_meta( $attachment_id, '_zeitfresser_original_file', $file );
}
// mark as optimized
// Mark optimized (IMPORTANT: no re-trigger here)
update_post_meta(
$attachment_id,
'_zeitfresser_media_optimized_version',
@@ -562,11 +610,10 @@ function zeitfresser_auto_delete_original_after_upload( $metadata, $attachment_i
return $metadata;
}
if ( ! get_theme_mod( 'ztfr_auto_optimize', true ) ) {
return $metadata;
}
$auto_enabled = get_theme_mod( 'ztfr_auto_optimize', true );
$delete_enabled = get_theme_mod( 'ztfr_auto_delete', false );
if ( ! get_theme_mod( 'ztfr_auto_delete', false ) ) {
if ( ! $auto_enabled || ! $delete_enabled ) {
return $metadata;
}
@@ -582,20 +629,22 @@ function zeitfresser_auto_delete_original_after_upload( $metadata, $attachment_i
$ext = strtolower( pathinfo( $original, PATHINFO_EXTENSION ) );
// Skip modern formats
if ( in_array( $ext, [ 'webp', 'avif' ], true ) ) {
update_post_meta( $attachment_id, '_zeitfresser_original_deleted', 1 );
return $metadata;
}
// If nothing remains, mark as completed.
// 🔥 Wenn nichts mehr existiert → fertig
if ( ! zeitfresser_original_family_exists( $attachment_id, $original ) ) {
update_post_meta( $attachment_id, '_zeitfresser_original_deleted', 1 );
return $metadata;
}
// 🔥 HIER passiert der Fix
zeitfresser_delete_original_family_files( $attachment_id, $original );
// Only mark as deleted when all original-format files are gone.
// Final check
if ( ! zeitfresser_original_family_exists( $attachment_id, $original ) ) {
update_post_meta( $attachment_id, '_zeitfresser_original_deleted', 1 );
}
@@ -612,56 +661,21 @@ function zeitfresser_auto_delete_original_after_upload( $metadata, $attachment_i
*/
function zeitfresser_image_quality( $quality, $mime_type = 'image/jpeg' ) {
switch ( $mime_type ) {
case 'image/avif':
return 50;
$auto_enabled = get_theme_mod( 'ztfr_auto_optimize', true );
$force_enabled = ! empty( $GLOBALS['zeitfresser_force_image_optimization'] );
case 'image/webp':
return 75;
case 'image/jpeg':
default:
return 82;
if ( ! $auto_enabled && ! $force_enabled ) {
return $quality;
}
return match ($mime_type) {
'image/avif' => 50,
'image/webp' => 75,
default => 82,
};
}
add_filter( 'wp_editor_set_quality', 'zeitfresser_image_quality', 10, 2 );
/**
* Improve attachment image attributes for layout stability and fetch priority.
*
* @param array $attr Image markup attributes.
* @param WP_Post $attachment Attachment post object.
* @param string|array $size Requested image size.
* @return array
*/
function zeitfresser_improve_attachment_dimensions( $attr, $attachment, $size ) {
if ( empty( $attr['width'] ) || empty( $attr['height'] ) ) {
$metadata = wp_get_attachment_metadata( $attachment->ID );
if ( is_array( $metadata ) && ! empty( $metadata['width'] ) && ! empty( $metadata['height'] ) ) {
if ( empty( $attr['width'] ) ) {
$attr['width'] = (int) $metadata['width'];
}
if ( empty( $attr['height'] ) ) {
$attr['height'] = (int) $metadata['height'];
}
}
}
if ( empty( $attr['fetchpriority'] ) && ! is_admin() && ! is_feed() ) {
static $did_set_high_priority = false;
if ( ! $did_set_high_priority && is_singular() ) {
$attr['fetchpriority'] = 'high';
$did_set_high_priority = true;
}
}
return $attr;
}
add_filter( 'wp_get_attachment_image_attributes', 'zeitfresser_improve_attachment_dimensions', 11, 3 );
/**
* Improve responsive image sizes attribute.
*
@@ -684,111 +698,3 @@ function zeitfresser_responsive_image_sizes( $sizes, $size ) {
return $sizes;
}
add_filter( 'wp_calculate_image_sizes', 'zeitfresser_responsive_image_sizes', 10, 2 );
/**
* Determine the most likely LCP image URL.
*
* @return string
*/
function zeitfresser_get_lcp_image_url() {
// Single posts/pages → featured image
if ( is_singular() ) {
$post_id = get_queried_object_id();
if ( $post_id && has_post_thumbnail( $post_id ) ) {
return get_the_post_thumbnail_url( $post_id, 'large' );
}
}
// Archives / homepage → first post with thumbnail
if ( is_home() || is_front_page() || is_archive() || is_search() ) {
global $wp_query;
if ( ! empty( $wp_query->posts ) ) {
foreach ( $wp_query->posts as $post ) {
if ( has_post_thumbnail( $post->ID ) ) {
return get_the_post_thumbnail_url( $post->ID, 'medium_large' );
}
}
}
}
return '';
}
/**
* Preload the most likely LCP image for archive and singular views.
*
* @param array $resources Existing preload resources.
* @return array
*/
function zeitfresser_preload_resources( $resources ) {
if ( is_admin() || is_feed() || is_embed() ) {
return $resources;
}
// 🔥 NEW: use smart detection
$image_url = zeitfresser_get_lcp_image_url();
if ( empty( $image_url ) ) {
return $resources;
}
// Robust extension detection
$extension = strtolower(
pathinfo(
wp_parse_url( $image_url, PHP_URL_PATH ),
PATHINFO_EXTENSION
)
);
// MIME fallback
$image_type = 'image/jpeg';
if ( 'png' === $extension ) {
$image_type = 'image/png';
} elseif ( 'webp' === $extension ) {
$image_type = 'image/webp';
} elseif ( 'avif' === $extension ) {
$image_type = 'image/avif';
}
$resources[] = array_filter(
array(
'href' => esc_url( $image_url ),
'as' => 'image',
'type' => $image_type,
'fetchpriority' => 'high',
)
);
return $resources;
}
add_filter( 'wp_preload_resources', 'zeitfresser_preload_resources' );
/**
* Improve script loading strategy for non-critical assets.
*
* @param array $tag Script tag markup.
* @param string $handle Script handle.
* @param string $src Script source URL.
* @return string
*/
function zeitfresser_defer_non_critical_scripts( $tag, $handle, $src ) {
$deferred_handles = array(
'zeitfresser-navigation',
'zeitfresser-masonry',
'zeitfresser-scripts',
);
if ( in_array( $handle, $deferred_handles, true ) && false === strpos( $tag, ' defer' ) ) {
return str_replace( ' src=', ' defer src=', $tag );
}
return $tag;
}
add_filter( 'script_loader_tag', 'zeitfresser_defer_non_critical_scripts', 10, 3 );