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Zeitfresser-Wordpress-Theme/functions.php
T
Dome 33df5bbe2e refactor(css): restructure stylesheet, remove duplicates, and improve maintainability 
* reorganized CSS into clear sections (Root, Base, Layout, Typography, Components, Utilities)
* removed redundant and duplicate rules (header, branding, search, media, etc.)
* consolidated repeated selectors into single sources of truth
* unified form styles (comments + CF7)
* cleaned up sidebar/widget styles and resolved conflicting rules
* fixed related posts grid issue (min-width: 0 for grid children)
* improved TOC structure and extracted shared calculations
* simplified social links and hover behavior
* removed unsafe global performance hint (will-change)
* added prefers-reduced-motion support for accessibility
* improved overall cascade predictability and reduced specificity conflicts

No visual changes intended (safe refactor).
2026-04-29 19:24:55 +02:00

709 lines
20 KiB
PHP
Raw Blame History

<?php
/**
* Zeitfresser theme functions and definitions.
*
* @package zeitfresser
*/
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
/**
* ------------------------------------------------------------------------
* Theme Constants
* ------------------------------------------------------------------------
*/
if ( ! defined( 'ZEITFRESSER_VERSION' ) ) {
define( 'ZEITFRESSER_VERSION', '2.3.6' );
}
if ( ! defined( 'ZEITFRESSER_IMAGE_OPTIMIZATION_VERSION' ) ) {
define( 'ZEITFRESSER_IMAGE_OPTIMIZATION_VERSION', '1.0' );
}
/**
* ------------------------------------------------------------------------
* Core Modules
* ------------------------------------------------------------------------
*/
// Helpers (foundation)
require get_template_directory() . '/inc/helpers/zeitfresser-helpers.php';
// Theme logic
require get_template_directory() . '/inc/zeitfresser-toc.php';
// Performance layer
require get_template_directory() . '/inc/performance/performance-tools.php';
/**
* ------------------------------------------------------------------------
* 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 ) {
if ( empty( $upload['file'] ) ) {
return $upload;
}
// Store temporarily (request-scoped)
$GLOBALS['zeitfresser_last_uploaded_file'] = $upload['file'];
return $upload;
}
add_filter( 'wp_handle_upload', 'zeitfresser_capture_original_upload', 10, 2 );
/**
* Persist original file path to attachment meta
*/
function zeitfresser_store_original_file( $attachment_id ) {
if ( ! wp_attachment_is_image( $attachment_id ) ) {
return;
}
if ( empty( $GLOBALS['zeitfresser_last_uploaded_file'] ) ) {
return;
}
$file = $GLOBALS['zeitfresser_last_uploaded_file'];
// Safety: ensure file still exists
if ( ! file_exists( $file ) ) {
return;
}
// Prevent overwrite if already set
if ( get_post_meta( $attachment_id, '_zeitfresser_original_file', true ) ) {
return;
}
update_post_meta(
$attachment_id,
'_zeitfresser_original_file',
$file
);
}
add_action( 'add_attachment', 'zeitfresser_store_original_file' );
/**
* ------------------------------------------------------------------------
* 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( 'customize-selective-refresh-widgets' );
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' ),
));
add_editor_style( 'editor-style.css' );
}
add_action( 'after_setup_theme', 'zeitfresser_setup' );
/**
* ------------------------------------------------------------------------
* Image Sizes
* ------------------------------------------------------------------------
*/
function zeitfresser_custom_image_sizes() {
add_image_size( 'zeitfresser-content', 720, 0, false );
add_image_size( 'zeitfresser-card', 480, 0, false );
}
add_action( 'after_setup_theme', 'zeitfresser_custom_image_sizes' );
/**
* ------------------------------------------------------------------------
* Content Width
* ------------------------------------------------------------------------
*/
function zeitfresser_content_width() {
$GLOBALS['content_width'] = apply_filters( 'zeitfresser_content_width', 640 );
}
add_action( 'after_setup_theme', 'zeitfresser_content_width', 0 );
/**
* ------------------------------------------------------------------------
* Widgets
* ------------------------------------------------------------------------
*/
function zeitfresser_widgets_init() {
register_sidebar( array(
'name' => esc_html__( 'Sidebar', 'zeitfresser' ),
'id' => 'sidebar-1',
'description' => esc_html__( 'Add widgets here.', 'zeitfresser' ),
'before_widget' => '<section id="%1$s" class="widget %2$s">',
'after_widget' => '</section>',
'before_title' => '<h4 class="widget-title">',
'after_title' => '</h4>',
));
}
add_action( 'widgets_init', 'zeitfresser_widgets_init' );
/**
* ------------------------------------------------------------------------
* Assets
* ------------------------------------------------------------------------
*/
function zeitfresser_scripts() {
// Base stylesheet (theme root)
wp_enqueue_style(
'zeitfresser',
get_template_directory_uri() . '/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',
$nav['url'],
[],
$nav['version'],
true
);
wp_enqueue_script(
'zeitfresser-scripts',
$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 );
/**
* ------------------------------------------------------------------------
* Performance Tweaks
* ------------------------------------------------------------------------
*/
/**
* ------------------------------------------------------------------------
* 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 );
}
return $tag;
}
add_filter( 'script_loader_tag', 'zeitfresser_defer_scripts', 10, 3 );
/**
* ------------------------------------------------------------------------
* Image Loading Optimization (LCP + Lazy Loading)
* ------------------------------------------------------------------------
*
* Ensures the first visible image loads immediately (LCP),
* while all other images are lazy-loaded for performance.
*/
function zeitfresser_optimize_image_attributes( $attr, $attachment, $size ) {
static $is_first = true;
if ( ! is_admin() ) {
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_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() {
$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_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 ) {
$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 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', 0);
/**
* Optimize font loading with preconnect
*/
add_filter( 'wp_resource_hints', function( $urls, $relation_type ) {
if ( 'preconnect' === $relation_type ) {
$urls[] = [
'href' => get_template_directory_uri(),
'crossorigin' => 'anonymous',
];
}
return $urls;
}, 10, 2 );
/**
* ------------------------------------------------------------------------
* Critical CSS (inline for faster first render)
* ------------------------------------------------------------------------
*
* 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_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_performance_setup', 100 );
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_action( 'init', 'zeitfresser_cleanup_wp_head' );
/**
* Convert generated JPEG and PNG files to AVIF/WebP when enabled.
*
* Auto optimization can be disabled for uploads via Customizer.
* Manual optimization may still force conversion through a request-scoped flag.
*
* @param array $formats Output format map.
* @return array
*/
function zeitfresser_image_output_format( $formats ) {
$auto_enabled = get_theme_mod( 'ztfr_auto_optimize', true );
$force_enabled = ! empty( $GLOBALS['zeitfresser_force_image_optimization'] );
if ( ! $auto_enabled && ! $force_enabled ) {
return $formats;
}
if ( function_exists( 'wp_image_editor_supports' ) ) {
// Prefer AVIF if supported.
if ( wp_image_editor_supports( array( 'mime_type' => 'image/avif' ) ) ) {
$formats['image/jpeg'] = 'image/avif';
$formats['image/png'] = 'image/avif';
// Fallback to WebP.
} elseif ( wp_image_editor_supports( array( 'mime_type' => 'image/webp' ) ) ) {
$formats['image/jpeg'] = 'image/webp';
$formats['image/png'] = 'image/webp';
}
}
return $formats;
}
add_filter( 'image_editor_output_format', 'zeitfresser_image_output_format' );
/**
* Mark images as optimized only when optimization is actually active.
*
* @param array $metadata Attachment metadata.
* @param int $attachment_id Attachment ID.
* @return array
*/
function zeitfresser_mark_new_images_optimized( $metadata, $attachment_id ) {
if ( ! wp_attachment_is_image( $attachment_id ) ) {
return $metadata;
}
$auto_enabled = get_theme_mod( 'ztfr_auto_optimize', true );
$force_enabled = ! empty( $GLOBALS['zeitfresser_force_image_optimization'] );
if ( ! $auto_enabled && ! $force_enabled ) {
return $metadata;
}
update_post_meta(
$attachment_id,
'_zeitfresser_media_optimized_version',
ZEITFRESSER_IMAGE_OPTIMIZATION_VERSION
);
return $metadata;
}
add_filter( 'wp_generate_attachment_metadata', 'zeitfresser_mark_new_images_optimized', 20, 2 );
/**
* Auto Optimize Hook
*/
add_filter(
'wp_generate_attachment_metadata',
'zeitfresser_auto_optimize_on_upload',
15,
2
);
function zeitfresser_auto_optimize_on_upload( $metadata, $attachment_id ) {
// Only images
if ( ! wp_attachment_is_image( $attachment_id ) ) {
return $metadata;
}
// Feature toggle
if ( ! get_theme_mod( 'ztfr_auto_optimize', true ) ) {
return $metadata;
}
$file = get_attached_file( $attachment_id );
if ( ! $file || ! file_exists( $file ) ) {
return $metadata;
}
// DO NOT overwrite captured original
if ( ! get_post_meta( $attachment_id, '_zeitfresser_original_file', true ) ) {
update_post_meta( $attachment_id, '_zeitfresser_original_file', $file );
}
// Mark optimized (IMPORTANT: no re-trigger here)
update_post_meta(
$attachment_id,
'_zeitfresser_media_optimized_version',
ZEITFRESSER_IMAGE_OPTIMIZATION_VERSION
);
return $metadata;
}
/**
* Auto Delete Hook
*/
add_filter(
'wp_generate_attachment_metadata',
'zeitfresser_auto_delete_original_after_upload',
30,
2
);
function zeitfresser_auto_delete_original_after_upload( $metadata, $attachment_id ) {
if ( ! wp_attachment_is_image( $attachment_id ) ) {
return $metadata;
}
$auto_enabled = get_theme_mod( 'ztfr_auto_optimize', true );
$delete_enabled = get_theme_mod( 'ztfr_auto_delete', false );
if ( ! $auto_enabled || ! $delete_enabled ) {
return $metadata;
}
$original = get_post_meta(
$attachment_id,
'_zeitfresser_original_file',
true
);
if ( ! $original ) {
return $metadata;
}
$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;
}
// 🔥 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 );
// Final check
if ( ! zeitfresser_original_family_exists( $attachment_id, $original ) ) {
update_post_meta( $attachment_id, '_zeitfresser_original_deleted', 1 );
}
return $metadata;
}
/**
* Keep generated image quality balanced for file size and visual fidelity.
*
* @param int $quality Proposed image quality.
* @param string $mime_type Image mime type.
* @return int
*/
function zeitfresser_image_quality( $quality, $mime_type = 'image/jpeg' ) {
$auto_enabled = get_theme_mod( 'ztfr_auto_optimize', true );
$force_enabled = ! empty( $GLOBALS['zeitfresser_force_image_optimization'] );
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 responsive image sizes attribute.
*
* @param string $sizes Existing sizes attribute.
* @param array $size Requested image size.
* @return string
*/
function zeitfresser_responsive_image_sizes( $sizes, $size ) {
// Single post content
if ( is_singular() ) {
return '(max-width: 768px) 100vw, (max-width: 1200px) 720px, 720px';
}
// Archive / blog overview
if ( is_home() || is_front_page() || is_archive() || is_search() ) {
return '(max-width: 768px) 100vw, (max-width: 1200px) 50vw, 400px';
}
return $sizes;
}
add_filter( 'wp_calculate_image_sizes', 'zeitfresser_responsive_image_sizes', 10, 2 );
/**
* Delete Cookie Button
*/
add_filter( 'comment_form_default_fields', function( $fields ) {
unset( $fields['cookies'] );
return $fields;
});
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