57 lines
1.8 KiB
PHP
57 lines
1.8 KiB
PHP
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<?php
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/**
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* Picture Snippet - Optimized image output with responsive srcset and WebP support
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*
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* @param Kirby\Cms\File $file - Required: The image file object
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* @param string $alt - Optional: Alt text (defaults to file's alt field)
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* @param string $class - Optional: CSS class for the picture element
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* @param string|int $size - Optional: Size hint in vw for the sizes attribute (e.g., 50 for 50vw)
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* @param bool $lazy - Optional: Enable native lazy loading (default: true)
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* @param string $preset - Optional: Thumb preset to use (default: 'default')
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* @param bool $crop - Optional: Crop the image (default: false)
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*/
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if (!isset($file) || !$file) return;
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// Configuration
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$alt = $alt ?? $file->alt()->or($file->filename())->value();
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$class = isset($class) ? 'class="' . $class . '"' : '';
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$lazy = $lazy ?? true;
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$preset = $preset ?? 'default';
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// Sizes attribute - determines which image size the browser should load
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if (isset($size)) {
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$sizes = is_numeric($size)
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? "(min-width: 1024px) {$size}vw, 100vw"
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: $size;
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} else {
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$sizes = "(min-width: 1024px) 50vw, 100vw";
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}
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// Generate srcsets for WebP and fallback
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$webpSrcset = $file->srcset('webp');
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$srcset = $file->srcset('default');
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// Get optimized source URL
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$src = $file->thumb($preset)->url();
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// Get dimensions to avoid layout shift
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$width = $file->width();
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$height = $file->height();
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$aspectRatio = $height > 0 ? ($height / $width) * 100 : 0;
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?>
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<picture <?= $class ?> data-id="<?= $file->uuid() ?>">
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<source srcset="<?= $webpSrcset ?>" sizes="<?= $sizes ?>" type="image/webp">
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<img
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src="<?= $src ?>"
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srcset="<?= $srcset ?>"
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sizes="<?= $sizes ?>"
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width="<?= $width ?>"
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height="<?= $height ?>"
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alt="<?= $alt ?>"
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<?= $lazy ? 'loading="lazy"' : '' ?>
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style="aspect-ratio: <?= $width ?> / <?= $height ?>;"
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>
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</picture>
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