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feat(picture): support sizes attribute #482

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merged 4 commits into from
Sep 5, 2023
Merged

feat(picture): support sizes attribute #482

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57382bb
feat(picture): support `sizes` attribute
cawa-93 Sep 5, 2023
1ce96c2
test: rollback tests
cawa-93 Sep 5, 2023
be04a86
use width dimension descriptors only if `sizes` provided
cawa-93 Sep 5, 2023
c3433ab
deno fmt
cawa-93 Sep 5, 2023
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26 changes: 22 additions & 4 deletions plugins/picture.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -90,23 +90,35 @@ export default function (): Plugin {
basePath: string,
) {
const src = img.getAttribute("src") as string;
const sizes = img.getAttribute("sizes");
const sourceFormats = saveTransform(basePath, src, imagick);

for (const sourceFormat of sourceFormats) {
const source = createSource(img.ownerDocument!, src, sourceFormat);
const source = createSource(
img.ownerDocument!,
src,
sourceFormat,
sizes,
);
picture.insertBefore(source, img);
}
}

function handleImg(imagick: string, img: Element, basePath: string) {
const src = img.getAttribute("src") as string;
const sizes = img.getAttribute("sizes");
const sourceFormats = saveTransform(basePath, src, imagick);
const picture = img.ownerDocument!.createElement("picture");

img.replaceWith(picture);

for (const sourceFormat of sourceFormats) {
const source = createSource(img.ownerDocument!, src, sourceFormat);
const source = createSource(
img.ownerDocument!,
src,
sourceFormat,
sizes,
);
picture.append(source);
}

Expand Down Expand Up @@ -194,19 +206,25 @@ function createSource(
document: Document,
src: string,
srcFormat: SourceFormat,
sizes?: string | null | undefined,
) {
const source = document.createElement("source");
const { scales, format } = srcFormat;
const { scales, format, width } = srcFormat;
const path = encodeURI(getPathAndExtension(src)[0]);
const srcset: string[] = [];

for (const [suffix, scale] of Object.entries(scales)) {
const scaleSuffix = scale === 1 ? "" : ` ${scale}x`;
const scaleSuffix = ` ${scale * width}w`;
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srcset.push(`${path}${suffix}.${format}${scaleSuffix}`);
}

source.setAttribute("srcset", srcset.join(", "));
source.setAttribute("type", typeByExtension(format));

if (sizes) {
source.setAttribute("sizes", sizes);
}

return source;
}

Expand Down
6 changes: 3 additions & 3 deletions tests/__snapshots__/picture.test.ts.snap
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Original file line number Diff line number Diff line change
Expand Up @@ -113,16 +113,16 @@ snapshot[`imagick plugin 3`] = `

<body>
<div>
<picture><source srcset="/kevin%20schmid%20unsplash-600w.png, /kevin%20schmid%20unsplash-600w@2.png 2x" type="image/png"><img src="/kevin schmid unsplash.jpg"></picture>
<picture><source srcset="/kevin%20schmid%20unsplash-600w.png 600w, /kevin%20schmid%20unsplash-600w@2.png 1200w" type="image/png"><img src="/kevin schmid unsplash.jpg"></picture>
</div>


<picture>
<source srcset="/kevin%20schmid%20unsplash-600w.avif, /kevin%20schmid%20unsplash-600w@2.avif 2x" type="image/avif"><source srcset="/kevin%20schmid%20unsplash-600w.webp, /kevin%20schmid%20unsplash-600w@2.webp 2x" type="image/webp"><source srcset="/kevin%20schmid%20unsplash-600w.jpg, /kevin%20schmid%20unsplash-600w@2.jpg 2x" type="image/jpeg"><img src="/kevin schmid unsplash.jpg">
<source srcset="/kevin%20schmid%20unsplash-600w.avif 600w, /kevin%20schmid%20unsplash-600w@2.avif 1200w" type="image/avif"><source srcset="/kevin%20schmid%20unsplash-600w.webp 600w, /kevin%20schmid%20unsplash-600w@2.webp 1200w" type="image/webp"><source srcset="/kevin%20schmid%20unsplash-600w.jpg 600w, /kevin%20schmid%20unsplash-600w@2.jpg 1200w" type="image/jpeg"><img src="/kevin schmid unsplash.jpg">
</picture>

<!-- This image will be converted to a picture -->
<picture><source srcset="/kevin%20schmid%20unsplash-300w.avif, /kevin%20schmid%20unsplash-300w@2.avif 2x" type="image/avif"><source srcset="/kevin%20schmid%20unsplash-300w.webp, /kevin%20schmid%20unsplash-300w@2.webp 2x" type="image/webp"><source srcset="/kevin%20schmid%20unsplash-300w.jpg, /kevin%20schmid%20unsplash-300w@2.jpg 2x" type="image/jpeg"><img src="/kevin schmid unsplash.jpg"></picture>
<picture><source srcset="/kevin%20schmid%20unsplash-300w.avif 300w, /kevin%20schmid%20unsplash-300w@2.avif 600w" type="image/avif"><source srcset="/kevin%20schmid%20unsplash-300w.webp 300w, /kevin%20schmid%20unsplash-300w@2.webp 600w" type="image/webp"><source srcset="/kevin%20schmid%20unsplash-300w.jpg 300w, /kevin%20schmid%20unsplash-300w@2.jpg 600w" type="image/jpeg"><img src="/kevin schmid unsplash.jpg"></picture>


</body></html>',
Expand Down