Letterbox oversized focal point crops in embed mode and sync focal points between Embed and Download-and-sync modes
>>> [!note] Migrated issue
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<!-- Migrated from issue #3624193. -->
Reported by: [rohan-sinha](https://www.drupal.org/user/3707347)
Related to !358
>>>
<p>Problem/Motivation</p>
<p>Embed mode ignores the focal point when the requested crop box is at least as large as<br>
the source: getFocalPointCropParameters() returns an empty array, so the widen.net URL<br>
carries no crop parameters at all instead of letterboxing the way Drupal's own image<br>
pipeline does. Separately, a focal point set in Embed mode is not carried onto the<br>
Download-and-sync file crop, and one set with the native image widget in<br>
Download-and-sync mode is not carried onto the embed styles, so switching a media type's<br>
render mode loses it.</p>
<p>Steps to reproduce</p>
<p>1. Create an image style with a focal_point_crop effect, e.g. width 3000 height 2000, and<br>
attach it to a media type using the Acquia DAM embed code formatter. Use an asset larger<br>
than 2048px, e.g. 4000x3000, and set a focal point on the media item.<br>
2. Render the media item and inspect the generated widen.net URL. Source dimensions cap to<br>
2048x1536, the 3000x2000 box caps to 2048x2000, so 2000 >= 1536 and no parameters are<br>
emitted.<br>
3. On a media type with download_assets enabled and the same 4000x3000 asset, set a focal<br>
point with the native image widget, then switch the type to embed mode (or inspect the<br>
embed crops directly).</p>
<p>Expected: the URL is letterboxed into the requested box (crop=no, w, h, color), matching<br>
Drupal's own rendering of the same style; and the focal point follows the asset across<br>
render modes.<br>
Actual: the URL contains no crop parameters and the uncropped original is displayed with<br>
the focal point ignored; and the focal point exists only in the mode where it was set.</p>
<p>Proposed resolution</p>
<p>Return letterbox parameters instead of an empty array when the box reaches or exceeds the<br>
source, after capping the requested box with getDimensionValue() (2048px) so the<br>
comparison matches every other branch in mapImageEffects(). Split the focal point<br>
conversions by coordinate space - ...Embed() methods for "acquia-dam://styles/..." rows<br>
(2048px clamped) and ...File() methods for local file crops (true pixels) - and add<br>
setFocalPointOnFile() / syncFocalPointFromFileToEmbedStyles() to carry a focal point<br>
between them, guarded so a file crop the editor set is never overwritten. Also cast the<br>
anchor offset to int and guard a zero source width (DivisionByZeroError).</p>
<p>User interface changes</p>
<p>None. The focal point element stays embed-only; no form elements are added or altered.</p>
<p>API changes</p>
<p>relativeToAbsolute() / absoluteToRelative() are renamed to relativeToAbsoluteEmbed() /<br>
absoluteToRelativeEmbed(), the CropInterface parameter and internal save are dropped, and<br>
persistence moves to applyAbsoluteToCrop(). New public methods: relativeToAbsoluteFile(),<br>
absoluteToRelativeFile(), setFocalPointOnFile(),<br>
syncFocalPointFromFileToEmbedStyles(), getDownloadedFile(), getImageDimensions(). No<br>
deprecated wrappers are included; happy to add them for one release if preferred.</p>
<p>Behaviour change to note: for a style whose crop box reaches or exceeds the capped source,<br>
the embed URL changes from no crop parameters to crop=no&w=...&h=...&color=000000.</p>
<p>Data model changes</p>
<p>None. No new entity types, fields, schema or configuration.</p>
issue
GitLab AI Context
Project: project/acquia_dam
Instance: https://git.drupalcode.org
Before proposing or making any changes, READ each of these files and FOLLOW their guidance:
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Repository: https://git.drupalcode.org/project/acquia_dam
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