The label that is displayed inside a `<select>` element is that of the
selected option, or it's text contents if the option does not have a
label. Therefore, we need to update the `<select>` shadow tree when the
contents of the selected option change.
Testing: Covered by existing web platform tests
Fixes https://github.com/servo/servo/issues/36926
Fixes https://github.com/servo/servo/issues/36925
---------
Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>
https://github.com/user-attachments/assets/9aba75ff-4190-4a85-89ed-d3f3aa53d3b0
Among other things this adds a new `EmbedderMsg::ShowSelectElementMenu`
to tell the embedder to display a select popup at the given location.
This is a draft because some small style adjustments need to be made:
* the select element should always have the width of the largest option
* the border should be part of the shadow tree
Apart from that, it's mostly ready for review.
<details><summary>HTML for demo video</summary>
```html
<html>
<body>
<select id="c" name="choice">
<option value="first">First Value</option>
<option value="second">Second Value</option>
<option value="third">Third Value</option>
</select>
</body>
</html>
```
</details>
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---------
Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>
Improve the calculation of the block size of line boxes and all their
component elements. Even empty spans can increase the size of the line
based on their font-size. Elements that have a line-height should
increase the block size of the line, but that setting should not effect
their own size.
In addition to the new passes there are some new failures
Failing because a progression exposes the real issue these tests are
testing:
- css/css-color/t32-opacity-offscreen-multiple-boxes-1-c.xht
- css/css-color/t32-opacity-offscreen-multiple-boxes-2-c.xht
Likely failing because of vertical-align and another sizing issue:
- css/css-transforms/perspective-untransformable-no-stacking-context.html
Failing because a progression reveals another failure:
- html/rendering/non-replaced-elements/hidden-elements.html
Co-authored-by: Mukilan Thiyagarajan <mukilan@igalia.com>
Most tests were only being run for layout-2013, not for layout-2020.
This wasn't great since layout-2020 is now the default.
So this patch unifies the lists of included tests for both layouts.
For layout-2013 this implies adding css/css-content/, css/css-logical/
and css/css-masking/clip/.
For layout-2020 this implies adding several additional css tests, and
also tests like dom/, js/, html/, etc.
