layout: Refactor box size computation #49748
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Consider:
```html
<div style="position: relative; width: 50px; height: 50px; border: solid; margin: 5px">
<div style="position: absolute; top: 0; bottom: 0; height: max-content">
<canvas width="25" height="25" style="background: cyan; height: 100%"></canvas>
</div>
</div>
```
In order to determine the inline min/max-content sizes, we need a
tentative block size as the input, which only takes extrinsic values
into account.
In this case `height: max-content` is intrinsic, so we were treating it
as `height: initial`, which would behave as a definite `height: stretch`.
Therefore, the canvas was able to resolve its percentage.
However, it seems weird to treat an explicitly intrinsic keyword in an
extrinsic way, and Blink doesn't do it. So now we treat the tentative
block size as indefinite, therefore the percentage behaves as auto.
This adds a new test, we were previously failing 6 subtests, now only 3.
Signed-off-by: Oriol Brufau <[email protected]>
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👋 Downstream pull request (servo/servo#34671) no longer contains any upstreamable changes. Closing pull request without merging. |
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#32853 has been adding quite a bit of boilerplate that keeps repeating in each layout logic, in order to correctly resolve sizing keywords.
This patch adds a new
Sizesstruct which holds the preferred, min and max sizing values for one axis, and unifies the logic to resolve the final size into there.Reviewed in servo/servo#34671