Bug 249194 – Floats on an empty line should still get positioned

• Status: RESOLVED
• Resolution: CONFIGURATION CHANGED
• Component: Layout and Rendering

[Ahmad Saleem]

Hi Team,

While going through Blink's commit, I came across another failing test case (from set of two tests), it is failing in Safari 16.1, STP 159 and Firefox Nightly 109, while only Chrome Canary 110 is passing it.

Test Case - https://jsfiddle.net/ztmf9k2g/

Blink Commit - https://chromium.googlesource.com/chromium/blink/+/52a70a867a9bb674c261dfe9e69c7fe4feb47adc

Just wanted to raise this bug so it can be tracked and if possible to be merged.

Thanks!

[Ahmad Saleem]

https://github.com/WebKit/WebKit/blob/403e78eb6ddb81c1319cca7045b09199474573ed/Source/WebCore/rendering/LegacyLineLayout.cpp#L1363

&

https://github.com/WebKit/WebKit/blob/403e78eb6ddb81c1319cca7045b09199474573ed/Source/WebCore/rendering/LegacyLineLayout.cpp#L1517

&

https://github.com/WebKit/WebKit/blob/403e78eb6ddb81c1319cca7045b09199474573ed/Source/WebCore/rendering/LegacyLineLayout.cpp#L1872

&

https://github.com/WebKit/WebKit/blob/403e78eb6ddb81c1319cca7045b09199474573ed/Source/WebCore/rendering/LegacyLineLayout.cpp#L1905

&

https://github.com/WebKit/WebKit/blob/403e78eb6ddb81c1319cca7045b09199474573ed/Source/WebCore/rendering/LegacyLineLayout.cpp#L1945

_____

@Alan - should we fix this in Legacy Line Layout since you are working on IFC and this might be fixed in trunk already. Just wanted to get your opinion. Thanks!

[zalan]

Yeah, I think we are good. This is not asserting anymore in WebKit.

[Radar WebKit Bug Importer]

<rdar://problem/103536598>

[Ahmad Saleem]

We are now passing this on WebKit Trunk (261124@main). Just wanted to raise.

Appreciate if someone else can also confirm and then we can close this bug. It might be due to Sammy Rendering related fixes or Alan’s Partial Layout fixes.

[zalan]

(In reply to Ahmad Saleem from comment #4)
> We are now passing this on WebKit Trunk (261124@main). Just wanted to raise.
> 
> Appreciate if someone else can also confirm and then we can close this bug.
> It might be due to Sammy Rendering related fixes or Alan’s Partial Layout
> fixes.
I don't think there's been any work done in this area recently.
This bugs is about the float not being placed (ASSERT) which does not reproduce anymore (for a good while) on trunk because of IFC (IFC progression). This test also checks the container height but that assumes the "Ahem" font being installed on the system (30px vs. 33px). -Chrome fails too when "Ahem" is deactivated.
Let's close it.