Daniel Holbert 842b893fe3 Bug 1544121: Make size-contained replaced elements behave as if they had 0x0 intrinsic size and ratio. r=TYLin ... Spec quote from https://drafts.csswg.org/css-contain/#containment-size : "Replaced elements must be treated as having an intrinsic width and height of 0" To achieve that, we just need to: (a) make all of these frame classes' GetPrefISize and GetMinISize methods return 0 if they're styled with contain:size. (b) make all of these frame classes' GetIntrinsicSize() and GetIntrinsicRatio() methods return 0,0. In some cases, these methods are implemented in terms of common helper methods (and sometimes member variables). For those cases, this patch adjusts the helper methods (and variables) rather than the getters themselves. Also: in one case (nsHTMLCanvasFrame), I needed to update its ComputeSize method to remove a dependency on the "real" intrinsic size & ratio. I believe the other classes' ComputeSize implementations do the right thing automatically by sharing code & data with their intrinsic-size codepaths. Differential Revision: https://phabricator.services.mozilla.com/D28159 --HG-- rename : testing/web-platform/tests/media/white.webm => testing/web-platform/tests/css/css-contain/support/white.webm extra : moz-landing-system : lando		2019-04-26 00:18:32 +00:00
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blue50wBy25h.png	Bug 1490556 [wpt PR 12960] - [css-contain] Fix contain-size-025 using "dislay: block" on images, a=testonly	2018-09-13 02:59:37 +00:00
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white.webm	Bug 1544121: Make size-contained replaced elements behave as if they had 0x0 intrinsic size and ratio. r=TYLin	2019-04-26 00:18:32 +00:00