235101 2022-01-12 02:26:16 -0800 [LBSE] Introduce SVGContainerLayout 2022-01-14 01:44:18 -0800 1 1 1 Unclassified WebKit SVG WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 235099 235100 90738 1 zimmermann zimmermann changseok dino esprehn+autocc ews-watchlist fmalita glenn gyuyoung.kim kondapallykalyan pdr rbuis sabouhallawa schenney sergio webkit-bug-importer zimmermann oldest_to_newest 1830048 0 zimmermann 2022-01-12 02:26:16 -0800 SVGContainerLayout contains the implementation for the two-pass layout procedure, as described in the technical design document. The container-children-layout procedure was spread over SVGRenderSupport before and is now in a central place for LBSE. 1830094 1 448935 zimmermann 2022-01-12 05:14:13 -0800 Created attachment 448935 Patch, v1 1830495 2 448935 rbuis 2022-01-13 01:46:11 -0800 Comment on attachment 448935 Patch, v1 View in context: https://bugs.webkit.org/attachment.cgi?id=448935&action=review > Source/WebCore/ChangeLog:17 > + Currently the functionality is not observable yet, as we don't create Probably remove the first 'yet'. > Source/WebCore/rendering/svg/SVGContainerLayout.cpp:99 > + bool childNeededLayout = child.needsLayout(); Is it possible that childNeededLayout != needsLayout here? > Source/WebCore/rendering/svg/SVGContainerLayout.h:44 > + static bool transformToRootChanged(const RenderObject* ancestor); Do these 2 need to be public? > Source/WebCore/rendering/svg/SVGContainerLayout.h:47 > + void layoutDifferentRootIfNeeded(const RenderElement&); Different from what? 1830833 3 449144 zimmermann 2022-01-14 00:41:29 -0800 Created attachment 449144 Patch, v2 1830834 4 zimmermann 2022-01-14 00:41:34 -0800 (In reply to Rob Buis from comment #2) > > Source/WebCore/ChangeLog:17 > > + Currently the functionality is not observable yet, as we don't create > > Probably remove the first 'yet'. Fixed. > > Source/WebCore/rendering/svg/SVGContainerLayout.cpp:99 > > + bool childNeededLayout = child.needsLayout(); > > Is it possible that childNeededLayout != needsLayout here? Yes, there are cases where e.g. a text renderer did not originally need layout, but we force a relayout, e.g. if transform to root changes (on-screen scaling factor for text rendering -- which is an ugly topic that we should gt rid of in the future). > > > Source/WebCore/rendering/svg/SVGContainerLayout.h:44 > > + static bool transformToRootChanged(const RenderObject* ancestor); > > Do these 2 need to be public? Yes, they are used in other places in LBSE branch. > > > Source/WebCore/rendering/svg/SVGContainerLayout.h:47 > > + void layoutDifferentRootIfNeeded(const RenderElement&); > > Different from what? Different from the layout root belonging to the passed RenderElement... Used for cases like referencing a SVG filter from a different document. I agree the naming is not wise, though it's using existing terminology from SVGResources, which we do want to re-visit in future. SVGResources are mostly obsolete in LBSE, after all clipper/masker/filter... applyResource are all no-ops in LBSE as opposed to the legacy engine, since clipping/masking/filtering is handled via RenderLayer in LBSE. Anyhow, I'd like to keep the existing terminology for now, in order not to open another construction site. 1830838 5 rbuis 2022-01-14 01:07:06 -0800 (In reply to Nikolas Zimmermann from comment #4) > > Different from what? > Different from the layout root belonging to the passed RenderElement... > Used for cases like referencing a SVG filter from a different document. > > I agree the naming is not wise, though it's using existing terminology from > SVGResources, which we do want to re-visit in future. SVGResources are > mostly obsolete in LBSE, after all clipper/masker/filter... applyResource > are all no-ops in LBSE as opposed to the legacy engine, since > clipping/masking/filtering is handled via RenderLayer in LBSE. That is great to hear! 1830843 6 zimmermann 2022-01-14 01:43:17 -0800 Committed r288011 (246037@trunk): <https://commits.webkit.org/246037@trunk> 1830844 7 webkit-bug-importer 2022-01-14 01:44:18 -0800 <rdar://problem/87592353> 448935 2022-01-12 05:14:13 -0800 2022-01-14 00:41:24 -0800 Patch, v1 bug-235101-20220112051412.patch text/plain 26359 zimmermann U3VidmVyc2lvbiBSZXZpc2lvbjogMjg3OTIwCmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggNWFmZWJjYTAzODFjNDc5 NDgyZDdlMjJiNWM4NjZiMGU3ZjA4MDhlMC4uYmUzZmZhY2ZjYWNjZTk1NmVhNWNmNWZhNTAyM2Y3 YTRkMzdhZmE0ZCAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJDb3JlL0NoYW5nZUxvZwpAQCAtMSwzICsxLDQ1IEBACisyMDIyLTAxLTEyICBOaWtv bGFzIFppbW1lcm1hbm4gIDxuemltbWVybWFubkBpZ2FsaWEuY29tPgorCisgICAgICAgIFtMQlNF XSBJbnRyb2R1Y2UgU1ZHQ29udGFpbmVyTGF5b3V0CisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJr aXQub3JnL3Nob3dfYnVnLmNnaT9pZD0yMzUxMDEKKworICAgICAgICBSZXZpZXdlZCBieSBOT0JP 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