tree 0d28662f57b35ae35141698dca1f3964968c8edd
parent 16bf5b6d3911391d26aa2ef5c753d025e18d2d34
author zalan@apple.com <zalan@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1574890917 +0000
committer zalan@apple.com <zalan@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1574890917 +0000

[LFC] Run layout on the root when InvalidationState is empty.
https://bugs.webkit.org/show_bug.cgi?id=204651
<rdar://problem/57509616>

Reviewed by Antti Koivisto.

InvalidationState captures style/tree mutation related changes. An empty InvalidationState indicates that the horizontal constraint changed
and we need to initiate a layout on the ICB (and the layout logic will propagate the damage down on the tree).

* layout/LayoutContext.cpp:
(WebCore::Layout::LayoutContext::layout):
* layout/RenderBlockFlowLineLayout.cpp:
(WebCore::Layout::RenderBlockFlowLineLayout::layout):
* layout/layouttree/LayoutTreeBuilder.cpp:
(WebCore::Layout::printLayoutTreeForLiveDocuments):
* page/FrameViewLayoutContext.cpp:
(WebCore::FrameViewLayoutContext::layoutUsingFormattingContext):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@252912 268f45cc-cd09-0410-ab3c-d52691b4dbfc