Bug 79768 – Methods in ShadowTree and TreeScopeAdopter should be multiple shadow roots aware.

• Component: Layout and Rendering
• Status: RESOLVED FIXED

[Roland Steiner]

ShadowTree::recalcShadowTreeStyle only updates the youngest tree - shouldn't it update all?

[Shinya Kawanaka]

Thanks for the report! I'll check it later.

[Hajime Morrita]

Searching youngestShadowRoot(), it turns out some other functions
like following is also need to be multiple-shadow-aware.

- bool ShadowTree::needsStyleRecalc()  
- bool ShadowTree::childNeedsStyleRecalc() 
- bool ShadowTree::needsReattachHostChildrenAndShadow()
- void ShadowTree::hostChildrenChanged()  
- void TreeScopeAdopter::moveTreeToNewScope(Node* root)
- void TreeScopeAdopter::moveTreeToNewDocument(Node* root, Document* oldDocument, Document* newDocument) const

[Shinya Kawanaka]

(In reply to comment #2)
> Searching youngestShadowRoot(), it turns out some other functions
> like following is also need to be multiple-shadow-aware.
> 
> - bool ShadowTree::needsStyleRecalc()  
> - bool ShadowTree::childNeedsStyleRecalc() 
> - bool ShadowTree::needsReattachHostChildrenAndShadow()
> - void ShadowTree::hostChildrenChanged()  
> - void TreeScopeAdopter::moveTreeToNewScope(Node* root)
> - void TreeScopeAdopter::moveTreeToNewDocument(Node* root, Document* oldDocument, Document* newDocument) const

I think we should consider multiple shadow subtrees for needsStyleRecalc() and childNeedsStyleRecalc(),
but not for needsReattachHostChildrenAndShadow() and needsReattachHostChildrenAndShadow(),
because the latter methods checks the existence of InsertionPoint of the youngest shadow roots. If there is no insertion point in the youngest shadow root, older shadow subtrees or light children won't be rendered al all.
If this assumption is wrong, please let me know...

[Shinya Kawanaka]

Created attachment 129407 [details]
Patch

[Shinya Kawanaka]

Created attachment 129408 [details]
Patch

[WebKit Review Bot]

Attachment 129408 [details] did not pass style-queue:

Failed to run "['Tools/Scripts/update-webkit']" exit_code: 9

Updating OpenSource
Index mismatch: 45f1ddc97c26c8f168daebf1d8d25e32afde0c7a != d0c2d29a78e61f43d073201c516920e3103f993d
rereading 21dd0231e92234ee59517801b9836dc9d53fe30a
	M	Source/WebCore/dom/ShadowTree.h
	M	Source/WebCore/dom/Element.cpp
	M	Source/WebCore/dom/ShadowTree.cpp
	M	Source/WebCore/dom/ContainerNode.cpp
	M	Source/WebCore/dom/ContainerNode.h
	M	Source/WebCore/ChangeLog
109203 = f269c80d877021b19c2311e4e7c7a1dc9d95a3b8 already exists! Why are we refetching it?
 at /usr/lib/git-core/git-svn line 5210

Died at Tools/Scripts/update-webkit line 164.


If any of these errors are false positives, please file a bug against check-webkit-style.

[WebKit Review Bot]

Comment on attachment 129408 [details]
Patch

Rejecting attachment 129408 [details] from commit-queue.

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[Shinya Kawanaka]

Created attachment 129435 [details]
Wrong patch

[Shinya Kawanaka]

(In reply to comment #8)
> Created an attachment (id=129435) [details]
> Patch

Sorry, I mistook the place to upload...

[Shinya Kawanaka]

Created attachment 129561 [details]
Patch for landing

[Shinya Kawanaka]

Created attachment 129563 [details]
Patch for landing

[Shinya Kawanaka]

Committed r109290: <http://trac.webkit.org/changeset/109290>