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Bug 1409975 - Implement node distribution for shadow tree slots

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* Implementation for assignedNodes
* Include slots in the flat tree
* Fix event get-the-parent algorithm for a node
* Update and add reftests for Shadow DOM v1
* Update web platform tests expectations

Tag #1375
This commit is contained in:
Matt A. Tobin 2020-04-17 07:10:54 -04:00 • committed by Roy Tam
commit cab78760e5
49 changed files with 775 additions and 429 deletions
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8
dom/base/nsContentUtils.cpp
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@ -44,6 +44,7 @@
#include "mozilla/dom/Element.h"
#include "mozilla/dom/FileSystemSecurity.h"
#include "mozilla/dom/HTMLMediaElement.h"
#include "mozilla/dom/HTMLSlotElement.h"
#include "mozilla/dom/HTMLTemplateElement.h"
#include "mozilla/dom/ipc/BlobChild.h"
#include "mozilla/dom/ipc/BlobParent.h"
@ -7053,6 +7054,13 @@ nsContentUtils::HasDistributedChildren(nsIContent* aContent)
return true;
}
HTMLSlotElement* slotEl = HTMLSlotElement::FromContent(aContent);
if (slotEl && slotEl->GetContainingShadow()) {
// Children of a slot are rendered if the slot does not have any assigned
// nodes (fallback content).
return slotEl->AssignedNodes().IsEmpty();
}
return false;
}