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Bug 1425769 - Base class for ShadowRoot and Document to manage style state

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Tag #1375
This commit is contained in:
Matt A. Tobin 2020-04-17 07:42:07 -04:00 • committed by Roy Tam
commit b8260c664a
16 changed files with 250 additions and 296 deletions
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23
dom/base/StyleSheetList.cpp
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@ -8,6 +8,7 @@
#include "mozilla/CSSStyleSheet.h"
#include "mozilla/dom/StyleSheetListBinding.h"
#include "nsStubDocumentObserver.h"
namespace mozilla {
namespace dom {
@ -17,7 +18,8 @@ NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(StyleSheetList)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(StyleSheetList)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsIDOMStyleSheetList)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY(nsIMutationObserver)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMStyleSheetList)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(StyleSheetList)
@ -43,5 +45,24 @@ StyleSheetList::SlowItem(uint32_t aIndex, nsIDOMStyleSheet** aItem)
return NS_OK;
}
void
StyleSheetList::NodeWillBeDestroyed(const nsINode* aNode)
{
mStyleScope = nullptr;
}
StyleSheetList::StyleSheetList(StyleScope& aScope)
: mStyleScope(&aScope)
{
mStyleScope->AsNode().AddMutationObserver(this);
}
StyleSheetList::~StyleSheetList()
{
if (mStyleScope) {
mStyleScope->AsNode().RemoveMutationObserver(this);
}
}
} // namespace dom
} // namespace mozilla