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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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44
dom/base/StyleSheetList.h
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@ -7,8 +7,10 @@
#ifndef mozilla_dom_StyleSheetList_h
#define mozilla_dom_StyleSheetList_h
#include "mozilla/dom/StyleScope.h"
#include "nsIDOMStyleSheetList.h"
#include "nsWrapperCache.h"
#include "nsStubDocumentObserver.h"
class nsINode;
@ -17,28 +19,54 @@ class StyleSheet;
namespace dom {
class StyleSheetList : public nsIDOMStyleSheetList
, public nsWrapperCache
class StyleSheetList final : public nsIDOMStyleSheetList
, public nsWrapperCache
, public nsStubDocumentObserver
{
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(StyleSheetList)
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(StyleSheetList, nsIDOMStyleSheetList)
NS_DECL_NSIDOMSTYLESHEETLIST
NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED
explicit StyleSheetList(StyleScope& aScope);
virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override final;
virtual nsINode* GetParentObject() const = 0;
nsINode* GetParentObject() const
{
return mStyleScope ? &mStyleScope->AsNode() : nullptr;
}
virtual uint32_t Length() = 0;
virtual StyleSheet* IndexedGetter(uint32_t aIndex, bool& aFound) = 0;
StyleSheet* Item(uint32_t aIndex)
uint32_t Length() const
{
return mStyleScope ? mStyleScope->SheetCount() : 0;
}
StyleSheet* IndexedGetter(uint32_t aIndex, bool& aFound) const
{
if (!mStyleScope) {
aFound = false;
return nullptr;
}
StyleSheet* sheet = mStyleScope->SheetAt(aIndex);
aFound = !!sheet;
return sheet;
}
StyleSheet* Item(uint32_t aIndex) const
{
bool dummy = false;
return IndexedGetter(aIndex, dummy);
}
protected:
virtual ~StyleSheetList() {}
virtual ~StyleSheetList();
StyleScope* mStyleScope; // Weak, cleared on "NodeWillBeDestroyed".
};
} // namespace dom