forked from mirrors/gecko-dev
ebd0469a04
For these objects, we have an `Append(Foo*)` method which is just a wrapper-function that appends to a `nsTArray<RefPtr<Foo>>`. As it happens, every callsite is passing in a local `RefPtr` variable that's no longer needed after the call to `Append`. It's slightly more performant to use move-semantics to directly transfer ownership of the existing reference from the local variable to the array, rather than having the reference count take one step forward and then one step back, as we were doing before this patch. Differential Revision: https://phabricator.services.mozilla.com/D210364
79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_PaintRequest_h_
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#define mozilla_dom_PaintRequest_h_
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#include "nsPresContext.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/dom/Event.h"
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#include "nsWrapperCache.h"
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namespace mozilla::dom {
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class DOMRect;
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class PaintRequest final : public nsISupports, public nsWrapperCache {
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public:
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explicit PaintRequest(Event* aParent) : mParent(aParent) {}
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(PaintRequest)
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virtual JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) override;
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Event* GetParentObject() const { return mParent; }
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already_AddRefed<DOMRect> ClientRect();
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void GetReason(nsAString& aResult) const { aResult.AssignLiteral("repaint"); }
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void SetRequest(const nsRect& aRequest) { mRequest = aRequest; }
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private:
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~PaintRequest() = default;
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RefPtr<Event> mParent;
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nsRect mRequest;
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};
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class PaintRequestList final : public nsISupports, public nsWrapperCache {
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public:
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explicit PaintRequestList(Event* aParent) : mParent(aParent) {}
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(PaintRequestList)
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virtual JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) override;
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nsISupports* GetParentObject() { return mParent; }
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void Append(RefPtr<PaintRequest>&& aElement) {
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mArray.AppendElement(std::move(aElement));
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}
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uint32_t Length() { return mArray.Length(); }
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PaintRequest* Item(uint32_t aIndex) { return mArray.SafeElementAt(aIndex); }
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PaintRequest* IndexedGetter(uint32_t aIndex, bool& aFound) {
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aFound = aIndex < mArray.Length();
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if (!aFound) {
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return nullptr;
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}
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return mArray.ElementAt(aIndex);
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}
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private:
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~PaintRequestList() = default;
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nsTArray<RefPtr<PaintRequest> > mArray;
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RefPtr<Event> mParent;
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};
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} // namespace mozilla::dom
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#endif // mozilla_dom_PaintRequest_h_
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