2fbd4d89f9
This implements some basic snapshotting functionality, and hooks it to the ::view-transition-old pseudo-elements. Some tests that now fail because we start rendering the old snapshot, but not at the right position, as for now the view transition pseudo tree is all statically-positioned. That's all expected for now until we implement the right styling for them, the top layer behavior, etc. Main remaining question is how to get a hand on the right layer manager from nsImageFrame::Destroy. Differential Revision: https://phabricator.services.mozilla.com/D231977
122 lines
3.3 KiB
C++
122 lines
3.3 KiB
C++
/* 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_ViewTransition_h
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#define mozilla_dom_ViewTransition_h
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#include "nsRect.h"
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#include "nsWrapperCache.h"
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#include "nsAtomHashKeys.h"
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#include "nsClassHashtable.h"
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class nsIGlobalObject;
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class nsITimer;
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namespace mozilla {
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class ErrorResult;
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namespace gfx {
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class DataSourceSurface;
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}
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namespace dom {
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class Document;
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class Element;
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class Promise;
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class ViewTransitionUpdateCallback;
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enum class SkipTransitionReason : uint8_t {
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JS,
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DocumentHidden,
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ClobberedActiveTransition,
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Timeout,
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UpdateCallbackRejected,
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DuplicateTransitionNameCapturingOldState,
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DuplicateTransitionNameCapturingNewState,
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Resize,
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};
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// https://drafts.csswg.org/css-view-transitions-1/#viewtransition-phase
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enum class ViewTransitionPhase : uint8_t {
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PendingCapture = 0,
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UpdateCallbackCalled,
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Animating,
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Done,
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};
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class ViewTransition final : public nsISupports, public nsWrapperCache {
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public:
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using Phase = ViewTransitionPhase;
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(ViewTransition)
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ViewTransition(Document&, ViewTransitionUpdateCallback*);
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Promise* GetUpdateCallbackDone(ErrorResult&);
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Promise* GetReady(ErrorResult&);
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Promise* GetFinished(ErrorResult&);
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void SkipTransition(SkipTransitionReason = SkipTransitionReason::JS);
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void PerformPendingOperations();
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Element* GetRoot() const { return mViewTransitionRoot; }
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gfx::DataSourceSurface* GetOldSurface(nsAtom* aName) const;
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nsIGlobalObject* GetParentObject() const;
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JSObject* WrapObject(JSContext*, JS::Handle<JSObject*> aGivenProto) override;
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struct CapturedElement;
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private:
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enum class CallIfDone : bool { No, Yes };
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MOZ_CAN_RUN_SCRIPT void CallUpdateCallbackIgnoringErrors(CallIfDone);
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MOZ_CAN_RUN_SCRIPT void CallUpdateCallback(ErrorResult&);
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void Activate();
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void ClearActiveTransition();
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void Timeout();
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void Setup();
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[[nodiscard]] Maybe<SkipTransitionReason> CaptureOldState();
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[[nodiscard]] Maybe<SkipTransitionReason> CaptureNewState();
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void SetupTransitionPseudoElements();
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void ClearNamedElements();
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void HandleFrame();
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void SkipTransition(SkipTransitionReason, JS::Handle<JS::Value>);
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void ClearTimeoutTimer();
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nsRect SnapshotContainingBlockRect() const;
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~ViewTransition();
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// Stored for the whole lifetime of the object (until CC).
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RefPtr<Document> mDocument;
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RefPtr<ViewTransitionUpdateCallback> mUpdateCallback;
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// https://drafts.csswg.org/css-view-transitions/#viewtransition-named-elements
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using NamedElements = nsClassHashtable<nsAtomHashKey, CapturedElement>;
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NamedElements mNamedElements;
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// https://drafts.csswg.org/css-view-transitions/#viewtransition-initial-snapshot-containing-block-size
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nsSize mInitialSnapshotContainingBlockSize;
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// Allocated lazily, but same object once allocated (again until CC).
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RefPtr<Promise> mUpdateCallbackDonePromise;
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RefPtr<Promise> mReadyPromise;
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RefPtr<Promise> mFinishedPromise;
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static void TimeoutCallback(nsITimer*, void*);
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RefPtr<nsITimer> mTimeoutTimer;
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Phase mPhase = Phase::PendingCapture;
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RefPtr<Element> mViewTransitionRoot;
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};
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} // namespace dom
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} // namespace mozilla
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#endif
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