зеркало из https://github.com/mozilla/gecko-dev.git
84 строки
2.9 KiB
C++
84 строки
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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_image_MultipartImage_h
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#define mozilla_image_MultipartImage_h
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#include "ImageWrapper.h"
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#include "IProgressObserver.h"
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#include "ProgressTracker.h"
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namespace mozilla {
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namespace image {
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class NextPartObserver;
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/**
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* An Image wrapper that implements support for multipart/x-mixed-replace
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* images.
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*/
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class MultipartImage : public ImageWrapper, public IProgressObserver {
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public:
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MOZ_DECLARE_REFCOUNTED_TYPENAME(MultipartImage)
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// We need to always declare refcounting here, because
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// IProgressObserver has pure-virtual refcounting.
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NS_DECL_ISUPPORTS_INHERITED
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void BeginTransitionToPart(Image* aNextPart);
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// Overridden ImageWrapper methods:
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virtual already_AddRefed<imgIContainer> Unwrap() override;
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virtual already_AddRefed<ProgressTracker> GetProgressTracker() override;
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virtual void SetProgressTracker(ProgressTracker* aTracker) override;
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virtual nsresult OnImageDataAvailable(nsIRequest* aRequest,
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nsISupports* aContext,
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nsIInputStream* aInStr,
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uint64_t aSourceOffset,
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uint32_t aCount) override;
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virtual nsresult OnImageDataComplete(nsIRequest* aRequest,
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nsISupports* aContext, nsresult aStatus,
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bool aLastPart) override;
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// We don't support locking or track animation consumers for individual parts,
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// so we override these methods to do nothing.
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NS_IMETHOD LockImage() override { return NS_OK; }
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NS_IMETHOD UnlockImage() override { return NS_OK; }
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virtual void IncrementAnimationConsumers() override {}
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virtual void DecrementAnimationConsumers() override {}
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#ifdef DEBUG
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virtual uint32_t GetAnimationConsumers() override { return 1; }
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#endif
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// Overridden IProgressObserver methods:
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virtual void Notify(int32_t aType, const nsIntRect* aRect = nullptr) override;
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virtual void OnLoadComplete(bool aLastPart) override;
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virtual void SetHasImage() override;
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virtual bool NotificationsDeferred() const override;
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virtual void MarkPendingNotify() override;
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virtual void ClearPendingNotify() override;
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protected:
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virtual ~MultipartImage();
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private:
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friend class ImageFactory;
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friend class NextPartObserver;
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explicit MultipartImage(Image* aFirstPart);
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void Init();
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void FinishTransition();
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RefPtr<ProgressTracker> mTracker;
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RefPtr<NextPartObserver> mNextPartObserver;
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RefPtr<Image> mNextPart;
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bool mPendingNotify : 1;
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};
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} // namespace image
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} // namespace mozilla
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#endif // mozilla_image_MultipartImage_h
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