mirror of
https://github.com/classilla/tenfourfox.git
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249 lines
7.5 KiB
C++
249 lines
7.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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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_imgRequestProxy_h
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#define mozilla_image_imgRequestProxy_h
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#include "imgIRequest.h"
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#include "nsISecurityInfoProvider.h"
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#include "nsILoadGroup.h"
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#include "nsISupportsPriority.h"
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#include "nsITimedChannel.h"
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#include "nsCOMPtr.h"
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#include "nsThreadUtils.h"
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#include "mozilla/TimeStamp.h"
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#include "mozilla/UniquePtr.h"
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#include "mozilla/gfx/Rect.h"
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#include "imgRequest.h"
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#include "IProgressObserver.h"
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#define NS_IMGREQUESTPROXY_CID \
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{ /* 20557898-1dd2-11b2-8f65-9c462ee2bc95 */ \
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0x20557898, \
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0x1dd2, \
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0x11b2, \
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{0x8f, 0x65, 0x9c, 0x46, 0x2e, 0xe2, 0xbc, 0x95} \
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}
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class imgINotificationObserver;
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class imgStatusNotifyRunnable;
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class ProxyBehaviour;
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namespace mozilla {
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namespace image {
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class Image;
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class ImageURL;
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class ProgressTracker;
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} // namespace image
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} // namespace mozilla
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class imgRequestProxy : public imgIRequest,
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public mozilla::image::IProgressObserver,
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public nsISupportsPriority,
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public nsISecurityInfoProvider,
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public nsITimedChannel
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{
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protected:
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virtual ~imgRequestProxy();
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public:
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typedef mozilla::image::Image Image;
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typedef mozilla::image::ImageURL ImageURL;
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typedef mozilla::image::ProgressTracker ProgressTracker;
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MOZ_DECLARE_REFCOUNTED_TYPENAME(imgRequestProxy)
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NS_DECL_ISUPPORTS
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NS_DECL_IMGIREQUEST
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NS_DECL_NSIREQUEST
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NS_DECL_NSISUPPORTSPRIORITY
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NS_DECL_NSISECURITYINFOPROVIDER
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// nsITimedChannel declared below
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imgRequestProxy();
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// Callers to Init or ChangeOwner are required to call NotifyListener after
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// (although not immediately after) doing so.
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nsresult Init(imgRequest* aOwner,
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nsILoadGroup* aLoadGroup,
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ImageURL* aURI,
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imgINotificationObserver* aObserver);
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nsresult ChangeOwner(imgRequest* aNewOwner); // this will change mOwner.
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// Do not call this if the
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// previous owner has already
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// sent notifications out!
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void AddToLoadGroup();
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void RemoveFromLoadGroup(bool releaseLoadGroup);
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inline bool HasObserver() const {
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return mListener != nullptr;
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}
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// Asynchronously notify this proxy's listener of the current state of the
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// image, and, if we have an imgRequest mOwner, any status changes that
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// happen between the time this function is called and the time the
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// notification is scheduled.
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void NotifyListener();
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// Synchronously notify this proxy's listener of the current state of the
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// image. Only use this function if you are currently servicing an
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// asynchronously-called function.
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void SyncNotifyListener();
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// imgINotificationObserver methods:
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virtual void Notify(int32_t aType,
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const mozilla::gfx::IntRect* aRect = nullptr) override;
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virtual void OnLoadComplete(bool aLastPart) override;
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// imgIOnloadBlocker methods:
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virtual void BlockOnload() override;
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virtual void UnblockOnload() override;
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// Other, internal-only methods:
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virtual void SetHasImage() override;
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// Whether we want notifications from ProgressTracker to be deferred until
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// an event it has scheduled has been fired.
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virtual bool NotificationsDeferred() const override
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{
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return mDeferNotifications;
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}
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virtual void SetNotificationsDeferred(bool aDeferNotifications) override
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{
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mDeferNotifications = aDeferNotifications;
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}
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// Removes all animation consumers that were created with
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// IncrementAnimationConsumers. This is necessary since we need
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// to do it before the proxy itself is destroyed. See
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// imgRequest::RemoveProxy
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void ClearAnimationConsumers();
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virtual nsresult Clone(imgINotificationObserver* aObserver,
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imgRequestProxy** aClone);
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nsresult GetStaticRequest(imgRequestProxy** aReturn);
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nsresult GetURI(ImageURL** aURI);
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protected:
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friend class mozilla::image::ProgressTracker;
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friend class imgStatusNotifyRunnable;
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class imgCancelRunnable;
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friend class imgCancelRunnable;
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class imgCancelRunnable : public nsRunnable
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{
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public:
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imgCancelRunnable(imgRequestProxy* owner, nsresult status)
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: mOwner(owner), mStatus(status)
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{ }
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NS_IMETHOD Run() override {
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mOwner->DoCancel(mStatus);
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return NS_OK;
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}
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private:
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RefPtr<imgRequestProxy> mOwner;
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nsresult mStatus;
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};
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/* Finish up canceling ourselves */
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void DoCancel(nsresult status);
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/* Do the proper refcount management to null out mListener */
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void NullOutListener();
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void DoRemoveFromLoadGroup() {
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RemoveFromLoadGroup(true);
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}
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// Return the ProgressTracker associated with mOwner and/or mImage. It may
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// live either on mOwner or mImage, depending on whether
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// (a) we have an mOwner at all
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// (b) whether mOwner has instantiated its image yet
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already_AddRefed<ProgressTracker> GetProgressTracker() const;
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nsITimedChannel* TimedChannel()
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{
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if (!GetOwner()) {
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return nullptr;
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}
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return GetOwner()->GetTimedChannel();
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}
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already_AddRefed<Image> GetImage() const;
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bool HasImage() const;
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imgRequest* GetOwner() const;
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nsresult PerformClone(imgINotificationObserver* aObserver,
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imgRequestProxy* (aAllocFn)(imgRequestProxy*),
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imgRequestProxy** aClone);
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public:
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NS_FORWARD_SAFE_NSITIMEDCHANNEL(TimedChannel())
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protected:
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mozilla::UniquePtr<ProxyBehaviour> mBehaviour;
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private:
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friend class imgCacheValidator;
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friend imgRequestProxy* NewStaticProxy(imgRequestProxy* aThis);
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// The URI of our request.
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RefPtr<ImageURL> mURI;
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// mListener is only promised to be a weak ref (see imgILoader.idl),
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// but we actually keep a strong ref to it until we've seen our
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// first OnStopRequest.
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imgINotificationObserver* MOZ_UNSAFE_REF("Observers must call Cancel() or "
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"CancelAndForgetObserver() before "
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"they are destroyed") mListener;
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nsCOMPtr<nsILoadGroup> mLoadGroup;
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nsLoadFlags mLoadFlags;
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uint32_t mLockCount;
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uint32_t mAnimationConsumers;
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bool mCanceled;
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bool mIsInLoadGroup;
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bool mListenerIsStrongRef;
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bool mDecodeRequested;
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// Whether we want to defer our notifications by the non-virtual Observer
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// interfaces as image loads proceed.
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bool mDeferNotifications;
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};
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// Used for static image proxies for which no requests are available, so
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// certain behaviours must be overridden to compensate.
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class imgRequestProxyStatic : public imgRequestProxy
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{
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public:
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imgRequestProxyStatic(Image* aImage, nsIPrincipal* aPrincipal);
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NS_IMETHOD GetImagePrincipal(nsIPrincipal** aPrincipal) override;
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using imgRequestProxy::Clone;
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virtual nsresult Clone(imgINotificationObserver* aObserver,
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imgRequestProxy** aClone) override;
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protected:
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friend imgRequestProxy* NewStaticProxy(imgRequestProxy*);
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// Our principal. We have to cache it, rather than accessing the underlying
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// request on-demand, because static proxies don't have an underlying request.
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nsCOMPtr<nsIPrincipal> mPrincipal;
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};
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#endif // mozilla_image_imgRequestProxy_h
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