зеркало из https://github.com/mozilla/gecko-dev.git
280 строки
10 KiB
C++
280 строки
10 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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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/*
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*/
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#ifndef nsDocLoader_h__
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#define nsDocLoader_h__
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#include "nsIDocumentLoader.h"
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#include "nsIWebProgress.h"
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#include "nsIWebProgressListener.h"
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#include "nsIRequestObserver.h"
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#include "nsWeakReference.h"
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#include "nsILoadGroup.h"
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#include "nsCOMArray.h"
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#include "nsVoidArray.h"
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#include "nsString.h"
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#include "nsIChannel.h"
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#include "nsIProgressEventSink.h"
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#include "nsIInterfaceRequestor.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsIChannelEventSink.h"
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#include "nsISecurityEventSink.h"
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#include "nsISupportsPriority.h"
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#include "nsCOMPtr.h"
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#include "pldhash.h"
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#include "prclist.h"
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#include "nsAutoPtr.h"
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struct nsRequestInfo;
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struct nsListenerInfo;
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/****************************************************************************
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* nsDocLoader implementation...
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****************************************************************************/
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#define NS_THIS_DOCLOADER_IMPL_CID \
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{ /* b4ec8387-98aa-4c08-93b6-6d23069c06f2 */ \
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0xb4ec8387, \
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0x98aa, \
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0x4c08, \
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{0x93, 0xb6, 0x6d, 0x23, 0x06, 0x9c, 0x06, 0xf2} \
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}
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class nsDocLoader : public nsIDocumentLoader,
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public nsIRequestObserver,
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public nsSupportsWeakReference,
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public nsIProgressEventSink,
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public nsIWebProgress,
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public nsIInterfaceRequestor,
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public nsIChannelEventSink,
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public nsISecurityEventSink,
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public nsISupportsPriority
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_THIS_DOCLOADER_IMPL_CID)
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nsDocLoader();
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virtual nsresult Init();
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static already_AddRefed<nsDocLoader> GetAsDocLoader(nsISupports* aSupports);
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// Needed to deal with ambiguous inheritance from nsISupports...
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static nsISupports* GetAsSupports(nsDocLoader* aDocLoader) {
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return static_cast<nsIDocumentLoader*>(aDocLoader);
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}
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// Add aDocLoader as a child to the docloader service.
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static nsresult AddDocLoaderAsChildOfRoot(nsDocLoader* aDocLoader);
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NS_DECL_ISUPPORTS
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NS_DECL_NSIDOCUMENTLOADER
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// nsIProgressEventSink
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NS_DECL_NSIPROGRESSEVENTSINK
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NS_DECL_NSISECURITYEVENTSINK
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// nsIRequestObserver methods: (for observing the load group)
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NS_DECL_NSIREQUESTOBSERVER
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NS_DECL_NSIWEBPROGRESS
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NS_DECL_NSIINTERFACEREQUESTOR
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NS_DECL_NSICHANNELEVENTSINK
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NS_DECL_NSISUPPORTSPRIORITY
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// Implementation specific methods...
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// Remove aChild from our childlist. This nulls out the child's mParent
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// pointer.
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nsresult RemoveChildLoader(nsDocLoader *aChild);
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// Add aChild to our child list. This will set aChild's mParent pointer to
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// |this|.
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nsresult AddChildLoader(nsDocLoader* aChild);
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nsDocLoader* GetParent() const { return mParent; }
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protected:
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virtual ~nsDocLoader();
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virtual nsresult SetDocLoaderParent(nsDocLoader * aLoader);
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bool IsBusy();
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void Destroy();
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virtual void DestroyChildren();
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nsIDocumentLoader* ChildAt(PRInt32 i) {
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return static_cast<nsDocLoader*>(mChildList[i]);
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}
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nsIDocumentLoader* SafeChildAt(PRInt32 i) {
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return static_cast<nsDocLoader*>(mChildList.SafeElementAt(i));
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}
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void FireOnProgressChange(nsDocLoader* aLoadInitiator,
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nsIRequest *request,
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PRInt64 aProgress,
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PRInt64 aProgressMax,
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PRInt64 aProgressDelta,
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PRInt64 aTotalProgress,
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PRInt64 aMaxTotalProgress);
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// This should be at least 2 long since we'll generally always
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// have the current page and the global docloader on the ancestor
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// list. But to deal with frames it's better to make it a bit
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// longer, and it's always a stack temporary so there's no real
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// reason not to.
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typedef nsAutoTArray<nsRefPtr<nsDocLoader>, 8> WebProgressList;
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void GatherAncestorWebProgresses(WebProgressList& aList);
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void FireOnStateChange(nsIWebProgress *aProgress,
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nsIRequest* request,
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PRInt32 aStateFlags,
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nsresult aStatus);
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// The guts of FireOnStateChange, but does not call itself on our ancestors.
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// The arguments that are const are const so that we can detect cases when
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// DoFireOnStateChange wants to propagate changes to the next web progress
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// at compile time. The ones that are not, are references so that such
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// changes can be propagated.
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void DoFireOnStateChange(nsIWebProgress * const aProgress,
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nsIRequest* const request,
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PRInt32 &aStateFlags,
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const nsresult aStatus);
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void FireOnStatusChange(nsIWebProgress *aWebProgress,
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nsIRequest *aRequest,
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nsresult aStatus,
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const PRUnichar* aMessage);
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void FireOnLocationChange(nsIWebProgress* aWebProgress,
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nsIRequest* aRequest,
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nsIURI *aUri,
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PRUint32 aFlags);
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bool RefreshAttempted(nsIWebProgress* aWebProgress,
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nsIURI *aURI,
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PRInt32 aDelay,
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bool aSameURI);
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// this function is overridden by the docshell, it is provided so that we
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// can pass more information about redirect state (the normal OnStateChange
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// doesn't get the new channel).
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// @param aRedirectFlags The flags being sent to OnStateChange that
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// indicate the type of redirect.
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// @param aStateFlags The channel flags normally sent to OnStateChange.
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virtual void OnRedirectStateChange(nsIChannel* aOldChannel,
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nsIChannel* aNewChannel,
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PRUint32 aRedirectFlags,
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PRUint32 aStateFlags) {}
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void doStartDocumentLoad();
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void doStartURLLoad(nsIRequest *request);
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void doStopURLLoad(nsIRequest *request, nsresult aStatus);
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void doStopDocumentLoad(nsIRequest *request, nsresult aStatus);
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// Inform a parent docloader that aChild is about to call its onload
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// handler.
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bool ChildEnteringOnload(nsIDocumentLoader* aChild) {
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// It's ok if we're already in the list -- we'll just be in there twice
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// and then the RemoveObject calls from ChildDoneWithOnload will remove
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// us.
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return mChildrenInOnload.AppendObject(aChild);
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}
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// Inform a parent docloader that aChild is done calling its onload
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// handler.
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void ChildDoneWithOnload(nsIDocumentLoader* aChild) {
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mChildrenInOnload.RemoveObject(aChild);
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DocLoaderIsEmpty(true);
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}
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protected:
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// IMPORTANT: The ownership implicit in the following member
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// variables has been explicitly checked and set using nsCOMPtr
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// for owning pointers and raw COM interface pointers for weak
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// (ie, non owning) references. If you add any members to this
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// class, please make the ownership explicit (pinkerton, scc).
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nsCOMPtr<nsIRequest> mDocumentRequest; // [OWNER] ???compare with document
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nsDocLoader* mParent; // [WEAK]
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nsVoidArray mListenerInfoList;
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nsCOMPtr<nsILoadGroup> mLoadGroup;
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// We hold weak refs to all our kids
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nsVoidArray mChildList;
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// The following member variables are related to the new nsIWebProgress
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// feedback interfaces that travis cooked up.
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PRInt32 mProgressStateFlags;
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PRInt64 mCurrentSelfProgress;
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PRInt64 mMaxSelfProgress;
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PRInt64 mCurrentTotalProgress;
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PRInt64 mMaxTotalProgress;
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PLDHashTable mRequestInfoHash;
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PRInt64 mCompletedTotalProgress;
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PRCList mStatusInfoList;
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/*
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* This flag indicates that the loader is loading a document. It is set
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* from the call to LoadDocument(...) until the OnConnectionsComplete(...)
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* notification is fired...
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*/
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bool mIsLoadingDocument;
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/* Flag to indicate that we're in the process of restoring a document. */
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bool mIsRestoringDocument;
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/* Flag to indicate that we're in the process of flushing layout
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under DocLoaderIsEmpty() and should not do another flush. */
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bool mDontFlushLayout;
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/* Flag to indicate whether we should consider ourselves as currently
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flushing layout for the purposes of IsBusy. For example, if Stop has
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been called then IsBusy should return false even if we are still
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flushing. */
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bool mIsFlushingLayout;
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private:
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// A list of kids that are in the middle of their onload calls and will let
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// us know once they're done. We don't want to fire onload for "normal"
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// DocLoaderIsEmpty calls (those coming from requests finishing in our
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// loadgroup) unless this is empty.
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nsCOMArray<nsIDocumentLoader> mChildrenInOnload;
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// DocLoaderIsEmpty should be called whenever the docloader may be empty.
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// This method is idempotent and does nothing if the docloader is not in
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// fact empty. This method _does_ make sure that layout is flushed if our
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// loadgroup has no active requests before checking for "real" emptiness if
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// aFlushLayout is true.
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void DocLoaderIsEmpty(bool aFlushLayout);
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nsListenerInfo *GetListenerInfo(nsIWebProgressListener* aListener);
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PRInt64 GetMaxTotalProgress();
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nsresult AddRequestInfo(nsIRequest* aRequest);
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void RemoveRequestInfo(nsIRequest* aRequest);
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nsRequestInfo *GetRequestInfo(nsIRequest* aRequest);
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void ClearRequestInfoHash();
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PRInt64 CalculateMaxProgress();
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/// void DumpChannelInfo(void);
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// used to clear our internal progress state between loads...
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void ClearInternalProgress();
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsDocLoader, NS_THIS_DOCLOADER_IMPL_CID)
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#endif /* nsDocLoader_h__ */
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