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pjs/uriloader/base/nsDocLoader.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#include "nspr.h"
#include "prlog.h"
#include "nsIDocumentLoaderObserver.h"
#include "nsDocLoader.h"
#include "nsCURILoader.h"
#include "nsNetUtil.h"
#include "nsIServiceManager.h"
#include "nsXPIDLString.h"
#include "nsIURL.h"
#include "nsCOMPtr.h"
#include "nsCom.h"
// XXX ick ick ick
#include "nsIContentViewerContainer.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsIPresContext.h"
#if defined(PR_LOGGING)
//
// Log module for nsIDocumentLoader logging...
//
// To enable logging (see prlog.h for full details):
//
// set NSPR_LOG_MODULES=DocLoader:5
// set NSPR_LOG_FILE=nspr.log
//
// this enables PR_LOG_DEBUG level information and places all output in
// the file nspr.log
//
PRLogModuleInfo* gDocLoaderLog = nsnull;
#endif /* PR_LOGGING */
#if defined(DEBUG)
void GetURIStringFromChannel(nsIRequest *aRequest, nsXPIDLCString &aStr)
{
nsCOMPtr<nsIChannel> channel;
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_OK;
channel = do_QueryInterface(aRequest, &rv);
if (NS_SUCCEEDED(rv))
rv = channel->GetURI(getter_AddRefs(uri));
if (NS_SUCCEEDED(rv) && uri)
rv = uri->GetSpec(getter_Copies(aStr));
else
aStr = "???";
}
#endif /* DEBUG */
/* Define IIDs... */
static NS_DEFINE_IID(kIDocumentIID, NS_IDOCUMENT_IID);
static NS_DEFINE_IID(kIContentViewerContainerIID, NS_ICONTENT_VIEWER_CONTAINER_IID);
struct nsChannelInfo {
nsChannelInfo(nsIChannel *key) : mKey(key),
mCurrentProgress(0),
mMaxProgress(0)
{
key->GetURI(getter_AddRefs(mURI));
}
void* mKey;
nsCOMPtr<nsIURI> mURI;
PRInt32 mCurrentProgress;
PRInt32 mMaxProgress;
};
nsDocLoaderImpl::nsDocLoaderImpl()
{
NS_INIT_REFCNT();
#if defined(PR_LOGGING)
if (nsnull == gDocLoaderLog) {
gDocLoaderLog = PR_NewLogModule("DocLoader");
}
#endif /* PR_LOGGING */
mContainer = nsnull;
mParent = nsnull;
mIsLoadingDocument = PR_FALSE;
ClearInternalProgress();
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: created.\n", this));
}
nsresult
nsDocLoaderImpl::SetDocLoaderParent(nsDocLoaderImpl *aParent)
{
mParent = aParent;
return NS_OK;
}
nsresult
nsDocLoaderImpl::Init()
{
nsresult rv;
rv = NS_NewLoadGroup(getter_AddRefs(mLoadGroup), this);
if (NS_FAILED(rv)) return rv;
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: load group %x.\n", this, mLoadGroup.get()));
rv = NS_NewISupportsArray(getter_AddRefs(mChildList));
return rv;
}
NS_IMETHODIMP nsDocLoaderImpl::ClearParentDocLoader()
{
SetDocLoaderParent(nsnull);
return NS_OK;
}
nsDocLoaderImpl::~nsDocLoaderImpl()
{
/*
|ClearWeakReferences()| here is intended to prevent people holding weak references
from re-entering this destructor since |QueryReferent()| will |AddRef()| me, and the
subsequent |Release()| will try to destroy me. At this point there should be only
weak references remaining (otherwise, we wouldn't be getting destroyed).
An alternative would be incrementing our refcount (consider it a compressed flag
saying "Don't re-destroy."). I haven't yet decided which is better. [scc]
*/
ClearWeakReferences();
Destroy();
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: deleted.\n", this));
PRUint32 count=0;
mChildList->Count(&count);
// if the doc loader still has children...we need to enumerate the children and make
// them null out their back ptr to the parent doc loader
if (count > 0)
{
for (PRUint32 i=0; i<count; i++)
{
nsCOMPtr<nsIDocumentLoader> loader;
loader = getter_AddRefs(NS_STATIC_CAST(nsIDocumentLoader*, mChildList->ElementAt(i)));
if (loader)
loader->ClearParentDocLoader();
}
mChildList->Clear();
}
}
/*
* Implementation of ISupports methods...
*/
NS_IMPL_THREADSAFE_ADDREF(nsDocLoaderImpl)
NS_IMPL_THREADSAFE_RELEASE(nsDocLoaderImpl)
NS_INTERFACE_MAP_BEGIN(nsDocLoaderImpl)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStreamObserver)
NS_INTERFACE_MAP_ENTRY(nsIStreamObserver)
NS_INTERFACE_MAP_ENTRY(nsIDocumentLoader)
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
NS_INTERFACE_MAP_ENTRY(nsIWebProgress)
NS_INTERFACE_MAP_ENTRY(nsIProgressEventSink)
NS_INTERFACE_MAP_ENTRY(nsIInterfaceRequestor)
NS_INTERFACE_MAP_END
/*
* Implementation of nsIInterfaceRequestor methods...
*/
NS_IMETHODIMP nsDocLoaderImpl::GetInterface(const nsIID& aIID, void** aSink)
{
nsresult rv = NS_ERROR_NO_INTERFACE;
NS_ENSURE_ARG_POINTER(aSink);
if(aIID.Equals(NS_GET_IID(nsILoadGroup))) {
*aSink = mLoadGroup;
NS_IF_ADDREF((nsISupports*)*aSink);
rv = NS_OK;
} else {
rv = QueryInterface(aIID, aSink);
}
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::CreateDocumentLoader(nsIDocumentLoader** anInstance)
{
nsresult rv = NS_OK;
nsDocLoaderImpl * newLoader = new nsDocLoaderImpl();
NS_ENSURE_TRUE(newLoader, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(newLoader);
newLoader->Init();
// Initialize now that we have a reference
rv = newLoader->SetDocLoaderParent(this);
if (NS_SUCCEEDED(rv)) {
//
// XXX this method incorrectly returns a bool
//
rv = mChildList->AppendElement((nsIDocumentLoader*)newLoader)
? NS_OK : NS_ERROR_FAILURE;
}
rv = newLoader->QueryInterface(NS_GET_IID(nsIDocumentLoader), (void **) anInstance);
NS_RELEASE(newLoader);
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::Stop(void)
{
nsresult rv = NS_OK;
PRUint32 count, i;
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: Stop() called\n", this));
rv = mChildList->Count(&count);
if (NS_FAILED(rv)) return rv;
for (i=0; i<count; i++) {
nsIDocumentLoader* loader;
loader = NS_STATIC_CAST(nsIDocumentLoader*, mChildList->ElementAt(i));
if (loader) {
(void) loader->Stop();
NS_RELEASE(loader);
}
}
rv = mLoadGroup->Cancel(NS_BINDING_ABORTED);
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::IsBusy(PRBool * aResult)
{
nsresult rv;
//
// A document loader is busy if either:
//
// 1. It is currently loading a document (ie. one or more URIs)
// 2. One of it's child document loaders is busy...
//
*aResult = PR_FALSE;
/* Is this document loader busy? */
if (mIsLoadingDocument) {
rv = mLoadGroup->IsPending(aResult);
if (NS_FAILED(rv)) return rv;
}
/* Otherwise, check its child document loaders... */
if (!*aResult) {
PRUint32 count, i;
rv = mChildList->Count(&count);
if (NS_FAILED(rv)) return rv;
for (i=0; i<count; i++) {
nsIDocumentLoader* loader;
loader = NS_STATIC_CAST(nsIDocumentLoader*, mChildList->ElementAt(i));
if (loader) {
(void) loader->IsBusy(aResult);
NS_RELEASE(loader);
if (*aResult) break;
}
}
}
return NS_OK;
}
/*
* Do not hold refs to the objects in the observer lists. Observers
* are expected to remove themselves upon their destruction if they
* have not removed themselves previously
*/
NS_IMETHODIMP
nsDocLoaderImpl::AddObserver(nsIDocumentLoaderObserver* aObserver)
{
nsresult rv;
if (mDocObservers.IndexOf(aObserver) == -1) {
//
// XXX this method incorrectly returns a bool
//
rv = mDocObservers.AppendElement(aObserver) ? NS_OK : NS_ERROR_FAILURE;
} else {
// The observer is already in the list...
rv = NS_ERROR_FAILURE;
}
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::RemoveObserver(nsIDocumentLoaderObserver* aObserver)
{
if (PR_TRUE == mDocObservers.RemoveElement(aObserver)) {
return NS_OK;
}
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsDocLoaderImpl::SetContainer(nsISupports* aContainer)
{
// This is a weak reference...
mContainer = aContainer;
return NS_OK;
}
NS_IMETHODIMP
nsDocLoaderImpl::GetContainer(nsISupports** aResult)
{
NS_ENSURE_ARG_POINTER(aResult);
*aResult = mContainer;
NS_IF_ADDREF(*aResult);
return NS_OK;
}
NS_IMETHODIMP
nsDocLoaderImpl::GetLoadGroup(nsILoadGroup** aResult)
{
nsresult rv = NS_OK;
if (nsnull == aResult) {
rv = NS_ERROR_NULL_POINTER;
} else {
*aResult = mLoadGroup;
NS_IF_ADDREF(*aResult);
}
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::GetContentViewerContainer(nsISupports* aDocumentID,
nsIContentViewerContainer** aResult)
{
nsISupports* base = aDocumentID;
nsIDocument* doc;
nsresult rv;
rv = base->QueryInterface(kIDocumentIID, (void**)&doc);
if (NS_SUCCEEDED(rv)) {
nsIPresShell* pres;
pres = doc->GetShellAt(0);
if (nsnull != pres) {
nsIPresContext* presContext;
rv = pres->GetPresContext(&presContext);
if (NS_SUCCEEDED(rv) && nsnull != presContext) {
nsISupports* supp;
rv = presContext->GetContainer(&supp);
if (NS_SUCCEEDED(rv) && nsnull != supp) {
rv = supp->QueryInterface(kIContentViewerContainerIID, (void**)aResult);
NS_RELEASE(supp);
}
NS_RELEASE(presContext);
}
NS_RELEASE(pres);
}
NS_RELEASE(doc);
}
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::Destroy()
{
Stop();
// Remove the document loader from the parent list of loaders...
if (mParent)
{
mParent->RemoveChildGroup(this);
mParent = nsnull;
}
ClearChannelInfoList();
mDocumentChannel = null_nsCOMPtr();
mLoadGroup->SetGroupObserver(nsnull);
return NS_OK;
}
NS_IMETHODIMP
nsDocLoaderImpl::OnStartRequest(nsIChannel *aChannel, nsISupports *aCtxt)
{
// called each time a channel is added to the group.
nsresult rv;
if (!mIsLoadingDocument) {
PRUint32 loadAttribs = 0;
aChannel->GetLoadAttributes(&loadAttribs);
if (loadAttribs & nsIChannel::LOAD_DOCUMENT_URI) {
mIsLoadingDocument = PR_TRUE;
ClearInternalProgress(); // only clear our progress if we are starting a new load....
}
}
//
// Only fire an OnStartDocumentLoad(...) if the document loader
// has initiated a load... Otherwise, this notification has
// resulted from a channel being added to the load group.
//
if (mIsLoadingDocument) {
PRUint32 count;
rv = mLoadGroup->GetActiveCount(&count);
if (NS_FAILED(rv)) return rv;
//
// Create a new ChannelInfo for the channel that is starting to
// load...
//
AddChannelInfo(aChannel);
if (1 == count) {
// This channel is associated with the entire document...
mDocumentChannel = aChannel;
mLoadGroup->SetDefaultLoadChannel(mDocumentChannel);
// Update the progress status state
mProgressStateFlags = nsIWebProgressListener::flag_start;
doStartDocumentLoad();
FireOnStartDocumentLoad(this, aChannel);
}
else {
doStartURLLoad(aChannel);
FireOnStartURLLoad(this, aChannel);
}
}
else {
ClearChannelInfoList();
doStartURLLoad(aChannel);
FireOnStartURLLoad(this, aChannel);
}
return NS_OK;
}
NS_IMETHODIMP
nsDocLoaderImpl::OnStopRequest(nsIChannel *aChannel,
nsISupports *aCtxt,
nsresult aStatus,
const PRUnichar *aMsg)
{
nsresult rv = NS_OK;
//
// Only fire the OnEndDocumentLoad(...) if the document loader
// has initiated a load...
//
if (mIsLoadingDocument) {
PRUint32 count;
//
// Set the Maximum progress to the same value as the current progress.
// Since the URI has finished loading, all the data is there. Also,
// this will allow a more accurate estimation of the max progress (in case
// the old value was unknown ie. -1)
//
nsChannelInfo *info;
info = GetChannelInfo(aChannel);
if (info) {
PRInt32 oldMax = info->mMaxProgress;
info->mMaxProgress = info->mCurrentProgress;
//
// If a channel whose content-length was previously unknown has just
// finished loading, then use this new data to try to calculate a
// mMaxSelfProgress...
//
if ((oldMax < 0) && (mMaxSelfProgress < 0)) {
CalculateMaxProgress(&mMaxSelfProgress);
}
}
rv = mLoadGroup->GetActiveCount(&count);
if (NS_FAILED(rv)) return rv;
//
// The load group for this DocumentLoader is idle...
//
if (0 == count)
DocLoaderIsEmpty(aStatus);
else {
doStopURLLoad(aChannel, aStatus);
FireOnEndURLLoad(this, aChannel, aStatus);
}
}
else {
doStopURLLoad(aChannel, aStatus);
FireOnEndURLLoad(this, aChannel, aStatus);
}
return NS_OK;
}
nsresult nsDocLoaderImpl::RemoveChildGroup(nsDocLoaderImpl* aLoader)
{
nsresult rv = NS_OK;
if (NS_SUCCEEDED(rv)) {
mChildList->RemoveElement((nsIDocumentLoader*)aLoader);
}
return rv;
}
void nsDocLoaderImpl::DocLoaderIsEmpty(nsresult aStatus)
{
#if 0
if (mParent) {
mParent->DocLoaderIsEmpty(aStatus);
//
// New code to break the circular reference between
// the load group and the docloader...
//
mLoadGroup->SetDefaultLoadChannel(nsnull);
}
#endif /* 0 */
if (mIsLoadingDocument) {
PRBool busy = PR_FALSE;
/* In the unimagineably rude circumstance that onload event handlers
triggered by this function actually kill the window ... ok, it's
not unimagineable; it's happened ... this deathgrip keeps this object
alive long enough to survive this function call. */
nsCOMPtr<nsIDocumentLoader> kungFuDeathGrip(this);
IsBusy(&busy);
if (!busy) {
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: Is now idle...\n", this));
nsCOMPtr<nsIChannel> docChannel(mDocumentChannel);
mDocumentChannel = null_nsCOMPtr();
mIsLoadingDocument = PR_FALSE;
// Update the progress status state - the document is done
mProgressStateFlags = nsIWebProgressListener::flag_stop;
//
// New code to break the circular reference between
// the load group and the docloader...
//
mLoadGroup->SetDefaultLoadChannel(nsnull);
//
// Do nothing after firing the OnEndDocumentLoad(...). The document
// loader may be loading a *new* document - if LoadDocument()
// was called from a handler!
//
doStopDocumentLoad(docChannel, aStatus);
FireOnEndDocumentLoad(this, docChannel, aStatus);
if (mParent) {
mParent->DocLoaderIsEmpty(aStatus);
}
}
}
}
void nsDocLoaderImpl::doStartDocumentLoad(void)
{
#if defined(DEBUG)
nsXPIDLCString buffer;
GetURIStringFromChannel(mDocumentChannel, buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: ++ Firing OnStateChange for start document load (...)."
"\tURI: %s \n",
this, (const char *) buffer));
#endif /* DEBUG */
// Fire an OnStatus(...) notification flag_net_start. This indicates
// that the document represented by mDocumentChannel has started to
// load...
FireOnStateChange(this,
mDocumentChannel,
nsIWebProgressListener::flag_start |
nsIWebProgressListener::flag_is_document |
nsIWebProgressListener::flag_is_request |
nsIWebProgressListener::flag_is_network,
NS_OK);
}
void nsDocLoaderImpl::doStartURLLoad(nsIChannel *aChannel)
{
#if defined(DEBUG)
nsXPIDLCString buffer;
GetURIStringFromChannel(aChannel, buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: ++ Firing OnStateChange start url load (...)."
"\tURI: %s\n",
this, (const char *) buffer));
#endif /* DEBUG */
FireOnStateChange(this,
aChannel,
nsIWebProgressListener::flag_start |
nsIWebProgressListener::flag_is_request,
NS_OK);
}
void nsDocLoaderImpl::doStopURLLoad(nsIChannel *aChannel, nsresult aStatus)
{
#if defined(DEBUG)
nsXPIDLCString buffer;
GetURIStringFromChannel(aChannel, buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: ++ Firing OnStateChange for end url load (...)."
"\tURI: %s status=%x\n",
this, (const char *) buffer, aStatus));
#endif /* DEBUG */
FireOnStateChange(this,
aChannel,
nsIWebProgressListener::flag_stop |
nsIWebProgressListener::flag_is_request,
aStatus);
}
void nsDocLoaderImpl::doStopDocumentLoad(nsIChannel* aChannel,
nsresult aStatus)
{
#if defined(DEBUG)
nsXPIDLCString buffer;
GetURIStringFromChannel(aChannel, buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: ++ Firing OnStateChange for end document load (...)."
"\tURI: %s Status=%x\n",
this, (const char *) buffer, aStatus));
#endif /* DEBUG */
//
// Fire an OnStatusChange(...) notification indicating the the
// current document has finished loading...
//
FireOnStateChange(this,
aChannel,
nsIWebProgressListener::flag_stop |
nsIWebProgressListener::flag_is_document |
nsIWebProgressListener::flag_is_request |
nsIWebProgressListener::flag_is_network,
aStatus);
}
void nsDocLoaderImpl::FireOnStartDocumentLoad(nsDocLoaderImpl* aLoadInitiator,
nsIChannel *aDocChannel)
{
PRInt32 count;
nsCOMPtr<nsIURI> uri;
aDocChannel->GetURI(getter_AddRefs(uri));
#if defined(DEBUG)
nsXPIDLCString buffer;
GetURIStringFromChannel(aDocChannel, buffer);
if (aLoadInitiator == this) {
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: ++ Firing OnStartDocumentLoad(...).\tURI: %s\n",
this, (const char *) buffer));
} else {
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: -- Propagating OnStartDocumentLoad(...)."
"DocLoader:%p URI:%s\n",
this, aLoadInitiator, (const char *) buffer));
}
#endif /* DEBUG */
/*
* First notify any observers that the document load has begun...
*
* Operate the elements from back to front so that if items get
* get removed from the list it won't affect our iteration
*/
count = mDocObservers.Count();
while (count > 0) {
nsIDocumentLoaderObserver *observer;
observer = NS_STATIC_CAST(nsIDocumentLoaderObserver*, mDocObservers.ElementAt(--count));
NS_ASSERTION(observer, "NULL observer found in list.");
if (! observer) {
continue;
}
observer->OnStartDocumentLoad(aLoadInitiator, uri, mCommand);
}
/*
* Finally notify the parent...
*/
if (mParent) {
mParent->FireOnStartDocumentLoad(aLoadInitiator, aDocChannel);
}
}
void nsDocLoaderImpl::FireOnEndDocumentLoad(nsDocLoaderImpl* aLoadInitiator,
nsIChannel *aDocChannel,
nsresult aStatus)
{
#if defined(DEBUG)
nsXPIDLCString buffer;
GetURIStringFromChannel(aDocChannel, buffer);
if (aLoadInitiator == this) {
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: ++ Firing OnEndDocumentLoad(...)"
"\tURI: %s Status: %x\n",
this, (const char *) buffer, aStatus));
} else {
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: -- Propagating OnEndDocumentLoad(...)."
"DocLoader:%p URI:%s\n",
this, aLoadInitiator, (const char *)buffer));
}
#endif /* DEBUG */
/*
* First notify any observers that the document load has finished...
*
* Operate the elements from back to front so that if items get
* get removed from the list it won't affect our iteration
*/
PRInt32 count;
count = mDocObservers.Count();
while (count > 0) {
nsIDocumentLoaderObserver *observer;
observer = NS_STATIC_CAST(nsIDocumentLoaderObserver*, mDocObservers.ElementAt(--count));
NS_ASSERTION(observer, "NULL observer found in list.");
if (! observer) {
continue;
}
observer->OnEndDocumentLoad(aLoadInitiator, aDocChannel, aStatus);
}
/*
* Next notify the parent...
*/
if (mParent) {
mParent->FireOnEndDocumentLoad(aLoadInitiator, aDocChannel, aStatus);
}
}
void nsDocLoaderImpl::FireOnStartURLLoad(nsDocLoaderImpl* aLoadInitiator,
nsIChannel* aChannel)
{
#if defined(DEBUG)
nsXPIDLCString buffer;
GetURIStringFromChannel(aChannel, buffer);
if (aLoadInitiator == this) {
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: ++ Firing OnStartURLLoad(...)"
"\tURI: %s\n",
this, (const char *) buffer));
} else {
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: -- Propagating OnStartURLLoad(...)."
"DocLoader:%p URI:%s\n",
this, aLoadInitiator, (const char *) buffer));
}
#endif /* DEBUG */
PRInt32 count;
/*
* First notify any observers that the URL load has begun...
*
* Operate the elements from back to front so that if items get
* get removed from the list it won't affect our iteration
*/
count = mDocObservers.Count();
while (count > 0) {
nsIDocumentLoaderObserver *observer;
observer = NS_STATIC_CAST(nsIDocumentLoaderObserver*, mDocObservers.ElementAt(--count));
NS_ASSERTION(observer, "NULL observer found in list.");
if (! observer) {
continue;
}
observer->OnStartURLLoad(aLoadInitiator, aChannel);
}
/*
* Finally notify the parent...
*/
if (mParent) {
mParent->FireOnStartURLLoad(aLoadInitiator, aChannel);
}
}
void nsDocLoaderImpl::FireOnEndURLLoad(nsDocLoaderImpl* aLoadInitiator,
nsIChannel* aChannel, nsresult aStatus)
{
#if defined(DEBUG)
nsXPIDLCString buffer;
GetURIStringFromChannel(aChannel, buffer);
if (aLoadInitiator == this) {
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: ++ Firing OnEndURLLoad(...)"
"\tURI: %s Status: %x\n",
this, (const char *) buffer, aStatus));
} else {
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: -- Propagating OnEndURLLoad(...)."
"DocLoader:%p URI:%s\n",
this, aLoadInitiator, (const char *) buffer));
}
#endif /* DEBUG */
PRInt32 count;
/*
* First notify any observers that the URL load has completed...
*
* Operate the elements from back to front so that if items get
* get removed from the list it won't affect our iteration
*/
count = mDocObservers.Count();
while (count > 0) {
nsIDocumentLoaderObserver *observer;
observer = NS_STATIC_CAST(nsIDocumentLoaderObserver*, mDocObservers.ElementAt(--count));
NS_ASSERTION(observer, "NULL observer found in list.");
if (! observer) {
continue;
}
observer->OnEndURLLoad(aLoadInitiator, aChannel, aStatus);
}
/*
* Finally notify the parent...
*/
if (mParent) {
mParent->FireOnEndURLLoad(aLoadInitiator, aChannel, aStatus);
}
}
////////////////////////////////////////////////////////////////////////////////////
// The following section contains support for nsIWebProgress and related stuff
////////////////////////////////////////////////////////////////////////////////////
// get web progress returns our web progress listener or if
// we don't have one, it will look up the doc loader hierarchy
// to see if one of our parent doc loaders has one.
nsresult nsDocLoaderImpl::GetParentWebProgressListener(nsDocLoaderImpl * aDocLoader, nsIWebProgressListener ** aWebProgress)
{
// if we got here, there is no web progress to return
*aWebProgress = nsnull;
return NS_OK;
}
NS_IMETHODIMP
nsDocLoaderImpl::AddProgressListener(nsIWebProgressListener *aListener)
{
nsresult rv;
if (mListenerList.IndexOf(aListener) == -1) {
// XXX this method incorrectly returns a bool
rv = mListenerList.AppendElement(aListener) ? NS_OK : NS_ERROR_FAILURE;
} else {
// The listener is already in the list...
rv = NS_ERROR_FAILURE;
}
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::RemoveProgressListener(nsIWebProgressListener *aListener)
{
nsresult rv;
// XXX this method incorrectly returns a bool
rv = mListenerList.RemoveElement(aListener) ? NS_OK : NS_ERROR_FAILURE;
return rv;
}
NS_IMETHODIMP nsDocLoaderImpl::GetProgressStatusFlags(PRInt32 *aProgressStateFlags)
{
*aProgressStateFlags = mProgressStateFlags;
return NS_OK;
}
NS_IMETHODIMP nsDocLoaderImpl::GetCurSelfProgress(PRInt32 *aCurSelfProgress)
{
*aCurSelfProgress = mCurrentSelfProgress;
return NS_OK;
}
NS_IMETHODIMP nsDocLoaderImpl::GetMaxSelfProgress(PRInt32 *aMaxSelfProgress)
{
*aMaxSelfProgress = mMaxSelfProgress;
return NS_OK;
}
NS_IMETHODIMP nsDocLoaderImpl::GetCurTotalProgress(PRInt32 *aCurTotalProgress)
{
*aCurTotalProgress = mCurrentTotalProgress;
return NS_OK;
}
NS_IMETHODIMP nsDocLoaderImpl::GetMaxTotalProgress(PRInt32 *aMaxTotalProgress)
{
PRUint32 count = 0;
nsresult rv = NS_OK;
PRInt32 invididualProgress, newMaxTotal;
newMaxTotal = 0;
rv = mChildList->Count(&count);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIWebProgress> webProgress;
nsCOMPtr<nsISupports> docloader;
for (PRUint32 i=0; i<count; i++)
{
invididualProgress = 0;
docloader = getter_AddRefs(mChildList->ElementAt(i));
if (docloader)
{
webProgress = do_QueryInterface(docloader);
webProgress->GetMaxTotalProgress(&invididualProgress);
}
if (invididualProgress < 0) // if one of the elements doesn't know it's size
// then none of them do
{
newMaxTotal = -1;
break;
}
else
newMaxTotal += invididualProgress;
}
if (mMaxSelfProgress >= 0 && newMaxTotal >= 0) {
*aMaxTotalProgress = newMaxTotal + mMaxSelfProgress;
} else {
*aMaxTotalProgress = -1;
}
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////////
// The following section contains support for nsIEventProgressSink which is used to
// pass progress and status between the actual channel and the doc loader. The doc loader
// then turns around and makes the right web progress calls based on this information.
////////////////////////////////////////////////////////////////////////////////////
NS_IMETHODIMP nsDocLoaderImpl::OnProgress(nsIChannel* aChannel, nsISupports* ctxt,
PRUint32 aProgress, PRUint32 aProgressMax)
{
nsChannelInfo *info;
PRInt32 progressDelta = 0;
//
// Update the ChannelInfo entry with the new progress data
//
info = GetChannelInfo(aChannel);
if (info) {
if ((0 == info->mCurrentProgress) && (0 == info->mMaxProgress)) {
//
// This is the first progress notification for the entry. If
// (aMaxProgress > 0) then the content-length of the data is known,
// so update mMaxSelfProgress... Otherwise, set it to -1 to indicate
// that the content-length is no longer known.
//
if (aProgressMax != (PRUint32)-1) {
mMaxSelfProgress += aProgressMax;
info->mMaxProgress = aProgressMax;
} else {
mMaxSelfProgress = -1;
info->mMaxProgress = -1;
}
// Send a flag_transferring notification for the request.
PRInt32 flags;
flags = nsIWebProgressListener::flag_transferring |
nsIWebProgressListener::flag_is_request;
//
// Move the WebProgress into the flag_transferring state if necessary...
//
if (mProgressStateFlags & nsIWebProgressListener::flag_start) {
mProgressStateFlags = nsIWebProgressListener::flag_transferring;
// Send flag_transferring for the document too...
flags |= nsIWebProgressListener::flag_is_document;
}
FireOnStateChange(this, aChannel, flags, NS_OK);
}
// Update the current progress count...
progressDelta = aProgress - info->mCurrentProgress;
mCurrentSelfProgress += progressDelta;
info->mCurrentProgress = aProgress;
}
//
// The channel is not part of the load group, so ignore its progress
// information...
//
else {
#if defined(DEBUG)
nsXPIDLCString buffer;
GetURIStringFromChannel(aChannel, buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p OOPS - No Channel Info for: %s\n",
this, (const char *)buffer));
#endif /* DEBUG */
return NS_OK;
}
//
// Fire progress notifications out to any registered nsIWebProgressListeners
//
FireOnProgressChange(this, aChannel, aProgress, aProgressMax, progressDelta,
mCurrentTotalProgress, mMaxTotalProgress);
return NS_OK;
}
NS_IMETHODIMP nsDocLoaderImpl::OnStatus(nsIChannel* channel, nsISupports* ctxt, const PRUnichar* aMsg)
{
return NS_OK;
}
void nsDocLoaderImpl::ClearInternalProgress()
{
ClearChannelInfoList();
mCurrentSelfProgress = mMaxSelfProgress = 0;
mCurrentTotalProgress = mMaxTotalProgress = 0;
mProgressStateFlags = nsIWebProgressListener::flag_stop;
}
void nsDocLoaderImpl::FireOnProgressChange(nsDocLoaderImpl *aLoadInitiator,
nsIChannel *aChannel,
PRInt32 aProgress,
PRInt32 aProgressMax,
PRInt32 aProgressDelta,
PRInt32 aTotalProgress,
PRInt32 aMaxTotalProgress)
{
PRInt32 count;
if (mIsLoadingDocument) {
mCurrentTotalProgress += aProgressDelta;
GetMaxTotalProgress(&mMaxTotalProgress);
aTotalProgress = mCurrentTotalProgress;
aMaxTotalProgress = mMaxTotalProgress;
}
#if defined(DEBUG)
nsXPIDLCString buffer;
GetURIStringFromChannel(aChannel, buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: Progress (%s): curSelf: %d maxSelf: %d curTotal: %d maxTotal %d\n",
this, (const char *)buffer, aProgress, aProgressMax, aTotalProgress, aMaxTotalProgress));
#endif /* DEBUG */
/*
* First notify any listeners of the new progress info...
*
* Operate the elements from back to front so that if items get
* get removed from the list it won't affect our iteration
*/
count = mListenerList.Count();
while (count > 0) {
nsIWebProgressListener *listener;
listener = NS_STATIC_CAST(nsIWebProgressListener*,
mListenerList.ElementAt(--count));
NS_ASSERTION(listener, "NULL listener found in list.");
if (! listener) {
continue;
}
listener->OnProgressChange(aLoadInitiator,aChannel,
aProgress, aProgressMax,
aTotalProgress, aMaxTotalProgress);
}
// Pass the notification up to the parent...
if (mParent) {
mParent->FireOnProgressChange(aLoadInitiator, aChannel,
aProgress, aProgressMax,
aProgressDelta,
aTotalProgress, aMaxTotalProgress);
}
}
void nsDocLoaderImpl::FireOnStateChange(nsIWebProgress *aProgress,
nsIRequest *aRequest,
PRInt32 aStateFlags,
nsresult aStatus)
{
PRInt32 count;
//
// Remove the flag_is_network bit if necessary.
//
// The rule is to remove this bit, if the notification has been passed
// up from a child WebProgress, and the current WebProgress is already
// active...
//
if (mIsLoadingDocument &&
(aStateFlags & nsIWebProgressListener::flag_is_network) &&
(this != aProgress)) {
aStateFlags &= ~nsIWebProgressListener::flag_is_network;
}
#if defined(DEBUG)
nsXPIDLCString buffer;
GetURIStringFromChannel(aRequest, buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: Status (%s): code: %x\n",
this, (const char *)buffer, aStateFlags));
#endif /* DEBUG */
/*
* First notify any listeners of the new state info...
*
* Operate the elements from back to front so that if items get
* get removed from the list it won't affect our iteration
*/
count = mListenerList.Count();
while (count > 0) {
nsIWebProgressListener *listener;
listener = NS_STATIC_CAST(nsIWebProgressListener*,
mListenerList.ElementAt(--count));
NS_ASSERTION(listener, "NULL listener found in list.");
if (! listener) {
continue;
}
listener->OnStateChange(aProgress, aRequest, aStateFlags, aStatus);
}
// Pass the notification up to the parent...
if (mParent) {
mParent->FireOnStateChange(aProgress, aRequest, aStateFlags, aStatus);
}
}
NS_IMETHODIMP
nsDocLoaderImpl::FireOnLocationChange(nsIURI *aUri)
{
PRInt32 count;
count = mListenerList.Count();
while (count > 0) {
nsIWebProgressListener *listener;
listener = NS_STATIC_CAST(nsIWebProgressListener*,
mListenerList.ElementAt(--count));
NS_ASSERTION(listener, "NULL listener found in list.");
if (! listener) {
continue;
}
listener->OnLocationChange(aUri);
}
return NS_OK;
}
nsresult nsDocLoaderImpl::AddChannelInfo(nsIChannel *aChannel)
{
nsresult rv;
PRUint32 loadAttribs=nsIChannel::LOAD_NORMAL;
//
// Only create a ChannelInfo entry if the channel is *not* being loaded
// in the background...
//
rv = aChannel->GetLoadAttributes(&loadAttribs);
if (!(nsIChannel::LOAD_BACKGROUND & loadAttribs)) {
nsChannelInfo *info;
info = new nsChannelInfo(aChannel);
if (info) {
// XXX this method incorrectly returns a bool
rv = mChannelInfoList.AppendElement(info) ? NS_OK : NS_ERROR_FAILURE;
} else {
rv = NS_ERROR_OUT_OF_MEMORY;
}
}
else {
rv = NS_OK;
}
return rv;
}
nsChannelInfo * nsDocLoaderImpl::GetChannelInfo(nsIChannel *aChannel)
{
nsChannelInfo *info;
PRInt32 i, count;
count = mChannelInfoList.Count();
for(i=0; i<count; i++) {
info = (nsChannelInfo *)mChannelInfoList.ElementAt(i);
if (aChannel == info->mKey) {
return info;
}
}
return nsnull;
}
nsresult nsDocLoaderImpl::ClearChannelInfoList(void)
{
nsChannelInfo *info;
PRInt32 i, count;
count = mChannelInfoList.Count();
for(i=0; i<count; i++) {
info = (nsChannelInfo *)mChannelInfoList.ElementAt(i);
delete info;
}
mChannelInfoList.Clear();
mChannelInfoList.Compact();
return NS_OK;
}
void nsDocLoaderImpl::CalculateMaxProgress(PRInt32 *aMax)
{
PRInt32 i, count;
PRInt32 current=0, max=0;
count = mChannelInfoList.Count();
for(i=0; i<count; i++) {
nsChannelInfo *info;
info = (nsChannelInfo *)mChannelInfoList.ElementAt(i);
current += info->mCurrentProgress;
if (max >= 0) {
if (info->mMaxProgress < info->mCurrentProgress) {
max = -1;
} else {
max += info->mMaxProgress;
}
}
}
*aMax = max;
}
#if 0
void nsDocLoaderImpl::DumpChannelInfo()
{
nsChannelInfo *info;
PRInt32 i, count;
PRInt32 current=0, max=0;
printf("==== DocLoader=%x\n", this);
count = mChannelInfoList.Count();
for(i=0; i<count; i++) {
info = (nsChannelInfo *)mChannelInfoList.ElementAt(i);
#if defined(DEBUG)
nsXPIDLCString buffer;
nsresult rv = NS_OK;
if (info->mURI) {
rv = info->mURI->GetSpec(getter_Copies(buffer));
}
printf(" [%d] current=%d max=%d [%s]\n", i,
info->mCurrentProgress,
info->mMaxProgress, (const char *)buffer);
#endif /* DEBUG */
current += info->mCurrentProgress;
if (max >= 0) {
if (info->mMaxProgress < info->mCurrentProgress) {
max = -1;
} else {
max += info->mMaxProgress;
}
}
}
printf("\nCurrent=%d Total=%d\n====\n", current, max);
}
#endif /* 0 */
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