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gecko-dev/uriloader/base/nsDocLoader.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* 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 the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nspr.h"
#include "prlog.h"
#include "nsDocLoader.h"
#include "nsCURILoader.h"
#include "nsNetUtil.h"
#include "nsIHttpChannel.h"
#include "nsIServiceManager.h"
#include "nsXPIDLString.h"
#include "nsIURL.h"
#include "nsCOMPtr.h"
#include "nscore.h"
#include "nsWeakPtr.h"
#include "nsIDOMWindow.h"
// XXX ick ick ick
#include "nsIContentViewerContainer.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsIPresContext.h"
#include "nsIStringBundle.h"
#include "nsIScriptSecurityManager.h"
static NS_DEFINE_CID(kStringBundleServiceCID, NS_STRINGBUNDLESERVICE_CID);
#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 GetURIStringFromRequest(nsIRequest* request, nsACString &name)
{
if (request)
request->GetName(name);
else
name = NS_LITERAL_CSTRING("???");
}
#endif /* DEBUG */
/* Define IIDs... */
static NS_DEFINE_IID(kIDocumentIID, NS_IDOCUMENT_IID);
static NS_DEFINE_IID(kIContentViewerContainerIID, NS_ICONTENTVIEWERCONTAINER_IID);
struct nsRequestInfo : public PLDHashEntryHdr
{
nsRequestInfo(const void *key)
: mKey(key), mCurrentProgress(0), mMaxProgress(0)
{
}
const void* mKey; // Must be first for the pldhash stubs to work
PRInt32 mCurrentProgress;
PRInt32 mMaxProgress;
};
PR_STATIC_CALLBACK(PRBool)
RequestInfoHashInitEntry(PLDHashTable *table, PLDHashEntryHdr *entry,
const void *key)
{
// Initialize the entry with placement new
new (entry) nsRequestInfo(key);
return PR_TRUE;
}
struct nsListenerInfo {
nsListenerInfo(nsIWeakReference *aListener, unsigned long aNotifyMask)
: mWeakListener(aListener),
mNotifyMask(aNotifyMask)
{
}
// Weak pointer for the nsIWebProgressListener...
nsWeakPtr mWeakListener;
// Mask indicating which notifications the listener wants to receive.
unsigned long mNotifyMask;
};
nsDocLoaderImpl::nsDocLoaderImpl()
: mListenerInfoList(8)
{
#if defined(PR_LOGGING)
if (nsnull == gDocLoaderLog) {
gDocLoaderLog = PR_NewLogModule("DocLoader");
}
#endif /* PR_LOGGING */
mContainer = nsnull;
mParent = nsnull;
mIsLoadingDocument = PR_FALSE;
static PLDHashTableOps hash_table_ops =
{
PL_DHashAllocTable,
PL_DHashFreeTable,
PL_DHashGetKeyStub,
PL_DHashVoidPtrKeyStub,
PL_DHashMatchEntryStub,
PL_DHashMoveEntryStub,
PL_DHashClearEntryStub,
PL_DHashFinalizeStub,
RequestInfoHashInitEntry
};
if (!PL_DHashTableInit(&mRequestInfoHash, &hash_table_ops, nsnull,
sizeof(nsRequestInfo), 16)) {
mRequestInfoHash.ops = nsnull;
}
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()
{
if (!mRequestInfoHash.ops) {
return NS_ERROR_OUT_OF_MEMORY;
}
nsresult 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()));
return NS_OK;
}
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));
PRInt32 count = mChildList.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 (PRInt32 i=0; i < count; i++)
{
nsCOMPtr<nsIDocumentLoader> loader = mChildList.ObjectAt(i);
if (loader)
loader->ClearParentDocLoader();
}
mChildList.Clear();
}
if (mRequestInfoHash.ops) {
PL_DHashTableFinish(&mRequestInfoHash);
}
}
/*
* 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, nsIRequestObserver)
NS_INTERFACE_MAP_ENTRY(nsIRequestObserver)
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_ENTRY(nsIHttpEventSink)
NS_INTERFACE_MAP_ENTRY(nsISecurityEventSink)
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;
*anInstance = nsnull;
nsDocLoaderImpl * newLoader = new nsDocLoaderImpl();
NS_ENSURE_TRUE(newLoader, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(newLoader);
// Initialize now that we have a reference
rv = newLoader->Init();
if (NS_SUCCEEDED(rv)) {
rv = newLoader->SetDocLoaderParent(this);
}
if (NS_SUCCEEDED(rv)) {
rv = mChildList.AppendObject((nsIDocumentLoader*)newLoader)
? NS_OK : NS_ERROR_FAILURE;
}
if (NS_SUCCEEDED(rv)) {
rv = CallQueryInterface(newLoader, anInstance);
}
NS_RELEASE(newLoader);
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::Stop(void)
{
nsresult rv = NS_OK;
PRInt32 count, i;
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: Stop() called\n", this));
count = mChildList.Count();
nsCOMPtr<nsIDocumentLoader> loader;
for (i=0; i < count; i++) {
loader = mChildList.ObjectAt(i);
if (loader) {
(void) loader->Stop();
}
}
if (mLoadGroup)
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) {
PRInt32 count, i;
count = mChildList.Count();
nsCOMPtr<nsIDocumentLoader> loader;
for (i=0; i < count; i++) {
loader = mChildList.ObjectAt(i);
if (loader) {
(void) loader->IsBusy(aResult);
if (*aResult) break;
}
}
}
return NS_OK;
}
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)
{
nsCOMPtr<nsIDocument> doc(do_QueryInterface(aDocumentID));
if (doc) {
nsIPresShell *pres = doc->GetShellAt(0);
if (pres) {
nsCOMPtr<nsIPresContext> presContext;
pres->GetPresContext(getter_AddRefs(presContext));
if (presContext) {
nsCOMPtr<nsISupports> supp = presContext->GetContainer();
if (supp) {
return CallQueryInterface(supp, aResult);
}
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsDocLoaderImpl::Destroy()
{
Stop();
// Remove the document loader from the parent list of loaders...
if (mParent)
{
mParent->RemoveChildGroup(this);
mParent = nsnull;
}
// Release all the information about network requests...
ClearRequestInfoHash();
// Release all the information about registered listeners...
PRInt32 i, count;
count = mListenerInfoList.Count();
for(i=0; i<count; i++) {
nsListenerInfo *info =
NS_STATIC_CAST(nsListenerInfo*, mListenerInfoList.ElementAt(i));
delete info;
}
mListenerInfoList.Clear();
mListenerInfoList.Compact();
mDocumentRequest = 0;
if (mLoadGroup)
mLoadGroup->SetGroupObserver(nsnull);
return NS_OK;
}
NS_IMETHODIMP
nsDocLoaderImpl::OnStartRequest(nsIRequest *request, nsISupports *aCtxt)
{
// called each time a request is added to the group.
#ifdef PR_LOGGING
if (PR_LOG_TEST(gDocLoaderLog, PR_LOG_DEBUG)) {
nsCAutoString name;
request->GetName(name);
PRUint32 count = 0;
if (mLoadGroup)
mLoadGroup->GetActiveCount(&count);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: OnStartRequest[%p](%s) mIsLoadingDocument=%s, %u active URLs",
this, request, name.get(),
(mIsLoadingDocument ? "true" : "false"),
count));
}
#endif /* PR_LOGGING */
PRBool bJustStartedLoading = PR_FALSE;
PRUint32 loadFlags = 0;
request->GetLoadFlags(&loadFlags);
if (!mIsLoadingDocument && (loadFlags & nsIChannel::LOAD_DOCUMENT_URI)) {
bJustStartedLoading = PR_TRUE;
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 request being added to the load group.
//
if (mIsLoadingDocument) {
//
// Create a new nsRequestInfo for the request that is starting to
// load...
//
AddRequestInfo(request);
if (loadFlags & nsIChannel::LOAD_DOCUMENT_URI) {
//
// Make sure that the document channel is null at this point...
// (unless its been redirected)
//
NS_ASSERTION((loadFlags & nsIChannel::LOAD_REPLACE) ||
!(mDocumentRequest.get()),
"Overwriting an existing document channel!");
// This request is associated with the entire document...
mDocumentRequest = request;
mLoadGroup->SetDefaultLoadRequest(request);
// Only fire the start document load notification for the first
// document URI... Do not fire it again for redirections
//
if (bJustStartedLoading) {
// Update the progress status state
mProgressStateFlags = nsIWebProgressListener::STATE_START;
// Fire the start document load notification
doStartDocumentLoad();
return NS_OK;
}
}
}
else {
// The DocLoader is not busy, so clear out any cached information...
ClearRequestInfoHash();
}
NS_ASSERTION(!mIsLoadingDocument || mDocumentRequest,
"mDocumentRequest MUST be set for the duration of a page load!");
doStartURLLoad(request);
return NS_OK;
}
NS_IMETHODIMP
nsDocLoaderImpl::OnStopRequest(nsIRequest *aRequest,
nsISupports *aCtxt,
nsresult aStatus)
{
nsresult rv = NS_OK;
#ifdef PR_LOGGING
if (PR_LOG_TEST(gDocLoaderLog, PR_LOG_DEBUG)) {
nsCAutoString name;
aRequest->GetName(name);
PRUint32 count = 0;
if (mLoadGroup)
mLoadGroup->GetActiveCount(&count);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: OnStopRequest[%p](%s) status=%x mIsLoadingDocument=%s, %u active URLs",
this, aRequest, name.get(),
aStatus, (mIsLoadingDocument ? "true" : "false"),
count));
}
#endif
//
// Only fire the OnEndDocumentLoad(...) if the document loader
// has initiated a load...
//
if (mIsLoadingDocument) {
PRUint32 count;
PRBool bFireTransferring = PR_FALSE;
//
// 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)
//
nsRequestInfo *info;
info = GetRequestInfo(aRequest);
if (info) {
PRInt32 oldMax = info->mMaxProgress;
info->mMaxProgress = info->mCurrentProgress;
//
// If a request 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);
}
//
// Determine whether a STATE_TRANSFERRING notification should be
// 'synthesized'.
//
// If nsRequestInfo::mMaxProgress (as stored in oldMax) and
// nsRequestInfo::mCurrentProgress are both 0, then the
// STATE_TRANSFERRING notification has not been fired yet...
//
if ((oldMax == 0) && (info->mCurrentProgress == 0)) {
nsCOMPtr<nsIChannel> channel(do_QueryInterface(aRequest));
// Only fire a TRANSFERRING notification if the request is also a
// channel -- data transfer requires a nsIChannel!
//
if (channel) {
if (NS_SUCCEEDED(aStatus)) {
bFireTransferring = PR_TRUE;
}
//
// If the request failed (for any reason other than being
// redirected), the TRANSFERRING notification can still be fired
// if a HTTP connection was established to a server.
//
else if (aStatus != NS_BINDING_REDIRECTED) {
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(aRequest));
if (httpChannel) {
PRUint32 responseCode;
rv = httpChannel->GetResponseStatus(&responseCode);
if (NS_SUCCEEDED(rv)) {
//
// A valid server status indicates that a connection was
// established to the server... So, fire the notification
// even though a failure occurred later...
//
bFireTransferring = PR_TRUE;
}
}
}
}
}
}
if (bFireTransferring) {
// Send a STATE_TRANSFERRING notification for the request.
PRInt32 flags;
flags = nsIWebProgressListener::STATE_TRANSFERRING |
nsIWebProgressListener::STATE_IS_REQUEST;
//
// Move the WebProgress into the STATE_TRANSFERRING state if necessary...
//
if (mProgressStateFlags & nsIWebProgressListener::STATE_START) {
mProgressStateFlags = nsIWebProgressListener::STATE_TRANSFERRING;
// Send STATE_TRANSFERRING for the document too...
flags |= nsIWebProgressListener::STATE_IS_DOCUMENT;
}
FireOnStateChange(this, aRequest, flags, NS_OK);
}
//
// Fire the OnStateChange(...) notification for stop request
//
doStopURLLoad(aRequest, aStatus);
rv = mLoadGroup->GetActiveCount(&count);
if (NS_FAILED(rv)) return rv;
//
// The load group for this DocumentLoader is idle...
//
if (0 == count) {
DocLoaderIsEmpty();
}
}
else {
doStopURLLoad(aRequest, aStatus);
}
return NS_OK;
}
nsresult nsDocLoaderImpl::RemoveChildGroup(nsDocLoaderImpl* aLoader)
{
nsresult rv = NS_OK;
if (NS_SUCCEEDED(rv)) {
mChildList.RemoveObject((nsIDocumentLoader*)aLoader);
}
return rv;
}
NS_IMETHODIMP nsDocLoaderImpl::GetDocumentChannel(nsIChannel ** aChannel)
{
if (!mDocumentRequest) {
*aChannel = nsnull;
return NS_OK;
}
return CallQueryInterface(mDocumentRequest, aChannel);
}
void nsDocLoaderImpl::DocLoaderIsEmpty()
{
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<nsIRequest> docRequest = mDocumentRequest;
NS_ASSERTION(mDocumentRequest, "No Document Request!");
mDocumentRequest = 0;
mIsLoadingDocument = PR_FALSE;
// Update the progress status state - the document is done
mProgressStateFlags = nsIWebProgressListener::STATE_STOP;
nsresult loadGroupStatus = NS_OK;
mLoadGroup->GetStatus(&loadGroupStatus);
//
// New code to break the circular reference between
// the load group and the docloader...
//
mLoadGroup->SetDefaultLoadRequest(nsnull);
//
// Do nothing after firing the OnEndDocumentLoad(...). The document
// loader may be loading a *new* document - if LoadDocument()
// was called from a handler!
//
doStopDocumentLoad(docRequest, loadGroupStatus);
if (mParent) {
mParent->DocLoaderIsEmpty();
}
}
}
}
void nsDocLoaderImpl::doStartDocumentLoad(void)
{
#if defined(DEBUG)
nsCAutoString buffer;
GetURIStringFromRequest(mDocumentRequest, buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: ++ Firing OnStateChange for start document load (...)."
"\tURI: %s \n",
this, buffer.get()));
#endif /* DEBUG */
// Fire an OnStatus(...) notification STATE_START. This indicates
// that the document represented by mDocumentRequest has started to
// load...
FireOnStateChange(this,
mDocumentRequest,
nsIWebProgressListener::STATE_START |
nsIWebProgressListener::STATE_IS_DOCUMENT |
nsIWebProgressListener::STATE_IS_REQUEST |
nsIWebProgressListener::STATE_IS_NETWORK,
NS_OK);
}
void nsDocLoaderImpl::doStartURLLoad(nsIRequest *request)
{
#if defined(DEBUG)
nsCAutoString buffer;
GetURIStringFromRequest(request, buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: ++ Firing OnStateChange start url load (...)."
"\tURI: %s\n",
this, buffer.get()));
#endif /* DEBUG */
FireOnStateChange(this,
request,
nsIWebProgressListener::STATE_START |
nsIWebProgressListener::STATE_IS_REQUEST,
NS_OK);
}
void nsDocLoaderImpl::doStopURLLoad(nsIRequest *request, nsresult aStatus)
{
#if defined(DEBUG)
nsCAutoString buffer;
GetURIStringFromRequest(request, buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: ++ Firing OnStateChange for end url load (...)."
"\tURI: %s status=%x\n",
this, buffer.get(), aStatus));
#endif /* DEBUG */
FireOnStateChange(this,
request,
nsIWebProgressListener::STATE_STOP |
nsIWebProgressListener::STATE_IS_REQUEST,
aStatus);
}
void nsDocLoaderImpl::doStopDocumentLoad(nsIRequest *request,
nsresult aStatus)
{
#if defined(DEBUG)
nsCAutoString buffer;
GetURIStringFromRequest(request, buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: ++ Firing OnStateChange for end document load (...)."
"\tURI: %s Status=%x\n",
this, buffer.get(), aStatus));
#endif /* DEBUG */
//
// Fire an OnStateChange(...) notification indicating the the
// current document has finished loading...
//
FireOnStateChange(this,
request,
nsIWebProgressListener::STATE_STOP |
nsIWebProgressListener::STATE_IS_DOCUMENT,
aStatus);
//
// Fire a final OnStateChange(...) notification indicating the the
// current document has finished loading...
//
FireOnStateChange(this,
request,
nsIWebProgressListener::STATE_STOP |
nsIWebProgressListener::STATE_IS_WINDOW |
nsIWebProgressListener::STATE_IS_NETWORK,
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,
PRUint32 aNotifyMask)
{
nsresult rv;
nsWeakPtr listener = do_GetWeakReference(aListener);
if (!listener) {
return NS_ERROR_INVALID_ARG;
}
nsListenerInfo* info = GetListenerInfo(listener);
if (info) {
// The listener is already registered!
return NS_ERROR_FAILURE;
}
info = new nsListenerInfo(listener, aNotifyMask);
if (!info) {
return NS_ERROR_OUT_OF_MEMORY;
}
rv = mListenerInfoList.AppendElement(info) ? NS_OK : NS_ERROR_FAILURE;
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::RemoveProgressListener(nsIWebProgressListener *aListener)
{
nsresult rv;
nsWeakPtr listener = do_GetWeakReference(aListener);
if (!listener) {
return NS_ERROR_INVALID_ARG;
}
nsListenerInfo* info = GetListenerInfo(listener);
if (info) {
rv = mListenerInfoList.RemoveElement(info) ? NS_OK : NS_ERROR_FAILURE;
delete info;
} else {
// The listener is not registered!
rv = NS_ERROR_FAILURE;
}
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::GetDOMWindow(nsIDOMWindow **aResult)
{
nsresult rv = NS_OK;
*aResult = nsnull;
//
// The DOM Window is available from the associated container (ie DocShell)
// if one is available...
//
if (mContainer) {
nsCOMPtr<nsIDOMWindow> window(do_GetInterface(mContainer, &rv));
*aResult = window;
NS_IF_ADDREF(*aResult);
} else {
rv = NS_ERROR_FAILURE;
}
return rv;
}
NS_IMETHODIMP
nsDocLoaderImpl::GetIsLoadingDocument(PRBool *aIsLoadingDocument)
{
*aIsLoadingDocument = mIsLoadingDocument;
return NS_OK;
}
nsresult nsDocLoaderImpl::GetMaxTotalProgress(PRInt32 *aMaxTotalProgress)
{
PRInt32 count = 0;
PRInt32 invididualProgress, newMaxTotal;
newMaxTotal = 0;
count = mChildList.Count();
nsCOMPtr<nsIWebProgress> webProgress;
nsCOMPtr<nsIDocumentLoader> docloader;
for (PRInt32 i=0; i < count; i++)
{
invididualProgress = 0;
docloader = mChildList.ObjectAt(i);
if (docloader)
{
// Cast is safe since all children are nsDocLoaderImpl too
((nsDocLoaderImpl *) docloader.get())->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 request 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(nsIRequest *aRequest, nsISupports* ctxt,
PRUint32 aProgress, PRUint32 aProgressMax)
{
nsRequestInfo *info;
PRInt32 progressDelta = 0;
//
// Update the RequestInfo entry with the new progress data
//
info = GetRequestInfo(aRequest);
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 STATE_TRANSFERRING notification for the request.
PRInt32 flags;
flags = nsIWebProgressListener::STATE_TRANSFERRING |
nsIWebProgressListener::STATE_IS_REQUEST;
//
// Move the WebProgress into the STATE_TRANSFERRING state if necessary...
//
if (mProgressStateFlags & nsIWebProgressListener::STATE_START) {
mProgressStateFlags = nsIWebProgressListener::STATE_TRANSFERRING;
// Send STATE_TRANSFERRING for the document too...
flags |= nsIWebProgressListener::STATE_IS_DOCUMENT;
}
FireOnStateChange(this, aRequest, flags, NS_OK);
}
// Update the current progress count...
progressDelta = aProgress - info->mCurrentProgress;
mCurrentSelfProgress += progressDelta;
info->mCurrentProgress = aProgress;
}
//
// The request is not part of the load group, so ignore its progress
// information...
//
else {
#if defined(DEBUG)
nsCAutoString buffer;
GetURIStringFromRequest(aRequest, buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p OOPS - No Request Info for: %s\n",
this, buffer.get()));
#endif /* DEBUG */
return NS_OK;
}
//
// Fire progress notifications out to any registered nsIWebProgressListeners
//
FireOnProgressChange(this, aRequest, aProgress, aProgressMax, progressDelta,
mCurrentTotalProgress, mMaxTotalProgress);
return NS_OK;
}
NS_IMETHODIMP nsDocLoaderImpl::OnStatus(nsIRequest* aRequest, nsISupports* ctxt,
nsresult aStatus, const PRUnichar* aStatusArg)
{
//
// Fire progress notifications out to any registered nsIWebProgressListeners
//
if (aStatus) {
nsresult rv;
nsCOMPtr<nsIStringBundleService> sbs = do_GetService(kStringBundleServiceCID, &rv);
if (NS_FAILED(rv)) return rv;
nsXPIDLString msg;
rv = sbs->FormatStatusMessage(aStatus, aStatusArg, getter_Copies(msg));
if (NS_FAILED(rv)) return rv;
FireOnStatusChange(this, aRequest, aStatus, msg);
}
return NS_OK;
}
void nsDocLoaderImpl::ClearInternalProgress()
{
ClearRequestInfoHash();
mCurrentSelfProgress = mMaxSelfProgress = 0;
mCurrentTotalProgress = mMaxTotalProgress = 0;
mProgressStateFlags = nsIWebProgressListener::STATE_STOP;
}
void nsDocLoaderImpl::FireOnProgressChange(nsDocLoaderImpl *aLoadInitiator,
nsIRequest *request,
PRInt32 aProgress,
PRInt32 aProgressMax,
PRInt32 aProgressDelta,
PRInt32 aTotalProgress,
PRInt32 aMaxTotalProgress)
{
if (mIsLoadingDocument) {
mCurrentTotalProgress += aProgressDelta;
GetMaxTotalProgress(&mMaxTotalProgress);
aTotalProgress = mCurrentTotalProgress;
aMaxTotalProgress = mMaxTotalProgress;
}
#if defined(DEBUG)
nsCAutoString buffer;
GetURIStringFromRequest(request, buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: Progress (%s): curSelf: %d maxSelf: %d curTotal: %d maxTotal %d\n",
this, buffer.get(), 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
*/
nsCOMPtr<nsIWebProgressListener> listener;
PRInt32 count = mListenerInfoList.Count();
while (--count >= 0) {
nsListenerInfo *info;
info = NS_STATIC_CAST(nsListenerInfo*,mListenerInfoList.ElementAt(count));
if (!info || !(info->mNotifyMask & nsIWebProgress::NOTIFY_PROGRESS)) {
continue;
}
listener = do_QueryReferent(info->mWeakListener);
if (!listener) {
// the listener went away. gracefully pull it out of the list.
mListenerInfoList.RemoveElementAt(count);
delete info;
continue;
}
listener->OnProgressChange(aLoadInitiator,request,
aProgress, aProgressMax,
aTotalProgress, aMaxTotalProgress);
}
mListenerInfoList.Compact();
// Pass the notification up to the parent...
if (mParent) {
mParent->FireOnProgressChange(aLoadInitiator, request,
aProgress, aProgressMax,
aProgressDelta,
aTotalProgress, aMaxTotalProgress);
}
}
void nsDocLoaderImpl::FireOnStateChange(nsIWebProgress *aProgress,
nsIRequest *aRequest,
PRInt32 aStateFlags,
nsresult aStatus)
{
//
// Remove the STATE_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::STATE_IS_NETWORK) &&
(this != aProgress)) {
aStateFlags &= ~nsIWebProgressListener::STATE_IS_NETWORK;
}
#if defined(DEBUG)
nsCAutoString buffer;
GetURIStringFromRequest(aRequest, buffer);
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: Status (%s): code: %x\n",
this, buffer.get(), aStateFlags));
#endif /* DEBUG */
NS_ASSERTION(aRequest, "Firing OnStateChange(...) notification with a NULL request!");
/*
* 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
*/
nsCOMPtr<nsIWebProgressListener> listener;
PRInt32 count = mListenerInfoList.Count();
while (--count >= 0) {
nsListenerInfo *info;
info = NS_STATIC_CAST(nsListenerInfo*,mListenerInfoList.ElementAt(count));
if (!info || !(info->mNotifyMask & (aStateFlags >>16))) {
continue;
}
listener = do_QueryReferent(info->mWeakListener);
if (!listener) {
// the listener went away. gracefully pull it out of the list.
mListenerInfoList.RemoveElementAt(count);
delete info;
continue;
}
listener->OnStateChange(aProgress, aRequest, aStateFlags, aStatus);
}
mListenerInfoList.Compact();
// Pass the notification up to the parent...
if (mParent) {
mParent->FireOnStateChange(aProgress, aRequest, aStateFlags, aStatus);
}
}
NS_IMETHODIMP
nsDocLoaderImpl::FireOnLocationChange(nsIWebProgress* aWebProgress,
nsIRequest* aRequest,
nsIURI *aUri)
{
/*
* 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
*/
nsCOMPtr<nsIWebProgressListener> listener;
PRInt32 count = mListenerInfoList.Count();
while (--count >= 0) {
nsListenerInfo *info;
info = NS_STATIC_CAST(nsListenerInfo*,mListenerInfoList.ElementAt(count));
if (!info || !(info->mNotifyMask & nsIWebProgress::NOTIFY_LOCATION)) {
continue;
}
listener = do_QueryReferent(info->mWeakListener);
if (!listener) {
// the listener went away. gracefully pull it out of the list.
mListenerInfoList.RemoveElementAt(count);
delete info;
continue;
}
listener->OnLocationChange(aWebProgress, aRequest, aUri);
}
mListenerInfoList.Compact();
// Pass the notification up to the parent...
if (mParent) {
mParent->FireOnLocationChange(aWebProgress, aRequest, aUri);
}
return NS_OK;
}
NS_IMETHODIMP
nsDocLoaderImpl::FireOnStatusChange(nsIWebProgress* aWebProgress,
nsIRequest* aRequest,
nsresult aStatus,
const PRUnichar* aMessage)
{
/*
* 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
*/
nsCOMPtr<nsIWebProgressListener> listener;
PRInt32 count = mListenerInfoList.Count();
while (--count >= 0) {
nsListenerInfo *info;
info = NS_STATIC_CAST(nsListenerInfo*,mListenerInfoList.ElementAt(count));
if (!info || !(info->mNotifyMask & nsIWebProgress::NOTIFY_STATUS)) {
continue;
}
listener = do_QueryReferent(info->mWeakListener);
if (!listener) {
// the listener went away. gracefully pull it out of the list.
mListenerInfoList.RemoveElementAt(count);
delete info;
continue;
}
listener->OnStatusChange(aWebProgress, aRequest, aStatus, aMessage);
}
mListenerInfoList.Compact();
// Pass the notification up to the parent...
if (mParent) {
mParent->FireOnStatusChange(aWebProgress, aRequest, aStatus, aMessage);
}
return NS_OK;
}
nsListenerInfo *
nsDocLoaderImpl::GetListenerInfo(nsIWeakReference *aListener)
{
PRInt32 i, count;
nsListenerInfo *info;
count = mListenerInfoList.Count();
for (i=0; i<count; i++) {
info = NS_STATIC_CAST(nsListenerInfo* ,mListenerInfoList.ElementAt(i));
NS_ASSERTION(info, "There should NEVER be a null listener in the list");
if (info && (aListener == info->mWeakListener)) {
return info;
}
}
return nsnull;
}
nsresult nsDocLoaderImpl::AddRequestInfo(nsIRequest *aRequest)
{
if (!PL_DHashTableOperate(&mRequestInfoHash, aRequest, PL_DHASH_ADD)) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
nsRequestInfo * nsDocLoaderImpl::GetRequestInfo(nsIRequest *aRequest)
{
nsRequestInfo *info =
NS_STATIC_CAST(nsRequestInfo *,
PL_DHashTableOperate(&mRequestInfoHash, aRequest,
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_FREE(info)) {
// Nothing found in the hash, return null.
return nsnull;
}
// Return what we found in the hash...
return info;
}
// PLDHashTable enumeration callback that just removes every entry
// from the hash.
PR_STATIC_CALLBACK(PLDHashOperator)
RemoveInfoCallback(PLDHashTable *table, PLDHashEntryHdr *hdr, PRUint32 number,
void *arg)
{
return PL_DHASH_REMOVE;
}
void nsDocLoaderImpl::ClearRequestInfoHash(void)
{
if (!mRequestInfoHash.ops || !mRequestInfoHash.entryCount) {
// No hash, or the hash is empty, nothing to do here then...
return;
}
PL_DHashTableEnumerate(&mRequestInfoHash, RemoveInfoCallback, nsnull);
}
// PLDHashTable enumeration callback that calculates the max progress.
PR_STATIC_CALLBACK(PLDHashOperator)
CalcMaxProgressCallback(PLDHashTable *table, PLDHashEntryHdr *hdr,
PRUint32 number, void *arg)
{
const nsRequestInfo *info = NS_STATIC_CAST(const nsRequestInfo *, hdr);
PRInt32 *max = NS_STATIC_CAST(PRInt32 *, arg);
if (info->mMaxProgress < info->mCurrentProgress) {
*max = -1;
return PL_DHASH_STOP;
}
*max += info->mMaxProgress;
return PL_DHASH_NEXT;
}
void nsDocLoaderImpl::CalculateMaxProgress(PRInt32 *aMax)
{
*aMax = 0;
PL_DHashTableEnumerate(&mRequestInfoHash, CalcMaxProgressCallback, aMax);
}
NS_IMETHODIMP nsDocLoaderImpl::OnRedirect(nsIHttpChannel *aOldChannel, nsIChannel *aNewChannel)
{
if (aOldChannel)
{
nsresult rv;
nsCOMPtr<nsIURI> oldURI, newURI;
rv = aOldChannel->GetOriginalURI(getter_AddRefs(oldURI));
if (NS_FAILED(rv)) return rv;
rv = aNewChannel->GetURI(getter_AddRefs(newURI));
if (NS_FAILED(rv)) return rv;
#ifdef HTTP_DOESNT_CALL_CHECKLOADURI
// verify that this is a legal redirect
nsCOMPtr<nsIScriptSecurityManager> securityManager =
do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
rv = securityManager->CheckLoadURI(oldURI, newURI,
nsIScriptSecurityManager::DISALLOW_FROM_MAIL);
if (NS_FAILED(rv)) return rv;
#endif
nsLoadFlags loadFlags = 0;
PRInt32 stateFlags = nsIWebProgressListener::STATE_REDIRECTING |
nsIWebProgressListener::STATE_IS_REQUEST;
aOldChannel->GetLoadFlags(&loadFlags);
// If the document channel is being redirected, then indicate that the
// document is being redirected in the notification...
if (loadFlags & nsIChannel::LOAD_DOCUMENT_URI)
{
stateFlags |= nsIWebProgressListener::STATE_IS_DOCUMENT;
#if defined(DEBUG)
nsCOMPtr<nsIRequest> request(do_QueryInterface(aOldChannel));
NS_ASSERTION(request == mDocumentRequest, "Wrong Document Channel");
#endif /* DEBUG */
}
FireOnStateChange(this, aOldChannel, stateFlags, NS_OK);
}
return NS_OK;
}
/*
* Implementation of nsISecurityEventSink method...
*/
NS_IMETHODIMP nsDocLoaderImpl::OnSecurityChange(nsISupports * aContext,
PRUint32 aState)
{
//
// Fire progress notifications out to any registered nsIWebProgressListeners.
//
nsCOMPtr<nsIRequest> request = do_QueryInterface(aContext);
nsIWebProgress* webProgress = NS_STATIC_CAST(nsIWebProgress*, this);
/*
* 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
*/
nsCOMPtr<nsIWebProgressListener> listener;
PRInt32 count = mListenerInfoList.Count();
while (--count >= 0) {
nsListenerInfo *info;
info = NS_STATIC_CAST(nsListenerInfo*,mListenerInfoList.ElementAt(count));
if (!info || !(info->mNotifyMask & nsIWebProgress::NOTIFY_SECURITY)) {
continue;
}
listener = do_QueryReferent(info->mWeakListener);
if (!listener) {
// the listener went away. gracefully pull it out of the list.
mListenerInfoList.RemoveElementAt(count);
delete info;
continue;
}
listener->OnSecurityChange(webProgress, request, aState);
}
mListenerInfoList.Compact();
// Pass the notification up to the parent...
if (mParent) {
mParent->OnSecurityChange(aContext, aState);
}
return NS_OK;
}
#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)
nsCAutoString buffer;
nsresult rv = NS_OK;
if (info->mURI) {
rv = info->mURI->GetSpec(buffer);
}
printf(" [%d] current=%d max=%d [%s]\n", i,
info->mCurrentProgress,
info->mMaxProgress, buffer.get());
#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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