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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 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nspr.h"
#include "prlog.h"
#include "nsDocLoader.h"
#include "nsCURILoader.h"
#include "nsNetUtil.h"
#include "nsIHttpChannel.h"
#include "nsIWebProgressListener2.h"
#include "nsIServiceManager.h"
#include "nsXPIDLString.h"
#include "nsIURL.h"
#include "nsCOMPtr.h"
#include "nscore.h"
#include "nsWeakPtr.h"
#include "nsAutoPtr.h"
#include "nsIDOMWindow.h"
#include "nsIStringBundle.h"
#include "nsIScriptSecurityManager.h"
#include "nsITransport.h"
#include "nsISocketTransport.h"
#include "nsIDOMDocument.h"
#include "nsIDocument.h"
#include "nsPresContext.h"
#include "nsIAsyncVerifyRedirectCallback.h"
static NS_DEFINE_CID(kThisImplCID, NS_THIS_DOCLOADER_IMPL_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 = nullptr;
#endif /* PR_LOGGING */
#if defined(DEBUG)
void GetURIStringFromRequest(nsIRequest* request, nsACString &name)
{
if (request)
request->GetName(name);
else
name.AssignLiteral("???");
}
#endif /* DEBUG */
bool
nsDocLoader::RequestInfoHashInitEntry(PLDHashTable* table,
PLDHashEntryHdr* entry,
const void* key)
{
// Initialize the entry with placement new
new (entry) nsRequestInfo(key);
return true;
}
void
nsDocLoader::RequestInfoHashClearEntry(PLDHashTable* table,
PLDHashEntryHdr* entry)
{
nsRequestInfo* info = static_cast<nsRequestInfo *>(entry);
info->~nsRequestInfo();
}
// this is used for mListenerInfoList.Contains()
template <>
class nsDefaultComparator <nsDocLoader::nsListenerInfo, nsIWebProgressListener*> {
public:
bool Equals(const nsDocLoader::nsListenerInfo& aInfo,
nsIWebProgressListener* const& aListener) const {
nsCOMPtr<nsIWebProgressListener> listener =
do_QueryReferent(aInfo.mWeakListener);
return aListener == listener;
}
};
nsDocLoader::nsDocLoader()
: mParent(nullptr),
mCurrentSelfProgress(0),
mMaxSelfProgress(0),
mCurrentTotalProgress(0),
mMaxTotalProgress(0),
mCompletedTotalProgress(0),
mIsLoadingDocument(false),
mIsRestoringDocument(false),
mDontFlushLayout(false),
mIsFlushingLayout(false)
{
#if defined(PR_LOGGING)
if (nullptr == gDocLoaderLog) {
gDocLoaderLog = PR_NewLogModule("DocLoader");
}
#endif /* PR_LOGGING */
static const PLDHashTableOps hash_table_ops =
{
PL_DHashAllocTable,
PL_DHashFreeTable,
PL_DHashVoidPtrKeyStub,
PL_DHashMatchEntryStub,
PL_DHashMoveEntryStub,
RequestInfoHashClearEntry,
PL_DHashFinalizeStub,
RequestInfoHashInitEntry
};
PL_DHashTableInit(&mRequestInfoHash, &hash_table_ops, nullptr,
sizeof(nsRequestInfo), 16);
ClearInternalProgress();
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: created.\n", this));
}
nsresult
nsDocLoader::SetDocLoaderParent(nsDocLoader *aParent)
{
mParent = aParent;
return NS_OK;
}
nsresult
nsDocLoader::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;
}
nsDocLoader::~nsDocLoader()
{
/*
|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]
*/
// XXXbz now that NS_IMPL_RELEASE stabilizes by setting refcount to 1, is
// this needed?
ClearWeakReferences();
Destroy();
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: deleted.\n", this));
if (mRequestInfoHash.ops) {
PL_DHashTableFinish(&mRequestInfoHash);
}
}
/*
* Implementation of ISupports methods...
*/
NS_IMPL_ADDREF(nsDocLoader)
NS_IMPL_RELEASE(nsDocLoader)
NS_INTERFACE_MAP_BEGIN(nsDocLoader)
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(nsIChannelEventSink)
NS_INTERFACE_MAP_ENTRY(nsISecurityEventSink)
NS_INTERFACE_MAP_ENTRY(nsISupportsPriority)
if (aIID.Equals(kThisImplCID))
foundInterface = static_cast<nsIDocumentLoader *>(this);
else
NS_INTERFACE_MAP_END
/*
* Implementation of nsIInterfaceRequestor methods...
*/
NS_IMETHODIMP nsDocLoader::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;
}
/* static */
already_AddRefed<nsDocLoader>
nsDocLoader::GetAsDocLoader(nsISupports* aSupports)
{
nsRefPtr<nsDocLoader> ret = do_QueryObject(aSupports);
return ret.forget();
}
/* static */
nsresult
nsDocLoader::AddDocLoaderAsChildOfRoot(nsDocLoader* aDocLoader)
{
nsresult rv;
nsCOMPtr<nsIDocumentLoader> docLoaderService =
do_GetService(NS_DOCUMENTLOADER_SERVICE_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsRefPtr<nsDocLoader> rootDocLoader = GetAsDocLoader(docLoaderService);
NS_ENSURE_TRUE(rootDocLoader, NS_ERROR_UNEXPECTED);
return rootDocLoader->AddChildLoader(aDocLoader);
}
NS_IMETHODIMP
nsDocLoader::Stop(void)
{
nsresult rv = NS_OK;
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: Stop() called\n", this));
NS_OBSERVER_ARRAY_NOTIFY_XPCOM_OBSERVERS(mChildList, nsDocLoader, Stop, ());
if (mLoadGroup)
rv = mLoadGroup->Cancel(NS_BINDING_ABORTED);
// Don't report that we're flushing layout so IsBusy returns false after a
// Stop call.
mIsFlushingLayout = false;
// Clear out mChildrenInOnload. We want to make sure to fire our
// onload at this point, and there's no issue with mChildrenInOnload
// after this, since mDocumentRequest will be null after the
// DocLoaderIsEmpty() call.
mChildrenInOnload.Clear();
// Make sure to call DocLoaderIsEmpty now so that we reset mDocumentRequest,
// etc, as needed. We could be getting into here from a subframe onload, in
// which case the call to DocLoaderIsEmpty() is coming but hasn't quite
// happened yet, Canceling the loadgroup did nothing (because it was already
// empty), and we're about to start a new load (which is what triggered this
// Stop() call).
// XXXbz If the child frame loadgroups were requests in mLoadgroup, I suspect
// we wouldn't need the call here....
NS_ASSERTION(!IsBusy(), "Shouldn't be busy here");
DocLoaderIsEmpty(false);
return rv;
}
bool
nsDocLoader::IsBusy()
{
nsresult rv;
//
// A document loader is busy if either:
//
// 1. One of its children is in the middle of an onload handler. Note that
// the handler may have already removed this child from mChildList!
// 2. It is currently loading a document and either has parts of it still
// loading, or has a busy child docloader.
// 3. It's currently flushing layout in DocLoaderIsEmpty().
//
if (mChildrenInOnload.Count() || mIsFlushingLayout) {
return true;
}
/* Is this document loader busy? */
if (!mIsLoadingDocument) {
return false;
}
bool busy;
rv = mLoadGroup->IsPending(&busy);
if (NS_FAILED(rv)) {
return false;
}
if (busy) {
return true;
}
/* check its child document loaders... */
uint32_t count = mChildList.Length();
for (uint32_t i=0; i < count; i++) {
nsIDocumentLoader* loader = ChildAt(i);
// This is a safe cast, because we only put nsDocLoader objects into the
// array
if (loader && static_cast<nsDocLoader*>(loader)->IsBusy())
return true;
}
return false;
}
NS_IMETHODIMP
nsDocLoader::GetContainer(nsISupports** aResult)
{
NS_ADDREF(*aResult = static_cast<nsIDocumentLoader*>(this));
return NS_OK;
}
NS_IMETHODIMP
nsDocLoader::GetLoadGroup(nsILoadGroup** aResult)
{
nsresult rv = NS_OK;
if (nullptr == aResult) {
rv = NS_ERROR_NULL_POINTER;
} else {
*aResult = mLoadGroup;
NS_IF_ADDREF(*aResult);
}
return rv;
}
void
nsDocLoader::Destroy()
{
Stop();
// Remove the document loader from the parent list of loaders...
if (mParent)
{
mParent->RemoveChildLoader(this);
}
// Release all the information about network requests...
ClearRequestInfoHash();
mListenerInfoList.Clear();
mListenerInfoList.Compact();
mDocumentRequest = 0;
if (mLoadGroup)
mLoadGroup->SetGroupObserver(nullptr);
DestroyChildren();
}
void
nsDocLoader::DestroyChildren()
{
uint32_t count = mChildList.Length();
// 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
for (uint32_t i=0; i < count; i++)
{
nsIDocumentLoader* loader = ChildAt(i);
if (loader) {
// This is a safe cast, as we only put nsDocLoader objects into the
// array
static_cast<nsDocLoader*>(loader)->SetDocLoaderParent(nullptr);
}
}
mChildList.Clear();
}
NS_IMETHODIMP
nsDocLoader::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)) {
nsAutoCString name;
request->GetName(name);
uint32_t 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 */
bool bJustStartedLoading = false;
nsLoadFlags loadFlags = 0;
request->GetLoadFlags(&loadFlags);
if (!mIsLoadingDocument && (loadFlags & nsIChannel::LOAD_DOCUMENT_URI)) {
bJustStartedLoading = true;
mIsLoadingDocument = true;
ClearInternalProgress(); // only clear our progress if we are starting a new load....
}
//
// Create a new nsRequestInfo for the request that is starting to
// load...
//
AddRequestInfo(request);
//
// Only fire a doStartDocumentLoad(...) if the document loader
// has initiated a load... Otherwise, this notification has
// resulted from a request being added to the load group.
//
if (mIsLoadingDocument) {
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;
}
}
}
NS_ASSERTION(!mIsLoadingDocument || mDocumentRequest,
"mDocumentRequest MUST be set for the duration of a page load!");
doStartURLLoad(request);
return NS_OK;
}
NS_IMETHODIMP
nsDocLoader::OnStopRequest(nsIRequest *aRequest,
nsISupports *aCtxt,
nsresult aStatus)
{
nsresult rv = NS_OK;
#ifdef PR_LOGGING
if (PR_LOG_TEST(gDocLoaderLog, PR_LOG_DEBUG)) {
nsAutoCString name;
aRequest->GetName(name);
uint32_t 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
bool bFireTransferring = 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 = GetRequestInfo(aRequest);
if (info) {
// Null out mLastStatus now so we don't find it when looking for
// status from now on. This destroys the nsStatusInfo and hence
// removes it from our list.
info->mLastStatus = nullptr;
int64_t 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 < int64_t(0)) && (mMaxSelfProgress < int64_t(0))) {
mMaxSelfProgress = CalculateMaxProgress();
}
// As we know the total progress of this request now, save it to be part
// of CalculateMaxProgress() result. We need to remove the info from the
// hash, see bug 480713.
mCompletedTotalProgress += info->mMaxProgress;
//
// 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 = true;
}
//
// If the request failed (for any reason other than being
// redirected or retargeted), the TRANSFERRING notification can
// still be fired if a HTTP connection was established to a server.
//
else if (aStatus != NS_BINDING_REDIRECTED &&
aStatus != NS_BINDING_RETARGETED) {
//
// Only if the load has been targeted (see bug 268483)...
//
uint32_t lf;
channel->GetLoadFlags(&lf);
if (lf & nsIChannel::LOAD_TARGETED) {
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(aRequest));
if (httpChannel) {
uint32_t 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 = true;
}
}
}
}
}
}
}
if (bFireTransferring) {
// Send a STATE_TRANSFERRING notification for the request.
int32_t 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);
// Clear this request out of the hash to avoid bypass of FireOnStateChange
// when address of the request is reused.
RemoveRequestInfo(aRequest);
//
// Only fire the DocLoaderIsEmpty(...) if the document loader has initiated a
// load. This will handle removing the request from our hashtable as needed.
//
if (mIsLoadingDocument) {
DocLoaderIsEmpty(true);
}
return NS_OK;
}
nsresult nsDocLoader::RemoveChildLoader(nsDocLoader* aChild)
{
nsresult rv = mChildList.RemoveElement(aChild) ? NS_OK : NS_ERROR_FAILURE;
if (NS_SUCCEEDED(rv)) {
aChild->SetDocLoaderParent(nullptr);
}
return rv;
}
nsresult nsDocLoader::AddChildLoader(nsDocLoader* aChild)
{
nsresult rv = mChildList.AppendElement(aChild) ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
if (NS_SUCCEEDED(rv)) {
aChild->SetDocLoaderParent(this);
}
return rv;
}
NS_IMETHODIMP nsDocLoader::GetDocumentChannel(nsIChannel ** aChannel)
{
if (!mDocumentRequest) {
*aChannel = nullptr;
return NS_OK;
}
return CallQueryInterface(mDocumentRequest, aChannel);
}
void nsDocLoader::DocLoaderIsEmpty(bool aFlushLayout)
{
if (mIsLoadingDocument) {
/* 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);
// Don't flush layout if we're still busy.
if (IsBusy()) {
return;
}
NS_ASSERTION(!mIsFlushingLayout, "Someone screwed up");
// The load group for this DocumentLoader is idle. Flush if we need to.
if (aFlushLayout && !mDontFlushLayout) {
nsCOMPtr<nsIDOMDocument> domDoc = do_GetInterface(GetAsSupports(this));
nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
if (doc) {
// We start loads from style resolution, so we need to flush out style
// no matter what. If we have user fonts, we also need to flush layout,
// since the reflow is what starts font loads.
mozFlushType flushType = Flush_Style;
nsIPresShell* shell = doc->GetShell();
if (shell) {
// Be safe in case this presshell is in teardown now
nsPresContext* presContext = shell->GetPresContext();
if (presContext && presContext->GetUserFontSet()) {
flushType = Flush_Layout;
}
}
mDontFlushLayout = mIsFlushingLayout = true;
doc->FlushPendingNotifications(flushType);
mDontFlushLayout = mIsFlushingLayout = false;
}
}
// And now check whether we're really busy; that might have changed with
// the layout flush.
if (!IsBusy()) {
// Clear out our request info hash, now that our load really is done and
// we don't need it anymore to CalculateMaxProgress().
ClearInternalProgress();
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 = 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(nullptr);
// Take a ref to our parent now so that we can call DocLoaderIsEmpty() on
// it even if our onload handler removes us from the docloader tree.
nsRefPtr<nsDocLoader> parent = mParent;
// Note that if calling ChildEnteringOnload() on the parent returns false
// then calling our onload handler is not safe. That can only happen on
// OOM, so that's ok.
if (!parent || parent->ChildEnteringOnload(this)) {
// Do nothing with our state after firing the
// OnEndDocumentLoad(...). The document loader may be loading a *new*
// document - if LoadDocument() was called from a handler!
//
doStopDocumentLoad(docRequest, loadGroupStatus);
if (parent) {
parent->ChildDoneWithOnload(this);
}
}
}
}
}
void nsDocLoader::doStartDocumentLoad(void)
{
#if defined(DEBUG)
nsAutoCString 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_WINDOW |
nsIWebProgressListener::STATE_IS_NETWORK,
NS_OK);
}
void nsDocLoader::doStartURLLoad(nsIRequest *request)
{
#if defined(DEBUG)
nsAutoCString 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 nsDocLoader::doStopURLLoad(nsIRequest *request, nsresult aStatus)
{
#if defined(DEBUG)
nsAutoCString 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);
// Fire a status change message for the most recent unfinished
// request to make sure that the displayed status is not outdated.
if (!mStatusInfoList.isEmpty()) {
nsStatusInfo* statusInfo = mStatusInfoList.getFirst();
FireOnStatusChange(this, statusInfo->mRequest,
statusInfo->mStatusCode,
statusInfo->mStatusMessage.get());
}
}
void nsDocLoader::doStopDocumentLoad(nsIRequest *request,
nsresult aStatus)
{
#if defined(DEBUG)
nsAutoCString 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 */
// Firing STATE_STOP|STATE_IS_DOCUMENT will fire onload handlers.
// Grab our parent chain before doing that so we can still dispatch
// STATE_STOP|STATE_IS_WINDW_STATE_IS_NETWORK to them all, even if
// the onload handlers rearrange the docshell tree.
WebProgressList list;
GatherAncestorWebProgresses(list);
//
// Fire an OnStateChange(...) notification indicating the the
// current document has finished loading...
//
int32_t flags = nsIWebProgressListener::STATE_STOP |
nsIWebProgressListener::STATE_IS_DOCUMENT;
for (uint32_t i = 0; i < list.Length(); ++i) {
list[i]->DoFireOnStateChange(this, request, flags, aStatus);
}
//
// Fire a final OnStateChange(...) notification indicating the the
// current document has finished loading...
//
flags = nsIWebProgressListener::STATE_STOP |
nsIWebProgressListener::STATE_IS_WINDOW |
nsIWebProgressListener::STATE_IS_NETWORK;
for (uint32_t i = 0; i < list.Length(); ++i) {
list[i]->DoFireOnStateChange(this, request, flags, aStatus);
}
}
////////////////////////////////////////////////////////////////////////////////////
// The following section contains support for nsIWebProgress and related stuff
////////////////////////////////////////////////////////////////////////////////////
NS_IMETHODIMP
nsDocLoader::AddProgressListener(nsIWebProgressListener *aListener,
uint32_t aNotifyMask)
{
if (mListenerInfoList.Contains(aListener)) {
// The listener is already registered!
return NS_ERROR_FAILURE;
}
nsWeakPtr listener = do_GetWeakReference(aListener);
if (!listener) {
return NS_ERROR_INVALID_ARG;
}
return mListenerInfoList.AppendElement(nsListenerInfo(listener, aNotifyMask)) ?
NS_OK : NS_ERROR_OUT_OF_MEMORY;
}
NS_IMETHODIMP
nsDocLoader::RemoveProgressListener(nsIWebProgressListener *aListener)
{
return mListenerInfoList.RemoveElement(aListener) ? NS_OK : NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsDocLoader::GetDOMWindow(nsIDOMWindow **aResult)
{
return CallGetInterface(this, aResult);
}
NS_IMETHODIMP
nsDocLoader::GetDOMWindowID(uint64_t *aResult)
{
*aResult = 0;
nsCOMPtr<nsIDOMWindow> window;
nsresult rv = GetDOMWindow(getter_AddRefs(window));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsPIDOMWindow> piwindow = do_QueryInterface(window);
NS_ENSURE_STATE(piwindow);
MOZ_ASSERT(piwindow->IsOuterWindow());
*aResult = piwindow->WindowID();
return NS_OK;
}
NS_IMETHODIMP
nsDocLoader::GetIsTopLevel(bool *aResult)
{
*aResult = false;
nsCOMPtr<nsIDOMWindow> window;
GetDOMWindow(getter_AddRefs(window));
if (window) {
nsCOMPtr<nsPIDOMWindow> piwindow = do_QueryInterface(window);
NS_ENSURE_STATE(piwindow);
nsCOMPtr<nsIDOMWindow> topWindow;
nsresult rv = piwindow->GetTop(getter_AddRefs(topWindow));
NS_ENSURE_SUCCESS(rv, rv);
*aResult = piwindow == topWindow;
}
return NS_OK;
}
NS_IMETHODIMP
nsDocLoader::GetIsLoadingDocument(bool *aIsLoadingDocument)
{
*aIsLoadingDocument = mIsLoadingDocument;
return NS_OK;
}
NS_IMETHODIMP
nsDocLoader::GetLoadType(uint32_t *aLoadType)
{
*aLoadType = 0;
return NS_ERROR_NOT_IMPLEMENTED;
}
int64_t nsDocLoader::GetMaxTotalProgress()
{
int64_t newMaxTotal = 0;
uint32_t count = mChildList.Length();
nsCOMPtr<nsIWebProgress> webProgress;
for (uint32_t i=0; i < count; i++)
{
int64_t individualProgress = 0;
nsIDocumentLoader* docloader = ChildAt(i);
if (docloader)
{
// Cast is safe since all children are nsDocLoader too
individualProgress = ((nsDocLoader *) docloader)->GetMaxTotalProgress();
}
if (individualProgress < int64_t(0)) // if one of the elements doesn't know it's size
// then none of them do
{
newMaxTotal = int64_t(-1);
break;
}
else
newMaxTotal += individualProgress;
}
int64_t progress = -1;
if (mMaxSelfProgress >= int64_t(0) && newMaxTotal >= int64_t(0))
progress = newMaxTotal + mMaxSelfProgress;
return progress;
}
////////////////////////////////////////////////////////////////////////////////////
// The following section contains support for nsIProgressEventSink 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 nsDocLoader::OnProgress(nsIRequest *aRequest, nsISupports* ctxt,
uint64_t aProgress, uint64_t aProgressMax)
{
nsRequestInfo *info;
int64_t progressDelta = 0;
//
// Update the RequestInfo entry with the new progress data
//
info = GetRequestInfo(aRequest);
if (info) {
// suppress sending STATE_TRANSFERRING if this is upload progress (see bug 240053)
if (!info->mUploading && (int64_t(0) == info->mCurrentProgress) && (int64_t(0) == info->mMaxProgress)) {
//
// If we receive an OnProgress event from a toplevel channel that the URI Loader
// has not yet targeted, then we must suppress the event. This is necessary to
// ensure that webprogresslisteners do not get confused when the channel is
// finally targeted. See bug 257308.
//
nsLoadFlags lf = 0;
aRequest->GetLoadFlags(&lf);
if ((lf & nsIChannel::LOAD_DOCUMENT_URI) && !(lf & nsIChannel::LOAD_TARGETED)) {
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p Ignoring OnProgress while load is not targeted\n", this));
return NS_OK;
}
//
// 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 (uint64_t(aProgressMax) != UINT64_MAX) {
mMaxSelfProgress += int64_t(aProgressMax);
info->mMaxProgress = int64_t(aProgressMax);
} else {
mMaxSelfProgress = int64_t(-1);
info->mMaxProgress = int64_t(-1);
}
// Send a STATE_TRANSFERRING notification for the request.
int32_t 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 = int64_t(aProgress) - info->mCurrentProgress;
mCurrentSelfProgress += progressDelta;
info->mCurrentProgress = int64_t(aProgress);
}
//
// The request is not part of the load group, so ignore its progress
// information...
//
else {
#if defined(DEBUG)
nsAutoCString 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 nsDocLoader::OnStatus(nsIRequest* aRequest, nsISupports* ctxt,
nsresult aStatus, const char16_t* aStatusArg)
{
//
// Fire progress notifications out to any registered nsIWebProgressListeners
//
if (aStatus != NS_OK) {
// Remember the current status for this request
nsRequestInfo *info;
info = GetRequestInfo(aRequest);
if (info) {
bool uploading = (aStatus == NS_NET_STATUS_WRITING ||
aStatus == NS_NET_STATUS_SENDING_TO);
// If switching from uploading to downloading (or vice versa), then we
// need to reset our progress counts. This is designed with HTTP form
// submission in mind, where an upload is performed followed by download
// of possibly several documents.
if (info->mUploading != uploading) {
mCurrentSelfProgress = mMaxSelfProgress = 0;
mCurrentTotalProgress = mMaxTotalProgress = 0;
mCompletedTotalProgress = 0;
info->mUploading = uploading;
info->mCurrentProgress = 0;
info->mMaxProgress = 0;
}
}
nsCOMPtr<nsIStringBundleService> sbs =
mozilla::services::GetStringBundleService();
if (!sbs)
return NS_ERROR_FAILURE;
nsXPIDLString msg;
nsresult rv = sbs->FormatStatusMessage(aStatus, aStatusArg,
getter_Copies(msg));
if (NS_FAILED(rv))
return rv;
// Keep around the message. In case a request finishes, we need to make sure
// to send the status message of another request to our user to that we
// don't display, for example, "Transferring" messages for requests that are
// already done.
if (info) {
if (!info->mLastStatus) {
info->mLastStatus = new nsStatusInfo(aRequest);
} else {
// We're going to move it to the front of the list, so remove
// it from wherever it is now.
info->mLastStatus->remove();
}
info->mLastStatus->mStatusMessage = msg;
info->mLastStatus->mStatusCode = aStatus;
// Put the info at the front of the list
mStatusInfoList.insertFront(info->mLastStatus);
}
FireOnStatusChange(this, aRequest, aStatus, msg);
}
return NS_OK;
}
void nsDocLoader::ClearInternalProgress()
{
ClearRequestInfoHash();
mCurrentSelfProgress = mMaxSelfProgress = 0;
mCurrentTotalProgress = mMaxTotalProgress = 0;
mCompletedTotalProgress = 0;
mProgressStateFlags = nsIWebProgressListener::STATE_STOP;
}
/**
* |_code| is executed for every listener matching |_flag|
* |listener| should be used inside |_code| as the nsIWebProgressListener var.
*/
#define NOTIFY_LISTENERS(_flag, _code) \
PR_BEGIN_MACRO \
nsCOMPtr<nsIWebProgressListener> listener; \
ListenerArray::BackwardIterator iter(mListenerInfoList); \
while (iter.HasMore()) { \
nsListenerInfo &info = iter.GetNext(); \
if (!(info.mNotifyMask & (_flag))) { \
continue; \
} \
listener = do_QueryReferent(info.mWeakListener); \
if (!listener) { \
iter.Remove(); \
continue; \
} \
_code \
} \
mListenerInfoList.Compact(); \
PR_END_MACRO
void nsDocLoader::FireOnProgressChange(nsDocLoader *aLoadInitiator,
nsIRequest *request,
int64_t aProgress,
int64_t aProgressMax,
int64_t aProgressDelta,
int64_t aTotalProgress,
int64_t aMaxTotalProgress)
{
if (mIsLoadingDocument) {
mCurrentTotalProgress += aProgressDelta;
mMaxTotalProgress = GetMaxTotalProgress();
aTotalProgress = mCurrentTotalProgress;
aMaxTotalProgress = mMaxTotalProgress;
}
#if defined(DEBUG)
nsAutoCString 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 */
NOTIFY_LISTENERS(nsIWebProgress::NOTIFY_PROGRESS,
// XXX truncates 64-bit to 32-bit
listener->OnProgressChange(aLoadInitiator,request,
int32_t(aProgress), int32_t(aProgressMax),
int32_t(aTotalProgress), int32_t(aMaxTotalProgress));
);
// Pass the notification up to the parent...
if (mParent) {
mParent->FireOnProgressChange(aLoadInitiator, request,
aProgress, aProgressMax,
aProgressDelta,
aTotalProgress, aMaxTotalProgress);
}
}
void nsDocLoader::GatherAncestorWebProgresses(WebProgressList& aList)
{
for (nsDocLoader* loader = this; loader; loader = loader->mParent) {
aList.AppendElement(loader);
}
}
void nsDocLoader::FireOnStateChange(nsIWebProgress *aProgress,
nsIRequest *aRequest,
int32_t aStateFlags,
nsresult aStatus)
{
WebProgressList list;
GatherAncestorWebProgresses(list);
for (uint32_t i = 0; i < list.Length(); ++i) {
list[i]->DoFireOnStateChange(aProgress, aRequest, aStateFlags, aStatus);
}
}
void nsDocLoader::DoFireOnStateChange(nsIWebProgress * const aProgress,
nsIRequest * const aRequest,
int32_t &aStateFlags,
const 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;
}
// Add the STATE_RESTORING bit if necessary.
if (mIsRestoringDocument)
aStateFlags |= nsIWebProgressListener::STATE_RESTORING;
#if defined(DEBUG)
nsAutoCString 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!");
NOTIFY_LISTENERS(((aStateFlags >> 16) & nsIWebProgress::NOTIFY_STATE_ALL),
listener->OnStateChange(aProgress, aRequest, aStateFlags, aStatus);
);
}
void
nsDocLoader::FireOnLocationChange(nsIWebProgress* aWebProgress,
nsIRequest* aRequest,
nsIURI *aUri,
uint32_t aFlags)
{
NOTIFY_LISTENERS(nsIWebProgress::NOTIFY_LOCATION,
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, ("DocLoader [%p] calling %p->OnLocationChange", this, listener.get()));
listener->OnLocationChange(aWebProgress, aRequest, aUri, aFlags);
);
// Pass the notification up to the parent...
if (mParent) {
mParent->FireOnLocationChange(aWebProgress, aRequest, aUri, aFlags);
}
}
void
nsDocLoader::FireOnStatusChange(nsIWebProgress* aWebProgress,
nsIRequest* aRequest,
nsresult aStatus,
const char16_t* aMessage)
{
NOTIFY_LISTENERS(nsIWebProgress::NOTIFY_STATUS,
listener->OnStatusChange(aWebProgress, aRequest, aStatus, aMessage);
);
// Pass the notification up to the parent...
if (mParent) {
mParent->FireOnStatusChange(aWebProgress, aRequest, aStatus, aMessage);
}
}
bool
nsDocLoader::RefreshAttempted(nsIWebProgress* aWebProgress,
nsIURI *aURI,
int32_t aDelay,
bool aSameURI)
{
/*
* Returns true if the refresh may proceed,
* false if the refresh should be blocked.
*/
bool allowRefresh = true;
NOTIFY_LISTENERS(nsIWebProgress::NOTIFY_REFRESH,
nsCOMPtr<nsIWebProgressListener2> listener2 =
do_QueryReferent(info.mWeakListener);
if (!listener2)
continue;
bool listenerAllowedRefresh;
nsresult listenerRV = listener2->OnRefreshAttempted(
aWebProgress, aURI, aDelay, aSameURI, &listenerAllowedRefresh);
if (NS_FAILED(listenerRV))
continue;
allowRefresh = allowRefresh && listenerAllowedRefresh;
);
// Pass the notification up to the parent...
if (mParent) {
allowRefresh = allowRefresh &&
mParent->RefreshAttempted(aWebProgress, aURI, aDelay, aSameURI);
}
return allowRefresh;
}
nsresult nsDocLoader::AddRequestInfo(nsIRequest *aRequest)
{
if (!PL_DHashTableOperate(&mRequestInfoHash, aRequest, PL_DHASH_ADD)) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
void nsDocLoader::RemoveRequestInfo(nsIRequest *aRequest)
{
PL_DHashTableOperate(&mRequestInfoHash, aRequest, PL_DHASH_REMOVE);
}
nsDocLoader::nsRequestInfo* nsDocLoader::GetRequestInfo(nsIRequest* aRequest)
{
nsRequestInfo* info =
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 nullptr;
}
// Return what we found in the hash...
return info;
}
// PLDHashTable enumeration callback that just removes every entry
// from the hash.
static PLDHashOperator
RemoveInfoCallback(PLDHashTable *table, PLDHashEntryHdr *hdr, uint32_t number,
void *arg)
{
return PL_DHASH_REMOVE;
}
void nsDocLoader::ClearRequestInfoHash(void)
{
if (!mRequestInfoHash.ops || !mRequestInfoHash.entryCount) {
// No hash, or the hash is empty, nothing to do here then...
return;
}
PL_DHashTableEnumerate(&mRequestInfoHash, RemoveInfoCallback, nullptr);
}
// PLDHashTable enumeration callback that calculates the max progress.
PLDHashOperator
nsDocLoader::CalcMaxProgressCallback(PLDHashTable* table, PLDHashEntryHdr* hdr,
uint32_t number, void* arg)
{
const nsRequestInfo* info = static_cast<const nsRequestInfo*>(hdr);
int64_t* max = static_cast<int64_t* >(arg);
if (info->mMaxProgress < info->mCurrentProgress) {
*max = int64_t(-1);
return PL_DHASH_STOP;
}
*max += info->mMaxProgress;
return PL_DHASH_NEXT;
}
int64_t nsDocLoader::CalculateMaxProgress()
{
int64_t max = mCompletedTotalProgress;
PL_DHashTableEnumerate(&mRequestInfoHash, CalcMaxProgressCallback, &max);
return max;
}
NS_IMETHODIMP nsDocLoader::AsyncOnChannelRedirect(nsIChannel *aOldChannel,
nsIChannel *aNewChannel,
uint32_t aFlags,
nsIAsyncVerifyRedirectCallback *cb)
{
if (aOldChannel)
{
nsLoadFlags loadFlags = 0;
int32_t 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 */
}
OnRedirectStateChange(aOldChannel, aNewChannel, aFlags, stateFlags);
FireOnStateChange(this, aOldChannel, stateFlags, NS_OK);
}
cb->OnRedirectVerifyCallback(NS_OK);
return NS_OK;
}
/*
* Implementation of nsISecurityEventSink method...
*/
NS_IMETHODIMP nsDocLoader::OnSecurityChange(nsISupports * aContext,
uint32_t aState)
{
//
// Fire progress notifications out to any registered nsIWebProgressListeners.
//
nsCOMPtr<nsIRequest> request = do_QueryInterface(aContext);
nsIWebProgress* webProgress = static_cast<nsIWebProgress*>(this);
NOTIFY_LISTENERS(nsIWebProgress::NOTIFY_SECURITY,
listener->OnSecurityChange(webProgress, request, aState);
);
// Pass the notification up to the parent...
if (mParent) {
mParent->OnSecurityChange(aContext, aState);
}
return NS_OK;
}
/*
* Implementation of nsISupportsPriority methods...
*
* The priority of the DocLoader _is_ the priority of its LoadGroup.
*
* XXX(darin): Once we start storing loadgroups in loadgroups, this code will
* go away.
*/
NS_IMETHODIMP nsDocLoader::GetPriority(int32_t *aPriority)
{
nsCOMPtr<nsISupportsPriority> p = do_QueryInterface(mLoadGroup);
if (p)
return p->GetPriority(aPriority);
*aPriority = 0;
return NS_OK;
}
NS_IMETHODIMP nsDocLoader::SetPriority(int32_t aPriority)
{
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: SetPriority(%d) called\n", this, aPriority));
nsCOMPtr<nsISupportsPriority> p = do_QueryInterface(mLoadGroup);
if (p)
p->SetPriority(aPriority);
NS_OBSERVER_ARRAY_NOTIFY_XPCOM_OBSERVERS(mChildList, nsDocLoader,
SetPriority, (aPriority));
return NS_OK;
}
NS_IMETHODIMP nsDocLoader::AdjustPriority(int32_t aDelta)
{
PR_LOG(gDocLoaderLog, PR_LOG_DEBUG,
("DocLoader:%p: AdjustPriority(%d) called\n", this, aDelta));
nsCOMPtr<nsISupportsPriority> p = do_QueryInterface(mLoadGroup);
if (p)
p->AdjustPriority(aDelta);
NS_OBSERVER_ARRAY_NOTIFY_XPCOM_OBSERVERS(mChildList, nsDocLoader,
AdjustPriority, (aDelta));
return NS_OK;
}
#if 0
void nsDocLoader::DumpChannelInfo()
{
nsChannelInfo *info;
int32_t i, count;
int32_t 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)
nsAutoCString 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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