Source/WebCore/loader/ProgressTracker.cpp - external/Webkit - Git at Google

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "config.h"
 #include "ProgressTracker.h"

 #include "DocumentLoader.h"
 #include "Frame.h"
 #include "FrameLoader.h"
 #include "FrameLoaderStateMachine.h"
 #include "FrameLoaderClient.h"
 #include "InspectorInstrumentation.h"
 #include "Logging.h"
 #include "ResourceResponse.h"
 #include <wtf/text/CString.h>
 #include <wtf/CurrentTime.h>

 using std::min;

 namespace WebCore {

 // Always start progress at initialProgressValue. This helps provide feedback as
 // soon as a load starts.
 static const double initialProgressValue = 0.1;

 // Similarly, always leave space at the end. This helps show the user that we're not done
 // until we're done.
 static const double finalProgressValue = 0.9; // 1.0 - initialProgressValue

 static const int progressItemDefaultEstimatedLength = 1024 * 16;

 // Check if the load is progressing this often.
 static const double progressHeartbeatInterval = 0.1;
 // How many heartbeats must pass without progress before deciding the load is currently stalled.
 static const unsigned loadStalledHeartbeatCount = 4;
 // How many bytes are required between heartbeats to consider it progress.
 static const unsigned minumumBytesPerHeartbeatForProgress = 1024;

 struct ProgressItem {
     WTF_MAKE_NONCOPYABLE(ProgressItem); WTF_MAKE_FAST_ALLOCATED;
 public:
     ProgressItem(long long length)
         : bytesReceived(0)
         , estimatedLength(length) { }

     long long bytesReceived;
     long long estimatedLength;
 };

 unsigned long ProgressTracker::s_uniqueIdentifier = 0;

 ProgressTracker::ProgressTracker()
     : m_totalPageAndResourceBytesToLoad(0)
     , m_totalBytesReceived(0)
     , m_lastNotifiedProgressValue(0)
     , m_lastNotifiedProgressTime(0)
     , m_progressNotificationInterval(0.02)
     , m_progressNotificationTimeInterval(0.1)
     , m_finalProgressChangedSent(false)
     , m_progressValue(0)
     , m_numProgressTrackedFrames(0)
     , m_progressHeartbeatTimer(this, &ProgressTracker::progressHeartbeatTimerFired)
     , m_heartbeatsWithNoProgress(0)
     , m_totalBytesReceivedBeforePreviousHeartbeat(0)
 {
 }

 ProgressTracker::~ProgressTracker()
 {
 }

 PassOwnPtr<ProgressTracker> ProgressTracker::create()
 {
     return adoptPtr(new ProgressTracker);
 }

 double ProgressTracker::estimatedProgress() const
 {
     return m_progressValue;
 }

 void ProgressTracker::reset()
 {
     m_progressItems.clear();

     m_totalPageAndResourceBytesToLoad = 0;
     m_totalBytesReceived = 0;
     m_progressValue = 0;
     m_lastNotifiedProgressValue = 0;
     m_lastNotifiedProgressTime = 0;
     m_finalProgressChangedSent = false;
     m_numProgressTrackedFrames = 0;
     m_originatingProgressFrame = 0;

     m_heartbeatsWithNoProgress = 0;
     m_totalBytesReceivedBeforePreviousHeartbeat = 0;
     m_progressHeartbeatTimer.stop();
 }

 void ProgressTracker::progressStarted(Frame* frame)
 {
     LOG(Progress, "Progress started (%p) - frame %p(\"%s\"), value %f, tracked frames %d, originating frame %p", this, frame, frame->tree()->uniqueName().string().utf8().data(), m_progressValue, m_numProgressTrackedFrames, m_originatingProgressFrame.get());

     frame->loader()->client()->willChangeEstimatedProgress();

     if (m_numProgressTrackedFrames == 0 || m_originatingProgressFrame == frame) {
         reset();
         m_progressValue = initialProgressValue;
         m_originatingProgressFrame = frame;

         m_progressHeartbeatTimer.startRepeating(progressHeartbeatInterval);
         m_originatingProgressFrame->loader()->loadProgressingStatusChanged();

         m_originatingProgressFrame->loader()->client()->postProgressStartedNotification();
     }
     m_numProgressTrackedFrames++;

     frame->loader()->client()->didChangeEstimatedProgress();
     InspectorInstrumentation::frameStartedLoading(frame);
 }

 void ProgressTracker::progressCompleted(Frame* frame)
 {
     LOG(Progress, "Progress completed (%p) - frame %p(\"%s\"), value %f, tracked frames %d, originating frame %p", this, frame, frame->tree()->uniqueName().string().utf8().data(), m_progressValue, m_numProgressTrackedFrames, m_originatingProgressFrame.get());

     if (m_numProgressTrackedFrames <= 0)
         return;

     frame->loader()->client()->willChangeEstimatedProgress();

     m_numProgressTrackedFrames--;
     if (!m_numProgressTrackedFrames || m_originatingProgressFrame == frame)
         finalProgressComplete();

     frame->loader()->client()->didChangeEstimatedProgress();
 }

 void ProgressTracker::finalProgressComplete()
 {
     LOG(Progress, "Final progress complete (%p)", this);

     RefPtr<Frame> frame = m_originatingProgressFrame.release();

     // Before resetting progress value be sure to send client a least one notification
     // with final progress value.
     if (!m_finalProgressChangedSent) {
         m_progressValue = 1;
         frame->loader()->client()->postProgressEstimateChangedNotification();
     }

     reset();

     frame->loader()->client()->setMainFrameDocumentReady(true);
     frame->loader()->client()->postProgressFinishedNotification();
     frame->loader()->loadProgressingStatusChanged();

     InspectorInstrumentation::frameStoppedLoading(frame.get());
 }

 void ProgressTracker::incrementProgress(unsigned long identifier, const ResourceResponse& response)
 {
     LOG(Progress, "Progress incremented (%p) - value %f, tracked frames %d, originating frame %p", this, m_progressValue, m_numProgressTrackedFrames, m_originatingProgressFrame.get());

     if (m_numProgressTrackedFrames <= 0)
         return;

     long long estimatedLength = response.expectedContentLength();
     if (estimatedLength < 0)
         estimatedLength = progressItemDefaultEstimatedLength;

     m_totalPageAndResourceBytesToLoad += estimatedLength;

     if (ProgressItem* item = m_progressItems.get(identifier)) {
         item->bytesReceived = 0;
         item->estimatedLength = estimatedLength;
     } else
         m_progressItems.set(identifier, adoptPtr(new ProgressItem(estimatedLength)));
 }

 void ProgressTracker::incrementProgress(unsigned long identifier, const char*, int length)
 {
     ProgressItem* item = m_progressItems.get(identifier);

     // FIXME: Can this ever happen?
     if (!item)
         return;

     RefPtr<Frame> frame = m_originatingProgressFrame;

     frame->loader()->client()->willChangeEstimatedProgress();

     unsigned bytesReceived = length;
     double increment, percentOfRemainingBytes;
     long long remainingBytes, estimatedBytesForPendingRequests;

     item->bytesReceived += bytesReceived;
     if (item->bytesReceived > item->estimatedLength) {
         m_totalPageAndResourceBytesToLoad += ((item->bytesReceived * 2) - item->estimatedLength);
         item->estimatedLength = item->bytesReceived * 2;
     }

     int numPendingOrLoadingRequests = frame->loader()->numPendingOrLoadingRequests(true);
     estimatedBytesForPendingRequests = progressItemDefaultEstimatedLength * numPendingOrLoadingRequests;
     remainingBytes = ((m_totalPageAndResourceBytesToLoad + estimatedBytesForPendingRequests) - m_totalBytesReceived);
     if (remainingBytes > 0)  // Prevent divide by 0.
         percentOfRemainingBytes = (double)bytesReceived / (double)remainingBytes;
     else
         percentOfRemainingBytes = 1.0;

     // For documents that use WebCore's layout system, treat first layout as the half-way point.
     // FIXME: The hasHTMLView function is a sort of roundabout way of asking "do you use WebCore's layout system".
     bool useClampedMaxProgress = frame->loader()->client()->hasHTMLView()
         && !frame->loader()->stateMachine()->firstLayoutDone();
     double maxProgressValue = useClampedMaxProgress ? 0.5 : finalProgressValue;
     increment = (maxProgressValue - m_progressValue) * percentOfRemainingBytes;
     m_progressValue += increment;
     m_progressValue = min(m_progressValue, maxProgressValue);
     ASSERT(m_progressValue >= initialProgressValue);

     m_totalBytesReceived += bytesReceived;

     double now = currentTime();
     double notifiedProgressTimeDelta = now - m_lastNotifiedProgressTime;

     LOG(Progress, "Progress incremented (%p) - value %f, tracked frames %d", this, m_progressValue, m_numProgressTrackedFrames);
     double notificationProgressDelta = m_progressValue - m_lastNotifiedProgressValue;
     if ((notificationProgressDelta >= m_progressNotificationInterval ||
          notifiedProgressTimeDelta >= m_progressNotificationTimeInterval) &&
         m_numProgressTrackedFrames > 0) {
         if (!m_finalProgressChangedSent) {
             if (m_progressValue == 1)
                 m_finalProgressChangedSent = true;

             frame->loader()->client()->postProgressEstimateChangedNotification();

             m_lastNotifiedProgressValue = m_progressValue;
             m_lastNotifiedProgressTime = now;
         }
     }

     frame->loader()->client()->didChangeEstimatedProgress();
 }

 void ProgressTracker::completeProgress(unsigned long identifier)
 {
     ProgressItem* item = m_progressItems.get(identifier);

     // This can happen if a load fails without receiving any response data.
     if (!item)
         return;

     // Adjust the total expected bytes to account for any overage/underage.
     long long delta = item->bytesReceived - item->estimatedLength;
     m_totalPageAndResourceBytesToLoad += delta;

     m_progressItems.remove(identifier);
 }

 unsigned long ProgressTracker::createUniqueIdentifier()
 {
     return ++s_uniqueIdentifier;
 }

 bool ProgressTracker::isMainLoadProgressing() const
 {
     if (!m_originatingProgressFrame)
         return false;
     // See if the load originated from a subframe.
     if (m_originatingProgressFrame->tree()->parent())
         return false;
     return m_progressValue && m_progressValue < finalProgressValue && m_heartbeatsWithNoProgress < loadStalledHeartbeatCount;
 }

 void ProgressTracker::progressHeartbeatTimerFired(Timer<ProgressTracker>*)
 {
     if (m_totalBytesReceived < m_totalBytesReceivedBeforePreviousHeartbeat + minumumBytesPerHeartbeatForProgress)
         ++m_heartbeatsWithNoProgress;
     else
         m_heartbeatsWithNoProgress = 0;

     m_totalBytesReceivedBeforePreviousHeartbeat = m_totalBytesReceived;

     m_originatingProgressFrame->loader()->loadProgressingStatusChanged();

     if (m_progressValue >= finalProgressValue)
         m_progressHeartbeatTimer.stop();
 }

 }
	/*
	* Copyright (C) 2007 Apple Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "config.h"
	#include "ProgressTracker.h"

	#include "DocumentLoader.h"
	#include "Frame.h"
	#include "FrameLoader.h"
	#include "FrameLoaderStateMachine.h"
	#include "FrameLoaderClient.h"
	#include "InspectorInstrumentation.h"
	#include "Logging.h"
	#include "ResourceResponse.h"
	#include <wtf/text/CString.h>
	#include <wtf/CurrentTime.h>

	using std::min;

	namespace WebCore {

	// Always start progress at initialProgressValue. This helps provide feedback as
	// soon as a load starts.
	static const double initialProgressValue = 0.1;

	// Similarly, always leave space at the end. This helps show the user that we're not done
	// until we're done.
	static const double finalProgressValue = 0.9; // 1.0 - initialProgressValue

	static const int progressItemDefaultEstimatedLength = 1024 * 16;

	// Check if the load is progressing this often.
	static const double progressHeartbeatInterval = 0.1;
	// How many heartbeats must pass without progress before deciding the load is currently stalled.
	static const unsigned loadStalledHeartbeatCount = 4;
	// How many bytes are required between heartbeats to consider it progress.
	static const unsigned minumumBytesPerHeartbeatForProgress = 1024;

	struct ProgressItem {
	WTF_MAKE_NONCOPYABLE(ProgressItem); WTF_MAKE_FAST_ALLOCATED;
	public:
	ProgressItem(long long length)
	: bytesReceived(0)
	, estimatedLength(length) { }

	long long bytesReceived;
	long long estimatedLength;
	};

	unsigned long ProgressTracker::s_uniqueIdentifier = 0;

	ProgressTracker::ProgressTracker()
	: m_totalPageAndResourceBytesToLoad(0)
	, m_totalBytesReceived(0)
	, m_lastNotifiedProgressValue(0)
	, m_lastNotifiedProgressTime(0)
	, m_progressNotificationInterval(0.02)
	, m_progressNotificationTimeInterval(0.1)
	, m_finalProgressChangedSent(false)
	, m_progressValue(0)
	, m_numProgressTrackedFrames(0)
	, m_progressHeartbeatTimer(this, &ProgressTracker::progressHeartbeatTimerFired)
	, m_heartbeatsWithNoProgress(0)
	, m_totalBytesReceivedBeforePreviousHeartbeat(0)
	{
	}

	ProgressTracker::~ProgressTracker()
	{
	}

	PassOwnPtr<ProgressTracker> ProgressTracker::create()
	{
	return adoptPtr(new ProgressTracker);
	}

	double ProgressTracker::estimatedProgress() const
	{
	return m_progressValue;
	}

	void ProgressTracker::reset()
	{
	m_progressItems.clear();

	m_totalPageAndResourceBytesToLoad = 0;
	m_totalBytesReceived = 0;
	m_progressValue = 0;
	m_lastNotifiedProgressValue = 0;
	m_lastNotifiedProgressTime = 0;
	m_finalProgressChangedSent = false;
	m_numProgressTrackedFrames = 0;
	m_originatingProgressFrame = 0;

	m_heartbeatsWithNoProgress = 0;
	m_totalBytesReceivedBeforePreviousHeartbeat = 0;
	m_progressHeartbeatTimer.stop();
	}

	void ProgressTracker::progressStarted(Frame* frame)
	{
	LOG(Progress, "Progress started (%p) - frame %p(\"%s\"), value %f, tracked frames %d, originating frame %p", this, frame, frame->tree()->uniqueName().string().utf8().data(), m_progressValue, m_numProgressTrackedFrames, m_originatingProgressFrame.get());

	frame->loader()->client()->willChangeEstimatedProgress();

	if (m_numProgressTrackedFrames == 0 \|\| m_originatingProgressFrame == frame) {
	reset();
	m_progressValue = initialProgressValue;
	m_originatingProgressFrame = frame;

	m_progressHeartbeatTimer.startRepeating(progressHeartbeatInterval);
	m_originatingProgressFrame->loader()->loadProgressingStatusChanged();

	m_originatingProgressFrame->loader()->client()->postProgressStartedNotification();
	}
	m_numProgressTrackedFrames++;

	frame->loader()->client()->didChangeEstimatedProgress();
	InspectorInstrumentation::frameStartedLoading(frame);
	}

	void ProgressTracker::progressCompleted(Frame* frame)
	{
	LOG(Progress, "Progress completed (%p) - frame %p(\"%s\"), value %f, tracked frames %d, originating frame %p", this, frame, frame->tree()->uniqueName().string().utf8().data(), m_progressValue, m_numProgressTrackedFrames, m_originatingProgressFrame.get());

	if (m_numProgressTrackedFrames <= 0)
	return;

	frame->loader()->client()->willChangeEstimatedProgress();

	m_numProgressTrackedFrames--;
	if (!m_numProgressTrackedFrames \|\| m_originatingProgressFrame == frame)
	finalProgressComplete();

	frame->loader()->client()->didChangeEstimatedProgress();
	}

	void ProgressTracker::finalProgressComplete()
	{
	LOG(Progress, "Final progress complete (%p)", this);

	RefPtr<Frame> frame = m_originatingProgressFrame.release();

	// Before resetting progress value be sure to send client a least one notification
	// with final progress value.
	if (!m_finalProgressChangedSent) {
	m_progressValue = 1;
	frame->loader()->client()->postProgressEstimateChangedNotification();
	}

	reset();

	frame->loader()->client()->setMainFrameDocumentReady(true);
	frame->loader()->client()->postProgressFinishedNotification();
	frame->loader()->loadProgressingStatusChanged();

	InspectorInstrumentation::frameStoppedLoading(frame.get());
	}

	void ProgressTracker::incrementProgress(unsigned long identifier, const ResourceResponse& response)
	{
	LOG(Progress, "Progress incremented (%p) - value %f, tracked frames %d, originating frame %p", this, m_progressValue, m_numProgressTrackedFrames, m_originatingProgressFrame.get());

	if (m_numProgressTrackedFrames <= 0)
	return;

	long long estimatedLength = response.expectedContentLength();
	if (estimatedLength < 0)
	estimatedLength = progressItemDefaultEstimatedLength;

	m_totalPageAndResourceBytesToLoad += estimatedLength;

	if (ProgressItem* item = m_progressItems.get(identifier)) {
	item->bytesReceived = 0;
	item->estimatedLength = estimatedLength;
	} else
	m_progressItems.set(identifier, adoptPtr(new ProgressItem(estimatedLength)));
	}

	void ProgressTracker::incrementProgress(unsigned long identifier, const char*, int length)
	{
	ProgressItem* item = m_progressItems.get(identifier);

	// FIXME: Can this ever happen?
	if (!item)
	return;

	RefPtr<Frame> frame = m_originatingProgressFrame;

	frame->loader()->client()->willChangeEstimatedProgress();

	unsigned bytesReceived = length;
	double increment, percentOfRemainingBytes;
	long long remainingBytes, estimatedBytesForPendingRequests;

	item->bytesReceived += bytesReceived;
	if (item->bytesReceived > item->estimatedLength) {
	m_totalPageAndResourceBytesToLoad += ((item->bytesReceived * 2) - item->estimatedLength);
	item->estimatedLength = item->bytesReceived * 2;
	}

	int numPendingOrLoadingRequests = frame->loader()->numPendingOrLoadingRequests(true);
	estimatedBytesForPendingRequests = progressItemDefaultEstimatedLength * numPendingOrLoadingRequests;
	remainingBytes = ((m_totalPageAndResourceBytesToLoad + estimatedBytesForPendingRequests) - m_totalBytesReceived);
	if (remainingBytes > 0) // Prevent divide by 0.
	percentOfRemainingBytes = (double)bytesReceived / (double)remainingBytes;
	else
	percentOfRemainingBytes = 1.0;

	// For documents that use WebCore's layout system, treat first layout as the half-way point.
	// FIXME: The hasHTMLView function is a sort of roundabout way of asking "do you use WebCore's layout system".
	bool useClampedMaxProgress = frame->loader()->client()->hasHTMLView()
	&& !frame->loader()->stateMachine()->firstLayoutDone();
	double maxProgressValue = useClampedMaxProgress ? 0.5 : finalProgressValue;
	increment = (maxProgressValue - m_progressValue) * percentOfRemainingBytes;
	m_progressValue += increment;
	m_progressValue = min(m_progressValue, maxProgressValue);
	ASSERT(m_progressValue >= initialProgressValue);

	m_totalBytesReceived += bytesReceived;

	double now = currentTime();
	double notifiedProgressTimeDelta = now - m_lastNotifiedProgressTime;

	LOG(Progress, "Progress incremented (%p) - value %f, tracked frames %d", this, m_progressValue, m_numProgressTrackedFrames);
	double notificationProgressDelta = m_progressValue - m_lastNotifiedProgressValue;
	if ((notificationProgressDelta >= m_progressNotificationInterval \|\|
	notifiedProgressTimeDelta >= m_progressNotificationTimeInterval) &&
	m_numProgressTrackedFrames > 0) {
	if (!m_finalProgressChangedSent) {
	if (m_progressValue == 1)
	m_finalProgressChangedSent = true;

	frame->loader()->client()->postProgressEstimateChangedNotification();

	m_lastNotifiedProgressValue = m_progressValue;
	m_lastNotifiedProgressTime = now;
	}
	}

	frame->loader()->client()->didChangeEstimatedProgress();
	}

	void ProgressTracker::completeProgress(unsigned long identifier)
	{
	ProgressItem* item = m_progressItems.get(identifier);

	// This can happen if a load fails without receiving any response data.
	if (!item)
	return;

	// Adjust the total expected bytes to account for any overage/underage.
	long long delta = item->bytesReceived - item->estimatedLength;
	m_totalPageAndResourceBytesToLoad += delta;

	m_progressItems.remove(identifier);
	}

	unsigned long ProgressTracker::createUniqueIdentifier()
	{
	return ++s_uniqueIdentifier;
	}

	bool ProgressTracker::isMainLoadProgressing() const
	{
	if (!m_originatingProgressFrame)
	return false;
	// See if the load originated from a subframe.
	if (m_originatingProgressFrame->tree()->parent())
	return false;
	return m_progressValue && m_progressValue < finalProgressValue && m_heartbeatsWithNoProgress < loadStalledHeartbeatCount;
	}

	void ProgressTracker::progressHeartbeatTimerFired(Timer<ProgressTracker>*)
	{
	if (m_totalBytesReceived < m_totalBytesReceivedBeforePreviousHeartbeat + minumumBytesPerHeartbeatForProgress)
	++m_heartbeatsWithNoProgress;
	else
	m_heartbeatsWithNoProgress = 0;

	m_totalBytesReceivedBeforePreviousHeartbeat = m_totalBytesReceived;

	m_originatingProgressFrame->loader()->loadProgressingStatusChanged();

	if (m_progressValue >= finalProgressValue)
	m_progressHeartbeatTimer.stop();
	}

	}