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/*
* 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 "third_party/blink/renderer/core/loader/progress_tracker.h"
#include "third_party/blink/public/common/loader/loader_constants.h"
#include "third_party/blink/public/mojom/frame/frame.mojom-blink.h"
#include "third_party/blink/public/web/web_settings.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/local_frame_client.h"
#include "third_party/blink/renderer/core/frame/local_frame_view.h"
#include "third_party/blink/renderer/core/frame/settings.h"
#include "third_party/blink/renderer/core/loader/document_loader.h"
#include "third_party/blink/renderer/core/loader/frame_loader.h"
#include "third_party/blink/renderer/core/paint/timing/paint_timing.h"
#include "third_party/blink/renderer/core/probe/core_probes.h"
#include "third_party/blink/renderer/platform/loader/fetch/resource.h"
#include "third_party/blink/renderer/platform/loader/fetch/resource_fetcher.h"
#include "third_party/blink/renderer/platform/loader/fetch/resource_response.h"
namespace blink {
static constexpr int kProgressItemDefaultEstimatedLength = 1024 * 1024;
static constexpr double kProgressNotificationInterval = 0.02;
static constexpr double kProgressNotificationTimeInterval = 0.1;
ProgressTracker::ProgressTracker(LocalFrame* frame)
: frame_(frame),
last_notified_progress_value_(0),
last_notified_progress_time_(0),
finished_parsing_(false),
did_first_contentful_paint_(false),
progress_value_(0) {}
ProgressTracker::~ProgressTracker() = default;
void ProgressTracker::Trace(Visitor* visitor) const {
visitor->Trace(frame_);
}
void ProgressTracker::Dispose() {
if (frame_->IsLoading())
ProgressCompleted();
DCHECK(!frame_->IsLoading());
}
double ProgressTracker::EstimatedProgress() const {
return progress_value_;
}
void ProgressTracker::Reset() {
progress_items_.clear();
progress_value_ = 0;
last_notified_progress_value_ = 0;
last_notified_progress_time_ = 0;
finished_parsing_ = false;
did_first_contentful_paint_ = false;
bytes_received_ = 0;
estimated_bytes_for_pending_requests_ = 0;
}
LocalFrameClient* ProgressTracker::GetLocalFrameClient() const {
return frame_->Client();
}
void ProgressTracker::ProgressStarted() {
Reset();
progress_value_ = kInitialLoadProgress;
if (!frame_->IsLoading()) {
GetLocalFrameClient()->DidStartLoading();
frame_->SetIsLoading(true);
probe::FrameStartedLoading(frame_);
}
}
void ProgressTracker::ProgressCompleted() {
DCHECK(frame_->IsLoading());
frame_->SetIsLoading(false);
SendFinalProgress();
Reset();
probe::FrameStoppedLoading(frame_);
GetLocalFrameClient()->DidStopLoading();
frame_->UpdateFaviconURL();
}
void ProgressTracker::FinishedParsing() {
finished_parsing_ = true;
MaybeSendProgress();
}
void ProgressTracker::DidFirstContentfulPaint() {
did_first_contentful_paint_ = true;
MaybeSendProgress();
}
void ProgressTracker::SendFinalProgress() {
if (progress_value_ == 1)
return;
progress_value_ = 1;
frame_->GetLocalFrameHostRemote().DidChangeLoadProgress(progress_value_);
}
void ProgressTracker::WillStartLoading(uint64_t identifier,
ResourceLoadPriority priority) {
if (!frame_->IsLoading())
return;
if (HaveParsedAndPainted() || priority < ResourceLoadPriority::kHigh)
return;
ProgressItem new_item;
UpdateProgressItem(new_item, 0, kProgressItemDefaultEstimatedLength);
progress_items_.Set(identifier, new_item);
}
void ProgressTracker::IncrementProgress(uint64_t identifier,
const ResourceResponse& response) {
auto item = progress_items_.find(identifier);
if (item == progress_items_.end())
return;
int64_t estimated_length = response.ExpectedContentLength();
if (estimated_length < 0)
estimated_length = kProgressItemDefaultEstimatedLength;
UpdateProgressItem(item->value, 0, estimated_length);
}
void ProgressTracker::IncrementProgress(uint64_t identifier, uint64_t length) {
auto item = progress_items_.find(identifier);
if (item == progress_items_.end())
return;
ProgressItem& progress_item = item->value;
int64_t bytes_received = progress_item.bytes_received + length;
int64_t estimated_length = bytes_received > progress_item.estimated_length
? bytes_received * 2
: progress_item.estimated_length;
UpdateProgressItem(progress_item, bytes_received, estimated_length);
MaybeSendProgress();
}
bool ProgressTracker::HaveParsedAndPainted() {
return finished_parsing_ && did_first_contentful_paint_;
}
void ProgressTracker::UpdateProgressItem(ProgressItem& item,
int64_t bytes_received,
int64_t estimated_length) {
bytes_received_ += (bytes_received - item.bytes_received);
estimated_bytes_for_pending_requests_ +=
(estimated_length - item.estimated_length);
DCHECK_GE(bytes_received_, 0);
DCHECK_GE(estimated_bytes_for_pending_requests_, bytes_received_);
item.bytes_received = bytes_received;
item.estimated_length = estimated_length;
}
void ProgressTracker::MaybeSendProgress() {
if (!frame_->IsLoading())
return;
progress_value_ = kInitialLoadProgress + 0.1; // +0.1 for committing
if (finished_parsing_)
progress_value_ += 0.1;
if (did_first_contentful_paint_)
progress_value_ += 0.1;
if (HaveParsedAndPainted() &&
estimated_bytes_for_pending_requests_ == bytes_received_) {
SendFinalProgress();
return;
}
double percent_of_bytes_received =
!estimated_bytes_for_pending_requests_
? 1.0
: (double)bytes_received_ /
(double)estimated_bytes_for_pending_requests_;
progress_value_ += percent_of_bytes_received / 2;
DCHECK_GE(progress_value_, kInitialLoadProgress);
// Always leave space at the end. This helps show the user that we're not
// done until we're done.
DCHECK_LE(progress_value_, 0.9);
if (progress_value_ < last_notified_progress_value_)
return;
double now = base::Time::Now().InSecondsFSinceUnixEpoch();
double notified_progress_time_delta = now - last_notified_progress_time_;
double notification_progress_delta =
progress_value_ - last_notified_progress_value_;
if (notification_progress_delta >= kProgressNotificationInterval ||
notified_progress_time_delta >= kProgressNotificationTimeInterval) {
frame_->GetLocalFrameHostRemote().DidChangeLoadProgress(progress_value_);
last_notified_progress_value_ = progress_value_;
last_notified_progress_time_ = now;
}
}
void ProgressTracker::CompleteProgress(uint64_t identifier) {
auto item = progress_items_.find(identifier);
if (item == progress_items_.end())
return;
ProgressItem& progress_item = item->value;
UpdateProgressItem(item->value, progress_item.bytes_received,
progress_item.bytes_received);
MaybeSendProgress();
}
} // namespace blink
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