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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/metrics/first_web_contents_profiler_base.h"
#include "build/build_config.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/web_contents_observer.h"
namespace metrics {
FirstWebContentsProfilerBase::FirstWebContentsProfilerBase(
content::WebContents* web_contents)
: content::WebContentsObserver(web_contents) {}
FirstWebContentsProfilerBase::~FirstWebContentsProfilerBase() = default;
// static
content::WebContents* FirstWebContentsProfilerBase::GetVisibleContents(
Browser* browser) {
if (!browser->window()->IsVisible())
return nullptr;
// The active WebContents may be hidden when the window height is small.
content::WebContents* contents =
browser->tab_strip_model()->GetActiveWebContents();
// It is incorrect to have a visible browser window with no active
// WebContents, but reports on show that it happens.
// See https://crbug.com/1032348 for Mac or https://crbug.com/1414831 for Win.
if (!contents)
return nullptr;
if (contents->GetVisibility() != content::Visibility::VISIBLE)
return nullptr;
return contents;
}
void FirstWebContentsProfilerBase::DidStartNavigation(
content::NavigationHandle* navigation_handle) {
// The profiler is concerned with the primary main frame navigation only.
if (!navigation_handle->IsInPrimaryMainFrame() ||
navigation_handle->IsSameDocument()) {
return;
}
// The profiler is created after DidStartNavigation() has been dispatched for
// the first top-level navigation. If another DidStartNavigation() is
// received, it means that a new navigation was initiated.
FinishedCollectingMetrics(
StartupProfilingFinishReason::kAbandonNewNavigation);
}
void FirstWebContentsProfilerBase::DidFinishNavigation(
content::NavigationHandle* navigation_handle) {
if (WasStartupInterrupted()) {
FinishedCollectingMetrics(StartupProfilingFinishReason::kAbandonBlockingUI);
return;
}
// Ignore subframe navigations, pre-rendering, and same-document navigations.
if (!navigation_handle->IsInPrimaryMainFrame() ||
navigation_handle->IsSameDocument()) {
return;
}
if (!navigation_handle->HasCommitted() || navigation_handle->IsErrorPage()) {
FinishedCollectingMetrics(
StartupProfilingFinishReason::kAbandonNavigationError);
return;
}
// It is not possible to get a second top-level DidFinishNavigation() without
// first having a DidStartNavigation(), which would have deleted |this|.
DCHECK(!did_finish_first_navigation_);
did_finish_first_navigation_ = true;
RecordNavigationFinished(navigation_handle->NavigationStart());
}
void FirstWebContentsProfilerBase::DidFirstVisuallyNonEmptyPaint() {
DCHECK(did_finish_first_navigation_);
if (WasStartupInterrupted()) {
FinishedCollectingMetrics(StartupProfilingFinishReason::kAbandonBlockingUI);
return;
}
RecordFirstNonEmptyPaint();
FinishedCollectingMetrics(StartupProfilingFinishReason::kDone);
}
void FirstWebContentsProfilerBase::OnVisibilityChanged(
content::Visibility visibility) {
if (visibility != content::Visibility::VISIBLE) {
// Stop profiling if the content gets hidden as its load may be
// deprioritized and timing it becomes meaningless.
FinishedCollectingMetrics(
StartupProfilingFinishReason::kAbandonContentHidden);
}
}
void FirstWebContentsProfilerBase::WebContentsDestroyed() {
FinishedCollectingMetrics(
StartupProfilingFinishReason::kAbandonContentDestroyed);
}
void FirstWebContentsProfilerBase::FinishedCollectingMetrics(
StartupProfilingFinishReason finish_reason) {
RecordFinishReason(finish_reason);
delete this;
}
} // namespace metrics
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