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// Copyright 2016 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/desktop_session_duration/desktop_session_duration_observer.h"
#include "base/memory/ptr_util.h"
#include "chrome/browser/metrics/desktop_session_duration/desktop_session_duration_tracker.h"
#include "content/public/browser/render_view_host.h"
namespace metrics {
DesktopSessionDurationObserver::DesktopSessionDurationObserver(
content::WebContents* web_contents,
DesktopSessionDurationTracker* service)
: content::WebContentsObserver(web_contents),
content::WebContentsUserData<DesktopSessionDurationObserver>(
*web_contents),
service_(service) {
RegisterInputEventObserver(web_contents->GetPrimaryMainFrame());
}
DesktopSessionDurationObserver::~DesktopSessionDurationObserver() = default;
// static
DesktopSessionDurationObserver*
DesktopSessionDurationObserver::CreateForWebContents(
content::WebContents* web_contents) {
DCHECK(web_contents);
if (!DesktopSessionDurationTracker::IsInitialized())
return nullptr;
DesktopSessionDurationObserver* observer = FromWebContents(web_contents);
if (!observer) {
observer = new DesktopSessionDurationObserver(
web_contents, DesktopSessionDurationTracker::Get());
web_contents->SetUserData(UserDataKey(), base::WrapUnique(observer));
}
return observer;
}
void DesktopSessionDurationObserver::RegisterInputEventObserver(
content::RenderFrameHost* host) {
if (host != nullptr)
host->GetRenderWidgetHost()->AddInputEventObserver(this);
}
void DesktopSessionDurationObserver::UnregisterInputEventObserver(
content::RenderFrameHost* host) {
if (host != nullptr)
host->GetRenderWidgetHost()->RemoveInputEventObserver(this);
}
void DesktopSessionDurationObserver::OnInputEvent(
const content::RenderWidgetHost& widget,
const blink::WebInputEvent& event) {
service_->OnUserEvent();
}
void DesktopSessionDurationObserver::RenderFrameHostChanged(
content::RenderFrameHost* old_host,
content::RenderFrameHost* new_host) {
if (!new_host->IsInPrimaryMainFrame())
return;
UnregisterInputEventObserver(old_host);
RegisterInputEventObserver(new_host);
}
WEB_CONTENTS_USER_DATA_KEY_IMPL(DesktopSessionDurationObserver);
} // namespace metrics
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