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// Copyright 2018 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/apps/platform_apps/audio_focus_web_contents_observer.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/media_session.h"
#include "content/public/browser/navigation_handle.h"
#include "extensions/browser/extension_host.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/browser/process_manager.h"
#include "extensions/common/extension.h"
namespace apps {
AudioFocusWebContentsObserver::AudioFocusWebContentsObserver(
content::WebContents* web_contents)
: content::WebContentsObserver(web_contents),
content::WebContentsUserData<AudioFocusWebContentsObserver>(
*web_contents) {}
AudioFocusWebContentsObserver::~AudioFocusWebContentsObserver() = default;
void AudioFocusWebContentsObserver::PrimaryPageChanged(content::Page& page) {
content::RenderFrameHost& render_frame_host = page.GetMainDocument();
if (render_frame_host.IsErrorDocument())
return;
if (!audio_focus_group_id_.is_empty())
return;
content::BrowserContext* context = render_frame_host.GetBrowserContext();
const extensions::Extension* extension =
extensions::ExtensionRegistry::Get(context)
->enabled_extensions()
.GetExtensionOrAppByURL(render_frame_host.GetLastCommittedURL());
if (!extension || !extension->is_platform_app())
return;
extensions::ProcessManager* pm = extensions::ProcessManager::Get(context);
extensions::ExtensionHost* host =
pm->GetBackgroundHostForExtension(extension->id());
if (!host || !host->host_contents())
return;
// If we are the background contents then we will generate a group id.
// Otherwise, we will use the group id from the background contents. This
// means that all web contents for an app will have the same group id. This
// will only be done once for a given web contents and expects it to not
// change platform app during its lifetime.
if (host->host_contents() == web_contents()) {
audio_focus_group_id_ = base::UnguessableToken::Create();
} else {
AudioFocusWebContentsObserver* observer =
AudioFocusWebContentsObserver::FromWebContents(host->host_contents());
DCHECK(observer);
audio_focus_group_id_ = observer->audio_focus_group_id_;
}
content::MediaSession::Get(web_contents())
->SetAudioFocusGroupId(audio_focus_group_id_);
}
WEB_CONTENTS_USER_DATA_KEY_IMPL(AudioFocusWebContentsObserver);
} // namespace apps
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