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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/media/permission_bubble_media_access_handler.h"
#include "base/metrics/field_trial.h"
#include "chrome/browser/media/media_permission.h"
#include "chrome/browser/media/media_stream_device_permissions.h"
#include "chrome/browser/media/media_stream_infobar_delegate.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/website_settings/permission_bubble_manager.h"
#include "chrome/common/pref_names.h"
#include "components/content_settings/core/browser/host_content_settings_map.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/web_contents.h"
using content::BrowserThread;
struct PermissionBubbleMediaAccessHandler::PendingAccessRequest {
PendingAccessRequest(const content::MediaStreamRequest& request,
const content::MediaResponseCallback& callback)
: request(request), callback(callback) {}
~PendingAccessRequest() {}
// TODO(gbillock): make the MediaStreamDevicesController owned by
// this object when we're using bubbles.
content::MediaStreamRequest request;
content::MediaResponseCallback callback;
};
PermissionBubbleMediaAccessHandler::PermissionBubbleMediaAccessHandler() {
// PermissionBubbleMediaAccessHandler should be created on UI thread.
// Otherwise, it will not receive
// content::NOTIFICATION_WEB_CONTENTS_DESTROYED, and that will result in
// possible use after free.
DCHECK_CURRENTLY_ON(BrowserThread::UI);
notifications_registrar_.Add(this,
content::NOTIFICATION_WEB_CONTENTS_DESTROYED,
content::NotificationService::AllSources());
}
PermissionBubbleMediaAccessHandler::~PermissionBubbleMediaAccessHandler() {
}
bool PermissionBubbleMediaAccessHandler::SupportsStreamType(
const content::MediaStreamType type,
const extensions::Extension* extension) {
return type == content::MEDIA_DEVICE_VIDEO_CAPTURE ||
type == content::MEDIA_DEVICE_AUDIO_CAPTURE;
}
bool PermissionBubbleMediaAccessHandler::CheckMediaAccessPermission(
content::WebContents* web_contents,
const GURL& security_origin,
content::MediaStreamType type,
const extensions::Extension* extension) {
Profile* profile =
Profile::FromBrowserContext(web_contents->GetBrowserContext());
ContentSettingsType content_settings_type =
type == content::MEDIA_DEVICE_AUDIO_CAPTURE
? CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC
: CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA;
MediaPermission permission(
content_settings_type, content::MEDIA_DEVICE_ACCESS, security_origin,
web_contents->GetLastCommittedURL().GetOrigin(), profile);
content::MediaStreamRequestResult unused;
if (permission.GetPermissionStatus(&unused) == CONTENT_SETTING_ALLOW)
return true;
return false;
}
void PermissionBubbleMediaAccessHandler::HandleRequest(
content::WebContents* web_contents,
const content::MediaStreamRequest& request,
const content::MediaResponseCallback& callback,
const extensions::Extension* extension) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
RequestsQueue& queue = pending_requests_[web_contents];
queue.push_back(PendingAccessRequest(request, callback));
// If this is the only request then show the infobar.
if (queue.size() == 1)
ProcessQueuedAccessRequest(web_contents);
}
void PermissionBubbleMediaAccessHandler::ProcessQueuedAccessRequest(
content::WebContents* web_contents) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
std::map<content::WebContents*, RequestsQueue>::iterator it =
pending_requests_.find(web_contents);
if (it == pending_requests_.end() || it->second.empty()) {
// Don't do anything if the tab was closed.
return;
}
DCHECK(!it->second.empty());
if (PermissionBubbleManager::Enabled()) {
scoped_ptr<MediaStreamDevicesController> controller(
new MediaStreamDevicesController(
web_contents, it->second.front().request,
base::Bind(
&PermissionBubbleMediaAccessHandler::OnAccessRequestResponse,
base::Unretained(this), web_contents)));
if (!controller->IsAskingForAudio() && !controller->IsAskingForVideo())
return;
PermissionBubbleManager* bubble_manager =
PermissionBubbleManager::FromWebContents(web_contents);
if (bubble_manager)
bubble_manager->AddRequest(controller.release());
return;
}
// TODO(gbillock): delete this block and the MediaStreamInfoBarDelegate
// when we've transitioned to bubbles. (crbug/337458)
MediaStreamInfoBarDelegate::Create(
web_contents, it->second.front().request,
base::Bind(&PermissionBubbleMediaAccessHandler::OnAccessRequestResponse,
base::Unretained(this), web_contents));
}
void PermissionBubbleMediaAccessHandler::UpdateMediaRequestState(
int render_process_id,
int render_frame_id,
int page_request_id,
content::MediaStreamType stream_type,
content::MediaRequestState state) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (state != content::MEDIA_REQUEST_STATE_CLOSING)
return;
bool found = false;
for (RequestsQueues::iterator rqs_it = pending_requests_.begin();
rqs_it != pending_requests_.end(); ++rqs_it) {
RequestsQueue& queue = rqs_it->second;
for (RequestsQueue::iterator it = queue.begin(); it != queue.end(); ++it) {
if (it->request.render_process_id == render_process_id &&
it->request.render_frame_id == render_frame_id &&
it->request.page_request_id == page_request_id) {
queue.erase(it);
found = true;
break;
}
}
if (found)
break;
}
}
void PermissionBubbleMediaAccessHandler::OnAccessRequestResponse(
content::WebContents* web_contents,
const content::MediaStreamDevices& devices,
content::MediaStreamRequestResult result,
scoped_ptr<content::MediaStreamUI> ui) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
std::map<content::WebContents*, RequestsQueue>::iterator it =
pending_requests_.find(web_contents);
if (it == pending_requests_.end()) {
// WebContents has been destroyed. Don't need to do anything.
return;
}
RequestsQueue& queue(it->second);
if (queue.empty())
return;
content::MediaResponseCallback callback = queue.front().callback;
queue.pop_front();
if (!queue.empty()) {
// Post a task to process next queued request. It has to be done
// asynchronously to make sure that calling infobar is not destroyed until
// after this function returns.
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(
&PermissionBubbleMediaAccessHandler::ProcessQueuedAccessRequest,
base::Unretained(this), web_contents));
}
callback.Run(devices, result, ui.Pass());
}
void PermissionBubbleMediaAccessHandler::Observe(
int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (type == content::NOTIFICATION_WEB_CONTENTS_DESTROYED) {
content::WebContents* web_contents =
content::Source<content::WebContents>(source).ptr();
pending_requests_.erase(web_contents);
}
}
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