chrome/browser/media/webrtc/media_stream_device_permission_context.cc

// 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/webrtc/media_stream_device_permission_context.h"
#include "chrome/browser/media/webrtc/media_stream_device_permissions.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/pref_names.h"
#include "components/content_settings/core/browser/host_content_settings_map.h"
#include "components/content_settings/core/common/content_settings.h"
#include "content/public/common/content_features.h"
#include "content/public/common/url_constants.h"
#include "extensions/common/constants.h"

namespace {

blink::FeaturePolicyFeature GetFeaturePolicyFeature(ContentSettingsType type) {
  if (type == CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC)
    return blink::FeaturePolicyFeature::kMicrophone;

  DCHECK_EQ(CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA, type);
  return blink::FeaturePolicyFeature::kCamera;
}

}  // namespace

MediaStreamDevicePermissionContext::MediaStreamDevicePermissionContext(
    Profile* profile,
    const ContentSettingsType content_settings_type)
    : PermissionContextBase(profile,
                            content_settings_type,
                            GetFeaturePolicyFeature(content_settings_type)),
      content_settings_type_(content_settings_type) {
  DCHECK(content_settings_type_ == CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC ||
         content_settings_type_ == CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA);
}

MediaStreamDevicePermissionContext::~MediaStreamDevicePermissionContext() {}

void MediaStreamDevicePermissionContext::DecidePermission(
    content::WebContents* web_contents,
    const PermissionRequestID& id,
    const GURL& requesting_origin,
    const GURL& embedding_origin,
    bool user_gesture,
    const BrowserPermissionCallback& callback) {
  PermissionContextBase::DecidePermission(web_contents, id, requesting_origin,
                                          embedding_origin, user_gesture,
                                          callback);
}

ContentSetting MediaStreamDevicePermissionContext::GetPermissionStatusInternal(
    content::RenderFrameHost* render_frame_host,
    const GURL& requesting_origin,
    const GURL& embedding_origin) const {
  // TODO(raymes): Merge this policy check into content settings
  // crbug.com/244389.
  const char* policy_name = nullptr;
  const char* urls_policy_name = nullptr;
  if (content_settings_type_ == CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC) {
    policy_name = prefs::kAudioCaptureAllowed;
    urls_policy_name = prefs::kAudioCaptureAllowedUrls;
  } else {
    DCHECK(content_settings_type_ == CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA);
    policy_name = prefs::kVideoCaptureAllowed;
    urls_policy_name = prefs::kVideoCaptureAllowedUrls;
  }

  MediaStreamDevicePolicy policy = GetDevicePolicy(
      profile(), requesting_origin, policy_name, urls_policy_name);

  switch (policy) {
    case ALWAYS_DENY:
      return CONTENT_SETTING_BLOCK;
    case ALWAYS_ALLOW:
      return CONTENT_SETTING_ALLOW;
    default:
      DCHECK_EQ(POLICY_NOT_SET, policy);
  }

  // Check the content setting. TODO(raymes): currently mic/camera permission
  // doesn't consider the embedder.
  ContentSetting setting = PermissionContextBase::GetPermissionStatusInternal(
      render_frame_host, requesting_origin, requesting_origin);

  if (setting == CONTENT_SETTING_DEFAULT)
    setting = CONTENT_SETTING_ASK;

  return setting;
}

void MediaStreamDevicePermissionContext::ResetPermission(
    const GURL& requesting_origin,
    const GURL& embedding_origin) {
  NOTREACHED() << "ResetPermission is not implemented";
}

bool MediaStreamDevicePermissionContext::IsRestrictedToSecureOrigins() const {
  return true;
}