chrome/browser/android/voice_search_tab_helper.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/android/voice_search_tab_helper.h"
   6
   7 #include "base/command_line.h"
   8 #include "components/google/core/browser/google_util.h"
   9 #include "content/public/browser/render_view_host.h"
  10 #include "content/public/browser/web_contents.h"
  11 #include "content/public/common/content_switches.h"
  12 #include "content/public/common/web_preferences.h"
  13
  14 DEFINE_WEB_CONTENTS_USER_DATA_KEY(VoiceSearchTabHelper);
  15
  16 VoiceSearchTabHelper::VoiceSearchTabHelper(content::WebContents* contents)
  17     : content::WebContentsObserver(contents) {
  18   gesture_requirement_for_playback_disabled_ =
  19       base::CommandLine::ForCurrentProcess()->HasSwitch(
  20           switches::kDisableGestureRequirementForMediaPlayback);
  21 }
  22
  23 VoiceSearchTabHelper::~VoiceSearchTabHelper() {
  24 }
  25
  26 void VoiceSearchTabHelper::NavigationEntryCommitted(
  27     const content::LoadCommittedDetails& load_details) {
  28   // In the case where media autoplay has been disabled by default (e.g. in
  29   // performance media tests) do not update it based on navigation changes.
  30   if (gesture_requirement_for_playback_disabled_)
  31     return;
  32
  33   content::RenderViewHost* host = web_contents()->GetRenderViewHost();
  34   content::WebPreferences prefs = host->GetWebkitPreferences();
  35
  36   bool gesture_required =
  37       !google_util::IsGoogleSearchUrl(web_contents()->GetLastCommittedURL());
  38
  39   if (gesture_required != prefs.user_gesture_required_for_media_playback) {
  40     // TODO(chrishtr): this is wrong. user_gesture_required_for_media_playback
  41     // will be reset the next time a preference changes.
  42     prefs.user_gesture_required_for_media_playback = gesture_required;
  43     host->UpdateWebkitPreferences(prefs);
  44   }
  45 }