chrome/browser/ui/zoom/zoom_event_manager.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/ui/zoom/zoom_event_manager.h"
   6
   7 #include "content/public/browser/browser_context.h"
   8
   9 namespace {
  10 static const char kBrowserZoomEventManager[] = "browser_zoom_event_manager";
  11 }
  12
  13 ZoomEventManager* ZoomEventManager::GetForBrowserContext(
  14     content::BrowserContext* context) {
  15   if (!context->GetUserData(kBrowserZoomEventManager))
  16     context->SetUserData(kBrowserZoomEventManager, new ZoomEventManager);
  17   return static_cast<ZoomEventManager*>(
  18       context->GetUserData(kBrowserZoomEventManager));
  19 }
  20
  21 ZoomEventManager::ZoomEventManager() {}
  22
  23 ZoomEventManager::~ZoomEventManager() {}
  24
  25 void ZoomEventManager::OnZoomLevelChanged(
  26     const content::HostZoomMap::ZoomLevelChange& change) {
  27   zoom_level_changed_callbacks_.Notify(change);
  28 }
  29
  30 scoped_ptr<content::HostZoomMap::Subscription>
  31 ZoomEventManager::AddZoomLevelChangedCallback(
  32     const content::HostZoomMap::ZoomLevelChangedCallback& callback) {
  33   return zoom_level_changed_callbacks_.Add(callback);
  34 }