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
9namespace {
10static const char kBrowserZoomEventManager[] = "browser_zoom_event_manager";
11}
12
13ZoomEventManager* 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
21ZoomEventManager::ZoomEventManager() {}
22
23ZoomEventManager::~ZoomEventManager() {}
24
25void ZoomEventManager::OnZoomLevelChanged(
26    const content::HostZoomMap::ZoomLevelChange& change) {
27  zoom_level_changed_callbacks_.Notify(change);
28}
29
30scoped_ptr<content::HostZoomMap::Subscription>
31ZoomEventManager::AddZoomLevelChangedCallback(
32    const content::HostZoomMap::ZoomLevelChangedCallback& callback) {
33  return zoom_level_changed_callbacks_.Add(callback);
34}
35