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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 "components/ui/zoom/zoom_event_manager.h" | |
6 | |
7 #include "components/ui/zoom/zoom_event_manager_observer.h" | |
8 #include "content/public/browser/browser_context.h" | |
9 | |
10 namespace { | |
11 static const char kBrowserZoomEventManager[] = "browser_zoom_event_manager"; | |
12 } | |
13 | |
14 namespace ui_zoom { | |
15 | |
16 ZoomEventManager* ZoomEventManager::GetForBrowserContext( | |
17 content::BrowserContext* context) { | |
18 if (!context->GetUserData(kBrowserZoomEventManager)) | |
19 context->SetUserData(kBrowserZoomEventManager, new ZoomEventManager); | |
20 return static_cast<ZoomEventManager*>( | |
21 context->GetUserData(kBrowserZoomEventManager)); | |
22 } | |
23 | |
24 ZoomEventManager::ZoomEventManager() : weak_ptr_factory_(this) { | |
25 } | |
26 | |
27 ZoomEventManager::~ZoomEventManager() { | |
28 } | |
29 | |
30 void ZoomEventManager::OnZoomLevelChanged( | |
31 const content::HostZoomMap::ZoomLevelChange& change) { | |
32 zoom_level_changed_callbacks_.Notify(change); | |
33 } | |
34 | |
35 std::unique_ptr<content::HostZoomMap::Subscription> | |
36 ZoomEventManager::AddZoomLevelChangedCallback( | |
37 const content::HostZoomMap::ZoomLevelChangedCallback& callback) { | |
38 return zoom_level_changed_callbacks_.Add(callback); | |
39 } | |
40 | |
41 void ZoomEventManager::OnDefaultZoomLevelChanged() { | |
42 FOR_EACH_OBSERVER(ZoomEventManagerObserver, observers_, | |
43 OnDefaultZoomLevelChanged()); | |
44 } | |
45 | |
46 void ZoomEventManager::AddZoomEventManagerObserver( | |
47 ZoomEventManagerObserver* observer) { | |
48 observers_.AddObserver(observer); | |
49 } | |
50 | |
51 void ZoomEventManager::RemoveZoomEventManagerObserver( | |
52 ZoomEventManagerObserver* observer) { | |
53 observers_.RemoveObserver(observer); | |
54 } | |
55 | |
56 } // namespace ui_zoom | |
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