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| 1 // Copyright (c) 2013 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 "content/public/browser/host_zoom_map.h" |
| 6 |
| 7 #include "content/browser/host_zoom_map_impl.h" |
| 8 |
| 9 namespace content { |
| 10 |
| 11 HostZoomMap::Observer::Observer() : host_zoom_map_(NULL) { |
| 12 } |
| 13 |
| 14 HostZoomMap::Observer::Observer(HostZoomMap* map) : host_zoom_map_(NULL) { |
| 15 Observe(map); |
| 16 } |
| 17 |
| 18 HostZoomMap::Observer::~Observer() { |
| 19 if (host_zoom_map_) |
| 20 host_zoom_map_->RemoveObserver(this); |
| 21 } |
| 22 |
| 23 void HostZoomMap::Observer::Observe(HostZoomMap* map) { |
| 24 if (host_zoom_map_) |
| 25 host_zoom_map_->RemoveObserver(this); |
| 26 host_zoom_map_ = static_cast<HostZoomMapImpl*>(map); |
| 27 host_zoom_map_->AddObserver(this); |
| 28 } |
| 29 |
| 30 void HostZoomMap::Observer::HostZoomMapImplDestroyed() { |
| 31 host_zoom_map_->RemoveObserver(this); |
| 32 host_zoom_map_ = NULL; |
| 33 } |
| 34 |
| 35 } // namespace content |
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