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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 "ui/gfx/display_change_notifier.h" | |
| 6 | |
| 7 #include <stdint.h> | |
| 8 | |
| 9 #include "ui/gfx/display.h" | |
| 10 #include "ui/gfx/display_observer.h" | |
| 11 | |
| 12 namespace gfx { | |
| 13 | |
| 14 namespace { | |
| 15 | |
| 16 class DisplayComparator { | |
| 17 public: | |
| 18 explicit DisplayComparator(const Display& display) | |
| 19 : display_id_(display.id()) | |
| 20 {} | |
| 21 | |
| 22 bool operator()(const Display& display) const { | |
| 23 return display.id() == display_id_; | |
| 24 } | |
| 25 | |
| 26 private: | |
| 27 int64_t display_id_; | |
| 28 }; | |
| 29 | |
| 30 } // anonymous namespace | |
| 31 | |
| 32 DisplayChangeNotifier::DisplayChangeNotifier() { | |
| 33 } | |
| 34 | |
| 35 DisplayChangeNotifier::~DisplayChangeNotifier() { | |
| 36 } | |
| 37 | |
| 38 void DisplayChangeNotifier::AddObserver(DisplayObserver* obs) { | |
| 39 observer_list_.AddObserver(obs); | |
| 40 } | |
| 41 | |
| 42 void DisplayChangeNotifier::RemoveObserver(DisplayObserver* obs) { | |
| 43 observer_list_.RemoveObserver(obs); | |
| 44 } | |
| 45 | |
| 46 void DisplayChangeNotifier::NotifyDisplaysChanged( | |
| 47 const std::vector<Display>& old_displays, | |
| 48 const std::vector<Display>& new_displays) { | |
| 49 // Display present in old_displays but not in new_displays has been removed. | |
| 50 std::vector<Display>::const_iterator old_it = old_displays.begin(); | |
| 51 for (; old_it != old_displays.end(); ++old_it) { | |
| 52 if (std::find_if(new_displays.begin(), new_displays.end(), | |
| 53 DisplayComparator(*old_it)) == new_displays.end()) { | |
| 54 FOR_EACH_OBSERVER(DisplayObserver, observer_list_, | |
| 55 OnDisplayRemoved(*old_it)); | |
| 56 } | |
| 57 } | |
| 58 | |
| 59 // Display present in new_displays but not in old_displays has been added. | |
| 60 // Display present in both might have been modified. | |
| 61 for (std::vector<Display>::const_iterator new_it = | |
| 62 new_displays.begin(); new_it != new_displays.end(); ++new_it) { | |
| 63 std::vector<Display>::const_iterator old_it = std::find_if( | |
| 64 old_displays.begin(), old_displays.end(), DisplayComparator(*new_it)); | |
| 65 | |
| 66 if (old_it == old_displays.end()) { | |
| 67 FOR_EACH_OBSERVER(DisplayObserver, observer_list_, | |
| 68 OnDisplayAdded(*new_it)); | |
| 69 continue; | |
| 70 } | |
| 71 | |
| 72 uint32_t metrics = DisplayObserver::DISPLAY_METRIC_NONE; | |
| 73 | |
| 74 if (new_it->bounds() != old_it->bounds()) | |
| 75 metrics |= DisplayObserver::DISPLAY_METRIC_BOUNDS; | |
| 76 | |
| 77 if (new_it->rotation() != old_it->rotation()) | |
| 78 metrics |= DisplayObserver::DISPLAY_METRIC_ROTATION; | |
| 79 | |
| 80 if (new_it->work_area() != old_it->work_area()) | |
| 81 metrics |= DisplayObserver::DISPLAY_METRIC_WORK_AREA; | |
| 82 | |
| 83 if (new_it->device_scale_factor() != old_it->device_scale_factor()) | |
| 84 metrics |= DisplayObserver::DISPLAY_METRIC_DEVICE_SCALE_FACTOR; | |
| 85 | |
| 86 if (metrics != DisplayObserver::DISPLAY_METRIC_NONE) { | |
| 87 FOR_EACH_OBSERVER(DisplayObserver, | |
| 88 observer_list_, | |
| 89 OnDisplayMetricsChanged(*new_it, metrics)); | |
| 90 } | |
| 91 } | |
| 92 } | |
| 93 | |
| 94 } // namespace gfx | |
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Chromium Code Reviews
Issue 1964153002:
Move Screen, its impls, DisplayObserver and DisplayChangeNotifier to ui/display (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master