| // Copyright 2014 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ui/display/display_change_notifier.h" |
| |
| #include <stdint.h> |
| |
| #include "base/containers/contains.h" |
| #include "base/observer_list.h" |
| #include "base/ranges/algorithm.h" |
| #include "ui/display/display.h" |
| #include "ui/display/display_observer.h" |
| |
| namespace display { |
| |
| DisplayChangeNotifier::DisplayChangeNotifier() {} |
| |
| DisplayChangeNotifier::~DisplayChangeNotifier() {} |
| |
| void DisplayChangeNotifier::AddObserver(DisplayObserver* obs) { |
| observer_list_.AddObserver(obs); |
| } |
| |
| void DisplayChangeNotifier::RemoveObserver(DisplayObserver* obs) { |
| observer_list_.RemoveObserver(obs); |
| } |
| |
| void DisplayChangeNotifier::NotifyDisplaysChanged( |
| const std::vector<Display>& old_displays, |
| const std::vector<Display>& new_displays) { |
| bool did_remove_displays = false; |
| // Display present in old_displays but not in new_displays has been removed. |
| for (auto old_it = old_displays.begin(); old_it != old_displays.end(); |
| ++old_it) { |
| if (!base::Contains(new_displays, old_it->id(), &Display::id)) { |
| did_remove_displays = true; |
| for (DisplayObserver& observer : observer_list_) |
| observer.OnDisplayRemoved(*old_it); |
| } |
| } |
| |
| if (did_remove_displays) { |
| for (DisplayObserver& observer : observer_list_) |
| observer.OnDidRemoveDisplays(); |
| } |
| |
| // Display present in new_displays but not in old_displays has been added. |
| // Display present in both might have been modified. |
| for (auto new_it = new_displays.begin(); new_it != new_displays.end(); |
| ++new_it) { |
| auto old_it = base::ranges::find(old_displays, new_it->id(), &Display::id); |
| |
| if (old_it == old_displays.end()) { |
| for (DisplayObserver& observer : observer_list_) |
| observer.OnDisplayAdded(*new_it); |
| continue; |
| } |
| |
| uint32_t metrics = DisplayObserver::DISPLAY_METRIC_NONE; |
| |
| if (new_it->bounds() != old_it->bounds()) |
| metrics |= DisplayObserver::DISPLAY_METRIC_BOUNDS; |
| |
| if (new_it->rotation() != old_it->rotation()) |
| metrics |= DisplayObserver::DISPLAY_METRIC_ROTATION; |
| |
| if (new_it->work_area() != old_it->work_area()) |
| metrics |= DisplayObserver::DISPLAY_METRIC_WORK_AREA; |
| |
| if (new_it->device_scale_factor() != old_it->device_scale_factor()) |
| metrics |= DisplayObserver::DISPLAY_METRIC_DEVICE_SCALE_FACTOR; |
| |
| if (new_it->GetColorSpaces() != old_it->GetColorSpaces()) { |
| metrics |= DisplayObserver::DISPLAY_METRIC_COLOR_SPACE; |
| } |
| |
| if (metrics != DisplayObserver::DISPLAY_METRIC_NONE) { |
| for (DisplayObserver& observer : observer_list_) |
| observer.OnDisplayMetricsChanged(*new_it, metrics); |
| } |
| } |
| } |
| |
| void DisplayChangeNotifier::NotifyCurrentWorkspaceChanged( |
| const std::string& workspace) { |
| for (DisplayObserver& observer : observer_list_) |
| observer.OnCurrentWorkspaceChanged(workspace); |
| } |
| |
| } // namespace display |