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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 "mojo/services/window_manager/capture_controller.h" |
| 6 |
| 7 #include "mojo/services/window_manager/capture_controller_observer.h" |
| 8 #include "third_party/mojo_services/src/view_manager/public/cpp/view_property.h" |
| 9 #include "third_party/mojo_services/src/view_manager/public/cpp/view_tracker.h" |
| 10 |
| 11 DECLARE_VIEW_PROPERTY_TYPE(window_manager::CaptureController*); |
| 12 |
| 13 namespace window_manager { |
| 14 |
| 15 namespace { |
| 16 DEFINE_VIEW_PROPERTY_KEY(CaptureController*, |
| 17 kRootViewCaptureController, |
| 18 nullptr); |
| 19 } // namespace |
| 20 |
| 21 CaptureController::CaptureController() |
| 22 : capture_view_(nullptr) {} |
| 23 |
| 24 CaptureController::~CaptureController() {} |
| 25 |
| 26 void CaptureController::AddObserver(CaptureControllerObserver* observer) { |
| 27 capture_controller_observers_.AddObserver(observer); |
| 28 } |
| 29 |
| 30 void CaptureController::RemoveObserver(CaptureControllerObserver* observer) { |
| 31 capture_controller_observers_.RemoveObserver(observer); |
| 32 } |
| 33 |
| 34 void CaptureController::SetCapture(mojo::View* view) { |
| 35 if (capture_view_ == view) |
| 36 return; |
| 37 |
| 38 if (capture_view_) |
| 39 capture_view_->RemoveObserver(this); |
| 40 |
| 41 mojo::View* old_capture_view = capture_view_; |
| 42 capture_view_ = view; |
| 43 |
| 44 if (capture_view_) |
| 45 capture_view_->AddObserver(this); |
| 46 |
| 47 NotifyCaptureChange(capture_view_, old_capture_view); |
| 48 } |
| 49 |
| 50 void CaptureController::ReleaseCapture(mojo::View* view) { |
| 51 if (capture_view_ != view) |
| 52 return; |
| 53 SetCapture(nullptr); |
| 54 } |
| 55 |
| 56 mojo::View* CaptureController::GetCapture() { |
| 57 return capture_view_; |
| 58 } |
| 59 |
| 60 void CaptureController::NotifyCaptureChange(mojo::View* new_capture, |
| 61 mojo::View* old_capture) { |
| 62 mojo::ViewTracker view_tracker; |
| 63 if (new_capture) |
| 64 view_tracker.Add(new_capture); |
| 65 if (old_capture) |
| 66 view_tracker.Add(old_capture); |
| 67 |
| 68 FOR_EACH_OBSERVER( |
| 69 CaptureControllerObserver, capture_controller_observers_, |
| 70 OnCaptureChanged(view_tracker.Contains(new_capture) ? new_capture |
| 71 : nullptr)); |
| 72 } |
| 73 |
| 74 void CaptureController::OnViewDestroying(mojo::View* view) { |
| 75 if (view == capture_view_) { |
| 76 view->RemoveObserver(this); |
| 77 NotifyCaptureChange(nullptr, view); |
| 78 capture_view_ = nullptr; |
| 79 } |
| 80 } |
| 81 |
| 82 void SetCaptureController(mojo::View* root_view, |
| 83 CaptureController* capture_controller) { |
| 84 DCHECK_EQ(root_view->GetRoot(), root_view); |
| 85 root_view->SetLocalProperty(kRootViewCaptureController, capture_controller); |
| 86 } |
| 87 |
| 88 CaptureController* GetCaptureController(mojo::View* root_view) { |
| 89 if (root_view) |
| 90 DCHECK_EQ(root_view->GetRoot(), root_view); |
| 91 return root_view ? |
| 92 root_view->GetLocalProperty(kRootViewCaptureController) : nullptr; |
| 93 } |
| 94 |
| 95 mojo::View* GetCaptureView(mojo::View* view) { |
| 96 mojo::View* root = view->GetRoot(); |
| 97 if (!root) |
| 98 return nullptr; |
| 99 CaptureController* controller = GetCaptureController(root); |
| 100 return controller ? controller->GetCapture() : nullptr; |
| 101 } |
| 102 |
| 103 } // namespace window_manager |
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