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| 1 // Copyright (c) 2012 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/wm/core/capture_controller.h" | |
| 6 | |
| 7 #include "ui/aura/window.h" | |
| 8 #include "ui/aura/window_event_dispatcher.h" | |
| 9 #include "ui/aura/window_tree_host.h" | |
| 10 | |
| 11 namespace wm { | |
| 12 | |
| 13 //////////////////////////////////////////////////////////////////////////////// | |
| 14 // CaptureController, public: | |
| 15 | |
| 16 void CaptureController::Attach(aura::Window* root) { | |
| 17 DCHECK_EQ(0u, root_windows_.count(root)); | |
| 18 root_windows_.insert(root); | |
| 19 aura::client::SetCaptureClient(root, this); | |
| 20 } | |
| 21 | |
| 22 void CaptureController::Detach(aura::Window* root) { | |
| 23 root_windows_.erase(root); | |
| 24 aura::client::SetCaptureClient(root, NULL); | |
| 25 } | |
| 26 | |
| 27 //////////////////////////////////////////////////////////////////////////////// | |
| 28 // CaptureController, aura::client::CaptureClient implementation: | |
| 29 | |
| 30 void CaptureController::SetCapture(aura::Window* new_capture_window) { | |
| 31 if (capture_window_ == new_capture_window) | |
| 32 return; | |
| 33 | |
| 34 // Make sure window has a root window. | |
| 35 DCHECK(!new_capture_window || new_capture_window->GetRootWindow()); | |
| 36 DCHECK(!capture_window_ || capture_window_->GetRootWindow()); | |
| 37 | |
| 38 aura::Window* old_capture_window = capture_window_; | |
| 39 aura::Window* old_capture_root = old_capture_window ? | |
| 40 old_capture_window->GetRootWindow() : NULL; | |
| 41 | |
| 42 // Copy the list in case it's modified out from under us. | |
| 43 RootWindows root_windows(root_windows_); | |
| 44 | |
| 45 // If we're actually starting capture, then cancel any touches/gestures | |
| 46 // that aren't already locked to the new window, and transfer any on the | |
| 47 // old capture window to the new one. When capture is released we have no | |
| 48 // distinction between the touches/gestures that were in the window all | |
| 49 // along (and so shouldn't be canceled) and those that got moved, so | |
| 50 // just leave them all where they are. | |
| 51 if (new_capture_window) { | |
| 52 ui::GestureRecognizer::Get()->TransferEventsTo(old_capture_window, | |
| 53 new_capture_window); | |
| 54 } | |
| 55 | |
| 56 capture_window_ = new_capture_window; | |
| 57 | |
| 58 for (RootWindows::const_iterator i = root_windows.begin(); | |
| 59 i != root_windows.end(); ++i) { | |
| 60 aura::client::CaptureDelegate* delegate = (*i)->GetHost()->dispatcher(); | |
| 61 delegate->UpdateCapture(old_capture_window, new_capture_window); | |
| 62 } | |
| 63 | |
| 64 aura::Window* capture_root = | |
| 65 capture_window_ ? capture_window_->GetRootWindow() : NULL; | |
| 66 if (capture_root != old_capture_root) { | |
| 67 if (old_capture_root) { | |
| 68 aura::client::CaptureDelegate* delegate = | |
| 69 old_capture_root->GetHost()->dispatcher(); | |
| 70 delegate->ReleaseNativeCapture(); | |
| 71 } | |
| 72 if (capture_root) { | |
| 73 aura::client::CaptureDelegate* delegate = | |
| 74 capture_root->GetHost()->dispatcher(); | |
| 75 delegate->SetNativeCapture(); | |
| 76 } | |
| 77 } | |
| 78 } | |
| 79 | |
| 80 void CaptureController::ReleaseCapture(aura::Window* window) { | |
| 81 if (capture_window_ != window) | |
| 82 return; | |
| 83 SetCapture(NULL); | |
| 84 } | |
| 85 | |
| 86 aura::Window* CaptureController::GetCaptureWindow() { | |
| 87 return capture_window_; | |
| 88 } | |
| 89 | |
| 90 aura::Window* CaptureController::GetGlobalCaptureWindow() { | |
| 91 return capture_window_; | |
| 92 } | |
| 93 | |
| 94 //////////////////////////////////////////////////////////////////////////////// | |
| 95 // CaptureController, private: | |
| 96 | |
| 97 CaptureController::CaptureController() | |
| 98 : capture_window_(NULL) { | |
| 99 } | |
| 100 | |
| 101 CaptureController::~CaptureController() { | |
| 102 } | |
| 103 | |
| 104 //////////////////////////////////////////////////////////////////////////////// | |
| 105 // ScopedCaptureClient: | |
| 106 | |
| 107 // static | |
| 108 CaptureController* ScopedCaptureClient::capture_controller_ = NULL; | |
| 109 | |
| 110 ScopedCaptureClient::ScopedCaptureClient(aura::Window* root) | |
| 111 : root_window_(root) { | |
| 112 root->AddObserver(this); | |
| 113 if (!capture_controller_) | |
| 114 capture_controller_ = new CaptureController; | |
| 115 capture_controller_->Attach(root); | |
| 116 } | |
| 117 | |
| 118 ScopedCaptureClient::~ScopedCaptureClient() { | |
| 119 Shutdown(); | |
| 120 } | |
| 121 | |
| 122 // static | |
| 123 bool ScopedCaptureClient::IsActive() { | |
| 124 return capture_controller_ && capture_controller_->is_active(); | |
| 125 } | |
| 126 | |
| 127 void ScopedCaptureClient::OnWindowDestroyed(aura::Window* window) { | |
| 128 DCHECK_EQ(window, root_window_); | |
| 129 Shutdown(); | |
| 130 } | |
| 131 | |
| 132 void ScopedCaptureClient::Shutdown() { | |
| 133 if (!root_window_) | |
| 134 return; | |
| 135 | |
| 136 root_window_->RemoveObserver(this); | |
| 137 capture_controller_->Detach(root_window_); | |
| 138 if (!capture_controller_->is_active()) { | |
| 139 delete capture_controller_; | |
| 140 capture_controller_ = NULL; | |
| 141 } | |
| 142 root_window_ = NULL; | |
| 143 } | |
| 144 | |
| 145 } // namespace wm | |
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