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/views/corewm/window_modality_controller.h" 6 7 #include <algorithm> 8 9 #include "ui/aura/client/aura_constants.h" 10 #include "ui/aura/client/capture_client.h" 11 #include "ui/aura/env.h" 12 #include "ui/aura/root_window.h" 13 #include "ui/aura/window.h" 14 #include "ui/aura/window_property.h" 15 #include "ui/base/events/event.h" 16 #include "ui/base/ui_base_types.h" 17 #include "ui/views/corewm/window_animations.h" 18 #include "ui/views/corewm/window_util.h" 19 20 namespace views { 21 namespace corewm { 22 23 // Transient child's modal parent. 24 extern const aura::WindowProperty<aura::Window*>* const kModalParentKey; 25 DEFINE_WINDOW_PROPERTY_KEY(aura::Window*, kModalParentKey, NULL); 26 27 namespace { 28 29 bool HasAncestor(aura::Window* window, aura::Window* ancestor) { 30 if (!window) 31 return false; 32 if (window == ancestor) 33 return true; 34 return HasAncestor(window->parent(), ancestor); 35 } 36 37 bool TransientChildIsWindowModal(aura::Window* window) { 38 return window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_WINDOW; 39 } 40 41 bool TransientChildIsSystemModal(aura::Window* window) { 42 return window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_SYSTEM; 43 } 44 45 bool TransientChildIsChildModal(aura::Window* window) { 46 return window->GetProperty(aura::client::kModalKey) == ui::MODAL_TYPE_CHILD; 47 } 48 49 aura::Window* GetModalParent(aura::Window* window) { 50 return window->GetProperty(kModalParentKey); 51 } 52 53 bool IsModalTransientChild(aura::Window* transient, aura::Window* original) { 54 return transient->IsVisible() && 55 (TransientChildIsWindowModal(transient) || 56 TransientChildIsSystemModal(transient) || 57 (TransientChildIsChildModal(transient) && 58 (HasAncestor(original, GetModalParent(transient))))); 59 } 60 61 aura::Window* GetModalTransientChild( 62 aura::Window* activatable, 63 aura::Window* original) { 64 aura::Window::Windows::const_iterator it; 65 for (it = activatable->transient_children().begin(); 66 it != activatable->transient_children().end(); 67 ++it) { 68 aura::Window* transient = *it; 69 if (IsModalTransientChild(transient, original)) { 70 return transient->transient_children().empty() ? 71 transient : GetModalTransientChild(transient, original); 72 } 73 } 74 return NULL; 75 } 76 77 } // namespace 78 79 void SetModalParent(aura::Window* child, aura::Window* parent) { 80 child->SetProperty(kModalParentKey, parent); 81 } 82 83 aura::Window* GetModalTransient(aura::Window* window) { 84 if (!window) 85 return NULL; 86 87 // We always want to check the for the transient child of the toplevel window. 88 aura::Window* toplevel = GetToplevelWindow(window); 89 if (!toplevel) 90 return NULL; 91 92 return GetModalTransientChild(toplevel, window); 93 } 94 95 //////////////////////////////////////////////////////////////////////////////// 96 // WindowModalityController, public: 97 98 WindowModalityController::WindowModalityController() { 99 aura::Env::GetInstance()->AddObserver(this); 100 } 101 102 WindowModalityController::~WindowModalityController() { 103 aura::Env::GetInstance()->RemoveObserver(this); 104 for (size_t i = 0; i < windows_.size(); ++i) 105 windows_[i]->RemoveObserver(this); 106 } 107 108 //////////////////////////////////////////////////////////////////////////////// 109 // WindowModalityController, aura::EventFilter implementation: 110 111 void WindowModalityController::OnKeyEvent(ui::KeyEvent* event) { 112 aura::Window* target = static_cast<aura::Window*>(event->target()); 113 if (GetModalTransient(target)) 114 event->StopPropagation(); 115 } 116 117 void WindowModalityController::OnMouseEvent(ui::MouseEvent* event) { 118 aura::Window* target = static_cast<aura::Window*>(event->target()); 119 if (ProcessLocatedEvent(target, event)) 120 event->StopPropagation(); 121 } 122 123 void WindowModalityController::OnTouchEvent(ui::TouchEvent* event) { 124 aura::Window* target = static_cast<aura::Window*>(event->target()); 125 if (ProcessLocatedEvent(target, event)) 126 event->StopPropagation(); 127 } 128 129 //////////////////////////////////////////////////////////////////////////////// 130 // WindowModalityController, aura::EnvObserver implementation: 131 132 void WindowModalityController::OnWindowInitialized(aura::Window* window) { 133 windows_.push_back(window); 134 window->AddObserver(this); 135 } 136 137 //////////////////////////////////////////////////////////////////////////////// 138 // WindowModalityController, aura::WindowObserver implementation: 139 140 void WindowModalityController::OnWindowPropertyChanged(aura::Window* window, 141 const void* key, 142 intptr_t old) { 143 // In tests, we sometimes create the modality relationship after a window is 144 // visible. 145 if (key == aura::client::kModalKey && 146 window->GetProperty(aura::client::kModalKey) != ui::MODAL_TYPE_NONE && 147 window->IsVisible()) { 148 ActivateWindow(window); 149 } 150 } 151 152 void WindowModalityController::OnWindowVisibilityChanged( 153 aura::Window* window, 154 bool visible) { 155 if (visible && window->GetProperty(aura::client::kModalKey) == 156 ui::MODAL_TYPE_WINDOW) { 157 // Make sure no other window has capture, otherwise |window| won't get mouse 158 // events. 159 aura::Window* capture_window = aura::client::GetCaptureWindow(window); 160 if (capture_window) 161 capture_window->ReleaseCapture(); 162 } 163 } 164 165 void WindowModalityController::OnWindowDestroyed(aura::Window* window) { 166 windows_.erase(std::find(windows_.begin(), windows_.end(), window)); 167 window->RemoveObserver(this); 168 } 169 170 bool WindowModalityController::ProcessLocatedEvent(aura::Window* target, 171 ui::LocatedEvent* event) { 172 aura::Window* modal_transient_child = GetModalTransient(target); 173 if (modal_transient_child && (event->type() == ui::ET_MOUSE_PRESSED || 174 event->type() == ui::ET_TOUCH_PRESSED)) { 175 AnimateWindow(modal_transient_child, WINDOW_ANIMATION_TYPE_BOUNCE); 176 } 177 return !!modal_transient_child; 178 } 179 180 } // namespace corewm 181 } // namespace views 182