athena/wm/window_manager_impl.cc

   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 "athena/wm/public/window_manager.h"
   6
   7 #include <algorithm>
   8
   9 #include "athena/common/container_priorities.h"
  10 #include "athena/input/public/accelerator_manager.h"
  11 #include "athena/screen/public/screen_manager.h"
  12 #include "athena/wm/bezel_controller.h"
  13 #include "athena/wm/public/window_manager_observer.h"
  14 #include "athena/wm/split_view_controller.h"
  15 #include "athena/wm/title_drag_controller.h"
  16 #include "athena/wm/window_list_provider_impl.h"
  17 #include "athena/wm/window_overview_mode.h"
  18 #include "base/logging.h"
  19 #include "base/observer_list.h"
  20 #include "ui/aura/layout_manager.h"
  21 #include "ui/aura/window.h"
  22 #include "ui/wm/core/shadow_controller.h"
  23 #include "ui/wm/core/window_util.h"
  24 #include "ui/wm/core/wm_state.h"
  25 #include "ui/wm/public/activation_client.h"
  26 #include "ui/wm/public/window_types.h"
  27
  28 namespace athena {
  29 namespace {
  30
  31 class WindowManagerImpl : public WindowManager,
  32                           public WindowOverviewModeDelegate,
  33                           public aura::WindowObserver,
  34                           public AcceleratorHandler,
  35                           public TitleDragControllerDelegate {
  36  public:
  37   WindowManagerImpl();
  38   virtual ~WindowManagerImpl();
  39
  40   void Layout();
  41
  42   // WindowManager:
  43   virtual void ToggleOverview() OVERRIDE;
  44
  45   virtual bool IsOverviewModeActive() OVERRIDE;
  46
  47  private:
  48   enum Command {
  49     CMD_TOGGLE_OVERVIEW,
  50   };
  51
  52   // Sets whether overview mode is active.
  53   void SetInOverview(bool active);
  54
  55   void InstallAccelerators();
  56
  57   // WindowManager:
  58   virtual void AddObserver(WindowManagerObserver* observer) OVERRIDE;
  59   virtual void RemoveObserver(WindowManagerObserver* observer) OVERRIDE;
  60
  61   // WindowOverviewModeDelegate:
  62   virtual void OnSelectWindow(aura::Window* window) OVERRIDE;
  63   virtual void OnSplitViewMode(aura::Window* left,
  64                                aura::Window* right) OVERRIDE;
  65
  66   // aura::WindowObserver
  67   virtual void OnWindowAdded(aura::Window* new_window) OVERRIDE;
  68   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
  69
  70   // AcceleratorHandler:
  71   virtual bool IsCommandEnabled(int command_id) const OVERRIDE;
  72   virtual bool OnAcceleratorFired(int command_id,
  73                                   const ui::Accelerator& accelerator) OVERRIDE;
  74
  75   // TitleDragControllerDelegate:
  76   virtual aura::Window* GetWindowBehind(aura::Window* window) OVERRIDE;
  77   virtual void OnTitleDragStarted(aura::Window* window) OVERRIDE;
  78   virtual void OnTitleDragCompleted(aura::Window* window) OVERRIDE;
  79   virtual void OnTitleDragCanceled(aura::Window* window) OVERRIDE;
  80
  81   scoped_ptr<aura::Window> container_;
  82   scoped_ptr<WindowListProvider> window_list_provider_;
  83   scoped_ptr<WindowOverviewMode> overview_;
  84   scoped_ptr<BezelController> bezel_controller_;
  85   scoped_ptr<SplitViewController> split_view_controller_;
  86   scoped_ptr<wm::WMState> wm_state_;
  87   scoped_ptr<TitleDragController> title_drag_controller_;
  88   scoped_ptr<wm::ShadowController> shadow_controller_;
  89   ObserverList<WindowManagerObserver> observers_;
  90
  91   DISALLOW_COPY_AND_ASSIGN(WindowManagerImpl);
  92 };
  93
  94 class AthenaContainerLayoutManager : public aura::LayoutManager {
  95  public:
  96   AthenaContainerLayoutManager();
  97   virtual ~AthenaContainerLayoutManager();
  98
  99  private:
 100   // aura::LayoutManager:
 101   virtual void OnWindowResized() OVERRIDE;
 102   virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
 103   virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
 104   virtual void OnWindowRemovedFromLayout(aura::Window* child) OVERRIDE;
 105   virtual void OnChildWindowVisibilityChanged(aura::Window* child,
 106                                               bool visible) OVERRIDE;
 107   virtual void SetChildBounds(aura::Window* child,
 108                               const gfx::Rect& requested_bounds) OVERRIDE;
 109
 110   DISALLOW_COPY_AND_ASSIGN(AthenaContainerLayoutManager);
 111 };
 112
 113 class WindowManagerImpl* instance = NULL;
 114
 115 WindowManagerImpl::WindowManagerImpl() {
 116   ScreenManager::ContainerParams params("DefaultContainer", CP_DEFAULT);
 117   params.can_activate_children = true;
 118   container_.reset(ScreenManager::Get()->CreateDefaultContainer(params));
 119   container_->SetLayoutManager(new AthenaContainerLayoutManager);
 120   container_->AddObserver(this);
 121   window_list_provider_.reset(new WindowListProviderImpl(container_.get()));
 122   bezel_controller_.reset(new BezelController(container_.get()));
 123   split_view_controller_.reset(
 124       new SplitViewController(container_.get(), window_list_provider_.get()));
 125   bezel_controller_->set_left_right_delegate(split_view_controller_.get());
 126   container_->AddPreTargetHandler(bezel_controller_.get());
 127   title_drag_controller_.reset(new TitleDragController(container_.get(), this));
 128   wm_state_.reset(new wm::WMState());
 129   aura::client::ActivationClient* activation_client =
 130       aura::client::GetActivationClient(container_->GetRootWindow());
 131   shadow_controller_.reset(new wm::ShadowController(activation_client));
 132   instance = this;
 133   InstallAccelerators();
 134 }
 135
 136 WindowManagerImpl::~WindowManagerImpl() {
 137   overview_.reset();
 138   split_view_controller_.reset();
 139   window_list_provider_.reset();
 140   if (container_) {
 141     container_->RemoveObserver(this);
 142     container_->RemovePreTargetHandler(bezel_controller_.get());
 143   }
 144   // |title_drag_controller_| needs to be reset before |container_|.
 145   title_drag_controller_.reset();
 146   container_.reset();
 147   instance = NULL;
 148 }
 149
 150 void WindowManagerImpl::Layout() {
 151   if (!container_)
 152     return;
 153   gfx::Rect bounds = gfx::Rect(container_->bounds().size());
 154   const aura::Window::Windows& children = container_->children();
 155   for (aura::Window::Windows::const_iterator iter = children.begin();
 156        iter != children.end();
 157        ++iter) {
 158     if ((*iter)->type() == ui::wm::WINDOW_TYPE_NORMAL)
 159       (*iter)->SetBounds(bounds);
 160   }
 161 }
 162
 163 void WindowManagerImpl::ToggleOverview() {
 164   SetInOverview(overview_.get() == NULL);
 165 }
 166
 167 bool WindowManagerImpl::IsOverviewModeActive() {
 168   return overview_;
 169 }
 170
 171 void WindowManagerImpl::SetInOverview(bool active) {
 172   bool in_overview = !!overview_;
 173   if (active == in_overview)
 174     return;
 175
 176   bezel_controller_->set_left_right_delegate(
 177       active ? NULL : split_view_controller_.get());
 178   if (active) {
 179     split_view_controller_->DeactivateSplitMode();
 180     FOR_EACH_OBSERVER(WindowManagerObserver, observers_,
 181                       OnOverviewModeEnter());
 182     // Re-stack all windows in the order defined by window_list_provider_.
 183     aura::Window::Windows window_list = window_list_provider_->GetWindowList();
 184     aura::Window::Windows::iterator it;
 185     for (it = window_list.begin(); it != window_list.end(); ++it)
 186       container_->StackChildAtTop(*it);
 187     overview_ = WindowOverviewMode::Create(
 188         container_.get(), window_list_provider_.get(), this);
 189   } else {
 190     CHECK(!split_view_controller_->IsSplitViewModeActive());
 191     overview_.reset();
 192     FOR_EACH_OBSERVER(WindowManagerObserver, observers_,
 193                       OnOverviewModeExit());
 194   }
 195 }
 196
 197 void WindowManagerImpl::InstallAccelerators() {
 198   const AcceleratorData accelerator_data[] = {
 199       {TRIGGER_ON_PRESS, ui::VKEY_F6, ui::EF_NONE, CMD_TOGGLE_OVERVIEW,
 200        AF_NONE},
 201   };
 202   AcceleratorManager::Get()->RegisterAccelerators(
 203       accelerator_data, arraysize(accelerator_data), this);
 204 }
 205
 206 void WindowManagerImpl::AddObserver(WindowManagerObserver* observer) {
 207   observers_.AddObserver(observer);
 208 }
 209
 210 void WindowManagerImpl::RemoveObserver(WindowManagerObserver* observer) {
 211   observers_.RemoveObserver(observer);
 212 }
 213
 214 void WindowManagerImpl::OnSelectWindow(aura::Window* window) {
 215   wm::ActivateWindow(window);
 216   SetInOverview(false);
 217 }
 218
 219 void WindowManagerImpl::OnSplitViewMode(aura::Window* left,
 220                                         aura::Window* right) {
 221   SetInOverview(false);
 222   split_view_controller_->ActivateSplitMode(left, right);
 223 }
 224
 225 void WindowManagerImpl::OnWindowAdded(aura::Window* new_window) {
 226   if (new_window->type() == ui::wm::WINDOW_TYPE_NORMAL)
 227     SetInOverview(false);
 228 }
 229
 230 void WindowManagerImpl::OnWindowDestroying(aura::Window* window) {
 231   if (window == container_)
 232     container_.reset();
 233 }
 234
 235 bool WindowManagerImpl::IsCommandEnabled(int command_id) const {
 236   return true;
 237 }
 238
 239 bool WindowManagerImpl::OnAcceleratorFired(int command_id,
 240                                            const ui::Accelerator& accelerator) {
 241   switch (command_id) {
 242     case CMD_TOGGLE_OVERVIEW:
 243       ToggleOverview();
 244       break;
 245   }
 246   return true;
 247 }
 248
 249 aura::Window* WindowManagerImpl::GetWindowBehind(aura::Window* window) {
 250   const aura::Window::Windows& windows = window_list_provider_->GetWindowList();
 251   aura::Window::Windows::const_reverse_iterator iter =
 252       std::find(windows.rbegin(), windows.rend(), window);
 253   CHECK(iter != windows.rend());
 254   ++iter;
 255   aura::Window* behind = NULL;
 256   if (iter != windows.rend())
 257     behind = *iter++;
 258
 259   if (split_view_controller_->IsSplitViewModeActive()) {
 260     aura::Window* left = split_view_controller_->left_window();
 261     aura::Window* right = split_view_controller_->right_window();
 262     CHECK(window == left || window == right);
 263     if (behind == left || behind == right)
 264       behind = (iter == windows.rend()) ? NULL : *iter;
 265   }
 266
 267   return behind;
 268 }
 269
 270 void WindowManagerImpl::OnTitleDragStarted(aura::Window* window) {
 271   aura::Window* next_window = GetWindowBehind(window);
 272   if (!next_window)
 273     return;
 274   // Make sure |window| is active. Also make sure that |next_window| is visible,
 275   // and positioned to match the top-left edge of |window|.
 276   wm::ActivateWindow(window);
 277   next_window->Show();
 278   int dx = window->bounds().x() - next_window->bounds().x();
 279   if (dx) {
 280     gfx::Transform transform;
 281     transform.Translate(dx, 0);
 282     next_window->SetTransform(transform);
 283   }
 284 }
 285
 286 void WindowManagerImpl::OnTitleDragCompleted(aura::Window* window) {
 287   aura::Window* next_window = GetWindowBehind(window);
 288   if (!next_window)
 289     return;
 290   if (split_view_controller_->IsSplitViewModeActive())
 291     split_view_controller_->ReplaceWindow(window, next_window);
 292   else
 293     OnSelectWindow(next_window);
 294   wm::ActivateWindow(next_window);
 295 }
 296
 297 void WindowManagerImpl::OnTitleDragCanceled(aura::Window* window) {
 298   aura::Window* next_window = GetWindowBehind(window);
 299   if (!next_window)
 300     return;
 301   next_window->SetTransform(gfx::Transform());
 302 }
 303
 304 AthenaContainerLayoutManager::AthenaContainerLayoutManager() {
 305 }
 306
 307 AthenaContainerLayoutManager::~AthenaContainerLayoutManager() {
 308 }
 309
 310 void AthenaContainerLayoutManager::OnWindowResized() {
 311   instance->Layout();
 312 }
 313
 314 void AthenaContainerLayoutManager::OnWindowAddedToLayout(aura::Window* child) {
 315   instance->Layout();
 316 }
 317
 318 void AthenaContainerLayoutManager::OnWillRemoveWindowFromLayout(
 319     aura::Window* child) {
 320 }
 321
 322 void AthenaContainerLayoutManager::OnWindowRemovedFromLayout(
 323     aura::Window* child) {
 324   instance->Layout();
 325 }
 326
 327 void AthenaContainerLayoutManager::OnChildWindowVisibilityChanged(
 328     aura::Window* child,
 329     bool visible) {
 330   instance->Layout();
 331 }
 332
 333 void AthenaContainerLayoutManager::SetChildBounds(
 334     aura::Window* child,
 335     const gfx::Rect& requested_bounds) {
 336   if (!requested_bounds.IsEmpty())
 337     SetChildBoundsDirect(child, requested_bounds);
 338 }
 339
 340 }  // namespace
 341
 342 // static
 343 WindowManager* WindowManager::Create() {
 344   DCHECK(!instance);
 345   new WindowManagerImpl;
 346   DCHECK(instance);
 347   return instance;
 348 }
 349
 350 // static
 351 void WindowManager::Shutdown() {
 352   DCHECK(instance);
 353   delete instance;
 354   DCHECK(!instance);
 355 }
 356
 357 // static
 358 WindowManager* WindowManager::GetInstance() {
 359   DCHECK(instance);
 360   return instance;
 361 }
 362
 363 }  // namespace athena