athena/env/athena_env_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/env/public/athena_env.h"
   6
   7 #include <vector>
   8
   9 #include "athena/util/fill_layout_manager.h"
  10 #include "base/sys_info.h"
  11 #include "ui/aura/client/aura_constants.h"
  12 #include "ui/aura/client/cursor_client.h"
  13 #include "ui/aura/client/default_capture_client.h"
  14 #include "ui/aura/env.h"
  15 #include "ui/aura/test/test_screen.h"
  16 #include "ui/aura/window_event_dispatcher.h"
  17 #include "ui/aura/window_tree_host.h"
  18 #include "ui/aura/window_tree_host_observer.h"
  19 #include "ui/base/cursor/cursor.h"
  20 #include "ui/base/cursor/image_cursors.h"
  21 #include "ui/chromeos/user_activity_power_manager_notifier.h"
  22 #include "ui/display/chromeos/display_configurator.h"
  23 #include "ui/display/types/display_mode.h"
  24 #include "ui/display/types/display_snapshot.h"
  25 #include "ui/gfx/screen.h"
  26 #include "ui/wm/core/compound_event_filter.h"
  27 #include "ui/wm/core/cursor_manager.h"
  28 #include "ui/wm/core/input_method_event_filter.h"
  29 #include "ui/wm/core/native_cursor_manager.h"
  30 #include "ui/wm/core/native_cursor_manager_delegate.h"
  31 #include "ui/wm/core/user_activity_detector.h"
  32
  33 namespace athena {
  34
  35 namespace {
  36
  37 AthenaEnv* instance = nullptr;
  38
  39 // Screen object used during shutdown.
  40 gfx::Screen* screen_for_shutdown = nullptr;
  41
  42 // TODO(flackr:oshima): Remove this once athena switches to share
  43 // ash::DisplayManager.
  44 class ScreenForShutdown : public gfx::Screen {
  45  public:
  46   // Creates and sets the screen for shutdown. Deletes existing one if any.
  47   static void Create(const gfx::Screen* screen) {
  48     delete screen_for_shutdown;
  49     screen_for_shutdown = new ScreenForShutdown(screen->GetPrimaryDisplay());
  50     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE,
  51                                    screen_for_shutdown);
  52   }
  53
  54  private:
  55   explicit ScreenForShutdown(const gfx::Display& primary_display)
  56       : primary_display_(primary_display) {}
  57
  58   // gfx::Screen overrides:
  59   gfx::Point GetCursorScreenPoint() override { return gfx::Point(); }
  60   gfx::NativeWindow GetWindowUnderCursor() override { return NULL; }
  61   gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) override {
  62     return nullptr;
  63   }
  64   int GetNumDisplays() const override { return 1; }
  65   std::vector<gfx::Display> GetAllDisplays() const override {
  66     std::vector<gfx::Display> displays(1, primary_display_);
  67     return displays;
  68   }
  69   gfx::Display GetDisplayNearestWindow(gfx::NativeView view) const override {
  70     return primary_display_;
  71   }
  72   gfx::Display GetDisplayNearestPoint(const gfx::Point& point) const override {
  73     return primary_display_;
  74   }
  75   gfx::Display GetDisplayMatching(const gfx::Rect& match_rect) const override {
  76     return primary_display_;
  77   }
  78   gfx::Display GetPrimaryDisplay() const override { return primary_display_; }
  79   void AddObserver(gfx::DisplayObserver* observer) override {
  80     NOTREACHED() << "Observer should not be added during shutdown";
  81   }
  82   void RemoveObserver(gfx::DisplayObserver* observer) override {}
  83
  84   const gfx::Display primary_display_;
  85
  86   DISALLOW_COPY_AND_ASSIGN(ScreenForShutdown);
  87 };
  88
  89 // A class that bridges the gap between CursorManager and Aura. It borrows
  90 // heavily from AshNativeCursorManager.
  91 class AthenaNativeCursorManager : public wm::NativeCursorManager {
  92  public:
  93   explicit AthenaNativeCursorManager(aura::WindowTreeHost* host)
  94       : host_(host), image_cursors_(new ui::ImageCursors) {}
  95   ~AthenaNativeCursorManager() override {}
  96
  97   // wm::NativeCursorManager overrides.
  98   void SetDisplay(const gfx::Display& display,
  99                   wm::NativeCursorManagerDelegate* delegate) override {
 100     if (image_cursors_->SetDisplay(display, display.device_scale_factor()))
 101       SetCursor(delegate->GetCursor(), delegate);
 102   }
 103
 104   void SetCursor(gfx::NativeCursor cursor,
 105                  wm::NativeCursorManagerDelegate* delegate) override {
 106     image_cursors_->SetPlatformCursor(&cursor);
 107     cursor.set_device_scale_factor(image_cursors_->GetScale());
 108     delegate->CommitCursor(cursor);
 109
 110     if (delegate->IsCursorVisible())
 111       ApplyCursor(cursor);
 112   }
 113
 114   void SetVisibility(bool visible,
 115                      wm::NativeCursorManagerDelegate* delegate) override {
 116     delegate->CommitVisibility(visible);
 117
 118     if (visible) {
 119       SetCursor(delegate->GetCursor(), delegate);
 120     } else {
 121       gfx::NativeCursor invisible_cursor(ui::kCursorNone);
 122       image_cursors_->SetPlatformCursor(&invisible_cursor);
 123       ApplyCursor(invisible_cursor);
 124     }
 125   }
 126
 127   void SetCursorSet(ui::CursorSetType cursor_set,
 128                     wm::NativeCursorManagerDelegate* delegate) override {
 129     image_cursors_->SetCursorSet(cursor_set);
 130     delegate->CommitCursorSet(cursor_set);
 131     if (delegate->IsCursorVisible())
 132       SetCursor(delegate->GetCursor(), delegate);
 133   }
 134
 135   void SetMouseEventsEnabled(
 136       bool enabled,
 137       wm::NativeCursorManagerDelegate* delegate) override {
 138     delegate->CommitMouseEventsEnabled(enabled);
 139     SetVisibility(delegate->IsCursorVisible(), delegate);
 140   }
 141
 142  private:
 143   // Sets |cursor| as the active cursor within Aura.
 144   void ApplyCursor(gfx::NativeCursor cursor) { host_->SetCursor(cursor); }
 145
 146   aura::WindowTreeHost* host_;  // Not owned.
 147
 148   scoped_ptr<ui::ImageCursors> image_cursors_;
 149
 150   DISALLOW_COPY_AND_ASSIGN(AthenaNativeCursorManager);
 151 };
 152
 153 class AthenaEnvImpl : public AthenaEnv,
 154                       public aura::WindowTreeHostObserver,
 155                       public ui::DisplayConfigurator::Observer {
 156  public:
 157   AthenaEnvImpl() : display_configurator_(new ui::DisplayConfigurator) {
 158     display_configurator_->Init(false);
 159     display_configurator_->ForceInitialConfigure(0);
 160     display_configurator_->AddObserver(this);
 161
 162     gfx::Size screen_size = GetPrimaryDisplaySize();
 163     if (screen_size.IsEmpty()) {
 164       // TODO(oshima): Remove this hack.
 165       if (base::SysInfo::IsRunningOnChromeOS())
 166         screen_size.SetSize(2560, 1600);
 167       else
 168         screen_size.SetSize(1280, 720);
 169     }
 170     screen_.reset(aura::TestScreen::Create(screen_size));
 171
 172     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, screen_.get());
 173     host_.reset(screen_->CreateHostForPrimaryDisplay());
 174     host_->InitHost();
 175
 176     aura::Window* root_window = GetHost()->window();
 177     input_method_filter_.reset(
 178         new wm::InputMethodEventFilter(host_->GetAcceleratedWidget()));
 179     input_method_filter_->SetInputMethodPropertyInRootWindow(root_window);
 180
 181     root_window_event_filter_.reset(new wm::CompoundEventFilter);
 182     host_->window()->AddPreTargetHandler(root_window_event_filter_.get());
 183
 184     root_window_event_filter_->AddHandler(input_method_filter_.get());
 185
 186     capture_client_.reset(
 187         new aura::client::DefaultCaptureClient(host_->window()));
 188
 189     // Ensure new windows fill the display.
 190     root_window->SetLayoutManager(new FillLayoutManager(root_window));
 191
 192     cursor_manager_.reset(
 193         new wm::CursorManager(scoped_ptr<wm::NativeCursorManager>(
 194             new AthenaNativeCursorManager(host_.get()))));
 195     cursor_manager_->SetDisplay(
 196         gfx::Screen::GetNativeScreen()->GetPrimaryDisplay());
 197     cursor_manager_->SetCursor(ui::kCursorPointer);
 198     aura::client::SetCursorClient(host_->window(), cursor_manager_.get());
 199
 200     user_activity_detector_.reset(new wm::UserActivityDetector);
 201     host_->event_processor()->GetRootTarget()->AddPreTargetHandler(
 202         user_activity_detector_.get());
 203     user_activity_notifier_.reset(new ui::UserActivityPowerManagerNotifier(
 204         user_activity_detector_.get()));
 205
 206     host_->AddObserver(this);
 207     host_->Show();
 208
 209     DCHECK(!instance);
 210     instance = this;
 211   }
 212
 213   ~AthenaEnvImpl() override {
 214     instance = nullptr;
 215
 216     host_->RemoveObserver(this);
 217     if (input_method_filter_)
 218       root_window_event_filter_->RemoveHandler(input_method_filter_.get());
 219     if (user_activity_detector_) {
 220       host_->event_processor()->GetRootTarget()->RemovePreTargetHandler(
 221           user_activity_detector_.get());
 222     }
 223     root_window_event_filter_.reset();
 224     capture_client_.reset();
 225     input_method_filter_.reset();
 226     cursor_manager_.reset();
 227     user_activity_notifier_.reset();
 228     user_activity_detector_.reset();
 229
 230     input_method_filter_.reset();
 231     host_.reset();
 232
 233     ScreenForShutdown::Create(screen_.get());
 234     screen_.reset();
 235     aura::Env::DeleteInstance();
 236
 237     display_configurator_->RemoveObserver(this);
 238     display_configurator_.reset();
 239   }
 240
 241  private:
 242   struct Finder {
 243     explicit Finder(const base::Closure& c) : closure(c) {}
 244     bool operator()(const base::Closure& other) {
 245       return closure.Equals(other);
 246     }
 247     base::Closure closure;
 248   };
 249
 250   // AthenaEnv:
 251   aura::WindowTreeHost* GetHost() override { return host_.get(); }
 252
 253   void SetDisplayWorkAreaInsets(const gfx::Insets& insets) override {
 254     screen_->SetWorkAreaInsets(insets);
 255   }
 256
 257   void AddTerminatingCallback(const base::Closure& closure) override {
 258     if (closure.is_null())
 259       return;
 260     DCHECK(terminating_callbacks_.end() ==
 261            std::find_if(terminating_callbacks_.begin(),
 262                         terminating_callbacks_.end(),
 263                         Finder(closure)));
 264     terminating_callbacks_.push_back(closure);
 265   }
 266
 267   void RemoveTerminatingCallback(const base::Closure& closure) override {
 268     std::vector<base::Closure>::iterator iter =
 269         std::find_if(terminating_callbacks_.begin(),
 270                      terminating_callbacks_.end(),
 271                      Finder(closure));
 272     if (iter != terminating_callbacks_.end())
 273       terminating_callbacks_.erase(iter);
 274   }
 275
 276   void OnTerminating() override {
 277     for (std::vector<base::Closure>::iterator iter =
 278              terminating_callbacks_.begin();
 279          iter != terminating_callbacks_.end();
 280          ++iter) {
 281       iter->Run();
 282     }
 283   }
 284
 285   // ui::DisplayConfigurator::Observer:
 286   void OnDisplayModeChanged(
 287       const std::vector<ui::DisplayConfigurator::DisplayState>& displays)
 288       override {
 289     gfx::Size size = GetPrimaryDisplaySize();
 290     if (!size.IsEmpty())
 291       host_->UpdateRootWindowSize(size);
 292   }
 293
 294   // aura::WindowTreeHostObserver:
 295   void OnHostCloseRequested(const aura::WindowTreeHost* host) override {
 296     base::MessageLoopForUI::current()->PostTask(
 297         FROM_HERE, base::MessageLoop::QuitClosure());
 298   }
 299
 300   gfx::Size GetPrimaryDisplaySize() const {
 301     const std::vector<ui::DisplayConfigurator::DisplayState>& displays =
 302         display_configurator_->cached_displays();
 303     if (displays.empty())
 304       return gfx::Size();
 305     const ui::DisplayMode* mode = displays[0].display->current_mode();
 306     return mode ? mode->size() : gfx::Size();
 307   }
 308
 309   scoped_ptr<aura::TestScreen> screen_;
 310   scoped_ptr<aura::WindowTreeHost> host_;
 311
 312   scoped_ptr<wm::InputMethodEventFilter> input_method_filter_;
 313   scoped_ptr<wm::CompoundEventFilter> root_window_event_filter_;
 314   scoped_ptr<aura::client::DefaultCaptureClient> capture_client_;
 315   scoped_ptr<wm::CursorManager> cursor_manager_;
 316   scoped_ptr<wm::UserActivityDetector> user_activity_detector_;
 317   scoped_ptr<ui::DisplayConfigurator> display_configurator_;
 318   scoped_ptr<ui::UserActivityPowerManagerNotifier> user_activity_notifier_;
 319
 320   std::vector<base::Closure> terminating_callbacks_;
 321
 322   DISALLOW_COPY_AND_ASSIGN(AthenaEnvImpl);
 323 };
 324
 325 }  // namespace
 326
 327 // static
 328 void AthenaEnv::Create() {
 329   DCHECK(!instance);
 330   new AthenaEnvImpl();
 331 }
 332
 333 AthenaEnv* AthenaEnv::Get() {
 334   DCHECK(instance);
 335   return instance;
 336 }
 337
 338 // static
 339
 340 // static
 341 void AthenaEnv::Shutdown() {
 342   DCHECK(instance);
 343   delete instance;
 344 }
 345
 346 }  // namespace athena