Unified Desktop: hook up ash to allow unified desktop mode

ash/display/mirror_window_controller.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/display/mirror_window_controller.h"
 
 #if defined(USE_X11)
 #include <X11/Xlib.h>
 #include <X11/extensions/XInput2.h>
 
@@ skipping 58 matching lines @@
 
   // Returns the current capture window.
   aura::Window* GetCaptureWindow() override { return NULL; }
   aura::Window* GetGlobalCaptureWindow() override { return NULL; }
 
   DISALLOW_COPY_AND_ASSIGN(NoneCaptureClient);
 };
 
 }  // namespace
 
+MirrorWindowController::MirroringHostInfo::MirroringHostInfo() {
+}
+MirrorWindowController::MirroringHostInfo::~MirroringHostInfo() {
+}
+
 MirrorWindowController::MirrorWindowController() {}
 
 MirrorWindowController::~MirrorWindowController() {
   // Make sure the root window gets deleted before cursor_window_delegate.
   Close();
 }
 
-void MirrorWindowController::UpdateWindow(const DisplayInfo& display_info) {
+void MirrorWindowController::UpdateWindow(
+    const std::vector<DisplayInfo>& display_info_list) {
   static int mirror_host_count = 0;
-  if (!ash_host_.get()) {
-    AshWindowTreeHostInitParams init_params;
-    init_params.initial_bounds = display_info.bounds_in_native();
-    ash_host_.reset(AshWindowTreeHost::Create(init_params));
-    aura::WindowTreeHost* host = ash_host_->AsWindowTreeHost();
-    host->window()->SetName(
-        base::StringPrintf("MirrorRootWindow-%d", mirror_host_count++));
-    host->compositor()->SetBackgroundColor(SK_ColorBLACK);
-    // No need to remove the observer because the DisplayController outlives the
-    // host.
-    host->AddObserver(Shell::GetInstance()->display_controller());
-    host->AddObserver(this);
-    // TODO(oshima): TouchHUD is using idkey.
-    InitRootWindowSettings(host->window())->display_id = display_info.id();
-    host->InitHost();
+  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
+  const gfx::Display& primary = Shell::GetScreen()->GetPrimaryDisplay();
+  const DisplayInfo& source_display_info =
+      display_manager->GetDisplayInfo(primary.id());
+
+  gfx::Point mirroring_origin;
+  for (const DisplayInfo& display_info : display_info_list) {
+    if (mirroring_host_info_map_.find(display_info.id()) ==
+        mirroring_host_info_map_.end()) {
+      AshWindowTreeHostInitParams init_params;
+      init_params.initial_bounds = display_info.bounds_in_native();
+      MirroringHostInfo* host_info = new MirroringHostInfo;
+      host_info->ash_host.reset(AshWindowTreeHost::Create(init_params));
+      mirroring_host_info_map_[display_info.id()] = host_info;
+
+      aura::WindowTreeHost* host = host_info->ash_host->AsWindowTreeHost();
+      host->window()->SetName(
+          base::StringPrintf("MirrorRootWindow-%d", mirror_host_count++));
+      host->compositor()->SetBackgroundColor(SK_ColorBLACK);
+      // No need to remove the observer because the DisplayController outlives
+      // the
+      // host.
+      host->AddObserver(Shell::GetInstance()->display_controller());
+      host->AddObserver(this);
+      // TODO(oshima): TouchHUD is using idkey.
+      InitRootWindowSettings(host->window())->display_id = display_info.id();
+      host->InitHost();
 #if defined(USE_X11)
-    DisableInput(host->GetAcceleratedWidget());
+      if (display_manager->multi_display_mode() != DisplayManager::UNIFIED)
+        DisableInput(host->GetAcceleratedWidget());
 #endif
 
-    aura::client::SetCaptureClient(host->window(), new NoneCaptureClient());
-    host->Show();
+#if defined(OS_CHROMEOS)
+      if (display_manager->multi_display_mode() == DisplayManager::UNIFIED) {
+        host_info->ash_host->ConfineCursorToRootWindow();
+        AshWindowTreeHost* unified_ash_host =
+            Shell::GetInstance()
+                ->display_controller()
+                ->GetAshWindowTreeHostForDisplayId(
+                    Shell::GetScreen()->GetPrimaryDisplay().id());
+        unified_ash_host->RegisterMirroringHost(host_info->ash_host.get());
+      }
+#endif
 
-    // TODO(oshima): Start mirroring.
-    aura::Window* mirror_window = new aura::Window(NULL);
-    mirror_window->Init(ui::LAYER_SOLID_COLOR);
-    host->window()->AddChild(mirror_window);
-    mirror_window->SetBounds(host->window()->bounds());
-    mirror_window->Show();
-    reflector_ = aura::Env::GetInstance()->context_factory()->CreateReflector(
-        Shell::GetPrimaryRootWindow()->GetHost()->compositor(),
-        mirror_window->layer());
-  } else {
-    aura::WindowTreeHost* host = ash_host_->AsWindowTreeHost();
-    GetRootWindowSettings(host->window())->display_id = display_info.id();
-    host->SetBounds(display_info.bounds_in_native());
+      aura::client::SetCaptureClient(host->window(), new NoneCaptureClient());
+      host->Show();
+
+      aura::Window* mirror_window = host_info->mirror_window =
+          new aura::Window(nullptr);
+      mirror_window->Init(ui::LAYER_SOLID_COLOR);
+      host->window()->AddChild(mirror_window);
+      mirror_window->SetBounds(host->window()->bounds());
+      mirror_window->Show();
+      if (reflector_) {
+        // TODO(oshima): Enable this once reflect change is landed.
+        // reflector_->AddMirroringLayer(mirror_window->layer());
+      } else {
+        reflector_ =
+            aura::Env::GetInstance()->context_factory()->CreateReflector(
+                Shell::GetPrimaryRootWindow()->GetHost()->compositor(),
+                mirror_window->layer());
+      }
+    } else {
+      aura::WindowTreeHost* host = mirroring_host_info_map_[display_info.id()]
+                                       ->ash_host->AsWindowTreeHost();
+      GetRootWindowSettings(host->window())->display_id = display_info.id();
+      host->SetBounds(display_info.bounds_in_native());
+    }
+
+    AshWindowTreeHost* mirroring_ash_host =
+        mirroring_host_info_map_[display_info.id()]->ash_host.get();
+    switch (display_manager->multi_display_mode()) {
+      case DisplayManager::MIRRORING: {
+        scoped_ptr<RootWindowTransformer> transformer(
+            CreateRootWindowTransformerForMirroredDisplay(source_display_info,
+                                                          display_info));
+        mirroring_ash_host->SetRootWindowTransformer(transformer.Pass());
+        break;
+      }
+      case DisplayManager::UNIFIED: {
+        gfx::Display display;
+        display.SetScaleAndBounds(
+            1.0f, gfx::Rect(mirroring_origin,
+                            display_info.bounds_in_native().size()));
+        mirroring_origin.SetPoint(display.bounds().right(), 0);
+        scoped_ptr<RootWindowTransformer> transformer(
+            CreateRootWindowTransformerForUnifiedDesktop(primary.bounds(),
+                                                         display));
+        mirroring_ash_host->SetRootWindowTransformer(transformer.Pass());
+        break;
+      }
+      case DisplayManager::EXTENDED:
+        NOTREACHED();
+    }
   }
 
-  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
-  const DisplayInfo& source_display_info = display_manager->GetDisplayInfo(
-      Shell::GetScreen()->GetPrimaryDisplay().id());
-  DCHECK(display_manager->IsInMirrorMode());
-  scoped_ptr<RootWindowTransformer> transformer(
-      CreateRootWindowTransformerForMirroredDisplay(source_display_info,
-                                                    display_info));
-  ash_host_->SetRootWindowTransformer(transformer.Pass());
+  // Deleting WTHs for disconnected displays.
+  if (mirroring_host_info_map_.size() > display_info_list.size()) {
+    for (MirroringHostInfoMap::iterator iter = mirroring_host_info_map_.begin();
+         iter != mirroring_host_info_map_.end();) {
+      if (std::find_if(display_info_list.begin(), display_info_list.end(),
+                       [iter](const DisplayInfo& info) {
+                         return info.id() == iter->first;
+                       }) == display_info_list.end()) {
+        CloseAndDeleteHost(iter->second);
+        iter = mirroring_host_info_map_.erase(iter);
+      } else {
+        ++iter;
+      }
+    }
+  }
 }
 
 void MirrorWindowController::UpdateWindow() {
-  if (ash_host_.get()) {
-    DisplayManager* display_manager = Shell::GetInstance()->display_manager();
-    const DisplayInfo& mirror_display_info = display_manager->GetDisplayInfo(
-        display_manager->mirroring_display_id());
-    UpdateWindow(mirror_display_info);
-  }
+  if (!mirroring_host_info_map_.size())
+    return;
+  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
+  std::vector<DisplayInfo> display_info_list;
+  for (auto& pair : mirroring_host_info_map_)
+    display_info_list.push_back(display_manager->GetDisplayInfo(pair.first));
+  UpdateWindow(display_info_list);
 }
 
 void MirrorWindowController::Close() {
-  if (ash_host_.get()) {
-    aura::WindowTreeHost* host = ash_host_->AsWindowTreeHost();
+  for (auto& info : mirroring_host_info_map_) {
+    CloseAndDeleteHost(info.second);
+  }
+  mirroring_host_info_map_.clear();
+  if (reflector_) {
     aura::Env::GetInstance()->context_factory()->RemoveReflector(
         reflector_.get());
-    reflector_ = nullptr;
-    NoneCaptureClient* capture_client = static_cast<NoneCaptureClient*>(
-        aura::client::GetCaptureClient(host->window()));
-    aura::client::SetCaptureClient(host->window(), NULL);
-    delete capture_client;
-
-    host->RemoveObserver(Shell::GetInstance()->display_controller());
-    host->RemoveObserver(this);
-    ash_host_.reset();
+    reflector_.reset();
   }
 }
 
 void MirrorWindowController::OnHostResized(const aura::WindowTreeHost* host) {
-  if (mirror_window_host_size_ == host->GetBounds().size())
-    return;
-  mirror_window_host_size_ = host->GetBounds().size();
-  reflector_->OnMirroringCompositorResized();
-  ash_host_->SetRootWindowTransformer(CreateRootWindowTransformer().Pass());
-  Shell::GetInstance()->display_controller()->cursor_window_controller()->
-      UpdateLocation();
+  for (auto& pair : mirroring_host_info_map_) {
+    MirroringHostInfo* info = pair.second;
+    if (info->ash_host->AsWindowTreeHost() == host) {
+      if (info->mirror_window_host_size == host->GetBounds().size())
+        return;
+      info->mirror_window_host_size = host->GetBounds().size();
+      reflector_->OnMirroringCompositorResized();
+      info->ash_host->SetRootWindowTransformer(
+          CreateRootWindowTransformer().Pass());
+      Shell::GetInstance()
+          ->display_controller()
+          ->cursor_window_controller()
+          ->UpdateLocation();
+      return;
+    }
+  }
 }
 
 aura::Window* MirrorWindowController::GetWindow() {
-  return ash_host_.get() ? ash_host_->AsWindowTreeHost()->window() : NULL;
+  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
+  if (display_manager->multi_display_mode() != DisplayManager::MIRRORING ||
+      mirroring_host_info_map_.empty()) {
+    return nullptr;
+  }
+
+  DCHECK_EQ(1U, mirroring_host_info_map_.size());
+  return mirroring_host_info_map_.begin()
+      ->second->ash_host->AsWindowTreeHost()
+      ->window();
+}
+
+void MirrorWindowController::CloseAndDeleteHost(MirroringHostInfo* host_info) {
+  aura::WindowTreeHost* host = host_info->ash_host->AsWindowTreeHost();
+  NoneCaptureClient* capture_client = static_cast<NoneCaptureClient*>(
+      aura::client::GetCaptureClient(host->window()));
+  aura::client::SetCaptureClient(host->window(), NULL);
+  delete capture_client;
+
+  host->RemoveObserver(Shell::GetInstance()->display_controller());
+  host->RemoveObserver(this);
+  // reflector_->RemoveMirroringLayer(host_info->mirror_window->layer());
+  delete host_info;
 }
 
 scoped_ptr<RootWindowTransformer>
 MirrorWindowController::CreateRootWindowTransformer() const {
   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
   const DisplayInfo& mirror_display_info =
       display_manager->GetDisplayInfo(display_manager->mirroring_display_id());
   const DisplayInfo& source_display_info = display_manager->GetDisplayInfo(
       Shell::GetScreen()->GetPrimaryDisplay().id());
   DCHECK(display_manager->IsInMirrorMode());
   return scoped_ptr<RootWindowTransformer>(
       CreateRootWindowTransformerForMirroredDisplay(source_display_info,
                                                     mirror_display_info));
 }
 
 }  // namespace ash