Changes how window manager obtains WindowTree from mus

ash/mus/window_manager_application.cc

 // Copyright 2015 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/mus/window_manager_application.h"
 
 #include <utility>
 
 #include "ash/mus/accelerator_registrar_impl.h"
-#include "ash/mus/bridge/wm_lookup_mus.h"
-#include "ash/mus/bridge/wm_shell_mus.h"
 #include "ash/mus/root_window_controller.h"
 #include "ash/mus/root_windows_observer.h"
 #include "ash/mus/shelf_layout_impl.h"
 #include "ash/mus/user_window_controller_impl.h"
+#include "ash/mus/window_manager.h"
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "components/mus/common/event_matcher_util.h"
 #include "components/mus/public/cpp/window.h"
-#include "components/mus/public/interfaces/window_manager_factory.mojom.h"
+#include "components/mus/public/cpp/window_tree_client.h"
 #include "services/shell/public/cpp/connection.h"
 #include "services/shell/public/cpp/connector.h"
 #include "services/tracing/public/cpp/tracing_impl.h"
 #include "ui/events/event.h"
 #include "ui/views/mus/aura_init.h"
-#include "ui/views/mus/screen_mus.h"
 
 namespace ash {
 namespace mus {
 
 WindowManagerApplication::WindowManagerApplication()
-    : connector_(nullptr), window_manager_factory_binding_(this) {}
+    : connector_(nullptr), screenlock_state_listener_binding_(this) {}
 
 WindowManagerApplication::~WindowManagerApplication() {
   // AcceleratorRegistrarImpl removes an observer in its destructor. Destroy
   // it early on.
   std::set<AcceleratorRegistrarImpl*> accelerator_registrars(
       accelerator_registrars_);
   for (AcceleratorRegistrarImpl* registrar : accelerator_registrars)
     registrar->Destroy();
 
-  std::set<RootWindowController*> controllers(root_controllers_);
-  for (RootWindowController* controller : controllers)
-    controller->Destroy();
-}
-
-std::set<RootWindowController*> WindowManagerApplication::GetRootControllers() {
-  std::set<RootWindowController*> root_controllers;
-  for (RootWindowController* controller : root_controllers_) {
-    if (controller->root())
-      root_controllers.insert(controller);
-  }
-  return root_controllers;
-}
-
-void WindowManagerApplication::OnRootWindowControllerGotRoot(
-    RootWindowController* root_controller) {
-  if (shell_)
-    return;  // |root_controller| is the > 1 root, nothing to do.
-
-  if (connector_)
-    aura_init_.reset(new views::AuraInit(connector_, "ash_mus_resources.pak"));
-
-  shell_.reset(new WmShellMus(root_controller->root()->window_tree()));
-  lookup_.reset(new WmLookupMus);
-}
-
-void WindowManagerApplication::OnRootWindowControllerDoneInit(
-    RootWindowController* root_controller) {
-  if (!screen_) {
-    std::unique_ptr<views::ScreenMus> screen(new views::ScreenMus(nullptr));
-    screen->Init(connector_);
-    screen_ = std::move(screen);
-  }
-
-  // TODO(msw): figure out if this should be per display, or global.
-  user_window_controller_->Initialize(root_controller);
-  for (auto& request : user_window_controller_requests_)
-    user_window_controller_bindings_.AddBinding(user_window_controller_.get(),
-                                                std::move(*request));
-  user_window_controller_requests_.clear();
-
-  // TODO(msw): figure out if this should be per display, or global.
-  shelf_layout_->Initialize(root_controller);
-  for (auto& request : shelf_layout_requests_)
-    shelf_layout_bindings_.AddBinding(shelf_layout_.get(), std::move(*request));
-  shelf_layout_requests_.clear();
-
-  FOR_EACH_OBSERVER(RootWindowsObserver, root_windows_observers_,
-                    OnRootWindowControllerAdded(root_controller));
-}
-
-void WindowManagerApplication::OnRootWindowDestroyed(
-    RootWindowController* root_controller) {
-  root_controllers_.erase(root_controller);
-  user_window_controller_.reset(nullptr);
+  // Destroy the WindowManager while still valid. This way we ensure
+  // OnWillDestroyRootWindowController() is called (if it hasn't been already).
+  window_manager_.reset();
 }
 
 void WindowManagerApplication::OnAccelerator(uint32_t id,
                                              const ui::Event& event) {
   for (auto* registrar : accelerator_registrars_) {
     if (registrar->OwnsAccelerator(id)) {
       registrar->ProcessAccelerator(id, event);
       break;
     }
   }
 }
 
-void WindowManagerApplication::AddRootWindowsObserver(
-    RootWindowsObserver* observer) {
-  root_windows_observers_.AddObserver(observer);
-}
-
-void WindowManagerApplication::RemoveRootWindowsObserver(
-    RootWindowsObserver* observer) {
-  root_windows_observers_.RemoveObserver(observer);
-}
-
 void WindowManagerApplication::OnAcceleratorRegistrarDestroyed(
     AcceleratorRegistrarImpl* registrar) {
   accelerator_registrars_.erase(registrar);
 }
 
-void WindowManagerApplication::AddRootWindowController(
-    RootWindowController* root_window_controller) {
-  root_controllers_.insert(root_window_controller);
+void WindowManagerApplication::InitWindowManager(
+    ::mus::WindowTreeClient* window_tree_client) {
+  window_manager_->Init(window_tree_client);
+  window_manager_->AddRootWindowsObserver(this);
 }
 
 void WindowManagerApplication::Initialize(shell::Connector* connector,
                                           const shell::Identity& identity,
                                           uint32_t id) {
   connector_ = connector;
-  if (connector) {
-    tracing_.Initialize(connector, identity.name());
+  window_manager_.reset(new WindowManager(this, connector_));
 
-    ::mus::mojom::WindowManagerFactoryServicePtr wm_factory_service;
-    connector_->ConnectToInterface("mojo:mus", &wm_factory_service);
-    wm_factory_service->SetWindowManagerFactory(
-        window_manager_factory_binding_.CreateInterfacePtrAndBind());
-  }
+  aura_init_.reset(new views::AuraInit(connector_, "ash_mus_resources.pak"));
 
-  shelf_layout_.reset(new ShelfLayoutImpl);
-  user_window_controller_.reset(new UserWindowControllerImpl());
+  tracing_.Initialize(connector, identity.name());
+
+  ::mus::WindowTreeClient* window_tree_client = new ::mus::WindowTreeClient(
+      window_manager_.get(), window_manager_.get(), nullptr);
+  window_tree_client->ConnectAsWindowManager(connector);
+
+  InitWindowManager(window_tree_client);
 }
 
 bool WindowManagerApplication::AcceptConnection(shell::Connection* connection) {
   connection->AddInterface<mojom::ShelfLayout>(this);
   connection->AddInterface<mojom::UserWindowController>(this);
   connection->AddInterface<::mus::mojom::AcceleratorRegistrar>(this);
-  if (connection->GetRemoteIdentity().name() == "mojo:mash_session")
+  if (connection->GetRemoteIdentity().name() == "mojo:mash_session") {
     connection->GetInterface(&session_);
+    session_->AddScreenlockStateListener(
+        screenlock_state_listener_binding_.CreateInterfacePtrAndBind());
+  }
   return true;
 }
 
 void WindowManagerApplication::Create(
     shell::Connection* connection,
     mojo::InterfaceRequest<mojom::ShelfLayout> request) {
   // TODO(msw): Handle multiple shelves (one per display).
-  if (!root_controllers_.empty() && (*root_controllers_.begin())->root()) {
+  if (!window_manager_->GetRootWindowControllers().empty()) {
     shelf_layout_bindings_.AddBinding(shelf_layout_.get(), std::move(request));
   } else {
     shelf_layout_requests_.push_back(base::WrapUnique(
         new mojo::InterfaceRequest<mojom::ShelfLayout>(std::move(request))));
   }
 }
 
 void WindowManagerApplication::Create(
     shell::Connection* connection,
     mojo::InterfaceRequest<mojom::UserWindowController> request) {
-  if (!root_controllers_.empty() && (*root_controllers_.begin())->root()) {
+  if (!window_manager_->GetRootWindowControllers().empty()) {
     user_window_controller_bindings_.AddBinding(user_window_controller_.get(),
                                                 std::move(request));
   } else {
     user_window_controller_requests_.push_back(base::WrapUnique(
         new mojo::InterfaceRequest<mojom::UserWindowController>(
             std::move(request))));
   }
 }
 
 void WindowManagerApplication::Create(
     shell::Connection* connection,
     mojo::InterfaceRequest<::mus::mojom::AcceleratorRegistrar> request) {
   static int accelerator_registrar_count = 0;
   if (accelerator_registrar_count == std::numeric_limits<int>::max()) {
     // Restart from zero if we have reached the limit. It is technically
     // possible to end up with multiple active registrars with the same
     // namespace, but it is highly unlikely. In the event that multiple
     // registrars have the same namespace, this new registrar will be unable to
     // install accelerators.
     accelerator_registrar_count = 0;
   }
   accelerator_registrars_.insert(new AcceleratorRegistrarImpl(
-      this, ++accelerator_registrar_count, std::move(request),
+      window_manager_.get(), ++accelerator_registrar_count, std::move(request),
       base::Bind(&WindowManagerApplication::OnAcceleratorRegistrarDestroyed,
                  base::Unretained(this))));
 }
 
-void WindowManagerApplication::CreateWindowManager(
-    ::mus::mojom::DisplayPtr display,
-    mojo::InterfaceRequest<::mus::mojom::WindowTreeClient> client_request) {
-  AddRootWindowController(RootWindowController::CreateFromDisplay(
-      this, std::move(display), std::move(client_request)));
+void WindowManagerApplication::ScreenlockStateChanged(bool locked) {
+  window_manager_->SetScreenLocked(locked);
+}
+
+void WindowManagerApplication::OnRootWindowControllerAdded(
+    RootWindowController* controller) {
+  if (user_window_controller_)
+    return;
+
+  // TODO(sky): |shelf_layout_| and |user_window_controller_| should really
+  // be owned by WindowManager and/or RootWindowController. But this code is
+  // temporary while migrating away from sysui.
+
+  shelf_layout_.reset(new ShelfLayoutImpl);
+  user_window_controller_.reset(new UserWindowControllerImpl());
+
+  // TODO(msw): figure out if this should be per display, or global.
+  user_window_controller_->Initialize(controller);
+  for (auto& request : user_window_controller_requests_)
+    user_window_controller_bindings_.AddBinding(user_window_controller_.get(),
+                                                std::move(*request));
+  user_window_controller_requests_.clear();
+
+  // TODO(msw): figure out if this should be per display, or global.
+  shelf_layout_->Initialize(controller);
+  for (auto& request : shelf_layout_requests_)
+    shelf_layout_bindings_.AddBinding(shelf_layout_.get(), std::move(*request));
+  shelf_layout_requests_.clear();
+}
+
+void WindowManagerApplication::OnWillDestroyRootWindowController(
+    RootWindowController* controller) {
+  // TODO(msw): this isn't right, ownership should belong in WindowManager
+  // and/or RootWindowController. But this is temporary until we get rid of
+  // sysui.
+  shelf_layout_.reset();
+  user_window_controller_.reset();
 }
 
 }  // namespace mus
 }  // namespace ash