mash: Port context menu code to WmShell and WmRootWindowController.

ash/common/wm_root_window_controller.cc

 // Copyright 2016 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/common/wm_root_window_controller.h"
 
 #include "ash/common/session/session_state_delegate.h"
+#include "ash/common/shelf/wm_shelf.h"
+#include "ash/common/shell_delegate.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/wallpaper/wallpaper_delegate.h"
 #include "ash/common/wallpaper/wallpaper_widget_controller.h"
 #include "ash/common/wm/container_finder.h"
 #include "ash/common/wm/root_window_layout_manager.h"
 #include "ash/common/wm/system_modal_container_layout_manager.h"
 #include "ash/common/wm/workspace/workspace_layout_manager.h"
 #include "ash/common/wm/workspace_controller.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
 #include "base/memory/ptr_util.h"
+#include "ui/base/models/menu_model.h"
+#include "ui/views/controls/menu/menu_model_adapter.h"
+#include "ui/views/controls/menu/menu_runner.h"
 
 namespace ash {
 namespace {
 
 // Creates a new window for use as a container.
 WmWindow* CreateContainer(int window_id, const char* name, WmWindow* parent) {
   WmWindow* window = WmShell::Get()->NewWindow(ui::wm::WINDOW_TYPE_UNKNOWN,
                                                ui::LAYER_NOT_DRAWN);
   window->SetShellWindowId(window_id);
   window->SetName(name);
@@ skipping 55 matching lines @@
 }
 
 WmWindow* WmRootWindowController::GetContainer(int container_id) {
   return root_->GetChildByShellWindowId(container_id);
 }
 
 const WmWindow* WmRootWindowController::GetContainer(int container_id) const {
   return root_->GetChildByShellWindowId(container_id);
 }
 
+void WmRootWindowController::ShowContextMenu(
+    const gfx::Point& location_in_screen,
+    ui::MenuSourceType source_type) {
+  ShellDelegate* delegate = WmShell::Get()->delegate();
+  DCHECK(delegate);
+  menu_model_.reset(delegate->CreateContextMenu(GetShelf(), nullptr));
+  if (!menu_model_)
+    return;
+
+  menu_model_adapter_.reset(new views::MenuModelAdapter(
+      menu_model_.get(), base::Bind(&WmRootWindowController::OnMenuClosed,
+                                    base::Unretained(this))));
+
+  // The wallpaper controller may not be set yet if the user clicked on the
+  // status area before the initial animation completion. See crbug.com/222218
+  if (!wallpaper_widget_controller())
+    return;
+
+  menu_runner_.reset(new views::MenuRunner(
+      menu_model_adapter_->CreateMenu(),
+      views::MenuRunner::CONTEXT_MENU | views::MenuRunner::ASYNC));
+  ignore_result(
+      menu_runner_->RunMenuAt(wallpaper_widget_controller()->widget(), nullptr,
+                              gfx::Rect(location_in_screen, gfx::Size()),
+                              views::MENU_ANCHOR_TOPLEFT, source_type));
+}
+
 void WmRootWindowController::OnInitialWallpaperAnimationStarted() {}
 
 void WmRootWindowController::OnWallpaperAnimationFinished(
     views::Widget* widget) {
   WmShell::Get()->wallpaper_delegate()->OnWallpaperAnimationFinished();
   // Only removes old component when wallpaper animation finished. If we
   // remove the old one before the new wallpaper is done fading in there will
   // be a white flash during the animation.
   if (animating_wallpaper_widget_controller()) {
     WallpaperWidgetController* controller =
@@ skipping 199 matching lines @@
   DCHECK(lock_modal_container);
   lock_modal_container->SetLayoutManager(
       base::MakeUnique<SystemModalContainerLayoutManager>(
           lock_modal_container));
 }
 
 void WmRootWindowController::DeleteWorkspaceController() {
   workspace_controller_.reset();
 }
 
+void WmRootWindowController::OnMenuClosed() {
+  menu_runner_.reset();
+  menu_model_adapter_.reset();
+  menu_model_.reset();
+  GetShelf()->UpdateVisibilityState();
+}
+
 }  // namespace ash