Reland: Implement Aura side of unified touch text selection for contents

ui/views/touchui/touch_selection_menu_runner_views.cc

+// Copyright 2014 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 "ui/views/touchui/touch_selection_menu_runner_views.h"
+
+#include "ui/aura/window.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/geometry/size.h"
+
+namespace views {
+
+TouchSelectionMenuRunnerViews::TouchSelectionMenuRunnerViews()
+    : menu_(nullptr),
+      client_(nullptr) {
+  SetInstance(this);
+}
+
+TouchSelectionMenuRunnerViews::~TouchSelectionMenuRunnerViews() {
+  SetInstance(nullptr);
+}
+
+void TouchSelectionMenuRunnerViews::RunMenu(
+    ui::TouchSelectionMenuClient* client,
+    const gfx::Rect& anchor_rect,
+    const gfx::Size& handle_image_size,
+    aura::Window* context) {
+  CloseMenu();
+
+  DCHECK(!menu_);
+  DCHECK(!client_);
+
+  client_ = client;
+  menu_ = TouchEditingMenuView::Create(this, anchor_rect, handle_image_size,
+                                       context);
+
+  if (!menu_)
+    client_ = nullptr;
+}
+
+void TouchSelectionMenuRunnerViews::CloseMenu() {
+  if (menu_) {
+    menu_->Close();
+    menu_ = nullptr;
+    client_ = nullptr;
+  }
+}
+
+bool TouchSelectionMenuRunnerViews::IsRunning() const {
+  return menu_ != nullptr;
+}
+
+bool TouchSelectionMenuRunnerViews::IsCommandIdEnabled(int command_id) const {
+  return client_->IsCommandIdEnabled(command_id);
+}
+
+void TouchSelectionMenuRunnerViews::ExecuteCommand(int command_id,
+                                                   int event_flags) {
+  return client_->ExecuteCommand(command_id, event_flags);
+}
+
+void TouchSelectionMenuRunnerViews::OpenContextMenu() {
+  return client_->OpenContextMenu();
+}
+
+void TouchSelectionMenuRunnerViews::OnMenuClosed(TouchEditingMenuView* menu) {
+  DCHECK(menu == menu_); // or nullptr?
+  menu_ = nullptr;
+  client_ = nullptr;
+}
+
+}  // namespace views