[MacViews] Implemented text context menu

ui/views/controls/views_text_services_context_menu_mac.mm

+// 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 "ui/views/controls/views_text_services_context_menu.h"
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/memory/ptr_util.h"
+#include "ui/base/cocoa/text_services_context_menu.h"

[msw, 2017/01/26 20:59:16]

nit: I think this belongs at the top (like textfield.h in textfield.cc)

[spqchan, 2017/02/01 00:32:39]

Done.

+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/models/simple_menu_model.h"
+#include "ui/gfx/decorated_text.h"
+#import "ui/gfx/decorated_text_mac.h"
+#include "ui/strings/grit/ui_strings.h"
+#include "ui/views/controls/textfield/textfield.h"
+#include "ui/views/view.h"
+#include "ui/views/widget/widget.h"
+
+namespace views {
+
+namespace {
+
+// The menu index for "Look Up".
+constexpr int kLookupMenuIndex = 0;

[msw, 2017/01/26 20:59:16]

optional nit: put this in the ctor (only used there)

[spqchan, 2017/02/01 00:32:38]

Done.

+
+// This class serves as a bridge to TextServicesContextMenu to add and handle
+// text service items in the context menu. The items include Speech, Look Up
+// and BiDi.
+class ViewsTextServicesContextMenuMac
+    : public ViewsTextServicesContextMenu,
+      public ui::TextServicesContextMenu::Delegate {
+ public:
+  ViewsTextServicesContextMenuMac(ui::SimpleMenuModel* menu, Textfield* client);

[msw, 2017/01/26 20:59:16]

optional nit: define all these methods inline

[spqchan, 2017/02/01 00:32:38]

Done.

+  ~ViewsTextServicesContextMenuMac() override;
+
+  // Handler for the "Look Up" menu item.
+  void LookUpInDictionary();
+
+  // ViewTextServicesContextMenu:
+  bool HandlesCommandId(int command_id) const override;
+  bool IsCommandIdChecked(int command_id) const override;
+  bool IsCommandIdEnabled(int command_id) const override;
+  void ExecuteCommand(int command_id, int event_flags) override;
+  bool IsTextDirectionItemChecked(
+      base::i18n::TextDirection direction) const override;
+
+  // TextServicesContextMenu::Delegate:
+  base::string16 GetSelectedText() const override;
+  bool IsTextDirectionEnabled(
+      base::i18n::TextDirection direction) const override;
+  bool IsTextDirectionChecked(
+      base::i18n::TextDirection direction) const override;
+  void UpdateTextDirection(base::i18n::TextDirection direction) override;
+
+ private:
+  // Appends and handles the text service menu.
+  ui::TextServicesContextMenu menu_;
+
+  // The view associated with the menu. Weak. Owns |this|.
+  Textfield* client_;
+
+  DISALLOW_COPY_AND_ASSIGN(ViewsTextServicesContextMenuMac);
+};
+
+ViewsTextServicesContextMenuMac::ViewsTextServicesContextMenuMac(
+    ui::SimpleMenuModel* menu,
+    Textfield* client)
+    : menu_(this), client_(client) {
+  base::string16 text = GetSelectedText();
+  if (!text.empty()) {
+    menu->InsertItemAt(
+        kLookupMenuIndex, IDS_CONTENT_CONTEXT_LOOK_UP,
+        l10n_util::GetStringFUTF16(IDS_CONTENT_CONTEXT_LOOK_UP, text));
+    menu->InsertSeparatorAt(kLookupMenuIndex + 1, ui::NORMAL_SEPARATOR);
+  }
+  menu_.AppendToContextMenu(menu);
+}
+
+ViewsTextServicesContextMenuMac::~ViewsTextServicesContextMenuMac() {}
+
+void ViewsTextServicesContextMenuMac::LookUpInDictionary() {
+  gfx::Point baseline_point;
+  gfx::DecoratedText text;
+  if (client_->GetDecoratedTextAndBaselineFromSelection(&text,
+                                                        &baseline_point)) {
+    Widget* widget = client_->GetWidget();
+    gfx::NativeView view = widget->GetNativeView();
+    views::View::ConvertPointToTarget(client_, widget->GetRootView(),
+                                      &baseline_point);
+
+    NSPoint lookup_point = NSMakePoint(
+        baseline_point.x(), NSHeight([view frame]) - baseline_point.y());
+    [view showDefinitionForAttributedString:
+              gfx::GetAttributedStringFromDecoratedText(text)
+                                    atPoint:lookup_point];
+  }
+}
+
+bool ViewsTextServicesContextMenuMac::HandlesCommandId(int command_id) const {
+  return command_id == IDS_CONTENT_CONTEXT_LOOK_UP;
+}
+
+bool ViewsTextServicesContextMenuMac::IsCommandIdChecked(int command_id) const {
+  DCHECK_EQ(IDS_CONTENT_CONTEXT_LOOK_UP, command_id);
+  return false;
+}
+
+bool ViewsTextServicesContextMenuMac::IsCommandIdEnabled(int command_id) const {
+  DCHECK_EQ(IDS_CONTENT_CONTEXT_LOOK_UP, command_id);
+  return true;
+}
+
+void ViewsTextServicesContextMenuMac::ExecuteCommand(int command_id,
+                                                     int event_flags) {
+  DCHECK_EQ(IDS_CONTENT_CONTEXT_LOOK_UP, command_id);
+  LookUpInDictionary();
+}
+
+bool ViewsTextServicesContextMenuMac::IsTextDirectionItemChecked(
+    base::i18n::TextDirection direction) const {
+  return IsTextDirectionChecked(direction);
+}
+
+base::string16 ViewsTextServicesContextMenuMac::GetSelectedText() const {
+  return client_->GetSelectedText();
+}
+
+bool ViewsTextServicesContextMenuMac::IsTextDirectionEnabled(
+    base::i18n::TextDirection direction) const {
+  return direction != base::i18n::UNKNOWN_DIRECTION;
+}
+
+bool ViewsTextServicesContextMenuMac::IsTextDirectionChecked(
+    base::i18n::TextDirection direction) const {
+  switch (direction) {

[msw, 2017/01/26 20:59:16]

optional nit: return direction != base::i18n::UNKNOWN_DIRECTION &&
client_->GetTextDirection() == direction;

[spqchan, 2017/02/01 00:32:38]

Done.

+    case base::i18n::UNKNOWN_DIRECTION:
+      return false;
+    case base::i18n::RIGHT_TO_LEFT:
+      return client_->GetTextDirection() == base::i18n::RIGHT_TO_LEFT;
+    case base::i18n::LEFT_TO_RIGHT:
+      return client_->GetTextDirection() == base::i18n::LEFT_TO_RIGHT;
+  }
+}
+
+void ViewsTextServicesContextMenuMac::UpdateTextDirection(
+    base::i18n::TextDirection direction) {
+  DCHECK_NE(direction, base::i18n::UNKNOWN_DIRECTION);
+
+  base::i18n::TextDirection text_direction =
+      direction == base::i18n::LEFT_TO_RIGHT ? base::i18n::LEFT_TO_RIGHT
+                                             : base::i18n::RIGHT_TO_LEFT;
+  client_->ChangeTextDirectionAndLayoutAlignment(text_direction);
+}
+
+}  // namespace
+
+// static
+std::unique_ptr<ViewsTextServicesContextMenu>
+ViewsTextServicesContextMenu::Create(ui::SimpleMenuModel* menu,
+                                     Textfield* client) {
+  return base::MakeUnique<ViewsTextServicesContextMenuMac>(menu, client);
+}
+
+}  // namespace views