[MacViews] Implemented text context menu

ui/base/cocoa/text_services_context_menu.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 "ui/base/cocoa/text_services_context_menu.h"
+
+#include <utility>
+
+#include <ApplicationServices/ApplicationServices.h>
+#include <CoreAudio/CoreAudio.h>
+
+#include "base/strings/sys_string_conversions.h"
+#include "base/strings/utf_string_conversions.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/strings/grit/ui_strings.h"
+
+namespace {
+
+// The speech channel used for speaking.
+SpeechChannel speechChannel;
+
+// The menu index of the look up item.
+int kLookUpMenuIndex = 0;
+
+// Returns the TextDirection associated associated with the given
+// BiDi |command_id|.
+base::i18n::TextDirection GetTextDirectionFromCommandId(int command_id) {
+  switch (command_id) {
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_DEFAULT:
+      return base::i18n::TextDirection::UNKNOWN_DIRECTION;
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_LTR:
+      return base::i18n::TextDirection::LEFT_TO_RIGHT;
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_RTL:
+      return base::i18n::TextDirection::RIGHT_TO_LEFT;
+    default:
+      NOTREACHED();
+      return base::i18n::TextDirection::UNKNOWN_DIRECTION;
+  }
+}
+}
+
+namespace ui {
+
+//////////////////////////////////////////////////////////////////
+// TextServicesContextMenu, public:
+
+TextServicesContextMenu::TextServicesContextMenu(Delegate* delegate)
+    : speech_submenu_model_(this),
+      bidi_submenu_model_(this),
+      delegate_(delegate) {
+  DCHECK(delegate);
+
+  // Add items to the speech submenu.
+  speech_submenu_model_.AddItemWithStringId(IDS_SPEECH_START_SPEAKING_MAC,
+                                            IDS_SPEECH_START_SPEAKING_MAC);
+  speech_submenu_model_.AddItemWithStringId(IDS_SPEECH_STOP_SPEAKING_MAC,
+                                            IDS_SPEECH_STOP_SPEAKING_MAC);
+
+  // Add items to the BiDi submenu.
+  bidi_submenu_model_.AddCheckItem(
+      IDS_CONTENT_CONTEXT_WRITING_DIRECTION_DEFAULT,
+      l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_WRITING_DIRECTION_DEFAULT));
+  bidi_submenu_model_.AddCheckItem(
+      IDS_CONTENT_CONTEXT_WRITING_DIRECTION_LTR,
+      l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_WRITING_DIRECTION_LTR));
+  bidi_submenu_model_.AddCheckItem(
+      IDS_CONTENT_CONTEXT_WRITING_DIRECTION_RTL,
+      l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_WRITING_DIRECTION_RTL));
+}
+
+void TextServicesContextMenu::SpeakText(const base::string16& text) {
+  if (IsSpeaking())
+    StopSpeaking();
+
+  NewSpeechChannel(nullptr, &speechChannel);
+  SpeakCFString(speechChannel, SysUTF16ToCFStringRef(text), nullptr);
+}
+
+void TextServicesContextMenu::StopSpeaking() {
+  StopSpeechAt(speechChannel, kImmediate);
+  DisposeSpeechChannel(speechChannel);
+}
+
+bool TextServicesContextMenu::IsSpeaking() {
+  return SpeechBusy();
+}
+
+void TextServicesContextMenu::AppendToContextMenu(SimpleMenuModel* model) {
+  base::string16 printable_selection_text = delegate_->GetSelectedText();
+  if (printable_selection_text.empty())
+    return;
+
+  if (delegate_->IsLookUpAvailable()) {
+    model->InsertItemAt(kLookUpMenuIndex, IDS_CONTENT_CONTEXT_LOOK_UP,
+                        l10n_util::GetStringFUTF16(IDS_CONTENT_CONTEXT_LOOK_UP,
+                                                   printable_selection_text));
+    model->InsertSeparatorAt(kLookUpMenuIndex + 1, NORMAL_SEPARATOR);
+  }
+
+  model->AddSeparator(NORMAL_SEPARATOR);
+
+  model->AddSubMenu(IDS_SPEECH_MAC, l10n_util::GetStringUTF16(IDS_SPEECH_MAC),
+                    &speech_submenu_model_);
+  model->AddSubMenu(
+      IDS_CONTENT_CONTEXT_WRITING_DIRECTION_MENU,
+      l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_WRITING_DIRECTION_MENU),
+      &bidi_submenu_model_);
+}
+
+bool TextServicesContextMenu::IsTextServicesCommandId(int command_id) const {
+  switch (command_id) {
+    case IDS_SPEECH_START_SPEAKING_MAC:
+    case IDS_SPEECH_STOP_SPEAKING_MAC:
+    case IDS_CONTENT_CONTEXT_LOOK_UP:
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_DEFAULT:
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_LTR:
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_RTL:
+      return true;
+  }
+
+  return false;
+}
+
+//////////////////////////////////////////////////////////////////
+// TextServicesContextMenu::SimpleMenuModel::Delegate:
+
+void TextServicesContextMenu::ExecuteCommand(int command_id, int event_flags) {
+  switch (command_id) {
+    case IDS_SPEECH_START_SPEAKING_MAC:
+      delegate_->OnSpeakRequested();
+      break;
+    case IDS_SPEECH_STOP_SPEAKING_MAC:
+      StopSpeaking();
+      break;
+    case IDS_CONTENT_CONTEXT_LOOK_UP:
+      delegate_->LookUpInDictionary();
+      break;
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_DEFAULT:
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_LTR:
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_RTL:
+      delegate_->UpdateTextDirection(GetTextDirectionFromCommandId(command_id));
+      break;
+    default:
+      NOTREACHED();
+  }
+}
+
+bool TextServicesContextMenu::IsCommandIdChecked(int command_id) const {
+  switch (command_id) {
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_DEFAULT:
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_LTR:
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_RTL:
+      return delegate_->IsTextDirectionChecked(
+          GetTextDirectionFromCommandId(command_id));
+  }
+  return false;
+}
+
+bool TextServicesContextMenu::IsCommandIdEnabled(int command_id) const {
+  switch (command_id) {
+    case IDS_SPEECH_START_SPEAKING_MAC:
+    case IDS_CONTENT_CONTEXT_LOOK_UP:
+      // This is OK because the menu is not shown when it isn't
+      // appropriate.
+      return true;
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_DEFAULT:
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_LTR:
+    case IDS_CONTENT_CONTEXT_WRITING_DIRECTION_RTL:
+      return delegate_->IsTextDirectionEnabled(
+          GetTextDirectionFromCommandId(command_id));
+    case IDS_SPEECH_STOP_SPEAKING_MAC:
+      return IsSpeaking();
+  }
+
+  NOTREACHED();
+  return false;
+}
+
+}  // namespace ui