// Copyright 2017 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.

module ash.mojom;

import "ash/public/interfaces/ime_info.mojom";
import "ui/base/ime/chromeos/public/interfaces/ime_keyset.mojom";

// Interface for ash client (e.g. Chrome) to send input method info to ash.
interface ImeController {
  // Sets the client interface.
  SetClient(ImeControllerClient client);

  // Updates the cached IME information and refreshes the IME menus.
  // |current_ime_id| is empty when there is no active IME yet.
  RefreshIme(string current_ime_id,
             array<ImeInfo> available_imes,
             array<ImeMenuItem> menu_items);

  // Shows an icon in the IME menu indicating that IMEs are controlled by device
  // policy.
  SetImesManagedByPolicy(bool managed);

  // Shows the IME menu on the shelf instead of inside the system tray menu.
  // Users with multiple IMEs that have multiple configurable properties (e.g.
  // some Chinese IMEs) prefer this to keeping the IME menu under the primary
  // system tray menu.
  ShowImeMenuOnShelf(bool show);

  // Report caps lock state changes from chrome (which is the source of truth)
  // to the tray.
  UpdateCapsLockState(bool enabled);

  // Report keyboard layout changes from chrome (which is the source of truth)
  // This is also called when a connection is first established between
  // ImeController and ImeControllerClient.
  // The layout name is a XKB keyboard layout name (e.g. "us").
  OnKeyboardLayoutNameChanged(string layout_name);

  // Report the enabled state of the various extra input options (currently
  // emoji, handwriting, and voice input). |is_extra_input_options_enabled| set
  // to false will disable all extra input option UI regardless of the enabled
  // state of the individual options (which will be ingored).
  SetExtraInputOptionsEnabledState(bool is_extra_input_options_enabled,
                                   bool is_emoji_enabled,
                                   bool is_handwriting_enabled,
                                   bool is_voice_enabled);
};

// Interface for ash to send input method requests to its client (e.g. Chrome).
interface ImeControllerClient {
  // Switches to the next input method. Does nothing if only one input method
  // is installed.
  SwitchToNextIme();

  // Switches to the previous input method. Does nothing if only one input
  // method is installed.
  SwitchToPreviousIme();

  // Switches to an input method by |id|. Does nothing if the input method is
  // not installed. The ID is usually the output of a call like
  // chromeos::extension_ime_util::GetInputMethodIDByEngineID("xkb:jp::jpn"),
  // see that function for details. Shows a bubble with the input method short
  // name when |show_message| is true.
  SwitchImeById(string id, bool show_message);

  // Activates an input method menu item. The |key| must be a value from the
  // ImeMenuItems provided via RefreshIme. Does nothing if the |key| is invalid.
  ActivateImeMenuItem(string key);

  // When the caps lock state change originates from the tray (i.e. clicking the
  // caps lock toggle from the settings menu from the caps lock icon), from an
  // accelerator (e.g. pressing Alt + Search), or from the debug UI (i.e.
  // toggling the caps lock button), propagate the change to the client without
  // sending a change notification back.
  // TODO(crbug/759435): Ideally this interaction should only be to disable the
  // caps lock.
  SetCapsLockEnabled(bool enabled);

  // Overrides the keyboard keyset (emoji, handwriting or voice). If keyset is
  // 'kNone', we switch to the default keyset. Because this is asynchronous,
  // any code that needs the keyset to be updated first must use the callback.
  OverrideKeyboardKeyset(chromeos.input_method.mojom.ImeKeyset keyset) => ();
};