ash/public/interfaces/event_rewriter_controller.mojom

// Copyright 2018 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 "ui/events/mojo/event.mojom";

// Allows a client to implement spoken feedback features; used for ChromeVox.
interface SpokenFeedbackEventRewriterDelegate {
  // Used to send key events to the ChromeVox extension. |capture| is true if
  // the rewriter discarded the event, false if the rewriter continues event
  // propagation.
  DispatchKeyEventToChromeVox(ui.mojom.Event event, bool capture);

  // Used to send mouse events to the ChromeVox extension.
  DispatchMouseEventToChromeVox(ui.mojom.Event event);
};

// Allows clients to toggle some event rewriting behavior.
interface EventRewriterController {
  // Enables the KeyboardDrivenEventRewriter, which is disabled by default.
  // This only applies when the user is on the login screen.
  SetKeyboardDrivenEventRewriterEnabled(bool enabled);

  // If true, Shift + Arrow keys are rewritten to Tab/Shift-Tab keys.
  // This only applies when the KeyboardDrivenEventRewriter is active.
  SetArrowToTabRewritingEnabled(bool enabled);

  // Set the delegate used by the spoken feedback event rewriter.
  SetSpokenFeedbackEventRewriterDelegate(
      SpokenFeedbackEventRewriterDelegate delegate);

  // Continue dispatch of key events that were unhandled by ChromeVox.
  // TODO(crbug.com/839541): ChromeVox should not repost unhandled events.
  OnUnhandledSpokenFeedbackEvent(ui.mojom.Event event);

  // Discards key events and sends to spoken feedback when true.
  CaptureAllKeysForSpokenFeedback(bool capture);

  // Sends mouse events to ChromeVox when true.
  SetSendMouseEventsToDelegate(bool value);
};