ui/accessibility/platform/atk_util_auralinux_x11.cc

// 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.

#include <atk/atk.h>

#include "ui/accessibility/platform/atk_util_auralinux.h"
#include "ui/events/x/events_x_utils.h"

namespace ui {

// static
DiscardAtkKeyEvent AtkUtilAuraLinux::HandleKeyEvent(XEvent* xevent) {
  if (!GetInstance()->ShouldEnableAccessibility())
    return DiscardAtkKeyEvent::Retain;

  AtkKeyEventStruct atk_key_event;
  if (xevent->type == KeyPress)
    atk_key_event.type = ATK_KEY_EVENT_PRESS;
  else if (xevent->type == KeyRelease)
    atk_key_event.type = ATK_KEY_EVENT_RELEASE;
  else
    NOTREACHED() << xevent->type;

  XKeyEvent& xkey = xevent->xkey;
  KeySym keysym = NoSymbol;
  XLookupString(&xkey, nullptr, 0, &keysym, nullptr);

  atk_key_event.state = xkey.state;
  atk_key_event.keyval = keysym;
  atk_key_event.keycode = xkey.keycode;
  atk_key_event.timestamp = xkey.time;

  // This string property matches the one that was removed from GdkEventKey. In
  // the future, ATK clients should no longer rely on it, so we set it to null.
  atk_key_event.string = nullptr;
  atk_key_event.length = 0;

  int flags = ui::EventFlagsFromXEvent(*xevent);
  if (flags & ui::EF_SHIFT_DOWN)
    atk_key_event.state |= AtkKeyModifierMask::kAtkShiftMask;
  if (flags & ui::EF_CAPS_LOCK_ON)
    atk_key_event.state |= AtkKeyModifierMask::kAtkLockMask;
  if (flags & ui::EF_CONTROL_DOWN)
    atk_key_event.state |= AtkKeyModifierMask::kAtkControlMask;
  if (flags & ui::EF_ALT_DOWN)
    atk_key_event.state |= AtkKeyModifierMask::kAtkMod1Mask;
  if (flags & ui::EF_NUM_LOCK_ON)
    atk_key_event.state |= AtkKeyModifierMask::kAtkMod2Mask;
  if (flags & ui::EF_MOD3_DOWN)
    atk_key_event.state |= AtkKeyModifierMask::kAtkMod3Mask;
  if (flags & ui::EF_COMMAND_DOWN)
    atk_key_event.state |= AtkKeyModifierMask::kAtkMod4Mask;
  if (flags & ui::EF_ALTGR_DOWN)
    atk_key_event.state |= AtkKeyModifierMask::KAtkMod5Mask;

  return HandleAtkKeyEvent(&atk_key_event);
}

}  // namespace ui