gecko-dev/dom/xul/XULMenuElement.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/dom/KeyboardEvent.h"
#include "mozilla/dom/KeyboardEventBinding.h"
#include "mozilla/dom/Element.h"
#include "nsIFrame.h"
#include "nsMenuBarFrame.h"
#include "nsMenuBarListener.h"
#include "nsMenuFrame.h"
#include "nsMenuPopupFrame.h"
#include "mozilla/dom/XULMenuElement.h"
#include "mozilla/dom/XULMenuElementBinding.h"
#include "nsXULPopupManager.h"

namespace mozilla {
namespace dom {

JSObject* XULMenuElement::WrapNode(JSContext* aCx,
                                   JS::Handle<JSObject*> aGivenProto) {
  return XULMenuElement_Binding::Wrap(aCx, this, aGivenProto);
}

already_AddRefed<Element> XULMenuElement::GetActiveChild() {
  nsMenuFrame* menu = do_QueryFrame(GetPrimaryFrame(FlushType::Frames));
  if (menu) {
    RefPtr<Element> el;
    menu->GetActiveChild(getter_AddRefs(el));
    return el.forget();
  }
  return nullptr;
}

void XULMenuElement::SetActiveChild(Element* arg) {
  nsMenuFrame* menu = do_QueryFrame(GetPrimaryFrame(FlushType::Frames));
  if (menu) {
    menu->SetActiveChild(arg);
  }
}

bool XULMenuElement::HandleKeyPress(KeyboardEvent& keyEvent) {
  nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
  if (!pm) {
    return false;
  }

  // if event has already been handled, bail
  if (keyEvent.DefaultPrevented()) {
    return false;
  }

  if (nsMenuBarListener::IsAccessKeyPressed(&keyEvent)) return false;

  nsMenuFrame* menu = do_QueryFrame(GetPrimaryFrame(FlushType::Frames));
  if (!menu) {
    return false;
  }

  nsMenuPopupFrame* popupFrame = menu->GetPopup();
  if (!popupFrame) {
    return false;
  }

  uint32_t keyCode = keyEvent.KeyCode();
  switch (keyCode) {
    case KeyboardEvent_Binding::DOM_VK_UP:
    case KeyboardEvent_Binding::DOM_VK_DOWN:
    case KeyboardEvent_Binding::DOM_VK_HOME:
    case KeyboardEvent_Binding::DOM_VK_END: {
      nsNavigationDirection theDirection;
      theDirection = NS_DIRECTION_FROM_KEY_CODE(popupFrame, keyCode);
      return pm->HandleKeyboardNavigationInPopup(popupFrame, theDirection);
    }
    default:
      return pm->HandleShortcutNavigation(&keyEvent, popupFrame);
  }
}

bool XULMenuElement::OpenedWithKey() {
  nsMenuFrame* menuframe = do_QueryFrame(GetPrimaryFrame(FlushType::Frames));
  if (!menuframe) {
    return false;
  }

  nsIFrame* frame = menuframe->GetParent();
  while (frame) {
    nsMenuBarFrame* menubar = do_QueryFrame(frame);
    if (menubar) {
      return menubar->IsActiveByKeyboard();
    }
    frame = frame->GetParent();
  }
  return false;
}

}  // namespace dom
}  // namespace mozilla