tor-browser

The Tor Browser
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XULMenuElement.cpp (2501B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "mozilla/dom/XULMenuElement.h"
      8 
      9 #include "mozilla/StaticAnalysisFunctions.h"
     10 #include "mozilla/dom/KeyboardEvent.h"
     11 #include "mozilla/dom/KeyboardEventBinding.h"
     12 #include "mozilla/dom/XULButtonElement.h"
     13 #include "mozilla/dom/XULMenuElementBinding.h"
     14 #include "mozilla/dom/XULPopupElement.h"
     15 #include "nsMenuPopupFrame.h"
     16 #include "nsXULPopupManager.h"
     17 
     18 namespace mozilla::dom {
     19 
     20 JSObject* XULMenuElement::WrapNode(JSContext* aCx,
     21                                   JS::Handle<JSObject*> aGivenProto) {
     22  return XULMenuElement_Binding::Wrap(aCx, this, aGivenProto);
     23 }
     24 
     25 Element* XULMenuElement::GetActiveMenuChild() {
     26  RefPtr popup = GetMenuPopupContent();
     27  return popup ? popup->GetActiveMenuChild() : nullptr;
     28 }
     29 
     30 void XULMenuElement::SetActiveMenuChild(Element* aChild) {
     31  RefPtr popup = GetMenuPopupContent();
     32  if (NS_WARN_IF(!popup)) {
     33    return;
     34  }
     35 
     36  if (!aChild) {
     37    popup->SetActiveMenuChild(nullptr);
     38    return;
     39  }
     40  auto* button = XULButtonElement::FromNode(aChild);
     41  if (NS_WARN_IF(!button) || NS_WARN_IF(!button->IsMenu())) {
     42    return;
     43  }
     44  // KnownLive because it's aChild.
     45  popup->SetActiveMenuChild(MOZ_KnownLive(button));
     46 }
     47 
     48 bool XULButtonElement::HandleKeyPress(KeyboardEvent& keyEvent) {
     49  RefPtr<nsXULPopupManager> pm = nsXULPopupManager::GetInstance();
     50  if (!pm) {
     51    return false;
     52  }
     53 
     54  // if event has already been handled, bail
     55  if (keyEvent.DefaultPrevented()) {
     56    return false;
     57  }
     58 
     59  if (keyEvent.IsMenuAccessKeyPressed()) {
     60    return false;
     61  }
     62 
     63  nsMenuPopupFrame* popupFrame = GetMenuPopup(FlushType::Frames);
     64  if (NS_WARN_IF(!popupFrame)) {
     65    return false;
     66  }
     67 
     68  uint32_t keyCode = keyEvent.KeyCode();
     69  switch (keyCode) {
     70    case KeyboardEvent_Binding::DOM_VK_UP:
     71    case KeyboardEvent_Binding::DOM_VK_DOWN:
     72    case KeyboardEvent_Binding::DOM_VK_HOME:
     73    case KeyboardEvent_Binding::DOM_VK_END: {
     74      nsNavigationDirection theDirection;
     75      theDirection = NS_DIRECTION_FROM_KEY_CODE(popupFrame, keyCode);
     76      return pm->HandleKeyboardNavigationInPopup(popupFrame, theDirection);
     77    }
     78    default:
     79      return pm->HandleShortcutNavigation(keyEvent, popupFrame);
     80  }
     81 }
     82 
     83 }  // namespace mozilla::dom