dom/xul/XULMenuElement.cpp

   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 #include "mozilla/StaticAnalysisFunctions.h"
   9 #include "mozilla/dom/XULButtonElement.h"
  10 #include "mozilla/dom/XULMenuElementBinding.h"
  11 #include "mozilla/dom/XULPopupElement.h"
  12 #include "mozilla/dom/KeyboardEvent.h"
  13 #include "mozilla/dom/KeyboardEventBinding.h"
  14 #include "nsXULPopupManager.h"
  15 #include "nsMenuPopupFrame.h"
  16
  17 namespace mozilla::dom {
  18
  19 JSObject* XULMenuElement::WrapNode(JSContext* aCx,
  20                                    JS::Handle<JSObject*> aGivenProto) {
  21   return XULMenuElement_Binding::Wrap(aCx, this, aGivenProto);
  22 }
  23
  24 Element* XULMenuElement::GetActiveMenuChild() {
  25   RefPtr popup = GetMenuPopupContent();
  26   return popup ? popup->GetActiveMenuChild() : nullptr;
  27 }
  28
  29 void XULMenuElement::SetActiveMenuChild(Element* aChild) {
  30   RefPtr popup = GetMenuPopupContent();
  31   if (NS_WARN_IF(!popup)) {
  32     return;
  33   }
  34
  35   if (!aChild) {
  36     popup->SetActiveMenuChild(nullptr);
  37     return;
  38   }
  39   auto* button = XULButtonElement::FromNode(aChild);
  40   if (NS_WARN_IF(!button) || NS_WARN_IF(!button->IsMenu())) {
  41     return;
  42   }
  43   // KnownLive because it's aChild.
  44   popup->SetActiveMenuChild(MOZ_KnownLive(button));
  45 }
  46
  47 bool XULButtonElement::HandleKeyPress(KeyboardEvent& keyEvent) {
  48   RefPtr<nsXULPopupManager> pm = nsXULPopupManager::GetInstance();
  49   if (!pm) {
  50     return false;
  51   }
  52
  53   // if event has already been handled, bail
  54   if (keyEvent.DefaultPrevented()) {
  55     return false;
  56   }
  57
  58   if (keyEvent.IsMenuAccessKeyPressed()) {
  59     return false;
  60   }
  61
  62   nsMenuPopupFrame* popupFrame = GetMenuPopup(FlushType::Frames);
  63   if (NS_WARN_IF(!popupFrame)) {
  64     return false;
  65   }
  66
  67   uint32_t keyCode = keyEvent.KeyCode();
  68   switch (keyCode) {
  69     case KeyboardEvent_Binding::DOM_VK_UP:
  70     case KeyboardEvent_Binding::DOM_VK_DOWN:
  71     case KeyboardEvent_Binding::DOM_VK_HOME:
  72     case KeyboardEvent_Binding::DOM_VK_END: {
  73       nsNavigationDirection theDirection;
  74       theDirection = NS_DIRECTION_FROM_KEY_CODE(popupFrame, keyCode);
  75       return pm->HandleKeyboardNavigationInPopup(popupFrame, theDirection);
  76     }
  77     default:
  78       return pm->HandleShortcutNavigation(keyEvent, popupFrame);
  79   }
  80 }
  81
  82 }  // namespace mozilla::dom