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lightning-sunbird  0.9+nobinonly
nsMenuBoxObject.cpp
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is Mozilla Communicator client code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Original Author: David W. Hyatt (hyatt@netscape.com)
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either of the GNU General Public License Version 2 or later (the "GPL"),
00027  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
00030  * under the terms of either the GPL or the LGPL, and not to allow others to
00031  * use your version of this file under the terms of the MPL, indicate your
00032  * decision by deleting the provisions above and replace them with the notice
00033  * and other provisions required by the GPL or the LGPL. If you do not delete
00034  * the provisions above, a recipient may use your version of this file under
00035  * the terms of any one of the MPL, the GPL or the LGPL.
00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 #include "nsISupportsUtils.h"
00039 #include "nsIMenuBoxObject.h"
00040 #include "nsBoxObject.h"
00041 #include "nsIPresShell.h"
00042 #include "nsIMenuFrame.h"
00043 #include "nsIFrame.h"
00044 #include "nsGUIEvent.h"
00045 #include "nsIDOMNSUIEvent.h"
00046 #include "nsMenuBarListener.h"
00047 #include "nsPopupSetFrame.h"
00048 
00049 class nsMenuBoxObject : public nsIMenuBoxObject, public nsBoxObject
00050 {
00051 public:
00052   NS_DECL_ISUPPORTS
00053   NS_DECL_NSIMENUBOXOBJECT
00054 
00055   nsMenuBoxObject();
00056   virtual ~nsMenuBoxObject();
00057   
00058 protected:
00059 };
00060 
00061 /* Implementation file */
00062 NS_IMPL_ADDREF(nsMenuBoxObject)
00063 NS_IMPL_RELEASE(nsMenuBoxObject)
00064 
00065 NS_IMETHODIMP 
00066 nsMenuBoxObject::QueryInterface(REFNSIID iid, void** aResult)
00067 {
00068   if (!aResult)
00069     return NS_ERROR_NULL_POINTER;
00070   
00071   if (iid.Equals(NS_GET_IID(nsIMenuBoxObject))) {
00072     *aResult = (nsIMenuBoxObject*)this;
00073     NS_ADDREF(this);
00074     return NS_OK;
00075   }
00076 
00077   return nsBoxObject::QueryInterface(iid, aResult);
00078 }
00079   
00080 nsMenuBoxObject::nsMenuBoxObject()
00081 {
00082 }
00083 
00084 nsMenuBoxObject::~nsMenuBoxObject()
00085 {
00086   /* destructor code */
00087 }
00088 
00089 /* void openMenu (in boolean openFlag); */
00090 NS_IMETHODIMP nsMenuBoxObject::OpenMenu(PRBool aOpenFlag)
00091 {
00092   nsIFrame* frame = GetFrame();
00093   if (!frame)
00094     return NS_OK;
00095 
00096   if (!nsPopupSetFrame::MayOpenPopup(frame))
00097     return NS_OK;
00098 
00099   nsIMenuFrame* menuFrame;
00100   CallQueryInterface(frame, &menuFrame);
00101   if (!menuFrame)
00102     return NS_OK;
00103 
00104   return menuFrame->OpenMenu(aOpenFlag);
00105 }
00106 
00107 NS_IMETHODIMP nsMenuBoxObject::GetActiveChild(nsIDOMElement** aResult)
00108 {
00109   *aResult = nsnull;
00110   nsIFrame* frame = GetFrame();
00111   if (!frame)
00112     return NS_OK;
00113 
00114   nsIMenuFrame* menuFrame;
00115   CallQueryInterface(frame, &menuFrame);
00116   if (menuFrame)
00117     menuFrame->GetActiveChild(aResult);
00118   return NS_OK;
00119 }
00120 
00121 NS_IMETHODIMP nsMenuBoxObject::SetActiveChild(nsIDOMElement* aResult)
00122 {
00123   nsIFrame* frame = GetFrame();
00124   if (!frame)
00125     return NS_OK;
00126 
00127   nsIMenuFrame* menuFrame;
00128   CallQueryInterface(frame, &menuFrame);
00129   if (menuFrame) {
00130     menuFrame->MarkAsGenerated();
00131     menuFrame->SetActiveChild(aResult);
00132   }
00133   return NS_OK;
00134 }
00135 
00136 /* boolean handleKeyPress (in nsIDOMKeyEvent keyEvent); */
00137 NS_IMETHODIMP nsMenuBoxObject::HandleKeyPress(nsIDOMKeyEvent* aKeyEvent, PRBool* aHandledFlag)
00138 {
00139   *aHandledFlag = PR_FALSE;
00140   NS_ENSURE_ARG(aKeyEvent);
00141 
00142   // if event has already been handled, bail
00143   nsCOMPtr<nsIDOMNSUIEvent> uiEvent(do_QueryInterface(aKeyEvent));
00144   if (!uiEvent)
00145     return NS_OK;
00146 
00147   PRBool eventHandled = PR_FALSE;
00148   uiEvent->GetPreventDefault(&eventHandled);
00149   if (eventHandled)
00150     return NS_OK;
00151 
00152   if (nsMenuBarListener::IsAccessKeyPressed(aKeyEvent))
00153     return NS_OK;
00154 
00155   nsIFrame* frame = GetFrame();
00156   if (!frame)
00157     return NS_OK;
00158 
00159   nsIMenuFrame* menuFrame;
00160   CallQueryInterface(frame, &menuFrame);
00161   if (!menuFrame)
00162     return NS_OK;
00163 
00164   PRUint32 keyCode;
00165   aKeyEvent->GetKeyCode(&keyCode);
00166   switch (keyCode) {
00167     case NS_VK_UP:
00168     case NS_VK_DOWN:
00169     case NS_VK_HOME:
00170     case NS_VK_END:
00171       return menuFrame->KeyboardNavigation(keyCode, *aHandledFlag);
00172     default:
00173       return menuFrame->ShortcutNavigation(aKeyEvent, *aHandledFlag);
00174   }
00175 }
00176 
00177 // Creation Routine ///////////////////////////////////////////////////////////////////////
00178 
00179 nsresult
00180 NS_NewMenuBoxObject(nsIBoxObject** aResult)
00181 {
00182   *aResult = new nsMenuBoxObject;
00183   if (!*aResult)
00184     return NS_ERROR_OUT_OF_MEMORY;
00185   NS_ADDREF(*aResult);
00186   return NS_OK;
00187 }
00188