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nsXBLPrototypeHandler.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Original Author: David W. Hyatt (hyatt@netscape.com)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsCOMPtr.h"
#include "nsXBLPrototypeHandler.h"
#include "nsXBLPrototypeBinding.h"
#include "nsContentUtils.h"
#include "nsIContent.h"
#include "nsIAtom.h"
#include "nsIDOMKeyEvent.h"
#include "nsIDOMMouseEvent.h"
#include "nsINameSpaceManager.h"
#include "nsIScriptContext.h"
#include "nsIScriptGlobalObject.h"
#include "nsIDocument.h"
#include "nsIDOMDocument.h"
#include "nsIJSEventListener.h"
#include "nsIController.h"
#include "nsIControllers.h"
#include "nsIDOMXULElement.h"
#include "nsIDOMNSUIEvent.h"
#include "nsIURI.h"
#include "nsIDOMNSHTMLTextAreaElement.h"
#include "nsIDOMNSHTMLInputElement.h"
#include "nsIDOMText.h"
#include "nsIFocusController.h"
#include "nsIEventListenerManager.h"
#include "nsIDOMEventReceiver.h"
#include "nsIDOMEventListener.h"
#include "nsIPrivateDOMEvent.h"
#include "nsIDOMNSEvent.h"
#include "nsPIDOMWindow.h"
#include "nsPIWindowRoot.h"
#include "nsIDOMWindowInternal.h"
#include "nsIServiceManager.h"
#include "nsXPIDLString.h"
#include "nsReadableUtils.h"
#include "nsXULAtoms.h"
#include "nsXBLAtoms.h"
#include "nsLayoutAtoms.h"
#include "nsGUIEvent.h"
#include "nsIXPConnect.h"
#include "nsIDOMScriptObjectFactory.h"
#include "nsDOMCID.h"
#include "nsUnicharUtils.h"
#include "nsReadableUtils.h"
#include "nsCRT.h"
#include "nsXBLEventHandler.h"
#include "nsHTMLAtoms.h"
#include "nsIBoxObject.h"
#include "nsIDOMNSDocument.h"

static NS_DEFINE_CID(kDOMScriptObjectFactoryCID,
                     NS_DOM_SCRIPT_OBJECT_FACTORY_CID);

PRUint32 nsXBLPrototypeHandler::gRefCnt = 0;

PRInt32 nsXBLPrototypeHandler::kMenuAccessKey = -1;
PRInt32 nsXBLPrototypeHandler::kAccelKey = -1;

const PRInt32 nsXBLPrototypeHandler::cShift = (1<<0);
const PRInt32 nsXBLPrototypeHandler::cAlt = (1<<1);
const PRInt32 nsXBLPrototypeHandler::cControl = (1<<2);
const PRInt32 nsXBLPrototypeHandler::cMeta = (1<<3);

const PRInt32 nsXBLPrototypeHandler::cShiftMask = (1<<4);
const PRInt32 nsXBLPrototypeHandler::cAltMask = (1<<5);
const PRInt32 nsXBLPrototypeHandler::cControlMask = (1<<6);
const PRInt32 nsXBLPrototypeHandler::cMetaMask = (1<<7);

const PRInt32 nsXBLPrototypeHandler::cAllModifiers = cShiftMask | cAltMask | cControlMask | cMetaMask;

nsXBLPrototypeHandler::nsXBLPrototypeHandler(const PRUnichar* aEvent,
                                             const PRUnichar* aPhase,
                                             const PRUnichar* aAction,
                                             const PRUnichar* aCommand,
                                             const PRUnichar* aKeyCode,
                                             const PRUnichar* aCharCode,
                                             const PRUnichar* aModifiers,
                                             const PRUnichar* aButton,
                                             const PRUnichar* aClickCount,
                                             const PRUnichar* aGroup,
                                             const PRUnichar* aPreventDefault,
                                             const PRUnichar* aAllowUntrusted,
                                             nsXBLPrototypeBinding* aBinding)
  : mHandlerText(nsnull),
    mLineNumber(0),
    mNextHandler(nsnull),
    mPrototypeBinding(aBinding)
{
  ++gRefCnt;
  if (gRefCnt == 1)
    // Get the primary accelerator key.
    InitAccessKeys();

  ConstructPrototype(nsnull, aEvent, aPhase, aAction, aCommand, aKeyCode,
                     aCharCode, aModifiers, aButton, aClickCount,
                     aGroup, aPreventDefault, aAllowUntrusted);
}

nsXBLPrototypeHandler::nsXBLPrototypeHandler(nsIContent* aHandlerElement)
  : mBoxObjectForHandlerElement(nsnull),
    mLineNumber(0),
    mNextHandler(nsnull),
    mPrototypeBinding(nsnull)
{
  ++gRefCnt;
  if (gRefCnt == 1)
    // Get the primary accelerator key.
    InitAccessKeys();

  // Make sure our prototype is initialized.
  ConstructPrototype(aHandlerElement);
}

nsXBLPrototypeHandler::~nsXBLPrototypeHandler()
{
  --gRefCnt;
  if (mType & NS_HANDLER_TYPE_XUL) {
    NS_IF_RELEASE(mBoxObjectForHandlerElement);
  } else if (mHandlerText) {
    nsMemory::Free(mHandlerText);
  }

  // We own the next handler in the chain, so delete it now.
  delete mNextHandler;
}

already_AddRefed<nsIContent>
nsXBLPrototypeHandler::GetHandlerElement()
{
  if (!mBoxObjectForHandlerElement || !(mType & NS_HANDLER_TYPE_XUL)) {
    return nsnull;
  }
  nsCOMPtr<nsIDOMElement> element;
  mBoxObjectForHandlerElement->GetElement(getter_AddRefs(element));
  nsCOMPtr<nsIContent> content = do_QueryInterface(element);
  nsIContent* handler = nsnull;
  content.swap(handler);
  return handler;
}

void
nsXBLPrototypeHandler::AppendHandlerText(const nsAString& aText) 
{
  if (mHandlerText) {
    // Append our text to the existing text.
    PRUnichar* temp = mHandlerText;
    mHandlerText = ToNewUnicode(nsDependentString(temp) + aText);
    nsMemory::Free(temp);
  }
  else
    mHandlerText = ToNewUnicode(aText);
}

/////////////////////////////////////////////////////////////////////////////
// Get the menu access key from prefs.
// XXX Eventually pick up using CSS3 key-equivalent property or somesuch
void
nsXBLPrototypeHandler::InitAccessKeys()
{
  if (kAccelKey >= 0 && kMenuAccessKey >= 0)
    return;

  // Compiled-in defaults, in case we can't get the pref --
  // mac doesn't have menu shortcuts, other platforms use alt.
#if defined(XP_MAC) || defined(XP_MACOSX)
  kMenuAccessKey = 0;
  kAccelKey = nsIDOMKeyEvent::DOM_VK_META;
#else
  kMenuAccessKey = nsIDOMKeyEvent::DOM_VK_ALT;
  kAccelKey = nsIDOMKeyEvent::DOM_VK_CONTROL;
#endif

  // Get the menu access key value from prefs, overriding the default:
  kMenuAccessKey =
    nsContentUtils::GetIntPref("ui.key.menuAccessKey", kMenuAccessKey);
  kAccelKey = nsContentUtils::GetIntPref("ui.key.accelKey", kAccelKey);
}

nsresult
nsXBLPrototypeHandler::ExecuteHandler(nsIDOMEventReceiver* aReceiver,
                                      nsIDOMEvent* aEvent)
{
  nsresult rv = NS_ERROR_FAILURE;

  // Prevent default action?
  if (mType & NS_HANDLER_TYPE_PREVENTDEFAULT) {
    aEvent->PreventDefault();
    // If we prevent default, then it's okay for
    // mBoxObjectForHandlerElement and mHandlerText to be null
    rv = NS_OK;
  }

  if (!mBoxObjectForHandlerElement) // This works for both types of handlers.  In both cases, the union's var should be defined.
    return rv;

  // See if our event receiver is a content node (and not us).
  PRBool isXULKey = (mType & NS_HANDLER_TYPE_XUL);
  PRBool isXBLCommand = (mType & NS_HANDLER_TYPE_XBL_COMMAND);

  // XUL handlers and commands shouldn't be triggered by non-trusted
  // events.
  if (isXULKey || isXBLCommand) {
    nsCOMPtr<nsIDOMNSEvent> domNSEvent = do_QueryInterface(aEvent);
    PRBool trustedEvent = PR_FALSE;
    if (domNSEvent) {
      domNSEvent->GetIsTrusted(&trustedEvent);
    }

    if (!trustedEvent)
      return NS_OK;
  }
    
  PRBool isReceiverCommandElement = PR_FALSE;
  nsCOMPtr<nsIContent> content(do_QueryInterface(aReceiver));
  nsCOMPtr<nsIContent> handlerElement = GetHandlerElement();
  if (isXULKey && content && content != handlerElement)
    isReceiverCommandElement = PR_TRUE;

  // This is a special-case optimization to make command handling fast.
  // It isn't really a part of XBL, but it helps speed things up.
  if (isXBLCommand && !isReceiverCommandElement) {
    // See if preventDefault has been set.  If so, don't execute.
    PRBool preventDefault;
    nsCOMPtr<nsIDOMNSUIEvent> nsUIEvent(do_QueryInterface(aEvent));
    if (nsUIEvent)
      nsUIEvent->GetPreventDefault(&preventDefault);

    if (preventDefault)
      return NS_OK;

    nsCOMPtr<nsIPrivateDOMEvent> privateEvent = do_QueryInterface(aEvent);
    if (privateEvent) {
      PRBool dispatchStopped;
      privateEvent->IsDispatchStopped(&dispatchStopped);
      if (dispatchStopped)
        return NS_OK;
    }

    // Instead of executing JS, let's get the controller for the bound
    // element and call doCommand on it.
    nsCOMPtr<nsIController> controller;
    nsCOMPtr<nsIFocusController> focusController;

    nsCOMPtr<nsPIWindowRoot> windowRoot(do_QueryInterface(aReceiver));
    if (windowRoot) {
      windowRoot->GetFocusController(getter_AddRefs(focusController));
    }
    else {
      nsCOMPtr<nsPIDOMWindow> privateWindow(do_QueryInterface(aReceiver));
      if (!privateWindow) {
        nsCOMPtr<nsIContent> elt(do_QueryInterface(aReceiver));
        nsCOMPtr<nsIDocument> doc;
        if (elt)
          doc = elt->GetOwnerDoc();

        if (!doc)
          doc = do_QueryInterface(aReceiver);

        if (!doc)
          return NS_ERROR_FAILURE;

        privateWindow = do_QueryInterface(doc->GetScriptGlobalObject());
        if (!privateWindow)
          return NS_ERROR_FAILURE;
      }

      focusController = privateWindow->GetRootFocusController();
    }

    NS_LossyConvertUCS2toASCII command(mHandlerText);
    if (focusController)
      focusController->GetControllerForCommand(command.get(), getter_AddRefs(controller));
    else
      controller = GetController(aReceiver); // We're attached to the receiver possibly.

    nsAutoString type;
    mEventName->ToString(type);

    if (type.EqualsLiteral("keypress") &&
        mDetail == nsIDOMKeyEvent::DOM_VK_SPACE &&
        mMisc == 1) {
      // get the focused element so that we can pageDown only at
      // certain times.
      nsCOMPtr<nsIDOMElement> focusedElement;
      focusController->GetFocusedElement(getter_AddRefs(focusedElement));
      PRBool isLink = PR_FALSE;
      nsCOMPtr<nsIContent> focusedContent = do_QueryInterface(focusedElement);
      nsIContent *content = focusedContent;

      // if the focused element is a link then we do want space to
      // scroll down. focused element may be an element in a link,
      // we need to check the parent node too.
      if (focusedContent) {
        while (content) {
          if (content->Tag() == nsHTMLAtoms::a &&
              content->IsContentOfType(nsIContent::eHTML)) {
            isLink = PR_TRUE;
            break;
          }

          if (content->HasAttr(kNameSpaceID_XLink, nsHTMLAtoms::type)) {
            nsAutoString type;
            content->GetAttr(kNameSpaceID_XLink, nsHTMLAtoms::type, type);

            isLink = type.EqualsLiteral("simple");

            if (isLink) {
              break;
            }
          }

          content = content->GetParent();
        }

        if (!isLink)
          return NS_OK;
      }
    }

    // We are the default action for this command.
    // Stop any other default action from executing.
    aEvent->PreventDefault();
    
    if (controller)
      controller->DoCommand(command.get());

    return NS_OK;
  }

  // Look for a compiled handler on the element. 
  // Should be compiled and bound with "on" in front of the name.
  nsAutoString onEvent(NS_LITERAL_STRING("onxbl"));
  nsAutoString str;
  mEventName->ToString(str);
  onEvent += str;
  nsCOMPtr<nsIAtom> onEventAtom = do_GetAtom(onEvent);

  void* handler = nsnull;
  
  // Compile the event handler.
  nsAutoString xulText;
  nsIContent* keyCommandContent = nsnull;
  if (isXULKey) {
    // Try an oncommand attribute (used by XUL <key> elements, which
    // are implemented using this code).
    NS_ENSURE_STATE(handlerElement);
    handlerElement->GetAttr(kNameSpaceID_None, nsLayoutAtoms::oncommand, xulText);
    keyCommandContent = handlerElement;
    if (xulText.IsEmpty()) {
      // Maybe the receiver is a <command> elt.
      if (isReceiverCommandElement) {
        // It is!  See if it has an oncommand attribute.
        content->GetAttr(kNameSpaceID_None, nsLayoutAtoms::oncommand, xulText);
        keyCommandContent = content;
      }
      
      if (xulText.IsEmpty())
        return NS_ERROR_FAILURE; // For whatever reason, they didn't give us anything to do.
    }
  }
  
  if (isXULKey)
    aEvent->PreventDefault(); // Preventing default for XUL key handlers

  // Compile the handler and bind it to the element.
  nsCOMPtr<nsIScriptGlobalObject> boundGlobal;
  nsCOMPtr<nsPIWindowRoot> winRoot(do_QueryInterface(aReceiver));
  nsCOMPtr<nsIDOMWindowInternal> focusedWin;

  if (winRoot) {
    nsCOMPtr<nsIFocusController> focusController;
    winRoot->GetFocusController(getter_AddRefs(focusController));
    focusController->GetFocusedWindow(getter_AddRefs(focusedWin));
  }

  // if the focused window was found get our script global object from
  // that.
  if (focusedWin) {
    NS_ASSERTION(isXULKey, "We should only use the focused window for "
                 "XUL key handlers!");
    nsCOMPtr<nsPIDOMWindow> piWin(do_QueryInterface(focusedWin));

    if (piWin) {
      piWin = piWin->GetCurrentInnerWindow();
      NS_ENSURE_TRUE(piWin, NS_ERROR_UNEXPECTED);
    }

    boundGlobal = do_QueryInterface(piWin->GetPrivateRoot());
  }
  else boundGlobal = do_QueryInterface(aReceiver);

  if (!boundGlobal) {
    nsCOMPtr<nsIDocument> boundDocument(do_QueryInterface(aReceiver));
    if (!boundDocument) {
      // We must be an element.
      nsCOMPtr<nsIContent> content(do_QueryInterface(aReceiver));
      if (!content)
        return NS_OK;
      boundDocument = content->GetOwnerDoc();
      if (!boundDocument)
        return NS_OK;
    }

    boundGlobal = boundDocument->GetScriptGlobalObject();
  }

  // If we still don't have a 'boundGlobal', we're doomed. bug 95465.
  NS_ASSERTION(boundGlobal, "failed to get the nsIScriptGlobalObject. bug 95465?");
  if (!boundGlobal)
    return NS_OK;

  nsIScriptContext *boundContext = boundGlobal->GetContext();
  if (!boundContext) return NS_OK;

  JSObject* scriptObject = nsnull;

  // strong ref to a GC root we'll need to protect scriptObject in the case
  // where it is not the global object (!winRoot).
  nsCOMPtr<nsIXPConnectJSObjectHolder> wrapper;

  if (winRoot) {
    scriptObject = boundGlobal->GetGlobalJSObject();
  } else {
    JSObject *global = boundGlobal->GetGlobalJSObject();
    JSContext *cx = (JSContext *)boundContext->GetNativeContext();

    // XXX: Don't use the global object!
    rv = nsContentUtils::XPConnect()->WrapNative(cx, global, aReceiver,
                                                 NS_GET_IID(nsISupports),
                                                 getter_AddRefs(wrapper));
    NS_ENSURE_SUCCESS(rv, rv);

    rv = wrapper->GetJSObject(&scriptObject);
    NS_ENSURE_SUCCESS(rv, rv);
  }

  const char *eventName = nsContentUtils::GetEventArgName(kNameSpaceID_XBL);

  if (isXULKey) {
    nsCAutoString documentURI;
    keyCommandContent->GetOwnerDoc()->GetDocumentURI()->GetSpec(documentURI);
    rv = boundContext->CompileEventHandler(scriptObject, onEventAtom, eventName,
                                           xulText, documentURI.get(), 0, 
                                           PR_TRUE, &handler);
  }
  else {
    nsDependentString handlerText(mHandlerText);
    if (handlerText.IsEmpty())
      return NS_ERROR_FAILURE;
    
    nsCAutoString bindingURI;
    mPrototypeBinding->DocURI()->GetSpec(bindingURI);
    
    rv = boundContext->CompileEventHandler(scriptObject, onEventAtom, eventName,
                                           handlerText, bindingURI.get(),
                                           mLineNumber, PR_TRUE, &handler);
  }
  NS_ENSURE_SUCCESS(rv, rv);

  nsAutoGCRoot root(&handler, &rv);
  NS_ENSURE_SUCCESS(rv, rv);

  // Temporarily bind it to the bound element
  boundContext->BindCompiledEventHandler(scriptObject, onEventAtom, handler);

  // Execute it.
  nsCOMPtr<nsIDOMEventListener> eventListener;
  NS_NewJSEventListener(boundContext, boundGlobal->GetGlobalJSObject(),
                        aReceiver, getter_AddRefs(eventListener));

  nsCOMPtr<nsIJSEventListener> jsListener(do_QueryInterface(eventListener));
  jsListener->SetEventName(onEventAtom);
  
  // Handle the event.
  eventListener->HandleEvent(aEvent);
  return NS_OK;
}

already_AddRefed<nsIAtom>
nsXBLPrototypeHandler::GetEventName()
{
  nsIAtom* eventName = mEventName;
  NS_IF_ADDREF(eventName);
  return eventName;
}

already_AddRefed<nsIController>
nsXBLPrototypeHandler::GetController(nsIDOMEventReceiver* aReceiver)
{
  // XXX Fix this so there's a generic interface that describes controllers, 
  // This code should have no special knowledge of what objects might have controllers.
  nsCOMPtr<nsIControllers> controllers;

  nsCOMPtr<nsIDOMXULElement> xulElement(do_QueryInterface(aReceiver));
  if (xulElement)
    xulElement->GetControllers(getter_AddRefs(controllers));

  if (!controllers) {
    nsCOMPtr<nsIDOMNSHTMLTextAreaElement> htmlTextArea(do_QueryInterface(aReceiver));
    if (htmlTextArea)
      htmlTextArea->GetControllers(getter_AddRefs(controllers));
  }

  if (!controllers) {
    nsCOMPtr<nsIDOMNSHTMLInputElement> htmlInputElement(do_QueryInterface(aReceiver));
    if (htmlInputElement)
      htmlInputElement->GetControllers(getter_AddRefs(controllers));
  }

  if (!controllers) {
    nsCOMPtr<nsIDOMWindowInternal> domWindow(do_QueryInterface(aReceiver));
    if (domWindow)
      domWindow->GetControllers(getter_AddRefs(controllers));
  }

  // Return the first controller.
  // XXX This code should be checking the command name and using supportscommand and
  // iscommandenabled.
  nsIController* controller;
  if (controllers) {
    controllers->GetControllerAt(0, &controller);  // return reference
  }
  else controller = nsnull;

  return controller;
}

PRBool
nsXBLPrototypeHandler::KeyEventMatched(nsIDOMKeyEvent* aKeyEvent)
{
  if (mDetail == -1)
    return PR_TRUE; // No filters set up. It's generic.

  // Get the keycode or charcode of the key event.
  PRUint32 code;
  if (mMisc)
    aKeyEvent->GetCharCode(&code);
  else
    aKeyEvent->GetKeyCode(&code);

  if (code != PRUint32(mDetail))
    return PR_FALSE;

  return ModifiersMatchMask(aKeyEvent);
}

PRBool
nsXBLPrototypeHandler::MouseEventMatched(nsIDOMMouseEvent* aMouseEvent)
{
  if (mDetail == -1 && mMisc == 0 && (mKeyMask & cAllModifiers) == 0)
    return PR_TRUE; // No filters set up. It's generic.

  unsigned short button;
  aMouseEvent->GetButton(&button);
  if (mDetail != -1 && (button != mDetail))
    return PR_FALSE;

  PRInt32 clickcount;
  aMouseEvent->GetDetail(&clickcount);
  if (mMisc != 0 && (clickcount != mMisc))
    return PR_FALSE;

  return ModifiersMatchMask(aMouseEvent);
}

struct keyCodeData {
  const char* str;
  size_t strlength;
  PRUint32 keycode;
};

// All of these must be uppercase, since the function below does
// case-insensitive comparison by converting to uppercase.
// XXX: be sure to check this periodically for new symbol additions!
static const keyCodeData gKeyCodes[] = {

#define KEYCODE_ENTRY(str) {#str, sizeof(#str) - 1, nsIDOMKeyEvent::DOM_##str}
#define KEYCODE_ENTRY2(str, code) {str, sizeof(str) - 1, code}

  KEYCODE_ENTRY(VK_CANCEL),
  KEYCODE_ENTRY2("VK_BACK", nsIDOMKeyEvent::DOM_VK_BACK_SPACE),
  KEYCODE_ENTRY(VK_TAB),
  KEYCODE_ENTRY(VK_CLEAR),
  KEYCODE_ENTRY(VK_RETURN),
  KEYCODE_ENTRY(VK_ENTER),
  KEYCODE_ENTRY(VK_SHIFT),
  KEYCODE_ENTRY(VK_CONTROL),
  KEYCODE_ENTRY(VK_ALT),
  KEYCODE_ENTRY(VK_PAUSE),
  KEYCODE_ENTRY(VK_CAPS_LOCK),
  KEYCODE_ENTRY(VK_ESCAPE),
  KEYCODE_ENTRY(VK_SPACE),
  KEYCODE_ENTRY(VK_PAGE_UP),
  KEYCODE_ENTRY(VK_PAGE_DOWN),
  KEYCODE_ENTRY(VK_END),
  KEYCODE_ENTRY(VK_HOME),
  KEYCODE_ENTRY(VK_LEFT),
  KEYCODE_ENTRY(VK_UP),
  KEYCODE_ENTRY(VK_RIGHT),
  KEYCODE_ENTRY(VK_DOWN),
  KEYCODE_ENTRY(VK_PRINTSCREEN),
  KEYCODE_ENTRY(VK_INSERT),
  KEYCODE_ENTRY(VK_HELP),
  KEYCODE_ENTRY(VK_DELETE),
  KEYCODE_ENTRY(VK_0),
  KEYCODE_ENTRY(VK_1),
  KEYCODE_ENTRY(VK_2),
  KEYCODE_ENTRY(VK_3),
  KEYCODE_ENTRY(VK_4),
  KEYCODE_ENTRY(VK_5),
  KEYCODE_ENTRY(VK_6),
  KEYCODE_ENTRY(VK_7),
  KEYCODE_ENTRY(VK_8),
  KEYCODE_ENTRY(VK_9),
  KEYCODE_ENTRY(VK_SEMICOLON),
  KEYCODE_ENTRY(VK_EQUALS),
  KEYCODE_ENTRY(VK_A),
  KEYCODE_ENTRY(VK_B),
  KEYCODE_ENTRY(VK_C),
  KEYCODE_ENTRY(VK_D),
  KEYCODE_ENTRY(VK_E),
  KEYCODE_ENTRY(VK_F),
  KEYCODE_ENTRY(VK_G),
  KEYCODE_ENTRY(VK_H),
  KEYCODE_ENTRY(VK_I),
  KEYCODE_ENTRY(VK_J),
  KEYCODE_ENTRY(VK_K),
  KEYCODE_ENTRY(VK_L),
  KEYCODE_ENTRY(VK_M),
  KEYCODE_ENTRY(VK_N),
  KEYCODE_ENTRY(VK_O),
  KEYCODE_ENTRY(VK_P),
  KEYCODE_ENTRY(VK_Q),
  KEYCODE_ENTRY(VK_R),
  KEYCODE_ENTRY(VK_S),
  KEYCODE_ENTRY(VK_T),
  KEYCODE_ENTRY(VK_U),
  KEYCODE_ENTRY(VK_V),
  KEYCODE_ENTRY(VK_W),
  KEYCODE_ENTRY(VK_X),
  KEYCODE_ENTRY(VK_Y),
  KEYCODE_ENTRY(VK_Z),
  KEYCODE_ENTRY(VK_NUMPAD0),
  KEYCODE_ENTRY(VK_NUMPAD1),
  KEYCODE_ENTRY(VK_NUMPAD2),
  KEYCODE_ENTRY(VK_NUMPAD3),
  KEYCODE_ENTRY(VK_NUMPAD4),
  KEYCODE_ENTRY(VK_NUMPAD5),
  KEYCODE_ENTRY(VK_NUMPAD6),
  KEYCODE_ENTRY(VK_NUMPAD7),
  KEYCODE_ENTRY(VK_NUMPAD8),
  KEYCODE_ENTRY(VK_NUMPAD9),
  KEYCODE_ENTRY(VK_MULTIPLY),
  KEYCODE_ENTRY(VK_ADD),
  KEYCODE_ENTRY(VK_SEPARATOR),
  KEYCODE_ENTRY(VK_SUBTRACT),
  KEYCODE_ENTRY(VK_DECIMAL),
  KEYCODE_ENTRY(VK_DIVIDE),
  KEYCODE_ENTRY(VK_F1),
  KEYCODE_ENTRY(VK_F2),
  KEYCODE_ENTRY(VK_F3),
  KEYCODE_ENTRY(VK_F4),
  KEYCODE_ENTRY(VK_F5),
  KEYCODE_ENTRY(VK_F6),
  KEYCODE_ENTRY(VK_F7),
  KEYCODE_ENTRY(VK_F8),
  KEYCODE_ENTRY(VK_F9),
  KEYCODE_ENTRY(VK_F10),
  KEYCODE_ENTRY(VK_F11),
  KEYCODE_ENTRY(VK_F12),
  KEYCODE_ENTRY(VK_F13),
  KEYCODE_ENTRY(VK_F14),
  KEYCODE_ENTRY(VK_F15),
  KEYCODE_ENTRY(VK_F16),
  KEYCODE_ENTRY(VK_F17),
  KEYCODE_ENTRY(VK_F18),
  KEYCODE_ENTRY(VK_F19),
  KEYCODE_ENTRY(VK_F20),
  KEYCODE_ENTRY(VK_F21),
  KEYCODE_ENTRY(VK_F22),
  KEYCODE_ENTRY(VK_F23),
  KEYCODE_ENTRY(VK_F24),
  KEYCODE_ENTRY(VK_NUM_LOCK),
  KEYCODE_ENTRY(VK_SCROLL_LOCK),
  KEYCODE_ENTRY(VK_COMMA),
  KEYCODE_ENTRY(VK_PERIOD),
  KEYCODE_ENTRY(VK_SLASH),
  KEYCODE_ENTRY(VK_BACK_QUOTE),
  KEYCODE_ENTRY(VK_OPEN_BRACKET),
  KEYCODE_ENTRY(VK_BACK_SLASH),
  KEYCODE_ENTRY(VK_CLOSE_BRACKET),
  KEYCODE_ENTRY(VK_QUOTE)

#undef KEYCODE_ENTRY
#undef KEYCODE_ENTRY2

};

PRInt32 nsXBLPrototypeHandler::GetMatchingKeyCode(const nsAString& aKeyName)
{
  nsCAutoString keyName;
  keyName.AssignWithConversion(aKeyName);
  ToUpperCase(keyName); // We want case-insensitive comparison with data
                        // stored as uppercase.

  PRUint32 keyNameLength = keyName.Length();
  const char* keyNameStr = keyName.get();
  for (PRUint16 i = 0; i < (sizeof(gKeyCodes) / sizeof(gKeyCodes[0])); ++i)
    if (keyNameLength == gKeyCodes[i].strlength &&
        !nsCRT::strcmp(gKeyCodes[i].str, keyNameStr))
      return gKeyCodes[i].keycode;

  return 0;
}

PRInt32 nsXBLPrototypeHandler::KeyToMask(PRInt32 key)
{
  switch (key)
  {
    case nsIDOMKeyEvent::DOM_VK_META:
      return cMeta | cMetaMask;
      break;

    case nsIDOMKeyEvent::DOM_VK_ALT:
      return cAlt | cAltMask;
      break;

    case nsIDOMKeyEvent::DOM_VK_CONTROL:
    default:
      return cControl | cControlMask;
  }
  return cControl | cControlMask;  // for warning avoidance
}

void
nsXBLPrototypeHandler::GetEventType(nsAString& aEvent)
{
  nsCOMPtr<nsIContent> handlerElement = GetHandlerElement();
  if (!handlerElement) {
    aEvent.Truncate();
    return;
  }
  handlerElement->GetAttr(kNameSpaceID_None, nsXBLAtoms::event, aEvent);
  
  if (aEvent.IsEmpty() && (mType & NS_HANDLER_TYPE_XUL))
    // If no type is specified for a XUL <key> element, let's assume that we're "keypress".
    aEvent.AssignLiteral("keypress");
}

void
nsXBLPrototypeHandler::ConstructPrototype(nsIContent* aKeyElement, 
                                          const PRUnichar* aEvent,
                                          const PRUnichar* aPhase,
                                          const PRUnichar* aAction,
                                          const PRUnichar* aCommand,
                                          const PRUnichar* aKeyCode,
                                          const PRUnichar* aCharCode,
                                          const PRUnichar* aModifiers,
                                          const PRUnichar* aButton,
                                          const PRUnichar* aClickCount,
                                          const PRUnichar* aGroup,
                                          const PRUnichar* aPreventDefault,
                                          const PRUnichar* aAllowUntrusted)
{
  mType = 0;

  if (aKeyElement) {
    mType |= NS_HANDLER_TYPE_XUL;

    nsCOMPtr<nsIDOMNSDocument> nsDomDoc =
      do_QueryInterface(aKeyElement->GetOwnerDoc());
    if (nsDomDoc) {
      nsCOMPtr<nsIDOMElement> el = do_QueryInterface(aKeyElement);
      nsCOMPtr<nsIBoxObject> box;
      nsDomDoc->GetBoxObjectFor(el, getter_AddRefs(box));
      box.swap(mBoxObjectForHandlerElement);
      NS_WARN_IF_FALSE(mBoxObjectForHandlerElement,
                       "Couldn't get a box object for the key element!");
    }
  }
  else {
    mType |= aCommand ? NS_HANDLER_TYPE_XBL_COMMAND : NS_HANDLER_TYPE_XBL_JS;
    mHandlerText = nsnull;

    if (mPrototypeBinding && !mPrototypeBinding->IsChrome()) {
      mType |= NS_HANDLER_ALLOW_UNTRUSTED;
    }
  }

  mDetail = -1;
  mMisc = 0;
  mKeyMask = 0;
  mPhase = NS_PHASE_BUBBLING;

  if (aAction)
    mHandlerText = ToNewUnicode(nsDependentString(aAction));
  else if (aCommand)
    mHandlerText = ToNewUnicode(nsDependentString(aCommand));

  nsAutoString event(aEvent);
  if (event.IsEmpty()) {
    if (mType & NS_HANDLER_TYPE_XUL)
      GetEventType(event);
    if (event.IsEmpty())
      return;
  }

  mEventName = do_GetAtom(event);

  if (aPhase) {
    const nsDependentString phase(aPhase);
    if (phase.EqualsLiteral("capturing"))
      mPhase = NS_PHASE_CAPTURING;
    else if (phase.EqualsLiteral("target"))
      mPhase = NS_PHASE_TARGET;
  }

  // Button and clickcount apply only to XBL handlers and don't apply to XUL key
  // handlers.  
  if (aButton && *aButton)
    mDetail = *aButton - '0';

  if (aClickCount && *aClickCount)
    mMisc = *aClickCount - '0';

  // Modifiers are supported by both types of handlers (XUL and XBL).  
  nsAutoString modifiers(aModifiers);
  if (mType & NS_HANDLER_TYPE_XUL)
    aKeyElement->GetAttr(kNameSpaceID_None, nsXBLAtoms::modifiers, modifiers);
  
  if (!modifiers.IsEmpty()) {
    mKeyMask = cAllModifiers;
    char* str = ToNewCString(modifiers);
    char* newStr;
    char* token = nsCRT::strtok( str, ", ", &newStr );
    while( token != NULL ) {
      if (PL_strcmp(token, "shift") == 0)
        mKeyMask |= cShift | cShiftMask;
      else if (PL_strcmp(token, "alt") == 0)
        mKeyMask |= cAlt | cAltMask;
      else if (PL_strcmp(token, "meta") == 0)
        mKeyMask |= cMeta | cMetaMask;
      else if (PL_strcmp(token, "control") == 0)
        mKeyMask |= cControl | cControlMask;
      else if (PL_strcmp(token, "accel") == 0)
        mKeyMask |= KeyToMask(kAccelKey);
      else if (PL_strcmp(token, "access") == 0)
        mKeyMask |= KeyToMask(kMenuAccessKey);
      else if (PL_strcmp(token, "any") == 0)
        mKeyMask &= ~(mKeyMask << 4);
    
      token = nsCRT::strtok( newStr, ", ", &newStr );
    }

    nsMemory::Free(str);
  }

  nsAutoString key(aCharCode);
  if (key.IsEmpty()) {
    if (mType & NS_HANDLER_TYPE_XUL) {
      aKeyElement->GetAttr(kNameSpaceID_None, nsXBLAtoms::key, key);
      if (key.IsEmpty()) 
        aKeyElement->GetAttr(kNameSpaceID_None, nsXBLAtoms::charcode, key);
    }
  }

  if (!key.IsEmpty()) {
    if (mKeyMask == 0)
      mKeyMask = cAllModifiers;
    if (!(mKeyMask & cShift))
      mKeyMask &= ~cShiftMask;
    if ((mKeyMask & cShift) != 0)
      ToUpperCase(key);
    else
      ToLowerCase(key);

    // We have a charcode.
    mMisc = 1;
    mDetail = key[0];
  }
  else {
    key.Assign(aKeyCode);
    if (mType & NS_HANDLER_TYPE_XUL)
      aKeyElement->GetAttr(kNameSpaceID_None, nsXBLAtoms::keycode, key);
    
    if (!key.IsEmpty()) {
      if (mKeyMask == 0)
        mKeyMask = cAllModifiers;
      mDetail = GetMatchingKeyCode(key);
    }
  }

  if (aGroup && nsDependentString(aGroup).EqualsLiteral("system"))
    mType |= NS_HANDLER_TYPE_SYSTEM;

  nsAutoString preventDefault(aPreventDefault);
  if (preventDefault.EqualsLiteral("true"))
    mType |= NS_HANDLER_TYPE_PREVENTDEFAULT;

  if (aAllowUntrusted) {
    if (nsDependentString(aAllowUntrusted).EqualsLiteral("true")) {
      mType |= NS_HANDLER_ALLOW_UNTRUSTED;
    } else {
      mType &= ~NS_HANDLER_ALLOW_UNTRUSTED;
    }
  }
}

PRBool
nsXBLPrototypeHandler::ModifiersMatchMask(nsIDOMUIEvent* aEvent)
{
  nsCOMPtr<nsIDOMKeyEvent> key(do_QueryInterface(aEvent));
  nsCOMPtr<nsIDOMMouseEvent> mouse(do_QueryInterface(aEvent));

  PRBool keyPresent;
  if (mKeyMask & cMetaMask) {
    key ? key->GetMetaKey(&keyPresent) : mouse->GetMetaKey(&keyPresent);
    if (keyPresent != ((mKeyMask & cMeta) != 0))
      return PR_FALSE;
  }

  if (mKeyMask & cShiftMask) {
    key ? key->GetShiftKey(&keyPresent) : mouse->GetShiftKey(&keyPresent);
    if (keyPresent != ((mKeyMask & cShift) != 0))
      return PR_FALSE;
  }

  if (mKeyMask & cAltMask) {
    key ? key->GetAltKey(&keyPresent) : mouse->GetAltKey(&keyPresent);
    if (keyPresent != ((mKeyMask & cAlt) != 0))
      return PR_FALSE;
  }

  if (mKeyMask & cControlMask) {
    key ? key->GetCtrlKey(&keyPresent) : mouse->GetCtrlKey(&keyPresent);
    if (keyPresent != ((mKeyMask & cControl) != 0))
      return PR_FALSE;
  }

  return PR_TRUE;
}

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