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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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 the Mozilla browser.
*
* The Initial Developer of the Original Code is Netscape
* Communications, Inc. Portions created by Netscape are
* Copyright (C) 1999, Mozilla. All Rights Reserved.
*
* Contributor(s):
* Adam Lock <adamlock@netscape.com>
*/
#include "nsCommandHandler.h"
#include "nsWebBrowser.h"
#include "nsDocShellTreeOwner.h"
#include "nsIAllocator.h"
#include "nsIScriptGlobalObject.h"
nsCommandHandler::nsCommandHandler() :
mWindow(nsnull)
{
}
nsCommandHandler::~nsCommandHandler()
{
}
nsresult nsCommandHandler::GetCommandHandler(nsICommandHandler **aCommandHandler)
{
NS_ENSURE_ARG_POINTER(aCommandHandler);
*aCommandHandler = nsnull;
if (mWindow == nsnull)
{
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIScriptGlobalObject> globalObj( do_QueryInterface(mWindow) );
if (!globalObj)
{
return NS_ERROR_FAILURE;
}
// Get the document tree owner
nsCOMPtr<nsIDocShellTreeItem> docShellAsTreeItem =
do_QueryInterface(globalObj->GetDocShell());
nsIDocShellTreeOwner *treeOwner = nsnull;
docShellAsTreeItem->GetTreeOwner(&treeOwner);
// Make sure the tree owner is an an nsDocShellTreeOwner object
// by QI'ing for a hidden interface. If it doesn't have the interface
// then it's not safe to do the casting.
nsCOMPtr<nsICDocShellTreeOwner> realTreeOwner(do_QueryInterface(treeOwner));
if (realTreeOwner)
{
nsDocShellTreeOwner *tree = NS_STATIC_CAST(nsDocShellTreeOwner *, treeOwner);
if (tree->mTreeOwner)
{
nsresult rv;
rv = tree->mTreeOwner->QueryInterface(NS_GET_IID(nsICommandHandler), (void **)aCommandHandler);
NS_RELEASE(treeOwner);
return rv;
}
NS_RELEASE(treeOwner);
}
*aCommandHandler = nsnull;
return NS_OK;
}
NS_IMPL_ADDREF(nsCommandHandler)
NS_IMPL_RELEASE(nsCommandHandler)
NS_INTERFACE_MAP_BEGIN(nsCommandHandler)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsICommandHandler)
NS_INTERFACE_MAP_ENTRY(nsICommandHandlerInit)
NS_INTERFACE_MAP_ENTRY(nsICommandHandler)
NS_INTERFACE_MAP_END
///////////////////////////////////////////////////////////////////////////////
// nsICommandHandlerInit implementation
/* attribute nsIDocShell docShell; */
NS_IMETHODIMP nsCommandHandler::GetWindow(nsIDOMWindow * *aWindow)
{
*aWindow = nsnull;
return NS_OK;
}
NS_IMETHODIMP nsCommandHandler::SetWindow(nsIDOMWindow * aWindow)
{
if (aWindow == nsnull)
{
return NS_ERROR_FAILURE;
}
mWindow = aWindow;
return NS_OK;
}
///////////////////////////////////////////////////////////////////////////////
// nsICommandHandler implementation
/* string exec (in string aCommand, in string aStatus); */
NS_IMETHODIMP nsCommandHandler::Exec(const char *aCommand, const char *aStatus, char **aResult)
{
NS_ENSURE_ARG_POINTER(aCommand);
NS_ENSURE_ARG_POINTER(aResult);
nsCOMPtr<nsICommandHandler> commandHandler;
GetCommandHandler(getter_AddRefs(commandHandler));
// Call the client's command handler to deal with this command
if (commandHandler)
{
*aResult = nsnull;
return commandHandler->Exec(aCommand, aStatus, aResult);
}
// Return an empty string
const char szEmpty[] = "";
*aResult = (char *) nsAllocator::Clone(szEmpty, sizeof(szEmpty));
return NS_OK;
}
/* string query (in string aCommand, in string aStatus); */
NS_IMETHODIMP nsCommandHandler::Query(const char *aCommand, const char *aStatus, char **aResult)
{
NS_ENSURE_ARG_POINTER(aCommand);
NS_ENSURE_ARG_POINTER(aResult);
nsCOMPtr<nsICommandHandler> commandHandler;
GetCommandHandler(getter_AddRefs(commandHandler));
// Call the client's command handler to deal with this command
if (commandHandler)
{
*aResult = nsnull;
return commandHandler->Query(aCommand, aStatus, aResult);
}
// Return an empty string
const char szEmpty[] = "";
*aResult = (char *) nsAllocator::Clone(szEmpty, sizeof(szEmpty));
return NS_OK;
}
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