gecko-dev/embedding/components/commandhandler/src/nsBaseCommandController.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * 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
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 *
 * 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) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
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 * either 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
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#include "nsString.h"
#include "nsIComponentManager.h"
#include "nsBaseCommandController.h"

#include "nsHashtable.h"
#include "nsString.h"
#include "nsWeakPtr.h"

NS_IMPL_ADDREF(nsBaseCommandController)
NS_IMPL_RELEASE(nsBaseCommandController)

NS_INTERFACE_MAP_BEGIN(nsBaseCommandController)
  NS_INTERFACE_MAP_ENTRY(nsIController)
  NS_INTERFACE_MAP_ENTRY(nsICommandController)
  NS_INTERFACE_MAP_ENTRY(nsIControllerContext)
  NS_INTERFACE_MAP_ENTRY(nsIInterfaceRequestor)
  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIControllerContext)
NS_INTERFACE_MAP_END

nsBaseCommandController::nsBaseCommandController()
{
}

nsBaseCommandController::~nsBaseCommandController()
{
}

NS_IMETHODIMP
nsBaseCommandController::Init(nsIControllerCommandTable *aCommandTable)
{
  nsresult rv = NS_OK;

  if (aCommandTable)
    mCommandTable = aCommandTable;    // owning addref
  else
    mCommandTable = do_CreateInstance(NS_CONTROLLERCOMMANDTABLE_CONTRACTID, &rv);
  
  return rv;
}

NS_IMETHODIMP
nsBaseCommandController::SetCommandContext(nsISupports *aCommandContext)
{
  mCommandContext = do_GetWeakReference(aCommandContext);
  return NS_OK;
}

NS_IMETHODIMP
nsBaseCommandController::GetInterface(const nsIID & aIID, void * *result)
{
  NS_ENSURE_ARG_POINTER(result);

  if (NS_SUCCEEDED(QueryInterface(aIID, result)))
    return NS_OK;

  if (aIID.Equals(NS_GET_IID(nsIControllerCommandTable)))
  {
    if (mCommandTable)
      return mCommandTable->QueryInterface(aIID, result);
    return NS_ERROR_NOT_INITIALIZED;
  }
    
  return NS_NOINTERFACE;
}



/* =======================================================================
 * nsIController
 * ======================================================================= */

NS_IMETHODIMP
nsBaseCommandController::IsCommandEnabled(const char *aCommand,
                                          PRBool *aResult)
{
  NS_ENSURE_ARG_POINTER(aCommand);
  NS_ENSURE_ARG_POINTER(aResult);
  NS_ENSURE_STATE(mCommandTable);
  nsCOMPtr<nsISupports> context = do_QueryReferent(mCommandContext);
  return mCommandTable->IsCommandEnabled(aCommand, context, aResult);
}

NS_IMETHODIMP
nsBaseCommandController::SupportsCommand(const char *aCommand, PRBool *aResult)
{
  NS_ENSURE_ARG_POINTER(aCommand);
  NS_ENSURE_ARG_POINTER(aResult);
  NS_ENSURE_STATE(mCommandTable);
  nsCOMPtr<nsISupports> context = do_QueryReferent(mCommandContext);
  return mCommandTable->SupportsCommand(aCommand, context, aResult);
}

NS_IMETHODIMP
nsBaseCommandController::DoCommand(const char *aCommand)
{
  NS_ENSURE_ARG_POINTER(aCommand);
  NS_ENSURE_STATE(mCommandTable);
  nsCOMPtr<nsISupports> context = do_QueryReferent(mCommandContext);
  return mCommandTable->DoCommand(aCommand, context);
}

NS_IMETHODIMP
nsBaseCommandController::DoCommandWithParams(const char *aCommand,
                                             nsICommandParams *aParams)
{
  NS_ENSURE_ARG_POINTER(aCommand);
  NS_ENSURE_STATE(mCommandTable);
  nsCOMPtr<nsISupports> context = do_QueryReferent(mCommandContext);
  return mCommandTable->DoCommandParams(aCommand, aParams, context);
}

NS_IMETHODIMP
nsBaseCommandController::GetCommandStateWithParams(const char *aCommand,
                                                   nsICommandParams *aParams)
{
  NS_ENSURE_ARG_POINTER(aCommand);
  NS_ENSURE_STATE(mCommandTable);
  nsCOMPtr<nsISupports> context = do_QueryReferent(mCommandContext);
  return mCommandTable->GetCommandState(aCommand, aParams, context);
}

NS_IMETHODIMP
nsBaseCommandController::OnEvent(const char * aEventName)
{
  NS_ENSURE_ARG_POINTER(aEventName);
  return NS_OK;
}