248 lines
7.3 KiB
C++
248 lines
7.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Simon Fraser <sfraser@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsString.h"
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#include "nsIControllerCommand.h"
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#include "nsControllerCommandTable.h"
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// prototype;
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nsresult
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NS_NewControllerCommandTable(nsIControllerCommandTable** aResult);
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// this value is used to size the hash table. Just a sensible upper bound
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#define NUM_COMMANDS_BOUNDS 64
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nsControllerCommandTable::nsControllerCommandTable()
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: mCommandsTable(NUM_COMMANDS_BOUNDS, PR_FALSE)
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, mMutable(PR_TRUE)
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{
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}
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nsControllerCommandTable::~nsControllerCommandTable()
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{
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}
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NS_IMPL_ISUPPORTS2(nsControllerCommandTable, nsIControllerCommandTable, nsISupportsWeakReference)
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NS_IMETHODIMP
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nsControllerCommandTable::MakeImmutable(void)
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{
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mMutable = PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsControllerCommandTable::RegisterCommand(const char * aCommandName, nsIControllerCommand *aCommand)
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{
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NS_ENSURE_TRUE(mMutable, NS_ERROR_FAILURE);
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nsCStringKey commandKey(aCommandName);
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if (mCommandsTable.Put(&commandKey, aCommand))
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{
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#if DEBUG
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NS_WARNING("Replacing existing command -- ");
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#endif
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsControllerCommandTable::UnregisterCommand(const char * aCommandName, nsIControllerCommand *aCommand)
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{
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NS_ENSURE_TRUE(mMutable, NS_ERROR_FAILURE);
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nsCStringKey commandKey(aCommandName);
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PRBool wasRemoved = mCommandsTable.Remove(&commandKey);
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return wasRemoved ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsControllerCommandTable::FindCommandHandler(const char * aCommandName, nsIControllerCommand **outCommand)
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{
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NS_ENSURE_ARG_POINTER(outCommand);
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*outCommand = NULL;
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nsCStringKey commandKey(aCommandName);
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nsISupports* foundCommand = mCommandsTable.Get(&commandKey);
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if (!foundCommand) return NS_ERROR_FAILURE;
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// no need to addref since the .Get does it for us
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*outCommand = reinterpret_cast<nsIControllerCommand*>(foundCommand);
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return NS_OK;
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}
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/* boolean isCommandEnabled (in wstring command); */
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NS_IMETHODIMP
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nsControllerCommandTable::IsCommandEnabled(const char * aCommandName, nsISupports *aCommandRefCon, PRBool *aResult)
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{
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NS_ENSURE_ARG_POINTER(aResult);
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*aResult = PR_FALSE;
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// find the command
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nsCOMPtr<nsIControllerCommand> commandHandler;
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FindCommandHandler(aCommandName, getter_AddRefs(commandHandler));
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if (!commandHandler)
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{
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#if DEBUG
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NS_WARNING("Controller command table asked about a command that it does not handle -- ");
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#endif
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return NS_OK; // we don't handle this command
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}
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return commandHandler->IsCommandEnabled(aCommandName, aCommandRefCon, aResult);
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}
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NS_IMETHODIMP
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nsControllerCommandTable::UpdateCommandState(const char * aCommandName, nsISupports *aCommandRefCon)
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{
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// find the command
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nsCOMPtr<nsIControllerCommand> commandHandler;
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FindCommandHandler(aCommandName, getter_AddRefs(commandHandler));
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if (!commandHandler)
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{
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#if DEBUG
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NS_WARNING("Controller command table asked to update the state of a command that it does not handle -- ");
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#endif
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return NS_OK; // we don't handle this command
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}
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsControllerCommandTable::SupportsCommand(const char * aCommandName, nsISupports *aCommandRefCon, PRBool *aResult)
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{
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NS_ENSURE_ARG_POINTER(aResult);
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// XXX: need to check the readonly and disabled states
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*aResult = PR_FALSE;
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// find the command
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nsCOMPtr<nsIControllerCommand> commandHandler;
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FindCommandHandler(aCommandName, getter_AddRefs(commandHandler));
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*aResult = (commandHandler.get() != nsnull);
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return NS_OK;
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}
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/* void doCommand (in wstring command); */
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NS_IMETHODIMP
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nsControllerCommandTable::DoCommand(const char * aCommandName, nsISupports *aCommandRefCon)
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{
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// find the command
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nsCOMPtr<nsIControllerCommand> commandHandler;
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FindCommandHandler(aCommandName, getter_AddRefs(commandHandler));
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if (!commandHandler)
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{
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#if DEBUG
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NS_WARNING("Controller command table asked to do a command that it does not handle -- ");
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#endif
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return NS_OK; // we don't handle this command
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}
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return commandHandler->DoCommand(aCommandName, aCommandRefCon);
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}
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NS_IMETHODIMP
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nsControllerCommandTable::DoCommandParams(const char *aCommandName, nsICommandParams *aParams, nsISupports *aCommandRefCon)
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{
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// find the command
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nsCOMPtr<nsIControllerCommand> commandHandler;
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nsresult rv;
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rv = FindCommandHandler(aCommandName, getter_AddRefs(commandHandler));
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if (!commandHandler)
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{
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#if DEBUG
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NS_WARNING("Controller command table asked to do a command that it does not handle -- ");
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#endif
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return NS_OK; // we don't handle this command
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}
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return commandHandler->DoCommandParams(aCommandName, aParams, aCommandRefCon);
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}
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NS_IMETHODIMP
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nsControllerCommandTable::GetCommandState(const char *aCommandName, nsICommandParams *aParams, nsISupports *aCommandRefCon)
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{
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// find the command
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nsCOMPtr<nsIControllerCommand> commandHandler;
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nsresult rv;
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rv = FindCommandHandler(aCommandName, getter_AddRefs(commandHandler));
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if (!commandHandler)
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{
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#if DEBUG
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NS_WARNING("Controller command table asked to do a command that it does not handle -- ");
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#endif
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return NS_OK; // we don't handle this command
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}
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return commandHandler->GetCommandStateParams(aCommandName, aParams, aCommandRefCon);
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}
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nsresult
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NS_NewControllerCommandTable(nsIControllerCommandTable** aResult)
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{
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NS_PRECONDITION(aResult != nsnull, "null ptr");
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if (! aResult)
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return NS_ERROR_NULL_POINTER;
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nsControllerCommandTable* newCommandTable = new nsControllerCommandTable();
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if (! newCommandTable)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(newCommandTable);
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*aResult = newCommandTable;
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return NS_OK;
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}
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