Peter Howkins
276 lines
6.4 KiB
C
276 lines
6.4 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these librararies and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $XConsortium: SmScreen.c /main/4 1995/10/30 09:38:03 rswiston $ */
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/* *
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* (c) Copyright 1993, 1994 Hewlett-Packard Company *
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* (c) Copyright 1993, 1994 International Business Machines Corp. *
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* (c) Copyright 1993, 1994 Sun Microsystems, Inc. *
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* (c) Copyright 1993, 1994 Novell, Inc. *
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*/
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/*************************************<+>*************************************
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*****************************************************************************
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**
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** File: SmScreen.c
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**
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** Project: DT Session Manager (dtsession)
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**
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** Description:
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** -----------
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** This file contains all routines needed to manage external
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** screen savers.
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**
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*****************************************************************************
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*************************************<+>*************************************/
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#include <stdio.h>
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#include <signal.h>
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#include <X11/Intrinsic.h>
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#include <X11/Xutil.h>
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#include <X11/Xatom.h>
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#include <Dt/Wsm.h>
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#include <Dt/UserMsg.h>
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#include <Dt/SaverP.h>
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#include "Sm.h"
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#include "SmUI.h" /* smDD.* */
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#include "SmError.h"
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#include "SmWindow.h"
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#include "SmProtocol.h"
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#include "SmGlobals.h"
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#include "SmScreen.h"
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/*
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* Structures visible to this module only.
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*/
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typedef struct {
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int count;
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char *saver[1];
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/* variable length saver[] array */
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/* saver command strings */
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} SmSaverParseStruct;
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/*
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* Variables global to this module only
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*/
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static int savernum; /* current screen saver number */
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static void *saverstate = NULL; /* current running screen saver state */
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static int firsttime = 1; /* first call to StartScreenSaver */
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/*
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* Local Function declarations
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*/
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static void ParseSaverList(char *, int *, int *, SmSaverParseStruct *);
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/*************************************<->*************************************
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*
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* StartScreenSaver ()
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*
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*
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* Description:
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* -----------
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* Start an external screen saver.
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*
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* Inputs:
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* ------
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*
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*
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* Outputs:
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* -------
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*
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* Comments:
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* --------
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*
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*************************************<->***********************************/
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void
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StartScreenSaver( void )
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{
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int i;
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SmSaverParseStruct *parse;
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if (!smGD.saverListParse)
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{
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/*
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* Parse the screen saver list.
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*/
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smGD.saverListParse = SmSaverParseSaverList(smGD.saverList);
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if (!smGD.saverListParse)
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{
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return;
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}
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savernum = -1;
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}
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parse = (SmSaverParseStruct *)smGD.saverListParse;
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if (parse->count == 0)
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{
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return;
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}
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/*
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* Decide which saver number to use.
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*/
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savernum = (savernum + 1) % parse->count;
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if (firsttime)
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{
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/*
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* Load actions database.
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*/
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ProcessReloadActionsDatabase();
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firsttime = 0;
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}
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/*
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* Start screen saver. _DtSaverStop() must be called to terminate the
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* screen saver.
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*/
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saverstate = _DtSaverStart(smGD.display, smDD.coverDrawing,
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smGD.numSavedScreens, parse->saver[savernum],
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smGD.topLevelWid);
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}
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/*************************************<->*************************************
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*
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* StopScreenSaver ()
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*
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*
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* Description:
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* -----------
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* Stop an external screen saver.
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*
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* Inputs:
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* ------
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*
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*
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* Outputs:
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* -------
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*
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* Comments:
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* --------
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*
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*************************************<->***********************************/
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void
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StopScreenSaver( void )
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{
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if (saverstate)
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{
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/*
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* Terminate screen saver.
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*/
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_DtSaverStop(smGD.display, saverstate);
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saverstate = NULL;
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}
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}
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/*************************************<->*************************************
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*
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* SmSaverParseSaverList()
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*
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*
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* Description:
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* -----------
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* Parse screen saver list into allocated buffer.
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*
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* SaverLine = {SaverSpec|WhiteSpace}
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* SaverSpec = WhiteSpace Command WhiteSpace
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* Command = <valid action name>
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* WhiteSpace = {<space>|<horizontal tab>|<line feed>}
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*
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* For example, a saverList resource might be specified as:
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* *saverList: \n \
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* StartDtscreenSwarm \n\
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* StartDtscreenQix \n\
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* StartDtscreenLife
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*
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* And be represented in memory as:
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* "StartDtscreenSwarm \n StartDtscreenQix\n StartDtscreenLife"
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*
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*
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* Inputs:
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* ------
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* saverList - pointer to screen saver list. This memory is not changed.
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*
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* Outputs:
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* -------
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* none
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*
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* Return:
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* -------
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* pointer to allocated memory containing parsed saver list
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*
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* Comments:
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* --------
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*
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*************************************<->***********************************/
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void *
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SmSaverParseSaverList(
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char *saverList)
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{
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char tokenSep[] = " \n\t";
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char * token;
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int i = 0;
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char * tmpStr;
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int len = strlen(saverList);
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int bytes = sizeof(int);
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char *p;
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SmSaverParseStruct *pstruct;
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tmpStr = (char *)XtMalloc(len + 1);
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memcpy(tmpStr, saverList, len+1);
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token = strtok(tmpStr, tokenSep);
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while(token != NULL)
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{
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i++;
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bytes += sizeof(char *) + strlen(token) + 1;
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token = strtok(NULL, tokenSep);
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}
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pstruct = (SmSaverParseStruct *)XtMalloc(bytes);
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if (pstruct)
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{
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memcpy(tmpStr, saverList, len+1);
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token = strtok(tmpStr, tokenSep);
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pstruct->count = 0;
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p = (char *)(pstruct->saver + i);
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while(token != NULL)
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{
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pstruct->saver[pstruct->count] = p;
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strcpy(pstruct->saver[pstruct->count], token);
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p += strlen(token) + 1;
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token = strtok(NULL, tokenSep);
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pstruct->count++;
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}
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}
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XtFree ((char *) tmpStr);
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return((void *)pstruct);
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}
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