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/*
* Copyright (c) 1999-2003 Smithsonian Astrophysical Observatory
*/
#include <xpap.h>
#if HAVE_XT
#include <X11/Intrinsic.h>
/*
*----------------------------------------------------------------------------
*
*
* Private Routines and Data
*
*
*----------------------------------------------------------------------------
*/
/*
*
* record struct for maintining Xt info in Xt select loop
*
*/
typedef struct xpaxtrec{
int fd;
void *client_data;
XtInputId id;
} *XPAXt, XPAXtRec;
/* its such a pain to maintain this, so make it global! */
static XtAppContext xpa_app=NULL;
/*
*----------------------------------------------------------------------------
*
* Routine: XPAXtHandler
*
* Purpose: handle one request for an xpaset or xpaget
*
* Return: none
*
*----------------------------------------------------------------------------
*/
#ifdef ANSI_FUNC
static void
XPAXtHandler (XtPointer client_data, int *fd, XtInputId *id)
#else
static void XPAXtHandler(client_data, fd, id)
XtPointer client_data;
int *fd;
XtInputId *id;
#endif
{
XPAXt xptr = (XPAXt)client_data;
if( (xptr == NULL) || (xptr->client_data == NULL) )
return;
XPAHandler((XPA)xptr->client_data, xptr->fd);
}
/*
*----------------------------------------------------------------------------
*
* Routine: XPAXtEnableOneInput
*
* Purpose: Enable 1 XPA entry from the Xt event loop
*
* Results: none
*
*----------------------------------------------------------------------------
*/
#ifdef ANSI_FUNC
static void
XPAXtEnableOneInput (void *client_data)
#else
static void XPAXtEnableOneInput(client_data)
void *client_data;
#endif
{
XPAXt xptr = (XPAXt)client_data;
if( xptr == NULL )
return;
if( xptr->id != (XtInputId)NULL )
return;
if( xpa_app == NULL ){
xptr->id = XtAddInput(xptr->fd,
(XtPointer)XtInputReadMask,
(XtInputCallbackProc)XPAXtHandler,
(XtPointer)xptr);
}
else{
xptr->id = XtAppAddInput(xpa_app, xptr->fd,
(XtPointer)XtInputReadMask,
(XtInputCallbackProc)XPAXtHandler,
(XtPointer)xptr);
}
}
/*
*----------------------------------------------------------------------------
*
* Routine: XPAXtDisableOneInput
*
* Purpose: Disable 1 XPA entry from the Xt event loop
*
* Results: none
*
*----------------------------------------------------------------------------
*/
#ifdef ANSI_FUNC
static void
XPAXtDisableOneInput (void *client_data)
#else
static void XPAXtDisableOneInput(client_data)
void *client_data;
#endif
{
XPAXt xptr = (XPAXt)client_data;
if( xptr == NULL )
return;
if( xptr->id == (XtInputId)NULL )
return;
XtRemoveInput(xptr->id);
xptr->id = (XtInputId)NULL;
}
/*
*----------------------------------------------------------------------------
*
* Routine: XPAXtAddOneInput
*
* Purpose: Add 1 XPA entry to the Xt event loop
*
* Results: none
*
*----------------------------------------------------------------------------
*/
#ifdef ANSI_FUNC
static void *
XPAXtAddOneInput (void *client_data, int fd)
#else
static void *XPAXtAddOneInput(client_data, fd)
void *client_data;
int fd;
#endif
{
XPAXt xptr;
if( fd < 0 )
return(NULL);
xptr = (XPAXt)xcalloc(1, sizeof(XPAXtRec));
xptr->fd = fd;
xptr->client_data = client_data;
XPAXtEnableOneInput(xptr);
return(xptr);
}
/*
*----------------------------------------------------------------------------
*
* Routine: XPAXtDelOneInput
*
* Purpose: Delete 1 XPA entry from the Xt event loop (called by XPAFree)
*
* Results: none
*
*----------------------------------------------------------------------------
*/
#ifdef ANSI_FUNC
static void
XPAXtDelOneInput (void *client_data)
#else
static void XPAXtDelOneInput(client_data)
void *client_data;
#endif
{
XPAXt xptr = (XPAXt)client_data;
if( xptr == NULL)
return;
XPAXtDisableOneInput(xptr);
xfree(xptr);
}
/*
*----------------------------------------------------------------------------
*
*
* Public Routines and Data
*
*
*----------------------------------------------------------------------------
*/
/*
*----------------------------------------------------------------------------
*
* Routine: XPAXtAddInput
*
* Purpose: Add XPA entries to the Xt event loop
*
* Results: number of xpa entried added
*
*----------------------------------------------------------------------------
*/
#ifdef ANSI_FUNC
int
XPAXtAddInput (void *app, XPA xpa)
#else
int XPAXtAddInput(app, xpa)
void *app;
XPA xpa;
#endif
{
XPA cur;
int got=0;
/* save the app context */
if( xpa_app == NULL ){
xpa_app = (XtAppContext)app;
}
/* if a specific xpa was specified, just add it */
if( xpa != NULL ){
/* remove old one */
if( xpa->seldel && xpa->selptr ){
(xpa->seldel)(xpa->selptr);
}
/* add new one */
xpa->seldel = XPAXtDelOneInput;
xpa->seladd = XPAXtAddOneInput;
xpa->selon = XPAXtEnableOneInput;
xpa->seloff = XPAXtDisableOneInput;
xpa->selptr = XPAXtAddOneInput((void *)xpa, xpa->fd);
got = 1;
}
/* otherwise set up all xpa's */
else{
for(cur=(XPA)XPAListHead(); cur!=NULL; cur=cur->next){
/* remove old one */
if( cur->seldel && cur->selptr ){
(cur->seldel)(cur->selptr);
}
/* add new one */
cur->seldel = XPAXtDelOneInput;
cur->seladd = XPAXtAddOneInput;
cur->selon = XPAXtEnableOneInput;
cur->seloff = XPAXtDisableOneInput;
cur->selptr = XPAXtAddOneInput((void *)cur, cur->fd);
got++;
}
}
return(got);
}
int xpa_xt = 1;
#else
int xpa_xt = 0;
#endif
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