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/* This file is part of the Project Athena Zephyr Notification System.
* It is one of the source files comprising zwgc, the Zephyr WindowGram
* client.
*
* Created by: Marc Horowitz <marc@athena.mit.edu>
*
* $Id$
*
* Copyright (c) 1989 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#include <sysdep.h>
#if (!defined(lint) && !defined(SABER))
static const char rcsid_xselect_c[] = "$Id$";
#endif
#include <zephyr/mit-copyright.h>
/* xselect.c - ICCCM compliant cut-and-paste */
/* also includes some other ICCCMisms, such as the WM_PROTOCOL handling */
#ifndef X_DISPLAY_MISSING
#include <X11/Xlib.h>
#include <X11/Xproto.h>
#include <X11/Xatom.h>
#include "new_string.h"
#include "xselect.h"
extern char *getSelectedText(void);
static Time ownership_start = CurrentTime;
static Time ownership_end = CurrentTime;
Atom XA_WM_PROTOCOLS,XA_WM_DELETE_WINDOW;
static Atom ZA_TARGETS,ZA_MULTIPLE,ZA_TIMESTAMP,ZA_ATOM_PAIR;
static struct _ZAtom {
Atom *patom;
char *name;
} ZAtom[] = {
{&XA_WM_PROTOCOLS,"WM_PROTOCOLS"},
{&XA_WM_DELETE_WINDOW,"WM_DELETE_WINDOW"},
{&ZA_TARGETS,"TARGETS"},
{&ZA_MULTIPLE,"MULTIPLE"},
{&ZA_TIMESTAMP,"TIMESTAMP"},
{&ZA_ATOM_PAIR,"ATOM_PAIR"}
};
#define NumZAtoms (sizeof(ZAtom)/sizeof(struct _ZAtom))
/* internal static functions */
static void
xselNotify(Display *dpy,
XSelectionRequestEvent *selreq,
Atom property)
{
XSelectionEvent ev;
ev.type=SelectionNotify;
ev.requestor=selreq->requestor;
ev.selection=selreq->selection;
ev.target=selreq->target;
ev.property=property;
ev.time=selreq->time;
XSendEvent(dpy,ev.requestor,False,0,(XEvent *) &ev);
}
/* pRequestAtoms and RequestAtoms should have the same size. */
static Atom *pRequestAtoms[] = {
&ZA_TARGETS,&ZA_MULTIPLE,&ZA_TIMESTAMP,NULL
};
static Atom RequestAtoms[] = {
None,None,None,XA_STRING
};
#define NumRequestAtoms (sizeof(RequestAtoms)/sizeof(Atom))
#define PROP(prop,targ) ((prop)!=None?(prop):(targ))
#define ChangeProp(type,format,data,size) \
XChangeProperty(dpy,w,PROP(property,target),(type),(format), \
PropModeReplace, (unsigned char *) (data),(size))
static void
xselSetProperties(Display *dpy,
Window w,
Atom property,
Atom target,
XSelectionRequestEvent *selreq)
{
if (target==ZA_TARGETS) {
ChangeProp(XA_ATOM,32,RequestAtoms,NumRequestAtoms);
XSync(dpy,0);
} else if (target==ZA_MULTIPLE) {
Atom atype;
int aformat;
unsigned char *alistp; /* Avoid strict aliasing violation, we hope */
Atom *alist;
unsigned long alistsize,i;
XGetWindowProperty(dpy,w,property,0L,0L,False,ZA_ATOM_PAIR,&atype,
&aformat,&i,&alistsize,&alistp);
if (alistsize)
XGetWindowProperty(dpy,w,property,0L,alistsize/sizeof(Atom),False,
ZA_ATOM_PAIR,&atype,&aformat,&alistsize,&i, &alistp);
alist = (Atom *)alistp;
alistsize/=(sizeof(Atom)/4);
for (i=0;i<alistsize;i+=2)
xselSetProperties(dpy,w,alist[i+1],alist[i],selreq);
XFree((char *) alist);
} else if (target==ZA_TIMESTAMP) {
ChangeProp(XA_INTEGER,32,&ownership_start,1);
XSync(dpy,0);
} else if (target==XA_STRING) {
char *selected;
selected = getSelectedText();
if (selected) {
ChangeProp(XA_STRING,8,selected,string_Length(selected));
} else {
/* This should only happen if the pasting client is out of
spec (or if this program is buggy), but it could happen */
#ifdef DEBUG
fprintf(stderr,
"SelectionRequest event received for unowned selection: requestor wid=0x%lx", (unsigned long)w);
#endif
ChangeProp(XA_STRING,8,"",0);
}
XSync(dpy,0);
}
xselNotify(dpy,selreq,property);
}
/* global functions */
void
xicccmInitAtoms(Display *dpy)
{
unsigned int i;
for (i=0;i<NumZAtoms;i++)
*(ZAtom[i].patom)=XInternAtom(dpy,ZAtom[i].name,False);
for (i=0;i<NumRequestAtoms;i++)
if (pRequestAtoms[i])
RequestAtoms[i] = *(pRequestAtoms[i]);
}
int
xselGetOwnership(Display *dpy,
Window w,
Time when)
{
int temp;
XSetSelectionOwner(dpy,XA_PRIMARY,w,when);
temp=(w == XGetSelectionOwner(dpy,XA_PRIMARY));
if (temp)
ownership_start = when;
return(temp);
}
/* Get the selection. Return !0 if success, 0 if fail */
int
xselProcessSelection(Display *dpy,
Window w,
XEvent *event)
{
XSelectionRequestEvent *selreq = &(event->xselectionrequest);
#ifdef DEBUG
if ((selreq->owner != w) || (selreq->selection != XA_PRIMARY))
fprintf(stderr,"SelectionRequest event has bogus field values\n");
#endif
if ((ownership_start == CurrentTime) ||
(((selreq->time != CurrentTime) &&
(selreq->time < ownership_start)) ||
((ownership_end != CurrentTime) &&
(ownership_end > ownership_start) &&
(selreq->time > ownership_end))))
xselNotify(dpy,selreq,None);
else
xselSetProperties(dpy,selreq->requestor,selreq->property,selreq->target,
selreq);
return(1);
}
void
xselOwnershipLost(Time when)
{
ownership_end = when;
}
/*ARGSUSED*/
void
xselGiveUpOwnership(Display *dpy,
Window w)
{
XSetSelectionOwner(dpy,XA_PRIMARY,None,ownership_start);
ownership_end=ownership_start; /* Is this right? what should I use? */
}
#endif /* X_DISPLAY_MISSING */
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