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/*
* This program is only intended for OS X, but the
* ifdef __APPLE__ below lets us build it on all systems.
* On non-OS X systems, you can use it to hold the snarf
* buffer around after a program exits.
*/
#include <u.h>
#define Colormap XColormap
#define Cursor XCursor
#define Display XDisplay
#define Drawable XDrawable
#define Font XFont
#define GC XGC
#define Point XPoint
#define Rectangle XRectangle
#define Screen XScreen
#define Visual XVisual
#define Window XWindow
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include <X11/IntrinsicP.h>
#include <X11/StringDefs.h>
#undef Colormap
#undef Cursor
#undef Display
#undef Drawable
#undef Font
#undef GC
#undef Point
#undef Rectangle
#undef Screen
#undef Visual
#undef Window
#ifdef __APPLE__
#define APPLESNARF
#define Boolean AppleBoolean
#define Rect AppleRect
#define EventMask AppleEventMask
#define Point ApplePoint
#define Cursor AppleCursor
#include <Carbon/Carbon.h>
AUTOFRAMEWORK(Carbon)
#undef Boolean
#undef Rect
#undef EventMask
#undef Point
#undef Cursor
#endif
#include <libc.h>
#undef time
AUTOLIB(draw) /* to cause link of X11 */
enum {
SnarfSize = 65536,
};
char snarf[3*SnarfSize+1];
Rune rsnarf[SnarfSize+1];
XDisplay *xdisplay;
XWindow drawable;
Atom xclipboard;
Atom xutf8string;
Atom xtargets;
Atom xtext;
Atom xcompoundtext;
void xselectionrequest(XEvent*);
char *xgetsnarf(void);
void appleputsnarf(void);
void xputsnarf(void);
int verbose;
#ifdef __APPLE__
PasteboardRef appleclip;
#endif
void
usage(void)
{
fprint(2, "usage: snarfer [-v]\n");
exits("usage");
}
void
main(int argc, char **argv)
{
XEvent xevent;
ARGBEGIN{
default:
usage();
case 'v':
verbose = 1;
break;
}ARGEND
if((xdisplay = XOpenDisplay(nil)) == nil)
sysfatal("XOpenDisplay: %r");
drawable = XCreateWindow(xdisplay, DefaultRootWindow(xdisplay),
0, 0, 1, 1, 0, 0,
InputOutput, DefaultVisual(xdisplay, DefaultScreen(xdisplay)),
0, 0);
if(drawable == None)
sysfatal("XCreateWindow: %r");
XFlush(xdisplay);
xclipboard = XInternAtom(xdisplay, "CLIPBOARD", False);
xutf8string = XInternAtom(xdisplay, "UTF8_STRING", False);
xtargets = XInternAtom(xdisplay, "TARGETS", False);
xtext = XInternAtom(xdisplay, "TEXT", False);
xcompoundtext = XInternAtom(xdisplay, "COMPOUND_TEXT", False);
#ifdef __APPLE__
if(PasteboardCreate(kPasteboardClipboard, &appleclip) != noErr)
sysfatal("pasteboard create failed");
#endif
xgetsnarf();
appleputsnarf();
xputsnarf();
for(;;){
XNextEvent(xdisplay, &xevent);
switch(xevent.type){
case DestroyNotify:
exits(0);
case SelectionClear:
xgetsnarf();
appleputsnarf();
xputsnarf();
if(verbose)
print("snarf{%s}\n", snarf);
break;
case SelectionRequest:
xselectionrequest(&xevent);
break;
}
}
}
void
xselectionrequest(XEvent *e)
{
char *name;
Atom a[4];
XEvent r;
XSelectionRequestEvent *xe;
XDisplay *xd;
xd = xdisplay;
memset(&r, 0, sizeof r);
xe = (XSelectionRequestEvent*)e;
if(0) fprint(2, "xselect target=%d requestor=%d property=%d selection=%d\n",
xe->target, xe->requestor, xe->property, xe->selection);
r.xselection.property = xe->property;
if(xe->target == xtargets){
a[0] = XA_STRING;
a[1] = xutf8string;
a[2] = xtext;
a[3] = xcompoundtext;
XChangeProperty(xd, xe->requestor, xe->property, xe->target,
8, PropModeReplace, (uchar*)a, sizeof a);
}else if(xe->target == XA_STRING || xe->target == xutf8string || xe->target == xtext || xe->target == xcompoundtext){
/* if the target is STRING we're supposed to reply with Latin1 XXX */
XChangeProperty(xd, xe->requestor, xe->property, xe->target,
8, PropModeReplace, (uchar*)snarf, strlen(snarf));
}else{
name = XGetAtomName(xd, xe->target);
if(strcmp(name, "TIMESTAMP") != 0)
fprint(2, "%s: cannot handle selection request for '%s' (%d)\n", argv0, name, (int)xe->target);
r.xselection.property = None;
}
r.xselection.display = xe->display;
/* r.xselection.property filled above */
r.xselection.target = xe->target;
r.xselection.type = SelectionNotify;
r.xselection.requestor = xe->requestor;
r.xselection.time = xe->time;
r.xselection.send_event = True;
r.xselection.selection = xe->selection;
XSendEvent(xd, xe->requestor, False, 0, &r);
XFlush(xd);
}
char*
xgetsnarf(void)
{
uchar *data, *xdata;
Atom clipboard, type, prop;
ulong len, lastlen, dummy;
int fmt, i;
XWindow w;
XDisplay *xd;
xd = xdisplay;
w = None;
clipboard = None;
/*
* Is there a primary selection (highlighted text in an xterm)?
*/
if(0){
clipboard = XA_PRIMARY;
w = XGetSelectionOwner(xd, XA_PRIMARY);
if(w == drawable)
return snarf;
}
/*
* If not, is there a clipboard selection?
*/
if(w == None && xclipboard != None){
clipboard = xclipboard;
w = XGetSelectionOwner(xd, xclipboard);
if(w == drawable)
return snarf;
}
/*
* If not, give up.
*/
if(w == None)
return nil;
/*
* We should be waiting for SelectionNotify here, but it might never
* come, and we have no way to time out. Instead, we will clear
* local property #1, request our buddy to fill it in for us, and poll
* until he's done or we get tired of waiting.
*
* We should try to go for _x.utf8string instead of XA_STRING,
* but that would add to the polling.
*/
prop = 1;
XChangeProperty(xd, drawable, prop, XA_STRING, 8, PropModeReplace, (uchar*)"", 0);
XConvertSelection(xd, clipboard, XA_STRING, prop, drawable, CurrentTime);
XFlush(xd);
lastlen = 0;
for(i=0; i<10 || (lastlen!=0 && i<30); i++){
sleep(100);
XGetWindowProperty(xd, drawable, prop, 0, 0, 0, AnyPropertyType,
&type, &fmt, &dummy, &len, &data);
if(lastlen == len && len > 0)
break;
lastlen = len;
}
if(i == 10)
return nil;
/* get the property */
data = nil;
XGetWindowProperty(xd, drawable, prop, 0, SnarfSize/sizeof(ulong), 0,
AnyPropertyType, &type, &fmt, &len, &dummy, &xdata);
if(xdata == nil || (type != XA_STRING && type != xutf8string) || len == 0){
if(xdata)
XFree(xdata);
return nil;
}
if(strlen((char*)xdata) >= SnarfSize){
XFree(xdata);
return nil;
}
strcpy(snarf, (char*)xdata);
return snarf;
}
void
xputsnarf(void)
{
XSetSelectionOwner(xdisplay, XA_PRIMARY, drawable, CurrentTime);
if(xclipboard != None)
XSetSelectionOwner(xdisplay, xclipboard, drawable, CurrentTime);
XFlush(xdisplay);
}
void
appleputsnarf(void)
{
#ifdef __APPLE__
CFDataRef cfdata;
PasteboardSyncFlags flags;
runesnprint(rsnarf, nelem(rsnarf), "%s", snarf);
if(PasteboardClear(appleclip) != noErr){
fprint(2, "apple pasteboard clear failed\n");
return;
}
flags = PasteboardSynchronize(appleclip);
if((flags&kPasteboardModified) || !(flags&kPasteboardClientIsOwner)){
fprint(2, "apple pasteboard cannot assert ownership\n");
return;
}
cfdata = CFDataCreate(kCFAllocatorDefault,
(uchar*)rsnarf, runestrlen(rsnarf)*2);
if(cfdata == nil){
fprint(2, "apple pasteboard cfdatacreate failed\n");
return;
}
if(PasteboardPutItemFlavor(appleclip, (PasteboardItemID)1,
CFSTR("public.utf16-plain-text"), cfdata, 0) != noErr){
fprint(2, "apple pasteboard putitem failed\n");
CFRelease(cfdata);
return;
}
CFRelease(cfdata);
#endif
}
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