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