From 31356e9e9ad89b183b123b8b86b31c92f4520422 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Fri, 20 Jul 2007 19:36:29 +0200
Subject: [PATCH] The 2nd half of selection demo.

---
 Makefile    |  2 ++
 xclipsend.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 82 insertions(+)
 create mode 100644 xclipsend.c

diff --git a/Makefile b/Makefile
index c803277..ae05d46 100644
--- a/Makefile
+++ b/Makefile
@@ -8,11 +8,13 @@ all:
 
 parrot: parrot.c
 xclipcat: xclipcat.c
+xclipsend: xclipsend.c
 
 batt: CFLAGS+=$(shell xosd-config --cflags)
 batt: LDFLAGS+=$(shell xosd-config --libs)
 
 xclipcat: LDFLAGS+=-L/usr/X11R6/lib -lX11
+xclipsend: LDFLAGS+=-L/usr/X11R6/lib -lX11
 
 clean:
 	rm -f `find . -name "*~" -or -name "*.[oa]" -or -name "\#*\#" -or -name TAGS -or -name core -or -name .depend -or -name .#*`
diff --git a/xclipsend.c b/xclipsend.c
new file mode 100644
index 0000000..915ffc7
--- /dev/null
+++ b/xclipsend.c
@@ -0,0 +1,80 @@
+/*
+ *  Send data to primary X selection. Inspired by the `xclip' utility by Kim Saunders.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <X11/Xlib.h>
+#include <X11/Xatom.h>
+
+static Display *dpy;
+static Window win;
+
+static void die(char *msg)
+{
+  fprintf(stderr, "xclipcat: %s\n", msg);
+  exit(1);
+}
+
+int main(void)
+{
+  /* Prepare the string */
+  char send[] = "Brum!\n";
+  int len = sizeof(send);
+
+  /* Create display and window */
+  if (!(dpy = XOpenDisplay(NULL)))
+    die("Cannot open display");
+  win = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 0, 0, 1, 1, 0, 0, 0);
+
+  /* Select which events we want to listen to */
+  XSelectInput(dpy, win, PropertyChangeMask);
+
+  /* Take hold of the needed atoms */
+  Atom targets = XInternAtom(dpy, "TARGETS", False);
+
+  /* Assert ownership of the selection */
+  XSetSelectionOwner(dpy, XA_PRIMARY, win, CurrentTime);
+
+  /* Wait for the right event */
+  XEvent ev;
+  for (;;)
+    {
+      XNextEvent(dpy, &ev);
+      if (ev.type == SelectionClear)
+	break;
+      if (ev.type != SelectionRequest)
+	continue;
+
+      Window req_win = ev.xselectionrequest.requestor;
+      Atom req_pty = ev.xselectionrequest.property;
+      if (ev.xselectionrequest.target == targets)
+	{
+	  /* We were asked to send a list of supported formats */
+	  puts("Type list requested");
+	  Atom formats[2] = { targets, XA_STRING };
+	  XChangeProperty(dpy, req_win, req_pty, targets, 8, PropModeReplace, (unsigned char *) formats, (int) sizeof(formats));
+	}
+      else
+	{
+	  /* We were asked to send the contents */
+	  puts("Selection contents requested");
+	  XChangeProperty(dpy, req_win, req_pty, XA_STRING, 8, PropModeReplace, (unsigned char *) send, len);
+	}
+
+      /* Respond with another event */
+      XEvent re;
+      re.xselection.property = req_pty;
+      re.xselection.type = SelectionNotify;
+      re.xselection.display = ev.xselectionrequest.display;
+      re.xselection.requestor = req_win;
+      re.xselection.selection = ev.xselectionrequest.selection;
+      re.xselection.target = ev.xselectionrequest.target;
+      re.xselection.time = ev.xselectionrequest.time;
+      XSendEvent(dpy, req_win, 0, 0, &re);
+      XFlush(dpy);
+    }
+  puts("Selection replaced, good bye!");
+
+  return 0;
+}
-- 
2.39.2