Initial revision

1 files changed, 168 insertions, 0 deletions

diff --git a/gdk/gdkselection.c b/gdk/gdkselection.c
new file mode 100644
index 0000000000..6bd4251100
--- /dev/null
+++ b/gdk/gdkselection.c
@@ -0,0 +1,168 @@
+/* GDK - The GIMP Drawing Kit
+ * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <X11/Xlib.h>
+#include <X11/Xatom.h>
+#include <string.h>
+#include "gdk.h"
+#include "gdkprivate.h"
+
+
+gint
+gdk_selection_owner_set (GdkWindow *owner,
+			 GdkAtom    selection,
+			 guint32    time,
+			 gint       send_event)
+{
+  GdkWindowPrivate *private;
+  Display *xdisplay;
+  Window xwindow;
+
+  if (owner)
+    {
+      private = (GdkWindowPrivate*) owner;
+      xdisplay = private->xdisplay;
+      xwindow = private->xwindow;
+    }
+  else
+    {
+      xdisplay = gdk_display;
+      xwindow = None;
+    }
+
+  XSetSelectionOwner (xdisplay, selection, xwindow, time);
+
+  return (XGetSelectionOwner (xdisplay, selection) == xwindow);
+}
+
+GdkWindow*
+gdk_selection_owner_get (GdkAtom selection)
+{
+  Window xwindow;
+
+  xwindow = XGetSelectionOwner (gdk_display, selection);
+  if (xwindow == None)
+    return NULL;
+
+  return gdk_window_lookup (xwindow);
+}
+
+void
+gdk_selection_convert (GdkWindow *requestor,
+		       GdkAtom    selection,
+		       GdkAtom    target,
+		       guint32    time)
+{
+  GdkWindowPrivate *private;
+
+  g_return_if_fail (requestor != NULL);
+
+  private = (GdkWindowPrivate*) requestor;
+
+  XConvertSelection (private->xdisplay, selection, target,
+		     gdk_selection_property, private->xwindow, time);
+}
+
+gint
+gdk_selection_property_get (GdkWindow  *requestor,
+			    guchar    **data,
+			    GdkAtom    *ret_type,
+			    gint       *ret_format)
+{
+  GdkWindowPrivate *private;
+  gulong nitems;
+  gulong nbytes;
+  gulong length;
+  GdkAtom prop_type;
+  gint prop_format;
+  guchar *t;
+
+  g_return_val_if_fail (requestor != NULL, 0);
+
+  /* If retrieved chunks are typically small, (and the ICCM says the
+     should be) it would be a win to try first with a buffer of
+     moderate length, to avoid two round trips to the server */
+
+  private = (GdkWindowPrivate*) requestor;
+
+  XGetWindowProperty (private->xdisplay, private->xwindow,
+		      gdk_selection_property, 0, 0, False,
+		      AnyPropertyType, &prop_type, &prop_format,
+		      &nitems, &nbytes, &t);
+
+  if (ret_type)
+    *ret_type = prop_type;
+  if (ret_format)
+    *ret_format = prop_format;
+
+  if (prop_type == None)
+    {
+      *data = NULL;
+      return 0;
+    }
+    
+  XFree (t);
+
+  /* Add on an extra byte to handle null termination.  X guarantees
+     that t will be 1 longer than nbytes and null terminated */
+  length = nbytes + 1;
+
+  /* We can't delete the selection here, because it might be the INCR
+     protocol, in which case the client has to make sure they'll be
+     notified of PropertyChange events _before_ the property is deleted.
+     Otherwise there's no guarantee we'll win the race ... */
+  XGetWindowProperty (private->xdisplay, private->xwindow,
+		      gdk_selection_property, 0, (nbytes + 3) / 4, False,
+		      AnyPropertyType, &prop_type, &prop_format,
+		      &nitems, &nbytes, &t);
+
+  if (prop_type != None)
+    {
+      *data = g_new (guchar, length);
+      memcpy (*data, t, length);
+      XFree (t);
+      return length-1;
+    }
+  else
+    {
+      *data = NULL;
+      return 0;
+    }
+}
+
+
+void
+gdk_selection_send_notify (guint32  requestor,
+			   GdkAtom  selection,
+			   GdkAtom  target,
+			   GdkAtom  property,
+			   guint32  time)
+{
+  XSelectionEvent xevent;
+
+  xevent.type = SelectionNotify;
+  xevent.serial = 0;
+  xevent.send_event = True;
+  xevent.display = gdk_display;
+  xevent.requestor = requestor;
+  xevent.selection = selection;
+  xevent.target = target;
+  xevent.property = property;
+  xevent.time = time;
+
+  XSendEvent (gdk_display, requestor, False, NoEventMask, (XEvent*) &xevent);
+}