--- /dev/null
+/* -*-c-*-
+ *
+ * $Id: xatom.c,v 1.1 1999/08/20 07:28:44 mdw Exp $
+ *
+ * Set and fetch X atom properties
+ *
+ * (c) 1999 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of the Edgeware X tools collection.
+ *
+ * X tools is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * X tools 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with X tools; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*----- Revision history --------------------------------------------------*
+ *
+ * $Log: xatom.c,v $
+ * Revision 1.1 1999/08/20 07:28:44 mdw
+ * New source file for manipulating atom-valued window properties.
+ *
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <X11/Xatom.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- @xatom_set@ --- *
+ *
+ * Arguments: @Display *d@ = pointer to display
+ * @Window w@ = window to set
+ * @Atom p@ = property to set
+ * @Atom a@ = atom property value
+ *
+ * Returns: ---
+ *
+ * Use: Sets an atom property on a particular window.
+ */
+
+void xatom_set(Display *d, Window w, Atom p, Atom a)
+{
+ XChangeProperty(d, w, p, XA_ATOM, 32, PropModeReplace,
+ (unsigned char *)&a, 1);
+}
+
+/* --- @xatom_get@ --- *
+ *
+ * Arguments: @Display *d@ = pointer to display
+ * @Window w@ = window to set
+ * @Atom p@ = property to read
+ *
+ * Returns: Atom which is the value of the property.
+ *
+ * Use: Reads an atom property from a particular window. The value
+ * @None@ is returned if there is no atom value.
+ */
+
+Atom xatom_get(Display *d, Window w, Atom p)
+{
+ Atom type, v;
+ unsigned long n, left;
+ int fmt;
+ unsigned char *buf;
+
+ /* --- Fetch the property value --- */
+
+ if (XGetWindowProperty(d, w, p, /* Display, window, property */
+ 0, 64, /* Offset, length (both in words) */
+ False, /* Delete after return? */
+ XA_ATOM, /* Data format type */
+ &type, &fmt, /* Actual type and format */
+ &n, &left, /* Amount read, and bytes left */
+ &buf) /* Where to put the buffer */
+ != Success ||
+ type != XA_ATOM ||
+ n < 1 || fmt < 32)
+ return (None);
+
+ /* --- OK, get the atom and return --- *
+ *
+ * This assumes that atoms are 32-bit things. This may not be the case.
+ * That's a right pain, actually. It looks as if Xlib is trying to do the
+ * right thing, so I'll go with that rather than trying to do anything
+ * clever. This is actually a bit of a poor interface.
+ */
+
+ v = *(Atom *)buf;
+ XFree(buf);
+ return (v);
+}
+
+/*----- That's all, folks -------------------------------------------------*/
--- /dev/null
+/* -*-c-*-
+ *
+ * $Id: xatom.h,v 1.1 1999/08/20 07:28:44 mdw Exp $
+ *
+ * Set and fetch X atom properties
+ *
+ * (c) 1999 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of the Edgeware X tools collection.
+ *
+ * X tools is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * X tools 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with X tools; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*----- Revision history --------------------------------------------------*
+ *
+ * $Log: xatom.h,v $
+ * Revision 1.1 1999/08/20 07:28:44 mdw
+ * New source file for manipulating atom-valued window properties.
+ *
+ */
+
+#ifndef XATOM_H
+#define XATOM_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+/*----- Functions provided ------------------------------------------------*/
+
+/* --- @xatom_set@ --- *
+ *
+ * Arguments: @Display *d@ = pointer to display
+ * @Window w@ = window to set
+ * @Atom p@ = property to set
+ * @Atom a@ = atom property value
+ *
+ * Returns: ---
+ *
+ * Use: Sets an atom property on a particular window.
+ */
+
+extern void xatom_set(Display */*d*/, Window /*w*/, Atom /*p*/, Atom /*a*/);
+
+/* --- @xatom_get@ --- *
+ *
+ * Arguments: @Display *d@ = pointer to display
+ * @Window w@ = window to set
+ * @Atom p@ = property to read
+ *
+ * Returns: Atom which is the value of the property.
+ *
+ * Use: Reads an atom property from a particular window. The value
+ * @None@ is returned if there is no atom value.
+ */
+
+extern Atom xatom_get(Display */*d*/, Window /*w*/, Atom /*p*/);
+
+/*----- That's all, folks -------------------------------------------------*/
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif
~mdw / xtoys / commitdiff