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Diffstat (limited to 'gdk/gdkproperty.c')
| -rw-r--r-- | gdk/gdkproperty.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/gdk/gdkproperty.c b/gdk/gdkproperty.c new file mode 100644 index 0000000000..35d8a50cf1 --- /dev/null +++ b/gdk/gdkproperty.c @@ -0,0 +1,194 @@ +/* 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" + + +GdkAtom +gdk_atom_intern (const gchar *atom_name, + gint only_if_exists) +{ + return XInternAtom (gdk_display, atom_name, only_if_exists); +} + +gchar * +gdk_atom_name (GdkAtom atom) +{ + gchar *t; + gchar *name; + + /* If this atom doesn't exist, we'll die with an X error unless + we take precautions */ + + gdk_error_warnings = 0; + t = XGetAtomName (gdk_display, atom); + gdk_error_warnings = 1; + + if (gdk_error_code == -1) + { + return NULL; + } + else + { + name = g_strdup (t); + XFree (t); + + return name; + } +} + +gint +gdk_property_get (GdkWindow *window, + GdkAtom property, + GdkAtom type, + gulong offset, + gulong length, + gint pdelete, + GdkAtom *actual_property_type, + gint *actual_format_type, + gint *actual_length, + guchar **data) +{ + GdkWindowPrivate *private; + Display *xdisplay; + Window xwindow; + Atom ret_prop_type; + gint ret_format; + gulong ret_nitems; + gulong ret_bytes_after; + gulong ret_length; + guchar *ret_data; + + if (window) + { + private = (GdkWindowPrivate*) window; + xdisplay = private->xdisplay; + xwindow = private->xwindow; + } + else + { + xdisplay = gdk_display; + xwindow = gdk_root_window; + } + + XGetWindowProperty (xdisplay, xwindow, property, + offset, (length + 3) / 4, pdelete, + type, &ret_prop_type, &ret_format, + &ret_nitems, &ret_bytes_after, + &ret_data); + + if ((ret_prop_type == None) && (ret_format == 0)) + return FALSE; + + if (actual_property_type) + *actual_property_type = ret_prop_type; + if (actual_format_type) + *actual_format_type = ret_format; + + if (ret_prop_type != property) + { + XFree (ret_data); + return FALSE; + } + + /* FIXME: ignoring bytes_after could have very bad effects */ + + if (data) + { + switch (ret_format) + { + case 8: + ret_length = ret_nitems; + break; + case 16: + ret_length = 2 * ret_nitems; + break; + case 32: + ret_length = 4 * ret_nitems; + break; + default: + g_warning ("unknown property return format: %d", ret_format); + XFree (ret_data); + return FALSE; + } + + *data = g_new (guchar, ret_length); + memcpy (*data, ret_data, ret_length); + if (actual_length) + *actual_length = ret_length; + } + + XFree (ret_data); + + return TRUE; +} + +void +gdk_property_change (GdkWindow *window, + GdkAtom property, + GdkAtom type, + gint format, + GdkPropMode mode, + guchar *data, + gint nelements) +{ + GdkWindowPrivate *private; + Display *xdisplay; + Window xwindow; + + if (window) + { + private = (GdkWindowPrivate*) window; + xdisplay = private->xdisplay; + xwindow = private->xwindow; + } + else + { + xdisplay = gdk_display; + xwindow = gdk_root_window; + } + + XChangeProperty (xdisplay, xwindow, property, type, + format, mode, data, nelements); +} + +void +gdk_property_delete (GdkWindow *window, + GdkAtom property) +{ + GdkWindowPrivate *private; + Display *xdisplay; + Window xwindow; + + if (window) + { + private = (GdkWindowPrivate*) window; + xdisplay = private->xdisplay; + xwindow = private->xwindow; + } + else + { + xdisplay = gdk_display; + xwindow = gdk_root_window; + } + + XDeleteProperty (xdisplay, xwindow, property); +} |