forked from AuroraMiddleware/gtk
574 lines
15 KiB
C
574 lines
15 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include "gdkproperty.h"
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#include "gdkmain.h"
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#include "gdkprivate.h"
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#include "gdkinternals.h"
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#include "gdkselection.h"
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#include "gdkprivate-x11.h"
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#include "gdkdisplay-x11.h"
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#include "gdkscreen-x11.h"
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#include <X11/Xlib.h>
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#include <X11/Xatom.h>
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#include <string.h>
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#define N_PREDEFINED_ATOMS 69
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#define ATOM_TO_INDEX(atom) (GPOINTER_TO_UINT(atom))
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#define INDEX_TO_ATOM(atom) ((GdkAtom)GUINT_TO_POINTER(atom))
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static void
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insert_atom_pair (GdkDisplay *display,
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GdkAtom virtual_atom,
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Atom xatom)
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{
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GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
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if (!display_x11->atom_from_virtual)
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{
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display_x11->atom_from_virtual = g_hash_table_new (g_direct_hash, NULL);
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display_x11->atom_to_virtual = g_hash_table_new (g_direct_hash, NULL);
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}
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g_hash_table_insert (display_x11->atom_from_virtual,
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GDK_ATOM_TO_POINTER (virtual_atom),
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GUINT_TO_POINTER (xatom));
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g_hash_table_insert (display_x11->atom_to_virtual,
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GUINT_TO_POINTER (xatom),
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GDK_ATOM_TO_POINTER (virtual_atom));
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}
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static Atom
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lookup_cached_xatom (GdkDisplay *display,
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GdkAtom atom)
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{
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GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
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if (ATOM_TO_INDEX (atom) < N_PREDEFINED_ATOMS)
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return ATOM_TO_INDEX (atom);
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if (display_x11->atom_from_virtual)
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return GPOINTER_TO_UINT (g_hash_table_lookup (display_x11->atom_from_virtual,
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GDK_ATOM_TO_POINTER (atom)));
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return None;
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}
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/**
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* gdk_x11_atom_to_xatom_for_display:
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* @display: (type GdkX11Display): A #GdkDisplay
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* @atom: A #GdkAtom, or %GDK_NONE
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*
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* Converts from a #GdkAtom to the X atom for a #GdkDisplay
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* with the same string value. The special value %GDK_NONE
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* is converted to %None.
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*
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* Returns: the X atom corresponding to @atom, or %None
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*
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* Since: 2.2
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**/
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Atom
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gdk_x11_atom_to_xatom_for_display (GdkDisplay *display,
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GdkAtom atom)
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{
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Atom xatom = None;
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g_return_val_if_fail (GDK_IS_DISPLAY (display), None);
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if (atom == GDK_NONE)
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return None;
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if (gdk_display_is_closed (display))
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return None;
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xatom = lookup_cached_xatom (display, atom);
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if (!xatom)
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{
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char *name = gdk_atom_name (atom);
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xatom = XInternAtom (GDK_DISPLAY_XDISPLAY (display), name, FALSE);
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insert_atom_pair (display, atom, xatom);
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g_free (name);
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}
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return xatom;
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}
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void
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_gdk_x11_precache_atoms (GdkDisplay *display,
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const gchar * const *atom_names,
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gint n_atoms)
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{
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Atom *xatoms;
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GdkAtom *atoms;
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const gchar **xatom_names;
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gint n_xatoms;
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gint i;
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xatoms = g_new (Atom, n_atoms);
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xatom_names = g_new (const gchar *, n_atoms);
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atoms = g_new (GdkAtom, n_atoms);
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n_xatoms = 0;
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for (i = 0; i < n_atoms; i++)
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{
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GdkAtom atom = gdk_atom_intern_static_string (atom_names[i]);
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if (lookup_cached_xatom (display, atom) == None)
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{
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atoms[n_xatoms] = atom;
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xatom_names[n_xatoms] = atom_names[i];
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n_xatoms++;
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}
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}
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if (n_xatoms)
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XInternAtoms (GDK_DISPLAY_XDISPLAY (display),
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(char **)xatom_names, n_xatoms, False, xatoms);
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for (i = 0; i < n_xatoms; i++)
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insert_atom_pair (display, atoms[i], xatoms[i]);
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g_free (xatoms);
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g_free (xatom_names);
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g_free (atoms);
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}
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/**
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* gdk_x11_atom_to_xatom:
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* @atom: A #GdkAtom
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*
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* Converts from a #GdkAtom to the X atom for the default GDK display
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* with the same string value.
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*
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* Returns: the X atom corresponding to @atom.
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**/
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Atom
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gdk_x11_atom_to_xatom (GdkAtom atom)
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{
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return gdk_x11_atom_to_xatom_for_display (gdk_display_get_default (), atom);
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}
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/**
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* gdk_x11_xatom_to_atom_for_display:
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* @display: (type GdkX11Display): A #GdkDisplay
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* @xatom: an X atom
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*
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* Convert from an X atom for a #GdkDisplay to the corresponding
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* #GdkAtom.
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*
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* Returns: (transfer none): the corresponding #GdkAtom.
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*
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* Since: 2.2
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**/
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GdkAtom
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gdk_x11_xatom_to_atom_for_display (GdkDisplay *display,
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Atom xatom)
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{
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GdkX11Display *display_x11;
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GdkAtom virtual_atom = GDK_NONE;
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g_return_val_if_fail (GDK_IS_DISPLAY (display), GDK_NONE);
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if (xatom == None)
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return GDK_NONE;
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if (gdk_display_is_closed (display))
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return GDK_NONE;
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display_x11 = GDK_X11_DISPLAY (display);
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if (xatom < N_PREDEFINED_ATOMS)
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return INDEX_TO_ATOM (xatom);
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if (display_x11->atom_to_virtual)
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virtual_atom = GDK_POINTER_TO_ATOM (g_hash_table_lookup (display_x11->atom_to_virtual,
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GUINT_TO_POINTER (xatom)));
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if (!virtual_atom)
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{
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/* If this atom doesn't exist, we'll die with an X error unless
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* we take precautions
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*/
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char *name;
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gdk_x11_display_error_trap_push (display);
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name = XGetAtomName (GDK_DISPLAY_XDISPLAY (display), xatom);
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if (gdk_x11_display_error_trap_pop (display))
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{
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g_warning (G_STRLOC " invalid X atom: %ld", xatom);
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}
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else
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{
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virtual_atom = gdk_atom_intern (name, FALSE);
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XFree (name);
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insert_atom_pair (display, virtual_atom, xatom);
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}
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}
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return virtual_atom;
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}
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/**
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* gdk_x11_xatom_to_atom:
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* @xatom: an X atom for the default GDK display
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*
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* Convert from an X atom for the default display to the corresponding
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* #GdkAtom.
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*
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* Returns: (transfer none): the corresponding G#dkAtom.
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**/
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GdkAtom
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gdk_x11_xatom_to_atom (Atom xatom)
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{
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return gdk_x11_xatom_to_atom_for_display (gdk_display_get_default (), xatom);
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}
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/**
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* gdk_x11_get_xatom_by_name_for_display:
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* @display: (type GdkX11Display): a #GdkDisplay
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* @atom_name: a string
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*
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* Returns the X atom for a #GdkDisplay corresponding to @atom_name.
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* This function caches the result, so if called repeatedly it is much
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* faster than XInternAtom(), which is a round trip to the server each time.
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*
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* Returns: a X atom for a #GdkDisplay
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*
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* Since: 2.2
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**/
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Atom
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gdk_x11_get_xatom_by_name_for_display (GdkDisplay *display,
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const gchar *atom_name)
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{
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g_return_val_if_fail (GDK_IS_DISPLAY (display), None);
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return gdk_x11_atom_to_xatom_for_display (display,
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gdk_atom_intern (atom_name, FALSE));
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}
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Atom
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_gdk_x11_get_xatom_for_display_printf (GdkDisplay *display,
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const gchar *format,
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...)
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{
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va_list args;
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char *atom_name;
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Atom atom;
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va_start (args, format);
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atom_name = g_strdup_vprintf (format, args);
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va_end (args);
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atom = gdk_x11_get_xatom_by_name_for_display (display, atom_name);
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g_free (atom_name);
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return atom;
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}
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/**
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* gdk_x11_get_xatom_by_name:
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* @atom_name: a string
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*
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* Returns the X atom for GDK’s default display corresponding to @atom_name.
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* This function caches the result, so if called repeatedly it is much
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* faster than XInternAtom(), which is a round trip to the server each time.
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*
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* Returns: a X atom for GDK’s default display.
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**/
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Atom
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gdk_x11_get_xatom_by_name (const gchar *atom_name)
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{
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return gdk_x11_get_xatom_by_name_for_display (gdk_display_get_default (),
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atom_name);
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}
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/**
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* gdk_x11_get_xatom_name_for_display:
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* @display: (type GdkX11Display): the #GdkDisplay where @xatom is defined
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* @xatom: an X atom
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*
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* Returns the name of an X atom for its display. This
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* function is meant mainly for debugging, so for convenience, unlike
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* XAtomName() and gdk_atom_name(), the result doesn’t need to
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* be freed.
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*
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* Returns: name of the X atom; this string is owned by GDK,
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* so it shouldn’t be modifed or freed.
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*
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* Since: 2.2
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**/
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const gchar *
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gdk_x11_get_xatom_name_for_display (GdkDisplay *display,
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Atom xatom)
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{
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g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
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return _gdk_atom_name_const (gdk_x11_xatom_to_atom_for_display (display, xatom));
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}
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/**
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* gdk_x11_get_xatom_name:
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* @xatom: an X atom for GDK’s default display
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*
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* Returns the name of an X atom for GDK’s default display. This
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* function is meant mainly for debugging, so for convenience, unlike
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* XAtomName() and gdk_atom_name(), the result
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* doesn’t need to be freed. Also, this function will never return %NULL,
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* even if @xatom is invalid.
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*
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* Returns: name of the X atom; this string is owned by GTK+,
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* so it shouldn’t be modifed or freed.
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**/
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const gchar *
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gdk_x11_get_xatom_name (Atom xatom)
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{
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return _gdk_atom_name_const (gdk_x11_xatom_to_atom (xatom));
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}
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gboolean
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_gdk_x11_window_get_property (GdkWindow *window,
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GdkAtom property,
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GdkAtom type,
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gulong offset,
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gulong length,
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gint pdelete,
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GdkAtom *actual_property_type,
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gint *actual_format_type,
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gint *actual_length,
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guchar **data)
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{
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GdkDisplay *display;
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Atom ret_prop_type;
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gint ret_format;
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gulong ret_nitems;
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gulong ret_bytes_after;
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gulong get_length;
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gulong ret_length;
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guchar *ret_data;
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Atom xproperty;
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Atom xtype;
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int res;
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g_return_val_if_fail (!window || GDK_WINDOW_IS_X11 (window), FALSE);
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if (!window)
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window = gdk_display_get_root_window (gdk_display_get_default ());
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else if (!GDK_WINDOW_IS_X11 (window))
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return FALSE;
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if (GDK_WINDOW_DESTROYED (window))
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return FALSE;
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display = gdk_window_get_display (window);
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xproperty = gdk_x11_atom_to_xatom_for_display (display, property);
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if (type == GDK_NONE)
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xtype = AnyPropertyType;
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else
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xtype = gdk_x11_atom_to_xatom_for_display (display, type);
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ret_data = NULL;
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/*
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* Round up length to next 4 byte value. Some code is in the (bad?)
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* habit of passing G_MAXLONG as the length argument, causing an
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* overflow to negative on the add. In this case, we clamp the
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* value to G_MAXLONG.
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*/
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get_length = length + 3;
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if (get_length > G_MAXLONG)
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get_length = G_MAXLONG;
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/* To fail, either the user passed 0 or G_MAXULONG */
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get_length = get_length / 4;
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if (get_length == 0)
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{
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g_warning ("gdk_propery-get(): invalid length 0");
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return FALSE;
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}
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res = XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display),
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GDK_WINDOW_XID (window), xproperty,
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offset, get_length, pdelete,
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xtype, &ret_prop_type, &ret_format,
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&ret_nitems, &ret_bytes_after,
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&ret_data);
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if (res != Success || (ret_prop_type == None && ret_format == 0))
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{
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return FALSE;
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}
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if (actual_property_type)
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*actual_property_type = gdk_x11_xatom_to_atom_for_display (display, ret_prop_type);
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if (actual_format_type)
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*actual_format_type = ret_format;
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if ((xtype != AnyPropertyType) && (ret_prop_type != xtype))
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{
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XFree (ret_data);
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g_warning ("Couldn't match property type %s to %s\n",
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gdk_x11_get_xatom_name_for_display (display, ret_prop_type),
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gdk_x11_get_xatom_name_for_display (display, xtype));
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return FALSE;
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}
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/* FIXME: ignoring bytes_after could have very bad effects */
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if (data)
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{
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if (ret_prop_type == XA_ATOM ||
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ret_prop_type == gdk_x11_get_xatom_by_name_for_display (display, "ATOM_PAIR"))
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{
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/*
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* data is an array of X atom, we need to convert it
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* to an array of GDK Atoms
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*/
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gint i;
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GdkAtom *ret_atoms = g_new (GdkAtom, ret_nitems);
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Atom *xatoms = (Atom *)ret_data;
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*data = (guchar *)ret_atoms;
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for (i = 0; i < ret_nitems; i++)
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ret_atoms[i] = gdk_x11_xatom_to_atom_for_display (display, xatoms[i]);
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if (actual_length)
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*actual_length = ret_nitems * sizeof (GdkAtom);
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}
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else
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{
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switch (ret_format)
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{
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case 8:
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ret_length = ret_nitems;
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break;
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case 16:
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ret_length = sizeof(short) * ret_nitems;
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break;
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case 32:
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ret_length = sizeof(long) * ret_nitems;
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break;
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default:
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g_warning ("unknown property return format: %d", ret_format);
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XFree (ret_data);
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return FALSE;
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}
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*data = g_new (guchar, ret_length);
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memcpy (*data, ret_data, ret_length);
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if (actual_length)
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*actual_length = ret_length;
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}
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}
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XFree (ret_data);
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return TRUE;
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}
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void
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_gdk_x11_window_change_property (GdkWindow *window,
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GdkAtom property,
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GdkAtom type,
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gint format,
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GdkPropMode mode,
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const guchar *data,
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gint nelements)
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{
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GdkDisplay *display;
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Window xwindow;
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Atom xproperty;
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Atom xtype;
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g_return_if_fail (!window || GDK_WINDOW_IS_X11 (window));
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if (!window)
|
||
window = gdk_display_get_root_window (gdk_display_get_default ());
|
||
else if (!GDK_WINDOW_IS_X11 (window))
|
||
return;
|
||
|
||
if (GDK_WINDOW_DESTROYED (window))
|
||
return;
|
||
|
||
if (!gdk_window_has_native (window))
|
||
{
|
||
g_warning ("Can't change property on non-native window");
|
||
return;
|
||
}
|
||
|
||
display = gdk_window_get_display (window);
|
||
xproperty = gdk_x11_atom_to_xatom_for_display (display, property);
|
||
xtype = gdk_x11_atom_to_xatom_for_display (display, type);
|
||
xwindow = GDK_WINDOW_XID (window);
|
||
|
||
if (xtype == XA_ATOM ||
|
||
xtype == gdk_x11_get_xatom_by_name_for_display (display, "ATOM_PAIR"))
|
||
{
|
||
/*
|
||
* data is an array of GdkAtom, we need to convert it
|
||
* to an array of X Atoms
|
||
*/
|
||
gint i;
|
||
GdkAtom *atoms = (GdkAtom*) data;
|
||
Atom *xatoms;
|
||
|
||
xatoms = g_new (Atom, nelements);
|
||
for (i = 0; i < nelements; i++)
|
||
xatoms[i] = gdk_x11_atom_to_xatom_for_display (display, atoms[i]);
|
||
|
||
XChangeProperty (GDK_DISPLAY_XDISPLAY (display), xwindow,
|
||
xproperty, xtype,
|
||
format, mode, (guchar *)xatoms, nelements);
|
||
g_free (xatoms);
|
||
}
|
||
else
|
||
XChangeProperty (GDK_DISPLAY_XDISPLAY (display), xwindow, xproperty,
|
||
xtype, format, mode, (guchar *)data, nelements);
|
||
}
|
||
|
||
void
|
||
_gdk_x11_window_delete_property (GdkWindow *window,
|
||
GdkAtom property)
|
||
{
|
||
g_return_if_fail (!window || GDK_WINDOW_IS_X11 (window));
|
||
|
||
if (!window)
|
||
window = gdk_display_get_root_window (gdk_display_get_default ());
|
||
else if (!GDK_WINDOW_IS_X11 (window))
|
||
return;
|
||
|
||
if (GDK_WINDOW_DESTROYED (window))
|
||
return;
|
||
|
||
XDeleteProperty (GDK_WINDOW_XDISPLAY (window), GDK_WINDOW_XID (window),
|
||
gdk_x11_atom_to_xatom_for_display (GDK_WINDOW_DISPLAY (window),
|
||
property));
|
||
}
|