path: root/shell/e-shell-meego.c

/*
 * e-shell-meego.c
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * This program 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 * Inspired by mx's mx-application.c by
 *  Thomas Wood <thomas.wood@intel.com>,
 *  Chris Lord  <chris@linux.intel.com>
 */

#include <glib.h>
#include <e-shell-meego.h>

#ifndef G_OS_WIN32
#include <gdk/gdkx.h>
#include <X11/Xatom.h>
#endif

#ifdef G_OS_WIN32
void
e_shell_detect_meego (gboolean *is_meego,
                      gboolean *small_screen)
{
    *is_meego = *small_screen = FALSE;
}
#else
void
e_shell_detect_meego (gboolean *is_meego,
                      gboolean *small_screen)
{
    Window *wm_window_v = NULL;
    guchar *moblin_string = NULL;
    GModule *module = NULL;
    /*
     * Wow - this is unpleasant, but it is hard to link directly
     * to the X libraries, and we have to use XGetWindowProperty
     * to get to the (mind-mashed) 'supporting' window.
     */
    struct {
      gint (*XFree) (gpointer);
      gint (*XGetWindowProperty) (Display*, XID, Atom, long, long, Bool,
                     Atom, Atom *, gint *, unsigned long*,
                     unsigned long*, guchar **);
    } fns = { 0, 0 };

    *is_meego = *small_screen = FALSE;

    moblin_string = (guchar *)g_getenv ("EVO_MEEGO");
    if (!moblin_string) {
        GdkScreen *screen;
        GdkDisplay *display;
        GdkAtom wm_win, mob_atom;
        Atom dummy_t;
        unsigned long dummy_l;
        gint dummy_i;

        if (!gdk_display_get_default ())
            return;

        wm_win = gdk_atom_intern ("_NET_SUPPORTING_WM_CHECK", TRUE);
        mob_atom = gdk_atom_intern ("_MOBLIN", TRUE);
        if (!wm_win || !mob_atom)
            return;

        module = g_module_open (NULL, 0);
        if (!module)
            return;
        g_module_symbol (module, "XFree", (gpointer) &fns.XFree);
        g_module_symbol (module, "XGetWindowProperty",
                 (gpointer) &fns.XGetWindowProperty);
        if (!fns.XFree || !fns.XGetWindowProperty) {
            fprintf (stderr, "defective X server\n");
            goto exit;
        }

        display = gdk_display_get_default ();
        screen = gdk_display_get_default_screen (gdk_display_get_default ());

        gdk_error_trap_push ();

        /* get the window manager's supporting window */
        fns.XGetWindowProperty (gdk_x11_display_get_xdisplay (display),
                    GDK_WINDOW_XID (gdk_screen_get_root_window (screen)),
                    gdk_x11_atom_to_xatom_for_display (display, wm_win),
                    0, 1, False, XA_WINDOW, &dummy_t, &dummy_i,
                    &dummy_l, &dummy_l, (guchar **)(&wm_window_v));

        /* get the '_Moblin' setting */
        if (wm_window_v && (*wm_window_v != None))
            fns.XGetWindowProperty (gdk_x11_display_get_xdisplay (display), *wm_window_v,
                        gdk_x11_atom_to_xatom_for_display (display, mob_atom),
                        0, 8192, False, XA_STRING,
                        &dummy_t, &dummy_i, &dummy_l, &dummy_l,
                        &moblin_string);

        gdk_error_trap_pop ();
    }

    if (moblin_string) {
        gint i;
        gchar **props;

        g_warning ("prop '%s'", moblin_string);

        /* use meego theming tweaks */
        *is_meego = TRUE;

        props = g_strsplit ((gchar *)moblin_string, ":", -1);
        for (i = 0; props && props[i]; i++) {
            gchar **pair = g_strsplit (props[i], "=", 2);

            g_warning ("pair '%s'='%s'", pair ? pair[0] : "<null>",
                   pair && pair[0] ? pair[1] : "<null>");

            /* Hunt for session-type=small-screen */
            if (pair && pair[0] && !g_ascii_strcasecmp (pair[0], "session-type"))
                *small_screen = !g_ascii_strcasecmp (pair[1], "small-screen");
            g_strfreev (pair);
        }
        g_strfreev (props);
        if (fns.XFree)
            fns.XFree (moblin_string);
    }

 exit:
    if (wm_window_v)
        fns.XFree (wm_window_v);
    if (module)
        g_module_close (module);
}
#endif

#ifdef TEST_APP
/* gcc -g -O0 -Wall -I. -DTEST_APP `pkg-config --cflags --libs gtk+-2.0`
 *     e-shell-meego.c && ./a.out */
#include <gtk/gtk.h>

gint main (gint argc, gchar **argv)
{
    gboolean is_meego, small_screen;

    gtk_init (&argc, &argv);

    e_shell_detect_meego (&is_meego, &small_screen);
    fprintf (stderr, "Meego ? %d small ? %d\n", is_meego, small_screen);

    return 0;
}
#endif