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path: root/src/core/eggtrayicon.c
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/*
     This file is part of GNUnet.
     (C) 2006 Christian Grothoff (and other contributing authors)

     GNUnet 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, or (at your
     option) any later version.

     GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
*/
/*
 * @file src/core/eggtrayicon.c
 * @brief adds a system tray icon
 * @author Anders Carlsson
 * @author Christian Grothoff (minor modifications and code clean up)
 */

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* eggtrayicon.c
 * Copyright (C) 2002 Anders Carlsson <andersca@gnu.org>
 *
 * This library 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) 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include "platform.h"
#include "gnunetgtk_common.h"
#include "eggtrayicon.h"


#include <gtk/gtkplug.h>
#include <gtk/gtkversion.h>
#include <gdk/gdkx.h>
#include <X11/Xatom.h>

G_BEGIN_DECLS
#define EGG_TYPE_TRAY_ICON		(egg_tray_icon_get_type ())
#define EGG_TRAY_ICON(obj)		(G_TYPE_CHECK_INSTANCE_CAST ((obj), EGG_TYPE_TRAY_ICON, EggTrayIcon))
#define EGG_TRAY_ICON_CLASS(klass)	(G_TYPE_CHECK_CLASS_CAST ((klass), EGG_TYPE_TRAY_ICON, EggTrayIconClass))
#define EGG_IS_TRAY_ICON(obj)		(G_TYPE_CHECK_INSTANCE_TYPE ((obj), EGG_TYPE_TRAY_ICON))
#define EGG_IS_TRAY_ICON_CLASS(klass)	(G_TYPE_CHECK_CLASS_TYPE ((klass), EGG_TYPE_TRAY_ICON))
#define EGG_TRAY_ICON_GET_CLASS(obj)	(G_TYPE_INSTANCE_GET_CLASS ((obj), EGG_TYPE_TRAY_ICON, EggTrayIconClass))
typedef struct _EggTrayIcon EggTrayIcon;
typedef struct _EggTrayIconClass EggTrayIconClass;

struct _EggTrayIcon
{
  GtkPlug parent_instance;

  guint stamp;

  Atom selection_atom;
  Atom manager_atom;
  Atom system_tray_opcode_atom;
  Atom orientation_atom;
  Window manager_window;

  GtkOrientation orientation;
};

struct _EggTrayIconClass
{
  GtkPlugClass parent_class;
};

GType egg_tray_icon_get_type (void);

#if GTK_CHECK_VERSION(2,1,0)
EggTrayIcon *egg_tray_icon_new_for_screen (GdkScreen * screen,
                                           const gchar * name);
#endif

EggTrayIcon *egg_tray_icon_new (const gchar * name);

guint egg_tray_icon_send_message (EggTrayIcon * icon,
                                  gint timeout,
                                  const char *message, gint len);
void egg_tray_icon_cancel_message (EggTrayIcon * icon, guint id);

GtkOrientation egg_tray_icon_get_orientation (EggTrayIcon * icon);


static gboolean tray_clicked (GtkWidget * trayContextMenu, GdkEvent * event);
static gboolean on_tray_quit_activate (GtkWidget * widget, GdkEvent * event,
                                       gpointer data);

G_END_DECLS
#define SYSTEM_TRAY_REQUEST_DOCK    0
#define SYSTEM_TRAY_BEGIN_MESSAGE   1
#define SYSTEM_TRAY_CANCEL_MESSAGE  2
#define SYSTEM_TRAY_ORIENTATION_HORZ 0
#define SYSTEM_TRAY_ORIENTATION_VERT 1
  enum
{
  PROP_0,
  PROP_ORIENTATION
};

static GtkPlugClass *parent_class = NULL;

static void egg_tray_icon_init (EggTrayIcon * icon);
static void egg_tray_icon_class_init (EggTrayIconClass * klass);

static void egg_tray_icon_get_property (GObject * object,
                                        guint prop_id,
                                        GValue * value, GParamSpec * pspec);

static void egg_tray_icon_realize (GtkWidget * widget);
static void egg_tray_icon_unrealize (GtkWidget * widget);

static void egg_tray_icon_update_manager_window (EggTrayIcon * icon,
                                                 gboolean dock_if_realized);
static void egg_tray_icon_manager_window_destroyed (EggTrayIcon * icon);

static Display *
getDisplay (GtkWidget * w)
{
#if GTK_CHECK_VERSION(2,1,0)
  return GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (w));
#else
  return gdk_display;
#endif
}

static GdkWindow *
getWindow (EggTrayIcon * icon)
{
#if GTK_CHECK_VERSION(2,1,0)
  return
    gdk_window_lookup_for_display (gtk_widget_get_display (GTK_WIDGET (icon)),
                                   icon->manager_window);
#else
  return gdk_window_lookup (icon->manager_window);
#endif
}

GType
egg_tray_icon_get_type (void)
{
  static GType our_type = 0;

  if (our_type == 0)
    {
      our_type = g_type_from_name ("EggTrayIcon");

      if (our_type == 0)
        {
          static const GTypeInfo our_info = {
            sizeof (EggTrayIconClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) egg_tray_icon_class_init,
            NULL,               /* class_finalize */
            NULL,               /* class_data */
            sizeof (EggTrayIcon),
            0,                  /* n_preallocs */
            (GInstanceInitFunc) egg_tray_icon_init,
            NULL                /* value_table */
          };

          our_type =
            g_type_register_static (GTK_TYPE_PLUG, "EggTrayIcon", &our_info,
                                    0);
        }
      else if (parent_class == NULL)
        {
          /* we're reheating the old class from a previous instance -  engage ugly hack =( */
          egg_tray_icon_class_init ((EggTrayIconClass *)
                                    g_type_class_peek (our_type));
        }
    }

  return our_type;
}

static void
egg_tray_icon_init (EggTrayIcon * icon)
{
  icon->stamp = 1;
  icon->orientation = GTK_ORIENTATION_HORIZONTAL;

  gtk_widget_add_events (GTK_WIDGET (icon), GDK_PROPERTY_CHANGE_MASK);
}

static void
egg_tray_icon_class_init (EggTrayIconClass * klass)
{
  GObjectClass *gobject_class = (GObjectClass *) klass;
  GtkWidgetClass *widget_class = (GtkWidgetClass *) klass;

  parent_class = g_type_class_peek_parent (klass);

  gobject_class->get_property = egg_tray_icon_get_property;

  widget_class->realize = egg_tray_icon_realize;
  widget_class->unrealize = egg_tray_icon_unrealize;

  g_object_class_install_property (gobject_class,
                                   PROP_ORIENTATION,
                                   g_param_spec_enum ("orientation",
                                                      _("Orientation"),
                                                      _
                                                      ("The orientation of the tray."),
                                                      GTK_TYPE_ORIENTATION,
                                                      GTK_ORIENTATION_HORIZONTAL,
                                                      G_PARAM_READABLE));
}

static void
egg_tray_icon_get_property (GObject * object,
                            guint prop_id, GValue * value, GParamSpec * pspec)
{
  EggTrayIcon *icon = EGG_TRAY_ICON (object);

  switch (prop_id)
    {
    case PROP_ORIENTATION:
      g_value_set_enum (value, icon->orientation);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

static void
egg_tray_icon_get_orientation_property (EggTrayIcon * icon)
{
  Display *xdisplay;
  Atom type;
  int format;
  union
  {
    gulong *prop;
    guchar *prop_ch;
  } prop =
  {
  NULL};
  gulong nitems;
  gulong bytes_after;
  int error, result;

  g_return_if_fail (icon->manager_window != None);

  xdisplay = getDisplay (GTK_WIDGET (icon));

  gdk_error_trap_push ();
  type = None;
  result = XGetWindowProperty (xdisplay,
                               icon->manager_window,
                               icon->orientation_atom,
                               0, G_MAXLONG, FALSE,
                               XA_CARDINAL,
                               &type, &format, &nitems,
                               &bytes_after, &(prop.prop_ch));
  error = gdk_error_trap_pop ();

  if (error || result != Success)
    return;

  if (type == XA_CARDINAL)
    {
      GtkOrientation orientation;

      orientation = (prop.prop[0] == SYSTEM_TRAY_ORIENTATION_HORZ) ?
        GTK_ORIENTATION_HORIZONTAL : GTK_ORIENTATION_VERTICAL;

      if (icon->orientation != orientation)
        {
          icon->orientation = orientation;

          g_object_notify (G_OBJECT (icon), "orientation");
        }
    }

  if (prop.prop)
    XFree (prop.prop);
}

static GdkFilterReturn
egg_tray_icon_manager_filter (GdkXEvent * xevent, GdkEvent * event,
                              gpointer user_data)
{
  EggTrayIcon *icon = user_data;
  XEvent *xev = (XEvent *) xevent;

  if (xev->xany.type == ClientMessage &&
      xev->xclient.message_type == icon->manager_atom &&
      xev->xclient.data.l[1] == icon->selection_atom)
    {
      egg_tray_icon_update_manager_window (icon, TRUE);
    }
  else if (xev->xany.window == icon->manager_window)
    {
      if (xev->xany.type == PropertyNotify &&
          xev->xproperty.atom == icon->orientation_atom)
        {
          egg_tray_icon_get_orientation_property (icon);
        }
      if (xev->xany.type == DestroyNotify)
        {
          egg_tray_icon_manager_window_destroyed (icon);
        }
    }

  return GDK_FILTER_CONTINUE;
}

static void
egg_tray_icon_unrealize (GtkWidget * widget)
{
  EggTrayIcon *icon = EGG_TRAY_ICON (widget);
  GdkWindow *root_window;

  if (icon->manager_window != None)
    {
      GdkWindow *gdkwin;

      gdkwin = getWindow (icon);
      gdk_window_remove_filter (gdkwin, egg_tray_icon_manager_filter, icon);
    }

#if GTK_CHECK_VERSION(2,1,0)
  root_window = gdk_screen_get_root_window (gtk_widget_get_screen (widget));
#else
  root_window = gdk_window_lookup (gdk_x11_get_default_root_xwindow ());
#endif

  gdk_window_remove_filter (root_window, egg_tray_icon_manager_filter, icon);

  if (GTK_WIDGET_CLASS (parent_class)->unrealize)
    (*GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
}

static void
egg_tray_icon_send_manager_message (EggTrayIcon * icon,
                                    long message,
                                    Window window,
                                    long data1, long data2, long data3)
{
  XClientMessageEvent ev;
  Display *display;

  ev.type = ClientMessage;
  ev.window = window;
  ev.message_type = icon->system_tray_opcode_atom;
  ev.format = 32;
  ev.data.l[0] = gdk_x11_get_server_time (GTK_WIDGET (icon)->window);
  ev.data.l[1] = message;
  ev.data.l[2] = data1;
  ev.data.l[3] = data2;
  ev.data.l[4] = data3;

  display = getDisplay (GTK_WIDGET (icon));

  gdk_error_trap_push ();
  XSendEvent (display,
              icon->manager_window, False, NoEventMask, (XEvent *) & ev);
  XSync (display, False);
  gdk_error_trap_pop ();
}

static void
egg_tray_icon_send_dock_request (EggTrayIcon * icon)
{
  egg_tray_icon_send_manager_message (icon,
                                      SYSTEM_TRAY_REQUEST_DOCK,
                                      icon->manager_window,
                                      gtk_plug_get_id (GTK_PLUG (icon)),
                                      0, 0);
}

static void
egg_tray_icon_update_manager_window (EggTrayIcon * icon,
                                     gboolean dock_if_realized)
{
  Display *xdisplay;

  if (icon->manager_window != None)
    return;

  xdisplay = getDisplay (GTK_WIDGET (icon));
  XGrabServer (xdisplay);

  icon->manager_window = XGetSelectionOwner (xdisplay, icon->selection_atom);

  if (icon->manager_window != None)
    XSelectInput (xdisplay,
                  icon->manager_window,
                  StructureNotifyMask | PropertyChangeMask);

  XUngrabServer (xdisplay);
  XFlush (xdisplay);

  if (icon->manager_window != None)
    {
      GdkWindow *gdkwin;

      gdkwin = getWindow (icon);
      gdk_window_add_filter (gdkwin, egg_tray_icon_manager_filter, icon);

      if (dock_if_realized && GTK_WIDGET_REALIZED (icon))
        egg_tray_icon_send_dock_request (icon);

      egg_tray_icon_get_orientation_property (icon);
    }
}

static void
egg_tray_icon_manager_window_destroyed (EggTrayIcon * icon)
{
  GdkWindow *gdkwin;

  g_return_if_fail (icon->manager_window != None);

  gdkwin = getWindow (icon);
  gdk_window_remove_filter (gdkwin, egg_tray_icon_manager_filter, icon);

  icon->manager_window = None;

  egg_tray_icon_update_manager_window (icon, TRUE);
}

static void
egg_tray_icon_realize (GtkWidget * widget)
{
  EggTrayIcon *icon = EGG_TRAY_ICON (widget);
  gint screen;
  Display *xdisplay;
  char buffer[256];
  GdkWindow *root_window;

  if (GTK_WIDGET_CLASS (parent_class)->realize)
    GTK_WIDGET_CLASS (parent_class)->realize (widget);

#if GTK_CHECK_VERSION(2,1,0)
  screen = gdk_screen_get_number (gtk_widget_get_screen (widget));
  xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (widget));
#else
  screen = XScreenNumberOfScreen (DefaultScreenOfDisplay (gdk_display));
  xdisplay = gdk_display;
#endif

  /* Now see if there's a manager window around */
  g_snprintf (buffer, sizeof (buffer), "_NET_SYSTEM_TRAY_S%d", screen);

  icon->selection_atom = XInternAtom (xdisplay, buffer, False);

  icon->manager_atom = XInternAtom (xdisplay, "MANAGER", False);

  icon->system_tray_opcode_atom = XInternAtom (xdisplay,
                                               "_NET_SYSTEM_TRAY_OPCODE",
                                               False);

  icon->orientation_atom = XInternAtom (xdisplay,
                                        "_NET_SYSTEM_TRAY_ORIENTATION",
                                        False);

  egg_tray_icon_update_manager_window (icon, FALSE);
  egg_tray_icon_send_dock_request (icon);

#if GTK_CHECK_VERSION(2,1,0)
  root_window = gdk_screen_get_root_window (gtk_widget_get_screen (widget));
#else
  root_window = gdk_window_lookup (gdk_x11_get_default_root_xwindow ());
#endif

  /* Add a root window filter so that we get changes on MANAGER */
  gdk_window_add_filter (root_window, egg_tray_icon_manager_filter, icon);
}

#if GTK_CHECK_VERSION(2,1,0)
EggTrayIcon *
egg_tray_icon_new_for_screen (GdkScreen * screen, const char *name)
{
  g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);

  return g_object_new (EGG_TYPE_TRAY_ICON, "screen", screen, "title", name,
                       NULL);
}
#endif

EggTrayIcon *
egg_tray_icon_new (const gchar * name)
{
  return g_object_new (EGG_TYPE_TRAY_ICON, "title", name, NULL);
}

guint
egg_tray_icon_send_message (EggTrayIcon * icon,
                            gint timeout, const gchar * message, gint len)
{
  guint stamp;

  g_return_val_if_fail (EGG_IS_TRAY_ICON (icon), 0);
  g_return_val_if_fail (timeout >= 0, 0);
  g_return_val_if_fail (message != NULL, 0);

  if (icon->manager_window == None)
    return 0;

  if (len < 0)
    len = strlen (message);

  stamp = icon->stamp++;

  /* Get ready to send the message */
  egg_tray_icon_send_manager_message (icon, SYSTEM_TRAY_BEGIN_MESSAGE,
                                      (Window)
                                      gtk_plug_get_id (GTK_PLUG (icon)),
                                      timeout, len, stamp);

  /* Now to send the actual message */
  gdk_error_trap_push ();
  while (len > 0)
    {
      XClientMessageEvent ev;
      Display *xdisplay;

      xdisplay = getDisplay (GTK_WIDGET (icon));

      ev.type = ClientMessage;
      ev.window = (Window) gtk_plug_get_id (GTK_PLUG (icon));
      ev.format = 8;
      ev.message_type = XInternAtom (xdisplay,
                                     "_NET_SYSTEM_TRAY_MESSAGE_DATA", False);
      if (len > 20)
        {
          memcpy (&ev.data, message, 20);
          len -= 20;
          message += 20;
        }
      else
        {
          memcpy (&ev.data, message, len);
          len = 0;
        }

      XSendEvent (xdisplay,
                  icon->manager_window, False, StructureNotifyMask,
                  (XEvent *) & ev);
      XSync (xdisplay, False);
    }
  gdk_error_trap_pop ();

  return stamp;
}

void
egg_tray_icon_cancel_message (EggTrayIcon * icon, guint id)
{
  g_return_if_fail (EGG_IS_TRAY_ICON (icon));
  g_return_if_fail (id > 0);

  egg_tray_icon_send_manager_message (icon, SYSTEM_TRAY_CANCEL_MESSAGE,
                                      (Window)
                                      gtk_plug_get_id (GTK_PLUG (icon)), id,
                                      0, 0);
}

GtkOrientation
egg_tray_icon_get_orientation (EggTrayIcon * icon)
{
  g_return_val_if_fail (EGG_IS_TRAY_ICON (icon), GTK_ORIENTATION_HORIZONTAL);

  return icon->orientation;
}


/* Callback for the "Quit" element on the tray icon menu */
static gboolean
on_tray_quit_activate (GtkWidget * widget, GdkEvent * event, gpointer data)
{
  gnunet_gtk_main_quit ();
  return TRUE;
}

/* Function activated when the user clicks the tray icon */
static gboolean
tray_clicked (GtkWidget * widget, GdkEvent * event)
{
  if (event->type == GDK_BUTTON_PRESS)
    {
      GdkEventButton *event_button;
      event_button = (GdkEventButton *) event;
      if (event_button->button == 1)
        {
          GtkWidget *root;
          root = glade_xml_get_widget (getMainXML (), "mainWindow");
          GdkWindowState main_window_state;
          if (gtk_window_is_active (GTK_WINDOW (root)))
            gtk_widget_hide (root);
          else
            gtk_window_present (GTK_WINDOW (root));
          main_window_state = getMainWindowState ();
          if (main_window_state & GDK_WINDOW_STATE_MAXIMIZED)
            gtk_window_maximize (GTK_WINDOW (root));
          return TRUE;
        }
      else if (event_button->button == 3)
        {
          GtkMenu *trayContextMenu;
          trayContextMenu = GTK_MENU (widget);
          g_return_val_if_fail (GTK_IS_MENU (trayContextMenu), FALSE);
          gtk_menu_popup (trayContextMenu, NULL, NULL, NULL, NULL,
                          event_button->button, event_button->time);
          return TRUE;
        }
    }
  return FALSE;
}

/* Initiate the system tray icon */
void
initTrayIcon ()
{
  static EggTrayIcon *tray_icon;
  static GtkWidget *tray_icon_image;
  static GtkTooltips *tray_icon_tooltip;
  GtkWidget *eventbox, *trayContextMenu, *tray_quit;
  GdkPixbuf *pixbuf;
  GladeXML *trayContextMenuXML;
  char *instDir;
  char *iconPath;

  trayContextMenuXML =
    glade_xml_new (getGladeFileName (), "trayContextMenu", PACKAGE_NAME);
  trayContextMenu =
    glade_xml_get_widget (trayContextMenuXML, "trayContextMenu");
  tray_quit = glade_xml_get_widget (trayContextMenuXML, "tray_quit");

  tray_icon = egg_tray_icon_new (_("GNU's p2p network"));
  instDir = os_get_installation_path (IPK_DATADIR);
  iconPath = MALLOC (strlen (instDir) + 40);
  strcpy (iconPath, instDir);
  strcat (iconPath, "/../gnunet-gtk/gnunet-gtk-tray.png");
  FREE (instDir);
  pixbuf = gdk_pixbuf_new_from_file (iconPath, NULL);
  FREE (iconPath);
  tray_icon_image = gtk_image_new_from_pixbuf (pixbuf);
  eventbox = gtk_event_box_new ();
  gtk_container_add (GTK_CONTAINER (eventbox), tray_icon_image);
  gtk_container_add (GTK_CONTAINER (tray_icon), eventbox);
  g_signal_connect (G_OBJECT (tray_quit), "activate",
                    G_CALLBACK (on_tray_quit_activate), NULL);
  g_signal_connect_swapped (G_OBJECT (eventbox), "button_press_event",
                            G_CALLBACK (tray_clicked), trayContextMenu);
  tray_icon_tooltip = gtk_tooltips_new ();
  gtk_tooltips_set_tip (tray_icon_tooltip, GTK_WIDGET (tray_icon),
                        _("GNU's p2p network"), NULL);
  gtk_widget_show (eventbox);
  gtk_widget_show_all (GTK_WIDGET (tray_icon));
}