src/gtk/eggtrayicon.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /* eggtrayicon.c
   3  * Copyright (C) 2002 Anders Carlsson <andersca@gnu.org>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22
  23 Permission to use this file under wxWindows license given by
  24 copyright holder:
  25 --------
  26 From andersca@gnu.org Tue Dec  9 13:01:56 2003
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  61 Subject: Re: eggtrayicon.{c,h} licensing
  62 From: Anders Carlsson <andersca@gnu.org>
  63 To: Vaclav Slavik <vaclav.slavik@matfyz.cz>
  64 In-Reply-To: <200312091142.54542.vaclav.slavik@matfyz.cz>
  65 References: <200312091142.54542.vaclav.slavik@matfyz.cz>
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  80
  81 On tis, 2003-12-09 at 11:42 +0100, Vaclav Slavik wrote:
  82 > Hi,
  83 >
  84 > I'm working on the wxWindows cross-platform GUI toolkit
  85 > (http://www.wxwindows.org) which uses GTK+ and it would save me a lot
  86 > of time if I could use your eggtrayicon code to implement tray icons
  87 > on X11. Unfortunately I can't use it right now because it is not part
  88 > of any library we could depend on (as we do depend on GTK+) and would
  89 > have to be included in our sources and it is under the LGPL license.
  90 > The problem is that wxWindows' license is more permissive (see
  91 > http://www.opensource.org/licenses/wxwindows.php for details) and so
  92 > I can't take your code and put it under wxWindows License. And I
  93 > can't put code that can't be used under the terms of wxWindows
  94 > License into wxWindows either. Do you think it would be possible to
  95 > get permission to include eggtrayicon under wxWindows license?
  96 >
  97 > Thanks,
  98 > Vaclav
  99 >
 100
 101 Sure, that's fine by me.
 102
 103 Anders
 104 --------
 105 */
 106
 107 #include "wx/platform.h"
 108
 109 #ifdef __WXGTK20__
 110
 111 #include <string.h>
 112 #include <gdk/gdkx.h>
 113 #include "eggtrayicon.h"
 114
 115 #define SYSTEM_TRAY_REQUEST_DOCK    0
 116 #define SYSTEM_TRAY_BEGIN_MESSAGE   1
 117 #define SYSTEM_TRAY_CANCEL_MESSAGE  2
 118
 119 static GtkPlugClass *parent_class = NULL;
 120
 121 static void egg_tray_icon_init (EggTrayIcon *icon);
 122 static void egg_tray_icon_class_init (EggTrayIconClass *klass);
 123
 124 static void egg_tray_icon_unrealize (GtkWidget *widget);
 125
 126 static void egg_tray_icon_update_manager_window (EggTrayIcon *icon);
 127
 128 GType
 129 egg_tray_icon_get_type (void)
 130 {
 131   static GType our_type = 0;
 132
 133   if (our_type == 0)
 134     {
 135       static const GTypeInfo our_info =
 136       {
 137         sizeof (EggTrayIconClass),
 138         (GBaseInitFunc) NULL,
 139         (GBaseFinalizeFunc) NULL,
 140         (GClassInitFunc) egg_tray_icon_class_init,
 141         NULL, /* class_finalize */
 142         NULL, /* class_data */
 143         sizeof (EggTrayIcon),
 144         0,    /* n_preallocs */
 145         (GInstanceInitFunc) egg_tray_icon_init
 146       };
 147
 148       our_type = g_type_register_static (GTK_TYPE_PLUG, "EggTrayIcon", &our_info, 0);
 149     }
 150
 151   return our_type;
 152 }
 153
 154 static void
 155 egg_tray_icon_init (EggTrayIcon *icon)
 156 {
 157   icon->stamp = 1;
 158
 159   gtk_widget_add_events (GTK_WIDGET (icon), GDK_PROPERTY_CHANGE_MASK);
 160 }
 161
 162 static void
 163 egg_tray_icon_class_init (EggTrayIconClass *klass)
 164 {
 165   GtkWidgetClass *widget_class = (GtkWidgetClass *)klass;
 166
 167   parent_class = g_type_class_peek_parent (klass);
 168
 169   widget_class->unrealize = egg_tray_icon_unrealize;
 170 }
 171
 172 static GdkFilterReturn
 173 egg_tray_icon_manager_filter (GdkXEvent *xevent, GdkEvent *event, gpointer user_data)
 174 {
 175   EggTrayIcon *icon = user_data;
 176   XEvent *xev = (XEvent *)xevent;
 177
 178   if (xev->xany.type == ClientMessage &&
 179       xev->xclient.message_type == icon->manager_atom &&
 180       xev->xclient.data.l[1] == icon->selection_atom)
 181     {
 182       egg_tray_icon_update_manager_window (icon);
 183     }
 184   else if (xev->xany.window == icon->manager_window)
 185     {
 186       if (xev->xany.type == DestroyNotify)
 187         {
 188           egg_tray_icon_update_manager_window (icon);
 189         }
 190     }
 191
 192   return GDK_FILTER_CONTINUE;
 193 }
 194
 195 static void
 196 egg_tray_icon_unrealize (GtkWidget *widget)
 197 {
 198   EggTrayIcon *icon = EGG_TRAY_ICON (widget);
 199   GdkWindow *root_window;
 200
 201   if (icon->manager_window != None)
 202     {
 203       GdkWindow *gdkwin;
 204
 205       gdkwin = gdk_window_lookup_for_display (gtk_widget_get_display (widget),
 206                                               icon->manager_window);
 207
 208       gdk_window_remove_filter (gdkwin, egg_tray_icon_manager_filter, icon);
 209     }
 210
 211   root_window = gdk_screen_get_root_window (gtk_widget_get_screen (widget));
 212
 213   gdk_window_remove_filter (root_window, egg_tray_icon_manager_filter, icon);
 214
 215   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 216     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 217 }
 218
 219 static void
 220 egg_tray_icon_send_manager_message (EggTrayIcon *icon,
 221                                     long         message,
 222                                     Window       window,
 223                                     long         data1,
 224                                     long         data2,
 225                                     long         data3)
 226 {
 227   XClientMessageEvent ev;
 228   Display *display;
 229
 230   ev.type = ClientMessage;
 231   ev.window = window;
 232   ev.message_type = icon->system_tray_opcode_atom;
 233   ev.format = 32;
 234   ev.data.l[0] = gdk_x11_get_server_time (GTK_WIDGET (icon)->window);
 235   ev.data.l[1] = message;
 236   ev.data.l[2] = data1;
 237   ev.data.l[3] = data2;
 238   ev.data.l[4] = data3;
 239
 240   display = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
 241
 242   gdk_error_trap_push ();
 243   XSendEvent (display,
 244               icon->manager_window, False, NoEventMask, (XEvent *)&ev);
 245   XSync (display, False);
 246   gdk_error_trap_pop ();
 247 }
 248
 249 static void
 250 egg_tray_icon_send_dock_request (EggTrayIcon *icon)
 251 {
 252   egg_tray_icon_send_manager_message (icon,
 253                                       SYSTEM_TRAY_REQUEST_DOCK,
 254                                       icon->manager_window,
 255                                       gtk_plug_get_id (GTK_PLUG (icon)),
 256                                       0, 0);
 257 }
 258
 259 static void
 260 egg_tray_icon_update_manager_window (EggTrayIcon *icon)
 261 {
 262   Display *xdisplay;
 263
 264   xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
 265
 266   if (icon->manager_window != None)
 267     {
 268       GdkWindow *gdkwin;
 269
 270       gdkwin = gdk_window_lookup_for_display (gtk_widget_get_display (GTK_WIDGET (icon)),
 271                                               icon->manager_window);
 272
 273       gdk_window_remove_filter (gdkwin, egg_tray_icon_manager_filter, icon);
 274     }
 275
 276   XGrabServer (xdisplay);
 277
 278   icon->manager_window = XGetSelectionOwner (xdisplay,
 279                                              icon->selection_atom);
 280
 281   if (icon->manager_window != None)
 282     XSelectInput (xdisplay,
 283                   icon->manager_window, StructureNotifyMask);
 284
 285   XUngrabServer (xdisplay);
 286   XFlush (xdisplay);
 287
 288   if (icon->manager_window != None)
 289     {
 290       GdkWindow *gdkwin;
 291
 292       gdkwin = gdk_window_lookup_for_display (gtk_widget_get_display (GTK_WIDGET (icon)),
 293                                               icon->manager_window);
 294
 295       gdk_window_add_filter (gdkwin, egg_tray_icon_manager_filter, icon);
 296
 297       /* Send a request that we'd like to dock */
 298       egg_tray_icon_send_dock_request (icon);
 299     }
 300 }
 301
 302 EggTrayIcon *
 303 egg_tray_icon_new_for_xscreen (Screen *xscreen, const char *name)
 304 {
 305   EggTrayIcon *icon;
 306   char buffer[256];
 307   GdkWindow *root_window;
 308   GdkDisplay *display;
 309   GdkScreen *screen;
 310
 311   g_return_val_if_fail (xscreen != NULL, NULL);
 312
 313   icon = g_object_new (EGG_TYPE_TRAY_ICON, NULL);
 314   gtk_window_set_title (GTK_WINDOW (icon), name);
 315
 316   display = gdk_x11_lookup_xdisplay (DisplayOfScreen (xscreen));
 317   screen = gdk_display_get_screen (display, XScreenNumberOfScreen (xscreen));
 318
 319   gtk_plug_construct_for_display (GTK_PLUG (icon),
 320                                   display, 0);
 321
 322   gtk_window_set_screen (GTK_WINDOW (icon), screen);
 323
 324   gtk_widget_realize (GTK_WIDGET (icon));
 325
 326   /* Now see if there's a manager window around */
 327   g_snprintf (buffer, sizeof (buffer),
 328               "_NET_SYSTEM_TRAY_S%d",
 329               XScreenNumberOfScreen (xscreen));
 330
 331   icon->selection_atom = XInternAtom (DisplayOfScreen (xscreen),
 332                                       buffer, False);
 333
 334   icon->manager_atom = XInternAtom (DisplayOfScreen (xscreen),
 335                                     "MANAGER", False);
 336
 337   icon->system_tray_opcode_atom = XInternAtom (DisplayOfScreen (xscreen),
 338                                                "_NET_SYSTEM_TRAY_OPCODE", False);
 339
 340   egg_tray_icon_update_manager_window (icon);
 341
 342   root_window = gdk_screen_get_root_window (gtk_widget_get_screen (GTK_WIDGET (icon)));
 343
 344   /* Add a root window filter so that we get changes on MANAGER */
 345   gdk_window_add_filter (root_window,
 346                          egg_tray_icon_manager_filter, icon);
 347
 348   return icon;
 349 }
 350
 351 EggTrayIcon *
 352 egg_tray_icon_new_for_screen (GdkScreen *screen, const char *name)
 353 {
 354   g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
 355
 356   return egg_tray_icon_new_for_xscreen (GDK_SCREEN_XSCREEN (screen), name);
 357 }
 358
 359 EggTrayIcon*
 360 egg_tray_icon_new (const gchar *name)
 361 {
 362   return egg_tray_icon_new_for_xscreen (DefaultScreenOfDisplay (gdk_display), name);
 363 }
 364
 365 guint
 366 egg_tray_icon_send_message (EggTrayIcon *icon,
 367                             gint         timeout,
 368                             const gchar *message,
 369                             gint         len)
 370 {
 371   guint stamp;
 372
 373   g_return_val_if_fail (EGG_IS_TRAY_ICON (icon), 0);
 374   g_return_val_if_fail (timeout >= 0, 0);
 375   g_return_val_if_fail (message != NULL, 0);
 376
 377   if (icon->manager_window == None)
 378     return 0;
 379
 380   if (len < 0)
 381     len = strlen (message);
 382
 383   stamp = icon->stamp++;
 384
 385   /* Get ready to send the message */
 386   egg_tray_icon_send_manager_message (icon, SYSTEM_TRAY_BEGIN_MESSAGE,
 387                                       (Window)gtk_plug_get_id (GTK_PLUG (icon)),
 388                                       timeout, len, stamp);
 389
 390   /* Now to send the actual message */
 391   gdk_error_trap_push ();
 392   while (len > 0)
 393     {
 394       XClientMessageEvent ev;
 395       Display *xdisplay;
 396
 397       xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
 398
 399       ev.type = ClientMessage;
 400       ev.window = (Window)gtk_plug_get_id (GTK_PLUG (icon));
 401       ev.format = 8;
 402       ev.message_type = XInternAtom (xdisplay,
 403                                      "_NET_SYSTEM_TRAY_MESSAGE_DATA", False);
 404       if (len > 20)
 405         {
 406           memcpy (&ev.data, message, 20);
 407           len -= 20;
 408           message += 20;
 409         }
 410       else
 411         {
 412           memcpy (&ev.data, message, len);
 413           len = 0;
 414         }
 415
 416       XSendEvent (xdisplay,
 417                   icon->manager_window, False, StructureNotifyMask, (XEvent *)&ev);
 418       XSync (xdisplay, False);
 419     }
 420   gdk_error_trap_pop ();
 421
 422   return stamp;
 423 }
 424
 425 void
 426 egg_tray_icon_cancel_message (EggTrayIcon *icon,
 427                               guint        id)
 428 {
 429   g_return_if_fail (EGG_IS_TRAY_ICON (icon));
 430   g_return_if_fail (id > 0);
 431
 432   egg_tray_icon_send_manager_message (icon, SYSTEM_TRAY_CANCEL_MESSAGE,
 433                                       (Window)gtk_plug_get_id (GTK_PLUG (icon)),
 434                                       id, 0, 0);
 435 }
 436
 437 #endif /* __WXGTK20__ */