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 #include <gdk/gdkx.h>
 110
 111 #ifdef __WXGTK20__
 112 #include <gtk/gtkversion.h>
 113 #if GTK_CHECK_VERSION(2, 1, 0)
 114
 115 #include <string.h>
 116 #include "eggtrayicon.h"
 117
 118 #define SYSTEM_TRAY_REQUEST_DOCK    0
 119 #define SYSTEM_TRAY_BEGIN_MESSAGE   1
 120 #define SYSTEM_TRAY_CANCEL_MESSAGE  2
 121
 122 static GtkPlugClass *parent_class = NULL;
 123
 124 static void egg_tray_icon_init (EggTrayIcon *icon);
 125 static void egg_tray_icon_class_init (EggTrayIconClass *klass);
 126
 127 static void egg_tray_icon_unrealize (GtkWidget *widget);
 128
 129 static void egg_tray_icon_update_manager_window (EggTrayIcon *icon);
 130
 131 GType
 132 egg_tray_icon_get_type (void)
 133 {
 134   static GType our_type = 0;
 135
 136   if (our_type == 0)
 137     {
 138       const GTypeInfo our_info =
 139       {
 140         sizeof (EggTrayIconClass),
 141         (GBaseInitFunc) NULL,
 142         (GBaseFinalizeFunc) NULL,
 143         (GClassInitFunc) egg_tray_icon_class_init,
 144         NULL, /* class_finalize */
 145         NULL, /* class_data */
 146         sizeof (EggTrayIcon),
 147         0,    /* n_preallocs */
 148         (GInstanceInitFunc) egg_tray_icon_init
 149       };
 150
 151       our_type = g_type_register_static (GTK_TYPE_PLUG, "EggTrayIcon",
 152                                           &our_info, (GTypeFlags)0);
 153     }
 154
 155   return our_type;
 156 }
 157
 158 static void
 159 egg_tray_icon_init (EggTrayIcon *icon)
 160 {
 161   icon->stamp = 1;
 162
 163   gtk_widget_add_events (GTK_WIDGET (icon), GDK_PROPERTY_CHANGE_MASK);
 164 }
 165
 166 static void
 167 egg_tray_icon_class_init (EggTrayIconClass *klass)
 168 {
 169   GtkWidgetClass *widget_class = (GtkWidgetClass *)klass;
 170
 171   parent_class = g_type_class_peek_parent (klass);
 172
 173   widget_class->unrealize = egg_tray_icon_unrealize;
 174 }
 175
 176 static GdkFilterReturn
 177 egg_tray_icon_manager_filter (GdkXEvent *xevent, GdkEvent *event, gpointer user_data)
 178 {
 179   EggTrayIcon *icon = user_data;
 180   XEvent *xev = (XEvent *)xevent;
 181
 182   if (xev->xany.type == ClientMessage &&
 183       xev->xclient.message_type == icon->manager_atom &&
 184       xev->xclient.data.l[1] == icon->selection_atom)
 185     {
 186       egg_tray_icon_update_manager_window (icon);
 187     }
 188   else if (xev->xany.window == icon->manager_window)
 189     {
 190       if (xev->xany.type == DestroyNotify)
 191         {
 192           egg_tray_icon_update_manager_window (icon);
 193         }
 194     }
 195
 196   return GDK_FILTER_CONTINUE;
 197 }
 198
 199 static void
 200 egg_tray_icon_unrealize (GtkWidget *widget)
 201 {
 202   EggTrayIcon *icon = EGG_TRAY_ICON (widget);
 203   GdkWindow *root_window;
 204
 205   if (icon->manager_window != None)
 206     {
 207       GdkWindow *gdkwin;
 208
 209       gdkwin = gdk_window_lookup_for_display (gtk_widget_get_display (widget),
 210                                               icon->manager_window);
 211
 212       gdk_window_remove_filter (gdkwin, egg_tray_icon_manager_filter, icon);
 213     }
 214
 215   root_window = gdk_screen_get_root_window (gtk_widget_get_screen (widget));
 216
 217   gdk_window_remove_filter (root_window, egg_tray_icon_manager_filter, icon);
 218
 219   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 220     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 221 }
 222
 223 static void
 224 egg_tray_icon_send_manager_message (EggTrayIcon *icon,
 225                                     long         message,
 226                                     Window       window,
 227                                     long         data1,
 228                                     long         data2,
 229                                     long         data3)
 230 {
 231   XClientMessageEvent ev;
 232   Display *display;
 233
 234   ev.type = ClientMessage;
 235   ev.window = window;
 236   ev.message_type = icon->system_tray_opcode_atom;
 237   ev.format = 32;
 238   ev.data.l[0] = gdk_x11_get_server_time (GTK_WIDGET (icon)->window);
 239   ev.data.l[1] = message;
 240   ev.data.l[2] = data1;
 241   ev.data.l[3] = data2;
 242   ev.data.l[4] = data3;
 243
 244   display = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
 245
 246   gdk_error_trap_push ();
 247   XSendEvent (display,
 248               icon->manager_window, False, NoEventMask, (XEvent *)&ev);
 249   XSync (display, False);
 250   gdk_error_trap_pop ();
 251 }
 252
 253 static void
 254 egg_tray_icon_send_dock_request (EggTrayIcon *icon)
 255 {
 256   egg_tray_icon_send_manager_message (icon,
 257                                       SYSTEM_TRAY_REQUEST_DOCK,
 258                                       icon->manager_window,
 259                                       gtk_plug_get_id (GTK_PLUG (icon)),
 260                                       0, 0);
 261 }
 262
 263 static void
 264 egg_tray_icon_update_manager_window (EggTrayIcon *icon)
 265 {
 266   Display *xdisplay;
 267
 268   xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
 269
 270   if (icon->manager_window != None)
 271     {
 272       GdkWindow *gdkwin;
 273
 274       gdkwin = gdk_window_lookup_for_display (gtk_widget_get_display (GTK_WIDGET (icon)),
 275                                               icon->manager_window);
 276
 277       gdk_window_remove_filter (gdkwin, egg_tray_icon_manager_filter, icon);
 278     }
 279
 280   XGrabServer (xdisplay);
 281
 282   icon->manager_window = XGetSelectionOwner (xdisplay,
 283                                              icon->selection_atom);
 284
 285   if (icon->manager_window != None)
 286     XSelectInput (xdisplay,
 287                   icon->manager_window, StructureNotifyMask);
 288
 289   XUngrabServer (xdisplay);
 290   XFlush (xdisplay);
 291
 292   if (icon->manager_window != None)
 293     {
 294       GdkWindow *gdkwin;
 295
 296       gdkwin = gdk_window_lookup_for_display (gtk_widget_get_display (GTK_WIDGET (icon)),
 297                                               icon->manager_window);
 298
 299       gdk_window_add_filter (gdkwin, egg_tray_icon_manager_filter, icon);
 300
 301       /* Send a request that we'd like to dock */
 302       egg_tray_icon_send_dock_request (icon);
 303     }
 304 }
 305
 306 EggTrayIcon *
 307 egg_tray_icon_new_for_xscreen (Screen *xscreen, const char *name)
 308 {
 309   EggTrayIcon *icon;
 310   char buffer[256];
 311   GdkWindow *root_window;
 312   GdkDisplay *display;
 313   GdkScreen *screen;
 314
 315   g_return_val_if_fail (xscreen != NULL, NULL);
 316
 317   icon = g_object_new (EGG_TYPE_TRAY_ICON, NULL);
 318   gtk_window_set_title (GTK_WINDOW (icon), name);
 319
 320   display = gdk_x11_lookup_xdisplay (DisplayOfScreen (xscreen));
 321   screen = gdk_display_get_screen (display, XScreenNumberOfScreen (xscreen));
 322
 323   gtk_plug_construct_for_display (GTK_PLUG (icon),
 324                                   display, 0);
 325
 326   gtk_window_set_screen (GTK_WINDOW (icon), screen);
 327
 328   gtk_widget_realize (GTK_WIDGET (icon));
 329
 330   /* Now see if there's a manager window around */
 331   g_snprintf (buffer, sizeof (buffer),
 332               "_NET_SYSTEM_TRAY_S%d",
 333               XScreenNumberOfScreen (xscreen));
 334
 335   icon->selection_atom = XInternAtom (DisplayOfScreen (xscreen),
 336                                       buffer, False);
 337
 338   icon->manager_atom = XInternAtom (DisplayOfScreen (xscreen),
 339                                     "MANAGER", False);
 340
 341   icon->system_tray_opcode_atom = XInternAtom (DisplayOfScreen (xscreen),
 342                                                "_NET_SYSTEM_TRAY_OPCODE", False);
 343
 344   egg_tray_icon_update_manager_window (icon);
 345
 346   root_window = gdk_screen_get_root_window (gtk_widget_get_screen (GTK_WIDGET (icon)));
 347
 348   /* Add a root window filter so that we get changes on MANAGER */
 349   gdk_window_add_filter (root_window,
 350                          egg_tray_icon_manager_filter, icon);
 351
 352   return icon;
 353 }
 354
 355 EggTrayIcon *
 356 egg_tray_icon_new_for_screen (GdkScreen *screen, const char *name)
 357 {
 358   g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
 359
 360   return egg_tray_icon_new_for_xscreen (GDK_SCREEN_XSCREEN (screen), name);
 361 }
 362
 363 EggTrayIcon*
 364 egg_tray_icon_new (const gchar *name)
 365 {
 366   return egg_tray_icon_new_for_xscreen (DefaultScreenOfDisplay (gdk_display), name);
 367 }
 368
 369 guint
 370 egg_tray_icon_send_message (EggTrayIcon *icon,
 371                             gint         timeout,
 372                             const gchar *message,
 373                             gint         len)
 374 {
 375   guint stamp;
 376
 377   g_return_val_if_fail (EGG_IS_TRAY_ICON (icon), 0);
 378   g_return_val_if_fail (timeout >= 0, 0);
 379   g_return_val_if_fail (message != NULL, 0);
 380
 381   if (icon->manager_window == None)
 382     return 0;
 383
 384   if (len < 0)
 385     len = strlen (message);
 386
 387   stamp = icon->stamp++;
 388
 389   /* Get ready to send the message */
 390   egg_tray_icon_send_manager_message (icon, SYSTEM_TRAY_BEGIN_MESSAGE,
 391                                       (Window)gtk_plug_get_id (GTK_PLUG (icon)),
 392                                       timeout, len, stamp);
 393
 394   /* Now to send the actual message */
 395   gdk_error_trap_push ();
 396   while (len > 0)
 397     {
 398       XClientMessageEvent ev;
 399       Display *xdisplay;
 400
 401       xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
 402
 403       ev.type = ClientMessage;
 404       ev.window = (Window)gtk_plug_get_id (GTK_PLUG (icon));
 405       ev.format = 8;
 406       ev.message_type = XInternAtom (xdisplay,
 407                                      "_NET_SYSTEM_TRAY_MESSAGE_DATA", False);
 408       if (len > 20)
 409         {
 410           memcpy (&ev.data, message, 20);
 411           len -= 20;
 412           message += 20;
 413         }
 414       else
 415         {
 416           memcpy (&ev.data, message, len);
 417           len = 0;
 418         }
 419
 420       XSendEvent (xdisplay,
 421                   icon->manager_window, False, StructureNotifyMask, (XEvent *)&ev);
 422       XSync (xdisplay, False);
 423     }
 424   gdk_error_trap_pop ();
 425
 426   return stamp;
 427 }
 428
 429 void
 430 egg_tray_icon_cancel_message (EggTrayIcon *icon,
 431                               guint        id)
 432 {
 433   g_return_if_fail (EGG_IS_TRAY_ICON (icon));
 434   g_return_if_fail (id > 0);
 435
 436   egg_tray_icon_send_manager_message (icon, SYSTEM_TRAY_CANCEL_MESSAGE,
 437                                       (Window)gtk_plug_get_id (GTK_PLUG (icon)),
 438                                       id, 0, 0);
 439 }
 440
 441 #endif /* __WXGTK20__ */
 442 #endif /* GTK_CHECK_VERSION(2, 1, 0) */