Added for tray icon support. To be removed when libgnomeui sports this

2003-08-28  Hans Petter Jansson  <hpj@ximian.com>

	* eggtrayicon.[ch]: Added for tray icon support. To be removed when
	libgnomeui sports this functionality.

	* Makefile.am: Include eggtrayicon.

svn path=/trunk/; revision=22404

1 files changed, 341 insertions, 0 deletions

diff --git a/e-util/eggtrayicon.c b/e-util/eggtrayicon.c
new file mode 100644
index 0000000000..0fb53f0eda
--- /dev/null
+++ b/e-util/eggtrayicon.c
@@ -0,0 +1,341 @@
+/* -*- 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 <string.h>
+#include <gdk/gdkx.h>
+#include "eggtrayicon.h"
+
+#define SYSTEM_TRAY_REQUEST_DOCK    0
+#define SYSTEM_TRAY_BEGIN_MESSAGE   1
+#define SYSTEM_TRAY_CANCEL_MESSAGE  2
+         
+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_update_manager_window (EggTrayIcon *icon);
+
+GType
+egg_tray_icon_get_type (void)
+{
+  static GType our_type = 0;
+
+  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
+      };
+
+      our_type = g_type_register_static (GTK_TYPE_PLUG, "EggTrayIcon", &our_info, 0);
+    }
+
+  return our_type;
+}
+
+static void
+egg_tray_icon_init (EggTrayIcon *icon)
+{
+  icon->stamp = 1;
+  
+  gtk_widget_add_events (GTK_WIDGET (icon), GDK_PROPERTY_CHANGE_MASK);
+}
+
+static void
+egg_tray_icon_class_init (EggTrayIconClass *klass)
+{
+  parent_class = g_type_class_peek_parent (klass);
+}
+
+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);
+    }
+  else if (xev->xany.window == icon->manager_window)
+    {
+      if (xev->xany.type == DestroyNotify)
+	{
+	  egg_tray_icon_update_manager_window (icon);
+	}
+    }
+  
+  return GDK_FILTER_CONTINUE;
+}
+
+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;
+
+#if HAVE_GTK_MULTIHEAD
+  display = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
+#else
+  display = gdk_display;
+#endif
+  
+  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)
+{
+  Display *xdisplay;
+  
+#if HAVE_GTK_MULTIHEAD
+  xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
+#else
+  xdisplay = gdk_display;
+#endif
+  
+  if (icon->manager_window != None)
+    {
+      GdkWindow *gdkwin;
+
+#if HAVE_GTK_MULTIHEAD
+      gdkwin = gdk_window_lookup_for_display (display,
+					      icon->manager_window);
+#else
+      gdkwin = gdk_window_lookup (icon->manager_window);
+#endif
+      
+      gdk_window_remove_filter (gdkwin, egg_tray_icon_manager_filter, icon);
+    }
+  
+  XGrabServer (xdisplay);
+  
+  icon->manager_window = XGetSelectionOwner (xdisplay,
+					     icon->selection_atom);
+
+  if (icon->manager_window != None)
+    XSelectInput (xdisplay,
+		  icon->manager_window, StructureNotifyMask);
+
+  XUngrabServer (xdisplay);
+  XFlush (xdisplay);
+  
+  if (icon->manager_window != None)
+    {
+      GdkWindow *gdkwin;
+
+#if HAVE_GTK_MULTIHEAD
+      gdkwin = gdk_window_lookup_for_display (gtk_widget_get_display (GTK_WIDGET (icon)),
+					      icon->manager_window);
+#else
+      gdkwin = gdk_window_lookup (icon->manager_window);
+#endif
+      
+      gdk_window_add_filter (gdkwin, egg_tray_icon_manager_filter, icon);
+
+      /* Send a request that we'd like to dock */
+      egg_tray_icon_send_dock_request (icon);
+    }
+}
+
+static EggTrayIcon *
+egg_tray_icon_new_for_xscreen (Screen *xscreen, const char *name)
+{
+  EggTrayIcon *icon;
+  char buffer[256];
+  GdkWindow *root_window;
+
+  g_return_val_if_fail (xscreen != NULL, NULL);
+  
+  icon = g_object_new (EGG_TYPE_TRAY_ICON, NULL);
+  gtk_window_set_title (GTK_WINDOW (icon), name);
+
+#if HAVE_GTK_MULTIHEAD
+  gtk_plug_construct_for_display (GTK_PLUG (icon),
+				  gdk_screen_get_display (screen), 0);
+#else
+  gtk_plug_construct (GTK_PLUG (icon), 0);
+#endif
+  
+  gtk_widget_realize (GTK_WIDGET (icon));
+
+  /* Now see if there's a manager window around */
+  g_snprintf (buffer, sizeof (buffer),
+	      "_NET_SYSTEM_TRAY_S%d",
+	      XScreenNumberOfScreen (xscreen));
+  
+  icon->selection_atom = XInternAtom (DisplayOfScreen (xscreen),
+				      buffer, False);
+  
+  icon->manager_atom = XInternAtom (DisplayOfScreen (xscreen),
+				    "MANAGER", False);
+  
+  icon->system_tray_opcode_atom = XInternAtom (DisplayOfScreen (xscreen),
+					       "_NET_SYSTEM_TRAY_OPCODE", False);
+
+  egg_tray_icon_update_manager_window (icon);
+
+#if HAVE_GTK_MULTIHEAD
+  root_window = gdk_screen_get_root_window (screen);
+#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);
+		      
+  return icon;
+}
+
+#if HAVE_GTK_MULTIHEAD
+EggTrayIcon *
+egg_tray_icon_new_for_screen (GdkScreen *screen, const char *name)
+{
+  EggTrayIcon *icon;
+  char buffer[256];
+
+  g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
+
+  return egg_tray_icon_new_for_xscreen (GDK_SCREEN_XSCREEN (screen), name);
+}
+#endif
+
+EggTrayIcon*
+egg_tray_icon_new (const gchar *name)
+{
+  return egg_tray_icon_new_for_xscreen (DefaultScreenOfDisplay (gdk_display), name);
+}
+
+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;
+
+#if HAVE_GTK_MULTIHEAD
+      xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
+#else
+      xdisplay = gdk_display;
+#endif
+      
+      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);
+}