Pileus Git - ~andy/gtk/blob - gtk/gtktrayicon-x11.c

   1 /* gtktrayicon.c
   2  * Copyright (C) 2002 Anders Carlsson <andersca@gnu.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * This is an implementation of the freedesktop.org "system tray" spec,
  22  * http://www.freedesktop.org/wiki/Standards/systemtray-spec
  23  */
  24
  25 #include "config.h"
  26
  27 #include <math.h>
  28 #include <string.h>
  29
  30 #include "x11/gdkx.h"
  31 #include <X11/Xatom.h>
  32 #include <cairo-xlib.h>
  33
  34 #include "gtkintl.h"
  35 #include "gtkprivate.h"
  36 #include "gtktrayicon.h"
  37 #include "gtktestutils.h"
  38 #include "gtkdebug.h"
  39 #include "gtktypebuiltins.h"
  40
  41 #define SYSTEM_TRAY_REQUEST_DOCK    0
  42 #define SYSTEM_TRAY_BEGIN_MESSAGE   1
  43 #define SYSTEM_TRAY_CANCEL_MESSAGE  2
  44
  45 #define SYSTEM_TRAY_ORIENTATION_HORZ 0
  46 #define SYSTEM_TRAY_ORIENTATION_VERT 1
  47
  48 enum {
  49   PROP_0,
  50   PROP_ORIENTATION,
  51   PROP_FG_COLOR,
  52   PROP_ERROR_COLOR,
  53   PROP_WARNING_COLOR,
  54   PROP_SUCCESS_COLOR,
  55   PROP_PADDING,
  56   PROP_ICON_SIZE
  57 };
  58
  59 struct _GtkTrayIconPrivate
  60 {
  61   guint stamp;
  62
  63   Atom selection_atom;
  64   Atom manager_atom;
  65   Atom system_tray_opcode_atom;
  66   Atom orientation_atom;
  67   Atom visual_atom;
  68   Atom colors_atom;
  69   Atom padding_atom;
  70   Atom icon_size_atom;
  71   Window manager_window;
  72   GdkVisual *manager_visual;
  73   gboolean manager_visual_rgba;
  74
  75   GtkOrientation orientation;
  76   GdkColor fg_color;
  77   GdkColor error_color;
  78   GdkColor warning_color;
  79   GdkColor success_color;
  80   gint padding;
  81   gint icon_size;
  82 };
  83
  84 static void gtk_tray_icon_constructed   (GObject     *object);
  85 static void gtk_tray_icon_dispose       (GObject     *object);
  86
  87 static void gtk_tray_icon_get_property  (GObject     *object,
  88                                          guint        prop_id,
  89                                          GValue      *value,
  90                                          GParamSpec  *pspec);
  91
  92 static void     gtk_tray_icon_realize   (GtkWidget   *widget);
  93 static void     gtk_tray_icon_style_updated (GtkWidget   *widget);
  94 static gboolean gtk_tray_icon_delete    (GtkWidget   *widget,
  95                                          GdkEventAny *event);
  96 static gboolean gtk_tray_icon_draw      (GtkWidget   *widget,
  97                                          cairo_t     *cr);
  98
  99 static void gtk_tray_icon_clear_manager_window     (GtkTrayIcon *icon);
 100 static void gtk_tray_icon_update_manager_window    (GtkTrayIcon *icon);
 101 static void gtk_tray_icon_manager_window_destroyed (GtkTrayIcon *icon);
 102
 103 static GdkFilterReturn gtk_tray_icon_manager_filter (GdkXEvent *xevent,
 104                                                      GdkEvent  *event,
 105                                                      gpointer   user_data);
 106
 107
 108 G_DEFINE_TYPE (GtkTrayIcon, gtk_tray_icon, GTK_TYPE_PLUG)
 109
 110 static void
 111 gtk_tray_icon_class_init (GtkTrayIconClass *class)
 112 {
 113   GObjectClass *gobject_class = (GObjectClass *)class;
 114   GtkWidgetClass *widget_class = (GtkWidgetClass *)class;
 115
 116   gobject_class->get_property = gtk_tray_icon_get_property;
 117   gobject_class->constructed = gtk_tray_icon_constructed;
 118   gobject_class->dispose = gtk_tray_icon_dispose;
 119
 120   widget_class->realize = gtk_tray_icon_realize;
 121   widget_class->style_updated = gtk_tray_icon_style_updated;
 122   widget_class->delete_event = gtk_tray_icon_delete;
 123   widget_class->draw = gtk_tray_icon_draw;
 124
 125   g_object_class_install_property (gobject_class,
 126                                    PROP_ORIENTATION,
 127                                    g_param_spec_enum ("orientation",
 128                                                       P_("Orientation"),
 129                                                       P_("The orientation of the tray"),
 130                                                       GTK_TYPE_ORIENTATION,
 131                                                       GTK_ORIENTATION_HORIZONTAL,
 132                                                       GTK_PARAM_READABLE));
 133
 134   g_object_class_install_property (gobject_class,
 135                                    PROP_FG_COLOR,
 136                                    g_param_spec_boxed ("fg-color",
 137                                                        P_("Foreground color"),
 138                                                        P_("Foreground color for symbolic icons"),
 139                                                        GDK_TYPE_COLOR,
 140                                                        GTK_PARAM_READABLE));
 141
 142   g_object_class_install_property (gobject_class,
 143                                    PROP_ERROR_COLOR,
 144                                    g_param_spec_boxed ("error-color",
 145                                                        P_("Error color"),
 146                                                        P_("Error color for symbolic icons"),
 147                                                        GDK_TYPE_COLOR,
 148                                                        GTK_PARAM_READABLE));
 149
 150   g_object_class_install_property (gobject_class,
 151                                    PROP_WARNING_COLOR,
 152                                    g_param_spec_boxed ("warning-color",
 153                                                        P_("Warning color"),
 154                                                        P_("Warning color for symbolic icons"),
 155                                                        GDK_TYPE_COLOR,
 156                                                        GTK_PARAM_READABLE));
 157
 158   g_object_class_install_property (gobject_class,
 159                                    PROP_SUCCESS_COLOR,
 160                                    g_param_spec_boxed ("success-color",
 161                                                        P_("Success color"),
 162                                                        P_("Success color for symbolic icons"),
 163                                                        GDK_TYPE_COLOR,
 164                                                        GTK_PARAM_READABLE));
 165
 166   g_object_class_install_property (gobject_class,
 167                                    PROP_PADDING,
 168                                    g_param_spec_int ("padding",
 169                                                      P_("Padding"),
 170                                                      P_("Padding that should be put around icons in the tray"),
 171                                                      0,
 172                                                      G_MAXINT,
 173                                                      0,
 174                                                      GTK_PARAM_READABLE));
 175
 176   g_object_class_install_property (gobject_class,
 177                                    PROP_ICON_SIZE,
 178                                    g_param_spec_int ("icon-size",
 179                                                      P_("Icon Size"),
 180                                                      P_("The pixel size that icons should be forced to, or zero"),
 181                                                      0,
 182                                                      G_MAXINT,
 183                                                      0,
 184                                                      GTK_PARAM_READABLE));
 185
 186   g_type_class_add_private (class, sizeof (GtkTrayIconPrivate));
 187 }
 188
 189 static void
 190 gtk_tray_icon_init (GtkTrayIcon *icon)
 191 {
 192   icon->priv = G_TYPE_INSTANCE_GET_PRIVATE (icon, GTK_TYPE_TRAY_ICON,
 193                                             GtkTrayIconPrivate);
 194
 195   icon->priv->stamp = 1;
 196   icon->priv->orientation = GTK_ORIENTATION_HORIZONTAL;
 197   icon->priv->fg_color.red        = 0x0000;
 198   icon->priv->fg_color.green      = 0x0000;
 199   icon->priv->fg_color.blue       = 0x0000;
 200   icon->priv->error_color.red     = 0xcc00;
 201   icon->priv->error_color.green   = 0x0000;
 202   icon->priv->error_color.blue    = 0x0000;
 203   icon->priv->warning_color.red   = 0xf500;
 204   icon->priv->warning_color.green = 0x7900;
 205   icon->priv->warning_color.blue  = 0x3e00;
 206   icon->priv->success_color.red   = 0x4e00;
 207   icon->priv->success_color.green = 0x9a00;
 208   icon->priv->success_color.blue  = 0x0600;
 209   icon->priv->padding = 0;
 210   icon->priv->icon_size = 0;
 211
 212   gtk_widget_set_app_paintable (GTK_WIDGET (icon), TRUE);
 213   gtk_widget_add_events (GTK_WIDGET (icon), GDK_PROPERTY_CHANGE_MASK);
 214 }
 215
 216 static void
 217 gtk_tray_icon_constructed (GObject *object)
 218 {
 219   /* Do setup that depends on the screen; screen has been set at this point */
 220
 221   GtkTrayIcon *icon = GTK_TRAY_ICON (object);
 222   GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (object));
 223   GdkWindow *root_window = gdk_screen_get_root_window (screen);
 224   GdkDisplay *display = gtk_widget_get_display (GTK_WIDGET (object));
 225   Display *xdisplay = gdk_x11_display_get_xdisplay (display);
 226   char buffer[256];
 227
 228   g_snprintf (buffer, sizeof (buffer),
 229               "_NET_SYSTEM_TRAY_S%d",
 230               gdk_screen_get_number (screen));
 231
 232   icon->priv->selection_atom = XInternAtom (xdisplay, buffer, False);
 233
 234   icon->priv->manager_atom = XInternAtom (xdisplay, "MANAGER", False);
 235
 236   icon->priv->system_tray_opcode_atom = XInternAtom (xdisplay,
 237                                                      "_NET_SYSTEM_TRAY_OPCODE",
 238                                                      False);
 239
 240   icon->priv->orientation_atom = XInternAtom (xdisplay,
 241                                               "_NET_SYSTEM_TRAY_ORIENTATION",
 242                                               False);
 243
 244   icon->priv->visual_atom = XInternAtom (xdisplay,
 245                                          "_NET_SYSTEM_TRAY_VISUAL",
 246                                          False);
 247
 248   icon->priv->colors_atom = XInternAtom (xdisplay,
 249                                          "_NET_SYSTEM_TRAY_COLORS",
 250                                          False);
 251
 252   icon->priv->padding_atom = XInternAtom (xdisplay,
 253                                          "_NET_SYSTEM_TRAY_PADDING",
 254                                          False);
 255
 256   icon->priv->icon_size_atom = XInternAtom (xdisplay,
 257                                             "_NET_SYSTEM_TRAY_ICON_SIZE",
 258                                             False);
 259
 260   /* Add a root window filter so that we get changes on MANAGER */
 261   gdk_window_add_filter (root_window,
 262                          gtk_tray_icon_manager_filter, icon);
 263
 264   gtk_tray_icon_update_manager_window (icon);
 265 }
 266
 267 static void
 268 gtk_tray_icon_clear_manager_window (GtkTrayIcon *icon)
 269 {
 270   GdkDisplay *display = gtk_widget_get_display (GTK_WIDGET (icon));
 271
 272   if (icon->priv->manager_window != None)
 273     {
 274       GdkWindow *gdkwin;
 275
 276       gdkwin = gdk_x11_window_lookup_for_display (display,
 277                                                   icon->priv->manager_window);
 278
 279       gdk_window_remove_filter (gdkwin, gtk_tray_icon_manager_filter, icon);
 280
 281       icon->priv->manager_window = None;
 282       icon->priv->manager_visual = NULL;
 283     }
 284 }
 285
 286 static void
 287 gtk_tray_icon_dispose (GObject *object)
 288 {
 289   GtkTrayIcon *icon = GTK_TRAY_ICON (object);
 290   GtkWidget *widget = GTK_WIDGET (object);
 291   GdkWindow *root_window = gdk_screen_get_root_window (gtk_widget_get_screen (widget));
 292
 293   gtk_tray_icon_clear_manager_window (icon);
 294
 295   gdk_window_remove_filter (root_window, gtk_tray_icon_manager_filter, icon);
 296
 297   G_OBJECT_CLASS (gtk_tray_icon_parent_class)->dispose (object);
 298 }
 299
 300 static void
 301 gtk_tray_icon_get_property (GObject    *object,
 302                             guint       prop_id,
 303                             GValue     *value,
 304                             GParamSpec *pspec)
 305 {
 306   GtkTrayIcon *icon = GTK_TRAY_ICON (object);
 307
 308   switch (prop_id)
 309     {
 310     case PROP_ORIENTATION:
 311       g_value_set_enum (value, icon->priv->orientation);
 312       break;
 313     case PROP_FG_COLOR:
 314       g_value_set_boxed (value, &icon->priv->fg_color);
 315       break;
 316     case PROP_ERROR_COLOR:
 317       g_value_set_boxed (value, &icon->priv->error_color);
 318       break;
 319     case PROP_WARNING_COLOR:
 320       g_value_set_boxed (value, &icon->priv->warning_color);
 321       break;
 322     case PROP_SUCCESS_COLOR:
 323       g_value_set_boxed (value, &icon->priv->success_color);
 324       break;
 325     case PROP_PADDING:
 326       g_value_set_int (value, icon->priv->padding);
 327       break;
 328     case PROP_ICON_SIZE:
 329       g_value_set_int (value, icon->priv->icon_size);
 330       break;
 331     default:
 332       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 333       break;
 334     }
 335 }
 336
 337 static gboolean
 338 gtk_tray_icon_draw (GtkWidget *widget,
 339                     cairo_t   *cr)
 340 {
 341   GtkTrayIcon *icon = GTK_TRAY_ICON (widget);
 342   GtkWidget *focus_child;
 343   GdkWindow *window;
 344   gint border_width;
 345   gboolean retval = FALSE;
 346   cairo_surface_t *target;
 347
 348   window = gtk_widget_get_window (widget);
 349   target = cairo_get_group_target (cr);
 350
 351   if (icon->priv->manager_visual_rgba ||
 352       cairo_surface_get_type (target) != CAIRO_SURFACE_TYPE_XLIB ||
 353       cairo_xlib_surface_get_drawable (target) != GDK_WINDOW_XID (window))
 354     {
 355       /* Clear to transparent */
 356       cairo_set_source_rgba (cr, 0, 0, 0, 0);
 357       cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
 358       cairo_paint (cr);
 359     }
 360   else
 361     {
 362       GdkRectangle clip;
 363
 364       if (gdk_cairo_get_clip_rectangle (cr, &clip))
 365         {
 366           /* Clear to parent-relative pixmap
 367            * We need to use direct X access here because GDK doesn't know about
 368            * the parent realtive pixmap. */
 369           cairo_surface_flush (target);
 370
 371           XClearArea (GDK_WINDOW_XDISPLAY (window),
 372                       GDK_WINDOW_XID (window),
 373                       clip.x, clip.y,
 374                       clip.width, clip.height,
 375                       False);
 376           cairo_surface_mark_dirty_rectangle (target,
 377                                               clip.x, clip.y,
 378                                               clip.width, clip.height);
 379         }
 380     }
 381
 382   if (GTK_WIDGET_CLASS (gtk_tray_icon_parent_class)->draw)
 383     retval = GTK_WIDGET_CLASS (gtk_tray_icon_parent_class)->draw (widget, cr);
 384
 385   focus_child = gtk_container_get_focus_child (GTK_CONTAINER (widget));
 386   if (focus_child && gtk_widget_has_focus (focus_child))
 387     {
 388       GtkStyleContext *context;
 389       GtkStateFlags state;
 390
 391       border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 392       context = gtk_widget_get_style_context (widget);
 393       state = gtk_widget_get_state_flags (widget);
 394
 395       gtk_style_context_save (context);
 396       gtk_style_context_set_state (context, state);
 397
 398       gtk_render_focus (context, cr, border_width, border_width,
 399                         gtk_widget_get_allocated_width (widget) - 2 * border_width,
 400                         gtk_widget_get_allocated_height (widget) - 2 * border_width);
 401
 402       gtk_style_context_restore (context);
 403     }
 404
 405   return retval;
 406 }
 407
 408 static void
 409 gtk_tray_icon_get_orientation_property (GtkTrayIcon *icon)
 410 {
 411   GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (icon));
 412   GdkDisplay *display = gdk_screen_get_display (screen);
 413   Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
 414
 415   Atom type;
 416   int format;
 417   union {
 418         gulong *prop;
 419         guchar *prop_ch;
 420   } prop = { NULL };
 421   gulong nitems;
 422   gulong bytes_after;
 423   int error, result;
 424
 425   g_assert (icon->priv->manager_window != None);
 426
 427   gdk_error_trap_push ();
 428   type = None;
 429   result = XGetWindowProperty (xdisplay,
 430                                icon->priv->manager_window,
 431                                icon->priv->orientation_atom,
 432                                0, G_MAXLONG, FALSE,
 433                                XA_CARDINAL,
 434                                &type, &format, &nitems,
 435                                &bytes_after, &(prop.prop_ch));
 436   error = gdk_error_trap_pop ();
 437
 438   if (error || result != Success)
 439     return;
 440
 441   if (type == XA_CARDINAL && nitems == 1 && format == 32)
 442     {
 443       GtkOrientation orientation;
 444
 445       orientation = (prop.prop [0] == SYSTEM_TRAY_ORIENTATION_HORZ) ?
 446                                         GTK_ORIENTATION_HORIZONTAL :
 447                                         GTK_ORIENTATION_VERTICAL;
 448
 449       if (icon->priv->orientation != orientation)
 450         {
 451           icon->priv->orientation = orientation;
 452
 453           g_object_notify (G_OBJECT (icon), "orientation");
 454         }
 455     }
 456
 457   if (type != None)
 458     XFree (prop.prop);
 459 }
 460
 461 static void
 462 gtk_tray_icon_get_visual_property (GtkTrayIcon *icon)
 463 {
 464   GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (icon));
 465   GdkDisplay *display = gdk_screen_get_display (screen);
 466   Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
 467
 468   Atom type;
 469   int format;
 470   union {
 471         gulong *prop;
 472         guchar *prop_ch;
 473   } prop = { NULL };
 474   gulong nitems;
 475   gulong bytes_after;
 476   int error, result;
 477   GdkVisual *visual;
 478   gint red_prec;
 479   gint green_prec;
 480   gint blue_prec;
 481
 482   g_assert (icon->priv->manager_window != None);
 483
 484   gdk_error_trap_push ();
 485   type = None;
 486   result = XGetWindowProperty (xdisplay,
 487                                icon->priv->manager_window,
 488                                icon->priv->visual_atom,
 489                                0, G_MAXLONG, FALSE,
 490                                XA_VISUALID,
 491                                &type, &format, &nitems,
 492                                &bytes_after, &(prop.prop_ch));
 493   error = gdk_error_trap_pop ();
 494
 495   visual = NULL;
 496
 497   if (!error && result == Success &&
 498       type == XA_VISUALID && nitems == 1 && format == 32)
 499     {
 500       VisualID visual_id = prop.prop[0];
 501       visual = gdk_x11_screen_lookup_visual (screen, visual_id);
 502     }
 503
 504   gdk_visual_get_red_pixel_details (visual, NULL, NULL, &red_prec);
 505   gdk_visual_get_green_pixel_details (visual, NULL, NULL, &green_prec);
 506   gdk_visual_get_blue_pixel_details (visual, NULL, NULL, &blue_prec);
 507
 508   icon->priv->manager_visual = visual;
 509   icon->priv->manager_visual_rgba = visual != NULL &&
 510     (red_prec + blue_prec + green_prec < gdk_visual_get_depth (visual));
 511
 512   /* For the background-relative hack we use when we aren't using a real RGBA
 513    * visual, we can't be double-buffered */
 514   gtk_widget_set_double_buffered (GTK_WIDGET (icon), icon->priv->manager_visual_rgba);
 515
 516   if (type != None)
 517     XFree (prop.prop);
 518 }
 519
 520 static void
 521 gtk_tray_icon_get_colors_property (GtkTrayIcon *icon)
 522 {
 523   GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (icon));
 524   GdkDisplay *display = gdk_screen_get_display (screen);
 525   Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
 526
 527   Atom type;
 528   int format;
 529   union {
 530         gulong *prop;
 531         guchar *prop_ch;
 532   } prop = { NULL };
 533   gulong nitems;
 534   gulong bytes_after;
 535   int error, result;
 536
 537   g_assert (icon->priv->manager_window != None);
 538
 539   gdk_error_trap_push ();
 540   type = None;
 541   result = XGetWindowProperty (xdisplay,
 542                                icon->priv->manager_window,
 543                                icon->priv->colors_atom,
 544                                0, G_MAXLONG, FALSE,
 545                                XA_CARDINAL,
 546                                &type, &format, &nitems,
 547                                &bytes_after, &(prop.prop_ch));
 548   error = gdk_error_trap_pop ();
 549
 550   if (error || result != Success)
 551     return;
 552
 553   if (type == XA_CARDINAL && nitems == 12 && format == 32)
 554     {
 555       GdkColor color;
 556
 557       g_object_freeze_notify (G_OBJECT (icon));
 558
 559       color.red = prop.prop[0];
 560       color.green = prop.prop[1];
 561       color.blue = prop.prop[2];
 562
 563       if (!gdk_color_equal (&icon->priv->fg_color, &color))
 564         {
 565           icon->priv->fg_color = color;
 566
 567           g_object_notify (G_OBJECT (icon), "fg-color");
 568         }
 569
 570       color.red = prop.prop[3];
 571       color.green = prop.prop[4];
 572       color.blue = prop.prop[5];
 573
 574       if (!gdk_color_equal (&icon->priv->error_color, &color))
 575         {
 576           icon->priv->error_color = color;
 577
 578           g_object_notify (G_OBJECT (icon), "error-color");
 579         }
 580
 581       color.red = prop.prop[6];
 582       color.green = prop.prop[7];
 583       color.blue = prop.prop[8];
 584
 585       if (!gdk_color_equal (&icon->priv->warning_color, &color))
 586         {
 587           icon->priv->warning_color = color;
 588
 589           g_object_notify (G_OBJECT (icon), "warning-color");
 590         }
 591
 592       color.red = prop.prop[9];
 593       color.green = prop.prop[10];
 594       color.blue = prop.prop[11];
 595
 596       if (!gdk_color_equal (&icon->priv->success_color, &color))
 597         {
 598           icon->priv->success_color = color;
 599
 600           g_object_notify (G_OBJECT (icon), "success-color");
 601         }
 602
 603       g_object_thaw_notify (G_OBJECT (icon));
 604     }
 605
 606   if (type != None)
 607     XFree (prop.prop);
 608 }
 609
 610 static void
 611 gtk_tray_icon_get_padding_property (GtkTrayIcon *icon)
 612 {
 613   GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (icon));
 614   GdkDisplay *display = gdk_screen_get_display (screen);
 615   Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
 616
 617   Atom type;
 618   int format;
 619   union {
 620         gulong *prop;
 621         guchar *prop_ch;
 622   } prop = { NULL };
 623   gulong nitems;
 624   gulong bytes_after;
 625   int error, result;
 626
 627   g_assert (icon->priv->manager_window != None);
 628
 629   gdk_error_trap_push ();
 630   type = None;
 631   result = XGetWindowProperty (xdisplay,
 632                                icon->priv->manager_window,
 633                                icon->priv->padding_atom,
 634                                0, G_MAXLONG, FALSE,
 635                                XA_CARDINAL,
 636                                &type, &format, &nitems,
 637                                &bytes_after, &(prop.prop_ch));
 638   error = gdk_error_trap_pop ();
 639
 640   if (!error && result == Success &&
 641       type == XA_CARDINAL && nitems == 1 && format == 32)
 642     {
 643       gint padding;
 644
 645       padding = prop.prop[0];
 646
 647       if (icon->priv->padding != padding)
 648         {
 649           icon->priv->padding = padding;
 650
 651           g_object_notify (G_OBJECT (icon), "padding");
 652         }
 653     }
 654
 655   if (type != None)
 656     XFree (prop.prop);
 657 }
 658
 659 static void
 660 gtk_tray_icon_get_icon_size_property (GtkTrayIcon *icon)
 661 {
 662   GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (icon));
 663   GdkDisplay *display = gdk_screen_get_display (screen);
 664   Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
 665
 666   Atom type;
 667   int format;
 668   union {
 669         gulong *prop;
 670         guchar *prop_ch;
 671   } prop = { NULL };
 672   gulong nitems;
 673   gulong bytes_after;
 674   int error, result;
 675
 676   g_assert (icon->priv->manager_window != None);
 677
 678   gdk_error_trap_push ();
 679   type = None;
 680   result = XGetWindowProperty (xdisplay,
 681                                icon->priv->manager_window,
 682                                icon->priv->icon_size_atom,
 683                                0, G_MAXLONG, FALSE,
 684                                XA_CARDINAL,
 685                                &type, &format, &nitems,
 686                                &bytes_after, &(prop.prop_ch));
 687   error = gdk_error_trap_pop ();
 688
 689   if (!error && result == Success &&
 690       type == XA_CARDINAL && nitems == 1 && format == 32)
 691     {
 692       gint icon_size;
 693
 694       icon_size = prop.prop[0];
 695
 696       if (icon->priv->icon_size != icon_size)
 697         {
 698           icon->priv->icon_size = icon_size;
 699
 700           g_object_notify (G_OBJECT (icon), "icon-size");
 701         }
 702     }
 703
 704   if (type != None)
 705     XFree (prop.prop);
 706 }
 707
 708 static GdkFilterReturn
 709 gtk_tray_icon_manager_filter (GdkXEvent *xevent,
 710                               GdkEvent  *event,
 711                               gpointer   user_data)
 712 {
 713   GtkTrayIcon *icon = user_data;
 714   XEvent *xev = (XEvent *)xevent;
 715
 716   if (xev->xany.type == ClientMessage &&
 717       xev->xclient.message_type == icon->priv->manager_atom &&
 718       xev->xclient.data.l[1] == icon->priv->selection_atom)
 719     {
 720       GTK_NOTE (PLUGSOCKET,
 721                 g_print ("GtkStatusIcon %p: tray manager appeared\n", icon));
 722
 723       gtk_tray_icon_update_manager_window (icon);
 724     }
 725   else if (xev->xany.window == icon->priv->manager_window)
 726     {
 727       if (xev->xany.type == PropertyNotify &&
 728           xev->xproperty.atom == icon->priv->orientation_atom)
 729         {
 730           GTK_NOTE (PLUGSOCKET,
 731                     g_print ("GtkStatusIcon %p: got PropertyNotify on manager window for orientation atom\n", icon));
 732
 733           gtk_tray_icon_get_orientation_property (icon);
 734         }
 735       else if (xev->xany.type == PropertyNotify &&
 736                xev->xproperty.atom == icon->priv->colors_atom)
 737         {
 738           GTK_NOTE (PLUGSOCKET,
 739                     g_print ("GtkStatusIcon %p: got PropertyNotify on manager window for colors atom\n", icon));
 740
 741           gtk_tray_icon_get_colors_property (icon);
 742         }
 743       else if (xev->xany.type == PropertyNotify &&
 744                xev->xproperty.atom == icon->priv->padding_atom)
 745         {
 746           gtk_tray_icon_get_padding_property (icon);
 747         }
 748       else if (xev->xany.type == PropertyNotify &&
 749                xev->xproperty.atom == icon->priv->icon_size_atom)
 750         {
 751           gtk_tray_icon_get_icon_size_property (icon);
 752         }
 753       else if (xev->xany.type == DestroyNotify)
 754         {
 755           GTK_NOTE (PLUGSOCKET,
 756                     g_print ("GtkStatusIcon %p: got DestroyNotify for manager window\n", icon));
 757
 758           gtk_tray_icon_manager_window_destroyed (icon);
 759         }
 760       else
 761         GTK_NOTE (PLUGSOCKET,
 762                   g_print ("GtkStatusIcon %p: got other message on manager window\n", icon));
 763     }
 764
 765   return GDK_FILTER_CONTINUE;
 766 }
 767
 768 static void
 769 gtk_tray_icon_send_manager_message (GtkTrayIcon *icon,
 770                                     long         message,
 771                                     Window       window,
 772                                     long         data1,
 773                                     long         data2,
 774                                     long         data3)
 775 {
 776   GtkWidget *widget;
 777   XClientMessageEvent ev;
 778   Display *display;
 779
 780   widget = GTK_WIDGET (icon);
 781
 782   memset (&ev, 0, sizeof (ev));
 783   ev.type = ClientMessage;
 784   ev.window = window;
 785   ev.message_type = icon->priv->system_tray_opcode_atom;
 786   ev.format = 32;
 787   ev.data.l[0] = gdk_x11_get_server_time (gtk_widget_get_window (widget));
 788   ev.data.l[1] = message;
 789   ev.data.l[2] = data1;
 790   ev.data.l[3] = data2;
 791   ev.data.l[4] = data3;
 792
 793   display = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (widget));
 794
 795   gdk_error_trap_push ();
 796   XSendEvent (display,
 797               icon->priv->manager_window, False, NoEventMask, (XEvent *)&ev);
 798   gdk_error_trap_pop_ignored ();
 799 }
 800
 801 static void
 802 gtk_tray_icon_send_dock_request (GtkTrayIcon *icon)
 803 {
 804   GTK_NOTE (PLUGSOCKET,
 805             g_print ("GtkStatusIcon %p: sending dock request to manager window %lx\n",
 806                      icon, (gulong) icon->priv->manager_window));
 807
 808   gtk_tray_icon_send_manager_message (icon,
 809                                       SYSTEM_TRAY_REQUEST_DOCK,
 810                                       icon->priv->manager_window,
 811                                       gtk_plug_get_id (GTK_PLUG (icon)),
 812                                       0, 0);
 813 }
 814
 815 static void
 816 gtk_tray_icon_update_manager_window (GtkTrayIcon *icon)
 817 {
 818   GtkWidget *widget = GTK_WIDGET (icon);
 819   GdkScreen *screen = gtk_widget_get_screen (widget);
 820   GdkDisplay *display = gdk_screen_get_display (screen);
 821   Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
 822
 823   GTK_NOTE (PLUGSOCKET,
 824             g_print ("GtkStatusIcon %p: updating tray icon manager window, current manager window: %lx\n",
 825                      icon, (gulong) icon->priv->manager_window));
 826
 827   if (icon->priv->manager_window != None)
 828     return;
 829
 830   GTK_NOTE (PLUGSOCKET,
 831             g_print ("GtkStatusIcon %p: trying to find manager window\n", icon));
 832
 833   XGrabServer (xdisplay);
 834
 835   icon->priv->manager_window = XGetSelectionOwner (xdisplay,
 836                                                    icon->priv->selection_atom);
 837
 838   if (icon->priv->manager_window != None)
 839     XSelectInput (xdisplay,
 840                   icon->priv->manager_window, StructureNotifyMask|PropertyChangeMask);
 841
 842   XUngrabServer (xdisplay);
 843   XFlush (xdisplay);
 844
 845   if (icon->priv->manager_window != None)
 846     {
 847       GdkWindow *gdkwin;
 848
 849       GTK_NOTE (PLUGSOCKET,
 850         g_print ("GtkStatusIcon %p: is being managed by window %lx\n",
 851                  icon, (gulong) icon->priv->manager_window));
 852
 853       gdkwin = gdk_x11_window_lookup_for_display (display,
 854                                                   icon->priv->manager_window);
 855
 856       gdk_window_add_filter (gdkwin, gtk_tray_icon_manager_filter, icon);
 857
 858       gtk_tray_icon_get_orientation_property (icon);
 859       gtk_tray_icon_get_visual_property (icon);
 860       gtk_tray_icon_get_colors_property (icon);
 861       gtk_tray_icon_get_padding_property (icon);
 862       gtk_tray_icon_get_icon_size_property (icon);
 863
 864       if (gtk_widget_get_realized (GTK_WIDGET (icon)))
 865         {
 866           if ((icon->priv->manager_visual == NULL &&
 867                gtk_widget_get_visual (widget) == gdk_screen_get_system_visual (screen)) ||
 868               (icon->priv->manager_visual == gtk_widget_get_visual (widget)))
 869             {
 870               /* Already have the right visual, can just dock
 871                */
 872               gtk_tray_icon_send_dock_request (icon);
 873             }
 874           else
 875             {
 876               /* Need to re-realize the widget to get the right visual
 877                */
 878               gtk_widget_hide (widget);
 879               gtk_widget_unrealize (widget);
 880               gtk_widget_show (widget);
 881             }
 882         }
 883     }
 884   else
 885     GTK_NOTE (PLUGSOCKET,
 886               g_print ("GtkStatusIcon %p: no tray manager found\n", icon));
 887 }
 888
 889 static void
 890 gtk_tray_icon_manager_window_destroyed (GtkTrayIcon *icon)
 891 {
 892   g_return_if_fail (icon->priv->manager_window != None);
 893
 894   GTK_NOTE (PLUGSOCKET,
 895             g_print ("GtkStatusIcon %p: tray manager window destroyed\n", icon));
 896
 897   gtk_tray_icon_clear_manager_window (icon);
 898 }
 899
 900 static gboolean
 901 gtk_tray_icon_delete (GtkWidget   *widget,
 902                       GdkEventAny *event)
 903 {
 904 #ifdef G_ENABLE_DEBUG
 905   GtkTrayIcon *icon = GTK_TRAY_ICON (widget);
 906 #endif
 907
 908   GTK_NOTE (PLUGSOCKET,
 909             g_print ("GtkStatusIcon %p: delete notify, tray manager window %lx\n",
 910                      icon, (gulong) icon->priv->manager_window));
 911
 912   /* A bug in X server versions up to x.org 1.5.0 means that:
 913    * XFixesChangeSaveSet(...., SaveSetRoot, SaveSetUnmap) doesn't work properly
 914    * and we'll left mapped in a separate toplevel window if the tray is destroyed.
 915    * For simplicity just get rid of our X window and start over.
 916    */
 917   gtk_widget_hide (widget);
 918   gtk_widget_unrealize (widget);
 919   gtk_widget_show (widget);
 920
 921   /* Handled it, don't destroy the tray icon */
 922   return TRUE;
 923 }
 924
 925 static void
 926 gtk_tray_icon_set_visual (GtkTrayIcon *icon)
 927 {
 928   GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (icon));
 929   GdkVisual *visual = icon->priv->manager_visual;
 930
 931   /* To avoid uncertainty about colormaps, _NET_SYSTEM_TRAY_VISUAL is supposed
 932    * to be either the screen default visual or a TrueColor visual; ignore it
 933    * if it is something else
 934    */
 935   if (visual && gdk_visual_get_visual_type (visual) != GDK_VISUAL_TRUE_COLOR)
 936     visual = NULL;
 937
 938   if (visual == NULL)
 939     visual = gdk_screen_get_system_visual (screen);
 940
 941   gtk_widget_set_visual (GTK_WIDGET (icon), visual);
 942 }
 943
 944 static void
 945 gtk_tray_icon_realize (GtkWidget *widget)
 946 {
 947   GtkTrayIcon *icon = GTK_TRAY_ICON (widget);
 948   GdkWindow *window;
 949
 950   /* Set our visual before realizing */
 951   gtk_tray_icon_set_visual (icon);
 952
 953   GTK_WIDGET_CLASS (gtk_tray_icon_parent_class)->realize (widget);
 954   window = gtk_widget_get_window (widget);
 955   if (icon->priv->manager_visual_rgba)
 956     {
 957       /* Set a transparent background */
 958       GdkColor transparent = { 0, 0, 0, 0 }; /* Only pixel=0 matters */
 959       gdk_window_set_background (window, &transparent);
 960     }
 961   else
 962     {
 963       /* Set a parent-relative background pixmap */
 964       gdk_window_set_background_pattern (window, NULL);
 965     }
 966
 967   GTK_NOTE (PLUGSOCKET,
 968             g_print ("GtkStatusIcon %p: realized, window: %lx, socket window: %lx\n",
 969                      widget,
 970                      (gulong) GDK_WINDOW_XID (window),
 971                      gtk_plug_get_socket_window (GTK_PLUG (icon)) ?
 972                      (gulong) GDK_WINDOW_XID (gtk_plug_get_socket_window (GTK_PLUG (icon))) : 0UL));
 973
 974   if (icon->priv->manager_window != None)
 975     gtk_tray_icon_send_dock_request (icon);
 976 }
 977
 978 static void
 979 gtk_tray_icon_style_updated (GtkWidget   *widget)
 980 {
 981   /* The default handler resets the background according to the style. We either
 982    * use a transparent background or a parent-relative background and ignore the
 983    * style background. So, just don't chain up.
 984    */
 985 }
 986
 987 guint
 988 _gtk_tray_icon_send_message (GtkTrayIcon *icon,
 989                              gint         timeout,
 990                              const gchar *message,
 991                              gint         len)
 992 {
 993   guint stamp;
 994   Display *xdisplay;
 995
 996   g_return_val_if_fail (GTK_IS_TRAY_ICON (icon), 0);
 997   g_return_val_if_fail (timeout >= 0, 0);
 998   g_return_val_if_fail (message != NULL, 0);
 999
1000   if (icon->priv->manager_window == None)
1001     return 0;
1002
1003   if (len < 0)
1004     len = strlen (message);
1005
1006   stamp = icon->priv->stamp++;
1007
1008   /* Get ready to send the message */
1009   gtk_tray_icon_send_manager_message (icon, SYSTEM_TRAY_BEGIN_MESSAGE,
1010                                       (Window)gtk_plug_get_id (GTK_PLUG (icon)),
1011                                       timeout, len, stamp);
1012
1013   /* Now to send the actual message */
1014   xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (GTK_WIDGET (icon)));
1015   gdk_error_trap_push ();
1016   while (len > 0)
1017     {
1018       XClientMessageEvent ev;
1019
1020       memset (&ev, 0, sizeof (ev));
1021       ev.type = ClientMessage;
1022       ev.window = (Window)gtk_plug_get_id (GTK_PLUG (icon));
1023       ev.format = 8;
1024       ev.message_type = XInternAtom (xdisplay,
1025                                      "_NET_SYSTEM_TRAY_MESSAGE_DATA", False);
1026       if (len > 20)
1027         {
1028           memcpy (&ev.data, message, 20);
1029           len -= 20;
1030           message += 20;
1031         }
1032       else
1033         {
1034           memcpy (&ev.data, message, len);
1035           len = 0;
1036         }
1037
1038       XSendEvent (xdisplay,
1039                   icon->priv->manager_window, False,
1040                   StructureNotifyMask, (XEvent *)&ev);
1041     }
1042   gdk_error_trap_pop_ignored ();
1043
1044   return stamp;
1045 }
1046
1047 void
1048 _gtk_tray_icon_cancel_message (GtkTrayIcon *icon,
1049                                guint        id)
1050 {
1051   g_return_if_fail (GTK_IS_TRAY_ICON (icon));
1052   g_return_if_fail (id > 0);
1053
1054   gtk_tray_icon_send_manager_message (icon, SYSTEM_TRAY_CANCEL_MESSAGE,
1055                                       (Window)gtk_plug_get_id (GTK_PLUG (icon)),
1056                                       id, 0, 0);
1057 }
1058
1059 GtkTrayIcon *
1060 _gtk_tray_icon_new_for_screen (GdkScreen  *screen,
1061                                const gchar *name)
1062 {
1063   g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
1064
1065   return g_object_new (GTK_TYPE_TRAY_ICON,
1066                        "screen", screen,
1067                        "title", name,
1068                        NULL);
1069 }
1070
1071 GtkTrayIcon*
1072 _gtk_tray_icon_new (const gchar *name)
1073 {
1074   return g_object_new (GTK_TYPE_TRAY_ICON,
1075                        "title", name,
1076                        NULL);
1077 }
1078
1079 GtkOrientation
1080 _gtk_tray_icon_get_orientation (GtkTrayIcon *icon)
1081 {
1082   g_return_val_if_fail (GTK_IS_TRAY_ICON (icon), GTK_ORIENTATION_HORIZONTAL);
1083
1084   return icon->priv->orientation;
1085 }
1086
1087 gint
1088 _gtk_tray_icon_get_padding (GtkTrayIcon *icon)
1089 {
1090   g_return_val_if_fail (GTK_IS_TRAY_ICON (icon), 0);
1091
1092   return icon->priv->padding;
1093 }
1094
1095 gint
1096 _gtk_tray_icon_get_icon_size (GtkTrayIcon *icon)
1097 {
1098   g_return_val_if_fail (GTK_IS_TRAY_ICON (icon), 0);
1099
1100   return icon->priv->icon_size;
1101 }