ROX-Filer/src/tasklist.c

   1 /*
   2  * $Id$
   3  *
   4  * ROX-Filer, filer for the ROX desktop project
   5  * Copyright (C) 2003, the ROX-Filer team.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  19  * Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 /* tasklist.c - code for tracking windows
  23  *
  24  * Loosly based on code in GNOME's libwnck.
  25  */
  26
  27 #include "config.h"
  28
  29 #include <stdlib.h>
  30
  31 #include <gtk/gtk.h>
  32 #include <gdk/gdk.h>
  33 #include <gdk/gdkx.h>
  34
  35 #include <X11/Xlib.h>
  36 #include <X11/Xatom.h>
  37
  38 #include "global.h"
  39
  40 #include "tasklist.h"
  41 #include "wrapped.h"
  42 #include "options.h"
  43 #include "gui_support.h"
  44 #include "main.h"
  45 #include "pinboard.h"
  46 #include "pixmaps.h"
  47 #include "support.h"
  48
  49 /* There is one of these for each window controlled by the window
  50  * manager (all tasks) in the _NET_CLIENT_LIST property.
  51  */
  52 typedef struct _IconWindow IconWindow;
  53
  54 struct _IconWindow {
  55         GtkWidget *widget;      /* Widget used for icon when iconified */
  56         GtkWidget *label;
  57         gchar *text;
  58         Window xwindow;
  59         gboolean iconified;
  60 };
  61
  62 /* If TRUE, only iconfied windows with _NET_WM_STATE_HIDDEN are really icons */
  63 static gboolean wm_supports_hidden = FALSE;
  64
  65 static GdkAtom xa__NET_SUPPORTED = GDK_NONE;
  66 static GdkAtom xa_WM_STATE = GDK_NONE;
  67 static GdkAtom xa_WM_NAME = GDK_NONE;
  68 static GdkAtom xa_WM_ICON_NAME = GDK_NONE;
  69 static GdkAtom xa_UTF8_STRING = GDK_NONE;
  70 static GdkAtom xa_TEXT = GDK_NONE;
  71 static GdkAtom xa__NET_WM_VISIBLE_NAME = GDK_NONE;
  72 static GdkAtom xa__NET_WM_ICON_NAME = GDK_NONE;
  73 static GdkAtom xa__NET_CLIENT_LIST = GDK_NONE;
  74 static GdkAtom xa__NET_WM_ICON_GEOMETRY = GDK_NONE;
  75 static GdkAtom xa__NET_WM_STATE = GDK_NONE;
  76 static GdkAtom xa__NET_WM_STATE_HIDDEN = GDK_NONE;
  77
  78 /* We have selected destroy and property events on every window in
  79  * this table.
  80  */
  81 static GHashTable *known = NULL;        /* XID -> IconWindow */
  82
  83 /* Static prototypes */
  84 static void remove_window(Window win);
  85 static void tasklist_update(gboolean to_empty);
  86 static GdkFilterReturn window_filter(GdkXEvent *xevent,
  87                                      GdkEvent *event,
  88                                      gpointer data);
  89 static guint xid_hash(XID *xid);
  90 static gboolean xid_equal(XID *a, XID *b);
  91 static void state_changed(IconWindow *win);
  92 static void show_icon(IconWindow *win);
  93 static void icon_win_free(IconWindow *win);
  94 static void update_style(gpointer key, gpointer data, gpointer user_data);
  95 static void update_supported(void);
  96
  97 /****************************************************************
  98  *                      EXTERNAL INTERFACE                      *
  99  ****************************************************************/
 100
 101 void tasklist_set_active(gboolean active)
 102 {
 103         static gboolean need_init = TRUE;
 104         static gboolean tasklist_active = FALSE;
 105
 106         if (active == tasklist_active)
 107                 return;
 108         tasklist_active = active;
 109
 110         if (need_init)
 111         {
 112                 GdkWindow *root;
 113
 114                 root = gdk_get_default_root_window();
 115
 116                 xa__NET_SUPPORTED = gdk_atom_intern("_NET_SUPPORTED", FALSE);
 117                 xa_WM_STATE = gdk_atom_intern("WM_STATE", FALSE);
 118                 xa_WM_ICON_NAME = gdk_atom_intern("WM_ICON_NAME", FALSE);
 119                 xa_WM_NAME = gdk_atom_intern("WM_NAME", FALSE);
 120                 xa_UTF8_STRING = gdk_atom_intern("UTF8_STRING", FALSE);
 121                 xa_TEXT = gdk_atom_intern("TEXT", FALSE);
 122                 xa__NET_CLIENT_LIST =
 123                                 gdk_atom_intern("_NET_CLIENT_LIST", FALSE);
 124                 xa__NET_WM_VISIBLE_NAME =
 125                         gdk_atom_intern("_NET_WM_VISIBLE_NAME", FALSE);
 126                 xa__NET_WM_ICON_NAME =
 127                         gdk_atom_intern("_NET_WM_ICON_NAME", FALSE);
 128                 xa__NET_WM_ICON_GEOMETRY =
 129                         gdk_atom_intern("_NET_WM_ICON_GEOMETRY", FALSE);
 130                 xa__NET_WM_STATE = gdk_atom_intern("_NET_WM_STATE", FALSE);
 131                 xa__NET_WM_STATE_HIDDEN =
 132                         gdk_atom_intern("_NET_WM_STATE_HIDDEN", FALSE);
 133
 134                 known = g_hash_table_new_full((GHashFunc) xid_hash,
 135                                               (GEqualFunc) xid_equal,
 136                                               NULL,
 137                                               (GDestroyNotify) icon_win_free);
 138                 gdk_window_set_events(root, gdk_window_get_events(root) |
 139                                         GDK_PROPERTY_CHANGE_MASK);
 140                 need_init = FALSE;
 141         }
 142
 143         if (active)
 144         {
 145                 gdk_window_add_filter(NULL, window_filter, NULL);
 146                 update_supported();
 147         }
 148         else
 149                 gdk_window_remove_filter(NULL, window_filter, NULL);
 150
 151         tasklist_update(!active);
 152 }
 153
 154 /* User has changes the colours in the options box... */
 155 void tasklist_style_changed(void)
 156 {
 157         if (known)
 158                 g_hash_table_foreach(known, update_style, NULL);
 159 }
 160
 161 /****************************************************************
 162  *                      INTERNAL FUNCTIONS                      *
 163  ****************************************************************/
 164
 165 static void icon_win_free(IconWindow *win)
 166 {
 167         g_return_if_fail(win->widget == NULL);
 168         g_return_if_fail(win->label == NULL);
 169
 170         g_free(win->text);
 171         g_free(win);
 172 }
 173
 174 /* From gdk */
 175 static guint xid_hash(XID *xid)
 176 {
 177         return *xid;
 178 }
 179
 180 /* From gdk */
 181 static gboolean xid_equal(XID *a, XID *b)
 182 {
 183         return (*a == *b);
 184 }
 185
 186 static int wincmp(const void *a, const void *b)
 187 {
 188         const Window *aw = a;
 189         const Window *bw = b;
 190
 191         if (*aw < *bw)
 192                 return -1;
 193         else if (*aw > *bw)
 194                 return 1;
 195         else
 196                 return 0;
 197 }
 198
 199 /* Read the list of WINDOWs from (xwindow,atom), returning them
 200  * in a (sorted) Array of Windows. On error, an empty array is
 201  * returned.
 202  * Free the array afterwards.
 203  */
 204 static GArray *get_window_list(Window xwindow, GdkAtom atom)
 205 {
 206         GArray *array;
 207         Atom type;
 208         int format;
 209         gulong nitems;
 210         gulong bytes_after;
 211         Window *data;
 212         int err, result;
 213         int i;
 214
 215         array = g_array_new(FALSE, FALSE, sizeof(Window));
 216
 217         gdk_error_trap_push();
 218         type = None;
 219         result = XGetWindowProperty(gdk_display,
 220                         xwindow,
 221                         gdk_x11_atom_to_xatom(atom),
 222                         0, G_MAXLONG,
 223                         False, XA_WINDOW, &type, &format, &nitems,
 224                         &bytes_after, (guchar **)&data);
 225         err = gdk_error_trap_pop();
 226
 227         if (err != Success || result != Success)
 228                 return array;
 229
 230         if (type == XA_WINDOW)
 231         {
 232                 for (i = 0; i < nitems; i++)
 233                         g_array_append_val(array, data[i]);
 234
 235                 if (array->len)
 236                         g_array_sort(array, wincmp);
 237         }
 238
 239         XFree(data);
 240
 241         return array;
 242 }
 243
 244 static gchar *get_str(IconWindow *win, GdkAtom atom)
 245 {
 246         Atom rtype;
 247         int format;
 248         gulong nitems;
 249         gulong bytes_after;
 250         char *data, *str = NULL;
 251
 252         if (XGetWindowProperty(gdk_display, win->xwindow,
 253                         gdk_x11_atom_to_xatom(atom),
 254                         0, G_MAXLONG, False,
 255                         AnyPropertyType,
 256                         &rtype, &format, &nitems,
 257                         &bytes_after, (guchar **) &data) == Success && data)
 258         {
 259                 if (*data)
 260                         str = g_strdup(data);
 261                 XFree(data);
 262         }
 263
 264         return str;
 265 }
 266
 267 static void get_icon_name(IconWindow *win)
 268 {
 269         null_g_free(&win->text);
 270
 271         win->text = get_str(win, xa__NET_WM_ICON_NAME);
 272         if (!win->text)
 273                 win->text = get_str(win, xa__NET_WM_VISIBLE_NAME);
 274         if (!win->text)
 275                 win->text = get_str(win, xa_WM_ICON_NAME);
 276         if (!win->text)
 277                 win->text = get_str(win, xa_WM_NAME);
 278         if (!win->text)
 279                 win->text = g_strdup(_("Window"));
 280 }
 281
 282 /* Call from within error_push/pop */
 283 static void window_check_status(IconWindow *win)
 284 {
 285         Atom type;
 286         int format;
 287         gulong nitems;
 288         gulong bytes_after;
 289         gint32 *data;
 290         gboolean iconic = FALSE;
 291
 292         if (wm_supports_hidden && XGetWindowProperty(gdk_display, win->xwindow,
 293                         gdk_x11_atom_to_xatom(xa__NET_WM_STATE),
 294                         0, G_MAXLONG, False,
 295                         XA_ATOM,
 296                         &type, &format, &nitems,
 297                         &bytes_after, (guchar **) &data) == Success && data)
 298         {
 299                 GdkAtom state;
 300                 int i;
 301
 302                 for (i = 0; i < nitems; i++)
 303                 {
 304                         state = gdk_x11_xatom_to_atom((Atom) data[i]);
 305                         if (state == xa__NET_WM_STATE_HIDDEN)
 306                         {
 307                                 iconic = TRUE;
 308                                 break;
 309                         }
 310                 }
 311                 XFree(data);
 312         }
 313         else if (XGetWindowProperty(gdk_display, win->xwindow,
 314                         gdk_x11_atom_to_xatom(xa_WM_STATE),
 315                         0, 1, False,
 316                         gdk_x11_atom_to_xatom(xa_WM_STATE),
 317                         &type, &format, &nitems,
 318                         &bytes_after, (guchar **) &data) == Success && data)
 319         {
 320                 iconic = data[0] == 3;
 321                 XFree(data);
 322         }
 323         else
 324                 iconic = FALSE;
 325
 326         if (win->iconified == iconic)
 327                 return;
 328
 329         win->iconified = iconic;
 330
 331         state_changed(win);
 332 }
 333
 334 /* Called for all events on all windows */
 335 static GdkFilterReturn window_filter(GdkXEvent *xevent,
 336                                      GdkEvent *event,
 337                                      gpointer data)
 338 {
 339         XEvent *xev = (XEvent *) xevent;
 340         IconWindow *w;
 341
 342         if (xev->type == PropertyNotify)
 343         {
 344                 GdkAtom atom = gdk_x11_xatom_to_atom(xev->xproperty.atom);
 345                 Window win = ((XPropertyEvent *) xev)->window;
 346
 347                 if (atom == xa_WM_STATE || atom == xa__NET_WM_STATE)
 348                 {
 349                         w = g_hash_table_lookup(known, &win);
 350
 351                         if (w)
 352                         {
 353                                 gdk_error_trap_push();
 354                                 window_check_status(w);
 355                                 if (gdk_error_trap_pop() != Success)
 356                                         g_hash_table_remove(known, &win);
 357                         }
 358                 }
 359                 else if (atom == xa__NET_CLIENT_LIST)
 360                         tasklist_update(FALSE);
 361                 else if (atom == xa__NET_SUPPORTED)
 362                         update_supported();
 363         }
 364
 365         return GDK_FILTER_CONTINUE;
 366 }
 367
 368 /* Window has been added to list of managed windows */
 369 static void add_window(Window win)
 370 {
 371         IconWindow *w;
 372
 373         /* g_print("[ New window %ld ]\n", (long) win); */
 374
 375         w = g_hash_table_lookup(known, &win);
 376
 377         if (!w)
 378         {
 379                 XWindowAttributes attr;
 380
 381                 gdk_error_trap_push();
 382
 383                 XGetWindowAttributes(gdk_display, win, &attr);
 384
 385                 if (gdk_error_trap_pop() != Success)
 386                         return;
 387                 gdk_error_trap_push();
 388
 389                 XSelectInput(gdk_display, win, attr.your_event_mask |
 390                         PropertyChangeMask);
 391
 392                 gdk_flush();
 393
 394                 if (gdk_error_trap_pop() != Success)
 395                         return;
 396
 397                 w = g_new(IconWindow, 1);
 398                 w->widget = NULL;
 399                 w->label = NULL;
 400                 w->text = NULL;
 401                 w->xwindow = win;
 402                 w->iconified = FALSE;
 403
 404                 g_hash_table_insert(known, &w->xwindow, w);
 405         }
 406
 407         gdk_error_trap_push();
 408
 409         window_check_status(w);
 410
 411 #if 0
 412         set_iconify_pos(w);
 413 #endif
 414
 415         if (gdk_error_trap_pop() != Success)
 416                 g_hash_table_remove(known, &win);
 417 }
 418
 419 /* Window is no longer managed, but hasn't been destroyed yet */
 420 static void remove_window(Window win)
 421 {
 422         IconWindow *w;
 423
 424         /* g_print("[ Remove window %ld ]\n", (long) win); */
 425
 426         w = g_hash_table_lookup(known, &win);
 427         if (w)
 428         {
 429                 if (w->iconified)
 430                 {
 431                         w->iconified = FALSE;
 432                         state_changed(w);
 433                 }
 434
 435                 g_hash_table_remove(known, &win);
 436         }
 437 }
 438
 439 /* Make sure the window list is up-to-date. Call once to start, and then
 440  * everytime _NET_CLIENT_LIST changes.
 441  * If 'to_empty' is set them pretend all windows have disappeared.
 442  */
 443 static void tasklist_update(gboolean to_empty)
 444 {
 445         static GArray *old_mapping = NULL;
 446         GArray *mapping = NULL;
 447         int new_i, old_i;
 448
 449         if (!old_mapping)
 450         {
 451                 old_mapping = g_array_new(FALSE, FALSE, sizeof(Window));
 452         }
 453
 454         if (to_empty)
 455                 mapping = g_array_new(FALSE, FALSE, sizeof(Window));
 456         else
 457                 mapping = get_window_list(gdk_x11_get_default_root_xwindow(),
 458                                 gdk_atom_intern("_NET_CLIENT_LIST", FALSE));
 459
 460         new_i = 0;
 461         old_i = 0;
 462         while (new_i < mapping->len && old_i < old_mapping->len)
 463         {
 464                 Window new = g_array_index(mapping, Window, new_i);
 465                 Window old = g_array_index(old_mapping, Window, old_i);
 466
 467                 if (new == old)
 468                 {
 469                         new_i++;
 470                         old_i++;
 471                 }
 472                 else if (new < old)
 473                 {
 474                         add_window(new);
 475                         new_i++;
 476                 }
 477                 else
 478                 {
 479                         remove_window(old);
 480                         old_i++;
 481                 }
 482         }
 483         while (new_i < mapping->len)
 484         {
 485                 add_window(g_array_index(mapping, Window, new_i));
 486                 new_i++;
 487         }
 488         while (old_i < old_mapping->len)
 489         {
 490                 remove_window(g_array_index(old_mapping, Window, old_i));
 491                 old_i++;
 492         }
 493
 494         g_array_free(old_mapping, TRUE);
 495         old_mapping = mapping;
 496 }
 497
 498 /* Called when the user clicks on the button */
 499 static void uniconify(IconWindow *win)
 500 {
 501         XClientMessageEvent sev;
 502
 503         sev.type = ClientMessage;
 504         sev.display = gdk_display;
 505         sev.format = 32;
 506         sev.window = win->xwindow;
 507         sev.message_type = gdk_x11_atom_to_xatom(
 508                         gdk_atom_intern("_NET_ACTIVE_WINDOW", FALSE));
 509         sev.data.l[0] = 0;
 510
 511         gdk_error_trap_push();
 512
 513         XSendEvent(gdk_display, DefaultRootWindow(gdk_display), False,
 514                         SubstructureNotifyMask | SubstructureRedirectMask,
 515                         (XEvent *) &sev);
 516         XSync(gdk_display, False);
 517
 518         gdk_error_trap_pop();
 519 }
 520
 521 static gint drag_start_x = -1;
 522 static gint drag_start_y = -1;
 523 static gboolean drag_started = FALSE;
 524 static gint drag_off_x = -1;
 525 static gint drag_off_y = -1;
 526
 527 static void icon_button_press(GtkWidget *widget,
 528                               GdkEventButton *event,
 529                               IconWindow *win)
 530 {
 531         if (event->button == 1)
 532         {
 533                 drag_start_x = event->x_root;
 534                 drag_start_y = event->y_root;
 535                 drag_started = FALSE;
 536
 537                 drag_off_x = event->x;
 538                 drag_off_y = event->y;
 539         }
 540 }
 541
 542 static gboolean icon_motion_notify(GtkWidget *widget,
 543                                GdkEventMotion *event,
 544                                IconWindow *win)
 545 {
 546         if (event->state & GDK_BUTTON1_MASK)
 547         {
 548                 int dx = event->x_root - drag_start_x;
 549                 int dy = event->y_root - drag_start_y;
 550
 551                 if (!drag_started)
 552                 {
 553                         if (abs(dx) < 5 && abs(dy) < 5)
 554                                 return FALSE;
 555                         drag_started = TRUE;
 556                 }
 557
 558                 fixed_move_fast(GTK_FIXED(win->widget->parent),
 559                                 win->widget,
 560                                 event->x_root - drag_off_x,
 561                                 event->y_root - drag_off_y);
 562         }
 563
 564         return FALSE;
 565 }
 566
 567 static void button_released(GtkWidget *widget, IconWindow *win)
 568 {
 569         if (!drag_started)
 570                 uniconify(win);
 571 }
 572
 573 static GdkColormap* get_cmap(GdkPixmap *pixmap)
 574 {
 575         GdkColormap *cmap;
 576
 577         cmap = gdk_drawable_get_colormap(pixmap);
 578         if (cmap)
 579                 g_object_ref(G_OBJECT(cmap));
 580
 581         if (cmap == NULL)
 582         {
 583                 if (gdk_drawable_get_depth(pixmap) == 1)
 584                 {
 585                         /* Masks don't need colourmaps */
 586                         cmap = NULL;
 587                 }
 588                 else
 589                 {
 590                         /* Try system cmap */
 591                         cmap = gdk_colormap_get_system();
 592                         g_object_ref(G_OBJECT(cmap));
 593                 }
 594         }
 595
 596         /* Be sure we aren't going to blow up due to visual mismatch */
 597         if (cmap && (gdk_colormap_get_visual(cmap)->depth !=
 598                          gdk_drawable_get_depth(pixmap)))
 599                 cmap = NULL;
 600
 601         return cmap;
 602 }
 603
 604 /* Copy a pixmap from the server to a client-side pixbuf */
 605 static GdkPixbuf* pixbuf_from_pixmap(Pixmap xpixmap)
 606 {
 607         GdkDrawable *drawable;
 608         GdkPixbuf *retval;
 609         GdkColormap *cmap;
 610         int width, height;
 611
 612         retval = NULL;
 613
 614         drawable = gdk_xid_table_lookup(xpixmap);
 615
 616         if (drawable)
 617                 g_object_ref(G_OBJECT(drawable));
 618         else
 619                 drawable = gdk_pixmap_foreign_new(xpixmap);
 620
 621         cmap = get_cmap(drawable);
 622
 623         /* GDK is supposed to do this but doesn't in GTK 2.0.2,
 624          * fixed in 2.0.3
 625          */
 626         gdk_drawable_get_size(drawable, &width, &height);
 627
 628         retval = gdk_pixbuf_get_from_drawable(NULL, drawable, cmap,
 629                                                 0, 0, 0, 0, width, height);
 630
 631         if (cmap)
 632                 g_object_unref(G_OBJECT(cmap));
 633         g_object_unref(G_OBJECT(drawable));
 634
 635         return retval;
 636 }
 637
 638 /* Creates a new masked pixbuf from a non-masked pixbuf and a mask */
 639 static GdkPixbuf* apply_mask(GdkPixbuf *pixbuf, GdkPixbuf *mask)
 640 {
 641         int w, h;
 642         int i, j;
 643         GdkPixbuf *with_alpha;
 644         guchar *src;
 645         guchar *dest;
 646         int src_stride;
 647         int dest_stride;
 648
 649         w = MIN(gdk_pixbuf_get_width(mask), gdk_pixbuf_get_width(pixbuf));
 650         h = MIN(gdk_pixbuf_get_height(mask), gdk_pixbuf_get_height(pixbuf));
 651
 652         with_alpha = gdk_pixbuf_add_alpha(pixbuf, FALSE, 0, 0, 0);
 653
 654         dest = gdk_pixbuf_get_pixels(with_alpha);
 655         src = gdk_pixbuf_get_pixels(mask);
 656
 657         dest_stride = gdk_pixbuf_get_rowstride(with_alpha);
 658         src_stride = gdk_pixbuf_get_rowstride(mask);
 659
 660         i = 0;
 661         while (i < h)
 662         {
 663                 j = 0;
 664                 while (j < w)
 665                 {
 666                         guchar *s = src + i * src_stride + j * 3;
 667                         guchar *d = dest + i * dest_stride + j * 4;
 668
 669                         /* s[0] == s[1] == s[2], they are 255 if the bit was
 670                          * set, 0 otherwise
 671                          */
 672                         if (s[0] == 0)
 673                                 d[3] = 0;   /* transparent */
 674                         else
 675                                 d[3] = 255; /* opaque */
 676
 677                         ++j;
 678                 }
 679
 680                 ++i;
 681         }
 682
 683         return with_alpha;
 684 }
 685
 686 /* Return a suitable icon for this window. unref the result.
 687  * Never returns NULL.
 688  */
 689 static GdkPixbuf *get_image_for(IconWindow *win)
 690 {
 691         static MaskedPixmap *default_icon = NULL;
 692         Pixmap pixmap = None;
 693         Pixmap mask = None;
 694         XWMHints *hints;
 695         GdkPixbuf *retval = NULL;
 696
 697         /* Try the pixmap and mask in the old WMHints... */
 698         gdk_error_trap_push();
 699         hints = XGetWMHints(gdk_display, win->xwindow);
 700
 701         if (hints)
 702         {
 703                 if (hints->flags & IconPixmapHint)
 704                         pixmap = hints->icon_pixmap;
 705                 if (hints->flags & IconMaskHint)
 706                         mask = hints->icon_mask;
 707
 708                 XFree(hints);
 709                 hints = NULL;
 710         }
 711
 712         if (pixmap != None)
 713         {
 714                 GdkPixbuf *mask_pb = NULL;
 715
 716                 retval = pixbuf_from_pixmap(pixmap);
 717
 718                 if (retval && mask != None)
 719                         mask_pb = pixbuf_from_pixmap(mask);
 720
 721                 if (mask_pb)
 722                 {
 723                         GdkPixbuf *masked;
 724
 725                         masked = apply_mask(retval, mask_pb);
 726                         g_object_unref(G_OBJECT(mask_pb));
 727
 728                         if (masked)
 729                         {
 730                                 g_object_unref(G_OBJECT(retval));
 731                                 retval = masked;
 732                         }
 733                 }
 734         }
 735
 736         gdk_flush();
 737
 738         gdk_error_trap_pop();
 739
 740         if (!retval)
 741         {
 742                 if (!default_icon)
 743                         default_icon = load_pixmap("iconified");
 744
 745                 retval = default_icon->pixbuf;
 746                 g_object_ref(retval);
 747         }
 748
 749         return retval;
 750 }
 751
 752 /* A window has been iconified -- display it on the screen */
 753 static void show_icon(IconWindow *win)
 754 {
 755         GdkPixbuf *pixbuf;
 756         GtkWidget *vbox;
 757
 758         g_return_if_fail(win->widget == NULL);
 759         g_return_if_fail(win->label == NULL);
 760
 761         win->widget = gtk_button_new();
 762         vbox = gtk_vbox_new(FALSE, 0);
 763         gtk_container_add(GTK_CONTAINER(win->widget), vbox);
 764
 765         pixbuf = get_image_for(win);
 766
 767         gtk_box_pack_start(GTK_BOX(vbox), gtk_image_new_from_pixbuf(pixbuf),
 768                            FALSE, TRUE, 0);
 769         g_object_unref(pixbuf);
 770
 771         win->label = wrapped_label_new(win->text, 180);
 772
 773         update_style(NULL, win, NULL);
 774
 775         gtk_box_pack_start(GTK_BOX(vbox), win->label, FALSE, TRUE, 0);
 776
 777         gtk_widget_add_events(win->widget, GDK_BUTTON1_MOTION_MASK);
 778         g_signal_connect(win->widget, "button-press-event",
 779                         G_CALLBACK(icon_button_press), win);
 780         g_signal_connect(win->widget, "motion-notify-event",
 781                         G_CALLBACK(icon_motion_notify), win);
 782         g_signal_connect(win->widget, "released",
 783                         G_CALLBACK(button_released), win);
 784
 785         gtk_widget_show_all(vbox);      /* So the size comes out right */
 786         pinboard_add_widget(win->widget);
 787         gtk_widget_show(win->widget);
 788 }
 789
 790 /* A window has been destroyed/expanded -- remove its icon */
 791 static void hide_icon(IconWindow *win)
 792 {
 793         g_return_if_fail(win->widget != NULL);
 794
 795         gtk_widget_destroy(win->widget);
 796         win->widget = NULL;
 797         win->label = NULL;
 798 }
 799
 800 static void state_changed(IconWindow *win)
 801 {
 802         if (win->iconified)
 803         {
 804                 get_icon_name(win);
 805                 show_icon(win);
 806         }
 807         else
 808                 hide_icon(win);
 809 }
 810
 811 #if 0
 812 /* Set the _NET_WM_ICON_GEOMETRY property, which indicates where this window
 813  * will be iconified to. Should be inside a push/pop.
 814  */
 815 static void set_iconify_pos(IconWindow *win)
 816 {
 817         gint32 data[4];
 818
 819         data[0] = iconify_next_x;
 820         data[1] = iconify_next_y;
 821         data[2] = 100;
 822         data[3] = 32;
 823
 824         XChangeProperty(gdk_display, win->xwindow,
 825                         gdk_x11_atom_to_xatom(xa__NET_WM_ICON_GEOMETRY),
 826                         XA_CARDINAL, 32, PropModeReplace, (guchar *) data, 4);
 827 }
 828 #endif
 829
 830 static void update_style(gpointer key, gpointer data, gpointer user_data)
 831 {
 832         IconWindow *win = (IconWindow *) data;
 833
 834         if (win->widget)
 835                 widget_modify_font(win->label, pinboard_font);
 836 }
 837
 838 /* Find out what the new window manager can do... */
 839 static void update_supported(void)
 840 {
 841         Atom type;
 842         int format;
 843         gulong nitems;
 844         gulong bytes_after;
 845         Atom *data;
 846         int err, result;
 847         int i;
 848         gboolean old_supports_hidden = wm_supports_hidden;
 849
 850         wm_supports_hidden = FALSE;
 851
 852         gdk_error_trap_push();
 853         type = None;
 854         result = XGetWindowProperty(gdk_display,
 855                         gdk_x11_get_default_root_xwindow(),
 856                         gdk_x11_atom_to_xatom(xa__NET_SUPPORTED),
 857                         0, G_MAXLONG,
 858                         False, XA_ATOM, &type, &format, &nitems,
 859                         &bytes_after, (guchar **)&data);
 860         err = gdk_error_trap_pop();
 861
 862         if (err != Success || result != Success)
 863                 goto out;
 864
 865         for (i = 0; i < nitems; i++)
 866         {
 867                 GdkAtom atom = gdk_x11_xatom_to_atom(data[i]);
 868
 869                 if (atom == xa__NET_WM_STATE_HIDDEN)
 870                         wm_supports_hidden = TRUE;
 871         }
 872
 873         XFree(data);
 874 out:
 875
 876         if (wm_supports_hidden != old_supports_hidden)
 877         {
 878                 tasklist_update(TRUE);
 879                 tasklist_update(FALSE);
 880         }
 881 }