Dogcows Code - chaz/openbox/blob - openbox/focus_cycle.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    focus_cycle.c for the Openbox window manager
   4    Copyright (c) 2006        Mikael Magnusson
   5    Copyright (c) 2003-2007   Dana Jansens
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    See the COPYING file for a copy of the GNU General Public License.
  18 */
  19
  20 #include "focus_cycle.h"
  21 #include "focus_cycle_indicator.h"
  22 #include "focus_cycle_popup.h"
  23 #include "client.h"
  24 #include "frame.h"
  25 #include "focus.h"
  26 #include "screen.h"
  27 #include "openbox.h"
  28 #include "debug.h"
  29 #include "group.h"
  30
  31 #include <X11/Xlib.h>
  32 #include <glib.h>
  33
  34 ObClient     *focus_cycle_target = NULL;
  35
  36 static void      focus_cycle_destroy_notify (ObClient *client, gpointer data);
  37 static gboolean  focus_target_has_siblings  (ObClient *ft,
  38                                              gboolean all_desktops);
  39 static ObClient *focus_find_directional    (ObClient *c,
  40                                             ObDirection dir,
  41                                             gboolean dock_windows,
  42                                             gboolean desktop_windows);
  43 static ObClient *focus_find_directional    (ObClient *c,
  44                                             ObDirection dir,
  45                                             gboolean dock_windows,
  46                                             gboolean desktop_windows);
  47
  48 void focus_cycle_startup(gboolean reconfig)
  49 {
  50     if (reconfig) return;
  51
  52     client_add_destroy_notify(focus_cycle_destroy_notify, NULL);
  53 }
  54
  55 void focus_cycle_shutdown(gboolean reconfig)
  56 {
  57     if (reconfig) return;
  58
  59     client_remove_destroy_notify(focus_cycle_destroy_notify);
  60 }
  61
  62 void focus_cycle_stop()
  63 {
  64     if (focus_cycle_target)
  65         focus_cycle(TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE);
  66 }
  67
  68 static void focus_cycle_destroy_notify(ObClient *client, gpointer data)
  69 {
  70     /* end cycling if the target disappears. CurrentTime is fine, time won't
  71        be used
  72     */
  73     if (focus_cycle_target == client)
  74         focus_cycle(TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE);
  75 }
  76
  77 /*! Returns if a focus target has valid group siblings that can be cycled
  78   to in its place */
  79 static gboolean focus_target_has_siblings(ObClient *ft, gboolean all_desktops)
  80
  81 {
  82     GSList *it;
  83
  84     if (!ft->group) return FALSE;
  85
  86     for (it = ft->group->members; it; it = g_slist_next(it)) {
  87         ObClient *c = it->data;
  88         /* check that it's not a helper window to avoid infinite recursion */
  89         if (c != ft && !client_helper(c) &&
  90             focus_cycle_target_valid(c, all_desktops, FALSE, FALSE))
  91         {
  92             return TRUE;
  93         }
  94     }
  95     return FALSE;
  96 }
  97
  98 gboolean focus_cycle_target_valid(ObClient *ft,
  99                                   gboolean all_desktops,
 100                                   gboolean dock_windows,
 101                                   gboolean desktop_windows)
 102 {
 103     gboolean ok = FALSE;
 104
 105     /* it's on this desktop unless you want all desktops.
 106
 107        do this check first because it will usually filter out the most
 108        windows */
 109     ok = (all_desktops || ft->desktop == screen_desktop ||
 110           ft->desktop == DESKTOP_ALL);
 111
 112     /* the window can receive focus somehow */
 113     ok = ok && (ft->can_focus || ft->focus_notify);
 114
 115     /* it's the right type of window */
 116     if (dock_windows || desktop_windows)
 117         ok = ok && ((dock_windows && ft->type == OB_CLIENT_TYPE_DOCK) ||
 118                     (desktop_windows && ft->type == OB_CLIENT_TYPE_DESKTOP));
 119     else
 120         /* normal non-helper windows are valid targets */
 121         ok = ok &&
 122             ((client_normal(ft) && !client_helper(ft))
 123              ||
 124              /* helper windows are valid targets it... */
 125              (client_helper(ft) &&
 126               /* ...a window in its group already has focus ... */
 127               ((focus_client && ft->group == focus_client->group) ||
 128                /* ... or if there are no other windows in its group
 129                   that can be cycled to instead */
 130                !focus_target_has_siblings(ft, all_desktops))));
 131
 132     /* it's not set to skip the taskbar (unless it is a type that would be
 133        expected to set this hint */
 134     ok = ok && ((ft->type == OB_CLIENT_TYPE_DOCK ||
 135                  ft->type == OB_CLIENT_TYPE_DESKTOP ||
 136                  ft->type == OB_CLIENT_TYPE_TOOLBAR ||
 137                  ft->type == OB_CLIENT_TYPE_MENU ||
 138                  ft->type == OB_CLIENT_TYPE_UTILITY) ||
 139                 !ft->skip_taskbar);
 140
 141     /* it's not going to just send fous off somewhere else (modal window) */
 142     ok = ok && ft == client_focus_target(ft);
 143
 144     return ok;
 145 }
 146
 147 void focus_cycle(gboolean forward, gboolean all_desktops,
 148                  gboolean dock_windows, gboolean desktop_windows,
 149                  gboolean linear, gboolean interactive,
 150                  gboolean dialog, gboolean done, gboolean cancel)
 151 {
 152     static ObClient *first = NULL;
 153     static ObClient *t = NULL;
 154     static GList *order = NULL;
 155     GList *it, *start, *list;
 156     ObClient *ft = NULL;
 157
 158     if (interactive) {
 159         if (cancel) {
 160             focus_cycle_target = NULL;
 161             goto done_cycle;
 162         } else if (done)
 163             goto done_cycle;
 164
 165         if (!focus_order)
 166             goto done_cycle;
 167
 168         if (!first) first = focus_client;
 169
 170         if (linear) list = client_list;
 171         else        list = focus_order;
 172     } else {
 173         if (!focus_order)
 174             goto done_cycle;
 175         list = client_list;
 176     }
 177     if (!focus_cycle_target) focus_cycle_target = focus_client;
 178
 179     start = it = g_list_find(list, focus_cycle_target);
 180     if (!start) /* switched desktops or something? */
 181         start = it = forward ? g_list_last(list) : g_list_first(list);
 182     if (!start) goto done_cycle;
 183
 184     do {
 185         if (forward) {
 186             it = it->next;
 187             if (it == NULL) it = g_list_first(list);
 188         } else {
 189             it = it->prev;
 190             if (it == NULL) it = g_list_last(list);
 191         }
 192         ft = it->data;
 193         if (focus_cycle_target_valid(ft, all_desktops, dock_windows,
 194                                      desktop_windows))
 195         {
 196             if (interactive) {
 197                 if (ft != focus_cycle_target) { /* prevents flicker */
 198                     focus_cycle_target = ft;
 199                     focus_cycle_draw_indicator(ft);
 200                 }
 201                 if (dialog)
 202                     /* same arguments as focus_target_valid */
 203                     focus_cycle_popup_show(ft, all_desktops, dock_windows,
 204                                            desktop_windows);
 205                 return;
 206             } else if (ft != focus_cycle_target) {
 207                 focus_cycle_target = ft;
 208                 done = TRUE;
 209                 break;
 210             }
 211         }
 212     } while (it != start);
 213
 214 done_cycle:
 215     if (done && focus_cycle_target)
 216         client_activate(focus_cycle_target, FALSE, TRUE);
 217
 218     t = NULL;
 219     first = NULL;
 220     focus_cycle_target = NULL;
 221     g_list_free(order);
 222     order = NULL;
 223
 224     if (interactive) {
 225         focus_cycle_draw_indicator(NULL);
 226         focus_cycle_popup_hide();
 227     }
 228
 229     return;
 230 }
 231
 232 /* this be mostly ripped from fvwm */
 233 static ObClient *focus_find_directional(ObClient *c, ObDirection dir,
 234                                         gboolean dock_windows,
 235                                         gboolean desktop_windows)
 236 {
 237     gint my_cx, my_cy, his_cx, his_cy;
 238     gint offset = 0;
 239     gint distance = 0;
 240     gint score, best_score;
 241     ObClient *best_client, *cur;
 242     GList *it;
 243
 244     if(!client_list)
 245         return NULL;
 246
 247     /* first, find the centre coords of the currently focused window */
 248     my_cx = c->frame->area.x + c->frame->area.width / 2;
 249     my_cy = c->frame->area.y + c->frame->area.height / 2;
 250
 251     best_score = -1;
 252     best_client = NULL;
 253
 254     for(it = g_list_first(client_list); it; it = g_list_next(it)) {
 255         cur = it->data;
 256
 257         /* the currently selected window isn't interesting */
 258         if(cur == c)
 259             continue;
 260         if (cur->type == OB_CLIENT_TYPE_DOCK && !dock_windows)
 261             continue;
 262         if (cur->type == OB_CLIENT_TYPE_DESKTOP && !desktop_windows)
 263             continue;
 264         if (!client_normal(cur) &&
 265             cur->type != OB_CLIENT_TYPE_DOCK &&
 266             cur->type != OB_CLIENT_TYPE_DESKTOP)
 267             continue;
 268         /* using c->desktop instead of screen_desktop doesn't work if the
 269          * current window was omnipresent, hope this doesn't have any other
 270          * side effects */
 271         if(screen_desktop != cur->desktop && cur->desktop != DESKTOP_ALL)
 272             continue;
 273         if(cur->iconic)
 274             continue;
 275         if(!(client_focus_target(cur) == cur &&
 276              client_can_focus(cur)))
 277             continue;
 278
 279         /* find the centre coords of this window, from the
 280          * currently focused window's point of view */
 281         his_cx = (cur->frame->area.x - my_cx)
 282             + cur->frame->area.width / 2;
 283         his_cy = (cur->frame->area.y - my_cy)
 284             + cur->frame->area.height / 2;
 285
 286         if(dir == OB_DIRECTION_NORTHEAST || dir == OB_DIRECTION_SOUTHEAST ||
 287            dir == OB_DIRECTION_SOUTHWEST || dir == OB_DIRECTION_NORTHWEST) {
 288             gint tx;
 289             /* Rotate the diagonals 45 degrees counterclockwise.
 290              * To do this, multiply the matrix /+h +h\ with the
 291              * vector (x y).                   \-h +h/
 292              * h = sqrt(0.5). We can set h := 1 since absolute
 293              * distance doesn't matter here. */
 294             tx = his_cx + his_cy;
 295             his_cy = -his_cx + his_cy;
 296             his_cx = tx;
 297         }
 298
 299         switch(dir) {
 300         case OB_DIRECTION_NORTH:
 301         case OB_DIRECTION_SOUTH:
 302         case OB_DIRECTION_NORTHEAST:
 303         case OB_DIRECTION_SOUTHWEST:
 304             offset = (his_cx < 0) ? -his_cx : his_cx;
 305             distance = ((dir == OB_DIRECTION_NORTH ||
 306                          dir == OB_DIRECTION_NORTHEAST) ?
 307                         -his_cy : his_cy);
 308             break;
 309         case OB_DIRECTION_EAST:
 310         case OB_DIRECTION_WEST:
 311         case OB_DIRECTION_SOUTHEAST:
 312         case OB_DIRECTION_NORTHWEST:
 313             offset = (his_cy < 0) ? -his_cy : his_cy;
 314             distance = ((dir == OB_DIRECTION_WEST ||
 315                          dir == OB_DIRECTION_NORTHWEST) ?
 316                         -his_cx : his_cx);
 317             break;
 318         }
 319
 320         /* the target must be in the requested direction */
 321         if(distance <= 0)
 322             continue;
 323
 324         /* Calculate score for this window.  The smaller the better. */
 325         score = distance + offset;
 326
 327         /* windows more than 45 degrees off the direction are
 328          * heavily penalized and will only be chosen if nothing
 329          * else within a million pixels */
 330         if(offset > distance)
 331             score += 1000000;
 332
 333         if(best_score == -1 || score < best_score)
 334             best_client = cur,
 335                 best_score = score;
 336     }
 337
 338     return best_client;
 339 }
 340
 341 void focus_directional_cycle(ObDirection dir, gboolean dock_windows,
 342                              gboolean desktop_windows, gboolean interactive,
 343                              gboolean dialog, gboolean done, gboolean cancel)
 344 {
 345     static ObClient *first = NULL;
 346     ObClient *ft = NULL;
 347
 348     if (!interactive)
 349         return;
 350
 351     if (cancel) {
 352         focus_cycle_target = NULL;
 353         goto done_cycle;
 354     } else if (done)
 355         goto done_cycle;
 356
 357     if (!focus_order)
 358         goto done_cycle;
 359
 360     if (!first) first = focus_client;
 361     if (!focus_cycle_target) focus_cycle_target = focus_client;
 362
 363     if (focus_cycle_target)
 364         ft = focus_find_directional(focus_cycle_target, dir, dock_windows,
 365                                     desktop_windows);
 366     else {
 367         GList *it;
 368
 369         for (it = focus_order; it; it = g_list_next(it))
 370             if (focus_cycle_target_valid(it->data, FALSE, dock_windows,
 371                                          desktop_windows))
 372                 ft = it->data;
 373     }
 374
 375     if (ft) {
 376         if (ft != focus_cycle_target) {/* prevents flicker */
 377             focus_cycle_target = ft;
 378             focus_cycle_draw_indicator(ft);
 379         }
 380     }
 381     if (focus_cycle_target && dialog) {
 382         /* same arguments as focus_target_valid */
 383         focus_cycle_popup_show(focus_cycle_target, FALSE, dock_windows,
 384                                desktop_windows);
 385         return;
 386     }
 387
 388 done_cycle:
 389     if (done && focus_cycle_target)
 390         client_activate(focus_cycle_target, FALSE, TRUE);
 391
 392     first = NULL;
 393     focus_cycle_target = NULL;
 394
 395     focus_cycle_draw_indicator(NULL);
 396     focus_cycle_popup_hide();
 397
 398     return;
 399 }
 400
 401 void focus_order_add_new(ObClient *c)
 402 {
 403     if (c->iconic)
 404         focus_order_to_top(c);
 405     else {
 406         g_assert(!g_list_find(focus_order, c));
 407         /* if there are any iconic windows, put this above them in the order,
 408            but if there are not, then put it under the currently focused one */
 409         if (focus_order && ((ObClient*)focus_order->data)->iconic)
 410             focus_order = g_list_insert(focus_order, c, 0);
 411         else
 412             focus_order = g_list_insert(focus_order, c, 1);
 413     }
 414 }
 415