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