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     /* modal windows are important and can always get focus if they are
 128        visible and stuff, so don't change 'ok' based on their type */
 129     else if (!ft->modal)
 130         /* normal non-helper windows are valid targets */
 131         ok = ok &&
 132             ((client_normal(ft) && !client_helper(ft))
 133              ||
 134              /* helper windows are valid targets it... */
 135              (client_helper(ft) &&
 136               /* ...a window in its group already has focus ... */
 137               ((focus_client && ft->group == focus_client->group) ||
 138                /* ... or if there are no other windows in its group
 139                   that can be cycled to instead */
 140                !focus_target_has_siblings(ft, iconic_windows, all_desktops))));
 141
 142     /* it's not set to skip the taskbar (unless it is a type that would be
 143        expected to set this hint, or modal) */
 144     ok = ok && ((ft->type == OB_CLIENT_TYPE_DOCK ||
 145                  ft->type == OB_CLIENT_TYPE_DESKTOP ||
 146                  ft->type == OB_CLIENT_TYPE_TOOLBAR ||
 147                  ft->type == OB_CLIENT_TYPE_MENU ||
 148                  ft->type == OB_CLIENT_TYPE_UTILITY) ||
 149                 ft->modal ||
 150                 !ft->skip_taskbar);
 151
 152     /* it's not going to just send fous off somewhere else (modal window) */
 153     ok = ok && ft == client_focus_target(ft);
 154
 155     return ok;
 156 }
 157
 158 void focus_cycle(gboolean forward, gboolean all_desktops,
 159                  gboolean dock_windows, gboolean desktop_windows,
 160                  gboolean linear, gboolean interactive,
 161                  gboolean dialog, gboolean done, gboolean cancel)
 162 {
 163     static ObClient *first = NULL;
 164     static ObClient *t = NULL;
 165     static GList *order = NULL;
 166     GList *it, *start, *list;
 167     ObClient *ft = NULL;
 168
 169     if (interactive) {
 170         if (cancel) {
 171             focus_cycle_target = NULL;
 172             goto done_cycle;
 173         } else if (done)
 174             goto done_cycle;
 175
 176         if (!focus_order)
 177             goto done_cycle;
 178
 179         if (!first) first = focus_client;
 180
 181         if (linear) list = client_list;
 182         else        list = focus_order;
 183     } else {
 184         if (!focus_order)
 185             goto done_cycle;
 186         list = client_list;
 187     }
 188     if (!focus_cycle_target) focus_cycle_target = focus_client;
 189
 190     start = it = g_list_find(list, focus_cycle_target);
 191     if (!start) /* switched desktops or something? */
 192         start = it = forward ? g_list_last(list) : g_list_first(list);
 193     if (!start) goto done_cycle;
 194
 195     do {
 196         if (forward) {
 197             it = it->next;
 198             if (it == NULL) it = g_list_first(list);
 199         } else {
 200             it = it->prev;
 201             if (it == NULL) it = g_list_last(list);
 202         }
 203         ft = it->data;
 204         if (focus_cycle_target_valid(ft, TRUE,
 205                                      all_desktops, dock_windows,
 206                                      desktop_windows))
 207         {
 208             if (interactive) {
 209                 if (ft != focus_cycle_target) { /* prevents flicker */
 210                     focus_cycle_target = ft;
 211                     focus_cycle_draw_indicator(ft);
 212                 }
 213                 if (dialog)
 214                     /* same arguments as focus_target_valid */
 215                     focus_cycle_popup_show(ft, TRUE,
 216                                            all_desktops, dock_windows,
 217                                            desktop_windows);
 218                 return;
 219             } else if (ft != focus_cycle_target) {
 220                 focus_cycle_target = ft;
 221                 done = TRUE;
 222                 break;
 223             }
 224         }
 225     } while (it != start);
 226
 227 done_cycle:
 228     if (done && focus_cycle_target)
 229         client_activate(focus_cycle_target, FALSE, TRUE);
 230
 231     t = NULL;
 232     first = NULL;
 233     focus_cycle_target = NULL;
 234     g_list_free(order);
 235     order = NULL;
 236
 237     if (interactive) {
 238         focus_cycle_draw_indicator(NULL);
 239         focus_cycle_popup_hide();
 240     }
 241
 242     return;
 243 }
 244
 245 /* this be mostly ripped from fvwm */
 246 static ObClient *focus_find_directional(ObClient *c, ObDirection dir,
 247                                         gboolean dock_windows,
 248                                         gboolean desktop_windows)
 249 {
 250     gint my_cx, my_cy, his_cx, his_cy;
 251     gint offset = 0;
 252     gint distance = 0;
 253     gint score, best_score;
 254     ObClient *best_client, *cur;
 255     GList *it;
 256
 257     if(!client_list)
 258         return NULL;
 259
 260     /* first, find the centre coords of the currently focused window */
 261     my_cx = c->frame->area.x + c->frame->area.width / 2;
 262     my_cy = c->frame->area.y + c->frame->area.height / 2;
 263
 264     best_score = -1;
 265     best_client = NULL;
 266
 267     for(it = g_list_first(client_list); it; it = g_list_next(it)) {
 268         cur = it->data;
 269
 270         /* the currently selected window isn't interesting */
 271         if(cur == c)
 272             continue;
 273         if (!focus_cycle_target_valid(it->data, FALSE, FALSE, dock_windows,
 274                                       desktop_windows))
 275             continue;
 276
 277         /* find the centre coords of this window, from the
 278          * currently focused window's point of view */
 279         his_cx = (cur->frame->area.x - my_cx)
 280             + cur->frame->area.width / 2;
 281         his_cy = (cur->frame->area.y - my_cy)
 282             + cur->frame->area.height / 2;
 283
 284         if(dir == OB_DIRECTION_NORTHEAST || dir == OB_DIRECTION_SOUTHEAST ||
 285            dir == OB_DIRECTION_SOUTHWEST || dir == OB_DIRECTION_NORTHWEST) {
 286             gint tx;
 287             /* Rotate the diagonals 45 degrees counterclockwise.
 288              * To do this, multiply the matrix /+h +h\ with the
 289              * vector (x y).                   \-h +h/
 290              * h = sqrt(0.5). We can set h := 1 since absolute
 291              * distance doesn't matter here. */
 292             tx = his_cx + his_cy;
 293             his_cy = -his_cx + his_cy;
 294             his_cx = tx;
 295         }
 296
 297         switch(dir) {
 298         case OB_DIRECTION_NORTH:
 299         case OB_DIRECTION_SOUTH:
 300         case OB_DIRECTION_NORTHEAST:
 301         case OB_DIRECTION_SOUTHWEST:
 302             offset = (his_cx < 0) ? -his_cx : his_cx;
 303             distance = ((dir == OB_DIRECTION_NORTH ||
 304                          dir == OB_DIRECTION_NORTHEAST) ?
 305                         -his_cy : his_cy);
 306             break;
 307         case OB_DIRECTION_EAST:
 308         case OB_DIRECTION_WEST:
 309         case OB_DIRECTION_SOUTHEAST:
 310         case OB_DIRECTION_NORTHWEST:
 311             offset = (his_cy < 0) ? -his_cy : his_cy;
 312             distance = ((dir == OB_DIRECTION_WEST ||
 313                          dir == OB_DIRECTION_NORTHWEST) ?
 314                         -his_cx : his_cx);
 315             break;
 316         }
 317
 318         /* the target must be in the requested direction */
 319         if(distance <= 0)
 320             continue;
 321
 322         /* Calculate score for this window.  The smaller the better. */
 323         score = distance + offset;
 324
 325         /* windows more than 45 degrees off the direction are
 326          * heavily penalized and will only be chosen if nothing
 327          * else within a million pixels */
 328         if(offset > distance)
 329             score += 1000000;
 330
 331         if(best_score == -1 || score < best_score)
 332             best_client = cur,
 333                 best_score = score;
 334     }
 335
 336     return best_client;
 337 }
 338
 339 void focus_directional_cycle(ObDirection dir, gboolean dock_windows,
 340                              gboolean desktop_windows, gboolean interactive,
 341                              gboolean dialog, gboolean done, gboolean cancel)
 342 {
 343     static ObClient *first = NULL;
 344     ObClient *ft = NULL;
 345
 346     if (!interactive)
 347         return;
 348
 349     if (cancel) {
 350         focus_cycle_target = NULL;
 351         goto done_cycle;
 352     } else if (done)
 353         goto done_cycle;
 354
 355     if (!focus_order)
 356         goto done_cycle;
 357
 358     if (!first) first = focus_client;
 359     if (!focus_cycle_target) focus_cycle_target = focus_client;
 360
 361     if (focus_cycle_target)
 362         ft = focus_find_directional(focus_cycle_target, dir, dock_windows,
 363                                     desktop_windows);
 364     else {
 365         GList *it;
 366
 367         for (it = focus_order; it; it = g_list_next(it))
 368             if (focus_cycle_target_valid(it->data, FALSE, FALSE, dock_windows,
 369                                          desktop_windows))
 370                 ft = it->data;
 371     }
 372
 373     if (ft) {
 374         if (ft != focus_cycle_target) {/* prevents flicker */
 375             focus_cycle_target = ft;
 376             focus_cycle_draw_indicator(ft);
 377         }
 378     }
 379     if (focus_cycle_target && dialog) {
 380         /* same arguments as focus_target_valid */
 381         focus_cycle_popup_single_show(focus_cycle_target,
 382                                       FALSE, FALSE, dock_windows,
 383                                       desktop_windows);
 384         return;
 385     }
 386
 387 done_cycle:
 388     if (done && focus_cycle_target)
 389         client_activate(focus_cycle_target, FALSE, TRUE);
 390
 391     first = NULL;
 392     focus_cycle_target = NULL;
 393
 394     focus_cycle_draw_indicator(NULL);
 395     focus_cycle_popup_single_hide();
 396
 397     return;
 398 }
 399
 400 void focus_order_add_new(ObClient *c)
 401 {
 402     if (c->iconic)
 403         focus_order_to_top(c);
 404     else {
 405         g_assert(!g_list_find(focus_order, c));
 406         /* if there are any iconic windows, put this above them in the order,
 407            but if there are not, then put it under the currently focused one */
 408         if (focus_order && ((ObClient*)focus_order->data)->iconic)
 409             focus_order = g_list_insert(focus_order, c, 0);
 410         else
 411             focus_order = g_list_insert(focus_order, c, 1);
 412     }
 413 }
 414