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
  30 #include <X11/Xlib.h>
  31 #include <glib.h>
  32
  33 ObClient       *focus_cycle_target = NULL;
  34 static gboolean focus_cycle_iconic_windows;
  35 static gboolean focus_cycle_all_desktops;
  36 static gboolean focus_cycle_dock_windows;
  37 static gboolean focus_cycle_desktop_windows;
  38
  39 static ObClient *focus_find_directional(ObClient *c,
  40                                         ObDirection dir,
  41                                         gboolean dock_windows,
  42                                         gboolean desktop_windows);
  43
  44 void focus_cycle_startup(gboolean reconfig)
  45 {
  46     if (reconfig) return;
  47 }
  48
  49 void focus_cycle_shutdown(gboolean reconfig)
  50 {
  51     if (reconfig) return;
  52 }
  53
  54 void focus_cycle_stop(ObClient *ifclient)
  55 {
  56     /* stop focus cycling if the given client is a valid focus target,
  57        and so the cycling is being disrupted */
  58     if (focus_cycle_target && ifclient &&
  59         focus_valid_target(ifclient, TRUE,
  60                            focus_cycle_iconic_windows,
  61                            focus_cycle_all_desktops,
  62                            focus_cycle_dock_windows,
  63                            focus_cycle_desktop_windows))
  64     {
  65         focus_cycle(TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE,TRUE);
  66         focus_directional_cycle(0, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE);
  67     }
  68 }
  69
  70 ObClient* focus_cycle(gboolean forward, gboolean all_desktops,
  71                       gboolean dock_windows, gboolean desktop_windows,
  72                       gboolean linear, gboolean interactive,
  73                       gboolean showbar, gboolean dialog,
  74                       gboolean done, gboolean cancel)
  75 {
  76     static GList *order = NULL;
  77     GList *it, *start, *list;
  78     ObClient *ft = NULL;
  79     ObClient *ret = NULL;
  80
  81     if (interactive) {
  82         if (cancel) {
  83             focus_cycle_target = NULL;
  84             goto done_cycle;
  85         } else if (done)
  86             goto done_cycle;
  87
  88         if (!focus_order)
  89             goto done_cycle;
  90
  91         if (linear) list = client_list;
  92         else        list = focus_order;
  93     } else {
  94         if (!focus_order)
  95             goto done_cycle;
  96         list = client_list;
  97     }
  98
  99     if (focus_cycle_target == NULL) {
 100         focus_cycle_iconic_windows = TRUE;
 101         focus_cycle_all_desktops = all_desktops;
 102         focus_cycle_dock_windows = dock_windows;
 103         focus_cycle_desktop_windows = desktop_windows;
 104         start = it = g_list_find(list, focus_client);
 105     } else
 106         start = it = g_list_find(list, focus_cycle_target);
 107
 108     if (!start) /* switched desktops or something? */
 109         start = it = forward ? g_list_last(list) : g_list_first(list);
 110     if (!start) goto done_cycle;
 111
 112     do {
 113         if (forward) {
 114             it = it->next;
 115             if (it == NULL) it = g_list_first(list);
 116         } else {
 117             it = it->prev;
 118             if (it == NULL) it = g_list_last(list);
 119         }
 120         ft = it->data;
 121         if (focus_valid_target(ft, TRUE,
 122                                focus_cycle_iconic_windows,
 123                                focus_cycle_all_desktops,
 124                                focus_cycle_dock_windows,
 125                                focus_cycle_desktop_windows))
 126         {
 127             if (interactive) {
 128                 if (ft != focus_cycle_target) { /* prevents flicker */
 129                     focus_cycle_target = ft;
 130                     focus_cycle_draw_indicator(showbar ? ft : NULL);
 131                 }
 132                 if (dialog)
 133                     /* same arguments as focus_target_valid */
 134                     focus_cycle_popup_show(ft,
 135                                            focus_cycle_iconic_windows,
 136                                            focus_cycle_all_desktops,
 137                                            focus_cycle_dock_windows,
 138                                            focus_cycle_desktop_windows);
 139                 return focus_cycle_target;
 140             } else if (ft != focus_cycle_target) {
 141                 focus_cycle_target = ft;
 142                 done = TRUE;
 143                 break;
 144             }
 145         }
 146     } while (it != start);
 147
 148 done_cycle:
 149     if (done && !cancel) ret = focus_cycle_target;
 150
 151     focus_cycle_target = NULL;
 152     g_list_free(order);
 153     order = NULL;
 154
 155     if (interactive) {
 156         focus_cycle_draw_indicator(NULL);
 157         focus_cycle_popup_hide();
 158     }
 159
 160     return ret;
 161 }
 162
 163 /* this be mostly ripped from fvwm */
 164 static ObClient *focus_find_directional(ObClient *c, ObDirection dir,
 165                                         gboolean dock_windows,
 166                                         gboolean desktop_windows)
 167 {
 168     gint my_cx, my_cy, his_cx, his_cy;
 169     gint offset = 0;
 170     gint distance = 0;
 171     gint score, best_score;
 172     ObClient *best_client, *cur;
 173     GList *it;
 174
 175     if (!client_list)
 176         return NULL;
 177
 178     /* first, find the centre coords of the currently focused window */
 179     my_cx = c->frame->area.x + c->frame->area.width / 2;
 180     my_cy = c->frame->area.y + c->frame->area.height / 2;
 181
 182     best_score = -1;
 183     best_client = c;
 184
 185     for (it = g_list_first(client_list); it; it = g_list_next(it)) {
 186         cur = it->data;
 187
 188         /* the currently selected window isn't interesting */
 189         if (cur == c)
 190             continue;
 191         if (!focus_valid_target(it->data, TRUE, FALSE, FALSE, dock_windows,
 192                                 desktop_windows))
 193             continue;
 194
 195         /* find the centre coords of this window, from the
 196          * currently focused window's point of view */
 197         his_cx = (cur->frame->area.x - my_cx)
 198             + cur->frame->area.width / 2;
 199         his_cy = (cur->frame->area.y - my_cy)
 200             + cur->frame->area.height / 2;
 201
 202         if (dir == OB_DIRECTION_NORTHEAST || dir == OB_DIRECTION_SOUTHEAST ||
 203             dir == OB_DIRECTION_SOUTHWEST || dir == OB_DIRECTION_NORTHWEST)
 204         {
 205             gint tx;
 206             /* Rotate the diagonals 45 degrees counterclockwise.
 207              * To do this, multiply the matrix /+h +h\ with the
 208              * vector (x y).                   \-h +h/
 209              * h = sqrt(0.5). We can set h := 1 since absolute
 210              * distance doesn't matter here. */
 211             tx = his_cx + his_cy;
 212             his_cy = -his_cx + his_cy;
 213             his_cx = tx;
 214         }
 215
 216         switch (dir) {
 217         case OB_DIRECTION_NORTH:
 218         case OB_DIRECTION_SOUTH:
 219         case OB_DIRECTION_NORTHEAST:
 220         case OB_DIRECTION_SOUTHWEST:
 221             offset = (his_cx < 0) ? -his_cx : his_cx;
 222             distance = ((dir == OB_DIRECTION_NORTH ||
 223                          dir == OB_DIRECTION_NORTHEAST) ?
 224                         -his_cy : his_cy);
 225             break;
 226         case OB_DIRECTION_EAST:
 227         case OB_DIRECTION_WEST:
 228         case OB_DIRECTION_SOUTHEAST:
 229         case OB_DIRECTION_NORTHWEST:
 230             offset = (his_cy < 0) ? -his_cy : his_cy;
 231             distance = ((dir == OB_DIRECTION_WEST ||
 232                          dir == OB_DIRECTION_NORTHWEST) ?
 233                         -his_cx : his_cx);
 234             break;
 235         }
 236
 237         /* the target must be in the requested direction */
 238         if (distance <= 0)
 239             continue;
 240
 241         /* Calculate score for this window.  The smaller the better. */
 242         score = distance + offset;
 243
 244         /* windows more than 45 degrees off the direction are
 245          * heavily penalized and will only be chosen if nothing
 246          * else within a million pixels */
 247         if (offset > distance)
 248             score += 1000000;
 249
 250         if (best_score == -1 || score < best_score) {
 251             best_client = cur;
 252             best_score = score;
 253         }
 254     }
 255
 256     return best_client;
 257 }
 258
 259 ObClient* focus_directional_cycle(ObDirection dir, gboolean dock_windows,
 260                                   gboolean desktop_windows,
 261                                   gboolean interactive,
 262                                   gboolean showbar, gboolean dialog,
 263                                   gboolean done, gboolean cancel)
 264 {
 265     static ObClient *first = NULL;
 266     ObClient *ft = NULL;
 267     ObClient *ret = NULL;
 268
 269     if (cancel) {
 270         focus_cycle_target = NULL;
 271         goto done_cycle;
 272     } else if (done && interactive)
 273         goto done_cycle;
 274
 275     if (!focus_order)
 276         goto done_cycle;
 277
 278     if (focus_cycle_target == NULL) {
 279         focus_cycle_iconic_windows = FALSE;
 280         focus_cycle_all_desktops = FALSE;
 281         focus_cycle_dock_windows = dock_windows;
 282         focus_cycle_desktop_windows = desktop_windows;
 283     }
 284
 285     if (!first) first = focus_client;
 286
 287     if (focus_cycle_target)
 288         ft = focus_find_directional(focus_cycle_target, dir, dock_windows,
 289                                     desktop_windows);
 290     else if (first)
 291         ft = focus_find_directional(first, dir, dock_windows, desktop_windows);
 292     else {
 293         GList *it;
 294
 295         for (it = focus_order; it; it = g_list_next(it))
 296             if (focus_valid_target(it->data, TRUE,
 297                                    focus_cycle_iconic_windows,
 298                                    focus_cycle_all_desktops,
 299                                    focus_cycle_dock_windows,
 300                                    focus_cycle_desktop_windows))
 301                 ft = it->data;
 302     }
 303
 304     if (ft && ft != focus_cycle_target) {/* prevents flicker */
 305         focus_cycle_target = ft;
 306         if (!interactive)
 307             goto done_cycle;
 308         focus_cycle_draw_indicator(showbar ? ft : NULL);
 309     }
 310     if (focus_cycle_target && dialog)
 311         /* same arguments as focus_target_valid */
 312         focus_cycle_popup_single_show(focus_cycle_target,
 313                                       focus_cycle_iconic_windows,
 314                                       focus_cycle_all_desktops,
 315                                       focus_cycle_dock_windows,
 316                                       focus_cycle_desktop_windows);
 317     return focus_cycle_target;
 318
 319 done_cycle:
 320     if (done && !cancel) ret = focus_cycle_target;
 321
 322     first = NULL;
 323     focus_cycle_target = NULL;
 324
 325     focus_cycle_draw_indicator(NULL);
 326     focus_cycle_popup_single_hide();
 327
 328     return ret;
 329 }