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
  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         /* shortcut check, it is what we are pointing at right now */
  60         (ifclient == focus_cycle_target ||
  61          /* it's shown but it shouldn't be anymore */
  62          focus_cycle_popup_is_showing(ifclient) ||
  63          /* it's not shown but it should be */
  64          focus_valid_target(ifclient, TRUE,
  65                             focus_cycle_iconic_windows,
  66                             focus_cycle_all_desktops,
  67                             focus_cycle_dock_windows,
  68                             focus_cycle_desktop_windows,
  69                             FALSE)))
  70     {
  71         focus_cycle(TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE,TRUE);
  72         focus_directional_cycle(0, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE);
  73     }
  74 }
  75
  76 ObClient* focus_cycle(gboolean forward, gboolean all_desktops,
  77                       gboolean dock_windows, gboolean desktop_windows,
  78                       gboolean linear, gboolean interactive,
  79                       gboolean showbar, gboolean dialog,
  80                       gboolean done, gboolean cancel)
  81 {
  82     static GList *order = NULL;
  83     GList *it, *start, *list;
  84     ObClient *ft = NULL;
  85     ObClient *ret = NULL;
  86
  87     if (interactive) {
  88         if (cancel) {
  89             focus_cycle_target = NULL;
  90             goto done_cycle;
  91         } else if (done)
  92             goto done_cycle;
  93
  94         if (!focus_order)
  95             goto done_cycle;
  96
  97         if (linear) list = client_list;
  98         else        list = focus_order;
  99     } else {
 100         if (!focus_order)
 101             goto done_cycle;
 102         list = client_list;
 103     }
 104
 105     if (focus_cycle_target == NULL) {
 106         focus_cycle_iconic_windows = TRUE;
 107         focus_cycle_all_desktops = all_desktops;
 108         focus_cycle_dock_windows = dock_windows;
 109         focus_cycle_desktop_windows = desktop_windows;
 110         start = it = g_list_find(list, focus_client);
 111     } else
 112         start = it = g_list_find(list, focus_cycle_target);
 113
 114     if (!start) /* switched desktops or something? */
 115         start = it = forward ? g_list_last(list) : g_list_first(list);
 116     if (!start) goto done_cycle;
 117
 118     do {
 119         if (forward) {
 120             it = it->next;
 121             if (it == NULL) it = g_list_first(list);
 122         } else {
 123             it = it->prev;
 124             if (it == NULL) it = g_list_last(list);
 125         }
 126         ft = it->data;
 127         if (focus_valid_target(ft, TRUE,
 128                                focus_cycle_iconic_windows,
 129                                focus_cycle_all_desktops,
 130                                focus_cycle_dock_windows,
 131                                focus_cycle_desktop_windows,
 132                                FALSE))
 133         {
 134             if (interactive) {
 135                 if (ft != focus_cycle_target) { /* prevents flicker */
 136                     focus_cycle_target = ft;
 137                     focus_cycle_draw_indicator(showbar ? ft : NULL);
 138                 }
 139                 if (dialog)
 140                     /* same arguments as focus_target_valid */
 141                     focus_cycle_popup_show(ft,
 142                                            focus_cycle_iconic_windows,
 143                                            focus_cycle_all_desktops,
 144                                            focus_cycle_dock_windows,
 145                                            focus_cycle_desktop_windows);
 146                 return focus_cycle_target;
 147             } else if (ft != focus_cycle_target) {
 148                 focus_cycle_target = ft;
 149                 done = TRUE;
 150                 break;
 151             }
 152         }
 153     } while (it != start);
 154
 155 done_cycle:
 156     if (done && !cancel) ret = focus_cycle_target;
 157
 158     focus_cycle_target = NULL;
 159     g_list_free(order);
 160     order = NULL;
 161
 162     if (interactive) {
 163         focus_cycle_draw_indicator(NULL);
 164         focus_cycle_popup_hide();
 165     }
 166
 167     return ret;
 168 }
 169
 170 /* this be mostly ripped from fvwm */
 171 static ObClient *focus_find_directional(ObClient *c, ObDirection dir,
 172                                         gboolean dock_windows,
 173                                         gboolean desktop_windows)
 174 {
 175     gint my_cx, my_cy, his_cx, his_cy;
 176     gint offset = 0;
 177     gint distance = 0;
 178     gint score, best_score;
 179     ObClient *best_client, *cur;
 180     GList *it;
 181
 182     if (!client_list)
 183         return NULL;
 184
 185     /* first, find the centre coords of the currently focused window */
 186     my_cx = c->frame->area.x + c->frame->area.width / 2;
 187     my_cy = c->frame->area.y + c->frame->area.height / 2;
 188
 189     best_score = -1;
 190     best_client = c;
 191
 192     for (it = g_list_first(client_list); it; it = g_list_next(it)) {
 193         cur = it->data;
 194
 195         /* the currently selected window isn't interesting */
 196         if (cur == c)
 197             continue;
 198         if (!focus_valid_target(it->data, TRUE, FALSE, FALSE, dock_windows,
 199                                 desktop_windows, FALSE))
 200             continue;
 201
 202         /* find the centre coords of this window, from the
 203          * currently focused window's point of view */
 204         his_cx = (cur->frame->area.x - my_cx)
 205             + cur->frame->area.width / 2;
 206         his_cy = (cur->frame->area.y - my_cy)
 207             + cur->frame->area.height / 2;
 208
 209         if (dir == OB_DIRECTION_NORTHEAST || dir == OB_DIRECTION_SOUTHEAST ||
 210             dir == OB_DIRECTION_SOUTHWEST || dir == OB_DIRECTION_NORTHWEST)
 211         {
 212             gint tx;
 213             /* Rotate the diagonals 45 degrees counterclockwise.
 214              * To do this, multiply the matrix /+h +h\ with the
 215              * vector (x y).                   \-h +h/
 216              * h = sqrt(0.5). We can set h := 1 since absolute
 217              * distance doesn't matter here. */
 218             tx = his_cx + his_cy;
 219             his_cy = -his_cx + his_cy;
 220             his_cx = tx;
 221         }
 222
 223         switch (dir) {
 224         case OB_DIRECTION_NORTH:
 225         case OB_DIRECTION_SOUTH:
 226         case OB_DIRECTION_NORTHEAST:
 227         case OB_DIRECTION_SOUTHWEST:
 228             offset = (his_cx < 0) ? -his_cx : his_cx;
 229             distance = ((dir == OB_DIRECTION_NORTH ||
 230                          dir == OB_DIRECTION_NORTHEAST) ?
 231                         -his_cy : his_cy);
 232             break;
 233         case OB_DIRECTION_EAST:
 234         case OB_DIRECTION_WEST:
 235         case OB_DIRECTION_SOUTHEAST:
 236         case OB_DIRECTION_NORTHWEST:
 237             offset = (his_cy < 0) ? -his_cy : his_cy;
 238             distance = ((dir == OB_DIRECTION_WEST ||
 239                          dir == OB_DIRECTION_NORTHWEST) ?
 240                         -his_cx : his_cx);
 241             break;
 242         }
 243
 244         /* the target must be in the requested direction */
 245         if (distance <= 0)
 246             continue;
 247
 248         /* Calculate score for this window.  The smaller the better. */
 249         score = distance + offset;
 250
 251         /* windows more than 45 degrees off the direction are
 252          * heavily penalized and will only be chosen if nothing
 253          * else within a million pixels */
 254         if (offset > distance)
 255             score += 1000000;
 256
 257         if (best_score == -1 || score < best_score) {
 258             best_client = cur;
 259             best_score = score;
 260         }
 261     }
 262
 263     return best_client;
 264 }
 265
 266 ObClient* focus_directional_cycle(ObDirection dir, gboolean dock_windows,
 267                                   gboolean desktop_windows,
 268                                   gboolean interactive,
 269                                   gboolean showbar, gboolean dialog,
 270                                   gboolean done, gboolean cancel)
 271 {
 272     static ObClient *first = NULL;
 273     ObClient *ft = NULL;
 274     ObClient *ret = NULL;
 275
 276     if (cancel) {
 277         focus_cycle_target = NULL;
 278         goto done_cycle;
 279     } else if (done && interactive)
 280         goto done_cycle;
 281
 282     if (!focus_order)
 283         goto done_cycle;
 284
 285     if (focus_cycle_target == NULL) {
 286         focus_cycle_iconic_windows = FALSE;
 287         focus_cycle_all_desktops = FALSE;
 288         focus_cycle_dock_windows = dock_windows;
 289         focus_cycle_desktop_windows = desktop_windows;
 290     }
 291
 292     if (!first) first = focus_client;
 293
 294     if (focus_cycle_target)
 295         ft = focus_find_directional(focus_cycle_target, dir, dock_windows,
 296                                     desktop_windows);
 297     else if (first)
 298         ft = focus_find_directional(first, dir, dock_windows, desktop_windows);
 299     else {
 300         GList *it;
 301
 302         for (it = focus_order; it; it = g_list_next(it))
 303             if (focus_valid_target(it->data, TRUE,
 304                                    focus_cycle_iconic_windows,
 305                                    focus_cycle_all_desktops,
 306                                    focus_cycle_dock_windows,
 307                                    focus_cycle_desktop_windows, FALSE))
 308                 ft = it->data;
 309     }
 310
 311     if (ft && ft != focus_cycle_target) {/* prevents flicker */
 312         focus_cycle_target = ft;
 313         if (!interactive)
 314             goto done_cycle;
 315         focus_cycle_draw_indicator(showbar ? ft : NULL);
 316     }
 317     if (focus_cycle_target && dialog)
 318         /* same arguments as focus_target_valid */
 319         focus_cycle_popup_single_show(focus_cycle_target,
 320                                       focus_cycle_iconic_windows,
 321                                       focus_cycle_all_desktops,
 322                                       focus_cycle_dock_windows,
 323                                       focus_cycle_desktop_windows);
 324     return focus_cycle_target;
 325
 326 done_cycle:
 327     if (done && !cancel) ret = focus_cycle_target;
 328
 329     first = NULL;
 330     focus_cycle_target = NULL;
 331
 332     focus_cycle_draw_indicator(NULL);
 333     focus_cycle_popup_single_hide();
 334
 335     return ret;
 336 }