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 "client.h"
  23 #include "frame.h"
  24 #include "focus.h"
  25 #include "screen.h"
  26 #include "openbox.h"
  27 #include "debug.h"
  28
  29 #include <X11/Xlib.h>
  30 #include <glib.h>
  31
  32 ObClient       *focus_cycle_target = NULL;
  33 static gboolean focus_cycle_iconic_windows;
  34 static gboolean focus_cycle_all_desktops;
  35 static gboolean focus_cycle_dock_windows;
  36 static gboolean focus_cycle_desktop_windows;
  37
  38 static ObClient *focus_find_directional(ObClient *c,
  39                                         ObDirection dir,
  40                                         gboolean dock_windows,
  41                                         gboolean desktop_windows);
  42
  43 void focus_cycle_startup(gboolean reconfig)
  44 {
  45     if (reconfig) return;
  46 }
  47
  48 void focus_cycle_shutdown(gboolean reconfig)
  49 {
  50     if (reconfig) return;
  51 }
  52
  53 void focus_cycle_stop(ObClient *ifclient)
  54 {
  55     /* stop focus cycling if the given client is a valid focus target,
  56        and so the cycling is being disrupted */
  57     if (focus_cycle_target && ifclient &&
  58         focus_valid_target(ifclient, TRUE,
  59                            focus_cycle_iconic_windows,
  60                            focus_cycle_all_desktops,
  61                            focus_cycle_dock_windows,
  62                            focus_cycle_desktop_windows,
  63                            FALSE))
  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, ObFocusCyclePopupMode mode,
  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                                FALSE))
 127         {
 128             if (interactive) {
 129                 if (ft != focus_cycle_target) { /* prevents flicker */
 130                     focus_cycle_target = ft;
 131                     focus_cycle_draw_indicator(showbar ? ft : NULL);
 132                 }
 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                                        mode);
 140                 return focus_cycle_target;
 141             } else if (ft != focus_cycle_target) {
 142                 focus_cycle_target = ft;
 143                 done = TRUE;
 144                 break;
 145             }
 146         }
 147     } while (it != start);
 148
 149 done_cycle:
 150     if (done && !cancel) ret = focus_cycle_target;
 151
 152     focus_cycle_target = NULL;
 153     g_list_free(order);
 154     order = NULL;
 155
 156     if (interactive) {
 157         focus_cycle_draw_indicator(NULL);
 158         focus_cycle_popup_hide();
 159     }
 160
 161     return ret;
 162 }
 163
 164 /* this be mostly ripped from fvwm */
 165 static ObClient *focus_find_directional(ObClient *c, ObDirection dir,
 166                                         gboolean dock_windows,
 167                                         gboolean desktop_windows)
 168 {
 169     gint my_cx, my_cy, his_cx, his_cy;
 170     gint offset = 0;
 171     gint distance = 0;
 172     gint score, best_score;
 173     ObClient *best_client, *cur;
 174     GList *it;
 175
 176     if (!client_list)
 177         return NULL;
 178
 179     /* first, find the centre coords of the currently focused window */
 180     my_cx = c->frame->area.x + c->frame->area.width / 2;
 181     my_cy = c->frame->area.y + c->frame->area.height / 2;
 182
 183     best_score = -1;
 184     best_client = c;
 185
 186     for (it = g_list_first(client_list); it; it = g_list_next(it)) {
 187         cur = it->data;
 188
 189         /* the currently selected window isn't interesting */
 190         if (cur == c)
 191             continue;
 192         if (!focus_valid_target(it->data, TRUE, FALSE, FALSE, dock_windows,
 193                                 desktop_windows, FALSE))
 194             continue;
 195
 196         /* find the centre coords of this window, from the
 197          * currently focused window's point of view */
 198         his_cx = (cur->frame->area.x - my_cx)
 199             + cur->frame->area.width / 2;
 200         his_cy = (cur->frame->area.y - my_cy)
 201             + cur->frame->area.height / 2;
 202
 203         if (dir == OB_DIRECTION_NORTHEAST || dir == OB_DIRECTION_SOUTHEAST ||
 204             dir == OB_DIRECTION_SOUTHWEST || dir == OB_DIRECTION_NORTHWEST)
 205         {
 206             gint tx;
 207             /* Rotate the diagonals 45 degrees counterclockwise.
 208              * To do this, multiply the matrix /+h +h\ with the
 209              * vector (x y).                   \-h +h/
 210              * h = sqrt(0.5). We can set h := 1 since absolute
 211              * distance doesn't matter here. */
 212             tx = his_cx + his_cy;
 213             his_cy = -his_cx + his_cy;
 214             his_cx = tx;
 215         }
 216
 217         switch (dir) {
 218         case OB_DIRECTION_NORTH:
 219         case OB_DIRECTION_SOUTH:
 220         case OB_DIRECTION_NORTHEAST:
 221         case OB_DIRECTION_SOUTHWEST:
 222             offset = (his_cx < 0) ? -his_cx : his_cx;
 223             distance = ((dir == OB_DIRECTION_NORTH ||
 224                          dir == OB_DIRECTION_NORTHEAST) ?
 225                         -his_cy : his_cy);
 226             break;
 227         case OB_DIRECTION_EAST:
 228         case OB_DIRECTION_WEST:
 229         case OB_DIRECTION_SOUTHEAST:
 230         case OB_DIRECTION_NORTHWEST:
 231             offset = (his_cy < 0) ? -his_cy : his_cy;
 232             distance = ((dir == OB_DIRECTION_WEST ||
 233                          dir == OB_DIRECTION_NORTHWEST) ?
 234                         -his_cx : his_cx);
 235             break;
 236         }
 237
 238         /* the target must be in the requested direction */
 239         if (distance <= 0)
 240             continue;
 241
 242         /* Calculate score for this window.  The smaller the better. */
 243         score = distance + offset;
 244
 245         /* windows more than 45 degrees off the direction are
 246          * heavily penalized and will only be chosen if nothing
 247          * else within a million pixels */
 248         if (offset > distance)
 249             score += 1000000;
 250
 251         if (best_score == -1 || score < best_score) {
 252             best_client = cur;
 253             best_score = score;
 254         }
 255     }
 256
 257     return best_client;
 258 }
 259
 260 ObClient* focus_directional_cycle(ObDirection dir, gboolean dock_windows,
 261                                   gboolean desktop_windows,
 262                                   gboolean interactive,
 263                                   gboolean showbar, gboolean dialog,
 264                                   gboolean done, gboolean cancel)
 265 {
 266     static ObClient *first = NULL;
 267     ObClient *ft = NULL;
 268     ObClient *ret = NULL;
 269
 270     if (cancel) {
 271         focus_cycle_target = NULL;
 272         goto done_cycle;
 273     } else if (done && interactive)
 274         goto done_cycle;
 275
 276     if (!focus_order)
 277         goto done_cycle;
 278
 279     if (focus_cycle_target == NULL) {
 280         focus_cycle_iconic_windows = FALSE;
 281         focus_cycle_all_desktops = FALSE;
 282         focus_cycle_dock_windows = dock_windows;
 283         focus_cycle_desktop_windows = desktop_windows;
 284     }
 285
 286     if (!first) first = focus_client;
 287
 288     if (focus_cycle_target)
 289         ft = focus_find_directional(focus_cycle_target, dir, dock_windows,
 290                                     desktop_windows);
 291     else if (first)
 292         ft = focus_find_directional(first, dir, dock_windows, desktop_windows);
 293     else {
 294         GList *it;
 295
 296         for (it = focus_order; it; it = g_list_next(it))
 297             if (focus_valid_target(it->data, TRUE,
 298                                    focus_cycle_iconic_windows,
 299                                    focus_cycle_all_desktops,
 300                                    focus_cycle_dock_windows,
 301                                    focus_cycle_desktop_windows, FALSE))
 302                 ft = it->data;
 303     }
 304
 305     if (ft && ft != focus_cycle_target) {/* prevents flicker */
 306         focus_cycle_target = ft;
 307         if (!interactive)
 308             goto done_cycle;
 309         focus_cycle_draw_indicator(showbar ? ft : NULL);
 310     }
 311     if (focus_cycle_target && dialog)
 312         /* same arguments as focus_target_valid */
 313         focus_cycle_popup_single_show(focus_cycle_target,
 314                                       focus_cycle_iconic_windows,
 315                                       focus_cycle_all_desktops,
 316                                       focus_cycle_dock_windows,
 317                                       focus_cycle_desktop_windows);
 318     return focus_cycle_target;
 319
 320 done_cycle:
 321     if (done && !cancel) ret = focus_cycle_target;
 322
 323     first = NULL;
 324     focus_cycle_target = NULL;
 325
 326     focus_cycle_draw_indicator(NULL);
 327     focus_cycle_popup_single_hide();
 328
 329     return ret;
 330 }