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 "popup.h"
  28 #include "debug.h"
  29 #include "group.h"
  30
  31 #include <X11/Xlib.h>
  32 #include <glib.h>
  33
  34 #define FOCUS_CYCLE_ICON_SIZE 48
  35
  36 struct _ObFocusCyclePopup
  37 {
  38     ObWindow obwin;
  39     Window bg;
  40
  41     Window text;
  42
  43     RrAppearance *a_bg;
  44     RrAppearance *a_text;
  45     gint textw;
  46     gint h;
  47     gint minw;
  48     gint maxw;
  49     gboolean mapped;
  50 };
  51
  52 ObClient     *focus_cycle_target = NULL;
  53
  54 static ObIconPopup  *focus_cycle_popup;
  55
  56 static void      focus_cycle_destroy_notify (ObClient *client, gpointer data);
  57 static gboolean  focus_target_valid         (ObClient *ft,
  58                                              gboolean all_desktops,
  59                                              gboolean dock_windows,
  60                                              gboolean desktop_windows);
  61 static gboolean  focus_target_has_siblings  (ObClient *ft,
  62                                              gboolean all_desktops);
  63 static gchar    *popup_get_name             (ObClient *c,
  64                                              ObClient **nametarget);
  65 static void      popup_cycle                (ObClient *c,
  66                                              gboolean show,
  67                                              gboolean all_desktops,
  68                                              gboolean dock_windows,
  69                                              gboolean desktop_windows);
  70 static ObClient *focus_find_directional    (ObClient *c,
  71                                             ObDirection dir,
  72                                             gboolean dock_windows,
  73                                             gboolean desktop_windows);
  74 static ObClient *focus_find_directional    (ObClient *c,
  75                                             ObDirection dir,
  76                                             gboolean dock_windows,
  77                                             gboolean desktop_windows);
  78
  79 void focus_cycle_startup(gboolean reconfig)
  80 {
  81     focus_cycle_popup = icon_popup_new(TRUE);
  82
  83     if (!reconfig)
  84         client_add_destroy_notify(focus_cycle_destroy_notify, NULL);
  85 }
  86
  87 void focus_cycle_shutdown(gboolean reconfig)
  88 {
  89     icon_popup_free(focus_cycle_popup);
  90
  91     if (!reconfig)
  92         client_remove_destroy_notify(focus_cycle_destroy_notify);
  93 }
  94
  95 void focus_cycle_stop()
  96 {
  97     if (focus_cycle_target)
  98         focus_cycle(TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE);
  99 }
 100
 101
 102 static gchar *popup_get_name(ObClient *c, ObClient **nametarget)
 103 {
 104     ObClient *p;
 105     gchar *title = NULL;
 106     const gchar *desk = NULL;
 107     gchar *ret;
 108
 109     /* find our highest direct parent, including non-normal windows */
 110     for (p = c; p->transient_for && p->transient_for != OB_TRAN_GROUP;
 111          p = p->transient_for);
 112
 113     if (c->desktop != DESKTOP_ALL && c->desktop != screen_desktop)
 114         desk = screen_desktop_names[c->desktop];
 115
 116     /* use the transient's parent's title/icon if we don't have one */
 117     if (p != c && !strcmp("", (c->iconic ? c->icon_title : c->title)))
 118         title = g_strdup(p->iconic ? p->icon_title : p->title);
 119
 120     if (title == NULL)
 121         title = g_strdup(c->iconic ? c->icon_title : c->title);
 122
 123     if (desk)
 124         ret = g_strdup_printf("%s [%s]", title, desk);
 125     else {
 126         ret = title;
 127         title = NULL;
 128     }
 129     g_free(title);
 130
 131     /* set this only if we're returning true and they asked for it */
 132     if (ret && nametarget) *nametarget = p;
 133     return ret;
 134 }
 135
 136 static void popup_cycle(ObClient *c, gboolean show,
 137                         gboolean all_desktops, gboolean dock_windows,
 138                         gboolean desktop_windows)
 139 {
 140     gchar *showtext = NULL;
 141     ObClient *showtarget;
 142
 143     if (!show) {
 144         icon_popup_hide(focus_cycle_popup);
 145         return;
 146     }
 147
 148     /* do this stuff only when the dialog is first showing */
 149     if (!focus_cycle_popup->popup->mapped &&
 150         !focus_cycle_popup->popup->delay_mapped)
 151     {
 152         Rect *a;
 153         gchar **names;
 154         GList *targets = NULL, *it;
 155         gint n = 0, i;
 156
 157         /* position the popup */
 158         a = screen_physical_area_monitor(0);
 159         icon_popup_position(focus_cycle_popup, CenterGravity,
 160                             a->x + a->width / 2, a->y + a->height / 2);
 161         icon_popup_height(focus_cycle_popup, POPUP_HEIGHT);
 162         icon_popup_min_width(focus_cycle_popup, POPUP_WIDTH);
 163         icon_popup_max_width(focus_cycle_popup,
 164                              MAX(a->width/3, POPUP_WIDTH));
 165
 166
 167         /* make its width to be the width of all the possible titles */
 168
 169         /* build a list of all the valid focus targets */
 170         for (it = focus_order; it; it = g_list_next(it)) {
 171             ObClient *ft = it->data;
 172             if (focus_target_valid(ft, all_desktops, dock_windows
 173                                    , desktop_windows))
 174             {
 175                 targets = g_list_prepend(targets, ft);
 176                 ++n;
 177             }
 178         }
 179         /* make it null terminated so we can use g_strfreev */
 180         names = g_new(char*, n+1);
 181         for (it = targets, i = 0; it; it = g_list_next(it), ++i) {
 182             ObClient *ft = it->data, *t;
 183             names[i] = popup_get_name(ft, &t);
 184
 185             /* little optimization.. save this text and client, so we dont
 186                have to get it again */
 187             if (ft == c) {
 188                 showtext = g_strdup(names[i]);
 189                 showtarget = t;
 190             }
 191         }
 192         names[n] = NULL;
 193
 194         icon_popup_text_width_to_strings(focus_cycle_popup, names, n);
 195         g_strfreev(names);
 196     }
 197
 198
 199     if (!showtext) showtext = popup_get_name(c, &showtarget);
 200     icon_popup_show(focus_cycle_popup, showtext,
 201                     client_icon(showtarget, 48, 48));
 202     g_free(showtext);
 203 }
 204
 205 static void focus_cycle_destroy_notify(ObClient *client, gpointer data)
 206 {
 207     /* end cycling if the target disappears. CurrentTime is fine, time won't
 208        be used
 209     */
 210     if (focus_cycle_target == client)
 211         focus_cycle(TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE);
 212 }
 213
 214 /*! Returns if a focus target has valid group siblings that can be cycled
 215   to in its place */
 216 static gboolean focus_target_has_siblings(ObClient *ft, gboolean all_desktops)
 217
 218 {
 219     GSList *it;
 220
 221     if (!ft->group) return FALSE;
 222
 223     for (it = ft->group->members; it; it = g_slist_next(it)) {
 224         ObClient *c = it->data;
 225         /* check that it's not a helper window to avoid infinite recursion */
 226         if (c != ft && !client_helper(c) &&
 227             focus_target_valid(c, all_desktops, FALSE, FALSE))
 228         {
 229             return TRUE;
 230         }
 231     }
 232     return FALSE;
 233 }
 234
 235 /*! @param allow_helpers This is used for calling itself recursively while
 236                          checking helper windows. */
 237 static gboolean focus_target_valid(ObClient *ft,
 238                                    gboolean all_desktops,
 239                                    gboolean dock_windows,
 240                                    gboolean desktop_windows)
 241 {
 242     gboolean ok = FALSE;
 243
 244     /* it's on this desktop unless you want all desktops.
 245
 246        do this check first because it will usually filter out the most
 247        windows */
 248     ok = (all_desktops || ft->desktop == screen_desktop ||
 249           ft->desktop == DESKTOP_ALL);
 250
 251     /* the window can receive focus somehow */
 252     ok = ok && (ft->can_focus || ft->focus_notify);
 253
 254     /* it's the right type of window */
 255     if (dock_windows || desktop_windows)
 256         ok = ok && ((dock_windows && ft->type == OB_CLIENT_TYPE_DOCK) ||
 257                     (desktop_windows && ft->type == OB_CLIENT_TYPE_DESKTOP));
 258     else
 259         /* normal non-helper windows are valid targets */
 260         ok = ok &&
 261             ((client_normal(ft) && !client_helper(ft))
 262              ||
 263              /* helper windows are valid targets it... */
 264              (client_helper(ft) &&
 265               /* ...a window in its group already has focus ... */
 266               ((focus_client && ft->group == focus_client->group) ||
 267                /* ... or if there are no other windows in its group
 268                   that can be cycled to instead */
 269                !focus_target_has_siblings(ft, all_desktops))));
 270
 271     /* it's not set to skip the taskbar (unless it is a type that would be
 272        expected to set this hint */
 273     ok = ok && ((ft->type == OB_CLIENT_TYPE_DOCK ||
 274                  ft->type == OB_CLIENT_TYPE_DESKTOP ||
 275                  ft->type == OB_CLIENT_TYPE_TOOLBAR ||
 276                  ft->type == OB_CLIENT_TYPE_MENU ||
 277                  ft->type == OB_CLIENT_TYPE_UTILITY) ||
 278                 !ft->skip_taskbar);
 279
 280     /* it's not going to just send fous off somewhere else (modal window) */
 281     ok = ok && ft == client_focus_target(ft);
 282
 283     return ok;
 284 }
 285
 286 void focus_cycle(gboolean forward, gboolean all_desktops,
 287                  gboolean dock_windows, gboolean desktop_windows,
 288                  gboolean linear, gboolean interactive,
 289                  gboolean dialog, gboolean done, gboolean cancel)
 290 {
 291     static ObClient *first = NULL;
 292     static ObClient *t = NULL;
 293     static GList *order = NULL;
 294     GList *it, *start, *list;
 295     ObClient *ft = NULL;
 296
 297     if (interactive) {
 298         if (cancel) {
 299             focus_cycle_target = NULL;
 300             goto done_cycle;
 301         } else if (done)
 302             goto done_cycle;
 303
 304         if (!focus_order)
 305             goto done_cycle;
 306
 307         if (!first) first = focus_client;
 308
 309         if (linear) list = client_list;
 310         else        list = focus_order;
 311     } else {
 312         if (!focus_order)
 313             goto done_cycle;
 314         list = client_list;
 315     }
 316     if (!focus_cycle_target) focus_cycle_target = focus_client;
 317
 318     start = it = g_list_find(list, focus_cycle_target);
 319     if (!start) /* switched desktops or something? */
 320         start = it = forward ? g_list_last(list) : g_list_first(list);
 321     if (!start) goto done_cycle;
 322
 323     do {
 324         if (forward) {
 325             it = it->next;
 326             if (it == NULL) it = g_list_first(list);
 327         } else {
 328             it = it->prev;
 329             if (it == NULL) it = g_list_last(list);
 330         }
 331         ft = it->data;
 332         if (focus_target_valid(ft, all_desktops, dock_windows,
 333                                desktop_windows))
 334         {
 335             if (interactive) {
 336                 if (ft != focus_cycle_target) { /* prevents flicker */
 337                     focus_cycle_target = ft;
 338                     focus_cycle_draw_indicator(ft);
 339                 }
 340                 /* same arguments as focus_target_valid */
 341                 popup_cycle(ft, dialog, all_desktops, dock_windows,
 342                             desktop_windows);
 343                 return;
 344             } else if (ft != focus_cycle_target) {
 345                 focus_cycle_target = ft;
 346                 done = TRUE;
 347                 break;
 348             }
 349         }
 350     } while (it != start);
 351
 352 done_cycle:
 353     if (done && focus_cycle_target)
 354         client_activate(focus_cycle_target, FALSE, TRUE);
 355
 356     t = NULL;
 357     first = NULL;
 358     focus_cycle_target = NULL;
 359     g_list_free(order);
 360     order = NULL;
 361
 362     if (interactive) {
 363         focus_cycle_draw_indicator(NULL);
 364         popup_cycle(ft, FALSE, FALSE, FALSE, FALSE);
 365     }
 366
 367     return;
 368 }
 369
 370 /* this be mostly ripped from fvwm */
 371 static ObClient *focus_find_directional(ObClient *c, ObDirection dir,
 372                                         gboolean dock_windows,
 373                                         gboolean desktop_windows)
 374 {
 375     gint my_cx, my_cy, his_cx, his_cy;
 376     gint offset = 0;
 377     gint distance = 0;
 378     gint score, best_score;
 379     ObClient *best_client, *cur;
 380     GList *it;
 381
 382     if(!client_list)
 383         return NULL;
 384
 385     /* first, find the centre coords of the currently focused window */
 386     my_cx = c->frame->area.x + c->frame->area.width / 2;
 387     my_cy = c->frame->area.y + c->frame->area.height / 2;
 388
 389     best_score = -1;
 390     best_client = NULL;
 391
 392     for(it = g_list_first(client_list); it; it = g_list_next(it)) {
 393         cur = it->data;
 394
 395         /* the currently selected window isn't interesting */
 396         if(cur == c)
 397             continue;
 398         if (cur->type == OB_CLIENT_TYPE_DOCK && !dock_windows)
 399             continue;
 400         if (cur->type == OB_CLIENT_TYPE_DESKTOP && !desktop_windows)
 401             continue;
 402         if (!client_normal(cur) &&
 403             cur->type != OB_CLIENT_TYPE_DOCK &&
 404             cur->type != OB_CLIENT_TYPE_DESKTOP)
 405             continue;
 406         /* using c->desktop instead of screen_desktop doesn't work if the
 407          * current window was omnipresent, hope this doesn't have any other
 408          * side effects */
 409         if(screen_desktop != cur->desktop && cur->desktop != DESKTOP_ALL)
 410             continue;
 411         if(cur->iconic)
 412             continue;
 413         if(!(client_focus_target(cur) == cur &&
 414              client_can_focus(cur)))
 415             continue;
 416
 417         /* find the centre coords of this window, from the
 418          * currently focused window's point of view */
 419         his_cx = (cur->frame->area.x - my_cx)
 420             + cur->frame->area.width / 2;
 421         his_cy = (cur->frame->area.y - my_cy)
 422             + cur->frame->area.height / 2;
 423
 424         if(dir == OB_DIRECTION_NORTHEAST || dir == OB_DIRECTION_SOUTHEAST ||
 425            dir == OB_DIRECTION_SOUTHWEST || dir == OB_DIRECTION_NORTHWEST) {
 426             gint tx;
 427             /* Rotate the diagonals 45 degrees counterclockwise.
 428              * To do this, multiply the matrix /+h +h\ with the
 429              * vector (x y).                   \-h +h/
 430              * h = sqrt(0.5). We can set h := 1 since absolute
 431              * distance doesn't matter here. */
 432             tx = his_cx + his_cy;
 433             his_cy = -his_cx + his_cy;
 434             his_cx = tx;
 435         }
 436
 437         switch(dir) {
 438         case OB_DIRECTION_NORTH:
 439         case OB_DIRECTION_SOUTH:
 440         case OB_DIRECTION_NORTHEAST:
 441         case OB_DIRECTION_SOUTHWEST:
 442             offset = (his_cx < 0) ? -his_cx : his_cx;
 443             distance = ((dir == OB_DIRECTION_NORTH ||
 444                          dir == OB_DIRECTION_NORTHEAST) ?
 445                         -his_cy : his_cy);
 446             break;
 447         case OB_DIRECTION_EAST:
 448         case OB_DIRECTION_WEST:
 449         case OB_DIRECTION_SOUTHEAST:
 450         case OB_DIRECTION_NORTHWEST:
 451             offset = (his_cy < 0) ? -his_cy : his_cy;
 452             distance = ((dir == OB_DIRECTION_WEST ||
 453                          dir == OB_DIRECTION_NORTHWEST) ?
 454                         -his_cx : his_cx);
 455             break;
 456         }
 457
 458         /* the target must be in the requested direction */
 459         if(distance <= 0)
 460             continue;
 461
 462         /* Calculate score for this window.  The smaller the better. */
 463         score = distance + offset;
 464
 465         /* windows more than 45 degrees off the direction are
 466          * heavily penalized and will only be chosen if nothing
 467          * else within a million pixels */
 468         if(offset > distance)
 469             score += 1000000;
 470
 471         if(best_score == -1 || score < best_score)
 472             best_client = cur,
 473                 best_score = score;
 474     }
 475
 476     return best_client;
 477 }
 478
 479 void focus_directional_cycle(ObDirection dir, gboolean dock_windows,
 480                              gboolean desktop_windows, gboolean interactive,
 481                              gboolean dialog, gboolean done, gboolean cancel)
 482 {
 483     static ObClient *first = NULL;
 484     ObClient *ft = NULL;
 485
 486     if (!interactive)
 487         return;
 488
 489     if (cancel) {
 490         focus_cycle_target = NULL;
 491         goto done_cycle;
 492     } else if (done)
 493         goto done_cycle;
 494
 495     if (!focus_order)
 496         goto done_cycle;
 497
 498     if (!first) first = focus_client;
 499     if (!focus_cycle_target) focus_cycle_target = focus_client;
 500
 501     if (focus_cycle_target)
 502         ft = focus_find_directional(focus_cycle_target, dir, dock_windows,
 503                                     desktop_windows);
 504     else {
 505         GList *it;
 506
 507         for (it = focus_order; it; it = g_list_next(it))
 508             if (focus_target_valid(it->data, FALSE, dock_windows,
 509                                    desktop_windows))
 510                 ft = it->data;
 511     }
 512
 513     if (ft) {
 514         if (ft != focus_cycle_target) {/* prevents flicker */
 515             focus_cycle_target = ft;
 516             focus_cycle_draw_indicator(ft);
 517         }
 518     }
 519     if (focus_cycle_target) {
 520         /* same arguments as focus_target_valid */
 521         popup_cycle(focus_cycle_target, dialog, FALSE, dock_windows,
 522                     desktop_windows);
 523         if (dialog)
 524             return;
 525     }
 526
 527
 528 done_cycle:
 529     if (done && focus_cycle_target)
 530         client_activate(focus_cycle_target, FALSE, TRUE);
 531
 532     first = NULL;
 533     focus_cycle_target = NULL;
 534
 535     focus_cycle_draw_indicator(NULL);
 536     popup_cycle(ft, FALSE, FALSE, FALSE, FALSE);
 537
 538     return;
 539 }
 540
 541 void focus_order_add_new(ObClient *c)
 542 {
 543     if (c->iconic)
 544         focus_order_to_top(c);
 545     else {
 546         g_assert(!g_list_find(focus_order, c));
 547         /* if there are any iconic windows, put this above them in the order,
 548            but if there are not, then put it under the currently focused one */
 549         if (focus_order && ((ObClient*)focus_order->data)->iconic)
 550             focus_order = g_list_insert(focus_order, c, 0);
 551         else
 552             focus_order = g_list_insert(focus_order, c, 1);
 553     }
 554 }
 555