git.sur5r.net Git - i3/i3/blob - src/commands.c

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * © 2009 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  */
  11 #include <stdbool.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <assert.h>
  15 #include <unistd.h>
  16 #include <string.h>
  17
  18 #include <xcb/xcb.h>
  19
  20 #include "util.h"
  21 #include "data.h"
  22 #include "table.h"
  23 #include "layout.h"
  24 #include "i3.h"
  25 #include "xinerama.h"
  26 #include "client.h"
  27 #include "floating.h"
  28 #include "xcb.h"
  29 #include "config.h"
  30 #include "workspace.h"
  31 #include "commands.h"
  32 #include "resize.h"
  33 #include "log.h"
  34
  35 bool focus_window_in_container(xcb_connection_t *conn, Container *container, direction_t direction) {
  36         /* If this container is empty, we’re done */
  37         if (container->currently_focused == NULL)
  38                 return false;
  39
  40         /* Get the previous/next client or wrap around */
  41         Client *candidate = NULL;
  42         if (direction == D_UP) {
  43                 if ((candidate = CIRCLEQ_PREV_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  44                         candidate = CIRCLEQ_LAST(&(container->clients));
  45         }
  46         else if (direction == D_DOWN) {
  47                 if ((candidate = CIRCLEQ_NEXT_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  48                         candidate = CIRCLEQ_FIRST(&(container->clients));
  49         } else ELOG("Direction not implemented!\n");
  50
  51         /* If we could not switch, the container contains exactly one client. We return false */
  52         if (candidate == container->currently_focused)
  53                 return false;
  54
  55         /* Set focus */
  56         set_focus(conn, candidate, true);
  57
  58         return true;
  59 }
  60
  61 typedef enum { THING_WINDOW, THING_CONTAINER, THING_SCREEN } thing_t;
  62
  63 static void jump_to_mark(xcb_connection_t *conn, const char *mark) {
  64         Client *current;
  65         LOG("Jumping to \"%s\"\n", mark);
  66
  67         Workspace *ws;
  68         TAILQ_FOREACH(ws, workspaces, workspaces)
  69                 SLIST_FOREACH(current, &(ws->focus_stack), focus_clients) {
  70                         if (current->mark == NULL || strcmp(current->mark, mark) != 0)
  71                                 continue;
  72
  73                         workspace_show(conn, current->workspace->num + 1);
  74                         set_focus(conn, current, true);
  75                         return;
  76                 }
  77
  78         ELOG("No window with this mark found\n");
  79 }
  80
  81 static void focus_thing(xcb_connection_t *conn, direction_t direction, thing_t thing) {
  82         DLOG("focusing direction %d\n", direction);
  83
  84         int new_row = current_row,
  85             new_col = current_col;
  86         Container *container = CUR_CELL;
  87         Workspace *t_ws = c_ws;
  88
  89         /* Makes sure new_col and new_row are within bounds of the new workspace */
  90         void check_colrow_boundaries() {
  91                 if (new_col >= t_ws->cols)
  92                         new_col = (t_ws->cols - 1);
  93                 if (new_row >= t_ws->rows)
  94                         new_row = (t_ws->rows - 1);
  95         }
  96
  97         /* There always is a container. If not, current_col or current_row is wrong */
  98         assert(container != NULL);
  99
 100         if (container->workspace->fullscreen_client != NULL) {
 101                 LOG("You're in fullscreen mode. Won't switch focus\n");
 102                 return;
 103         }
 104
 105         /* For focusing screens, situation is different: we get the rect
 106          * of the current screen, then get the screen which is on its
 107          * right/left/bottom/top and just switch to the workspace on
 108          * the target screen. */
 109         if (thing == THING_SCREEN) {
 110                 i3Screen *cs = c_ws->screen;
 111                 assert(cs != NULL);
 112                 Rect bounds = cs->rect;
 113
 114                 if (direction == D_RIGHT)
 115                         bounds.x += bounds.width;
 116                 else if (direction == D_LEFT)
 117                         bounds.x -= bounds.width;
 118                 else if (direction == D_UP)
 119                         bounds.y -= bounds.height;
 120                 else bounds.y += bounds.height;
 121
 122                 i3Screen *target = get_screen_containing(bounds.x, bounds.y);
 123                 if (target == NULL) {
 124                         DLOG("Target screen NULL\n");
 125                         /* Wrap around if the target screen is out of bounds */
 126                         if (direction == D_RIGHT)
 127                                 target = get_screen_most(D_LEFT, cs);
 128                         else if (direction == D_LEFT)
 129                                 target = get_screen_most(D_RIGHT, cs);
 130                         else if (direction == D_UP)
 131                                 target = get_screen_most(D_DOWN, cs);
 132                         else target = get_screen_most(D_UP, cs);
 133                 }
 134
 135                 DLOG("Switching to ws %d\n", target->current_workspace + 1);
 136                 workspace_show(conn, target->current_workspace->num + 1);
 137                 return;
 138         }
 139
 140         /* TODO: for horizontal default layout, this has to be expanded to LEFT/RIGHT */
 141         if (direction == D_UP || direction == D_DOWN) {
 142                 if (thing == THING_WINDOW)
 143                         /* Let’s see if we can perform up/down focus in the current container */
 144                         if (focus_window_in_container(conn, container, direction))
 145                                 return;
 146
 147                 if (direction == D_DOWN && cell_exists(current_col, current_row+1))
 148                         new_row = current_row + t_ws->table[current_col][current_row]->rowspan;
 149                 else if (direction == D_UP && cell_exists(current_col, current_row-1)) {
 150                         /* Set new_row as a sane default, but it may get overwritten in a second */
 151                         new_row--;
 152
 153                         /* Search from the top to correctly handle rowspanned containers */
 154                         for (int rows = 0; rows < current_row; rows += t_ws->table[current_col][rows]->rowspan) {
 155                                 if (new_row > (rows + (t_ws->table[current_col][rows]->rowspan - 1)))
 156                                         continue;
 157
 158                                 new_row = rows;
 159                                 break;
 160                         }
 161                 } else {
 162                         /* Let’s see if there is a screen down/up there to which we can switch */
 163                         DLOG("container is at %d with height %d\n", container->y, container->height);
 164                         i3Screen *screen;
 165                         int destination_y = (direction == D_UP ? (container->y - 1) : (container->y + container->height + 1));
 166                         if ((screen = get_screen_containing(container->x, destination_y)) == NULL) {
 167                                 DLOG("Wrapping screen around vertically\n");
 168                                 /* No screen found? Then wrap */
 169                                 screen = get_screen_most((direction == D_UP ? D_DOWN : D_UP), container->workspace->screen);
 170                         }
 171                         t_ws = screen->current_workspace;
 172                         new_row = (direction == D_UP ? (t_ws->rows - 1) : 0);
 173                 }
 174
 175                 check_colrow_boundaries();
 176
 177                 DLOG("new_col = %d, new_row = %d\n", new_col, new_row);
 178                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
 179                         DLOG("Cell empty, checking for colspanned client above...\n");
 180                         for (int cols = 0; cols < new_col; cols += t_ws->table[cols][new_row]->colspan) {
 181                                 if (new_col > (cols + (t_ws->table[cols][new_row]->colspan - 1)))
 182                                         continue;
 183
 184                                 new_col = cols;
 185                                 break;
 186                         }
 187                         DLOG("Fixed it to new col %d\n", new_col);
 188                 }
 189         } else if (direction == D_LEFT || direction == D_RIGHT) {
 190                 if (direction == D_RIGHT && cell_exists(current_col+1, current_row))
 191                         new_col = current_col + t_ws->table[current_col][current_row]->colspan;
 192                 else if (direction == D_LEFT && cell_exists(current_col-1, current_row)) {
 193                         /* Set new_col as a sane default, but it may get overwritten in a second */
 194                         new_col--;
 195
 196                         /* Search from the left to correctly handle colspanned containers */
 197                         for (int cols = 0; cols < current_col; cols += t_ws->table[cols][current_row]->colspan) {
 198                                 if (new_col > (cols + (t_ws->table[cols][current_row]->colspan - 1)))
 199                                         continue;
 200
 201                                 new_col = cols;
 202                                 break;
 203                         }
 204                 } else {
 205                         /* Let’s see if there is a screen left/right here to which we can switch */
 206                         DLOG("container is at %d with width %d\n", container->x, container->width);
 207                         i3Screen *screen;
 208                         int destination_x = (direction == D_LEFT ? (container->x - 1) : (container->x + container->width + 1));
 209                         if ((screen = get_screen_containing(destination_x, container->y)) == NULL) {
 210                                 DLOG("Wrapping screen around horizontally\n");
 211                                 screen = get_screen_most((direction == D_LEFT ? D_RIGHT : D_LEFT), container->workspace->screen);
 212                         }
 213                         t_ws = screen->current_workspace;
 214                         new_col = (direction == D_LEFT ? (t_ws->cols - 1) : 0);
 215                 }
 216
 217                 check_colrow_boundaries();
 218
 219                 DLOG("new_col = %d, new_row = %d\n", new_col, new_row);
 220                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
 221                         DLOG("Cell empty, checking for rowspanned client above...\n");
 222                         for (int rows = 0; rows < new_row; rows += t_ws->table[new_col][rows]->rowspan) {
 223                                 if (new_row > (rows + (t_ws->table[new_col][rows]->rowspan - 1)))
 224                                         continue;
 225
 226                                 new_row = rows;
 227                                 break;
 228                         }
 229                         DLOG("Fixed it to new row %d\n", new_row);
 230                 }
 231         } else {
 232                 ELOG("direction unhandled\n");
 233                 return;
 234         }
 235
 236         check_colrow_boundaries();
 237
 238         if (t_ws->table[new_col][new_row]->currently_focused != NULL)
 239                 set_focus(conn, t_ws->table[new_col][new_row]->currently_focused, true);
 240 }
 241
 242 /*
 243  * Tries to move the window inside its current container.
 244  *
 245  * Returns true if the window could be moved, false otherwise.
 246  *
 247  */
 248 static bool move_current_window_in_container(xcb_connection_t *conn, Client *client,
 249                 direction_t direction) {
 250         assert(client->container != NULL);
 251
 252         Client *other = (direction == D_UP ? CIRCLEQ_PREV(client, clients) :
 253                                              CIRCLEQ_NEXT(client, clients));
 254
 255         if (other == CIRCLEQ_END(&(client->container->clients)))
 256                 return false;
 257
 258         DLOG("i can do that\n");
 259         /* We can move the client inside its current container */
 260         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 261         if (direction == D_UP)
 262                 CIRCLEQ_INSERT_BEFORE(&(client->container->clients), other, client, clients);
 263         else CIRCLEQ_INSERT_AFTER(&(client->container->clients), other, client, clients);
 264         render_layout(conn);
 265         return true;
 266 }
 267
 268 /*
 269  * Moves the current window or whole container to the given direction, creating a column/row if
 270  * necessary.
 271  *
 272  */
 273 static void move_current_window(xcb_connection_t *conn, direction_t direction) {
 274         LOG("moving window to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 275                                             (direction == D_LEFT ? "left" : "right"))));
 276         /* Get current window */
 277         Container *container = CUR_CELL,
 278                   *new = NULL;
 279
 280         /* There has to be a container, see focus_window() */
 281         assert(container != NULL);
 282
 283         /* If there is no window or the dock window is focused, we’re done */
 284         if (container->currently_focused == NULL ||
 285             container->currently_focused->dock)
 286                 return;
 287
 288         /* As soon as the client is moved away, the last focused client in the old
 289          * container needs to get focus, if any. Therefore, we save it here. */
 290         Client *current_client = container->currently_focused;
 291         Client *to_focus = get_last_focused_client(conn, container, current_client);
 292
 293         if (to_focus == NULL) {
 294                 to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 295                 if (to_focus == NULL)
 296                         to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 297         }
 298
 299         switch (direction) {
 300                 case D_LEFT:
 301                         /* If we’re at the left-most position, move the rest of the table right */
 302                         if (current_col == 0) {
 303                                 expand_table_cols_at_head(c_ws);
 304                                 new = CUR_CELL;
 305                         } else
 306                                 new = CUR_TABLE[--current_col][current_row];
 307                         break;
 308                 case D_RIGHT:
 309                         if (current_col == (c_ws->cols-1))
 310                                 expand_table_cols(c_ws);
 311
 312                         new = CUR_TABLE[++current_col][current_row];
 313                         break;
 314                 case D_UP:
 315                         if (move_current_window_in_container(conn, current_client, D_UP))
 316                                 return;
 317
 318                         /* if we’re at the up-most position, move the rest of the table down */
 319                         if (current_row == 0) {
 320                                 expand_table_rows_at_head(c_ws);
 321                                 new = CUR_CELL;
 322                         } else
 323                                 new = CUR_TABLE[current_col][--current_row];
 324                         break;
 325                 case D_DOWN:
 326                         if (move_current_window_in_container(conn, current_client, D_DOWN))
 327                                 return;
 328
 329                         if (current_row == (c_ws->rows-1))
 330                                 expand_table_rows(c_ws);
 331
 332                         new = CUR_TABLE[current_col][++current_row];
 333                         break;
 334                 /* To make static analyzers happy: */
 335                 default:
 336                         return;
 337         }
 338
 339         /* Remove it from the old container and put it into the new one */
 340         client_remove_from_container(conn, current_client, container, true);
 341
 342         if (new->currently_focused != NULL)
 343                 CIRCLEQ_INSERT_AFTER(&(new->clients), new->currently_focused, current_client, clients);
 344         else CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
 345         SLIST_INSERT_HEAD(&(new->workspace->focus_stack), current_client, focus_clients);
 346
 347         /* Update data structures */
 348         current_client->container = new;
 349         current_client->workspace = new->workspace;
 350         container->currently_focused = to_focus;
 351         new->currently_focused = current_client;
 352
 353         Workspace *workspace = container->workspace;
 354
 355         /* delete all empty columns/rows */
 356         cleanup_table(conn, workspace);
 357
 358         /* Fix colspan/rowspan if it’d overlap */
 359         fix_colrowspan(conn, workspace);
 360
 361         render_workspace(conn, workspace->screen, workspace);
 362         xcb_flush(conn);
 363
 364         set_focus(conn, current_client, true);
 365 }
 366
 367 static void move_current_container(xcb_connection_t *conn, direction_t direction) {
 368         LOG("moving container to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 369                                             (direction == D_LEFT ? "left" : "right"))));
 370         /* Get current window */
 371         Container *container = CUR_CELL,
 372                   *new = NULL;
 373
 374         Container **old = &CUR_CELL;
 375
 376         /* There has to be a container, see focus_window() */
 377         assert(container != NULL);
 378
 379         switch (direction) {
 380                 case D_LEFT:
 381                         /* If we’re at the left-most position, move the rest of the table right */
 382                         if (current_col == 0) {
 383                                 expand_table_cols_at_head(c_ws);
 384                                 new = CUR_CELL;
 385                                 old = &CUR_TABLE[current_col+1][current_row];
 386                         } else
 387                                 new = CUR_TABLE[--current_col][current_row];
 388                         break;
 389                 case D_RIGHT:
 390                         if (current_col == (c_ws->cols-1))
 391                                 expand_table_cols(c_ws);
 392
 393                         new = CUR_TABLE[++current_col][current_row];
 394                         break;
 395                 case D_UP:
 396                         /* if we’re at the up-most position, move the rest of the table down */
 397                         if (current_row == 0) {
 398                                 expand_table_rows_at_head(c_ws);
 399                                 new = CUR_CELL;
 400                                 old = &CUR_TABLE[current_col][current_row+1];
 401                         } else
 402                                 new = CUR_TABLE[current_col][--current_row];
 403                         break;
 404                 case D_DOWN:
 405                         if (current_row == (c_ws->rows-1))
 406                                 expand_table_rows(c_ws);
 407
 408                         new = CUR_TABLE[current_col][++current_row];
 409                         break;
 410                 /* To make static analyzers happy: */
 411                 default:
 412                         return;
 413         }
 414
 415         DLOG("old = %d,%d and new = %d,%d\n", container->col, container->row, new->col, new->row);
 416
 417         /* Swap the containers */
 418         int col = new->col;
 419         int row = new->row;
 420
 421         *old = new;
 422         new->col = container->col;
 423         new->row = container->row;
 424
 425         CUR_CELL = container;
 426         container->col = col;
 427         container->row = row;
 428
 429         Workspace *workspace = container->workspace;
 430
 431         /* delete all empty columns/rows */
 432         cleanup_table(conn, workspace);
 433
 434         /* Fix colspan/rowspan if it’d overlap */
 435         fix_colrowspan(conn, workspace);
 436
 437         render_layout(conn);
 438 }
 439
 440 /*
 441  * "Snaps" the current container (not possible for windows, because it works at table base)
 442  * to the given direction, that is, adjusts cellspan/rowspan
 443  *
 444  */
 445 static void snap_current_container(xcb_connection_t *conn, direction_t direction) {
 446         LOG("snapping container to direction %d\n", direction);
 447
 448         Container *container = CUR_CELL;
 449
 450         assert(container != NULL);
 451
 452         switch (direction) {
 453                 case D_LEFT:
 454                         /* Snap to the left is actually a move to the left and then a snap right */
 455                         if (!cell_exists(container->col - 1, container->row) ||
 456                             CUR_TABLE[container->col-1][container->row]->currently_focused != NULL) {
 457                                 ELOG("cannot snap to left - the cell is already used\n");
 458                                 return;
 459                         }
 460
 461                         move_current_window(conn, D_LEFT);
 462                         snap_current_container(conn, D_RIGHT);
 463                         return;
 464                 case D_RIGHT: {
 465                         /* Check if the cell is used */
 466                         int new_col = container->col + container->colspan;
 467                         for (int i = 0; i < container->rowspan; i++)
 468                                 if (!cell_exists(new_col, container->row + i) ||
 469                                     CUR_TABLE[new_col][container->row + i]->currently_focused != NULL) {
 470                                         ELOG("cannot snap to right - the cell is already used\n");
 471                                         return;
 472                                 }
 473
 474                         /* Check if there are other cells with rowspan, which are in our way.
 475                          * If so, reduce their rowspan. */
 476                         for (int i = container->row-1; i >= 0; i--) {
 477                                 DLOG("we got cell %d, %d with rowspan %d\n",
 478                                                 new_col, i, CUR_TABLE[new_col][i]->rowspan);
 479                                 while ((CUR_TABLE[new_col][i]->rowspan-1) >= (container->row - i))
 480                                         CUR_TABLE[new_col][i]->rowspan--;
 481                                 DLOG("new rowspan = %d\n", CUR_TABLE[new_col][i]->rowspan);
 482                         }
 483
 484                         container->colspan++;
 485                         break;
 486                 }
 487                 case D_UP:
 488                         if (!cell_exists(container->col, container->row - 1) ||
 489                             CUR_TABLE[container->col][container->row-1]->currently_focused != NULL) {
 490                                 ELOG("cannot snap to top - the cell is already used\n");
 491                                 return;
 492                         }
 493
 494                         move_current_window(conn, D_UP);
 495                         snap_current_container(conn, D_DOWN);
 496                         return;
 497                 case D_DOWN: {
 498                         DLOG("snapping down\n");
 499                         int new_row = container->row + container->rowspan;
 500                         for (int i = 0; i < container->colspan; i++)
 501                                 if (!cell_exists(container->col + i, new_row) ||
 502                                     CUR_TABLE[container->col + i][new_row]->currently_focused != NULL) {
 503                                         ELOG("cannot snap down - the cell is already used\n");
 504                                         return;
 505                                 }
 506
 507                         for (int i = container->col-1; i >= 0; i--) {
 508                                 DLOG("we got cell %d, %d with colspan %d\n",
 509                                                 i, new_row, CUR_TABLE[i][new_row]->colspan);
 510                                 while ((CUR_TABLE[i][new_row]->colspan-1) >= (container->col - i))
 511                                         CUR_TABLE[i][new_row]->colspan--;
 512                                 DLOG("new colspan = %d\n", CUR_TABLE[i][new_row]->colspan);
 513
 514                         }
 515
 516                         container->rowspan++;
 517                         break;
 518                 }
 519                 /* To make static analyzers happy: */
 520                 default:
 521                         return;
 522         }
 523
 524         render_layout(conn);
 525 }
 526
 527 static void move_floating_window_to_workspace(xcb_connection_t *conn, Client *client, int workspace) {
 528         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 529         Workspace *t_ws = workspace_get(workspace-1),
 530                   *old_ws = client->workspace;
 531
 532         LOG("moving floating\n");
 533
 534         workspace_initialize(t_ws, c_ws->screen);
 535
 536         /* Check if there is already a fullscreen client on the destination workspace and
 537          * stop moving if so. */
 538         if (client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 539                 ELOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 540                 return;
 541         }
 542
 543         floating_assign_to_workspace(client, t_ws);
 544
 545         /* If we’re moving it to an invisible screen, we need to unmap it */
 546         if (!workspace_is_visible(t_ws)) {
 547                 DLOG("This workspace is not visible, unmapping\n");
 548                 client_unmap(conn, client);
 549         } else {
 550                 /* If this is not the case, we move the window to a workspace
 551                  * which is on another screen, so we also need to adjust its
 552                  * coordinates. */
 553                 DLOG("before x = %d, y = %d\n", client->rect.x, client->rect.y);
 554                 uint32_t relative_x = client->rect.x - old_ws->rect.x,
 555                          relative_y = client->rect.y - old_ws->rect.y;
 556                 DLOG("rel_x = %d, rel_y = %d\n", relative_x, relative_y);
 557                 client->rect.x = t_ws->rect.x + relative_x;
 558                 client->rect.y = t_ws->rect.y + relative_y;
 559                 DLOG("after x = %d, y = %d\n", client->rect.x, client->rect.y);
 560                 reposition_client(conn, client);
 561                 xcb_flush(conn);
 562         }
 563
 564         DLOG("done\n");
 565
 566         render_layout(conn);
 567
 568         if (workspace_is_visible(t_ws))
 569                 set_focus(conn, client, true);
 570 }
 571
 572 /*
 573  * Moves the currently selected window to the given workspace
 574  *
 575  */
 576 static void move_current_window_to_workspace(xcb_connection_t *conn, int workspace) {
 577         LOG("Moving current window to workspace %d\n", workspace);
 578
 579         Container *container = CUR_CELL;
 580
 581         assert(container != NULL);
 582
 583         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 584         Workspace *t_ws = workspace_get(workspace-1);
 585
 586         Client *current_client = container->currently_focused;
 587         if (current_client == NULL) {
 588                 ELOG("No currently focused client in current container.\n");
 589                 return;
 590         }
 591         Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 592         if (to_focus == NULL)
 593                 to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 594
 595         workspace_initialize(t_ws, container->workspace->screen);
 596         /* Check if there is already a fullscreen client on the destination workspace and
 597          * stop moving if so. */
 598         if (current_client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 599                 ELOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 600                 return;
 601         }
 602
 603         Container *to_container = t_ws->table[t_ws->current_col][t_ws->current_row];
 604
 605         assert(to_container != NULL);
 606
 607         client_remove_from_container(conn, current_client, container, true);
 608         if (container->workspace->fullscreen_client == current_client)
 609                 container->workspace->fullscreen_client = NULL;
 610
 611         /* TODO: insert it to the correct position */
 612         CIRCLEQ_INSERT_TAIL(&(to_container->clients), current_client, clients);
 613
 614         SLIST_INSERT_HEAD(&(to_container->workspace->focus_stack), current_client, focus_clients);
 615         DLOG("Moved.\n");
 616
 617         current_client->container = to_container;
 618         current_client->workspace = to_container->workspace;
 619         container->currently_focused = to_focus;
 620         to_container->currently_focused = current_client;
 621
 622         /* If we’re moving it to an invisible screen, we need to unmap it */
 623         if (!workspace_is_visible(to_container->workspace)) {
 624                 DLOG("This workspace is not visible, unmapping\n");
 625                 client_unmap(conn, current_client);
 626         } else {
 627                 if (current_client->fullscreen) {
 628                         DLOG("Calling client_enter_fullscreen again\n");
 629                         client_enter_fullscreen(conn, current_client);
 630                 }
 631         }
 632
 633         /* delete all empty columns/rows */
 634         cleanup_table(conn, container->workspace);
 635
 636         render_layout(conn);
 637
 638         if (workspace_is_visible(to_container->workspace))
 639                 set_focus(conn, current_client, true);
 640 }
 641
 642 /*
 643  * Jumps to the given window class / title.
 644  * Title is matched using strstr, that is, matches if it appears anywhere
 645  * in the string. Regular expressions seem to be a bit overkill here. However,
 646  * if we need them for something else somewhen, we may introduce them here, too.
 647  *
 648  */
 649 static void jump_to_window(xcb_connection_t *conn, const char *arguments) {
 650         char *classtitle;
 651         Client *client;
 652
 653         /* The first character is a quote, this was checked before */
 654         classtitle = sstrdup(arguments+1);
 655         /* The last character is a quote, we just set it to NULL */
 656         classtitle[strlen(classtitle)-1] = '\0';
 657
 658         if ((client = get_matching_client(conn, classtitle, NULL)) == NULL) {
 659                 free(classtitle);
 660                 ELOG("No matching client found.\n");
 661                 return;
 662         }
 663
 664         free(classtitle);
 665         set_focus(conn, client, true);
 666 }
 667
 668 /*
 669  * Jump directly to the specified workspace, row and col.
 670  * Great for reaching windows that you always keep in the same spot (hello irssi, I'm looking at you)
 671  *
 672  */
 673 static void jump_to_container(xcb_connection_t *conn, const char *arguments) {
 674         int ws, row, col;
 675         int result;
 676
 677         result = sscanf(arguments, "%d %d %d", &ws, &col, &row);
 678         LOG("Jump called with %d parameters (\"%s\")\n", result, arguments);
 679
 680         /* No match? Either no arguments were specified, or no numbers */
 681         if (result < 1) {
 682                 ELOG("At least one valid argument required\n");
 683                 return;
 684         }
 685
 686         /* Move to the target workspace */
 687         workspace_show(conn, ws);
 688
 689         if (result < 3)
 690                 return;
 691
 692         DLOG("Boundary-checking col %d, row %d... (max cols %d, max rows %d)\n", col, row, c_ws->cols, c_ws->rows);
 693
 694         /* Move to row/col */
 695         if (row >= c_ws->rows)
 696                 row = c_ws->rows - 1;
 697         if (col >= c_ws->cols)
 698                 col = c_ws->cols - 1;
 699
 700         DLOG("Jumping to col %d, row %d\n", col, row);
 701         if (c_ws->table[col][row]->currently_focused != NULL)
 702                 set_focus(conn, c_ws->table[col][row]->currently_focused, true);
 703 }
 704
 705 /*
 706  * Travels the focus stack by the given number of times (or once, if no argument
 707  * was specified). That is, selects the window you were in before you focused
 708  * the current window.
 709  *
 710  * The special values 'floating' (select the next floating window), 'tiling'
 711  * (select the next tiling window), 'ft' (if the current window is floating,
 712  * select the next tiling window and vice-versa) are also valid
 713  *
 714  */
 715 static void travel_focus_stack(xcb_connection_t *conn, const char *arguments) {
 716         /* Start count at -1 to always skip the first element */
 717         int times, count = -1;
 718         Client *current;
 719         bool floating_criteria;
 720
 721         /* Either it’s one of the special values… */
 722         if (strcasecmp(arguments, "floating") == 0) {
 723                 floating_criteria = true;
 724         } else if (strcasecmp(arguments, "tiling") == 0) {
 725                 floating_criteria = false;
 726         } else if (strcasecmp(arguments, "ft") == 0) {
 727                 Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 728                 if (last_focused == SLIST_END(&(c_ws->focus_stack))) {
 729                         ELOG("Cannot select the next floating/tiling client because there is no client at all\n");
 730                         return;
 731                 }
 732
 733                 floating_criteria = !client_is_floating(last_focused);
 734         } else {
 735                 /* …or a number was specified */
 736                 if (sscanf(arguments, "%u", &times) != 1) {
 737                         ELOG("No or invalid argument given (\"%s\"), using default of 1 times\n", arguments);
 738                         times = 1;
 739                 }
 740
 741                 SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients) {
 742                         if (++count < times) {
 743                                 DLOG("Skipping\n");
 744                                 continue;
 745                         }
 746
 747                         DLOG("Focussing\n");
 748                         set_focus(conn, current, true);
 749                         break;
 750                 }
 751                 return;
 752         }
 753
 754         /* Select the next client matching the criteria parsed above */
 755         SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients)
 756                 if (client_is_floating(current) == floating_criteria) {
 757                         set_focus(conn, current, true);
 758                         break;
 759                 }
 760 }
 761
 762 /*
 763  * Goes through the list of arguments (for exec()) and checks if the given argument
 764  * is present. If not, it copies the arguments (because we cannot realloc it) and
 765  * appends the given argument.
 766  *
 767  */
 768 static char **append_argument(char **original, char *argument) {
 769         int num_args;
 770         for (num_args = 0; original[num_args] != NULL; num_args++) {
 771                 DLOG("original argument: \"%s\"\n", original[num_args]);
 772                 /* If the argument is already present we return the original pointer */
 773                 if (strcmp(original[num_args], argument) == 0)
 774                         return original;
 775         }
 776         /* Copy the original array */
 777         char **result = smalloc((num_args+2) * sizeof(char*));
 778         memcpy(result, original, num_args * sizeof(char*));
 779         result[num_args] = argument;
 780         result[num_args+1] = NULL;
 781
 782         return result;
 783 }
 784
 785 /*
 786  * Switch to next or previous existing workspace
 787  *
 788  */
 789 static void next_previous_workspace(xcb_connection_t *conn, int direction) {
 790         Workspace *ws = c_ws;
 791
 792         if (direction == 'n') {
 793                 while ((ws = TAILQ_NEXT(ws, workspaces)) != TAILQ_END(workspaces_head)) {
 794                         if (ws->screen == NULL)
 795                                 continue;
 796
 797                         workspace_show(conn, ws->num + 1);
 798                         return;
 799                 }
 800         } else if (direction == 'p') {
 801                 while ((ws = TAILQ_PREV(ws, workspaces_head, workspaces)) != TAILQ_END(workspaces)) {
 802                         if (ws->screen == NULL)
 803                                 continue;
 804
 805                         workspace_show(conn, ws->num + 1);
 806                         return;
 807                 }
 808         }
 809 }
 810
 811 static void parse_resize_command(xcb_connection_t *conn, Client *last_focused, const char *command) {
 812         int first, second;
 813         resize_orientation_t orientation = O_VERTICAL;
 814         Container *con = last_focused->container;
 815         Workspace *ws = con->workspace;
 816
 817         if (STARTS_WITH(command, "left")) {
 818                 if (con->col == 0)
 819                         return;
 820                 first = con->col - 1;
 821                 second = con->col;
 822                 command += strlen("left");
 823         } else if (STARTS_WITH(command, "right")) {
 824                 first = con->col + (con->colspan - 1);
 825                 DLOG("column %d\n", first);
 826
 827                 if (!cell_exists(first, con->row) ||
 828                     (first == (ws->cols-1)))
 829                         return;
 830
 831                 second = first + 1;
 832                 command += strlen("right");
 833         } else if (STARTS_WITH(command, "top")) {
 834                 if (con->row == 0)
 835                         return;
 836                 first = con->row - 1;
 837                 second = con->row;
 838                 orientation = O_HORIZONTAL;
 839                 command += strlen("top");
 840         } else if (STARTS_WITH(command, "bottom")) {
 841                 first = con->row + (con->rowspan - 1);
 842                 if (!cell_exists(con->col, first) ||
 843                     (first == (ws->rows-1)))
 844                         return;
 845
 846                 second = first + 1;
 847                 orientation = O_HORIZONTAL;
 848                 command += strlen("bottom");
 849         } else {
 850                 ELOG("Syntax: resize <left|right|top|bottom> [+|-]<pixels>\n");
 851                 return;
 852         }
 853
 854         int pixels = atoi(command);
 855         if (pixels == 0)
 856                 return;
 857
 858         resize_container(conn, ws, first, second, orientation, pixels);
 859 }
 860
 861 /*
 862  * Parses a command, see file CMDMODE for more information
 863  *
 864  */
 865 void parse_command(xcb_connection_t *conn, const char *command) {
 866         LOG("--- parsing command \"%s\" ---\n", command);
 867         /* Get the first client from focus stack because floating clients are not
 868          * in any container, therefore CUR_CELL is not appropriate. */
 869         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 870         if (last_focused == SLIST_END(&(c_ws->focus_stack)))
 871                 last_focused = NULL;
 872
 873         /* Hmm, just to be sure */
 874         if (command[0] == '\0')
 875                 return;
 876
 877         /* Is it an <exec>? Then execute the given command. */
 878         if (STARTS_WITH(command, "exec ")) {
 879                 LOG("starting \"%s\"\n", command + strlen("exec "));
 880                 start_application(command+strlen("exec "));
 881                 return;
 882         }
 883
 884         if (STARTS_WITH(command, "mark")) {
 885                 if (last_focused == NULL) {
 886                         ELOG("There is no window to mark\n");
 887                         return;
 888                 }
 889                 const char *rest = command + strlen("mark");
 890                 while (*rest == ' ')
 891                         rest++;
 892                 if (*rest == '\0') {
 893                         DLOG("interactive mark starting\n");
 894                         start_application("i3-input -p 'mark ' -l 1 -P 'Mark: '");
 895                 } else {
 896                         LOG("mark with \"%s\"\n", rest);
 897                         client_mark(conn, last_focused, rest);
 898                 }
 899                 return;
 900         }
 901
 902         if (STARTS_WITH(command, "goto")) {
 903                 const char *rest = command + strlen("goto");
 904                 while (*rest == ' ')
 905                         rest++;
 906                 if (*rest == '\0') {
 907                         DLOG("interactive go to mark starting\n");
 908                         start_application("i3-input -p 'goto ' -l 1 -P 'Goto: '");
 909                 } else {
 910                         LOG("go to \"%s\"\n", rest);
 911                         jump_to_mark(conn, rest);
 912                 }
 913                 return;
 914         }
 915
 916         if (STARTS_WITH(command, "stack-limit ")) {
 917                 if (last_focused == NULL || client_is_floating(last_focused)) {
 918                         ELOG("No container focused\n");
 919                         return;
 920                 }
 921                 const char *rest = command + strlen("stack-limit ");
 922                 if (strncmp(rest, "rows ", strlen("rows ")) == 0) {
 923                         last_focused->container->stack_limit = STACK_LIMIT_ROWS;
 924                         rest += strlen("rows ");
 925                 } else if (strncmp(rest, "cols ", strlen("cols ")) == 0) {
 926                         last_focused->container->stack_limit = STACK_LIMIT_COLS;
 927                         rest += strlen("cols ");
 928                 } else {
 929                         ELOG("Syntax: stack-limit <cols|rows> <limit>\n");
 930                         return;
 931                 }
 932
 933                 last_focused->container->stack_limit_value = atoi(rest);
 934                 if (last_focused->container->stack_limit_value == 0)
 935                         last_focused->container->stack_limit = STACK_LIMIT_NONE;
 936
 937                 return;
 938         }
 939
 940         if (STARTS_WITH(command, "resize ")) {
 941                 if (last_focused == NULL)
 942                         return;
 943                 const char *rest = command + strlen("resize ");
 944                 parse_resize_command(conn, last_focused, rest);
 945                 return;
 946         }
 947
 948         if (STARTS_WITH(command, "mode ")) {
 949                 const char *rest = command + strlen("mode ");
 950                 switch_mode(conn, rest);
 951                 return;
 952         }
 953
 954         /* Is it an <exit>? */
 955         if (STARTS_WITH(command, "exit")) {
 956                 LOG("User issued exit-command, exiting without error.\n");
 957                 exit(EXIT_SUCCESS);
 958         }
 959
 960         /* Is it a <reload>? */
 961         if (STARTS_WITH(command, "reload")) {
 962                 load_configuration(conn, NULL, true);
 963                 return;
 964         }
 965
 966         /* Is it <restart>? Then restart in place. */
 967         if (STARTS_WITH(command, "restart")) {
 968                 LOG("restarting \"%s\"...\n", start_argv[0]);
 969                 /* make sure -a is in the argument list or append it */
 970                 start_argv = append_argument(start_argv, "-a");
 971
 972                 execvp(start_argv[0], start_argv);
 973                 /* not reached */
 974         }
 975
 976         if (STARTS_WITH(command, "kill")) {
 977                 if (last_focused == NULL) {
 978                         ELOG("There is no window to kill\n");
 979                         return;
 980                 }
 981
 982                 LOG("Killing current window\n");
 983                 client_kill(conn, last_focused);
 984                 return;
 985         }
 986
 987         /* Is it a jump to a specified workspace, row, col? */
 988         if (STARTS_WITH(command, "jump ")) {
 989                 const char *arguments = command + strlen("jump ");
 990                 if (arguments[0] == '"')
 991                         jump_to_window(conn, arguments);
 992                 else jump_to_container(conn, arguments);
 993                 return;
 994         }
 995
 996         /* Should we travel the focus stack? */
 997         if (STARTS_WITH(command, "focus")) {
 998                 const char *arguments = command + strlen("focus ");
 999                 travel_focus_stack(conn, arguments);
1000                 return;
1001         }
1002
1003         /* Is it 'f' for fullscreen? */
1004         if (command[0] == 'f') {
1005                 if (last_focused == NULL)
1006                         return;
1007                 client_toggle_fullscreen(conn, last_focused);
1008                 return;
1009         }
1010
1011         /* Is it just 's' for stacking or 'd' for default? */
1012         if ((command[0] == 's' || command[0] == 'd' || command[0] == 'T') && (command[1] == '\0')) {
1013                 if (last_focused != NULL && client_is_floating(last_focused)) {
1014                         ELOG("not switching, this is a floating client\n");
1015                         return;
1016                 }
1017                 LOG("Switching mode for current container\n");
1018                 int new_mode = MODE_DEFAULT;
1019                 if (command[0] == 's')
1020                         new_mode = MODE_STACK;
1021                 if (command[0] == 'T')
1022                         new_mode = MODE_TABBED;
1023                 switch_layout_mode(conn, CUR_CELL, new_mode);
1024                 return;
1025         }
1026
1027         /* Is it 'bn' (border normal), 'bp' (border 1pixel) or 'bb' (border borderless)? */
1028         /* or even 'bt' (toggle border: 'bp' -> 'bb' -> 'bn' ) */
1029         if (command[0] == 'b') {
1030                 if (last_focused == NULL) {
1031                         ELOG("No window focused, cannot change border type\n");
1032                         return;
1033                 }
1034
1035                 char com = command[1];
1036                 if (command[1] == 't') {
1037                         if (last_focused->titlebar_position == TITLEBAR_TOP &&
1038                             !last_focused->borderless)
1039                             com = 'p';
1040                         else if (last_focused->titlebar_position == TITLEBAR_OFF &&
1041                                  !last_focused->borderless)
1042                             com = 'b';
1043                         else com = 'n';
1044                 }
1045
1046                 client_change_border(conn, last_focused, com);
1047                 return;
1048         }
1049
1050         if (command[0] == 'H') {
1051                 LOG("Hiding all floating windows\n");
1052                 floating_toggle_hide(conn, c_ws);
1053                 return;
1054         }
1055
1056         enum { WITH_WINDOW, WITH_CONTAINER, WITH_WORKSPACE, WITH_SCREEN } with = WITH_WINDOW;
1057
1058         /* Is it a <with>? */
1059         if (command[0] == 'w') {
1060                 command++;
1061                 /* TODO: implement */
1062                 if (command[0] == 'c') {
1063                         with = WITH_CONTAINER;
1064                         command++;
1065                 } else if (command[0] == 'w') {
1066                         with = WITH_WORKSPACE;
1067                         command++;
1068                 } else if (command[0] == 's') {
1069                         with = WITH_SCREEN;
1070                         command++;
1071                 } else {
1072                         ELOG("not yet implemented.\n");
1073                         return;
1074                 }
1075         }
1076
1077         /* Is it 't' for toggle tiling/floating? */
1078         if (command[0] == 't') {
1079                 if (with == WITH_WORKSPACE) {
1080                         c_ws->auto_float = !c_ws->auto_float;
1081                         LOG("autofloat is now %d\n", c_ws->auto_float);
1082                         return;
1083                 }
1084                 if (last_focused == NULL) {
1085                         ELOG("Cannot toggle tiling/floating: workspace empty\n");
1086                         return;
1087                 }
1088
1089                 Workspace *ws = last_focused->workspace;
1090
1091                 toggle_floating_mode(conn, last_focused, false);
1092                 /* delete all empty columns/rows */
1093                 cleanup_table(conn, ws);
1094
1095                 /* Fix colspan/rowspan if it’d overlap */
1096                 fix_colrowspan(conn, ws);
1097
1098                 render_workspace(conn, ws->screen, ws);
1099
1100                 /* Re-focus the client because cleanup_table sets the focus to the last
1101                  * focused client inside a container only. */
1102                 set_focus(conn, last_focused, true);
1103
1104                 return;
1105         }
1106
1107         /* Is it 'n' or 'p' for next/previous workspace? (nw) */
1108         if ((command[0] == 'n' || command[0] == 'p') && command[1] == 'w') {
1109                next_previous_workspace(conn, command[0]);
1110                return;
1111         }
1112
1113         /* It’s a normal <cmd> */
1114         char *rest = NULL;
1115         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
1116         direction_t direction;
1117         int times = strtol(command, &rest, 10);
1118         if (rest == NULL) {
1119                 ELOG("Invalid command (\"%s\")\n", command);
1120                 return;
1121         }
1122
1123         if (*rest == '\0') {
1124                 /* No rest? This was a workspace number, not a times specification */
1125                 workspace_show(conn, times);
1126                 return;
1127         }
1128
1129         if (*rest == 'm' || *rest == 's') {
1130                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
1131                 rest++;
1132         }
1133
1134         int workspace = strtol(rest, &rest, 10);
1135
1136         if (rest == NULL) {
1137                 ELOG("Invalid command (\"%s\")\n", command);
1138                 return;
1139         }
1140
1141         if (*rest == '\0') {
1142                 if (last_focused != NULL && client_is_floating(last_focused))
1143                         move_floating_window_to_workspace(conn, last_focused, workspace);
1144                 else move_current_window_to_workspace(conn, workspace);
1145                 return;
1146         }
1147
1148         if (last_focused == NULL) {
1149                 ELOG("Not performing (no window found)\n");
1150                 return;
1151         }
1152
1153         if (client_is_floating(last_focused) &&
1154             (action != ACTION_FOCUS && action != ACTION_MOVE)) {
1155                 ELOG("Not performing (floating)\n");
1156                 return;
1157         }
1158
1159         /* Now perform action to <where> */
1160         while (*rest != '\0') {
1161                 if (*rest == 'h')
1162                         direction = D_LEFT;
1163                 else if (*rest == 'j')
1164                         direction = D_DOWN;
1165                 else if (*rest == 'k')
1166                         direction = D_UP;
1167                 else if (*rest == 'l')
1168                         direction = D_RIGHT;
1169                 else {
1170                         ELOG("unknown direction: %c\n", *rest);
1171                         return;
1172                 }
1173                 rest++;
1174
1175                 if (action == ACTION_FOCUS) {
1176                         if (with == WITH_SCREEN) {
1177                                 focus_thing(conn, direction, THING_SCREEN);
1178                                 continue;
1179                         }
1180                         if (client_is_floating(last_focused)) {
1181                                 floating_focus_direction(conn, last_focused, direction);
1182                                 continue;
1183                         }
1184                         focus_thing(conn, direction, (with == WITH_WINDOW ? THING_WINDOW : THING_CONTAINER));
1185                         continue;
1186                 }
1187
1188                 if (action == ACTION_MOVE) {
1189                         if (with == WITH_SCREEN) {
1190                                 /* TODO: this should swap the screen’s contents
1191                                  * (e.g. all workspaces) with the next/previous/…
1192                                  * screen */
1193                                 ELOG("Not yet implemented\n");
1194                                 continue;
1195                         }
1196                         if (client_is_floating(last_focused)) {
1197                                 floating_move(conn, last_focused, direction);
1198                                 continue;
1199                         }
1200                         if (with == WITH_WINDOW)
1201                                 move_current_window(conn, direction);
1202                         else move_current_container(conn, direction);
1203                         continue;
1204                 }
1205
1206                 if (action == ACTION_SNAP) {
1207                         if (with == WITH_SCREEN) {
1208                                 ELOG("You cannot snap a screen (it makes no sense).\n");
1209                                 continue;
1210                         }
1211                         snap_current_container(conn, direction);
1212                         continue;
1213                 }
1214         }
1215 }