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
  28 bool focus_window_in_container(xcb_connection_t *conn, Container *container, direction_t direction) {
  29         /* If this container is empty, we’re done */
  30         if (container->currently_focused == NULL)
  31                 return false;
  32
  33         /* Get the previous/next client or wrap around */
  34         Client *candidate = NULL;
  35         if (direction == D_UP) {
  36                 if ((candidate = CIRCLEQ_PREV_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  37                         candidate = CIRCLEQ_LAST(&(container->clients));
  38         }
  39         else if (direction == D_DOWN) {
  40                 if ((candidate = CIRCLEQ_NEXT_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  41                         candidate = CIRCLEQ_FIRST(&(container->clients));
  42         } else LOG("Direction not implemented!\n");
  43
  44         /* If we could not switch, the container contains exactly one client. We return false */
  45         if (candidate == container->currently_focused)
  46                 return false;
  47
  48         /* Set focus */
  49         set_focus(conn, candidate, true);
  50
  51         return true;
  52 }
  53
  54 typedef enum { THING_WINDOW, THING_CONTAINER } thing_t;
  55
  56 static void focus_thing(xcb_connection_t *conn, direction_t direction, thing_t thing) {
  57         LOG("focusing direction %d\n", direction);
  58
  59         int new_row = current_row,
  60             new_col = current_col;
  61
  62         Container *container = CUR_CELL;
  63         Workspace *t_ws = c_ws;
  64
  65         /* There always is a container. If not, current_col or current_row is wrong */
  66         assert(container != NULL);
  67
  68         if (container->workspace->fullscreen_client != NULL) {
  69                 LOG("You're in fullscreen mode. Won't switch focus\n");
  70                 return;
  71         }
  72
  73         /* TODO: for horizontal default layout, this has to be expanded to LEFT/RIGHT */
  74         if (direction == D_UP || direction == D_DOWN) {
  75                 if (thing == THING_WINDOW)
  76                         /* Let’s see if we can perform up/down focus in the current container */
  77                         if (focus_window_in_container(conn, container, direction))
  78                                 return;
  79
  80                 if (direction == D_DOWN && cell_exists(current_col, current_row+1))
  81                         new_row = current_row + t_ws->table[current_col][current_row]->rowspan;
  82                 else if (direction == D_UP && cell_exists(current_col, current_row-1)) {
  83                         /* Set new_row as a sane default, but it may get overwritten in a second */
  84                         new_row--;
  85
  86                         /* Search from the top to correctly handle rowspanned containers */
  87                         for (int rows = 0; rows < current_row; rows += t_ws->table[current_col][rows]->rowspan) {
  88                                 if (new_row > (rows + (t_ws->table[current_col][rows]->rowspan - 1)))
  89                                         continue;
  90
  91                                 new_row = rows;
  92                                 break;
  93                         }
  94                 } else {
  95                         /* Let’s see if there is a screen down/up there to which we can switch */
  96                         LOG("container is at %d with height %d\n", container->y, container->height);
  97                         i3Screen *screen;
  98                         int destination_y = (direction == D_UP ? (container->y - 1) : (container->y + container->height + 1));
  99                         if ((screen = get_screen_containing(container->x, destination_y)) == NULL) {
 100                                 LOG("Wrapping screen around vertically\n");
 101                                 /* No screen found? Then wrap */
 102                                 screen = get_screen_most((direction == D_UP ? D_DOWN : D_UP));
 103                         }
 104                         t_ws = &(workspaces[screen->current_workspace]);
 105                         new_row = (direction == D_UP ? (t_ws->rows - 1) : 0);
 106                 }
 107         } else if (direction == D_LEFT || direction == D_RIGHT) {
 108                 if (direction == D_RIGHT && cell_exists(current_col+1, current_row))
 109                         new_col = current_col + t_ws->table[current_col][current_row]->colspan;
 110                 else if (direction == D_LEFT && cell_exists(current_col-1, current_row)) {
 111                         /* Set new_col as a sane default, but it may get overwritten in a second */
 112                         new_col--;
 113
 114                         /* Search from the left to correctly handle colspanned containers */
 115                         for (int cols = 0; cols < current_col; cols += t_ws->table[cols][current_row]->colspan) {
 116                                 if (new_col > (cols + (t_ws->table[cols][current_row]->colspan - 1)))
 117                                         continue;
 118
 119                                 new_col = cols;
 120                                 break;
 121                         }
 122                 } else {
 123                         /* Let’s see if there is a screen left/right here to which we can switch */
 124                         LOG("container is at %d with width %d\n", container->x, container->width);
 125                         i3Screen *screen;
 126                         int destination_x = (direction == D_LEFT ? (container->x - 1) : (container->x + container->width + 1));
 127                         if ((screen = get_screen_containing(destination_x, container->y)) == NULL) {
 128                                 LOG("Wrapping screen around horizontally\n");
 129                                 screen = get_screen_most((direction == D_LEFT ? D_RIGHT : D_LEFT));
 130                         }
 131                         t_ws = &(workspaces[screen->current_workspace]);
 132                         new_col = (direction == D_LEFT ? (t_ws->cols - 1) : 0);
 133                 }
 134         } else {
 135                 LOG("direction unhandled\n");
 136                 return;
 137         }
 138
 139         /* Bounds checking */
 140         if (new_col >= t_ws->cols)
 141                 new_col = (t_ws->cols - 1);
 142         if (new_row >= t_ws->rows)
 143                 new_row = (t_ws->rows - 1);
 144
 145         if (t_ws->table[new_col][new_row]->currently_focused != NULL)
 146                 set_focus(conn, t_ws->table[new_col][new_row]->currently_focused, true);
 147 }
 148
 149 /*
 150  * Tries to move the window inside its current container.
 151  *
 152  * Returns true if the window could be moved, false otherwise.
 153  *
 154  */
 155 static bool move_current_window_in_container(xcb_connection_t *conn, Client *client,
 156                 direction_t direction) {
 157         assert(client->container != NULL);
 158
 159         Client *other = (direction == D_UP ? CIRCLEQ_PREV(client, clients) :
 160                                              CIRCLEQ_NEXT(client, clients));
 161
 162         if (other == CIRCLEQ_END(&(client->container->clients)))
 163                 return false;
 164
 165         LOG("i can do that\n");
 166         /* We can move the client inside its current container */
 167         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 168         if (direction == D_UP)
 169                 CIRCLEQ_INSERT_BEFORE(&(client->container->clients), other, client, clients);
 170         else CIRCLEQ_INSERT_AFTER(&(client->container->clients), other, client, clients);
 171         render_layout(conn);
 172         return true;
 173 }
 174
 175 /*
 176  * Moves the current window or whole container to the given direction, creating a column/row if
 177  * necessary.
 178  *
 179  */
 180 static void move_current_window(xcb_connection_t *conn, direction_t direction) {
 181         LOG("moving window to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 182                                             (direction == D_LEFT ? "left" : "right"))));
 183         /* Get current window */
 184         Container *container = CUR_CELL,
 185                   *new = NULL;
 186
 187         /* There has to be a container, see focus_window() */
 188         assert(container != NULL);
 189
 190         /* If there is no window or the dock window is focused, we’re done */
 191         if (container->currently_focused == NULL ||
 192             container->currently_focused->dock)
 193                 return;
 194
 195         /* As soon as the client is moved away, the last focused client in the old
 196          * container needs to get focus, if any. Therefore, we save it here. */
 197         Client *current_client = container->currently_focused;
 198         Client *to_focus = get_last_focused_client(conn, container, current_client);
 199
 200         if (to_focus == NULL) {
 201                 to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 202                 if (to_focus == NULL)
 203                         to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 204         }
 205
 206         switch (direction) {
 207                 case D_LEFT:
 208                         /* If we’re at the left-most position, move the rest of the table right */
 209                         if (current_col == 0) {
 210                                 expand_table_cols_at_head(c_ws);
 211                                 new = CUR_CELL;
 212                         } else
 213                                 new = CUR_TABLE[--current_col][current_row];
 214                         break;
 215                 case D_RIGHT:
 216                         if (current_col == (c_ws->cols-1))
 217                                 expand_table_cols(c_ws);
 218
 219                         new = CUR_TABLE[++current_col][current_row];
 220                         break;
 221                 case D_UP:
 222                         if (move_current_window_in_container(conn, current_client, D_UP))
 223                                 return;
 224
 225                         /* if we’re at the up-most position, move the rest of the table down */
 226                         if (current_row == 0) {
 227                                 expand_table_rows_at_head(c_ws);
 228                                 new = CUR_CELL;
 229                         } else
 230                                 new = CUR_TABLE[current_col][--current_row];
 231                         break;
 232                 case D_DOWN:
 233                         if (move_current_window_in_container(conn, current_client, D_DOWN))
 234                                 return;
 235
 236                         if (current_row == (c_ws->rows-1))
 237                                 expand_table_rows(c_ws);
 238
 239                         new = CUR_TABLE[current_col][++current_row];
 240                         break;
 241         }
 242
 243         /* Remove it from the old container and put it into the new one */
 244         client_remove_from_container(conn, current_client, container);
 245
 246         if (new->currently_focused != NULL)
 247                 CIRCLEQ_INSERT_AFTER(&(new->clients), new->currently_focused, current_client, clients);
 248         else CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
 249         SLIST_INSERT_HEAD(&(new->workspace->focus_stack), current_client, focus_clients);
 250
 251         /* Update data structures */
 252         current_client->container = new;
 253         container->currently_focused = to_focus;
 254         new->currently_focused = current_client;
 255
 256         Workspace *workspace = container->workspace;
 257
 258         /* delete all empty columns/rows */
 259         cleanup_table(conn, workspace);
 260
 261         /* Fix colspan/rowspan if it’d overlap */
 262         fix_colrowspan(conn, workspace);
 263
 264         render_layout(conn);
 265
 266         set_focus(conn, current_client, true);
 267 }
 268
 269 static void move_current_container(xcb_connection_t *conn, direction_t direction) {
 270         LOG("moving container to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 271                                             (direction == D_LEFT ? "left" : "right"))));
 272         /* Get current window */
 273         Container *container = CUR_CELL,
 274                   *new = NULL;
 275
 276         Container **old = &CUR_CELL;
 277
 278         /* There has to be a container, see focus_window() */
 279         assert(container != NULL);
 280
 281         switch (direction) {
 282                 case D_LEFT:
 283                         /* If we’re at the left-most position, move the rest of the table right */
 284                         if (current_col == 0) {
 285                                 expand_table_cols_at_head(c_ws);
 286                                 new = CUR_CELL;
 287                                 old = &CUR_TABLE[current_col+1][current_row];
 288                         } else
 289                                 new = CUR_TABLE[--current_col][current_row];
 290                         break;
 291                 case D_RIGHT:
 292                         if (current_col == (c_ws->cols-1))
 293                                 expand_table_cols(c_ws);
 294
 295                         new = CUR_TABLE[++current_col][current_row];
 296                         break;
 297                 case D_UP:
 298                         /* if we’re at the up-most position, move the rest of the table down */
 299                         if (current_row == 0) {
 300                                 expand_table_rows_at_head(c_ws);
 301                                 new = CUR_CELL;
 302                                 old = &CUR_TABLE[current_col][current_row+1];
 303                         } else
 304                                 new = CUR_TABLE[current_col][--current_row];
 305                         break;
 306                 case D_DOWN:
 307                         if (current_row == (c_ws->rows-1))
 308                                 expand_table_rows(c_ws);
 309
 310                         new = CUR_TABLE[current_col][++current_row];
 311                         break;
 312         }
 313
 314         LOG("old = %d,%d and new = %d,%d\n", container->col, container->row, new->col, new->row);
 315
 316         /* Swap the containers */
 317         int col = new->col;
 318         int row = new->row;
 319
 320         *old = new;
 321         new->col = container->col;
 322         new->row = container->row;
 323
 324         CUR_CELL = container;
 325         container->col = col;
 326         container->row = row;
 327
 328         Workspace *workspace = container->workspace;
 329
 330         /* delete all empty columns/rows */
 331         cleanup_table(conn, workspace);
 332
 333         /* Fix colspan/rowspan if it’d overlap */
 334         fix_colrowspan(conn, workspace);
 335
 336         render_layout(conn);
 337 }
 338
 339 /*
 340  * "Snaps" the current container (not possible for windows, because it works at table base)
 341  * to the given direction, that is, adjusts cellspan/rowspan
 342  *
 343  */
 344 static void snap_current_container(xcb_connection_t *conn, direction_t direction) {
 345         LOG("snapping container to direction %d\n", direction);
 346
 347         Container *container = CUR_CELL;
 348
 349         assert(container != NULL);
 350
 351         switch (direction) {
 352                 case D_LEFT:
 353                         /* Snap to the left is actually a move to the left and then a snap right */
 354                         if (!cell_exists(container->col - 1, container->row) ||
 355                                 CUR_TABLE[container->col-1][container->row]->currently_focused != NULL) {
 356                                 LOG("cannot snap to left - the cell is already used\n");
 357                                 return;
 358                         }
 359
 360                         move_current_window(conn, D_LEFT);
 361                         snap_current_container(conn, D_RIGHT);
 362                         return;
 363                 case D_RIGHT: {
 364                         /* Check if the cell is used */
 365                         int new_col = container->col + container->colspan;
 366                         if (!cell_exists(new_col, container->row) ||
 367                                 CUR_TABLE[new_col][container->row]->currently_focused != NULL) {
 368                                 LOG("cannot snap to right - the cell is already used\n");
 369                                 return;
 370                         }
 371
 372                         /* Check if there are other cells with rowspan, which are in our way.
 373                          * If so, reduce their rowspan. */
 374                         for (int i = container->row-1; i >= 0; i--) {
 375                                 LOG("we got cell %d, %d with rowspan %d\n",
 376                                                 new_col, i, CUR_TABLE[new_col][i]->rowspan);
 377                                 while ((CUR_TABLE[new_col][i]->rowspan-1) >= (container->row - i))
 378                                         CUR_TABLE[new_col][i]->rowspan--;
 379                                 LOG("new rowspan = %d\n", CUR_TABLE[new_col][i]->rowspan);
 380                         }
 381
 382                         container->colspan++;
 383                         break;
 384                 }
 385                 case D_UP:
 386                         if (!cell_exists(container->col, container->row - 1) ||
 387                                 CUR_TABLE[container->col][container->row-1]->currently_focused != NULL) {
 388                                 LOG("cannot snap to top - the cell is already used\n");
 389                                 return;
 390                         }
 391
 392                         move_current_window(conn, D_UP);
 393                         snap_current_container(conn, D_DOWN);
 394                         return;
 395                 case D_DOWN: {
 396                         LOG("snapping down\n");
 397                         int new_row = container->row + container->rowspan;
 398                         if (!cell_exists(container->col, new_row) ||
 399                                 CUR_TABLE[container->col][new_row]->currently_focused != NULL) {
 400                                 LOG("cannot snap down - the cell is already used\n");
 401                                 return;
 402                         }
 403
 404                         for (int i = container->col-1; i >= 0; i--) {
 405                                 LOG("we got cell %d, %d with colspan %d\n",
 406                                                 i, new_row, CUR_TABLE[i][new_row]->colspan);
 407                                 while ((CUR_TABLE[i][new_row]->colspan-1) >= (container->col - i))
 408                                         CUR_TABLE[i][new_row]->colspan--;
 409                                 LOG("new colspan = %d\n", CUR_TABLE[i][new_row]->colspan);
 410
 411                         }
 412
 413                         container->rowspan++;
 414                         break;
 415                 }
 416         }
 417
 418         render_layout(conn);
 419 }
 420
 421 /*
 422  * Moves the currently selected window to the given workspace
 423  *
 424  */
 425 static void move_current_window_to_workspace(xcb_connection_t *conn, int workspace) {
 426         LOG("Moving current window to workspace %d\n", workspace);
 427
 428         Container *container = CUR_CELL;
 429
 430         assert(container != NULL);
 431
 432         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 433         Workspace *t_ws = &(workspaces[workspace-1]);
 434
 435         Client *current_client = container->currently_focused;
 436         if (current_client == NULL) {
 437                 LOG("No currently focused client in current container.\n");
 438                 return;
 439         }
 440         Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 441         if (to_focus == NULL)
 442                 to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 443
 444         if (t_ws->screen == NULL) {
 445                 LOG("initializing new workspace, setting num to %d\n", workspace-1);
 446                 t_ws->screen = container->workspace->screen;
 447                 /* Copy the dimensions from the virtual screen */
 448                 memcpy(&(t_ws->rect), &(container->workspace->screen->rect), sizeof(Rect));
 449         } else {
 450                 /* Check if there is already a fullscreen client on the destination workspace and
 451                  * stop moving if so. */
 452                 if (current_client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 453                         LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 454                         return;
 455                 }
 456         }
 457
 458         Container *to_container = t_ws->table[t_ws->current_col][t_ws->current_row];
 459
 460         assert(to_container != NULL);
 461
 462         client_remove_from_container(conn, current_client, container);
 463         if (container->workspace->fullscreen_client == current_client)
 464                 container->workspace->fullscreen_client = NULL;
 465
 466         CIRCLEQ_INSERT_TAIL(&(to_container->clients), current_client, clients);
 467         SLIST_INSERT_HEAD(&(to_container->workspace->focus_stack), current_client, focus_clients);
 468         if (current_client->fullscreen)
 469                 t_ws->fullscreen_client = current_client;
 470         LOG("Moved.\n");
 471
 472         current_client->container = to_container;
 473         container->currently_focused = to_focus;
 474         to_container->currently_focused = current_client;
 475
 476         /* If we’re moving it to an invisible screen, we need to unmap it */
 477         if (to_container->workspace->screen->current_workspace != to_container->workspace->num) {
 478                 LOG("This workspace is not visible, unmapping\n");
 479                 xcb_unmap_window(conn, current_client->frame);
 480         }
 481
 482         /* delete all empty columns/rows */
 483         cleanup_table(conn, container->workspace);
 484
 485         render_layout(conn);
 486 }
 487
 488 /*
 489  * Switches to the given workspace
 490  *
 491  */
 492 void show_workspace(xcb_connection_t *conn, int workspace) {
 493         Client *client;
 494         bool need_warp = false;
 495         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 496         /* t_ws (to workspace) is just a convenience pointer to the workspace we’re switching to */
 497         Workspace *t_ws = &(workspaces[workspace-1]);
 498
 499         LOG("show_workspace(%d)\n", workspace);
 500
 501         /* Store current_row/current_col */
 502         c_ws->current_row = current_row;
 503         c_ws->current_col = current_col;
 504
 505         /* Check if the workspace has not been used yet */
 506         if (t_ws->screen == NULL) {
 507                 LOG("initializing new workspace, setting num to %d\n", workspace);
 508                 t_ws->screen = c_ws->screen;
 509                 /* Copy the dimensions from the virtual screen */
 510                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 511         }
 512
 513         if (c_ws->screen != t_ws->screen) {
 514                 /* We need to switch to the other screen first */
 515                 LOG("moving over to other screen.\n");
 516
 517                 /* Store the old client */
 518                 Client *old_client = CUR_CELL->currently_focused;
 519
 520                 c_ws = &(workspaces[t_ws->screen->current_workspace]);
 521                 current_col = c_ws->current_col;
 522                 current_row = c_ws->current_row;
 523                 if (CUR_CELL->currently_focused != NULL)
 524                         need_warp = true;
 525                 else {
 526                         Rect *dims = &(c_ws->screen->rect);
 527                         xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0,
 528                                          dims->x + (dims->width / 2), dims->y + (dims->height / 2));
 529                 }
 530
 531                 /* Re-decorate the old client, it’s not focused anymore */
 532                 if ((old_client != NULL) && !old_client->dock)
 533                         redecorate_window(conn, old_client);
 534                 else xcb_flush(conn);
 535         }
 536
 537         /* Check if we need to change something or if we’re already there */
 538         if (c_ws->screen->current_workspace == (workspace-1)) {
 539                 if (CUR_CELL->currently_focused != NULL) {
 540                         set_focus(conn, CUR_CELL->currently_focused, true);
 541                         if (need_warp) {
 542                                 client_warp_pointer_into(conn, CUR_CELL->currently_focused);
 543                                 xcb_flush(conn);
 544                         }
 545                 }
 546                 return;
 547         }
 548
 549         t_ws->screen->current_workspace = workspace-1;
 550
 551         /* Unmap all clients of the current workspace */
 552         unmap_workspace(conn, c_ws);
 553
 554         c_ws = &workspaces[workspace-1];
 555         current_row = c_ws->current_row;
 556         current_col = c_ws->current_col;
 557         LOG("new current row = %d, current col = %d\n", current_row, current_col);
 558
 559         ignore_enter_notify_forall(conn, c_ws, true);
 560
 561         /* Map all clients on the new workspace */
 562         FOR_TABLE(c_ws)
 563                 CIRCLEQ_FOREACH(client, &(c_ws->table[cols][rows]->clients), clients)
 564                         xcb_map_window(conn, client->frame);
 565
 566         /* Map all stack windows, if any */
 567         struct Stack_Window *stack_win;
 568         SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 569                 if (stack_win->container->workspace == c_ws)
 570                         xcb_map_window(conn, stack_win->window);
 571
 572         ignore_enter_notify_forall(conn, c_ws, false);
 573
 574         /* Restore focus on the new workspace */
 575         if (CUR_CELL->currently_focused != NULL) {
 576                 set_focus(conn, CUR_CELL->currently_focused, true);
 577                 if (need_warp) {
 578                         client_warp_pointer_into(conn, CUR_CELL->currently_focused);
 579                         xcb_flush(conn);
 580                 }
 581         } else xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
 582
 583         render_layout(conn);
 584 }
 585
 586 /*
 587  * Jumps to the given window class / title.
 588  * Title is matched using strstr, that is, matches if it appears anywhere
 589  * in the string. Regular expressions seem to be a bit overkill here. However,
 590  * if we need them for something else somewhen, we may introduce them here, too.
 591  *
 592  */
 593 static void jump_to_window(xcb_connection_t *conn, const char *arguments) {
 594         char *classtitle;
 595         Client *client;
 596
 597         /* The first character is a quote, this was checked before */
 598         classtitle = sstrdup(arguments+1);
 599         /* The last character is a quote, we just set it to NULL */
 600         classtitle[strlen(classtitle)-1] = '\0';
 601
 602         if ((client = get_matching_client(conn, classtitle, NULL)) == NULL) {
 603                 free(classtitle);
 604                 LOG("No matching client found.\n");
 605                 return;
 606         }
 607
 608         free(classtitle);
 609         set_focus(conn, client, true);
 610 }
 611
 612 /*
 613  * Jump directly to the specified workspace, row and col.
 614  * Great for reaching windows that you always keep in the same spot (hello irssi, I'm looking at you)
 615  *
 616  */
 617 static void jump_to_container(xcb_connection_t *conn, const char *arguments) {
 618         int ws, row, col;
 619         int result;
 620
 621         result = sscanf(arguments, "%d %d %d", &ws, &col, &row);
 622         LOG("Jump called with %d parameters (\"%s\")\n", result, arguments);
 623
 624         /* No match? Either no arguments were specified, or no numbers */
 625         if (result < 1) {
 626                 LOG("At least one valid argument required\n");
 627                 return;
 628         }
 629
 630         /* Move to the target workspace */
 631         show_workspace(conn, ws);
 632
 633         if (result < 3)
 634                 return;
 635
 636         LOG("Boundary-checking col %d, row %d... (max cols %d, max rows %d)\n", col, row, c_ws->cols, c_ws->rows);
 637
 638         /* Move to row/col */
 639         if (row >= c_ws->rows)
 640                 row = c_ws->rows - 1;
 641         if (col >= c_ws->cols)
 642                 col = c_ws->cols - 1;
 643
 644         LOG("Jumping to col %d, row %d\n", col, row);
 645         if (c_ws->table[col][row]->currently_focused != NULL)
 646                 set_focus(conn, c_ws->table[col][row]->currently_focused, true);
 647 }
 648
 649 /*
 650  * Travels the focus stack by the given number of times (or once, if no argument
 651  * was specified). That is, selects the window you were in before you focused
 652  * the current window.
 653  *
 654  */
 655 static void travel_focus_stack(xcb_connection_t *conn, const char *arguments) {
 656         /* Start count at -1 to always skip the first element */
 657         int times, count = -1;
 658         Client *current;
 659
 660         if (sscanf(arguments, "%u", &times) != 1) {
 661                 LOG("No or invalid argument given (\"%s\"), using default of 1 times\n", arguments);
 662                 times = 1;
 663         }
 664
 665         Workspace *ws = CUR_CELL->workspace;
 666
 667         SLIST_FOREACH(current, &(ws->focus_stack), focus_clients) {
 668                 if (++count < times) {
 669                         LOG("Skipping\n");
 670                         continue;
 671                 }
 672
 673                 LOG("Focussing\n");
 674                 set_focus(conn, current, true);
 675                 break;
 676         }
 677 }
 678
 679 /*
 680  * Parses a command, see file CMDMODE for more information
 681  *
 682  */
 683 void parse_command(xcb_connection_t *conn, const char *command) {
 684         LOG("--- parsing command \"%s\" ---\n", command);
 685         /* Hmm, just to be sure */
 686         if (command[0] == '\0')
 687                 return;
 688
 689         /* Is it an <exec>? Then execute the given command. */
 690         if (STARTS_WITH(command, "exec ")) {
 691                 LOG("starting \"%s\"\n", command + strlen("exec "));
 692                 start_application(command+strlen("exec "));
 693                 return;
 694         }
 695
 696         /* Is it an <exit>? */
 697         if (STARTS_WITH(command, "exit")) {
 698                 LOG("User issued exit-command, exiting without error.\n");
 699                 exit(EXIT_SUCCESS);
 700         }
 701
 702         /* Is it <restart>? Then restart in place. */
 703         if (STARTS_WITH(command, "restart")) {
 704                 LOG("restarting \"%s\"...\n", start_argv[0]);
 705                 execvp(start_argv[0], start_argv);
 706                 /* not reached */
 707         }
 708
 709         if (STARTS_WITH(command, "kill")) {
 710                 if (CUR_CELL->currently_focused == NULL) {
 711                         LOG("There is no window to kill\n");
 712                         return;
 713                 }
 714
 715                 LOG("Killing current window\n");
 716                 client_kill(conn, CUR_CELL->currently_focused);
 717                 return;
 718         }
 719
 720         /* Is it a jump to a specified workspae, row, col? */
 721         if (STARTS_WITH(command, "jump ")) {
 722                 const char *arguments = command + strlen("jump ");
 723                 if (arguments[0] == '"')
 724                         jump_to_window(conn, arguments);
 725                 else jump_to_container(conn, arguments);
 726                 return;
 727         }
 728
 729         /* Should we travel the focus stack? */
 730         if (STARTS_WITH(command, "focus")) {
 731                 const char *arguments = command + strlen("focus");
 732                 travel_focus_stack(conn, arguments);
 733                 return;
 734         }
 735
 736         /* Is it 'f' for fullscreen? */
 737         if (command[0] == 'f') {
 738                 if (CUR_CELL->currently_focused == NULL)
 739                         return;
 740                 toggle_fullscreen(conn, CUR_CELL->currently_focused);
 741                 return;
 742         }
 743
 744         /* Is it just 's' for stacking or 'd' for default? */
 745         if ((command[0] == 's' || command[0] == 'd') && (command[1] == '\0')) {
 746                 LOG("Switching mode for current container\n");
 747                 switch_layout_mode(conn, CUR_CELL, (command[0] == 's' ? MODE_STACK : MODE_DEFAULT));
 748                 return;
 749         }
 750
 751         enum { WITH_WINDOW, WITH_CONTAINER } with = WITH_WINDOW;
 752
 753         /* Is it a <with>? */
 754         if (command[0] == 'w') {
 755                 command++;
 756                 /* TODO: implement */
 757                 if (command[0] == 'c') {
 758                         with = WITH_CONTAINER;
 759                         command++;
 760                 } else {
 761                         LOG("not yet implemented.\n");
 762                         return;
 763                 }
 764         }
 765
 766         /* It's a normal <cmd> */
 767         char *rest = NULL;
 768         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
 769         direction_t direction;
 770         int times = strtol(command, &rest, 10);
 771         if (rest == NULL) {
 772                 LOG("Invalid command (\"%s\")\n", command);
 773                 return;
 774         }
 775
 776         if (*rest == '\0') {
 777                 /* No rest? This was a tag number, not a times specification */
 778                 show_workspace(conn, times);
 779                 return;
 780         }
 781
 782         if (*rest == 'm' || *rest == 's') {
 783                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
 784                 rest++;
 785         }
 786
 787         int workspace = strtol(rest, &rest, 10);
 788
 789         if (rest == NULL) {
 790                 LOG("Invalid command (\"%s\")\n", command);
 791                 return;
 792         }
 793
 794         if (*rest == '\0') {
 795                 move_current_window_to_workspace(conn, workspace);
 796                 return;
 797         }
 798
 799         /* Now perform action to <where> */
 800         while (*rest != '\0') {
 801                 if (*rest == 'h')
 802                         direction = D_LEFT;
 803                 else if (*rest == 'j')
 804                         direction = D_DOWN;
 805                 else if (*rest == 'k')
 806                         direction = D_UP;
 807                 else if (*rest == 'l')
 808                         direction = D_RIGHT;
 809                 else {
 810                         LOG("unknown direction: %c\n", *rest);
 811                         return;
 812                 }
 813
 814                 if (action == ACTION_FOCUS)
 815                         focus_thing(conn, direction, (with == WITH_WINDOW ? THING_WINDOW : THING_CONTAINER));
 816                 else if (action == ACTION_MOVE) {
 817                         if (with == WITH_WINDOW)
 818                                 move_current_window(conn, direction);
 819                         else move_current_container(conn, direction);
 820                 }
 821                 else if (action == ACTION_SNAP)
 822                         snap_current_container(conn, direction);
 823
 824                 rest++;
 825         }
 826
 827         LOG("--- done ---\n");
 828 }