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
  29 bool focus_window_in_container(xcb_connection_t *conn, Container *container, direction_t direction) {
  30         /* If this container is empty, we’re done */
  31         if (container->currently_focused == NULL)
  32                 return false;
  33
  34         /* Get the previous/next client or wrap around */
  35         Client *candidate = NULL;
  36         if (direction == D_UP) {
  37                 if ((candidate = CIRCLEQ_PREV_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  38                         candidate = CIRCLEQ_LAST(&(container->clients));
  39         }
  40         else if (direction == D_DOWN) {
  41                 if ((candidate = CIRCLEQ_NEXT_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  42                         candidate = CIRCLEQ_FIRST(&(container->clients));
  43         } else LOG("Direction not implemented!\n");
  44
  45         /* If we could not switch, the container contains exactly one client. We return false */
  46         if (candidate == container->currently_focused)
  47                 return false;
  48
  49         /* Set focus */
  50         set_focus(conn, candidate, true);
  51
  52         return true;
  53 }
  54
  55 typedef enum { THING_WINDOW, THING_CONTAINER } thing_t;
  56
  57 static void focus_thing(xcb_connection_t *conn, direction_t direction, thing_t thing) {
  58         LOG("focusing direction %d\n", direction);
  59
  60         int new_row = current_row,
  61             new_col = current_col;
  62
  63         Container *container = CUR_CELL;
  64         Workspace *t_ws = c_ws;
  65
  66         /* There always is a container. If not, current_col or current_row is wrong */
  67         assert(container != NULL);
  68
  69         if (container->workspace->fullscreen_client != NULL) {
  70                 LOG("You're in fullscreen mode. Won't switch focus\n");
  71                 return;
  72         }
  73
  74         /* TODO: for horizontal default layout, this has to be expanded to LEFT/RIGHT */
  75         if (direction == D_UP || direction == D_DOWN) {
  76                 if (thing == THING_WINDOW)
  77                         /* Let’s see if we can perform up/down focus in the current container */
  78                         if (focus_window_in_container(conn, container, direction))
  79                                 return;
  80
  81                 if (direction == D_DOWN && cell_exists(current_col, current_row+1))
  82                         new_row = current_row + t_ws->table[current_col][current_row]->rowspan;
  83                 else if (direction == D_UP && cell_exists(current_col, current_row-1)) {
  84                         /* Set new_row as a sane default, but it may get overwritten in a second */
  85                         new_row--;
  86
  87                         /* Search from the top to correctly handle rowspanned containers */
  88                         for (int rows = 0; rows < current_row; rows += t_ws->table[current_col][rows]->rowspan) {
  89                                 if (new_row > (rows + (t_ws->table[current_col][rows]->rowspan - 1)))
  90                                         continue;
  91
  92                                 new_row = rows;
  93                                 break;
  94                         }
  95                 } else {
  96                         /* Let’s see if there is a screen down/up there to which we can switch */
  97                         LOG("container is at %d with height %d\n", container->y, container->height);
  98                         i3Screen *screen;
  99                         int destination_y = (direction == D_UP ? (container->y - 1) : (container->y + container->height + 1));
 100                         if ((screen = get_screen_containing(container->x, destination_y)) == NULL) {
 101                                 LOG("Wrapping screen around vertically\n");
 102                                 /* No screen found? Then wrap */
 103                                 screen = get_screen_most((direction == D_UP ? D_DOWN : D_UP));
 104                         }
 105                         t_ws = &(workspaces[screen->current_workspace]);
 106                         new_row = (direction == D_UP ? (t_ws->rows - 1) : 0);
 107                 }
 108         } else if (direction == D_LEFT || direction == D_RIGHT) {
 109                 if (direction == D_RIGHT && cell_exists(current_col+1, current_row))
 110                         new_col = current_col + t_ws->table[current_col][current_row]->colspan;
 111                 else if (direction == D_LEFT && cell_exists(current_col-1, current_row)) {
 112                         /* Set new_col as a sane default, but it may get overwritten in a second */
 113                         new_col--;
 114
 115                         /* Search from the left to correctly handle colspanned containers */
 116                         for (int cols = 0; cols < current_col; cols += t_ws->table[cols][current_row]->colspan) {
 117                                 if (new_col > (cols + (t_ws->table[cols][current_row]->colspan - 1)))
 118                                         continue;
 119
 120                                 new_col = cols;
 121                                 break;
 122                         }
 123                 } else {
 124                         /* Let’s see if there is a screen left/right here to which we can switch */
 125                         LOG("container is at %d with width %d\n", container->x, container->width);
 126                         i3Screen *screen;
 127                         int destination_x = (direction == D_LEFT ? (container->x - 1) : (container->x + container->width + 1));
 128                         if ((screen = get_screen_containing(destination_x, container->y)) == NULL) {
 129                                 LOG("Wrapping screen around horizontally\n");
 130                                 screen = get_screen_most((direction == D_LEFT ? D_RIGHT : D_LEFT));
 131                         }
 132                         t_ws = &(workspaces[screen->current_workspace]);
 133                         new_col = (direction == D_LEFT ? (t_ws->cols - 1) : 0);
 134                 }
 135         } else {
 136                 LOG("direction unhandled\n");
 137                 return;
 138         }
 139
 140         /* Bounds checking */
 141         if (new_col >= t_ws->cols)
 142                 new_col = (t_ws->cols - 1);
 143         if (new_row >= t_ws->rows)
 144                 new_row = (t_ws->rows - 1);
 145
 146         if (t_ws->table[new_col][new_row]->currently_focused != NULL)
 147                 set_focus(conn, t_ws->table[new_col][new_row]->currently_focused, true);
 148 }
 149
 150 /*
 151  * Tries to move the window inside its current container.
 152  *
 153  * Returns true if the window could be moved, false otherwise.
 154  *
 155  */
 156 static bool move_current_window_in_container(xcb_connection_t *conn, Client *client,
 157                 direction_t direction) {
 158         assert(client->container != NULL);
 159
 160         Client *other = (direction == D_UP ? CIRCLEQ_PREV(client, clients) :
 161                                              CIRCLEQ_NEXT(client, clients));
 162
 163         if (other == CIRCLEQ_END(&(client->container->clients)))
 164                 return false;
 165
 166         LOG("i can do that\n");
 167         /* We can move the client inside its current container */
 168         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 169         if (direction == D_UP)
 170                 CIRCLEQ_INSERT_BEFORE(&(client->container->clients), other, client, clients);
 171         else CIRCLEQ_INSERT_AFTER(&(client->container->clients), other, client, clients);
 172         render_layout(conn);
 173         return true;
 174 }
 175
 176 /*
 177  * Moves the current window or whole container to the given direction, creating a column/row if
 178  * necessary.
 179  *
 180  */
 181 static void move_current_window(xcb_connection_t *conn, direction_t direction) {
 182         LOG("moving window to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 183                                             (direction == D_LEFT ? "left" : "right"))));
 184         /* Get current window */
 185         Container *container = CUR_CELL,
 186                   *new = NULL;
 187
 188         /* There has to be a container, see focus_window() */
 189         assert(container != NULL);
 190
 191         /* If there is no window or the dock window is focused, we’re done */
 192         if (container->currently_focused == NULL ||
 193             container->currently_focused->dock)
 194                 return;
 195
 196         /* As soon as the client is moved away, the last focused client in the old
 197          * container needs to get focus, if any. Therefore, we save it here. */
 198         Client *current_client = container->currently_focused;
 199         Client *to_focus = get_last_focused_client(conn, container, current_client);
 200
 201         if (to_focus == NULL) {
 202                 to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 203                 if (to_focus == NULL)
 204                         to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 205         }
 206
 207         switch (direction) {
 208                 case D_LEFT:
 209                         /* If we’re at the left-most position, move the rest of the table right */
 210                         if (current_col == 0) {
 211                                 expand_table_cols_at_head(c_ws);
 212                                 new = CUR_CELL;
 213                         } else
 214                                 new = CUR_TABLE[--current_col][current_row];
 215                         break;
 216                 case D_RIGHT:
 217                         if (current_col == (c_ws->cols-1))
 218                                 expand_table_cols(c_ws);
 219
 220                         new = CUR_TABLE[++current_col][current_row];
 221                         break;
 222                 case D_UP:
 223                         if (move_current_window_in_container(conn, current_client, D_UP))
 224                                 return;
 225
 226                         /* if we’re at the up-most position, move the rest of the table down */
 227                         if (current_row == 0) {
 228                                 expand_table_rows_at_head(c_ws);
 229                                 new = CUR_CELL;
 230                         } else
 231                                 new = CUR_TABLE[current_col][--current_row];
 232                         break;
 233                 case D_DOWN:
 234                         if (move_current_window_in_container(conn, current_client, D_DOWN))
 235                                 return;
 236
 237                         if (current_row == (c_ws->rows-1))
 238                                 expand_table_rows(c_ws);
 239
 240                         new = CUR_TABLE[current_col][++current_row];
 241                         break;
 242         }
 243
 244         /* Remove it from the old container and put it into the new one */
 245         client_remove_from_container(conn, current_client, container, true);
 246
 247         if (new->currently_focused != NULL)
 248                 CIRCLEQ_INSERT_AFTER(&(new->clients), new->currently_focused, current_client, clients);
 249         else CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
 250         SLIST_INSERT_HEAD(&(new->workspace->focus_stack), current_client, focus_clients);
 251
 252         /* Update data structures */
 253         current_client->container = new;
 254         current_client->workspace = new->workspace;
 255         container->currently_focused = to_focus;
 256         new->currently_focused = current_client;
 257
 258         Workspace *workspace = container->workspace;
 259
 260         /* delete all empty columns/rows */
 261         cleanup_table(conn, workspace);
 262
 263         /* Fix colspan/rowspan if it’d overlap */
 264         fix_colrowspan(conn, workspace);
 265
 266         render_workspace(conn, workspace->screen, workspace);
 267         xcb_flush(conn);
 268
 269         set_focus(conn, current_client, true);
 270 }
 271
 272 static void move_current_container(xcb_connection_t *conn, direction_t direction) {
 273         LOG("moving container to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 274                                             (direction == D_LEFT ? "left" : "right"))));
 275         /* Get current window */
 276         Container *container = CUR_CELL,
 277                   *new = NULL;
 278
 279         Container **old = &CUR_CELL;
 280
 281         /* There has to be a container, see focus_window() */
 282         assert(container != NULL);
 283
 284         switch (direction) {
 285                 case D_LEFT:
 286                         /* If we’re at the left-most position, move the rest of the table right */
 287                         if (current_col == 0) {
 288                                 expand_table_cols_at_head(c_ws);
 289                                 new = CUR_CELL;
 290                                 old = &CUR_TABLE[current_col+1][current_row];
 291                         } else
 292                                 new = CUR_TABLE[--current_col][current_row];
 293                         break;
 294                 case D_RIGHT:
 295                         if (current_col == (c_ws->cols-1))
 296                                 expand_table_cols(c_ws);
 297
 298                         new = CUR_TABLE[++current_col][current_row];
 299                         break;
 300                 case D_UP:
 301                         /* if we’re at the up-most position, move the rest of the table down */
 302                         if (current_row == 0) {
 303                                 expand_table_rows_at_head(c_ws);
 304                                 new = CUR_CELL;
 305                                 old = &CUR_TABLE[current_col][current_row+1];
 306                         } else
 307                                 new = CUR_TABLE[current_col][--current_row];
 308                         break;
 309                 case D_DOWN:
 310                         if (current_row == (c_ws->rows-1))
 311                                 expand_table_rows(c_ws);
 312
 313                         new = CUR_TABLE[current_col][++current_row];
 314                         break;
 315         }
 316
 317         LOG("old = %d,%d and new = %d,%d\n", container->col, container->row, new->col, new->row);
 318
 319         /* Swap the containers */
 320         int col = new->col;
 321         int row = new->row;
 322
 323         *old = new;
 324         new->col = container->col;
 325         new->row = container->row;
 326
 327         CUR_CELL = container;
 328         container->col = col;
 329         container->row = row;
 330
 331         Workspace *workspace = container->workspace;
 332
 333         /* delete all empty columns/rows */
 334         cleanup_table(conn, workspace);
 335
 336         /* Fix colspan/rowspan if it’d overlap */
 337         fix_colrowspan(conn, workspace);
 338
 339         render_layout(conn);
 340 }
 341
 342 /*
 343  * "Snaps" the current container (not possible for windows, because it works at table base)
 344  * to the given direction, that is, adjusts cellspan/rowspan
 345  *
 346  */
 347 static void snap_current_container(xcb_connection_t *conn, direction_t direction) {
 348         LOG("snapping container to direction %d\n", direction);
 349
 350         Container *container = CUR_CELL;
 351
 352         assert(container != NULL);
 353
 354         switch (direction) {
 355                 case D_LEFT:
 356                         /* Snap to the left is actually a move to the left and then a snap right */
 357                         if (!cell_exists(container->col - 1, container->row) ||
 358                                 CUR_TABLE[container->col-1][container->row]->currently_focused != NULL) {
 359                                 LOG("cannot snap to left - the cell is already used\n");
 360                                 return;
 361                         }
 362
 363                         move_current_window(conn, D_LEFT);
 364                         snap_current_container(conn, D_RIGHT);
 365                         return;
 366                 case D_RIGHT: {
 367                         /* Check if the cell is used */
 368                         int new_col = container->col + container->colspan;
 369                         if (!cell_exists(new_col, container->row) ||
 370                                 CUR_TABLE[new_col][container->row]->currently_focused != NULL) {
 371                                 LOG("cannot snap to right - the cell is already used\n");
 372                                 return;
 373                         }
 374
 375                         /* Check if there are other cells with rowspan, which are in our way.
 376                          * If so, reduce their rowspan. */
 377                         for (int i = container->row-1; i >= 0; i--) {
 378                                 LOG("we got cell %d, %d with rowspan %d\n",
 379                                                 new_col, i, CUR_TABLE[new_col][i]->rowspan);
 380                                 while ((CUR_TABLE[new_col][i]->rowspan-1) >= (container->row - i))
 381                                         CUR_TABLE[new_col][i]->rowspan--;
 382                                 LOG("new rowspan = %d\n", CUR_TABLE[new_col][i]->rowspan);
 383                         }
 384
 385                         container->colspan++;
 386                         break;
 387                 }
 388                 case D_UP:
 389                         if (!cell_exists(container->col, container->row - 1) ||
 390                                 CUR_TABLE[container->col][container->row-1]->currently_focused != NULL) {
 391                                 LOG("cannot snap to top - the cell is already used\n");
 392                                 return;
 393                         }
 394
 395                         move_current_window(conn, D_UP);
 396                         snap_current_container(conn, D_DOWN);
 397                         return;
 398                 case D_DOWN: {
 399                         LOG("snapping down\n");
 400                         int new_row = container->row + container->rowspan;
 401                         if (!cell_exists(container->col, new_row) ||
 402                                 CUR_TABLE[container->col][new_row]->currently_focused != NULL) {
 403                                 LOG("cannot snap down - the cell is already used\n");
 404                                 return;
 405                         }
 406
 407                         for (int i = container->col-1; i >= 0; i--) {
 408                                 LOG("we got cell %d, %d with colspan %d\n",
 409                                                 i, new_row, CUR_TABLE[i][new_row]->colspan);
 410                                 while ((CUR_TABLE[i][new_row]->colspan-1) >= (container->col - i))
 411                                         CUR_TABLE[i][new_row]->colspan--;
 412                                 LOG("new colspan = %d\n", CUR_TABLE[i][new_row]->colspan);
 413
 414                         }
 415
 416                         container->rowspan++;
 417                         break;
 418                 }
 419         }
 420
 421         render_layout(conn);
 422 }
 423
 424 static void move_floating_window_to_workspace(xcb_connection_t *conn, Client *client, int workspace) {
 425         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 426         Workspace *t_ws = &(workspaces[workspace-1]);
 427
 428         LOG("moving floating\n");
 429
 430         if (t_ws->screen == NULL) {
 431                 LOG("initializing new workspace, setting num to %d\n", workspace-1);
 432                 t_ws->screen = c_ws->screen;
 433                 /* Copy the dimensions from the virtual screen */
 434                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 435         } else {
 436                 /* Check if there is already a fullscreen client on the destination workspace and
 437                  * stop moving if so. */
 438                 if (client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 439                         LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 440                         return;
 441                 }
 442         }
 443
 444         /* Remove from focus stack */
 445         SLIST_REMOVE(&(client->workspace->focus_stack), client, Client, focus_clients);
 446
 447         if (client->workspace->fullscreen_client == client)
 448                 client->workspace->fullscreen_client = NULL;
 449
 450         /* Insert into destination focus stack */
 451         client->workspace = t_ws;
 452         SLIST_INSERT_HEAD(&(t_ws->focus_stack), client, focus_clients);
 453         if (client->fullscreen)
 454                 t_ws->fullscreen_client = client;
 455
 456         /* If we’re moving it to an invisible screen, we need to unmap it */
 457         if (t_ws->screen->current_workspace != t_ws->num) {
 458                 LOG("This workspace is not visible, unmapping\n");
 459                 xcb_unmap_window(conn, client->frame);
 460         }
 461
 462         LOG("done\n");
 463
 464         render_layout(conn);
 465 }
 466
 467 /*
 468  * Moves the currently selected window to the given workspace
 469  *
 470  */
 471 static void move_current_window_to_workspace(xcb_connection_t *conn, int workspace) {
 472         LOG("Moving current window to workspace %d\n", workspace);
 473
 474         Container *container = CUR_CELL;
 475
 476         assert(container != NULL);
 477
 478         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 479         Workspace *t_ws = &(workspaces[workspace-1]);
 480
 481         Client *current_client = container->currently_focused;
 482         if (current_client == NULL) {
 483                 LOG("No currently focused client in current container.\n");
 484                 return;
 485         }
 486         Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 487         if (to_focus == NULL)
 488                 to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 489
 490         if (t_ws->screen == NULL) {
 491                 LOG("initializing new workspace, setting num to %d\n", workspace-1);
 492                 t_ws->screen = container->workspace->screen;
 493                 /* Copy the dimensions from the virtual screen */
 494                 memcpy(&(t_ws->rect), &(container->workspace->screen->rect), sizeof(Rect));
 495         } else {
 496                 /* Check if there is already a fullscreen client on the destination workspace and
 497                  * stop moving if so. */
 498                 if (current_client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 499                         LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 500                         return;
 501                 }
 502         }
 503
 504         Container *to_container = t_ws->table[t_ws->current_col][t_ws->current_row];
 505
 506         assert(to_container != NULL);
 507
 508         client_remove_from_container(conn, current_client, container, true);
 509         if (container->workspace->fullscreen_client == current_client)
 510                 container->workspace->fullscreen_client = NULL;
 511
 512         /* TODO: insert it to the correct position */
 513         CIRCLEQ_INSERT_TAIL(&(to_container->clients), current_client, clients);
 514
 515         SLIST_INSERT_HEAD(&(to_container->workspace->focus_stack), current_client, focus_clients);
 516         if (current_client->fullscreen)
 517                 t_ws->fullscreen_client = current_client;
 518         LOG("Moved.\n");
 519
 520         current_client->container = to_container;
 521         current_client->workspace = to_container->workspace;
 522         container->currently_focused = to_focus;
 523         to_container->currently_focused = current_client;
 524
 525         /* If we’re moving it to an invisible screen, we need to unmap it */
 526         if (to_container->workspace->screen->current_workspace != to_container->workspace->num) {
 527                 LOG("This workspace is not visible, unmapping\n");
 528                 xcb_unmap_window(conn, current_client->frame);
 529         }
 530
 531         /* delete all empty columns/rows */
 532         cleanup_table(conn, container->workspace);
 533
 534         render_layout(conn);
 535 }
 536
 537 /*
 538  * Switches to the given workspace
 539  *
 540  */
 541 void show_workspace(xcb_connection_t *conn, int workspace) {
 542         Client *client;
 543         bool need_warp = false;
 544         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 545         /* t_ws (to workspace) is just a convenience pointer to the workspace we’re switching to */
 546         Workspace *t_ws = &(workspaces[workspace-1]);
 547
 548         LOG("show_workspace(%d)\n", workspace);
 549
 550         /* Store current_row/current_col */
 551         c_ws->current_row = current_row;
 552         c_ws->current_col = current_col;
 553
 554         /* Check if the workspace has not been used yet */
 555         if (t_ws->screen == NULL) {
 556                 LOG("initializing new workspace, setting num to %d\n", workspace);
 557                 t_ws->screen = c_ws->screen;
 558                 /* Copy the dimensions from the virtual screen */
 559                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 560         }
 561
 562         if (c_ws->screen != t_ws->screen) {
 563                 /* We need to switch to the other screen first */
 564                 LOG("moving over to other screen.\n");
 565
 566                 /* Store the old client */
 567                 Client *old_client = CUR_CELL->currently_focused;
 568
 569                 c_ws = &(workspaces[t_ws->screen->current_workspace]);
 570                 current_col = c_ws->current_col;
 571                 current_row = c_ws->current_row;
 572                 if (CUR_CELL->currently_focused != NULL)
 573                         need_warp = true;
 574                 else {
 575                         Rect *dims = &(c_ws->screen->rect);
 576                         xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0,
 577                                          dims->x + (dims->width / 2), dims->y + (dims->height / 2));
 578                 }
 579
 580                 /* Re-decorate the old client, it’s not focused anymore */
 581                 if ((old_client != NULL) && !old_client->dock)
 582                         redecorate_window(conn, old_client);
 583                 else xcb_flush(conn);
 584         }
 585
 586         /* Check if we need to change something or if we’re already there */
 587         if (c_ws->screen->current_workspace == (workspace-1)) {
 588                 Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 589                 if (last_focused != SLIST_END(&(c_ws->focus_stack))) {
 590                         set_focus(conn, last_focused, true);
 591                         if (need_warp) {
 592                                 client_warp_pointer_into(conn, last_focused);
 593                                 xcb_flush(conn);
 594                         }
 595                 }
 596
 597                 return;
 598         }
 599
 600         t_ws->screen->current_workspace = workspace-1;
 601         Workspace *old_workspace = c_ws;
 602         c_ws = &workspaces[workspace-1];
 603
 604         /* Unmap all clients of the old workspace */
 605         unmap_workspace(conn, old_workspace);
 606
 607         current_row = c_ws->current_row;
 608         current_col = c_ws->current_col;
 609         LOG("new current row = %d, current col = %d\n", current_row, current_col);
 610
 611         ignore_enter_notify_forall(conn, c_ws, true);
 612
 613         /* Map all clients on the new workspace */
 614         FOR_TABLE(c_ws)
 615                 CIRCLEQ_FOREACH(client, &(c_ws->table[cols][rows]->clients), clients)
 616                         xcb_map_window(conn, client->frame);
 617
 618         /* Map all floating clients */
 619         SLIST_FOREACH(client, &(c_ws->focus_stack), focus_clients) {
 620                 if (!client->floating)
 621                         continue;
 622
 623                 xcb_map_window(conn, client->frame);
 624         }
 625
 626         /* Map all stack windows, if any */
 627         struct Stack_Window *stack_win;
 628         SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 629                 if (stack_win->container->workspace == c_ws)
 630                         xcb_map_window(conn, stack_win->window);
 631
 632         ignore_enter_notify_forall(conn, c_ws, false);
 633
 634         /* Restore focus on the new workspace */
 635         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 636         if (last_focused != SLIST_END(&(c_ws->focus_stack))) {
 637                 set_focus(conn, last_focused, true);
 638                 if (need_warp) {
 639                         client_warp_pointer_into(conn, last_focused);
 640                         xcb_flush(conn);
 641                 }
 642         } else xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
 643
 644         render_layout(conn);
 645 }
 646
 647 /*
 648  * Jumps to the given window class / title.
 649  * Title is matched using strstr, that is, matches if it appears anywhere
 650  * in the string. Regular expressions seem to be a bit overkill here. However,
 651  * if we need them for something else somewhen, we may introduce them here, too.
 652  *
 653  */
 654 static void jump_to_window(xcb_connection_t *conn, const char *arguments) {
 655         char *classtitle;
 656         Client *client;
 657
 658         /* The first character is a quote, this was checked before */
 659         classtitle = sstrdup(arguments+1);
 660         /* The last character is a quote, we just set it to NULL */
 661         classtitle[strlen(classtitle)-1] = '\0';
 662
 663         if ((client = get_matching_client(conn, classtitle, NULL)) == NULL) {
 664                 free(classtitle);
 665                 LOG("No matching client found.\n");
 666                 return;
 667         }
 668
 669         free(classtitle);
 670         set_focus(conn, client, true);
 671 }
 672
 673 /*
 674  * Jump directly to the specified workspace, row and col.
 675  * Great for reaching windows that you always keep in the same spot (hello irssi, I'm looking at you)
 676  *
 677  */
 678 static void jump_to_container(xcb_connection_t *conn, const char *arguments) {
 679         int ws, row, col;
 680         int result;
 681
 682         result = sscanf(arguments, "%d %d %d", &ws, &col, &row);
 683         LOG("Jump called with %d parameters (\"%s\")\n", result, arguments);
 684
 685         /* No match? Either no arguments were specified, or no numbers */
 686         if (result < 1) {
 687                 LOG("At least one valid argument required\n");
 688                 return;
 689         }
 690
 691         /* Move to the target workspace */
 692         show_workspace(conn, ws);
 693
 694         if (result < 3)
 695                 return;
 696
 697         LOG("Boundary-checking col %d, row %d... (max cols %d, max rows %d)\n", col, row, c_ws->cols, c_ws->rows);
 698
 699         /* Move to row/col */
 700         if (row >= c_ws->rows)
 701                 row = c_ws->rows - 1;
 702         if (col >= c_ws->cols)
 703                 col = c_ws->cols - 1;
 704
 705         LOG("Jumping to col %d, row %d\n", col, row);
 706         if (c_ws->table[col][row]->currently_focused != NULL)
 707                 set_focus(conn, c_ws->table[col][row]->currently_focused, true);
 708 }
 709
 710 /*
 711  * Travels the focus stack by the given number of times (or once, if no argument
 712  * was specified). That is, selects the window you were in before you focused
 713  * the current window.
 714  *
 715  */
 716 static void travel_focus_stack(xcb_connection_t *conn, const char *arguments) {
 717         /* Start count at -1 to always skip the first element */
 718         int times, count = -1;
 719         Client *current;
 720
 721         if (sscanf(arguments, "%u", &times) != 1) {
 722                 LOG("No or invalid argument given (\"%s\"), using default of 1 times\n", arguments);
 723                 times = 1;
 724         }
 725
 726         Workspace *ws = CUR_CELL->workspace;
 727
 728         SLIST_FOREACH(current, &(ws->focus_stack), focus_clients) {
 729                 if (++count < times) {
 730                         LOG("Skipping\n");
 731                         continue;
 732                 }
 733
 734                 LOG("Focussing\n");
 735                 set_focus(conn, current, true);
 736                 break;
 737         }
 738 }
 739
 740 /*
 741  * Goes through the list of arguments (for exec()) and checks if the given argument
 742  * is present. If not, it copies the arguments (because we cannot realloc it) and
 743  * appends the given argument.
 744  *
 745  */
 746 static char **append_argument(char **original, char *argument) {
 747         int num_args;
 748         for (num_args = 0; original[num_args] != NULL; num_args++) {
 749                 LOG("original argument: \"%s\"\n", original[num_args]);
 750                 /* If the argument is already present we return the original pointer */
 751                 if (strcmp(original[num_args], argument) == 0)
 752                         return original;
 753         }
 754         /* Copy the original array */
 755         char **result = smalloc((num_args+2) * sizeof(char*));
 756         memcpy(result, original, num_args * sizeof(char*));
 757         result[num_args] = argument;
 758         result[num_args+1] = NULL;
 759
 760         return result;
 761 }
 762
 763 /*
 764  * Parses a command, see file CMDMODE for more information
 765  *
 766  */
 767 void parse_command(xcb_connection_t *conn, const char *command) {
 768         LOG("--- parsing command \"%s\" ---\n", command);
 769         /* Get the first client from focus stack because floating clients are not
 770          * in any container, therefore CUR_CELL is not appropriate. */
 771         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 772         if (last_focused == SLIST_END(&(c_ws->focus_stack)))
 773                 last_focused = NULL;
 774
 775         /* Hmm, just to be sure */
 776         if (command[0] == '\0')
 777                 return;
 778
 779         /* Is it an <exec>? Then execute the given command. */
 780         if (STARTS_WITH(command, "exec ")) {
 781                 LOG("starting \"%s\"\n", command + strlen("exec "));
 782                 start_application(command+strlen("exec "));
 783                 return;
 784         }
 785
 786         /* Is it an <exit>? */
 787         if (STARTS_WITH(command, "exit")) {
 788                 LOG("User issued exit-command, exiting without error.\n");
 789                 exit(EXIT_SUCCESS);
 790         }
 791
 792         /* Is it <restart>? Then restart in place. */
 793         if (STARTS_WITH(command, "restart")) {
 794                 LOG("restarting \"%s\"...\n", start_argv[0]);
 795                 /* make sure -a is in the argument list or append it */
 796                 start_argv = append_argument(start_argv, "-a");
 797
 798                 execvp(start_argv[0], start_argv);
 799                 /* not reached */
 800         }
 801
 802         if (STARTS_WITH(command, "kill")) {
 803                 if (last_focused == NULL) {
 804                         LOG("There is no window to kill\n");
 805                         return;
 806                 }
 807
 808                 LOG("Killing current window\n");
 809                 client_kill(conn, last_focused);
 810                 return;
 811         }
 812
 813         /* Is it a jump to a specified workspace, row, col? */
 814         if (STARTS_WITH(command, "jump ")) {
 815                 const char *arguments = command + strlen("jump ");
 816                 if (arguments[0] == '"')
 817                         jump_to_window(conn, arguments);
 818                 else jump_to_container(conn, arguments);
 819                 return;
 820         }
 821
 822         /* Should we travel the focus stack? */
 823         if (STARTS_WITH(command, "focus")) {
 824                 const char *arguments = command + strlen("focus");
 825                 travel_focus_stack(conn, arguments);
 826                 return;
 827         }
 828
 829         /* Is it 'f' for fullscreen? */
 830         if (command[0] == 'f') {
 831                 if (last_focused == NULL)
 832                         return;
 833                 client_toggle_fullscreen(conn, last_focused);
 834                 return;
 835         }
 836
 837         /* Is it just 's' for stacking or 'd' for default? */
 838         if ((command[0] == 's' || command[0] == 'd') && (command[1] == '\0')) {
 839                 if (last_focused == NULL || last_focused->floating) {
 840                         LOG("not switching, this is a floating client\n");
 841                         return;
 842                 }
 843                 LOG("Switching mode for current container\n");
 844                 switch_layout_mode(conn, CUR_CELL, (command[0] == 's' ? MODE_STACK : MODE_DEFAULT));
 845                 return;
 846         }
 847
 848         /* Is it 't' for toggle tiling/floating? */
 849         if (command[0] == 't') {
 850                 if (last_focused == NULL) {
 851                         LOG("Cannot toggle tiling/floating: workspace empty\n");
 852                         return;
 853                 }
 854
 855                 toggle_floating_mode(conn, last_focused);
 856                 /* delete all empty columns/rows */
 857                 cleanup_table(conn, last_focused->workspace);
 858
 859                 /* Fix colspan/rowspan if it’d overlap */
 860                 fix_colrowspan(conn, last_focused->workspace);
 861
 862                 render_workspace(conn, last_focused->workspace->screen, last_focused->workspace);
 863                 xcb_flush(conn);
 864                 return;
 865         }
 866
 867         enum { WITH_WINDOW, WITH_CONTAINER } with = WITH_WINDOW;
 868
 869         /* Is it a <with>? */
 870         if (command[0] == 'w') {
 871                 command++;
 872                 /* TODO: implement */
 873                 if (command[0] == 'c') {
 874                         with = WITH_CONTAINER;
 875                         command++;
 876                 } else {
 877                         LOG("not yet implemented.\n");
 878                         return;
 879                 }
 880         }
 881
 882         /* It’s a normal <cmd> */
 883         char *rest = NULL;
 884         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
 885         direction_t direction;
 886         int times = strtol(command, &rest, 10);
 887         if (rest == NULL) {
 888                 LOG("Invalid command (\"%s\")\n", command);
 889                 return;
 890         }
 891
 892         if (*rest == '\0') {
 893                 /* No rest? This was a tag number, not a times specification */
 894                 show_workspace(conn, times);
 895                 return;
 896         }
 897
 898         if (*rest == 'm' || *rest == 's') {
 899                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
 900                 rest++;
 901         }
 902
 903         int workspace = strtol(rest, &rest, 10);
 904
 905         if (rest == NULL) {
 906                 LOG("Invalid command (\"%s\")\n", command);
 907                 return;
 908         }
 909
 910         if (*rest == '\0') {
 911                 if (last_focused != NULL && last_focused->floating)
 912                         move_floating_window_to_workspace(conn, last_focused, workspace);
 913                 else move_current_window_to_workspace(conn, workspace);
 914                 return;
 915         }
 916
 917         if (last_focused == NULL || last_focused->floating) {
 918                 LOG("Not performing (null or floating) \n");
 919                 return;
 920         }
 921
 922         /* Now perform action to <where> */
 923         while (*rest != '\0') {
 924                 if (*rest == 'h')
 925                         direction = D_LEFT;
 926                 else if (*rest == 'j')
 927                         direction = D_DOWN;
 928                 else if (*rest == 'k')
 929                         direction = D_UP;
 930                 else if (*rest == 'l')
 931                         direction = D_RIGHT;
 932                 else {
 933                         LOG("unknown direction: %c\n", *rest);
 934                         return;
 935                 }
 936
 937                 if (action == ACTION_FOCUS)
 938                         focus_thing(conn, direction, (with == WITH_WINDOW ? THING_WINDOW : THING_CONTAINER));
 939                 else if (action == ACTION_MOVE) {
 940                         if (with == WITH_WINDOW)
 941                                 move_current_window(conn, direction);
 942                         else move_current_container(conn, direction);
 943                 }
 944                 else if (action == ACTION_SNAP)
 945                         snap_current_container(conn, direction);
 946
 947                 rest++;
 948         }
 949
 950         LOG("--- done ---\n");
 951 }