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);
 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);
 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                 if (CUR_CELL->currently_focused != NULL) {
 589                         set_focus(conn, CUR_CELL->currently_focused, true);
 590                         if (need_warp) {
 591                                 client_warp_pointer_into(conn, CUR_CELL->currently_focused);
 592                                 xcb_flush(conn);
 593                         }
 594                 }
 595                 return;
 596         }
 597
 598         t_ws->screen->current_workspace = workspace-1;
 599         Workspace *old_workspace = c_ws;
 600         c_ws = &workspaces[workspace-1];
 601
 602         /* Unmap all clients of the old workspace */
 603         unmap_workspace(conn, old_workspace);
 604
 605         current_row = c_ws->current_row;
 606         current_col = c_ws->current_col;
 607         LOG("new current row = %d, current col = %d\n", current_row, current_col);
 608
 609         ignore_enter_notify_forall(conn, c_ws, true);
 610
 611         /* Map all clients on the new workspace */
 612         FOR_TABLE(c_ws)
 613                 CIRCLEQ_FOREACH(client, &(c_ws->table[cols][rows]->clients), clients)
 614                         xcb_map_window(conn, client->frame);
 615
 616         /* Map all floating clients */
 617         SLIST_FOREACH(client, &(c_ws->focus_stack), focus_clients) {
 618                 if (!client->floating)
 619                         continue;
 620
 621                 xcb_map_window(conn, client->frame);
 622         }
 623
 624         /* Map all stack windows, if any */
 625         struct Stack_Window *stack_win;
 626         SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 627                 if (stack_win->container->workspace == c_ws)
 628                         xcb_map_window(conn, stack_win->window);
 629
 630         ignore_enter_notify_forall(conn, c_ws, false);
 631
 632         /* Restore focus on the new workspace */
 633         if (CUR_CELL->currently_focused != NULL) {
 634                 set_focus(conn, CUR_CELL->currently_focused, true);
 635                 if (need_warp) {
 636                         client_warp_pointer_into(conn, CUR_CELL->currently_focused);
 637                         xcb_flush(conn);
 638                 }
 639         } else xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
 640
 641         render_layout(conn);
 642 }
 643
 644 /*
 645  * Jumps to the given window class / title.
 646  * Title is matched using strstr, that is, matches if it appears anywhere
 647  * in the string. Regular expressions seem to be a bit overkill here. However,
 648  * if we need them for something else somewhen, we may introduce them here, too.
 649  *
 650  */
 651 static void jump_to_window(xcb_connection_t *conn, const char *arguments) {
 652         char *classtitle;
 653         Client *client;
 654
 655         /* The first character is a quote, this was checked before */
 656         classtitle = sstrdup(arguments+1);
 657         /* The last character is a quote, we just set it to NULL */
 658         classtitle[strlen(classtitle)-1] = '\0';
 659
 660         if ((client = get_matching_client(conn, classtitle, NULL)) == NULL) {
 661                 free(classtitle);
 662                 LOG("No matching client found.\n");
 663                 return;
 664         }
 665
 666         free(classtitle);
 667         set_focus(conn, client, true);
 668 }
 669
 670 /*
 671  * Jump directly to the specified workspace, row and col.
 672  * Great for reaching windows that you always keep in the same spot (hello irssi, I'm looking at you)
 673  *
 674  */
 675 static void jump_to_container(xcb_connection_t *conn, const char *arguments) {
 676         int ws, row, col;
 677         int result;
 678
 679         result = sscanf(arguments, "%d %d %d", &ws, &col, &row);
 680         LOG("Jump called with %d parameters (\"%s\")\n", result, arguments);
 681
 682         /* No match? Either no arguments were specified, or no numbers */
 683         if (result < 1) {
 684                 LOG("At least one valid argument required\n");
 685                 return;
 686         }
 687
 688         /* Move to the target workspace */
 689         show_workspace(conn, ws);
 690
 691         if (result < 3)
 692                 return;
 693
 694         LOG("Boundary-checking col %d, row %d... (max cols %d, max rows %d)\n", col, row, c_ws->cols, c_ws->rows);
 695
 696         /* Move to row/col */
 697         if (row >= c_ws->rows)
 698                 row = c_ws->rows - 1;
 699         if (col >= c_ws->cols)
 700                 col = c_ws->cols - 1;
 701
 702         LOG("Jumping to col %d, row %d\n", col, row);
 703         if (c_ws->table[col][row]->currently_focused != NULL)
 704                 set_focus(conn, c_ws->table[col][row]->currently_focused, true);
 705 }
 706
 707 /*
 708  * Travels the focus stack by the given number of times (or once, if no argument
 709  * was specified). That is, selects the window you were in before you focused
 710  * the current window.
 711  *
 712  */
 713 static void travel_focus_stack(xcb_connection_t *conn, const char *arguments) {
 714         /* Start count at -1 to always skip the first element */
 715         int times, count = -1;
 716         Client *current;
 717
 718         if (sscanf(arguments, "%u", &times) != 1) {
 719                 LOG("No or invalid argument given (\"%s\"), using default of 1 times\n", arguments);
 720                 times = 1;
 721         }
 722
 723         Workspace *ws = CUR_CELL->workspace;
 724
 725         SLIST_FOREACH(current, &(ws->focus_stack), focus_clients) {
 726                 if (++count < times) {
 727                         LOG("Skipping\n");
 728                         continue;
 729                 }
 730
 731                 LOG("Focussing\n");
 732                 set_focus(conn, current, true);
 733                 break;
 734         }
 735 }
 736
 737 /*
 738  * Goes through the list of arguments (for exec()) and checks if the given argument
 739  * is present. If not, it copies the arguments (because we cannot realloc it) and
 740  * appends the given argument.
 741  *
 742  */
 743 static char **append_argument(char **original, char *argument) {
 744         int num_args;
 745         for (num_args = 0; original[num_args] != NULL; num_args++) {
 746                 LOG("original argument: \"%s\"\n", original[num_args]);
 747                 /* If the argument is already present we return the original pointer */
 748                 if (strcmp(original[num_args], argument) == 0)
 749                         return original;
 750         }
 751         /* Copy the original array */
 752         char **result = smalloc((num_args+2) * sizeof(char*));
 753         memcpy(result, original, num_args * sizeof(char*));
 754         result[num_args] = argument;
 755         result[num_args+1] = NULL;
 756
 757         return result;
 758 }
 759
 760 /*
 761  * Parses a command, see file CMDMODE for more information
 762  *
 763  */
 764 void parse_command(xcb_connection_t *conn, const char *command) {
 765         LOG("--- parsing command \"%s\" ---\n", command);
 766         /* Get the first client from focus stack because floating clients are not
 767          * in any container, therefore CUR_CELL is not appropriate. */
 768         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 769         if (last_focused == SLIST_END(&(c_ws->focus_stack)))
 770                 last_focused = NULL;
 771
 772         /* Hmm, just to be sure */
 773         if (command[0] == '\0')
 774                 return;
 775
 776         /* Is it an <exec>? Then execute the given command. */
 777         if (STARTS_WITH(command, "exec ")) {
 778                 LOG("starting \"%s\"\n", command + strlen("exec "));
 779                 start_application(command+strlen("exec "));
 780                 return;
 781         }
 782
 783         /* Is it an <exit>? */
 784         if (STARTS_WITH(command, "exit")) {
 785                 LOG("User issued exit-command, exiting without error.\n");
 786                 exit(EXIT_SUCCESS);
 787         }
 788
 789         /* Is it <restart>? Then restart in place. */
 790         if (STARTS_WITH(command, "restart")) {
 791                 LOG("restarting \"%s\"...\n", start_argv[0]);
 792                 /* make sure -a is in the argument list or append it */
 793                 start_argv = append_argument(start_argv, "-a");
 794
 795                 execvp(start_argv[0], start_argv);
 796                 /* not reached */
 797         }
 798
 799         if (STARTS_WITH(command, "kill")) {
 800                 if (last_focused == NULL) {
 801                         LOG("There is no window to kill\n");
 802                         return;
 803                 }
 804
 805                 LOG("Killing current window\n");
 806                 client_kill(conn, last_focused);
 807                 return;
 808         }
 809
 810         /* Is it a jump to a specified workspace, row, col? */
 811         if (STARTS_WITH(command, "jump ")) {
 812                 const char *arguments = command + strlen("jump ");
 813                 if (arguments[0] == '"')
 814                         jump_to_window(conn, arguments);
 815                 else jump_to_container(conn, arguments);
 816                 return;
 817         }
 818
 819         /* Should we travel the focus stack? */
 820         if (STARTS_WITH(command, "focus")) {
 821                 const char *arguments = command + strlen("focus");
 822                 travel_focus_stack(conn, arguments);
 823                 return;
 824         }
 825
 826         /* Is it 'f' for fullscreen? */
 827         if (command[0] == 'f') {
 828                 if (last_focused == NULL)
 829                         return;
 830                 client_toggle_fullscreen(conn, last_focused);
 831                 return;
 832         }
 833
 834         /* Is it just 's' for stacking or 'd' for default? */
 835         if ((command[0] == 's' || command[0] == 'd') && (command[1] == '\0')) {
 836                 if (last_focused == NULL || last_focused->floating) {
 837                         LOG("not switching, this is a floating client\n");
 838                         return;
 839                 }
 840                 LOG("Switching mode for current container\n");
 841                 switch_layout_mode(conn, CUR_CELL, (command[0] == 's' ? MODE_STACK : MODE_DEFAULT));
 842                 return;
 843         }
 844
 845         /* Is it 't' for toggle tiling/floating? */
 846         if (command[0] == 't') {
 847                 if (last_focused == NULL) {
 848                         LOG("Cannot toggle tiling/floating: workspace empty\n");
 849                         return;
 850                 }
 851
 852                 toggle_floating_mode(conn, last_focused);
 853                 /* delete all empty columns/rows */
 854                 cleanup_table(conn, last_focused->workspace);
 855
 856                 /* Fix colspan/rowspan if it’d overlap */
 857                 fix_colrowspan(conn, last_focused->workspace);
 858
 859                 render_workspace(conn, last_focused->workspace->screen, last_focused->workspace);
 860                 xcb_flush(conn);
 861                 return;
 862         }
 863
 864         enum { WITH_WINDOW, WITH_CONTAINER } with = WITH_WINDOW;
 865
 866         /* Is it a <with>? */
 867         if (command[0] == 'w') {
 868                 command++;
 869                 /* TODO: implement */
 870                 if (command[0] == 'c') {
 871                         with = WITH_CONTAINER;
 872                         command++;
 873                 } else {
 874                         LOG("not yet implemented.\n");
 875                         return;
 876                 }
 877         }
 878
 879         /* It’s a normal <cmd> */
 880         char *rest = NULL;
 881         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
 882         direction_t direction;
 883         int times = strtol(command, &rest, 10);
 884         if (rest == NULL) {
 885                 LOG("Invalid command (\"%s\")\n", command);
 886                 return;
 887         }
 888
 889         if (*rest == '\0') {
 890                 /* No rest? This was a tag number, not a times specification */
 891                 show_workspace(conn, times);
 892                 return;
 893         }
 894
 895         if (*rest == 'm' || *rest == 's') {
 896                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
 897                 rest++;
 898         }
 899
 900         int workspace = strtol(rest, &rest, 10);
 901
 902         if (rest == NULL) {
 903                 LOG("Invalid command (\"%s\")\n", command);
 904                 return;
 905         }
 906
 907         if (*rest == '\0') {
 908                 if (last_focused != NULL && last_focused->floating)
 909                         move_floating_window_to_workspace(conn, last_focused, workspace);
 910                 else move_current_window_to_workspace(conn, workspace);
 911                 return;
 912         }
 913
 914         if (last_focused == NULL || last_focused->floating) {
 915                 LOG("Not performing (null or floating) \n");
 916                 return;
 917         }
 918
 919         /* Now perform action to <where> */
 920         while (*rest != '\0') {
 921                 if (*rest == 'h')
 922                         direction = D_LEFT;
 923                 else if (*rest == 'j')
 924                         direction = D_DOWN;
 925                 else if (*rest == 'k')
 926                         direction = D_UP;
 927                 else if (*rest == 'l')
 928                         direction = D_RIGHT;
 929                 else {
 930                         LOG("unknown direction: %c\n", *rest);
 931                         return;
 932                 }
 933
 934                 if (action == ACTION_FOCUS)
 935                         focus_thing(conn, direction, (with == WITH_WINDOW ? THING_WINDOW : THING_CONTAINER));
 936                 else if (action == ACTION_MOVE) {
 937                         if (with == WITH_WINDOW)
 938                                 move_current_window(conn, direction);
 939                         else move_current_container(conn, direction);
 940                 }
 941                 else if (action == ACTION_SNAP)
 942                         snap_current_container(conn, direction);
 943
 944                 rest++;
 945         }
 946
 947         LOG("--- done ---\n");
 948 }