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                 /* To make static analyzers happy: */
 243                 default:
 244                         return;
 245         }
 246
 247         /* Remove it from the old container and put it into the new one */
 248         client_remove_from_container(conn, current_client, container, true);
 249
 250         if (new->currently_focused != NULL)
 251                 CIRCLEQ_INSERT_AFTER(&(new->clients), new->currently_focused, current_client, clients);
 252         else CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
 253         SLIST_INSERT_HEAD(&(new->workspace->focus_stack), current_client, focus_clients);
 254
 255         /* Update data structures */
 256         current_client->container = new;
 257         current_client->workspace = new->workspace;
 258         container->currently_focused = to_focus;
 259         new->currently_focused = current_client;
 260
 261         Workspace *workspace = container->workspace;
 262
 263         /* delete all empty columns/rows */
 264         cleanup_table(conn, workspace);
 265
 266         /* Fix colspan/rowspan if it’d overlap */
 267         fix_colrowspan(conn, workspace);
 268
 269         render_workspace(conn, workspace->screen, workspace);
 270         xcb_flush(conn);
 271
 272         set_focus(conn, current_client, true);
 273 }
 274
 275 static void move_current_container(xcb_connection_t *conn, direction_t direction) {
 276         LOG("moving container to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 277                                             (direction == D_LEFT ? "left" : "right"))));
 278         /* Get current window */
 279         Container *container = CUR_CELL,
 280                   *new = NULL;
 281
 282         Container **old = &CUR_CELL;
 283
 284         /* There has to be a container, see focus_window() */
 285         assert(container != NULL);
 286
 287         switch (direction) {
 288                 case D_LEFT:
 289                         /* If we’re at the left-most position, move the rest of the table right */
 290                         if (current_col == 0) {
 291                                 expand_table_cols_at_head(c_ws);
 292                                 new = CUR_CELL;
 293                                 old = &CUR_TABLE[current_col+1][current_row];
 294                         } else
 295                                 new = CUR_TABLE[--current_col][current_row];
 296                         break;
 297                 case D_RIGHT:
 298                         if (current_col == (c_ws->cols-1))
 299                                 expand_table_cols(c_ws);
 300
 301                         new = CUR_TABLE[++current_col][current_row];
 302                         break;
 303                 case D_UP:
 304                         /* if we’re at the up-most position, move the rest of the table down */
 305                         if (current_row == 0) {
 306                                 expand_table_rows_at_head(c_ws);
 307                                 new = CUR_CELL;
 308                                 old = &CUR_TABLE[current_col][current_row+1];
 309                         } else
 310                                 new = CUR_TABLE[current_col][--current_row];
 311                         break;
 312                 case D_DOWN:
 313                         if (current_row == (c_ws->rows-1))
 314                                 expand_table_rows(c_ws);
 315
 316                         new = CUR_TABLE[current_col][++current_row];
 317                         break;
 318                 /* To make static analyzers happy: */
 319                 default:
 320                         return;
 321         }
 322
 323         LOG("old = %d,%d and new = %d,%d\n", container->col, container->row, new->col, new->row);
 324
 325         /* Swap the containers */
 326         int col = new->col;
 327         int row = new->row;
 328
 329         *old = new;
 330         new->col = container->col;
 331         new->row = container->row;
 332
 333         CUR_CELL = container;
 334         container->col = col;
 335         container->row = row;
 336
 337         Workspace *workspace = container->workspace;
 338
 339         /* delete all empty columns/rows */
 340         cleanup_table(conn, workspace);
 341
 342         /* Fix colspan/rowspan if it’d overlap */
 343         fix_colrowspan(conn, workspace);
 344
 345         render_layout(conn);
 346 }
 347
 348 /*
 349  * "Snaps" the current container (not possible for windows, because it works at table base)
 350  * to the given direction, that is, adjusts cellspan/rowspan
 351  *
 352  */
 353 static void snap_current_container(xcb_connection_t *conn, direction_t direction) {
 354         LOG("snapping container to direction %d\n", direction);
 355
 356         Container *container = CUR_CELL;
 357
 358         assert(container != NULL);
 359
 360         switch (direction) {
 361                 case D_LEFT:
 362                         /* Snap to the left is actually a move to the left and then a snap right */
 363                         if (!cell_exists(container->col - 1, container->row) ||
 364                             CUR_TABLE[container->col-1][container->row]->currently_focused != NULL) {
 365                                 LOG("cannot snap to left - the cell is already used\n");
 366                                 return;
 367                         }
 368
 369                         move_current_window(conn, D_LEFT);
 370                         snap_current_container(conn, D_RIGHT);
 371                         return;
 372                 case D_RIGHT: {
 373                         /* Check if the cell is used */
 374                         int new_col = container->col + container->colspan;
 375                         for (int i = 0; i < container->rowspan; i++)
 376                                 if (!cell_exists(new_col, container->row + i) ||
 377                                     CUR_TABLE[new_col][container->row + i]->currently_focused != NULL) {
 378                                         LOG("cannot snap to right - the cell is already used\n");
 379                                         return;
 380                                 }
 381
 382                         /* Check if there are other cells with rowspan, which are in our way.
 383                          * If so, reduce their rowspan. */
 384                         for (int i = container->row-1; i >= 0; i--) {
 385                                 LOG("we got cell %d, %d with rowspan %d\n",
 386                                                 new_col, i, CUR_TABLE[new_col][i]->rowspan);
 387                                 while ((CUR_TABLE[new_col][i]->rowspan-1) >= (container->row - i))
 388                                         CUR_TABLE[new_col][i]->rowspan--;
 389                                 LOG("new rowspan = %d\n", CUR_TABLE[new_col][i]->rowspan);
 390                         }
 391
 392                         container->colspan++;
 393                         break;
 394                 }
 395                 case D_UP:
 396                         if (!cell_exists(container->col, container->row - 1) ||
 397                             CUR_TABLE[container->col][container->row-1]->currently_focused != NULL) {
 398                                 LOG("cannot snap to top - the cell is already used\n");
 399                                 return;
 400                         }
 401
 402                         move_current_window(conn, D_UP);
 403                         snap_current_container(conn, D_DOWN);
 404                         return;
 405                 case D_DOWN: {
 406                         LOG("snapping down\n");
 407                         int new_row = container->row + container->rowspan;
 408                         for (int i = 0; i < container->colspan; i++)
 409                                 if (!cell_exists(container->col + i, new_row) ||
 410                                     CUR_TABLE[container->col + i][new_row]->currently_focused != NULL) {
 411                                         LOG("cannot snap down - the cell is already used\n");
 412                                         return;
 413                                 }
 414
 415                         for (int i = container->col-1; i >= 0; i--) {
 416                                 LOG("we got cell %d, %d with colspan %d\n",
 417                                                 i, new_row, CUR_TABLE[i][new_row]->colspan);
 418                                 while ((CUR_TABLE[i][new_row]->colspan-1) >= (container->col - i))
 419                                         CUR_TABLE[i][new_row]->colspan--;
 420                                 LOG("new colspan = %d\n", CUR_TABLE[i][new_row]->colspan);
 421
 422                         }
 423
 424                         container->rowspan++;
 425                         break;
 426                 }
 427                 /* To make static analyzers happy: */
 428                 default:
 429                         return;
 430         }
 431
 432         render_layout(conn);
 433 }
 434
 435 static void move_floating_window_to_workspace(xcb_connection_t *conn, Client *client, int workspace) {
 436         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 437         Workspace *t_ws = &(workspaces[workspace-1]);
 438
 439         LOG("moving floating\n");
 440
 441         if (t_ws->screen == NULL) {
 442                 LOG("initializing new workspace, setting num to %d\n", workspace-1);
 443                 t_ws->screen = c_ws->screen;
 444                 /* Copy the dimensions from the virtual screen */
 445                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 446         } else {
 447                 /* Check if there is already a fullscreen client on the destination workspace and
 448                  * stop moving if so. */
 449                 if (client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 450                         LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 451                         return;
 452                 }
 453         }
 454
 455         /* Remove from focus stack */
 456         SLIST_REMOVE(&(client->workspace->focus_stack), client, Client, focus_clients);
 457
 458         if (client->workspace->fullscreen_client == client)
 459                 client->workspace->fullscreen_client = NULL;
 460
 461         /* Insert into destination focus stack */
 462         client->workspace = t_ws;
 463         SLIST_INSERT_HEAD(&(t_ws->focus_stack), client, focus_clients);
 464         if (client->fullscreen)
 465                 t_ws->fullscreen_client = client;
 466
 467         /* If we’re moving it to an invisible screen, we need to unmap it */
 468         if (t_ws->screen->current_workspace != t_ws->num) {
 469                 LOG("This workspace is not visible, unmapping\n");
 470                 xcb_unmap_window(conn, client->frame);
 471         }
 472
 473         LOG("done\n");
 474
 475         render_layout(conn);
 476 }
 477
 478 /*
 479  * Moves the currently selected window to the given workspace
 480  *
 481  */
 482 static void move_current_window_to_workspace(xcb_connection_t *conn, int workspace) {
 483         LOG("Moving current window to workspace %d\n", workspace);
 484
 485         Container *container = CUR_CELL;
 486
 487         assert(container != NULL);
 488
 489         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 490         Workspace *t_ws = &(workspaces[workspace-1]);
 491
 492         Client *current_client = container->currently_focused;
 493         if (current_client == NULL) {
 494                 LOG("No currently focused client in current container.\n");
 495                 return;
 496         }
 497         Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 498         if (to_focus == NULL)
 499                 to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 500
 501         if (t_ws->screen == NULL) {
 502                 LOG("initializing new workspace, setting num to %d\n", workspace-1);
 503                 t_ws->screen = container->workspace->screen;
 504                 /* Copy the dimensions from the virtual screen */
 505                 memcpy(&(t_ws->rect), &(container->workspace->screen->rect), sizeof(Rect));
 506         } else {
 507                 /* Check if there is already a fullscreen client on the destination workspace and
 508                  * stop moving if so. */
 509                 if (current_client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 510                         LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 511                         return;
 512                 }
 513         }
 514
 515         Container *to_container = t_ws->table[t_ws->current_col][t_ws->current_row];
 516
 517         assert(to_container != NULL);
 518
 519         client_remove_from_container(conn, current_client, container, true);
 520         if (container->workspace->fullscreen_client == current_client)
 521                 container->workspace->fullscreen_client = NULL;
 522
 523         /* TODO: insert it to the correct position */
 524         CIRCLEQ_INSERT_TAIL(&(to_container->clients), current_client, clients);
 525
 526         SLIST_INSERT_HEAD(&(to_container->workspace->focus_stack), current_client, focus_clients);
 527         if (current_client->fullscreen)
 528                 t_ws->fullscreen_client = current_client;
 529         LOG("Moved.\n");
 530
 531         current_client->container = to_container;
 532         current_client->workspace = to_container->workspace;
 533         container->currently_focused = to_focus;
 534         to_container->currently_focused = current_client;
 535
 536         /* If we’re moving it to an invisible screen, we need to unmap it */
 537         if (to_container->workspace->screen->current_workspace != to_container->workspace->num) {
 538                 LOG("This workspace is not visible, unmapping\n");
 539                 xcb_unmap_window(conn, current_client->frame);
 540         }
 541
 542         /* delete all empty columns/rows */
 543         cleanup_table(conn, container->workspace);
 544
 545         render_layout(conn);
 546 }
 547
 548 /*
 549  * Switches to the given workspace
 550  *
 551  */
 552 void show_workspace(xcb_connection_t *conn, int workspace) {
 553         Client *client;
 554         bool need_warp = false;
 555         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 556         /* t_ws (to workspace) is just a convenience pointer to the workspace we’re switching to */
 557         Workspace *t_ws = &(workspaces[workspace-1]);
 558
 559         LOG("show_workspace(%d)\n", workspace);
 560
 561         /* Store current_row/current_col */
 562         c_ws->current_row = current_row;
 563         c_ws->current_col = current_col;
 564
 565         /* Check if the workspace has not been used yet */
 566         if (t_ws->screen == NULL) {
 567                 LOG("initializing new workspace, setting num to %d\n", workspace);
 568                 t_ws->screen = c_ws->screen;
 569                 /* Copy the dimensions from the virtual screen */
 570                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 571         }
 572
 573         if (c_ws->screen != t_ws->screen) {
 574                 /* We need to switch to the other screen first */
 575                 LOG("moving over to other screen.\n");
 576
 577                 /* Store the old client */
 578                 Client *old_client = CUR_CELL->currently_focused;
 579
 580                 c_ws = &(workspaces[t_ws->screen->current_workspace]);
 581                 current_col = c_ws->current_col;
 582                 current_row = c_ws->current_row;
 583                 if (CUR_CELL->currently_focused != NULL)
 584                         need_warp = true;
 585                 else {
 586                         Rect *dims = &(c_ws->screen->rect);
 587                         xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0,
 588                                          dims->x + (dims->width / 2), dims->y + (dims->height / 2));
 589                 }
 590
 591                 /* Re-decorate the old client, it’s not focused anymore */
 592                 if ((old_client != NULL) && !old_client->dock)
 593                         redecorate_window(conn, old_client);
 594                 else xcb_flush(conn);
 595         }
 596
 597         /* Check if we need to change something or if we’re already there */
 598         if (c_ws->screen->current_workspace == (workspace-1)) {
 599                 Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 600                 if (last_focused != SLIST_END(&(c_ws->focus_stack))) {
 601                         set_focus(conn, last_focused, true);
 602                         if (need_warp) {
 603                                 client_warp_pointer_into(conn, last_focused);
 604                                 xcb_flush(conn);
 605                         }
 606                 }
 607
 608                 return;
 609         }
 610
 611         t_ws->screen->current_workspace = workspace-1;
 612         Workspace *old_workspace = c_ws;
 613         c_ws = &workspaces[workspace-1];
 614
 615         /* Unmap all clients of the old workspace */
 616         unmap_workspace(conn, old_workspace);
 617
 618         current_row = c_ws->current_row;
 619         current_col = c_ws->current_col;
 620         LOG("new current row = %d, current col = %d\n", current_row, current_col);
 621
 622         ignore_enter_notify_forall(conn, c_ws, true);
 623
 624         /* Map all clients on the new workspace */
 625         FOR_TABLE(c_ws)
 626                 CIRCLEQ_FOREACH(client, &(c_ws->table[cols][rows]->clients), clients)
 627                         xcb_map_window(conn, client->frame);
 628
 629         /* Map all floating clients */
 630         if (!c_ws->floating_hidden)
 631                 TAILQ_FOREACH(client, &(c_ws->floating_clients), floating_clients)
 632                         xcb_map_window(conn, client->frame);
 633
 634         /* Map all stack windows, if any */
 635         struct Stack_Window *stack_win;
 636         SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 637                 if (stack_win->container->workspace == c_ws)
 638                         xcb_map_window(conn, stack_win->window);
 639
 640         ignore_enter_notify_forall(conn, c_ws, false);
 641
 642         /* Restore focus on the new workspace */
 643         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 644         if (last_focused != SLIST_END(&(c_ws->focus_stack))) {
 645                 set_focus(conn, last_focused, true);
 646                 if (need_warp) {
 647                         client_warp_pointer_into(conn, last_focused);
 648                         xcb_flush(conn);
 649                 }
 650         } else xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
 651
 652         render_layout(conn);
 653 }
 654
 655 /*
 656  * Jumps to the given window class / title.
 657  * Title is matched using strstr, that is, matches if it appears anywhere
 658  * in the string. Regular expressions seem to be a bit overkill here. However,
 659  * if we need them for something else somewhen, we may introduce them here, too.
 660  *
 661  */
 662 static void jump_to_window(xcb_connection_t *conn, const char *arguments) {
 663         char *classtitle;
 664         Client *client;
 665
 666         /* The first character is a quote, this was checked before */
 667         classtitle = sstrdup(arguments+1);
 668         /* The last character is a quote, we just set it to NULL */
 669         classtitle[strlen(classtitle)-1] = '\0';
 670
 671         if ((client = get_matching_client(conn, classtitle, NULL)) == NULL) {
 672                 free(classtitle);
 673                 LOG("No matching client found.\n");
 674                 return;
 675         }
 676
 677         free(classtitle);
 678         set_focus(conn, client, true);
 679 }
 680
 681 /*
 682  * Jump directly to the specified workspace, row and col.
 683  * Great for reaching windows that you always keep in the same spot (hello irssi, I'm looking at you)
 684  *
 685  */
 686 static void jump_to_container(xcb_connection_t *conn, const char *arguments) {
 687         int ws, row, col;
 688         int result;
 689
 690         result = sscanf(arguments, "%d %d %d", &ws, &col, &row);
 691         LOG("Jump called with %d parameters (\"%s\")\n", result, arguments);
 692
 693         /* No match? Either no arguments were specified, or no numbers */
 694         if (result < 1) {
 695                 LOG("At least one valid argument required\n");
 696                 return;
 697         }
 698
 699         /* Move to the target workspace */
 700         show_workspace(conn, ws);
 701
 702         if (result < 3)
 703                 return;
 704
 705         LOG("Boundary-checking col %d, row %d... (max cols %d, max rows %d)\n", col, row, c_ws->cols, c_ws->rows);
 706
 707         /* Move to row/col */
 708         if (row >= c_ws->rows)
 709                 row = c_ws->rows - 1;
 710         if (col >= c_ws->cols)
 711                 col = c_ws->cols - 1;
 712
 713         LOG("Jumping to col %d, row %d\n", col, row);
 714         if (c_ws->table[col][row]->currently_focused != NULL)
 715                 set_focus(conn, c_ws->table[col][row]->currently_focused, true);
 716 }
 717
 718 /*
 719  * Travels the focus stack by the given number of times (or once, if no argument
 720  * was specified). That is, selects the window you were in before you focused
 721  * the current window.
 722  *
 723  * The special values 'floating' (select the next floating window), 'tiling'
 724  * (select the next tiling window), 'ft' (if the current window is floating,
 725  * select the next tiling window and vice-versa) are also valid
 726  *
 727  */
 728 static void travel_focus_stack(xcb_connection_t *conn, const char *arguments) {
 729         /* Start count at -1 to always skip the first element */
 730         int times, count = -1;
 731         Client *current;
 732         bool floating_criteria;
 733
 734         /* Either it’s one of the special values… */
 735         if (strcasecmp(arguments, "floating") == 0) {
 736                 floating_criteria = true;
 737         } else if (strcasecmp(arguments, "tiling") == 0) {
 738                 floating_criteria = false;
 739         } else if (strcasecmp(arguments, "ft") == 0) {
 740                 Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 741                 if (last_focused == SLIST_END(&(c_ws->focus_stack))) {
 742                         LOG("Cannot select the next floating/tiling client because there is no client at all\n");
 743                         return;
 744                 }
 745
 746                 floating_criteria = !client_is_floating(last_focused);
 747         } else {
 748                 /* …or a number was specified */
 749                 if (sscanf(arguments, "%u", &times) != 1) {
 750                         LOG("No or invalid argument given (\"%s\"), using default of 1 times\n", arguments);
 751                         times = 1;
 752                 }
 753
 754                 SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients) {
 755                         if (++count < times) {
 756                                 LOG("Skipping\n");
 757                                 continue;
 758                         }
 759
 760                         LOG("Focussing\n");
 761                         set_focus(conn, current, true);
 762                         break;
 763                 }
 764                 return;
 765         }
 766
 767         /* Select the next client matching the criteria parsed above */
 768         SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients)
 769                 if (client_is_floating(current) == floating_criteria) {
 770                         set_focus(conn, current, true);
 771                         break;
 772                 }
 773 }
 774
 775 /*
 776  * Goes through the list of arguments (for exec()) and checks if the given argument
 777  * is present. If not, it copies the arguments (because we cannot realloc it) and
 778  * appends the given argument.
 779  *
 780  */
 781 static char **append_argument(char **original, char *argument) {
 782         int num_args;
 783         for (num_args = 0; original[num_args] != NULL; num_args++) {
 784                 LOG("original argument: \"%s\"\n", original[num_args]);
 785                 /* If the argument is already present we return the original pointer */
 786                 if (strcmp(original[num_args], argument) == 0)
 787                         return original;
 788         }
 789         /* Copy the original array */
 790         char **result = smalloc((num_args+2) * sizeof(char*));
 791         memcpy(result, original, num_args * sizeof(char*));
 792         result[num_args] = argument;
 793         result[num_args+1] = NULL;
 794
 795         return result;
 796 }
 797
 798 /*
 799  * Parses a command, see file CMDMODE for more information
 800  *
 801  */
 802 void parse_command(xcb_connection_t *conn, const char *command) {
 803         LOG("--- parsing command \"%s\" ---\n", command);
 804         /* Get the first client from focus stack because floating clients are not
 805          * in any container, therefore CUR_CELL is not appropriate. */
 806         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 807         if (last_focused == SLIST_END(&(c_ws->focus_stack)))
 808                 last_focused = NULL;
 809
 810         /* Hmm, just to be sure */
 811         if (command[0] == '\0')
 812                 return;
 813
 814         /* Is it an <exec>? Then execute the given command. */
 815         if (STARTS_WITH(command, "exec ")) {
 816                 LOG("starting \"%s\"\n", command + strlen("exec "));
 817                 start_application(command+strlen("exec "));
 818                 return;
 819         }
 820
 821         /* Is it an <exit>? */
 822         if (STARTS_WITH(command, "exit")) {
 823                 LOG("User issued exit-command, exiting without error.\n");
 824                 exit(EXIT_SUCCESS);
 825         }
 826
 827         /* Is it <restart>? Then restart in place. */
 828         if (STARTS_WITH(command, "restart")) {
 829                 LOG("restarting \"%s\"...\n", start_argv[0]);
 830                 /* make sure -a is in the argument list or append it */
 831                 start_argv = append_argument(start_argv, "-a");
 832
 833                 execvp(start_argv[0], start_argv);
 834                 /* not reached */
 835         }
 836
 837         if (STARTS_WITH(command, "kill")) {
 838                 if (last_focused == NULL) {
 839                         LOG("There is no window to kill\n");
 840                         return;
 841                 }
 842
 843                 LOG("Killing current window\n");
 844                 client_kill(conn, last_focused);
 845                 return;
 846         }
 847
 848         /* Is it a jump to a specified workspace, row, col? */
 849         if (STARTS_WITH(command, "jump ")) {
 850                 const char *arguments = command + strlen("jump ");
 851                 if (arguments[0] == '"')
 852                         jump_to_window(conn, arguments);
 853                 else jump_to_container(conn, arguments);
 854                 return;
 855         }
 856
 857         /* Should we travel the focus stack? */
 858         if (STARTS_WITH(command, "focus")) {
 859                 const char *arguments = command + strlen("focus ");
 860                 travel_focus_stack(conn, arguments);
 861                 return;
 862         }
 863
 864         /* Is it 'f' for fullscreen? */
 865         if (command[0] == 'f') {
 866                 if (last_focused == NULL)
 867                         return;
 868                 client_toggle_fullscreen(conn, last_focused);
 869                 return;
 870         }
 871
 872         /* Is it just 's' for stacking or 'd' for default? */
 873         if ((command[0] == 's' || command[0] == 'd') && (command[1] == '\0')) {
 874                 if (last_focused == NULL || client_is_floating(last_focused)) {
 875                         LOG("not switching, this is a floating client\n");
 876                         return;
 877                 }
 878                 LOG("Switching mode for current container\n");
 879                 switch_layout_mode(conn, CUR_CELL, (command[0] == 's' ? MODE_STACK : MODE_DEFAULT));
 880                 return;
 881         }
 882
 883         if (command[0] == 'H') {
 884                 LOG("Hiding all floating windows\n");
 885                 floating_toggle_hide(conn, c_ws);
 886                 return;
 887         }
 888
 889         enum { WITH_WINDOW, WITH_CONTAINER, WITH_WORKSPACE } with = WITH_WINDOW;
 890
 891         /* Is it a <with>? */
 892         if (command[0] == 'w') {
 893                 command++;
 894                 /* TODO: implement */
 895                 if (command[0] == 'c') {
 896                         with = WITH_CONTAINER;
 897                         command++;
 898                 } else if (command[0] == 'w') {
 899                         with = WITH_WORKSPACE;
 900                         command++;
 901                 } else {
 902                         LOG("not yet implemented.\n");
 903                         return;
 904                 }
 905         }
 906
 907         /* Is it 't' for toggle tiling/floating? */
 908         if (command[0] == 't') {
 909                 if (with == WITH_WORKSPACE) {
 910                         c_ws->auto_float = !c_ws->auto_float;
 911                         LOG("autofloat is now %d\n", c_ws->auto_float);
 912                         return;
 913                 }
 914                 if (last_focused == NULL) {
 915                         LOG("Cannot toggle tiling/floating: workspace empty\n");
 916                         return;
 917                 }
 918
 919                 toggle_floating_mode(conn, last_focused, false);
 920                 /* delete all empty columns/rows */
 921                 cleanup_table(conn, last_focused->workspace);
 922
 923                 /* Fix colspan/rowspan if it’d overlap */
 924                 fix_colrowspan(conn, last_focused->workspace);
 925
 926                 render_workspace(conn, last_focused->workspace->screen, last_focused->workspace);
 927                 xcb_flush(conn);
 928                 return;
 929         }
 930
 931         /* It’s a normal <cmd> */
 932         char *rest = NULL;
 933         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
 934         direction_t direction;
 935         int times = strtol(command, &rest, 10);
 936         if (rest == NULL) {
 937                 LOG("Invalid command (\"%s\")\n", command);
 938                 return;
 939         }
 940
 941         if (*rest == '\0') {
 942                 /* No rest? This was a workspace number, not a times specification */
 943                 show_workspace(conn, times);
 944                 return;
 945         }
 946
 947         if (*rest == 'm' || *rest == 's') {
 948                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
 949                 rest++;
 950         }
 951
 952         int workspace = strtol(rest, &rest, 10);
 953
 954         if (rest == NULL) {
 955                 LOG("Invalid command (\"%s\")\n", command);
 956                 return;
 957         }
 958
 959         if (*rest == '\0') {
 960                 if (last_focused != NULL && client_is_floating(last_focused))
 961                         move_floating_window_to_workspace(conn, last_focused, workspace);
 962                 else move_current_window_to_workspace(conn, workspace);
 963                 return;
 964         }
 965
 966         if (last_focused == NULL) {
 967                 LOG("Not performing (no window found)\n");
 968                 return;
 969         }
 970
 971         if (client_is_floating(last_focused) &&
 972             (action != ACTION_FOCUS && action != ACTION_MOVE)) {
 973                 LOG("Not performing (floating)\n");
 974                 return;
 975         }
 976
 977         /* Now perform action to <where> */
 978         while (*rest != '\0') {
 979                 if (*rest == 'h')
 980                         direction = D_LEFT;
 981                 else if (*rest == 'j')
 982                         direction = D_DOWN;
 983                 else if (*rest == 'k')
 984                         direction = D_UP;
 985                 else if (*rest == 'l')
 986                         direction = D_RIGHT;
 987                 else {
 988                         LOG("unknown direction: %c\n", *rest);
 989                         return;
 990                 }
 991                 rest++;
 992
 993                 if (action == ACTION_FOCUS) {
 994                         if (client_is_floating(last_focused)) {
 995                                 floating_focus_direction(conn, last_focused, direction);
 996                                 continue;
 997                         }
 998                         focus_thing(conn, direction, (with == WITH_WINDOW ? THING_WINDOW : THING_CONTAINER));
 999                         continue;
1000                 }
1001
1002                 if (action == ACTION_MOVE) {
1003                         if (client_is_floating(last_focused)) {
1004                                 floating_move(conn, last_focused, direction);
1005                                 continue;
1006                         }
1007                         if (with == WITH_WINDOW)
1008                                 move_current_window(conn, direction);
1009                         else move_current_container(conn, direction);
1010                         continue;
1011                 }
1012
1013                 if (action == ACTION_SNAP) {
1014                         snap_current_container(conn, direction);
1015                         continue;
1016                 }
1017         }
1018
1019         LOG("--- done ---\n");
1020 }