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
 109                 LOG("new_col = %d, new_row = %d\n", new_col, new_row);
 110                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
 111                         LOG("Cell empty, checking for colspanned client above...\n");
 112                         for (int cols = 0; cols < new_col; cols += t_ws->table[cols][new_row]->colspan) {
 113                                 if (new_col > (cols + (t_ws->table[cols][new_row]->colspan - 1)))
 114                                         continue;
 115
 116                                 new_col = cols;
 117                                 break;
 118                         }
 119                         LOG("Fixed it to new col %d\n", new_col);
 120                 }
 121         } else if (direction == D_LEFT || direction == D_RIGHT) {
 122                 if (direction == D_RIGHT && cell_exists(current_col+1, current_row))
 123                         new_col = current_col + t_ws->table[current_col][current_row]->colspan;
 124                 else if (direction == D_LEFT && cell_exists(current_col-1, current_row)) {
 125                         /* Set new_col as a sane default, but it may get overwritten in a second */
 126                         new_col--;
 127
 128                         /* Search from the left to correctly handle colspanned containers */
 129                         for (int cols = 0; cols < current_col; cols += t_ws->table[cols][current_row]->colspan) {
 130                                 if (new_col > (cols + (t_ws->table[cols][current_row]->colspan - 1)))
 131                                         continue;
 132
 133                                 new_col = cols;
 134                                 break;
 135                         }
 136                 } else {
 137                         /* Let’s see if there is a screen left/right here to which we can switch */
 138                         LOG("container is at %d with width %d\n", container->x, container->width);
 139                         i3Screen *screen;
 140                         int destination_x = (direction == D_LEFT ? (container->x - 1) : (container->x + container->width + 1));
 141                         if ((screen = get_screen_containing(destination_x, container->y)) == NULL) {
 142                                 LOG("Wrapping screen around horizontally\n");
 143                                 screen = get_screen_most((direction == D_LEFT ? D_RIGHT : D_LEFT));
 144                         }
 145                         t_ws = &(workspaces[screen->current_workspace]);
 146                         new_col = (direction == D_LEFT ? (t_ws->cols - 1) : 0);
 147                 }
 148
 149                 LOG("new_col = %d, new_row = %d\n", new_col, new_row);
 150                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
 151                         LOG("Cell empty, checking for rowspanned client above...\n");
 152                         for (int rows = 0; rows < new_row; rows += t_ws->table[new_col][rows]->rowspan) {
 153                                 if (new_row > (rows + (t_ws->table[new_col][rows]->rowspan - 1)))
 154                                         continue;
 155
 156                                 new_row = rows;
 157                                 break;
 158                         }
 159                         LOG("Fixed it to new row %d\n", new_row);
 160                 }
 161         } else {
 162                 LOG("direction unhandled\n");
 163                 return;
 164         }
 165
 166         /* Bounds checking */
 167         if (new_col >= t_ws->cols)
 168                 new_col = (t_ws->cols - 1);
 169         if (new_row >= t_ws->rows)
 170                 new_row = (t_ws->rows - 1);
 171
 172         if (t_ws->table[new_col][new_row]->currently_focused != NULL)
 173                 set_focus(conn, t_ws->table[new_col][new_row]->currently_focused, true);
 174 }
 175
 176 /*
 177  * Tries to move the window inside its current container.
 178  *
 179  * Returns true if the window could be moved, false otherwise.
 180  *
 181  */
 182 static bool move_current_window_in_container(xcb_connection_t *conn, Client *client,
 183                 direction_t direction) {
 184         assert(client->container != NULL);
 185
 186         Client *other = (direction == D_UP ? CIRCLEQ_PREV(client, clients) :
 187                                              CIRCLEQ_NEXT(client, clients));
 188
 189         if (other == CIRCLEQ_END(&(client->container->clients)))
 190                 return false;
 191
 192         LOG("i can do that\n");
 193         /* We can move the client inside its current container */
 194         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 195         if (direction == D_UP)
 196                 CIRCLEQ_INSERT_BEFORE(&(client->container->clients), other, client, clients);
 197         else CIRCLEQ_INSERT_AFTER(&(client->container->clients), other, client, clients);
 198         render_layout(conn);
 199         return true;
 200 }
 201
 202 /*
 203  * Moves the current window or whole container to the given direction, creating a column/row if
 204  * necessary.
 205  *
 206  */
 207 static void move_current_window(xcb_connection_t *conn, direction_t direction) {
 208         LOG("moving window to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 209                                             (direction == D_LEFT ? "left" : "right"))));
 210         /* Get current window */
 211         Container *container = CUR_CELL,
 212                   *new = NULL;
 213
 214         /* There has to be a container, see focus_window() */
 215         assert(container != NULL);
 216
 217         /* If there is no window or the dock window is focused, we’re done */
 218         if (container->currently_focused == NULL ||
 219             container->currently_focused->dock)
 220                 return;
 221
 222         /* As soon as the client is moved away, the last focused client in the old
 223          * container needs to get focus, if any. Therefore, we save it here. */
 224         Client *current_client = container->currently_focused;
 225         Client *to_focus = get_last_focused_client(conn, container, current_client);
 226
 227         if (to_focus == NULL) {
 228                 to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 229                 if (to_focus == NULL)
 230                         to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 231         }
 232
 233         switch (direction) {
 234                 case D_LEFT:
 235                         /* If we’re at the left-most position, move the rest of the table right */
 236                         if (current_col == 0) {
 237                                 expand_table_cols_at_head(c_ws);
 238                                 new = CUR_CELL;
 239                         } else
 240                                 new = CUR_TABLE[--current_col][current_row];
 241                         break;
 242                 case D_RIGHT:
 243                         if (current_col == (c_ws->cols-1))
 244                                 expand_table_cols(c_ws);
 245
 246                         new = CUR_TABLE[++current_col][current_row];
 247                         break;
 248                 case D_UP:
 249                         if (move_current_window_in_container(conn, current_client, D_UP))
 250                                 return;
 251
 252                         /* if we’re at the up-most position, move the rest of the table down */
 253                         if (current_row == 0) {
 254                                 expand_table_rows_at_head(c_ws);
 255                                 new = CUR_CELL;
 256                         } else
 257                                 new = CUR_TABLE[current_col][--current_row];
 258                         break;
 259                 case D_DOWN:
 260                         if (move_current_window_in_container(conn, current_client, D_DOWN))
 261                                 return;
 262
 263                         if (current_row == (c_ws->rows-1))
 264                                 expand_table_rows(c_ws);
 265
 266                         new = CUR_TABLE[current_col][++current_row];
 267                         break;
 268                 /* To make static analyzers happy: */
 269                 default:
 270                         return;
 271         }
 272
 273         /* Remove it from the old container and put it into the new one */
 274         client_remove_from_container(conn, current_client, container, true);
 275
 276         if (new->currently_focused != NULL)
 277                 CIRCLEQ_INSERT_AFTER(&(new->clients), new->currently_focused, current_client, clients);
 278         else CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
 279         SLIST_INSERT_HEAD(&(new->workspace->focus_stack), current_client, focus_clients);
 280
 281         /* Update data structures */
 282         current_client->container = new;
 283         current_client->workspace = new->workspace;
 284         container->currently_focused = to_focus;
 285         new->currently_focused = current_client;
 286
 287         Workspace *workspace = container->workspace;
 288
 289         /* delete all empty columns/rows */
 290         cleanup_table(conn, workspace);
 291
 292         /* Fix colspan/rowspan if it’d overlap */
 293         fix_colrowspan(conn, workspace);
 294
 295         render_workspace(conn, workspace->screen, workspace);
 296         xcb_flush(conn);
 297
 298         set_focus(conn, current_client, true);
 299 }
 300
 301 static void move_current_container(xcb_connection_t *conn, direction_t direction) {
 302         LOG("moving container to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 303                                             (direction == D_LEFT ? "left" : "right"))));
 304         /* Get current window */
 305         Container *container = CUR_CELL,
 306                   *new = NULL;
 307
 308         Container **old = &CUR_CELL;
 309
 310         /* There has to be a container, see focus_window() */
 311         assert(container != NULL);
 312
 313         switch (direction) {
 314                 case D_LEFT:
 315                         /* If we’re at the left-most position, move the rest of the table right */
 316                         if (current_col == 0) {
 317                                 expand_table_cols_at_head(c_ws);
 318                                 new = CUR_CELL;
 319                                 old = &CUR_TABLE[current_col+1][current_row];
 320                         } else
 321                                 new = CUR_TABLE[--current_col][current_row];
 322                         break;
 323                 case D_RIGHT:
 324                         if (current_col == (c_ws->cols-1))
 325                                 expand_table_cols(c_ws);
 326
 327                         new = CUR_TABLE[++current_col][current_row];
 328                         break;
 329                 case D_UP:
 330                         /* if we’re at the up-most position, move the rest of the table down */
 331                         if (current_row == 0) {
 332                                 expand_table_rows_at_head(c_ws);
 333                                 new = CUR_CELL;
 334                                 old = &CUR_TABLE[current_col][current_row+1];
 335                         } else
 336                                 new = CUR_TABLE[current_col][--current_row];
 337                         break;
 338                 case D_DOWN:
 339                         if (current_row == (c_ws->rows-1))
 340                                 expand_table_rows(c_ws);
 341
 342                         new = CUR_TABLE[current_col][++current_row];
 343                         break;
 344                 /* To make static analyzers happy: */
 345                 default:
 346                         return;
 347         }
 348
 349         LOG("old = %d,%d and new = %d,%d\n", container->col, container->row, new->col, new->row);
 350
 351         /* Swap the containers */
 352         int col = new->col;
 353         int row = new->row;
 354
 355         *old = new;
 356         new->col = container->col;
 357         new->row = container->row;
 358
 359         CUR_CELL = container;
 360         container->col = col;
 361         container->row = row;
 362
 363         Workspace *workspace = container->workspace;
 364
 365         /* delete all empty columns/rows */
 366         cleanup_table(conn, workspace);
 367
 368         /* Fix colspan/rowspan if it’d overlap */
 369         fix_colrowspan(conn, workspace);
 370
 371         render_layout(conn);
 372 }
 373
 374 /*
 375  * "Snaps" the current container (not possible for windows, because it works at table base)
 376  * to the given direction, that is, adjusts cellspan/rowspan
 377  *
 378  */
 379 static void snap_current_container(xcb_connection_t *conn, direction_t direction) {
 380         LOG("snapping container to direction %d\n", direction);
 381
 382         Container *container = CUR_CELL;
 383
 384         assert(container != NULL);
 385
 386         switch (direction) {
 387                 case D_LEFT:
 388                         /* Snap to the left is actually a move to the left and then a snap right */
 389                         if (!cell_exists(container->col - 1, container->row) ||
 390                             CUR_TABLE[container->col-1][container->row]->currently_focused != NULL) {
 391                                 LOG("cannot snap to left - the cell is already used\n");
 392                                 return;
 393                         }
 394
 395                         move_current_window(conn, D_LEFT);
 396                         snap_current_container(conn, D_RIGHT);
 397                         return;
 398                 case D_RIGHT: {
 399                         /* Check if the cell is used */
 400                         int new_col = container->col + container->colspan;
 401                         for (int i = 0; i < container->rowspan; i++)
 402                                 if (!cell_exists(new_col, container->row + i) ||
 403                                     CUR_TABLE[new_col][container->row + i]->currently_focused != NULL) {
 404                                         LOG("cannot snap to right - the cell is already used\n");
 405                                         return;
 406                                 }
 407
 408                         /* Check if there are other cells with rowspan, which are in our way.
 409                          * If so, reduce their rowspan. */
 410                         for (int i = container->row-1; i >= 0; i--) {
 411                                 LOG("we got cell %d, %d with rowspan %d\n",
 412                                                 new_col, i, CUR_TABLE[new_col][i]->rowspan);
 413                                 while ((CUR_TABLE[new_col][i]->rowspan-1) >= (container->row - i))
 414                                         CUR_TABLE[new_col][i]->rowspan--;
 415                                 LOG("new rowspan = %d\n", CUR_TABLE[new_col][i]->rowspan);
 416                         }
 417
 418                         container->colspan++;
 419                         break;
 420                 }
 421                 case D_UP:
 422                         if (!cell_exists(container->col, container->row - 1) ||
 423                             CUR_TABLE[container->col][container->row-1]->currently_focused != NULL) {
 424                                 LOG("cannot snap to top - the cell is already used\n");
 425                                 return;
 426                         }
 427
 428                         move_current_window(conn, D_UP);
 429                         snap_current_container(conn, D_DOWN);
 430                         return;
 431                 case D_DOWN: {
 432                         LOG("snapping down\n");
 433                         int new_row = container->row + container->rowspan;
 434                         for (int i = 0; i < container->colspan; i++)
 435                                 if (!cell_exists(container->col + i, new_row) ||
 436                                     CUR_TABLE[container->col + i][new_row]->currently_focused != NULL) {
 437                                         LOG("cannot snap down - the cell is already used\n");
 438                                         return;
 439                                 }
 440
 441                         for (int i = container->col-1; i >= 0; i--) {
 442                                 LOG("we got cell %d, %d with colspan %d\n",
 443                                                 i, new_row, CUR_TABLE[i][new_row]->colspan);
 444                                 while ((CUR_TABLE[i][new_row]->colspan-1) >= (container->col - i))
 445                                         CUR_TABLE[i][new_row]->colspan--;
 446                                 LOG("new colspan = %d\n", CUR_TABLE[i][new_row]->colspan);
 447
 448                         }
 449
 450                         container->rowspan++;
 451                         break;
 452                 }
 453                 /* To make static analyzers happy: */
 454                 default:
 455                         return;
 456         }
 457
 458         render_layout(conn);
 459 }
 460
 461 static void move_floating_window_to_workspace(xcb_connection_t *conn, Client *client, int workspace) {
 462         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 463         Workspace *t_ws = &(workspaces[workspace-1]),
 464                   *old_ws = client->workspace;
 465
 466         LOG("moving floating\n");
 467
 468         if (t_ws->screen == NULL) {
 469                 LOG("initializing new workspace, setting num to %d\n", workspace-1);
 470                 t_ws->screen = c_ws->screen;
 471                 /* Copy the dimensions from the virtual screen */
 472                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 473         } else {
 474                 /* Check if there is already a fullscreen client on the destination workspace and
 475                  * stop moving if so. */
 476                 if (client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 477                         LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 478                         return;
 479                 }
 480         }
 481
 482         floating_assign_to_workspace(client, t_ws);
 483
 484         /* If we’re moving it to an invisible screen, we need to unmap it */
 485         if (t_ws->screen->current_workspace != t_ws->num) {
 486                 LOG("This workspace is not visible, unmapping\n");
 487                 xcb_unmap_window(conn, client->frame);
 488         } else {
 489                 /* If this is not the case, we move the window to a workspace
 490                  * which is on another screen, so we also need to adjust its
 491                  * coordinates. */
 492                 LOG("before x = %d, y = %d\n", client->rect.x, client->rect.y);
 493                 uint32_t relative_x = client->rect.x - old_ws->rect.x,
 494                          relative_y = client->rect.y - old_ws->rect.y;
 495                 LOG("rel_x = %d, rel_y = %d\n", relative_x, relative_y);
 496                 client->rect.x = t_ws->rect.x + relative_x;
 497                 client->rect.y = t_ws->rect.y + relative_y;
 498                 LOG("after x = %d, y = %d\n", client->rect.x, client->rect.y);
 499                 reposition_client(conn, client);
 500                 xcb_flush(conn);
 501         }
 502
 503         LOG("done\n");
 504
 505         render_layout(conn);
 506
 507         set_focus(conn, client, true);
 508 }
 509
 510 /*
 511  * Moves the currently selected window to the given workspace
 512  *
 513  */
 514 static void move_current_window_to_workspace(xcb_connection_t *conn, int workspace) {
 515         LOG("Moving current window to workspace %d\n", workspace);
 516
 517         Container *container = CUR_CELL;
 518
 519         assert(container != NULL);
 520
 521         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 522         Workspace *t_ws = &(workspaces[workspace-1]);
 523
 524         Client *current_client = container->currently_focused;
 525         if (current_client == NULL) {
 526                 LOG("No currently focused client in current container.\n");
 527                 return;
 528         }
 529         Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 530         if (to_focus == NULL)
 531                 to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 532
 533         if (t_ws->screen == NULL) {
 534                 LOG("initializing new workspace, setting num to %d\n", workspace-1);
 535                 t_ws->screen = container->workspace->screen;
 536                 /* Copy the dimensions from the virtual screen */
 537                 memcpy(&(t_ws->rect), &(container->workspace->screen->rect), sizeof(Rect));
 538         } else {
 539                 /* Check if there is already a fullscreen client on the destination workspace and
 540                  * stop moving if so. */
 541                 if (current_client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 542                         LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 543                         return;
 544                 }
 545         }
 546
 547         Container *to_container = t_ws->table[t_ws->current_col][t_ws->current_row];
 548
 549         assert(to_container != NULL);
 550
 551         client_remove_from_container(conn, current_client, container, true);
 552         if (container->workspace->fullscreen_client == current_client)
 553                 container->workspace->fullscreen_client = NULL;
 554
 555         /* TODO: insert it to the correct position */
 556         CIRCLEQ_INSERT_TAIL(&(to_container->clients), current_client, clients);
 557
 558         SLIST_INSERT_HEAD(&(to_container->workspace->focus_stack), current_client, focus_clients);
 559         if (current_client->fullscreen)
 560                 t_ws->fullscreen_client = current_client;
 561         LOG("Moved.\n");
 562
 563         current_client->container = to_container;
 564         current_client->workspace = to_container->workspace;
 565         container->currently_focused = to_focus;
 566         to_container->currently_focused = current_client;
 567
 568         /* If we’re moving it to an invisible screen, we need to unmap it */
 569         if (to_container->workspace->screen->current_workspace != to_container->workspace->num) {
 570                 LOG("This workspace is not visible, unmapping\n");
 571                 xcb_unmap_window(conn, current_client->frame);
 572         }
 573
 574         /* delete all empty columns/rows */
 575         cleanup_table(conn, container->workspace);
 576
 577         render_layout(conn);
 578 }
 579
 580 /*
 581  * Switches to the given workspace
 582  *
 583  */
 584 void show_workspace(xcb_connection_t *conn, int workspace) {
 585         Client *client;
 586         bool need_warp = false;
 587         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 588         /* t_ws (to workspace) is just a convenience pointer to the workspace we’re switching to */
 589         Workspace *t_ws = &(workspaces[workspace-1]);
 590
 591         LOG("show_workspace(%d)\n", workspace);
 592
 593         /* Store current_row/current_col */
 594         c_ws->current_row = current_row;
 595         c_ws->current_col = current_col;
 596
 597         /* Check if the workspace has not been used yet */
 598         if (t_ws->screen == NULL) {
 599                 LOG("initializing new workspace, setting num to %d\n", workspace);
 600                 t_ws->screen = c_ws->screen;
 601                 /* Copy the dimensions from the virtual screen */
 602                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 603         }
 604
 605         if (c_ws->screen != t_ws->screen) {
 606                 /* We need to switch to the other screen first */
 607                 LOG("moving over to other screen.\n");
 608
 609                 /* Store the old client */
 610                 Client *old_client = CUR_CELL->currently_focused;
 611
 612                 c_ws = &(workspaces[t_ws->screen->current_workspace]);
 613                 current_col = c_ws->current_col;
 614                 current_row = c_ws->current_row;
 615                 if (CUR_CELL->currently_focused != NULL)
 616                         need_warp = true;
 617                 else {
 618                         Rect *dims = &(c_ws->screen->rect);
 619                         xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0,
 620                                          dims->x + (dims->width / 2), dims->y + (dims->height / 2));
 621                 }
 622
 623                 /* Re-decorate the old client, it’s not focused anymore */
 624                 if ((old_client != NULL) && !old_client->dock)
 625                         redecorate_window(conn, old_client);
 626                 else xcb_flush(conn);
 627         }
 628
 629         /* Check if we need to change something or if we’re already there */
 630         if (c_ws->screen->current_workspace == (workspace-1)) {
 631                 Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 632                 if (last_focused != SLIST_END(&(c_ws->focus_stack))) {
 633                         set_focus(conn, last_focused, true);
 634                         if (need_warp) {
 635                                 client_warp_pointer_into(conn, last_focused);
 636                                 xcb_flush(conn);
 637                         }
 638                 }
 639
 640                 return;
 641         }
 642
 643         t_ws->screen->current_workspace = workspace-1;
 644         Workspace *old_workspace = c_ws;
 645         c_ws = &workspaces[workspace-1];
 646
 647         /* Unmap all clients of the old workspace */
 648         unmap_workspace(conn, old_workspace);
 649
 650         current_row = c_ws->current_row;
 651         current_col = c_ws->current_col;
 652         LOG("new current row = %d, current col = %d\n", current_row, current_col);
 653
 654         ignore_enter_notify_forall(conn, c_ws, true);
 655
 656         /* Map all clients on the new workspace */
 657         FOR_TABLE(c_ws)
 658                 CIRCLEQ_FOREACH(client, &(c_ws->table[cols][rows]->clients), clients)
 659                         xcb_map_window(conn, client->frame);
 660
 661         /* Map all floating clients */
 662         if (!c_ws->floating_hidden)
 663                 TAILQ_FOREACH(client, &(c_ws->floating_clients), floating_clients)
 664                         xcb_map_window(conn, client->frame);
 665
 666         /* Map all stack windows, if any */
 667         struct Stack_Window *stack_win;
 668         SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 669                 if (stack_win->container->workspace == c_ws)
 670                         xcb_map_window(conn, stack_win->window);
 671
 672         ignore_enter_notify_forall(conn, c_ws, false);
 673
 674         /* Restore focus on the new workspace */
 675         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 676         if (last_focused != SLIST_END(&(c_ws->focus_stack))) {
 677                 set_focus(conn, last_focused, true);
 678                 if (need_warp) {
 679                         client_warp_pointer_into(conn, last_focused);
 680                         xcb_flush(conn);
 681                 }
 682         } else xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
 683
 684         render_layout(conn);
 685 }
 686
 687 /*
 688  * Jumps to the given window class / title.
 689  * Title is matched using strstr, that is, matches if it appears anywhere
 690  * in the string. Regular expressions seem to be a bit overkill here. However,
 691  * if we need them for something else somewhen, we may introduce them here, too.
 692  *
 693  */
 694 static void jump_to_window(xcb_connection_t *conn, const char *arguments) {
 695         char *classtitle;
 696         Client *client;
 697
 698         /* The first character is a quote, this was checked before */
 699         classtitle = sstrdup(arguments+1);
 700         /* The last character is a quote, we just set it to NULL */
 701         classtitle[strlen(classtitle)-1] = '\0';
 702
 703         if ((client = get_matching_client(conn, classtitle, NULL)) == NULL) {
 704                 free(classtitle);
 705                 LOG("No matching client found.\n");
 706                 return;
 707         }
 708
 709         free(classtitle);
 710         set_focus(conn, client, true);
 711 }
 712
 713 /*
 714  * Jump directly to the specified workspace, row and col.
 715  * Great for reaching windows that you always keep in the same spot (hello irssi, I'm looking at you)
 716  *
 717  */
 718 static void jump_to_container(xcb_connection_t *conn, const char *arguments) {
 719         int ws, row, col;
 720         int result;
 721
 722         result = sscanf(arguments, "%d %d %d", &ws, &col, &row);
 723         LOG("Jump called with %d parameters (\"%s\")\n", result, arguments);
 724
 725         /* No match? Either no arguments were specified, or no numbers */
 726         if (result < 1) {
 727                 LOG("At least one valid argument required\n");
 728                 return;
 729         }
 730
 731         /* Move to the target workspace */
 732         show_workspace(conn, ws);
 733
 734         if (result < 3)
 735                 return;
 736
 737         LOG("Boundary-checking col %d, row %d... (max cols %d, max rows %d)\n", col, row, c_ws->cols, c_ws->rows);
 738
 739         /* Move to row/col */
 740         if (row >= c_ws->rows)
 741                 row = c_ws->rows - 1;
 742         if (col >= c_ws->cols)
 743                 col = c_ws->cols - 1;
 744
 745         LOG("Jumping to col %d, row %d\n", col, row);
 746         if (c_ws->table[col][row]->currently_focused != NULL)
 747                 set_focus(conn, c_ws->table[col][row]->currently_focused, true);
 748 }
 749
 750 /*
 751  * Travels the focus stack by the given number of times (or once, if no argument
 752  * was specified). That is, selects the window you were in before you focused
 753  * the current window.
 754  *
 755  * The special values 'floating' (select the next floating window), 'tiling'
 756  * (select the next tiling window), 'ft' (if the current window is floating,
 757  * select the next tiling window and vice-versa) are also valid
 758  *
 759  */
 760 static void travel_focus_stack(xcb_connection_t *conn, const char *arguments) {
 761         /* Start count at -1 to always skip the first element */
 762         int times, count = -1;
 763         Client *current;
 764         bool floating_criteria;
 765
 766         /* Either it’s one of the special values… */
 767         if (strcasecmp(arguments, "floating") == 0) {
 768                 floating_criteria = true;
 769         } else if (strcasecmp(arguments, "tiling") == 0) {
 770                 floating_criteria = false;
 771         } else if (strcasecmp(arguments, "ft") == 0) {
 772                 Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 773                 if (last_focused == SLIST_END(&(c_ws->focus_stack))) {
 774                         LOG("Cannot select the next floating/tiling client because there is no client at all\n");
 775                         return;
 776                 }
 777
 778                 floating_criteria = !client_is_floating(last_focused);
 779         } else {
 780                 /* …or a number was specified */
 781                 if (sscanf(arguments, "%u", &times) != 1) {
 782                         LOG("No or invalid argument given (\"%s\"), using default of 1 times\n", arguments);
 783                         times = 1;
 784                 }
 785
 786                 SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients) {
 787                         if (++count < times) {
 788                                 LOG("Skipping\n");
 789                                 continue;
 790                         }
 791
 792                         LOG("Focussing\n");
 793                         set_focus(conn, current, true);
 794                         break;
 795                 }
 796                 return;
 797         }
 798
 799         /* Select the next client matching the criteria parsed above */
 800         SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients)
 801                 if (client_is_floating(current) == floating_criteria) {
 802                         set_focus(conn, current, true);
 803                         break;
 804                 }
 805 }
 806
 807 /*
 808  * Goes through the list of arguments (for exec()) and checks if the given argument
 809  * is present. If not, it copies the arguments (because we cannot realloc it) and
 810  * appends the given argument.
 811  *
 812  */
 813 static char **append_argument(char **original, char *argument) {
 814         int num_args;
 815         for (num_args = 0; original[num_args] != NULL; num_args++) {
 816                 LOG("original argument: \"%s\"\n", original[num_args]);
 817                 /* If the argument is already present we return the original pointer */
 818                 if (strcmp(original[num_args], argument) == 0)
 819                         return original;
 820         }
 821         /* Copy the original array */
 822         char **result = smalloc((num_args+2) * sizeof(char*));
 823         memcpy(result, original, num_args * sizeof(char*));
 824         result[num_args] = argument;
 825         result[num_args+1] = NULL;
 826
 827         return result;
 828 }
 829
 830 /*
 831  * Parses a command, see file CMDMODE for more information
 832  *
 833  */
 834 void parse_command(xcb_connection_t *conn, const char *command) {
 835         LOG("--- parsing command \"%s\" ---\n", command);
 836         /* Get the first client from focus stack because floating clients are not
 837          * in any container, therefore CUR_CELL is not appropriate. */
 838         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 839         if (last_focused == SLIST_END(&(c_ws->focus_stack)))
 840                 last_focused = NULL;
 841
 842         /* Hmm, just to be sure */
 843         if (command[0] == '\0')
 844                 return;
 845
 846         /* Is it an <exec>? Then execute the given command. */
 847         if (STARTS_WITH(command, "exec ")) {
 848                 LOG("starting \"%s\"\n", command + strlen("exec "));
 849                 start_application(command+strlen("exec "));
 850                 return;
 851         }
 852
 853         /* Is it an <exit>? */
 854         if (STARTS_WITH(command, "exit")) {
 855                 LOG("User issued exit-command, exiting without error.\n");
 856                 exit(EXIT_SUCCESS);
 857         }
 858
 859         /* Is it <restart>? Then restart in place. */
 860         if (STARTS_WITH(command, "restart")) {
 861                 LOG("restarting \"%s\"...\n", start_argv[0]);
 862                 /* make sure -a is in the argument list or append it */
 863                 start_argv = append_argument(start_argv, "-a");
 864
 865                 execvp(start_argv[0], start_argv);
 866                 /* not reached */
 867         }
 868
 869         if (STARTS_WITH(command, "kill")) {
 870                 if (last_focused == NULL) {
 871                         LOG("There is no window to kill\n");
 872                         return;
 873                 }
 874
 875                 LOG("Killing current window\n");
 876                 client_kill(conn, last_focused);
 877                 return;
 878         }
 879
 880         /* Is it a jump to a specified workspace, row, col? */
 881         if (STARTS_WITH(command, "jump ")) {
 882                 const char *arguments = command + strlen("jump ");
 883                 if (arguments[0] == '"')
 884                         jump_to_window(conn, arguments);
 885                 else jump_to_container(conn, arguments);
 886                 return;
 887         }
 888
 889         /* Should we travel the focus stack? */
 890         if (STARTS_WITH(command, "focus")) {
 891                 const char *arguments = command + strlen("focus ");
 892                 travel_focus_stack(conn, arguments);
 893                 return;
 894         }
 895
 896         /* Is it 'f' for fullscreen? */
 897         if (command[0] == 'f') {
 898                 if (last_focused == NULL)
 899                         return;
 900                 client_toggle_fullscreen(conn, last_focused);
 901                 return;
 902         }
 903
 904         /* Is it just 's' for stacking or 'd' for default? */
 905         if ((command[0] == 's' || command[0] == 'd') && (command[1] == '\0')) {
 906                 if (last_focused == NULL || client_is_floating(last_focused)) {
 907                         LOG("not switching, this is a floating client\n");
 908                         return;
 909                 }
 910                 LOG("Switching mode for current container\n");
 911                 switch_layout_mode(conn, CUR_CELL, (command[0] == 's' ? MODE_STACK : MODE_DEFAULT));
 912                 return;
 913         }
 914
 915         if (command[0] == 'H') {
 916                 LOG("Hiding all floating windows\n");
 917                 floating_toggle_hide(conn, c_ws);
 918                 return;
 919         }
 920
 921         enum { WITH_WINDOW, WITH_CONTAINER, WITH_WORKSPACE } with = WITH_WINDOW;
 922
 923         /* Is it a <with>? */
 924         if (command[0] == 'w') {
 925                 command++;
 926                 /* TODO: implement */
 927                 if (command[0] == 'c') {
 928                         with = WITH_CONTAINER;
 929                         command++;
 930                 } else if (command[0] == 'w') {
 931                         with = WITH_WORKSPACE;
 932                         command++;
 933                 } else {
 934                         LOG("not yet implemented.\n");
 935                         return;
 936                 }
 937         }
 938
 939         /* Is it 't' for toggle tiling/floating? */
 940         if (command[0] == 't') {
 941                 if (with == WITH_WORKSPACE) {
 942                         c_ws->auto_float = !c_ws->auto_float;
 943                         LOG("autofloat is now %d\n", c_ws->auto_float);
 944                         return;
 945                 }
 946                 if (last_focused == NULL) {
 947                         LOG("Cannot toggle tiling/floating: workspace empty\n");
 948                         return;
 949                 }
 950
 951                 toggle_floating_mode(conn, last_focused, false);
 952                 /* delete all empty columns/rows */
 953                 cleanup_table(conn, last_focused->workspace);
 954
 955                 /* Fix colspan/rowspan if it’d overlap */
 956                 fix_colrowspan(conn, last_focused->workspace);
 957
 958                 render_workspace(conn, last_focused->workspace->screen, last_focused->workspace);
 959                 xcb_flush(conn);
 960                 return;
 961         }
 962
 963         /* It’s a normal <cmd> */
 964         char *rest = NULL;
 965         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
 966         direction_t direction;
 967         int times = strtol(command, &rest, 10);
 968         if (rest == NULL) {
 969                 LOG("Invalid command (\"%s\")\n", command);
 970                 return;
 971         }
 972
 973         if (*rest == '\0') {
 974                 /* No rest? This was a workspace number, not a times specification */
 975                 show_workspace(conn, times);
 976                 return;
 977         }
 978
 979         if (*rest == 'm' || *rest == 's') {
 980                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
 981                 rest++;
 982         }
 983
 984         int workspace = strtol(rest, &rest, 10);
 985
 986         if (rest == NULL) {
 987                 LOG("Invalid command (\"%s\")\n", command);
 988                 return;
 989         }
 990
 991         if (*rest == '\0') {
 992                 if (last_focused != NULL && client_is_floating(last_focused))
 993                         move_floating_window_to_workspace(conn, last_focused, workspace);
 994                 else move_current_window_to_workspace(conn, workspace);
 995                 return;
 996         }
 997
 998         if (last_focused == NULL) {
 999                 LOG("Not performing (no window found)\n");
1000                 return;
1001         }
1002
1003         if (client_is_floating(last_focused) &&
1004             (action != ACTION_FOCUS && action != ACTION_MOVE)) {
1005                 LOG("Not performing (floating)\n");
1006                 return;
1007         }
1008
1009         /* Now perform action to <where> */
1010         while (*rest != '\0') {
1011                 if (*rest == 'h')
1012                         direction = D_LEFT;
1013                 else if (*rest == 'j')
1014                         direction = D_DOWN;
1015                 else if (*rest == 'k')
1016                         direction = D_UP;
1017                 else if (*rest == 'l')
1018                         direction = D_RIGHT;
1019                 else {
1020                         LOG("unknown direction: %c\n", *rest);
1021                         return;
1022                 }
1023                 rest++;
1024
1025                 if (action == ACTION_FOCUS) {
1026                         if (client_is_floating(last_focused)) {
1027                                 floating_focus_direction(conn, last_focused, direction);
1028                                 continue;
1029                         }
1030                         focus_thing(conn, direction, (with == WITH_WINDOW ? THING_WINDOW : THING_CONTAINER));
1031                         continue;
1032                 }
1033
1034                 if (action == ACTION_MOVE) {
1035                         if (client_is_floating(last_focused)) {
1036                                 floating_move(conn, last_focused, direction);
1037                                 continue;
1038                         }
1039                         if (with == WITH_WINDOW)
1040                                 move_current_window(conn, direction);
1041                         else move_current_container(conn, direction);
1042                         continue;
1043                 }
1044
1045                 if (action == ACTION_SNAP) {
1046                         snap_current_container(conn, direction);
1047                         continue;
1048                 }
1049         }
1050
1051         LOG("--- done ---\n");
1052 }