git.sur5r.net Git - i3/i3/blob - src/commands.c

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * © 2009 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  */
  11 #include <stdbool.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <assert.h>
  15 #include <unistd.h>
  16 #include <string.h>
  17
  18 #include <xcb/xcb.h>
  19
  20 #include "util.h"
  21 #include "data.h"
  22 #include "table.h"
  23 #include "layout.h"
  24 #include "i3.h"
  25 #include "xinerama.h"
  26 #include "client.h"
  27 #include "floating.h"
  28
  29 bool focus_window_in_container(xcb_connection_t *conn, Container *container, direction_t direction) {
  30         /* If this container is empty, we’re done */
  31         if (container->currently_focused == NULL)
  32                 return false;
  33
  34         /* Get the previous/next client or wrap around */
  35         Client *candidate = NULL;
  36         if (direction == D_UP) {
  37                 if ((candidate = CIRCLEQ_PREV_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  38                         candidate = CIRCLEQ_LAST(&(container->clients));
  39         }
  40         else if (direction == D_DOWN) {
  41                 if ((candidate = CIRCLEQ_NEXT_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  42                         candidate = CIRCLEQ_FIRST(&(container->clients));
  43         } else LOG("Direction not implemented!\n");
  44
  45         /* If we could not switch, the container contains exactly one client. We return false */
  46         if (candidate == container->currently_focused)
  47                 return false;
  48
  49         /* Set focus */
  50         set_focus(conn, candidate, true);
  51
  52         return true;
  53 }
  54
  55 typedef enum { THING_WINDOW, THING_CONTAINER } thing_t;
  56
  57 static void focus_thing(xcb_connection_t *conn, direction_t direction, thing_t thing) {
  58         LOG("focusing direction %d\n", direction);
  59
  60         int new_row = current_row,
  61             new_col = current_col;
  62
  63         Container *container = CUR_CELL;
  64         Workspace *t_ws = c_ws;
  65
  66         /* There always is a container. If not, current_col or current_row is wrong */
  67         assert(container != NULL);
  68
  69         if (container->workspace->fullscreen_client != NULL) {
  70                 LOG("You're in fullscreen mode. Won't switch focus\n");
  71                 return;
  72         }
  73
  74         /* TODO: for horizontal default layout, this has to be expanded to LEFT/RIGHT */
  75         if (direction == D_UP || direction == D_DOWN) {
  76                 if (thing == THING_WINDOW)
  77                         /* Let’s see if we can perform up/down focus in the current container */
  78                         if (focus_window_in_container(conn, container, direction))
  79                                 return;
  80
  81                 if (direction == D_DOWN && cell_exists(current_col, current_row+1))
  82                         new_row = current_row + t_ws->table[current_col][current_row]->rowspan;
  83                 else if (direction == D_UP && cell_exists(current_col, current_row-1)) {
  84                         /* Set new_row as a sane default, but it may get overwritten in a second */
  85                         new_row--;
  86
  87                         /* Search from the top to correctly handle rowspanned containers */
  88                         for (int rows = 0; rows < current_row; rows += t_ws->table[current_col][rows]->rowspan) {
  89                                 if (new_row > (rows + (t_ws->table[current_col][rows]->rowspan - 1)))
  90                                         continue;
  91
  92                                 new_row = rows;
  93                                 break;
  94                         }
  95                 } else {
  96                         /* Let’s see if there is a screen down/up there to which we can switch */
  97                         LOG("container is at %d with height %d\n", container->y, container->height);
  98                         i3Screen *screen;
  99                         int destination_y = (direction == D_UP ? (container->y - 1) : (container->y + container->height + 1));
 100                         if ((screen = get_screen_containing(container->x, destination_y)) == NULL) {
 101                                 LOG("Wrapping screen around vertically\n");
 102                                 /* No screen found? Then wrap */
 103                                 screen = get_screen_most((direction == D_UP ? D_DOWN : D_UP));
 104                         }
 105                         t_ws = &(workspaces[screen->current_workspace]);
 106                         new_row = (direction == D_UP ? (t_ws->rows - 1) : 0);
 107                 }
 108         } else if (direction == D_LEFT || direction == D_RIGHT) {
 109                 if (direction == D_RIGHT && cell_exists(current_col+1, current_row))
 110                         new_col = current_col + t_ws->table[current_col][current_row]->colspan;
 111                 else if (direction == D_LEFT && cell_exists(current_col-1, current_row)) {
 112                         /* Set new_col as a sane default, but it may get overwritten in a second */
 113                         new_col--;
 114
 115                         /* Search from the left to correctly handle colspanned containers */
 116                         for (int cols = 0; cols < current_col; cols += t_ws->table[cols][current_row]->colspan) {
 117                                 if (new_col > (cols + (t_ws->table[cols][current_row]->colspan - 1)))
 118                                         continue;
 119
 120                                 new_col = cols;
 121                                 break;
 122                         }
 123                 } else {
 124                         /* Let’s see if there is a screen left/right here to which we can switch */
 125                         LOG("container is at %d with width %d\n", container->x, container->width);
 126                         i3Screen *screen;
 127                         int destination_x = (direction == D_LEFT ? (container->x - 1) : (container->x + container->width + 1));
 128                         if ((screen = get_screen_containing(destination_x, container->y)) == NULL) {
 129                                 LOG("Wrapping screen around horizontally\n");
 130                                 screen = get_screen_most((direction == D_LEFT ? D_RIGHT : D_LEFT));
 131                         }
 132                         t_ws = &(workspaces[screen->current_workspace]);
 133                         new_col = (direction == D_LEFT ? (t_ws->cols - 1) : 0);
 134                 }
 135         } else {
 136                 LOG("direction unhandled\n");
 137                 return;
 138         }
 139
 140         /* Bounds checking */
 141         if (new_col >= t_ws->cols)
 142                 new_col = (t_ws->cols - 1);
 143         if (new_row >= t_ws->rows)
 144                 new_row = (t_ws->rows - 1);
 145
 146         if (t_ws->table[new_col][new_row]->currently_focused != NULL)
 147                 set_focus(conn, t_ws->table[new_col][new_row]->currently_focused, true);
 148 }
 149
 150 /*
 151  * Tries to move the window inside its current container.
 152  *
 153  * Returns true if the window could be moved, false otherwise.
 154  *
 155  */
 156 static bool move_current_window_in_container(xcb_connection_t *conn, Client *client,
 157                 direction_t direction) {
 158         assert(client->container != NULL);
 159
 160         Client *other = (direction == D_UP ? CIRCLEQ_PREV(client, clients) :
 161                                              CIRCLEQ_NEXT(client, clients));
 162
 163         if (other == CIRCLEQ_END(&(client->container->clients)))
 164                 return false;
 165
 166         LOG("i can do that\n");
 167         /* We can move the client inside its current container */
 168         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 169         if (direction == D_UP)
 170                 CIRCLEQ_INSERT_BEFORE(&(client->container->clients), other, client, clients);
 171         else CIRCLEQ_INSERT_AFTER(&(client->container->clients), other, client, clients);
 172         render_layout(conn);
 173         return true;
 174 }
 175
 176 /*
 177  * Moves the current window or whole container to the given direction, creating a column/row if
 178  * necessary.
 179  *
 180  */
 181 static void move_current_window(xcb_connection_t *conn, direction_t direction) {
 182         LOG("moving window to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 183                                             (direction == D_LEFT ? "left" : "right"))));
 184         /* Get current window */
 185         Container *container = CUR_CELL,
 186                   *new = NULL;
 187
 188         /* There has to be a container, see focus_window() */
 189         assert(container != NULL);
 190
 191         /* If there is no window or the dock window is focused, we’re done */
 192         if (container->currently_focused == NULL ||
 193             container->currently_focused->dock)
 194                 return;
 195
 196         /* As soon as the client is moved away, the last focused client in the old
 197          * container needs to get focus, if any. Therefore, we save it here. */
 198         Client *current_client = container->currently_focused;
 199         Client *to_focus = get_last_focused_client(conn, container, current_client);
 200
 201         if (to_focus == NULL) {
 202                 to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 203                 if (to_focus == NULL)
 204                         to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 205         }
 206
 207         switch (direction) {
 208                 case D_LEFT:
 209                         /* If we’re at the left-most position, move the rest of the table right */
 210                         if (current_col == 0) {
 211                                 expand_table_cols_at_head(c_ws);
 212                                 new = CUR_CELL;
 213                         } else
 214                                 new = CUR_TABLE[--current_col][current_row];
 215                         break;
 216                 case D_RIGHT:
 217                         if (current_col == (c_ws->cols-1))
 218                                 expand_table_cols(c_ws);
 219
 220                         new = CUR_TABLE[++current_col][current_row];
 221                         break;
 222                 case D_UP:
 223                         if (move_current_window_in_container(conn, current_client, D_UP))
 224                                 return;
 225
 226                         /* if we’re at the up-most position, move the rest of the table down */
 227                         if (current_row == 0) {
 228                                 expand_table_rows_at_head(c_ws);
 229                                 new = CUR_CELL;
 230                         } else
 231                                 new = CUR_TABLE[current_col][--current_row];
 232                         break;
 233                 case D_DOWN:
 234                         if (move_current_window_in_container(conn, current_client, D_DOWN))
 235                                 return;
 236
 237                         if (current_row == (c_ws->rows-1))
 238                                 expand_table_rows(c_ws);
 239
 240                         new = CUR_TABLE[current_col][++current_row];
 241                         break;
 242         }
 243
 244         /* Remove it from the old container and put it into the new one */
 245         client_remove_from_container(conn, current_client, container);
 246
 247         if (new->currently_focused != NULL)
 248                 CIRCLEQ_INSERT_AFTER(&(new->clients), new->currently_focused, current_client, clients);
 249         else CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
 250         SLIST_INSERT_HEAD(&(new->workspace->focus_stack), current_client, focus_clients);
 251
 252         /* Update data structures */
 253         current_client->container = new;
 254         container->currently_focused = to_focus;
 255         new->currently_focused = current_client;
 256
 257         Workspace *workspace = container->workspace;
 258
 259         /* delete all empty columns/rows */
 260         cleanup_table(conn, workspace);
 261
 262         /* Fix colspan/rowspan if it’d overlap */
 263         fix_colrowspan(conn, workspace);
 264
 265         render_workspace(conn, workspace->screen, workspace);
 266         xcb_flush(conn);
 267
 268         set_focus(conn, current_client, true);
 269 }
 270
 271 static void move_current_container(xcb_connection_t *conn, direction_t direction) {
 272         LOG("moving container to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 273                                             (direction == D_LEFT ? "left" : "right"))));
 274         /* Get current window */
 275         Container *container = CUR_CELL,
 276                   *new = NULL;
 277
 278         Container **old = &CUR_CELL;
 279
 280         /* There has to be a container, see focus_window() */
 281         assert(container != NULL);
 282
 283         switch (direction) {
 284                 case D_LEFT:
 285                         /* If we’re at the left-most position, move the rest of the table right */
 286                         if (current_col == 0) {
 287                                 expand_table_cols_at_head(c_ws);
 288                                 new = CUR_CELL;
 289                                 old = &CUR_TABLE[current_col+1][current_row];
 290                         } else
 291                                 new = CUR_TABLE[--current_col][current_row];
 292                         break;
 293                 case D_RIGHT:
 294                         if (current_col == (c_ws->cols-1))
 295                                 expand_table_cols(c_ws);
 296
 297                         new = CUR_TABLE[++current_col][current_row];
 298                         break;
 299                 case D_UP:
 300                         /* if we’re at the up-most position, move the rest of the table down */
 301                         if (current_row == 0) {
 302                                 expand_table_rows_at_head(c_ws);
 303                                 new = CUR_CELL;
 304                                 old = &CUR_TABLE[current_col][current_row+1];
 305                         } else
 306                                 new = CUR_TABLE[current_col][--current_row];
 307                         break;
 308                 case D_DOWN:
 309                         if (current_row == (c_ws->rows-1))
 310                                 expand_table_rows(c_ws);
 311
 312                         new = CUR_TABLE[current_col][++current_row];
 313                         break;
 314         }
 315
 316         LOG("old = %d,%d and new = %d,%d\n", container->col, container->row, new->col, new->row);
 317
 318         /* Swap the containers */
 319         int col = new->col;
 320         int row = new->row;
 321
 322         *old = new;
 323         new->col = container->col;
 324         new->row = container->row;
 325
 326         CUR_CELL = container;
 327         container->col = col;
 328         container->row = row;
 329
 330         Workspace *workspace = container->workspace;
 331
 332         /* delete all empty columns/rows */
 333         cleanup_table(conn, workspace);
 334
 335         /* Fix colspan/rowspan if it’d overlap */
 336         fix_colrowspan(conn, workspace);
 337
 338         render_layout(conn);
 339 }
 340
 341 /*
 342  * "Snaps" the current container (not possible for windows, because it works at table base)
 343  * to the given direction, that is, adjusts cellspan/rowspan
 344  *
 345  */
 346 static void snap_current_container(xcb_connection_t *conn, direction_t direction) {
 347         LOG("snapping container to direction %d\n", direction);
 348
 349         Container *container = CUR_CELL;
 350
 351         assert(container != NULL);
 352
 353         switch (direction) {
 354                 case D_LEFT:
 355                         /* Snap to the left is actually a move to the left and then a snap right */
 356                         if (!cell_exists(container->col - 1, container->row) ||
 357                                 CUR_TABLE[container->col-1][container->row]->currently_focused != NULL) {
 358                                 LOG("cannot snap to left - the cell is already used\n");
 359                                 return;
 360                         }
 361
 362                         move_current_window(conn, D_LEFT);
 363                         snap_current_container(conn, D_RIGHT);
 364                         return;
 365                 case D_RIGHT: {
 366                         /* Check if the cell is used */
 367                         int new_col = container->col + container->colspan;
 368                         if (!cell_exists(new_col, container->row) ||
 369                                 CUR_TABLE[new_col][container->row]->currently_focused != NULL) {
 370                                 LOG("cannot snap to right - the cell is already used\n");
 371                                 return;
 372                         }
 373
 374                         /* Check if there are other cells with rowspan, which are in our way.
 375                          * If so, reduce their rowspan. */
 376                         for (int i = container->row-1; i >= 0; i--) {
 377                                 LOG("we got cell %d, %d with rowspan %d\n",
 378                                                 new_col, i, CUR_TABLE[new_col][i]->rowspan);
 379                                 while ((CUR_TABLE[new_col][i]->rowspan-1) >= (container->row - i))
 380                                         CUR_TABLE[new_col][i]->rowspan--;
 381                                 LOG("new rowspan = %d\n", CUR_TABLE[new_col][i]->rowspan);
 382                         }
 383
 384                         container->colspan++;
 385                         break;
 386                 }
 387                 case D_UP:
 388                         if (!cell_exists(container->col, container->row - 1) ||
 389                                 CUR_TABLE[container->col][container->row-1]->currently_focused != NULL) {
 390                                 LOG("cannot snap to top - the cell is already used\n");
 391                                 return;
 392                         }
 393
 394                         move_current_window(conn, D_UP);
 395                         snap_current_container(conn, D_DOWN);
 396                         return;
 397                 case D_DOWN: {
 398                         LOG("snapping down\n");
 399                         int new_row = container->row + container->rowspan;
 400                         if (!cell_exists(container->col, new_row) ||
 401                                 CUR_TABLE[container->col][new_row]->currently_focused != NULL) {
 402                                 LOG("cannot snap down - the cell is already used\n");
 403                                 return;
 404                         }
 405
 406                         for (int i = container->col-1; i >= 0; i--) {
 407                                 LOG("we got cell %d, %d with colspan %d\n",
 408                                                 i, new_row, CUR_TABLE[i][new_row]->colspan);
 409                                 while ((CUR_TABLE[i][new_row]->colspan-1) >= (container->col - i))
 410                                         CUR_TABLE[i][new_row]->colspan--;
 411                                 LOG("new colspan = %d\n", CUR_TABLE[i][new_row]->colspan);
 412
 413                         }
 414
 415                         container->rowspan++;
 416                         break;
 417                 }
 418         }
 419
 420         render_layout(conn);
 421 }
 422
 423 static void move_floating_window_to_workspace(xcb_connection_t *conn, Client *client, int workspace) {
 424         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 425         Workspace *t_ws = &(workspaces[workspace-1]);
 426
 427         LOG("moving floating\n");
 428
 429         if (t_ws->screen == NULL) {
 430                 LOG("initializing new workspace, setting num to %d\n", workspace-1);
 431                 t_ws->screen = c_ws->screen;
 432                 /* Copy the dimensions from the virtual screen */
 433                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 434         } else {
 435                 /* Check if there is already a fullscreen client on the destination workspace and
 436                  * stop moving if so. */
 437                 if (client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 438                         LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 439                         return;
 440                 }
 441         }
 442
 443         /* Remove from focus stack */
 444         SLIST_REMOVE(&(client->workspace->focus_stack), client, Client, focus_clients);
 445
 446         if (client->workspace->fullscreen_client == client)
 447                 client->workspace->fullscreen_client = NULL;
 448
 449         /* Insert into destination focus stack */
 450         client->workspace = t_ws;
 451         SLIST_INSERT_HEAD(&(t_ws->focus_stack), client, focus_clients);
 452         if (client->fullscreen)
 453                 t_ws->fullscreen_client = client;
 454
 455         /* If we’re moving it to an invisible screen, we need to unmap it */
 456         if (t_ws->screen->current_workspace != t_ws->num) {
 457                 LOG("This workspace is not visible, unmapping\n");
 458                 xcb_unmap_window(conn, client->frame);
 459         }
 460
 461         LOG("done\n");
 462
 463         render_layout(conn);
 464 }
 465
 466 /*
 467  * Moves the currently selected window to the given workspace
 468  *
 469  */
 470 static void move_current_window_to_workspace(xcb_connection_t *conn, int workspace) {
 471         LOG("Moving current window to workspace %d\n", workspace);
 472
 473         Container *container = CUR_CELL;
 474
 475         assert(container != NULL);
 476
 477         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 478         Workspace *t_ws = &(workspaces[workspace-1]);
 479
 480         Client *current_client = container->currently_focused;
 481         if (current_client == NULL) {
 482                 LOG("No currently focused client in current container.\n");
 483                 return;
 484         }
 485         Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 486         if (to_focus == NULL)
 487                 to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 488
 489         if (t_ws->screen == NULL) {
 490                 LOG("initializing new workspace, setting num to %d\n", workspace-1);
 491                 t_ws->screen = container->workspace->screen;
 492                 /* Copy the dimensions from the virtual screen */
 493                 memcpy(&(t_ws->rect), &(container->workspace->screen->rect), sizeof(Rect));
 494         } else {
 495                 /* Check if there is already a fullscreen client on the destination workspace and
 496                  * stop moving if so. */
 497                 if (current_client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 498                         LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 499                         return;
 500                 }
 501         }
 502
 503         Container *to_container = t_ws->table[t_ws->current_col][t_ws->current_row];
 504
 505         assert(to_container != NULL);
 506
 507         client_remove_from_container(conn, current_client, container);
 508         if (container->workspace->fullscreen_client == current_client)
 509                 container->workspace->fullscreen_client = NULL;
 510
 511         /* TODO: insert it to the correct position */
 512         CIRCLEQ_INSERT_TAIL(&(to_container->clients), current_client, clients);
 513
 514         SLIST_INSERT_HEAD(&(to_container->workspace->focus_stack), current_client, focus_clients);
 515         if (current_client->fullscreen)
 516                 t_ws->fullscreen_client = current_client;
 517         LOG("Moved.\n");
 518
 519         current_client->container = to_container;
 520         container->currently_focused = to_focus;
 521         to_container->currently_focused = current_client;
 522
 523         /* If we’re moving it to an invisible screen, we need to unmap it */
 524         if (to_container->workspace->screen->current_workspace != to_container->workspace->num) {
 525                 LOG("This workspace is not visible, unmapping\n");
 526                 xcb_unmap_window(conn, current_client->frame);
 527         }
 528
 529         /* delete all empty columns/rows */
 530         cleanup_table(conn, container->workspace);
 531
 532         render_layout(conn);
 533 }
 534
 535 /*
 536  * Switches to the given workspace
 537  *
 538  */
 539 void show_workspace(xcb_connection_t *conn, int workspace) {
 540         Client *client;
 541         bool need_warp = false;
 542         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 543         /* t_ws (to workspace) is just a convenience pointer to the workspace we’re switching to */
 544         Workspace *t_ws = &(workspaces[workspace-1]);
 545
 546         LOG("show_workspace(%d)\n", workspace);
 547
 548         /* Store current_row/current_col */
 549         c_ws->current_row = current_row;
 550         c_ws->current_col = current_col;
 551
 552         /* Check if the workspace has not been used yet */
 553         if (t_ws->screen == NULL) {
 554                 LOG("initializing new workspace, setting num to %d\n", workspace);
 555                 t_ws->screen = c_ws->screen;
 556                 /* Copy the dimensions from the virtual screen */
 557                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 558         }
 559
 560         if (c_ws->screen != t_ws->screen) {
 561                 /* We need to switch to the other screen first */
 562                 LOG("moving over to other screen.\n");
 563
 564                 /* Store the old client */
 565                 Client *old_client = CUR_CELL->currently_focused;
 566
 567                 c_ws = &(workspaces[t_ws->screen->current_workspace]);
 568                 current_col = c_ws->current_col;
 569                 current_row = c_ws->current_row;
 570                 if (CUR_CELL->currently_focused != NULL)
 571                         need_warp = true;
 572                 else {
 573                         Rect *dims = &(c_ws->screen->rect);
 574                         xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0,
 575                                          dims->x + (dims->width / 2), dims->y + (dims->height / 2));
 576                 }
 577
 578                 /* Re-decorate the old client, it’s not focused anymore */
 579                 if ((old_client != NULL) && !old_client->dock)
 580                         redecorate_window(conn, old_client);
 581                 else xcb_flush(conn);
 582         }
 583
 584         /* Check if we need to change something or if we’re already there */
 585         if (c_ws->screen->current_workspace == (workspace-1)) {
 586                 if (CUR_CELL->currently_focused != NULL) {
 587                         set_focus(conn, CUR_CELL->currently_focused, true);
 588                         if (need_warp) {
 589                                 client_warp_pointer_into(conn, CUR_CELL->currently_focused);
 590                                 xcb_flush(conn);
 591                         }
 592                 }
 593                 return;
 594         }
 595
 596         t_ws->screen->current_workspace = workspace-1;
 597         Workspace *old_workspace = c_ws;
 598         c_ws = &workspaces[workspace-1];
 599
 600         /* Unmap all clients of the old workspace */
 601         unmap_workspace(conn, old_workspace);
 602
 603         current_row = c_ws->current_row;
 604         current_col = c_ws->current_col;
 605         LOG("new current row = %d, current col = %d\n", current_row, current_col);
 606
 607         ignore_enter_notify_forall(conn, c_ws, true);
 608
 609         /* Map all clients on the new workspace */
 610         FOR_TABLE(c_ws)
 611                 CIRCLEQ_FOREACH(client, &(c_ws->table[cols][rows]->clients), clients)
 612                         xcb_map_window(conn, client->frame);
 613
 614         /* Map all floating clients */
 615         SLIST_FOREACH(client, &(c_ws->focus_stack), focus_clients) {
 616                 if (!client->floating)
 617                         continue;
 618
 619                 xcb_map_window(conn, client->frame);
 620         }
 621
 622         /* Map all stack windows, if any */
 623         struct Stack_Window *stack_win;
 624         SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 625                 if (stack_win->container->workspace == c_ws)
 626                         xcb_map_window(conn, stack_win->window);
 627
 628         ignore_enter_notify_forall(conn, c_ws, false);
 629
 630         /* Restore focus on the new workspace */
 631         if (CUR_CELL->currently_focused != NULL) {
 632                 set_focus(conn, CUR_CELL->currently_focused, true);
 633                 if (need_warp) {
 634                         client_warp_pointer_into(conn, CUR_CELL->currently_focused);
 635                         xcb_flush(conn);
 636                 }
 637         } else xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
 638
 639         render_layout(conn);
 640 }
 641
 642 /*
 643  * Jumps to the given window class / title.
 644  * Title is matched using strstr, that is, matches if it appears anywhere
 645  * in the string. Regular expressions seem to be a bit overkill here. However,
 646  * if we need them for something else somewhen, we may introduce them here, too.
 647  *
 648  */
 649 static void jump_to_window(xcb_connection_t *conn, const char *arguments) {
 650         char *classtitle;
 651         Client *client;
 652
 653         /* The first character is a quote, this was checked before */
 654         classtitle = sstrdup(arguments+1);
 655         /* The last character is a quote, we just set it to NULL */
 656         classtitle[strlen(classtitle)-1] = '\0';
 657
 658         if ((client = get_matching_client(conn, classtitle, NULL)) == NULL) {
 659                 free(classtitle);
 660                 LOG("No matching client found.\n");
 661                 return;
 662         }
 663
 664         free(classtitle);
 665         set_focus(conn, client, true);
 666 }
 667
 668 /*
 669  * Jump directly to the specified workspace, row and col.
 670  * Great for reaching windows that you always keep in the same spot (hello irssi, I'm looking at you)
 671  *
 672  */
 673 static void jump_to_container(xcb_connection_t *conn, const char *arguments) {
 674         int ws, row, col;
 675         int result;
 676
 677         result = sscanf(arguments, "%d %d %d", &ws, &col, &row);
 678         LOG("Jump called with %d parameters (\"%s\")\n", result, arguments);
 679
 680         /* No match? Either no arguments were specified, or no numbers */
 681         if (result < 1) {
 682                 LOG("At least one valid argument required\n");
 683                 return;
 684         }
 685
 686         /* Move to the target workspace */
 687         show_workspace(conn, ws);
 688
 689         if (result < 3)
 690                 return;
 691
 692         LOG("Boundary-checking col %d, row %d... (max cols %d, max rows %d)\n", col, row, c_ws->cols, c_ws->rows);
 693
 694         /* Move to row/col */
 695         if (row >= c_ws->rows)
 696                 row = c_ws->rows - 1;
 697         if (col >= c_ws->cols)
 698                 col = c_ws->cols - 1;
 699
 700         LOG("Jumping to col %d, row %d\n", col, row);
 701         if (c_ws->table[col][row]->currently_focused != NULL)
 702                 set_focus(conn, c_ws->table[col][row]->currently_focused, true);
 703 }
 704
 705 /*
 706  * Travels the focus stack by the given number of times (or once, if no argument
 707  * was specified). That is, selects the window you were in before you focused
 708  * the current window.
 709  *
 710  */
 711 static void travel_focus_stack(xcb_connection_t *conn, const char *arguments) {
 712         /* Start count at -1 to always skip the first element */
 713         int times, count = -1;
 714         Client *current;
 715
 716         if (sscanf(arguments, "%u", &times) != 1) {
 717                 LOG("No or invalid argument given (\"%s\"), using default of 1 times\n", arguments);
 718                 times = 1;
 719         }
 720
 721         Workspace *ws = CUR_CELL->workspace;
 722
 723         SLIST_FOREACH(current, &(ws->focus_stack), focus_clients) {
 724                 if (++count < times) {
 725                         LOG("Skipping\n");
 726                         continue;
 727                 }
 728
 729                 LOG("Focussing\n");
 730                 set_focus(conn, current, true);
 731                 break;
 732         }
 733 }
 734
 735 /*
 736  * Goes through the list of arguments (for exec()) and checks if the given argument
 737  * is present. If not, it copies the arguments (because we cannot realloc it) and
 738  * appends the given argument.
 739  *
 740  */
 741 static char **append_argument(char **original, char *argument) {
 742         int num_args;
 743         for (num_args = 0; original[num_args] != NULL; num_args++) {
 744                 LOG("original argument: \"%s\"\n", original[num_args]);
 745                 /* If the argument is already present we return the original pointer */
 746                 if (strcmp(original[num_args], argument) == 0)
 747                         return original;
 748         }
 749         /* Copy the original array */
 750         char **result = smalloc((num_args+2) * sizeof(char*));
 751         memcpy(result, original, num_args * sizeof(char*));
 752         result[num_args] = argument;
 753         result[num_args+1] = NULL;
 754
 755         return result;
 756 }
 757
 758 /*
 759  * Parses a command, see file CMDMODE for more information
 760  *
 761  */
 762 void parse_command(xcb_connection_t *conn, const char *command) {
 763         LOG("--- parsing command \"%s\" ---\n", command);
 764         /* Get the first client from focus stack because floating clients are not
 765          * in any container, therefore CUR_CELL is not appropriate. */
 766         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 767         if (last_focused == SLIST_END(&(c_ws->focus_stack)))
 768                 last_focused = NULL;
 769
 770         /* Hmm, just to be sure */
 771         if (command[0] == '\0')
 772                 return;
 773
 774         /* Is it an <exec>? Then execute the given command. */
 775         if (STARTS_WITH(command, "exec ")) {
 776                 LOG("starting \"%s\"\n", command + strlen("exec "));
 777                 start_application(command+strlen("exec "));
 778                 return;
 779         }
 780
 781         /* Is it an <exit>? */
 782         if (STARTS_WITH(command, "exit")) {
 783                 LOG("User issued exit-command, exiting without error.\n");
 784                 exit(EXIT_SUCCESS);
 785         }
 786
 787         /* Is it <restart>? Then restart in place. */
 788         if (STARTS_WITH(command, "restart")) {
 789                 LOG("restarting \"%s\"...\n", start_argv[0]);
 790                 /* make sure -a is in the argument list or append it */
 791                 start_argv = append_argument(start_argv, "-a");
 792
 793                 execvp(start_argv[0], start_argv);
 794                 /* not reached */
 795         }
 796
 797         if (STARTS_WITH(command, "kill")) {
 798                 if (last_focused == NULL) {
 799                         LOG("There is no window to kill\n");
 800                         return;
 801                 }
 802
 803                 LOG("Killing current window\n");
 804                 client_kill(conn, last_focused);
 805                 return;
 806         }
 807
 808         /* Is it a jump to a specified workspace, row, col? */
 809         if (STARTS_WITH(command, "jump ")) {
 810                 const char *arguments = command + strlen("jump ");
 811                 if (arguments[0] == '"')
 812                         jump_to_window(conn, arguments);
 813                 else jump_to_container(conn, arguments);
 814                 return;
 815         }
 816
 817         /* Should we travel the focus stack? */
 818         if (STARTS_WITH(command, "focus")) {
 819                 const char *arguments = command + strlen("focus");
 820                 travel_focus_stack(conn, arguments);
 821                 return;
 822         }
 823
 824         /* Is it 'f' for fullscreen? */
 825         if (command[0] == 'f') {
 826                 if (last_focused == NULL)
 827                         return;
 828                 client_toggle_fullscreen(conn, last_focused);
 829                 return;
 830         }
 831
 832         /* Is it just 's' for stacking or 'd' for default? */
 833         if ((command[0] == 's' || command[0] == 'd') && (command[1] == '\0')) {
 834                 if (last_focused->floating) {
 835                         LOG("not switching, this is a floating client\n");
 836                         return;
 837                 }
 838                 LOG("Switching mode for current container\n");
 839                 switch_layout_mode(conn, CUR_CELL, (command[0] == 's' ? MODE_STACK : MODE_DEFAULT));
 840                 return;
 841         }
 842
 843         /* Is it 't' for toggle tiling/floating? */
 844         if (command[0] == 't') {
 845                 if (last_focused == NULL) {
 846                         LOG("Cannot toggle tiling/floating: workspace empty\n");
 847                         return;
 848                 }
 849
 850                 toggle_floating_mode(conn, last_focused);
 851                 /* delete all empty columns/rows */
 852                 cleanup_table(conn, last_focused->workspace);
 853
 854                 /* Fix colspan/rowspan if it’d overlap */
 855                 fix_colrowspan(conn, last_focused->workspace);
 856
 857                 render_workspace(conn, last_focused->workspace->screen, last_focused->workspace);
 858                 xcb_flush(conn);
 859                 return;
 860         }
 861
 862         enum { WITH_WINDOW, WITH_CONTAINER } with = WITH_WINDOW;
 863
 864         /* Is it a <with>? */
 865         if (command[0] == 'w') {
 866                 command++;
 867                 /* TODO: implement */
 868                 if (command[0] == 'c') {
 869                         with = WITH_CONTAINER;
 870                         command++;
 871                 } else {
 872                         LOG("not yet implemented.\n");
 873                         return;
 874                 }
 875         }
 876
 877         /* It’s a normal <cmd> */
 878         char *rest = NULL;
 879         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
 880         direction_t direction;
 881         int times = strtol(command, &rest, 10);
 882         if (rest == NULL) {
 883                 LOG("Invalid command (\"%s\")\n", command);
 884                 return;
 885         }
 886
 887         if (*rest == '\0') {
 888                 /* No rest? This was a tag number, not a times specification */
 889                 show_workspace(conn, times);
 890                 return;
 891         }
 892
 893         if (*rest == 'm' || *rest == 's') {
 894                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
 895                 rest++;
 896         }
 897
 898         int workspace = strtol(rest, &rest, 10);
 899
 900         if (rest == NULL) {
 901                 LOG("Invalid command (\"%s\")\n", command);
 902                 return;
 903         }
 904
 905         if (*rest == '\0') {
 906                 if (last_focused->floating)
 907                         move_floating_window_to_workspace(conn, last_focused, workspace);
 908                 else move_current_window_to_workspace(conn, workspace);
 909                 return;
 910         }
 911
 912         if (last_focused->floating) {
 913                 LOG("Not performing because this is a floating window\n");
 914                 return;
 915         }
 916
 917         /* Now perform action to <where> */
 918         while (*rest != '\0') {
 919                 if (*rest == 'h')
 920                         direction = D_LEFT;
 921                 else if (*rest == 'j')
 922                         direction = D_DOWN;
 923                 else if (*rest == 'k')
 924                         direction = D_UP;
 925                 else if (*rest == 'l')
 926                         direction = D_RIGHT;
 927                 else {
 928                         LOG("unknown direction: %c\n", *rest);
 929                         return;
 930                 }
 931
 932                 if (action == ACTION_FOCUS)
 933                         focus_thing(conn, direction, (with == WITH_WINDOW ? THING_WINDOW : THING_CONTAINER));
 934                 else if (action == ACTION_MOVE) {
 935                         if (with == WITH_WINDOW)
 936                                 move_current_window(conn, direction);
 937                         else move_current_container(conn, direction);
 938                 }
 939                 else if (action == ACTION_SNAP)
 940                         snap_current_container(conn, direction);
 941
 942                 rest++;
 943         }
 944
 945         LOG("--- done ---\n");
 946 }