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 #include "xcb.h"
  29 #include "config.h"
  30
  31 bool focus_window_in_container(xcb_connection_t *conn, Container *container, direction_t direction) {
  32         /* If this container is empty, we’re done */
  33         if (container->currently_focused == NULL)
  34                 return false;
  35
  36         /* Get the previous/next client or wrap around */
  37         Client *candidate = NULL;
  38         if (direction == D_UP) {
  39                 if ((candidate = CIRCLEQ_PREV_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  40                         candidate = CIRCLEQ_LAST(&(container->clients));
  41         }
  42         else if (direction == D_DOWN) {
  43                 if ((candidate = CIRCLEQ_NEXT_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  44                         candidate = CIRCLEQ_FIRST(&(container->clients));
  45         } else LOG("Direction not implemented!\n");
  46
  47         /* If we could not switch, the container contains exactly one client. We return false */
  48         if (candidate == container->currently_focused)
  49                 return false;
  50
  51         /* Set focus */
  52         set_focus(conn, candidate, true);
  53
  54         return true;
  55 }
  56
  57 typedef enum { THING_WINDOW, THING_CONTAINER } thing_t;
  58
  59 static void focus_thing(xcb_connection_t *conn, direction_t direction, thing_t thing) {
  60         LOG("focusing direction %d\n", direction);
  61
  62         int new_row = current_row,
  63             new_col = current_col;
  64         Container *container = CUR_CELL;
  65         Workspace *t_ws = c_ws;
  66
  67         /* Makes sure new_col and new_row are within bounds of the new workspace */
  68         void check_colrow_boundaries() {
  69                 if (new_col >= t_ws->cols)
  70                         new_col = (t_ws->cols - 1);
  71                 if (new_row >= t_ws->rows)
  72                         new_row = (t_ws->rows - 1);
  73         }
  74
  75         /* There always is a container. If not, current_col or current_row is wrong */
  76         assert(container != NULL);
  77
  78         if (container->workspace->fullscreen_client != NULL) {
  79                 LOG("You're in fullscreen mode. Won't switch focus\n");
  80                 return;
  81         }
  82
  83         /* TODO: for horizontal default layout, this has to be expanded to LEFT/RIGHT */
  84         if (direction == D_UP || direction == D_DOWN) {
  85                 if (thing == THING_WINDOW)
  86                         /* Let’s see if we can perform up/down focus in the current container */
  87                         if (focus_window_in_container(conn, container, direction))
  88                                 return;
  89
  90                 if (direction == D_DOWN && cell_exists(current_col, current_row+1))
  91                         new_row = current_row + t_ws->table[current_col][current_row]->rowspan;
  92                 else if (direction == D_UP && cell_exists(current_col, current_row-1)) {
  93                         /* Set new_row as a sane default, but it may get overwritten in a second */
  94                         new_row--;
  95
  96                         /* Search from the top to correctly handle rowspanned containers */
  97                         for (int rows = 0; rows < current_row; rows += t_ws->table[current_col][rows]->rowspan) {
  98                                 if (new_row > (rows + (t_ws->table[current_col][rows]->rowspan - 1)))
  99                                         continue;
 100
 101                                 new_row = rows;
 102                                 break;
 103                         }
 104                 } else {
 105                         /* Let’s see if there is a screen down/up there to which we can switch */
 106                         LOG("container is at %d with height %d\n", container->y, container->height);
 107                         i3Screen *screen;
 108                         int destination_y = (direction == D_UP ? (container->y - 1) : (container->y + container->height + 1));
 109                         if ((screen = get_screen_containing(container->x, destination_y)) == NULL) {
 110                                 LOG("Wrapping screen around vertically\n");
 111                                 /* No screen found? Then wrap */
 112                                 screen = get_screen_most((direction == D_UP ? D_DOWN : D_UP));
 113                         }
 114                         t_ws = &(workspaces[screen->current_workspace]);
 115                         new_row = (direction == D_UP ? (t_ws->rows - 1) : 0);
 116                 }
 117
 118                 check_colrow_boundaries();
 119
 120                 LOG("new_col = %d, new_row = %d\n", new_col, new_row);
 121                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
 122                         LOG("Cell empty, checking for colspanned client above...\n");
 123                         for (int cols = 0; cols < new_col; cols += t_ws->table[cols][new_row]->colspan) {
 124                                 if (new_col > (cols + (t_ws->table[cols][new_row]->colspan - 1)))
 125                                         continue;
 126
 127                                 new_col = cols;
 128                                 break;
 129                         }
 130                         LOG("Fixed it to new col %d\n", new_col);
 131                 }
 132         } else if (direction == D_LEFT || direction == D_RIGHT) {
 133                 if (direction == D_RIGHT && cell_exists(current_col+1, current_row))
 134                         new_col = current_col + t_ws->table[current_col][current_row]->colspan;
 135                 else if (direction == D_LEFT && cell_exists(current_col-1, current_row)) {
 136                         /* Set new_col as a sane default, but it may get overwritten in a second */
 137                         new_col--;
 138
 139                         /* Search from the left to correctly handle colspanned containers */
 140                         for (int cols = 0; cols < current_col; cols += t_ws->table[cols][current_row]->colspan) {
 141                                 if (new_col > (cols + (t_ws->table[cols][current_row]->colspan - 1)))
 142                                         continue;
 143
 144                                 new_col = cols;
 145                                 break;
 146                         }
 147                 } else {
 148                         /* Let’s see if there is a screen left/right here to which we can switch */
 149                         LOG("container is at %d with width %d\n", container->x, container->width);
 150                         i3Screen *screen;
 151                         int destination_x = (direction == D_LEFT ? (container->x - 1) : (container->x + container->width + 1));
 152                         if ((screen = get_screen_containing(destination_x, container->y)) == NULL) {
 153                                 LOG("Wrapping screen around horizontally\n");
 154                                 screen = get_screen_most((direction == D_LEFT ? D_RIGHT : D_LEFT));
 155                         }
 156                         t_ws = &(workspaces[screen->current_workspace]);
 157                         new_col = (direction == D_LEFT ? (t_ws->cols - 1) : 0);
 158                 }
 159
 160                 check_colrow_boundaries();
 161
 162                 LOG("new_col = %d, new_row = %d\n", new_col, new_row);
 163                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
 164                         LOG("Cell empty, checking for rowspanned client above...\n");
 165                         for (int rows = 0; rows < new_row; rows += t_ws->table[new_col][rows]->rowspan) {
 166                                 if (new_row > (rows + (t_ws->table[new_col][rows]->rowspan - 1)))
 167                                         continue;
 168
 169                                 new_row = rows;
 170                                 break;
 171                         }
 172                         LOG("Fixed it to new row %d\n", new_row);
 173                 }
 174         } else {
 175                 LOG("direction unhandled\n");
 176                 return;
 177         }
 178
 179         check_colrow_boundaries();
 180
 181         if (t_ws->table[new_col][new_row]->currently_focused != NULL)
 182                 set_focus(conn, t_ws->table[new_col][new_row]->currently_focused, true);
 183 }
 184
 185 /*
 186  * Tries to move the window inside its current container.
 187  *
 188  * Returns true if the window could be moved, false otherwise.
 189  *
 190  */
 191 static bool move_current_window_in_container(xcb_connection_t *conn, Client *client,
 192                 direction_t direction) {
 193         assert(client->container != NULL);
 194
 195         Client *other = (direction == D_UP ? CIRCLEQ_PREV(client, clients) :
 196                                              CIRCLEQ_NEXT(client, clients));
 197
 198         if (other == CIRCLEQ_END(&(client->container->clients)))
 199                 return false;
 200
 201         LOG("i can do that\n");
 202         /* We can move the client inside its current container */
 203         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 204         if (direction == D_UP)
 205                 CIRCLEQ_INSERT_BEFORE(&(client->container->clients), other, client, clients);
 206         else CIRCLEQ_INSERT_AFTER(&(client->container->clients), other, client, clients);
 207         render_layout(conn);
 208         return true;
 209 }
 210
 211 /*
 212  * Moves the current window or whole container to the given direction, creating a column/row if
 213  * necessary.
 214  *
 215  */
 216 static void move_current_window(xcb_connection_t *conn, direction_t direction) {
 217         LOG("moving window to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 218                                             (direction == D_LEFT ? "left" : "right"))));
 219         /* Get current window */
 220         Container *container = CUR_CELL,
 221                   *new = NULL;
 222
 223         /* There has to be a container, see focus_window() */
 224         assert(container != NULL);
 225
 226         /* If there is no window or the dock window is focused, we’re done */
 227         if (container->currently_focused == NULL ||
 228             container->currently_focused->dock)
 229                 return;
 230
 231         /* As soon as the client is moved away, the last focused client in the old
 232          * container needs to get focus, if any. Therefore, we save it here. */
 233         Client *current_client = container->currently_focused;
 234         Client *to_focus = get_last_focused_client(conn, container, current_client);
 235
 236         if (to_focus == NULL) {
 237                 to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 238                 if (to_focus == NULL)
 239                         to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 240         }
 241
 242         switch (direction) {
 243                 case D_LEFT:
 244                         /* If we’re at the left-most position, move the rest of the table right */
 245                         if (current_col == 0) {
 246                                 expand_table_cols_at_head(c_ws);
 247                                 new = CUR_CELL;
 248                         } else
 249                                 new = CUR_TABLE[--current_col][current_row];
 250                         break;
 251                 case D_RIGHT:
 252                         if (current_col == (c_ws->cols-1))
 253                                 expand_table_cols(c_ws);
 254
 255                         new = CUR_TABLE[++current_col][current_row];
 256                         break;
 257                 case D_UP:
 258                         if (move_current_window_in_container(conn, current_client, D_UP))
 259                                 return;
 260
 261                         /* if we’re at the up-most position, move the rest of the table down */
 262                         if (current_row == 0) {
 263                                 expand_table_rows_at_head(c_ws);
 264                                 new = CUR_CELL;
 265                         } else
 266                                 new = CUR_TABLE[current_col][--current_row];
 267                         break;
 268                 case D_DOWN:
 269                         if (move_current_window_in_container(conn, current_client, D_DOWN))
 270                                 return;
 271
 272                         if (current_row == (c_ws->rows-1))
 273                                 expand_table_rows(c_ws);
 274
 275                         new = CUR_TABLE[current_col][++current_row];
 276                         break;
 277                 /* To make static analyzers happy: */
 278                 default:
 279                         return;
 280         }
 281
 282         /* Remove it from the old container and put it into the new one */
 283         client_remove_from_container(conn, current_client, container, true);
 284
 285         if (new->currently_focused != NULL)
 286                 CIRCLEQ_INSERT_AFTER(&(new->clients), new->currently_focused, current_client, clients);
 287         else CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
 288         SLIST_INSERT_HEAD(&(new->workspace->focus_stack), current_client, focus_clients);
 289
 290         /* Update data structures */
 291         current_client->container = new;
 292         current_client->workspace = new->workspace;
 293         container->currently_focused = to_focus;
 294         new->currently_focused = current_client;
 295
 296         Workspace *workspace = container->workspace;
 297
 298         /* delete all empty columns/rows */
 299         cleanup_table(conn, workspace);
 300
 301         /* Fix colspan/rowspan if it’d overlap */
 302         fix_colrowspan(conn, workspace);
 303
 304         render_workspace(conn, workspace->screen, workspace);
 305         xcb_flush(conn);
 306
 307         set_focus(conn, current_client, true);
 308 }
 309
 310 static void move_current_container(xcb_connection_t *conn, direction_t direction) {
 311         LOG("moving container to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 312                                             (direction == D_LEFT ? "left" : "right"))));
 313         /* Get current window */
 314         Container *container = CUR_CELL,
 315                   *new = NULL;
 316
 317         Container **old = &CUR_CELL;
 318
 319         /* There has to be a container, see focus_window() */
 320         assert(container != NULL);
 321
 322         switch (direction) {
 323                 case D_LEFT:
 324                         /* If we’re at the left-most position, move the rest of the table right */
 325                         if (current_col == 0) {
 326                                 expand_table_cols_at_head(c_ws);
 327                                 new = CUR_CELL;
 328                                 old = &CUR_TABLE[current_col+1][current_row];
 329                         } else
 330                                 new = CUR_TABLE[--current_col][current_row];
 331                         break;
 332                 case D_RIGHT:
 333                         if (current_col == (c_ws->cols-1))
 334                                 expand_table_cols(c_ws);
 335
 336                         new = CUR_TABLE[++current_col][current_row];
 337                         break;
 338                 case D_UP:
 339                         /* if we’re at the up-most position, move the rest of the table down */
 340                         if (current_row == 0) {
 341                                 expand_table_rows_at_head(c_ws);
 342                                 new = CUR_CELL;
 343                                 old = &CUR_TABLE[current_col][current_row+1];
 344                         } else
 345                                 new = CUR_TABLE[current_col][--current_row];
 346                         break;
 347                 case D_DOWN:
 348                         if (current_row == (c_ws->rows-1))
 349                                 expand_table_rows(c_ws);
 350
 351                         new = CUR_TABLE[current_col][++current_row];
 352                         break;
 353                 /* To make static analyzers happy: */
 354                 default:
 355                         return;
 356         }
 357
 358         LOG("old = %d,%d and new = %d,%d\n", container->col, container->row, new->col, new->row);
 359
 360         /* Swap the containers */
 361         int col = new->col;
 362         int row = new->row;
 363
 364         *old = new;
 365         new->col = container->col;
 366         new->row = container->row;
 367
 368         CUR_CELL = container;
 369         container->col = col;
 370         container->row = row;
 371
 372         Workspace *workspace = container->workspace;
 373
 374         /* delete all empty columns/rows */
 375         cleanup_table(conn, workspace);
 376
 377         /* Fix colspan/rowspan if it’d overlap */
 378         fix_colrowspan(conn, workspace);
 379
 380         render_layout(conn);
 381 }
 382
 383 /*
 384  * "Snaps" the current container (not possible for windows, because it works at table base)
 385  * to the given direction, that is, adjusts cellspan/rowspan
 386  *
 387  */
 388 static void snap_current_container(xcb_connection_t *conn, direction_t direction) {
 389         LOG("snapping container to direction %d\n", direction);
 390
 391         Container *container = CUR_CELL;
 392
 393         assert(container != NULL);
 394
 395         switch (direction) {
 396                 case D_LEFT:
 397                         /* Snap to the left is actually a move to the left and then a snap right */
 398                         if (!cell_exists(container->col - 1, container->row) ||
 399                             CUR_TABLE[container->col-1][container->row]->currently_focused != NULL) {
 400                                 LOG("cannot snap to left - the cell is already used\n");
 401                                 return;
 402                         }
 403
 404                         move_current_window(conn, D_LEFT);
 405                         snap_current_container(conn, D_RIGHT);
 406                         return;
 407                 case D_RIGHT: {
 408                         /* Check if the cell is used */
 409                         int new_col = container->col + container->colspan;
 410                         for (int i = 0; i < container->rowspan; i++)
 411                                 if (!cell_exists(new_col, container->row + i) ||
 412                                     CUR_TABLE[new_col][container->row + i]->currently_focused != NULL) {
 413                                         LOG("cannot snap to right - the cell is already used\n");
 414                                         return;
 415                                 }
 416
 417                         /* Check if there are other cells with rowspan, which are in our way.
 418                          * If so, reduce their rowspan. */
 419                         for (int i = container->row-1; i >= 0; i--) {
 420                                 LOG("we got cell %d, %d with rowspan %d\n",
 421                                                 new_col, i, CUR_TABLE[new_col][i]->rowspan);
 422                                 while ((CUR_TABLE[new_col][i]->rowspan-1) >= (container->row - i))
 423                                         CUR_TABLE[new_col][i]->rowspan--;
 424                                 LOG("new rowspan = %d\n", CUR_TABLE[new_col][i]->rowspan);
 425                         }
 426
 427                         container->colspan++;
 428                         break;
 429                 }
 430                 case D_UP:
 431                         if (!cell_exists(container->col, container->row - 1) ||
 432                             CUR_TABLE[container->col][container->row-1]->currently_focused != NULL) {
 433                                 LOG("cannot snap to top - the cell is already used\n");
 434                                 return;
 435                         }
 436
 437                         move_current_window(conn, D_UP);
 438                         snap_current_container(conn, D_DOWN);
 439                         return;
 440                 case D_DOWN: {
 441                         LOG("snapping down\n");
 442                         int new_row = container->row + container->rowspan;
 443                         for (int i = 0; i < container->colspan; i++)
 444                                 if (!cell_exists(container->col + i, new_row) ||
 445                                     CUR_TABLE[container->col + i][new_row]->currently_focused != NULL) {
 446                                         LOG("cannot snap down - the cell is already used\n");
 447                                         return;
 448                                 }
 449
 450                         for (int i = container->col-1; i >= 0; i--) {
 451                                 LOG("we got cell %d, %d with colspan %d\n",
 452                                                 i, new_row, CUR_TABLE[i][new_row]->colspan);
 453                                 while ((CUR_TABLE[i][new_row]->colspan-1) >= (container->col - i))
 454                                         CUR_TABLE[i][new_row]->colspan--;
 455                                 LOG("new colspan = %d\n", CUR_TABLE[i][new_row]->colspan);
 456
 457                         }
 458
 459                         container->rowspan++;
 460                         break;
 461                 }
 462                 /* To make static analyzers happy: */
 463                 default:
 464                         return;
 465         }
 466
 467         render_layout(conn);
 468 }
 469
 470 static void move_floating_window_to_workspace(xcb_connection_t *conn, Client *client, int workspace) {
 471         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 472         Workspace *t_ws = &(workspaces[workspace-1]),
 473                   *old_ws = client->workspace;
 474
 475         LOG("moving floating\n");
 476
 477         if (t_ws->screen == NULL) {
 478                 LOG("initializing new workspace, setting num to %d\n", workspace-1);
 479                 t_ws->screen = c_ws->screen;
 480                 /* Copy the dimensions from the virtual screen */
 481                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 482         } else {
 483                 /* Check if there is already a fullscreen client on the destination workspace and
 484                  * stop moving if so. */
 485                 if (client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 486                         LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 487                         return;
 488                 }
 489         }
 490
 491         floating_assign_to_workspace(client, t_ws);
 492
 493         bool target_invisible = t_ws->screen->current_workspace != t_ws->num;
 494
 495         /* If we’re moving it to an invisible screen, we need to unmap it */
 496         if (target_invisible) {
 497                 LOG("This workspace is not visible, unmapping\n");
 498                 xcb_unmap_window(conn, client->frame);
 499         } else {
 500                 /* If this is not the case, we move the window to a workspace
 501                  * which is on another screen, so we also need to adjust its
 502                  * coordinates. */
 503                 LOG("before x = %d, y = %d\n", client->rect.x, client->rect.y);
 504                 uint32_t relative_x = client->rect.x - old_ws->rect.x,
 505                          relative_y = client->rect.y - old_ws->rect.y;
 506                 LOG("rel_x = %d, rel_y = %d\n", relative_x, relative_y);
 507                 client->rect.x = t_ws->rect.x + relative_x;
 508                 client->rect.y = t_ws->rect.y + relative_y;
 509                 LOG("after x = %d, y = %d\n", client->rect.x, client->rect.y);
 510                 reposition_client(conn, client);
 511                 xcb_flush(conn);
 512         }
 513
 514         LOG("done\n");
 515
 516         render_layout(conn);
 517
 518         if (!target_invisible)
 519                 set_focus(conn, client, true);
 520 }
 521
 522 /*
 523  * Moves the currently selected window to the given workspace
 524  *
 525  */
 526 static void move_current_window_to_workspace(xcb_connection_t *conn, int workspace) {
 527         LOG("Moving current window to workspace %d\n", workspace);
 528
 529         Container *container = CUR_CELL;
 530
 531         assert(container != NULL);
 532
 533         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 534         Workspace *t_ws = &(workspaces[workspace-1]);
 535
 536         Client *current_client = container->currently_focused;
 537         if (current_client == NULL) {
 538                 LOG("No currently focused client in current container.\n");
 539                 return;
 540         }
 541         Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 542         if (to_focus == NULL)
 543                 to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 544
 545         if (t_ws->screen == NULL) {
 546                 LOG("initializing new workspace, setting num to %d\n", workspace-1);
 547                 t_ws->screen = container->workspace->screen;
 548                 /* Copy the dimensions from the virtual screen */
 549                 memcpy(&(t_ws->rect), &(container->workspace->screen->rect), sizeof(Rect));
 550         } else {
 551                 /* Check if there is already a fullscreen client on the destination workspace and
 552                  * stop moving if so. */
 553                 if (current_client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 554                         LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 555                         return;
 556                 }
 557         }
 558
 559         Container *to_container = t_ws->table[t_ws->current_col][t_ws->current_row];
 560
 561         assert(to_container != NULL);
 562
 563         client_remove_from_container(conn, current_client, container, true);
 564         if (container->workspace->fullscreen_client == current_client)
 565                 container->workspace->fullscreen_client = NULL;
 566
 567         /* TODO: insert it to the correct position */
 568         CIRCLEQ_INSERT_TAIL(&(to_container->clients), current_client, clients);
 569
 570         SLIST_INSERT_HEAD(&(to_container->workspace->focus_stack), current_client, focus_clients);
 571         LOG("Moved.\n");
 572
 573         current_client->container = to_container;
 574         current_client->workspace = to_container->workspace;
 575         container->currently_focused = to_focus;
 576         to_container->currently_focused = current_client;
 577
 578         bool target_invisible = (to_container->workspace->screen->current_workspace != to_container->workspace->num);
 579
 580         /* If we’re moving it to an invisible screen, we need to unmap it */
 581         if (target_invisible) {
 582                 LOG("This workspace is not visible, unmapping\n");
 583                 xcb_unmap_window(conn, current_client->frame);
 584         } else {
 585                 if (current_client->fullscreen) {
 586                         LOG("Calling client_enter_fullscreen again\n");
 587                         client_enter_fullscreen(conn, current_client);
 588                 }
 589         }
 590
 591         /* delete all empty columns/rows */
 592         cleanup_table(conn, container->workspace);
 593
 594         render_layout(conn);
 595
 596         if (!target_invisible)
 597                 set_focus(conn, current_client, true);
 598 }
 599
 600 /*
 601  * Switches to the given workspace
 602  *
 603  */
 604 void show_workspace(xcb_connection_t *conn, int workspace) {
 605         Client *client;
 606         bool need_warp = false;
 607         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
 608         /* t_ws (to workspace) is just a convenience pointer to the workspace we’re switching to */
 609         Workspace *t_ws = &(workspaces[workspace-1]);
 610
 611         LOG("show_workspace(%d)\n", workspace);
 612
 613         /* Store current_row/current_col */
 614         c_ws->current_row = current_row;
 615         c_ws->current_col = current_col;
 616
 617         /* Check if the workspace has not been used yet */
 618         if (t_ws->screen == NULL) {
 619                 LOG("initializing new workspace, setting num to %d\n", workspace);
 620                 t_ws->screen = c_ws->screen;
 621                 /* Copy the dimensions from the virtual screen */
 622                 memcpy(&(t_ws->rect), &(t_ws->screen->rect), sizeof(Rect));
 623         }
 624
 625         if (c_ws->screen != t_ws->screen) {
 626                 /* We need to switch to the other screen first */
 627                 LOG("moving over to other screen.\n");
 628
 629                 /* Store the old client */
 630                 Client *old_client = CUR_CELL->currently_focused;
 631
 632                 c_ws = &(workspaces[t_ws->screen->current_workspace]);
 633                 current_col = c_ws->current_col;
 634                 current_row = c_ws->current_row;
 635                 if (CUR_CELL->currently_focused != NULL)
 636                         need_warp = true;
 637                 else {
 638                         Rect *dims = &(c_ws->screen->rect);
 639                         xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0,
 640                                          dims->x + (dims->width / 2), dims->y + (dims->height / 2));
 641                 }
 642
 643                 /* Re-decorate the old client, it’s not focused anymore */
 644                 if ((old_client != NULL) && !old_client->dock)
 645                         redecorate_window(conn, old_client);
 646                 else xcb_flush(conn);
 647         }
 648
 649         /* Check if we need to change something or if we’re already there */
 650         if (c_ws->screen->current_workspace == (workspace-1)) {
 651                 Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 652                 if (last_focused != SLIST_END(&(c_ws->focus_stack))) {
 653                         set_focus(conn, last_focused, true);
 654                         if (need_warp) {
 655                                 client_warp_pointer_into(conn, last_focused);
 656                                 xcb_flush(conn);
 657                         }
 658                 }
 659
 660                 return;
 661         }
 662
 663         t_ws->screen->current_workspace = workspace-1;
 664         Workspace *old_workspace = c_ws;
 665         c_ws = &workspaces[workspace-1];
 666
 667         /* Unmap all clients of the old workspace */
 668         unmap_workspace(conn, old_workspace);
 669
 670         current_row = c_ws->current_row;
 671         current_col = c_ws->current_col;
 672         LOG("new current row = %d, current col = %d\n", current_row, current_col);
 673
 674         ignore_enter_notify_forall(conn, c_ws, true);
 675
 676         /* Map all clients on the new workspace */
 677         FOR_TABLE(c_ws)
 678                 CIRCLEQ_FOREACH(client, &(c_ws->table[cols][rows]->clients), clients)
 679                         xcb_map_window(conn, client->frame);
 680
 681         /* Map all floating clients */
 682         if (!c_ws->floating_hidden)
 683                 TAILQ_FOREACH(client, &(c_ws->floating_clients), floating_clients)
 684                         xcb_map_window(conn, client->frame);
 685
 686         /* Map all stack windows, if any */
 687         struct Stack_Window *stack_win;
 688         SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
 689                 if (stack_win->container->workspace == c_ws)
 690                         xcb_map_window(conn, stack_win->window);
 691
 692         ignore_enter_notify_forall(conn, c_ws, false);
 693
 694         /* Restore focus on the new workspace */
 695         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 696         if (last_focused != SLIST_END(&(c_ws->focus_stack))) {
 697                 set_focus(conn, last_focused, true);
 698                 if (need_warp) {
 699                         client_warp_pointer_into(conn, last_focused);
 700                         xcb_flush(conn);
 701                 }
 702         } else xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
 703
 704         render_layout(conn);
 705 }
 706
 707 /*
 708  * Jumps to the given window class / title.
 709  * Title is matched using strstr, that is, matches if it appears anywhere
 710  * in the string. Regular expressions seem to be a bit overkill here. However,
 711  * if we need them for something else somewhen, we may introduce them here, too.
 712  *
 713  */
 714 static void jump_to_window(xcb_connection_t *conn, const char *arguments) {
 715         char *classtitle;
 716         Client *client;
 717
 718         /* The first character is a quote, this was checked before */
 719         classtitle = sstrdup(arguments+1);
 720         /* The last character is a quote, we just set it to NULL */
 721         classtitle[strlen(classtitle)-1] = '\0';
 722
 723         if ((client = get_matching_client(conn, classtitle, NULL)) == NULL) {
 724                 free(classtitle);
 725                 LOG("No matching client found.\n");
 726                 return;
 727         }
 728
 729         free(classtitle);
 730         set_focus(conn, client, true);
 731 }
 732
 733 /*
 734  * Jump directly to the specified workspace, row and col.
 735  * Great for reaching windows that you always keep in the same spot (hello irssi, I'm looking at you)
 736  *
 737  */
 738 static void jump_to_container(xcb_connection_t *conn, const char *arguments) {
 739         int ws, row, col;
 740         int result;
 741
 742         result = sscanf(arguments, "%d %d %d", &ws, &col, &row);
 743         LOG("Jump called with %d parameters (\"%s\")\n", result, arguments);
 744
 745         /* No match? Either no arguments were specified, or no numbers */
 746         if (result < 1) {
 747                 LOG("At least one valid argument required\n");
 748                 return;
 749         }
 750
 751         /* Move to the target workspace */
 752         show_workspace(conn, ws);
 753
 754         if (result < 3)
 755                 return;
 756
 757         LOG("Boundary-checking col %d, row %d... (max cols %d, max rows %d)\n", col, row, c_ws->cols, c_ws->rows);
 758
 759         /* Move to row/col */
 760         if (row >= c_ws->rows)
 761                 row = c_ws->rows - 1;
 762         if (col >= c_ws->cols)
 763                 col = c_ws->cols - 1;
 764
 765         LOG("Jumping to col %d, row %d\n", col, row);
 766         if (c_ws->table[col][row]->currently_focused != NULL)
 767                 set_focus(conn, c_ws->table[col][row]->currently_focused, true);
 768 }
 769
 770 /*
 771  * Travels the focus stack by the given number of times (or once, if no argument
 772  * was specified). That is, selects the window you were in before you focused
 773  * the current window.
 774  *
 775  * The special values 'floating' (select the next floating window), 'tiling'
 776  * (select the next tiling window), 'ft' (if the current window is floating,
 777  * select the next tiling window and vice-versa) are also valid
 778  *
 779  */
 780 static void travel_focus_stack(xcb_connection_t *conn, const char *arguments) {
 781         /* Start count at -1 to always skip the first element */
 782         int times, count = -1;
 783         Client *current;
 784         bool floating_criteria;
 785
 786         /* Either it’s one of the special values… */
 787         if (strcasecmp(arguments, "floating") == 0) {
 788                 floating_criteria = true;
 789         } else if (strcasecmp(arguments, "tiling") == 0) {
 790                 floating_criteria = false;
 791         } else if (strcasecmp(arguments, "ft") == 0) {
 792                 Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 793                 if (last_focused == SLIST_END(&(c_ws->focus_stack))) {
 794                         LOG("Cannot select the next floating/tiling client because there is no client at all\n");
 795                         return;
 796                 }
 797
 798                 floating_criteria = !client_is_floating(last_focused);
 799         } else {
 800                 /* …or a number was specified */
 801                 if (sscanf(arguments, "%u", &times) != 1) {
 802                         LOG("No or invalid argument given (\"%s\"), using default of 1 times\n", arguments);
 803                         times = 1;
 804                 }
 805
 806                 SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients) {
 807                         if (++count < times) {
 808                                 LOG("Skipping\n");
 809                                 continue;
 810                         }
 811
 812                         LOG("Focussing\n");
 813                         set_focus(conn, current, true);
 814                         break;
 815                 }
 816                 return;
 817         }
 818
 819         /* Select the next client matching the criteria parsed above */
 820         SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients)
 821                 if (client_is_floating(current) == floating_criteria) {
 822                         set_focus(conn, current, true);
 823                         break;
 824                 }
 825 }
 826
 827 /*
 828  * Goes through the list of arguments (for exec()) and checks if the given argument
 829  * is present. If not, it copies the arguments (because we cannot realloc it) and
 830  * appends the given argument.
 831  *
 832  */
 833 static char **append_argument(char **original, char *argument) {
 834         int num_args;
 835         for (num_args = 0; original[num_args] != NULL; num_args++) {
 836                 LOG("original argument: \"%s\"\n", original[num_args]);
 837                 /* If the argument is already present we return the original pointer */
 838                 if (strcmp(original[num_args], argument) == 0)
 839                         return original;
 840         }
 841         /* Copy the original array */
 842         char **result = smalloc((num_args+2) * sizeof(char*));
 843         memcpy(result, original, num_args * sizeof(char*));
 844         result[num_args] = argument;
 845         result[num_args+1] = NULL;
 846
 847         return result;
 848 }
 849
 850 /*
 851  * Switch to next or previous existing workspace
 852  *
 853  */
 854 static void next_previous_workspace(xcb_connection_t *conn, int direction) {
 855         Workspace *t_ws;
 856         int i;
 857
 858         if (direction == 'n') {
 859                 /* If we are on the last workspace, we cannot go any further */
 860                 if (c_ws->num == 9)
 861                         return;
 862
 863                 for (i = c_ws->num + 1; i <= 9; i++) {
 864                         t_ws = &(workspaces[i]);
 865                         if (t_ws->screen != NULL)
 866                                 break;
 867                 }
 868         } else if (direction == 'p') {
 869                 if (c_ws->num == 0)
 870                         return;
 871                 for (i = c_ws->num - 1; i >= 0 ; i--) {
 872                         t_ws = &(workspaces[i]);
 873                         if (t_ws->screen != NULL)
 874                                 break;
 875                 }
 876         }
 877
 878         if (t_ws->screen != NULL)
 879                 show_workspace(conn, i+1);
 880 }
 881
 882 /*
 883  * Parses a command, see file CMDMODE for more information
 884  *
 885  */
 886 void parse_command(xcb_connection_t *conn, const char *command) {
 887         LOG("--- parsing command \"%s\" ---\n", command);
 888         /* Get the first client from focus stack because floating clients are not
 889          * in any container, therefore CUR_CELL is not appropriate. */
 890         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 891         if (last_focused == SLIST_END(&(c_ws->focus_stack)))
 892                 last_focused = NULL;
 893
 894         /* Hmm, just to be sure */
 895         if (command[0] == '\0')
 896                 return;
 897
 898         /* Is it an <exec>? Then execute the given command. */
 899         if (STARTS_WITH(command, "exec ")) {
 900                 LOG("starting \"%s\"\n", command + strlen("exec "));
 901                 start_application(command+strlen("exec "));
 902                 return;
 903         }
 904
 905         /* Is it an <exit>? */
 906         if (STARTS_WITH(command, "exit")) {
 907                 LOG("User issued exit-command, exiting without error.\n");
 908                 exit(EXIT_SUCCESS);
 909         }
 910
 911         /* Is it a <reload>? */
 912         if (STARTS_WITH(command, "reload")) {
 913                 load_configuration(conn, NULL, true);
 914                 return;
 915         }
 916
 917         /* Is it <restart>? Then restart in place. */
 918         if (STARTS_WITH(command, "restart")) {
 919                 LOG("restarting \"%s\"...\n", start_argv[0]);
 920                 /* make sure -a is in the argument list or append it */
 921                 start_argv = append_argument(start_argv, "-a");
 922
 923                 execvp(start_argv[0], start_argv);
 924                 /* not reached */
 925         }
 926
 927         if (STARTS_WITH(command, "kill")) {
 928                 if (last_focused == NULL) {
 929                         LOG("There is no window to kill\n");
 930                         return;
 931                 }
 932
 933                 LOG("Killing current window\n");
 934                 client_kill(conn, last_focused);
 935                 return;
 936         }
 937
 938         /* Is it a jump to a specified workspace, row, col? */
 939         if (STARTS_WITH(command, "jump ")) {
 940                 const char *arguments = command + strlen("jump ");
 941                 if (arguments[0] == '"')
 942                         jump_to_window(conn, arguments);
 943                 else jump_to_container(conn, arguments);
 944                 return;
 945         }
 946
 947         /* Should we travel the focus stack? */
 948         if (STARTS_WITH(command, "focus")) {
 949                 const char *arguments = command + strlen("focus ");
 950                 travel_focus_stack(conn, arguments);
 951                 return;
 952         }
 953
 954         /* Is it 'f' for fullscreen? */
 955         if (command[0] == 'f') {
 956                 if (last_focused == NULL)
 957                         return;
 958                 client_toggle_fullscreen(conn, last_focused);
 959                 return;
 960         }
 961
 962         /* Is it just 's' for stacking or 'd' for default? */
 963         if ((command[0] == 's' || command[0] == 'd') && (command[1] == '\0')) {
 964                 if (last_focused == NULL || client_is_floating(last_focused)) {
 965                         LOG("not switching, this is a floating client\n");
 966                         return;
 967                 }
 968                 LOG("Switching mode for current container\n");
 969                 switch_layout_mode(conn, CUR_CELL, (command[0] == 's' ? MODE_STACK : MODE_DEFAULT));
 970                 return;
 971         }
 972
 973         if (command[0] == 'H') {
 974                 LOG("Hiding all floating windows\n");
 975                 floating_toggle_hide(conn, c_ws);
 976                 return;
 977         }
 978
 979         enum { WITH_WINDOW, WITH_CONTAINER, WITH_WORKSPACE } with = WITH_WINDOW;
 980
 981         /* Is it a <with>? */
 982         if (command[0] == 'w') {
 983                 command++;
 984                 /* TODO: implement */
 985                 if (command[0] == 'c') {
 986                         with = WITH_CONTAINER;
 987                         command++;
 988                 } else if (command[0] == 'w') {
 989                         with = WITH_WORKSPACE;
 990                         command++;
 991                 } else {
 992                         LOG("not yet implemented.\n");
 993                         return;
 994                 }
 995         }
 996
 997         /* Is it 't' for toggle tiling/floating? */
 998         if (command[0] == 't') {
 999                 if (with == WITH_WORKSPACE) {
1000                         c_ws->auto_float = !c_ws->auto_float;
1001                         LOG("autofloat is now %d\n", c_ws->auto_float);
1002                         return;
1003                 }
1004                 if (last_focused == NULL) {
1005                         LOG("Cannot toggle tiling/floating: workspace empty\n");
1006                         return;
1007                 }
1008
1009                 toggle_floating_mode(conn, last_focused, false);
1010                 /* delete all empty columns/rows */
1011                 cleanup_table(conn, last_focused->workspace);
1012
1013                 /* Fix colspan/rowspan if it’d overlap */
1014                 fix_colrowspan(conn, last_focused->workspace);
1015
1016                 render_workspace(conn, last_focused->workspace->screen, last_focused->workspace);
1017
1018                 /* Re-focus the client because cleanup_table sets the focus to the last
1019                  * focused client inside a container only. */
1020                 set_focus(conn, last_focused, true);
1021
1022                 return;
1023         }
1024
1025         /* Is it 'n' or 'p' for next/previous workspace? (nw) */
1026         if (command[0] == 'n' && command[1] == 'w') {
1027                next_previous_workspace(conn, command[0]);
1028                return;
1029         }
1030
1031         if (command[0] == 'p' && command[1] == 'w') {
1032                next_previous_workspace(conn, command[0]);
1033                return;
1034         }
1035
1036         /* It’s a normal <cmd> */
1037         char *rest = NULL;
1038         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
1039         direction_t direction;
1040         int times = strtol(command, &rest, 10);
1041         if (rest == NULL) {
1042                 LOG("Invalid command (\"%s\")\n", command);
1043                 return;
1044         }
1045
1046         if (*rest == '\0') {
1047                 /* No rest? This was a workspace number, not a times specification */
1048                 show_workspace(conn, times);
1049                 return;
1050         }
1051
1052         if (*rest == 'm' || *rest == 's') {
1053                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
1054                 rest++;
1055         }
1056
1057         int workspace = strtol(rest, &rest, 10);
1058
1059         if (rest == NULL) {
1060                 LOG("Invalid command (\"%s\")\n", command);
1061                 return;
1062         }
1063
1064         if (*rest == '\0') {
1065                 if (last_focused != NULL && client_is_floating(last_focused))
1066                         move_floating_window_to_workspace(conn, last_focused, workspace);
1067                 else move_current_window_to_workspace(conn, workspace);
1068                 return;
1069         }
1070
1071         if (last_focused == NULL) {
1072                 LOG("Not performing (no window found)\n");
1073                 return;
1074         }
1075
1076         if (client_is_floating(last_focused) &&
1077             (action != ACTION_FOCUS && action != ACTION_MOVE)) {
1078                 LOG("Not performing (floating)\n");
1079                 return;
1080         }
1081
1082         /* Now perform action to <where> */
1083         while (*rest != '\0') {
1084                 if (*rest == 'h')
1085                         direction = D_LEFT;
1086                 else if (*rest == 'j')
1087                         direction = D_DOWN;
1088                 else if (*rest == 'k')
1089                         direction = D_UP;
1090                 else if (*rest == 'l')
1091                         direction = D_RIGHT;
1092                 else {
1093                         LOG("unknown direction: %c\n", *rest);
1094                         return;
1095                 }
1096                 rest++;
1097
1098                 if (action == ACTION_FOCUS) {
1099                         if (client_is_floating(last_focused)) {
1100                                 floating_focus_direction(conn, last_focused, direction);
1101                                 continue;
1102                         }
1103                         focus_thing(conn, direction, (with == WITH_WINDOW ? THING_WINDOW : THING_CONTAINER));
1104                         continue;
1105                 }
1106
1107                 if (action == ACTION_MOVE) {
1108                         if (client_is_floating(last_focused)) {
1109                                 floating_move(conn, last_focused, direction);
1110                                 continue;
1111                         }
1112                         if (with == WITH_WINDOW)
1113                                 move_current_window(conn, direction);
1114                         else move_current_container(conn, direction);
1115                         continue;
1116                 }
1117
1118                 if (action == ACTION_SNAP) {
1119                         snap_current_container(conn, direction);
1120                         continue;
1121                 }
1122         }
1123
1124         LOG("--- done ---\n");
1125 }