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  * © 2009-2010 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 "randr.h"
  26 #include "client.h"
  27 #include "floating.h"
  28 #include "xcb.h"
  29 #include "config.h"
  30 #include "workspace.h"
  31 #include "commands.h"
  32 #include "resize.h"
  33 #include "log.h"
  34 #include "sighandler.h"
  35 #include "manage.h"
  36
  37 bool focus_window_in_container(xcb_connection_t *conn, Container *container, direction_t direction) {
  38         /* If this container is empty, we’re done */
  39         if (container->currently_focused == NULL)
  40                 return false;
  41
  42         /* Get the previous/next client or wrap around */
  43         Client *candidate = NULL;
  44         if (direction == D_UP) {
  45                 if ((candidate = CIRCLEQ_PREV_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  46                         candidate = CIRCLEQ_LAST(&(container->clients));
  47         }
  48         else if (direction == D_DOWN) {
  49                 if ((candidate = CIRCLEQ_NEXT_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  50                         candidate = CIRCLEQ_FIRST(&(container->clients));
  51         } else ELOG("Direction not implemented!\n");
  52
  53         /* If we could not switch, the container contains exactly one client. We return false */
  54         if (candidate == container->currently_focused)
  55                 return false;
  56
  57         /* Set focus */
  58         set_focus(conn, candidate, true);
  59
  60         return true;
  61 }
  62
  63 typedef enum { THING_WINDOW, THING_CONTAINER, THING_SCREEN } thing_t;
  64
  65 static void jump_to_mark(xcb_connection_t *conn, const char *mark) {
  66         Client *current;
  67         LOG("Jumping to \"%s\"\n", mark);
  68
  69         Workspace *ws;
  70         TAILQ_FOREACH(ws, workspaces, workspaces)
  71                 SLIST_FOREACH(current, &(ws->focus_stack), focus_clients) {
  72                         if (current->mark == NULL || strcmp(current->mark, mark) != 0)
  73                                 continue;
  74
  75                         workspace_show(conn, current->workspace->num + 1);
  76                         set_focus(conn, current, true);
  77                         return;
  78                 }
  79
  80         ELOG("No window with this mark found\n");
  81 }
  82
  83 static void focus_thing(xcb_connection_t *conn, direction_t direction, thing_t thing) {
  84         DLOG("focusing direction %d\n", direction);
  85
  86         int new_row = current_row,
  87             new_col = current_col;
  88         Container *container = CUR_CELL;
  89         Workspace *t_ws = c_ws;
  90
  91         /* Makes sure new_col and new_row are within bounds of the new workspace */
  92 #define CHECK_COLROW_BOUNDARIES \
  93         do { \
  94                 if (new_col >= t_ws->cols) \
  95                         new_col = (t_ws->cols - 1); \
  96                 if (new_row >= t_ws->rows) \
  97                         new_row = (t_ws->rows - 1); \
  98         } while (0)
  99
 100         /* There always is a container. If not, current_col or current_row is wrong */
 101         assert(container != NULL);
 102
 103         if (container->workspace->fullscreen_client != NULL) {
 104                 LOG("You're in fullscreen mode. Forcing focus to operate on whole screens\n");
 105                 thing = THING_SCREEN;
 106         }
 107
 108         /* For focusing screens, situation is different: we get the rect
 109          * of the current screen, then get the screen which is on its
 110          * right/left/bottom/top and just switch to the workspace on
 111          * the target screen. */
 112         if (thing == THING_SCREEN) {
 113                 Output *cs = c_ws->output;
 114                 assert(cs != NULL);
 115                 Rect bounds = cs->rect;
 116
 117                 if (direction == D_RIGHT)
 118                         bounds.x += bounds.width;
 119                 else if (direction == D_LEFT)
 120                         bounds.x -= bounds.width;
 121                 else if (direction == D_UP)
 122                         bounds.y -= bounds.height;
 123                 else bounds.y += bounds.height;
 124
 125                 Output *target = get_output_containing(bounds.x, bounds.y);
 126                 if (target == NULL) {
 127                         DLOG("Target output NULL\n");
 128                         /* Wrap around if the target screen is out of bounds */
 129                         if (direction == D_RIGHT)
 130                                 target = get_output_most(D_LEFT, cs);
 131                         else if (direction == D_LEFT)
 132                                 target = get_output_most(D_RIGHT, cs);
 133                         else if (direction == D_UP)
 134                                 target = get_output_most(D_DOWN, cs);
 135                         else target = get_output_most(D_UP, cs);
 136                 }
 137
 138                 DLOG("Switching to ws %d\n", target->current_workspace + 1);
 139                 workspace_show(conn, target->current_workspace->num + 1);
 140                 return;
 141         }
 142
 143         /* TODO: for horizontal default layout, this has to be expanded to LEFT/RIGHT */
 144         if (direction == D_UP || direction == D_DOWN) {
 145                 if (thing == THING_WINDOW)
 146                         /* Let’s see if we can perform up/down focus in the current container */
 147                         if (focus_window_in_container(conn, container, direction))
 148                                 return;
 149
 150                 if (direction == D_DOWN && cell_exists(t_ws, current_col, current_row+1))
 151                         new_row = current_row + t_ws->table[current_col][current_row]->rowspan;
 152                 else if (direction == D_UP && cell_exists(c_ws, current_col, current_row-1)) {
 153                         /* Set new_row as a sane default, but it may get overwritten in a second */
 154                         new_row--;
 155
 156                         /* Search from the top to correctly handle rowspanned containers */
 157                         for (int rows = 0; rows < current_row; rows += t_ws->table[current_col][rows]->rowspan) {
 158                                 if (new_row > (rows + (t_ws->table[current_col][rows]->rowspan - 1)))
 159                                         continue;
 160
 161                                 new_row = rows;
 162                                 break;
 163                         }
 164                 } else {
 165                         /* Let’s see if there is a screen down/up there to which we can switch */
 166                         DLOG("container is at %d with height %d\n", container->y, container->height);
 167                         Output *output;
 168                         int destination_y = (direction == D_UP ? (container->y - 1) : (container->y + container->height + 1));
 169                         if ((output = get_output_containing(container->x, destination_y)) == NULL) {
 170                                 DLOG("Wrapping screen around vertically\n");
 171                                 /* No screen found? Then wrap */
 172                                 output = get_output_most((direction == D_UP ? D_DOWN : D_UP), container->workspace->output);
 173                         }
 174                         t_ws = output->current_workspace;
 175                         new_row = (direction == D_UP ? (t_ws->rows - 1) : 0);
 176                 }
 177
 178                 CHECK_COLROW_BOUNDARIES;
 179
 180                 DLOG("new_col = %d, new_row = %d\n", new_col, new_row);
 181                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
 182                         DLOG("Cell empty, checking for colspanned client above...\n");
 183                         for (int cols = 0; cols < new_col; cols += t_ws->table[cols][new_row]->colspan) {
 184                                 if (new_col > (cols + (t_ws->table[cols][new_row]->colspan - 1)))
 185                                         continue;
 186
 187                                 new_col = cols;
 188                                 break;
 189                         }
 190                         DLOG("Fixed it to new col %d\n", new_col);
 191                 }
 192         } else if (direction == D_LEFT || direction == D_RIGHT) {
 193                 if (direction == D_RIGHT && cell_exists(t_ws, current_col+1, current_row))
 194                         new_col = current_col + t_ws->table[current_col][current_row]->colspan;
 195                 else if (direction == D_LEFT && cell_exists(t_ws, current_col-1, current_row)) {
 196                         /* Set new_col as a sane default, but it may get overwritten in a second */
 197                         new_col--;
 198
 199                         /* Search from the left to correctly handle colspanned containers */
 200                         for (int cols = 0; cols < current_col; cols += t_ws->table[cols][current_row]->colspan) {
 201                                 if (new_col > (cols + (t_ws->table[cols][current_row]->colspan - 1)))
 202                                         continue;
 203
 204                                 new_col = cols;
 205                                 break;
 206                         }
 207                 } else {
 208                         /* Let’s see if there is a screen left/right here to which we can switch */
 209                         DLOG("container is at %d with width %d\n", container->x, container->width);
 210                         Output *output;
 211                         int destination_x = (direction == D_LEFT ? (container->x - 1) : (container->x + container->width + 1));
 212                         if ((output = get_output_containing(destination_x, container->y)) == NULL) {
 213                                 DLOG("Wrapping screen around horizontally\n");
 214                                 output = get_output_most((direction == D_LEFT ? D_RIGHT : D_LEFT), container->workspace->output);
 215                         }
 216                         t_ws = output->current_workspace;
 217                         new_col = (direction == D_LEFT ? (t_ws->cols - 1) : 0);
 218                 }
 219
 220                 CHECK_COLROW_BOUNDARIES;
 221
 222                 DLOG("new_col = %d, new_row = %d\n", new_col, new_row);
 223                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
 224                         DLOG("Cell empty, checking for rowspanned client above...\n");
 225                         for (int rows = 0; rows < new_row; rows += t_ws->table[new_col][rows]->rowspan) {
 226                                 if (new_row > (rows + (t_ws->table[new_col][rows]->rowspan - 1)))
 227                                         continue;
 228
 229                                 new_row = rows;
 230                                 break;
 231                         }
 232                         DLOG("Fixed it to new row %d\n", new_row);
 233                 }
 234         } else {
 235                 ELOG("direction unhandled\n");
 236                 return;
 237         }
 238
 239         CHECK_COLROW_BOUNDARIES;
 240
 241         if (t_ws->table[new_col][new_row]->currently_focused != NULL)
 242                 set_focus(conn, t_ws->table[new_col][new_row]->currently_focused, true);
 243 }
 244
 245 /*
 246  * Tries to move the window inside its current container.
 247  *
 248  * Returns true if the window could be moved, false otherwise.
 249  *
 250  */
 251 static bool move_current_window_in_container(xcb_connection_t *conn, Client *client,
 252                 direction_t direction) {
 253         assert(client->container != NULL);
 254
 255         Client *other = (direction == D_UP ? CIRCLEQ_PREV(client, clients) :
 256                                              CIRCLEQ_NEXT(client, clients));
 257
 258         if (other == CIRCLEQ_END(&(client->container->clients)))
 259                 return false;
 260
 261         DLOG("i can do that\n");
 262         /* We can move the client inside its current container */
 263         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 264         if (direction == D_UP)
 265                 CIRCLEQ_INSERT_BEFORE(&(client->container->clients), other, client, clients);
 266         else CIRCLEQ_INSERT_AFTER(&(client->container->clients), other, client, clients);
 267         render_layout(conn);
 268         return true;
 269 }
 270
 271 /*
 272  * Moves the current window or whole container to the given direction, creating a column/row if
 273  * necessary.
 274  *
 275  */
 276 static void move_current_window(xcb_connection_t *conn, direction_t direction) {
 277         LOG("moving window to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 278                                             (direction == D_LEFT ? "left" : "right"))));
 279         /* Get current window */
 280         Container *container = CUR_CELL,
 281                   *new = NULL;
 282
 283         /* There has to be a container, see focus_window() */
 284         assert(container != NULL);
 285
 286         /* If there is no window or the dock window is focused, we’re done */
 287         if (container->currently_focused == NULL ||
 288             container->currently_focused->dock)
 289                 return;
 290
 291         /* As soon as the client is moved away, the last focused client in the old
 292          * container needs to get focus, if any. Therefore, we save it here. */
 293         Client *current_client = container->currently_focused;
 294         Client *to_focus = get_last_focused_client(conn, container, current_client);
 295
 296         if (to_focus == NULL) {
 297                 to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 298                 if (to_focus == NULL)
 299                         to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 300         }
 301
 302         switch (direction) {
 303                 case D_LEFT:
 304                         /* If we’re at the left-most position, move the rest of the table right */
 305                         if (current_col == 0) {
 306                                 expand_table_cols_at_head(c_ws);
 307                                 new = CUR_CELL;
 308                         } else
 309                                 new = CUR_TABLE[--current_col][current_row];
 310                         break;
 311                 case D_RIGHT:
 312                         if (current_col == (c_ws->cols-1))
 313                                 expand_table_cols(c_ws);
 314
 315                         new = CUR_TABLE[++current_col][current_row];
 316                         break;
 317                 case D_UP:
 318                         if (move_current_window_in_container(conn, current_client, D_UP))
 319                                 return;
 320
 321                         /* if we’re at the up-most position, move the rest of the table down */
 322                         if (current_row == 0) {
 323                                 expand_table_rows_at_head(c_ws);
 324                                 new = CUR_CELL;
 325                         } else
 326                                 new = CUR_TABLE[current_col][--current_row];
 327                         break;
 328                 case D_DOWN:
 329                         if (move_current_window_in_container(conn, current_client, D_DOWN))
 330                                 return;
 331
 332                         if (current_row == (c_ws->rows-1))
 333                                 expand_table_rows(c_ws);
 334
 335                         new = CUR_TABLE[current_col][++current_row];
 336                         break;
 337                 /* To make static analyzers happy: */
 338                 default:
 339                         return;
 340         }
 341
 342         /* Remove it from the old container and put it into the new one */
 343         client_remove_from_container(conn, current_client, container, true);
 344
 345         if (new->currently_focused != NULL)
 346                 CIRCLEQ_INSERT_AFTER(&(new->clients), new->currently_focused, current_client, clients);
 347         else CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
 348         SLIST_INSERT_HEAD(&(new->workspace->focus_stack), current_client, focus_clients);
 349
 350         /* Update data structures */
 351         current_client->container = new;
 352         current_client->workspace = new->workspace;
 353         container->currently_focused = to_focus;
 354         new->currently_focused = current_client;
 355
 356         Workspace *workspace = container->workspace;
 357
 358         /* delete all empty columns/rows */
 359         cleanup_table(conn, workspace);
 360
 361         /* Fix colspan/rowspan if it’d overlap */
 362         fix_colrowspan(conn, workspace);
 363
 364         render_workspace(conn, workspace->output, workspace);
 365         xcb_flush(conn);
 366
 367         set_focus(conn, current_client, true);
 368 }
 369
 370 static void move_current_container(xcb_connection_t *conn, direction_t direction) {
 371         LOG("moving container to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 372                                             (direction == D_LEFT ? "left" : "right"))));
 373         /* Get current window */
 374         Container *container = CUR_CELL,
 375                   *new = NULL;
 376
 377         Container **old = &CUR_CELL;
 378
 379         /* There has to be a container, see focus_window() */
 380         assert(container != NULL);
 381
 382         switch (direction) {
 383                 case D_LEFT:
 384                         /* If we’re at the left-most position, move the rest of the table right */
 385                         if (current_col == 0) {
 386                                 expand_table_cols_at_head(c_ws);
 387                                 new = CUR_CELL;
 388                                 old = &CUR_TABLE[current_col+1][current_row];
 389                         } else
 390                                 new = CUR_TABLE[--current_col][current_row];
 391                         break;
 392                 case D_RIGHT:
 393                         if (current_col == (c_ws->cols-1))
 394                                 expand_table_cols(c_ws);
 395
 396                         new = CUR_TABLE[++current_col][current_row];
 397                         break;
 398                 case D_UP:
 399                         /* if we’re at the up-most position, move the rest of the table down */
 400                         if (current_row == 0) {
 401                                 expand_table_rows_at_head(c_ws);
 402                                 new = CUR_CELL;
 403                                 old = &CUR_TABLE[current_col][current_row+1];
 404                         } else
 405                                 new = CUR_TABLE[current_col][--current_row];
 406                         break;
 407                 case D_DOWN:
 408                         if (current_row == (c_ws->rows-1))
 409                                 expand_table_rows(c_ws);
 410
 411                         new = CUR_TABLE[current_col][++current_row];
 412                         break;
 413                 /* To make static analyzers happy: */
 414                 default:
 415                         return;
 416         }
 417
 418         DLOG("old = %d,%d and new = %d,%d\n", container->col, container->row, new->col, new->row);
 419
 420         /* Swap the containers */
 421         int col = new->col;
 422         int row = new->row;
 423
 424         *old = new;
 425         new->col = container->col;
 426         new->row = container->row;
 427
 428         CUR_CELL = container;
 429         container->col = col;
 430         container->row = row;
 431
 432         Workspace *workspace = container->workspace;
 433
 434         /* delete all empty columns/rows */
 435         cleanup_table(conn, workspace);
 436
 437         /* Fix colspan/rowspan if it’d overlap */
 438         fix_colrowspan(conn, workspace);
 439
 440         render_layout(conn);
 441 }
 442
 443 /*
 444  * "Snaps" the current container (not possible for windows, because it works at table base)
 445  * to the given direction, that is, adjusts cellspan/rowspan
 446  *
 447  */
 448 static void snap_current_container(xcb_connection_t *conn, direction_t direction) {
 449         LOG("snapping container to direction %d\n", direction);
 450
 451         Container *container = CUR_CELL;
 452
 453         assert(container != NULL);
 454
 455         switch (direction) {
 456                 case D_LEFT:
 457                         /* Snap to the left is actually a move to the left and then a snap right */
 458                         if (!cell_exists(container->workspace, container->col - 1, container->row) ||
 459                             CUR_TABLE[container->col-1][container->row]->currently_focused != NULL) {
 460                                 ELOG("cannot snap to left - the cell is already used\n");
 461                                 return;
 462                         }
 463
 464                         move_current_window(conn, D_LEFT);
 465                         snap_current_container(conn, D_RIGHT);
 466                         return;
 467                 case D_RIGHT: {
 468                         /* Check if the cell is used */
 469                         int new_col = container->col + container->colspan;
 470                         for (int i = 0; i < container->rowspan; i++)
 471                                 if (!cell_exists(container->workspace, new_col, container->row + i) ||
 472                                     CUR_TABLE[new_col][container->row + i]->currently_focused != NULL) {
 473                                         ELOG("cannot snap to right - the cell is already used\n");
 474                                         return;
 475                                 }
 476
 477                         /* Check if there are other cells with rowspan, which are in our way.
 478                          * If so, reduce their rowspan. */
 479                         for (int i = container->row-1; i >= 0; i--) {
 480                                 DLOG("we got cell %d, %d with rowspan %d\n",
 481                                                 new_col, i, CUR_TABLE[new_col][i]->rowspan);
 482                                 while ((CUR_TABLE[new_col][i]->rowspan-1) >= (container->row - i))
 483                                         CUR_TABLE[new_col][i]->rowspan--;
 484                                 DLOG("new rowspan = %d\n", CUR_TABLE[new_col][i]->rowspan);
 485                         }
 486
 487                         container->colspan++;
 488                         break;
 489                 }
 490                 case D_UP:
 491                         if (!cell_exists(container->workspace, container->col, container->row - 1) ||
 492                             CUR_TABLE[container->col][container->row-1]->currently_focused != NULL) {
 493                                 ELOG("cannot snap to top - the cell is already used\n");
 494                                 return;
 495                         }
 496
 497                         move_current_window(conn, D_UP);
 498                         snap_current_container(conn, D_DOWN);
 499                         return;
 500                 case D_DOWN: {
 501                         DLOG("snapping down\n");
 502                         int new_row = container->row + container->rowspan;
 503                         for (int i = 0; i < container->colspan; i++)
 504                                 if (!cell_exists(container->workspace, container->col + i, new_row) ||
 505                                     CUR_TABLE[container->col + i][new_row]->currently_focused != NULL) {
 506                                         ELOG("cannot snap down - the cell is already used\n");
 507                                         return;
 508                                 }
 509
 510                         for (int i = container->col-1; i >= 0; i--) {
 511                                 DLOG("we got cell %d, %d with colspan %d\n",
 512                                                 i, new_row, CUR_TABLE[i][new_row]->colspan);
 513                                 while ((CUR_TABLE[i][new_row]->colspan-1) >= (container->col - i))
 514                                         CUR_TABLE[i][new_row]->colspan--;
 515                                 DLOG("new colspan = %d\n", CUR_TABLE[i][new_row]->colspan);
 516
 517                         }
 518
 519                         container->rowspan++;
 520                         break;
 521                 }
 522                 /* To make static analyzers happy: */
 523                 default:
 524                         return;
 525         }
 526
 527         render_layout(conn);
 528 }
 529
 530 static void move_floating_window_to_workspace(xcb_connection_t *conn, Client *client, int workspace) {
 531         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 532         Workspace *t_ws = workspace_get(workspace-1),
 533                   *old_ws = client->workspace;
 534
 535         LOG("moving floating\n");
 536
 537         workspace_initialize(t_ws, c_ws->output, false);
 538
 539         /* Check if there is already a fullscreen client on the destination workspace and
 540          * stop moving if so. */
 541         if (client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 542                 ELOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 543                 return;
 544         }
 545
 546         floating_assign_to_workspace(client, t_ws);
 547
 548         /* If we’re moving it to an invisible screen, we need to unmap it */
 549         if (!workspace_is_visible(t_ws)) {
 550                 DLOG("This workspace is not visible, unmapping\n");
 551                 client_unmap(conn, client);
 552         } else {
 553                 /* If this is not the case, we move the window to a workspace
 554                  * which is on another screen, so we also need to adjust its
 555                  * coordinates. */
 556                 DLOG("before x = %d, y = %d\n", client->rect.x, client->rect.y);
 557                 uint32_t relative_x = client->rect.x - old_ws->rect.x,
 558                          relative_y = client->rect.y - old_ws->rect.y;
 559                 DLOG("rel_x = %d, rel_y = %d\n", relative_x, relative_y);
 560                 client->rect.x = t_ws->rect.x + relative_x;
 561                 client->rect.y = t_ws->rect.y + relative_y;
 562                 DLOG("after x = %d, y = %d\n", client->rect.x, client->rect.y);
 563                 reposition_client(conn, client);
 564                 xcb_flush(conn);
 565         }
 566
 567         DLOG("done\n");
 568
 569         render_layout(conn);
 570
 571         if (workspace_is_visible(t_ws))
 572                 set_focus(conn, client, true);
 573 }
 574
 575 /*
 576  * Moves the currently selected window to the given workspace
 577  *
 578  */
 579 static void move_current_window_to_workspace(xcb_connection_t *conn, int workspace) {
 580         LOG("Moving current window to workspace %d\n", workspace);
 581
 582         Container *container = CUR_CELL;
 583
 584         assert(container != NULL);
 585
 586         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 587         Workspace *t_ws = workspace_get(workspace-1);
 588
 589         Client *current_client = container->currently_focused;
 590         if (current_client == NULL) {
 591                 ELOG("No currently focused client in current container.\n");
 592                 return;
 593         }
 594         Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 595         if (to_focus == NULL)
 596                 to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 597
 598         workspace_initialize(t_ws, container->workspace->output, false);
 599         /* Check if there is already a fullscreen client on the destination workspace and
 600          * stop moving if so. */
 601         if (current_client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 602                 ELOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 603                 return;
 604         }
 605
 606         Container *to_container = t_ws->table[t_ws->current_col][t_ws->current_row];
 607
 608         assert(to_container != NULL);
 609
 610         client_remove_from_container(conn, current_client, container, true);
 611         if (container->workspace->fullscreen_client == current_client)
 612                 container->workspace->fullscreen_client = NULL;
 613
 614         /* TODO: insert it to the correct position */
 615         CIRCLEQ_INSERT_TAIL(&(to_container->clients), current_client, clients);
 616
 617         SLIST_INSERT_HEAD(&(to_container->workspace->focus_stack), current_client, focus_clients);
 618         DLOG("Moved.\n");
 619
 620         current_client->container = to_container;
 621         current_client->workspace = to_container->workspace;
 622         container->currently_focused = to_focus;
 623         to_container->currently_focused = current_client;
 624
 625         /* If we’re moving it to an invisible screen, we need to unmap it */
 626         if (!workspace_is_visible(to_container->workspace)) {
 627                 DLOG("This workspace is not visible, unmapping\n");
 628                 client_unmap(conn, current_client);
 629         } else {
 630                 if (current_client->fullscreen) {
 631                         DLOG("Calling client_enter_fullscreen again\n");
 632                         client_enter_fullscreen(conn, current_client, false);
 633                 }
 634         }
 635
 636         /* delete all empty columns/rows */
 637         cleanup_table(conn, container->workspace);
 638
 639         render_layout(conn);
 640
 641         if (workspace_is_visible(to_container->workspace)) {
 642                 client_warp_pointer_into(conn, current_client);
 643                 set_focus(conn, current_client, true);
 644         }
 645 }
 646
 647 /*
 648  * Jumps to the given window class / title.
 649  * Title is matched using strstr, that is, matches if it appears anywhere
 650  * in the string. Regular expressions seem to be a bit overkill here. However,
 651  * if we need them for something else somewhen, we may introduce them here, too.
 652  *
 653  */
 654 static void jump_to_window(xcb_connection_t *conn, const char *arguments) {
 655         char *classtitle;
 656         Client *client;
 657
 658         /* The first character is a quote, this was checked before */
 659         classtitle = sstrdup(arguments+1);
 660         /* The last character is a quote, we just set it to NULL */
 661         classtitle[strlen(classtitle)-1] = '\0';
 662
 663         if ((client = get_matching_client(conn, classtitle, NULL)) == NULL) {
 664                 free(classtitle);
 665                 ELOG("No matching client found.\n");
 666                 return;
 667         }
 668
 669         free(classtitle);
 670         set_focus(conn, client, true);
 671 }
 672
 673 /*
 674  * Jump directly to the specified workspace, row and col.
 675  * Great for reaching windows that you always keep in the same spot (hello irssi, I'm looking at you)
 676  *
 677  */
 678 static void jump_to_container(xcb_connection_t *conn, const char *arguments) {
 679         int ws, row, col;
 680         int result;
 681
 682         result = sscanf(arguments, "%d %d %d", &ws, &col, &row);
 683         LOG("Jump called with %d parameters (\"%s\")\n", result, arguments);
 684
 685         /* No match? Either no arguments were specified, or no numbers */
 686         if (result < 1) {
 687                 ELOG("At least one valid argument required\n");
 688                 return;
 689         }
 690
 691         /* Move to the target workspace */
 692         workspace_show(conn, ws);
 693
 694         if (result < 3)
 695                 return;
 696
 697         DLOG("Boundary-checking col %d, row %d... (max cols %d, max rows %d)\n", col, row, c_ws->cols, c_ws->rows);
 698
 699         /* Move to row/col */
 700         if (row >= c_ws->rows)
 701                 row = c_ws->rows - 1;
 702         if (col >= c_ws->cols)
 703                 col = c_ws->cols - 1;
 704
 705         DLOG("Jumping to col %d, row %d\n", col, row);
 706         if (c_ws->table[col][row]->currently_focused != NULL)
 707                 set_focus(conn, c_ws->table[col][row]->currently_focused, true);
 708 }
 709
 710 /*
 711  * Travels the focus stack by the given number of times (or once, if no argument
 712  * was specified). That is, selects the window you were in before you focused
 713  * the current window.
 714  *
 715  * The special values 'floating' (select the next floating window), 'tiling'
 716  * (select the next tiling window), 'ft' (if the current window is floating,
 717  * select the next tiling window and vice-versa) are also valid
 718  *
 719  */
 720 static void travel_focus_stack(xcb_connection_t *conn, const char *arguments) {
 721         /* Start count at -1 to always skip the first element */
 722         int times, count = -1;
 723         Client *current;
 724         bool floating_criteria;
 725
 726         /* Either it’s one of the special values… */
 727         if (strcasecmp(arguments, "floating") == 0) {
 728                 floating_criteria = true;
 729         } else if (strcasecmp(arguments, "tiling") == 0) {
 730                 floating_criteria = false;
 731         } else if (strcasecmp(arguments, "ft") == 0) {
 732                 Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 733                 if (last_focused == SLIST_END(&(c_ws->focus_stack))) {
 734                         ELOG("Cannot select the next floating/tiling client because there is no client at all\n");
 735                         return;
 736                 }
 737
 738                 floating_criteria = !client_is_floating(last_focused);
 739         } else {
 740                 /* …or a number was specified */
 741                 if (sscanf(arguments, "%u", &times) != 1) {
 742                         ELOG("No or invalid argument given (\"%s\"), using default of 1 times\n", arguments);
 743                         times = 1;
 744                 }
 745
 746                 SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients) {
 747                         if (++count < times) {
 748                                 DLOG("Skipping\n");
 749                                 continue;
 750                         }
 751
 752                         DLOG("Focussing\n");
 753                         set_focus(conn, current, true);
 754                         break;
 755                 }
 756                 return;
 757         }
 758
 759         /* Select the next client matching the criteria parsed above */
 760         SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients)
 761                 if (client_is_floating(current) == floating_criteria) {
 762                         set_focus(conn, current, true);
 763                         break;
 764                 }
 765 }
 766
 767 /*
 768  * Switch to next or previous existing workspace
 769  *
 770  */
 771 static void next_previous_workspace(xcb_connection_t *conn, int direction) {
 772         Workspace *ws = c_ws;
 773
 774         if (direction == 'n') {
 775                 while (1) {
 776                         ws = TAILQ_NEXT(ws, workspaces);
 777
 778                         if (ws == TAILQ_END(workspaces))
 779                                 ws = TAILQ_FIRST(workspaces);
 780
 781                         if (ws == c_ws)
 782                                 return;
 783
 784                         if (ws->output == NULL)
 785                                 continue;
 786
 787                         workspace_show(conn, ws->num + 1);
 788                         return;
 789                 }
 790         } else if (direction == 'p') {
 791                 while (1) {
 792                         ws = TAILQ_PREV(ws, workspaces_head, workspaces);
 793
 794                         if (ws == TAILQ_END(workspaces))
 795                                 ws = TAILQ_LAST(workspaces, workspaces_head);
 796
 797                         if (ws == c_ws)
 798                                 return;
 799
 800                         if (ws->output == NULL)
 801                                 continue;
 802
 803                         workspace_show(conn, ws->num + 1);
 804                         return;
 805                 }
 806         }
 807 }
 808
 809 static void parse_resize_command(xcb_connection_t *conn, Client *last_focused, const char *command) {
 810         int first, second;
 811         resize_orientation_t orientation = O_VERTICAL;
 812         Container *con = last_focused->container;
 813         Workspace *ws = last_focused->workspace;
 814
 815         if (client_is_floating(last_focused)) {
 816                 DLOG("Resizing a floating client\n");
 817                 if (STARTS_WITH(command, "left")) {
 818                         command += strlen("left");
 819                         last_focused->rect.width += atoi(command);
 820                         last_focused->rect.x -= atoi(command);
 821                 } else if (STARTS_WITH(command, "right")) {
 822                         command += strlen("right");
 823                         last_focused->rect.width += atoi(command);
 824                 } else if (STARTS_WITH(command, "top")) {
 825                         command += strlen("top");
 826                         last_focused->rect.height += atoi(command);
 827                         last_focused->rect.y -= atoi(command);
 828                 } else if (STARTS_WITH(command, "bottom")) {
 829                         command += strlen("bottom");
 830                         last_focused->rect.height += atoi(command);
 831                 } else {
 832                         ELOG("Syntax: resize <left|right|top|bottom> [+|-]<pixels>\n");
 833                         return;
 834                 }
 835
 836                 /* resize_client flushes */
 837                 resize_client(conn, last_focused);
 838
 839                 return;
 840         }
 841
 842         if (STARTS_WITH(command, "left")) {
 843                 if (con->col == 0)
 844                         return;
 845                 first = con->col - 1;
 846                 second = con->col;
 847                 command += strlen("left");
 848         } else if (STARTS_WITH(command, "right")) {
 849                 first = con->col + (con->colspan - 1);
 850                 DLOG("column %d\n", first);
 851
 852                 if (!cell_exists(ws, first, con->row) ||
 853                     (first == (ws->cols-1)))
 854                         return;
 855
 856                 second = first + 1;
 857                 command += strlen("right");
 858         } else if (STARTS_WITH(command, "top")) {
 859                 if (con->row == 0)
 860                         return;
 861                 first = con->row - 1;
 862                 second = con->row;
 863                 orientation = O_HORIZONTAL;
 864                 command += strlen("top");
 865         } else if (STARTS_WITH(command, "bottom")) {
 866                 first = con->row + (con->rowspan - 1);
 867                 if (!cell_exists(ws, con->col, first) ||
 868                     (first == (ws->rows-1)))
 869                         return;
 870
 871                 second = first + 1;
 872                 orientation = O_HORIZONTAL;
 873                 command += strlen("bottom");
 874         } else {
 875                 ELOG("Syntax: resize <left|right|top|bottom> [+|-]<pixels>\n");
 876                 return;
 877         }
 878
 879         int pixels = atoi(command);
 880         if (pixels == 0)
 881                 return;
 882
 883         resize_container(conn, ws, first, second, orientation, pixels);
 884 }
 885
 886 /*
 887  * Parses a command, see file CMDMODE for more information
 888  *
 889  */
 890 void parse_command(xcb_connection_t *conn, const char *command) {
 891         LOG("--- parsing command \"%s\" ---\n", command);
 892         /* Get the first client from focus stack because floating clients are not
 893          * in any container, therefore CUR_CELL is not appropriate. */
 894         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 895         if (last_focused == SLIST_END(&(c_ws->focus_stack)))
 896                 last_focused = NULL;
 897
 898         /* Hmm, just to be sure */
 899         if (command[0] == '\0')
 900                 return;
 901
 902         /* Is it an <exec>? Then execute the given command. */
 903         if (STARTS_WITH(command, "exec ")) {
 904                 LOG("starting \"%s\"\n", command + strlen("exec "));
 905                 start_application(command+strlen("exec "));
 906                 return;
 907         }
 908
 909         if (STARTS_WITH(command, "mark")) {
 910                 if (last_focused == NULL) {
 911                         ELOG("There is no window to mark\n");
 912                         return;
 913                 }
 914                 const char *rest = command + strlen("mark");
 915                 while (*rest == ' ')
 916                         rest++;
 917                 if (*rest == '\0') {
 918                         DLOG("interactive mark starting\n");
 919                         start_application("i3-input -p 'mark ' -l 1 -P 'Mark: '");
 920                 } else {
 921                         LOG("mark with \"%s\"\n", rest);
 922                         client_mark(conn, last_focused, rest);
 923                 }
 924                 return;
 925         }
 926
 927         if (STARTS_WITH(command, "goto")) {
 928                 const char *rest = command + strlen("goto");
 929                 while (*rest == ' ')
 930                         rest++;
 931                 if (*rest == '\0') {
 932                         DLOG("interactive go to mark starting\n");
 933                         start_application("i3-input -p 'goto ' -l 1 -P 'Goto: '");
 934                 } else {
 935                         LOG("go to \"%s\"\n", rest);
 936                         jump_to_mark(conn, rest);
 937                 }
 938                 return;
 939         }
 940
 941         if (STARTS_WITH(command, "stack-limit ")) {
 942                 if (last_focused == NULL || client_is_floating(last_focused)) {
 943                         ELOG("No container focused\n");
 944                         return;
 945                 }
 946                 const char *rest = command + strlen("stack-limit ");
 947                 if (strncmp(rest, "rows ", strlen("rows ")) == 0) {
 948                         last_focused->container->stack_limit = STACK_LIMIT_ROWS;
 949                         rest += strlen("rows ");
 950                 } else if (strncmp(rest, "cols ", strlen("cols ")) == 0) {
 951                         last_focused->container->stack_limit = STACK_LIMIT_COLS;
 952                         rest += strlen("cols ");
 953                 } else {
 954                         ELOG("Syntax: stack-limit <cols|rows> <limit>\n");
 955                         return;
 956                 }
 957
 958                 last_focused->container->stack_limit_value = atoi(rest);
 959                 if (last_focused->container->stack_limit_value == 0)
 960                         last_focused->container->stack_limit = STACK_LIMIT_NONE;
 961
 962                 return;
 963         }
 964
 965         if (STARTS_WITH(command, "resize ")) {
 966                 if (last_focused == NULL)
 967                         return;
 968                 const char *rest = command + strlen("resize ");
 969                 parse_resize_command(conn, last_focused, rest);
 970                 return;
 971         }
 972
 973         if (STARTS_WITH(command, "mode ")) {
 974                 const char *rest = command + strlen("mode ");
 975                 switch_mode(conn, rest);
 976                 return;
 977         }
 978
 979         /* Is it an <exit>? */
 980         if (STARTS_WITH(command, "exit")) {
 981                 LOG("User issued exit-command, exiting without error.\n");
 982                 restore_geometry(global_conn);
 983                 exit(EXIT_SUCCESS);
 984         }
 985
 986         /* Is it a <reload>? */
 987         if (STARTS_WITH(command, "reload")) {
 988                 load_configuration(conn, NULL, true);
 989                 return;
 990         }
 991
 992         /* Is it <restart>? Then restart in place. */
 993         if (STARTS_WITH(command, "restart")) {
 994                 i3_restart();
 995         }
 996
 997         if (STARTS_WITH(command, "kill")) {
 998                 if (last_focused == NULL) {
 999                         ELOG("There is no window to kill\n");
1000                         return;
1001                 }
1002
1003                 LOG("Killing current window\n");
1004                 client_kill(conn, last_focused);
1005                 return;
1006         }
1007
1008         /* Is it a jump to a specified workspace, row, col? */
1009         if (STARTS_WITH(command, "jump ")) {
1010                 const char *arguments = command + strlen("jump ");
1011                 if (arguments[0] == '"')
1012                         jump_to_window(conn, arguments);
1013                 else jump_to_container(conn, arguments);
1014                 return;
1015         }
1016
1017         /* Should we travel the focus stack? */
1018         if (STARTS_WITH(command, "focus")) {
1019                 const char *arguments = command + strlen("focus ");
1020                 travel_focus_stack(conn, arguments);
1021                 return;
1022         }
1023
1024         /* Is it 'f' for fullscreen, or 'fg' for fullscreen_global? */
1025         if (command[0] == 'f') {
1026                 if (last_focused == NULL)
1027                         return;
1028                 if (command[1] == 'g')
1029                         client_toggle_fullscreen_global(conn, last_focused);
1030                 else
1031                         client_toggle_fullscreen(conn, last_focused);
1032                 return;
1033         }
1034
1035         /* Is it just 's' for stacking or 'd' for default? */
1036         if ((command[0] == 's' || command[0] == 'd' || command[0] == 'T') && (command[1] == '\0')) {
1037                 if (last_focused != NULL && client_is_floating(last_focused)) {
1038                         ELOG("not switching, this is a floating client\n");
1039                         return;
1040                 }
1041                 LOG("Switching mode for current container\n");
1042                 int new_mode = MODE_DEFAULT;
1043                 if (command[0] == 's' && CUR_CELL->mode != MODE_STACK)
1044                         new_mode = MODE_STACK;
1045                 if (command[0] == 'T' && CUR_CELL->mode != MODE_TABBED)
1046                         new_mode = MODE_TABBED;
1047                 switch_layout_mode(conn, CUR_CELL, new_mode);
1048                 return;
1049         }
1050
1051         /* Is it 'bn' (border normal), 'bp' (border 1pixel) or 'bb' (border borderless)? */
1052         /* or even 'bt' (toggle border: 'bp' -> 'bb' -> 'bn' ) */
1053         if (command[0] == 'b') {
1054                 if (last_focused == NULL) {
1055                         ELOG("No window focused, cannot change border type\n");
1056                         return;
1057                 }
1058
1059                 char com = command[1];
1060                 if (command[1] == 't') {
1061                         if (last_focused->titlebar_position == TITLEBAR_TOP &&
1062                             !last_focused->borderless)
1063                             com = 'p';
1064                         else if (last_focused->titlebar_position == TITLEBAR_OFF &&
1065                                  !last_focused->borderless)
1066                             com = 'b';
1067                         else com = 'n';
1068                 }
1069
1070                 client_change_border(conn, last_focused, com);
1071                 return;
1072         }
1073
1074         if (command[0] == 'H') {
1075                 LOG("Hiding all floating windows\n");
1076                 floating_toggle_hide(conn, c_ws);
1077                 return;
1078         }
1079
1080         enum { WITH_WINDOW, WITH_CONTAINER, WITH_WORKSPACE, WITH_SCREEN } with = WITH_WINDOW;
1081
1082         /* Is it a <with>? */
1083         if (command[0] == 'w') {
1084                 command++;
1085                 /* TODO: implement */
1086                 if (command[0] == 'c') {
1087                         with = WITH_CONTAINER;
1088                         command++;
1089                 } else if (command[0] == 'w') {
1090                         with = WITH_WORKSPACE;
1091                         command++;
1092                 } else if (command[0] == 's') {
1093                         with = WITH_SCREEN;
1094                         command++;
1095                 } else {
1096                         ELOG("not yet implemented.\n");
1097                         return;
1098                 }
1099         }
1100
1101         /* Is it 't' for toggle tiling/floating? */
1102         if (command[0] == 't') {
1103                 if (with == WITH_WORKSPACE) {
1104                         c_ws->auto_float = !c_ws->auto_float;
1105                         LOG("autofloat is now %d\n", c_ws->auto_float);
1106                         return;
1107                 }
1108                 if (last_focused == NULL) {
1109                         ELOG("Cannot toggle tiling/floating: workspace empty\n");
1110                         return;
1111                 }
1112
1113                 Workspace *ws = last_focused->workspace;
1114
1115                 toggle_floating_mode(conn, last_focused, false);
1116                 /* delete all empty columns/rows */
1117                 cleanup_table(conn, ws);
1118
1119                 /* Fix colspan/rowspan if it’d overlap */
1120                 fix_colrowspan(conn, ws);
1121
1122                 render_workspace(conn, ws->output, ws);
1123
1124                 /* Re-focus the client because cleanup_table sets the focus to the last
1125                  * focused client inside a container only. */
1126                 set_focus(conn, last_focused, true);
1127
1128                 return;
1129         }
1130
1131         /* Is it 'n' or 'p' for next/previous workspace? (nw) */
1132         if ((command[0] == 'n' || command[0] == 'p') && command[1] == 'w') {
1133                next_previous_workspace(conn, command[0]);
1134                return;
1135         }
1136
1137         /* It’s a normal <cmd> */
1138         char *rest = NULL;
1139         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
1140         direction_t direction;
1141         int times = strtol(command, &rest, 10);
1142         if (rest == NULL) {
1143                 ELOG("Invalid command (\"%s\")\n", command);
1144                 return;
1145         }
1146
1147         if (*rest == '\0') {
1148                 /* No rest? This was a workspace number, not a times specification */
1149                 workspace_show(conn, times);
1150                 return;
1151         }
1152
1153         if (*rest == 'm' || *rest == 's') {
1154                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
1155                 rest++;
1156         }
1157
1158         int workspace = strtol(rest, &rest, 10);
1159
1160         if (rest == NULL) {
1161                 ELOG("Invalid command (\"%s\")\n", command);
1162                 return;
1163         }
1164
1165         if (*rest == '\0') {
1166                 if (last_focused != NULL && client_is_floating(last_focused))
1167                         move_floating_window_to_workspace(conn, last_focused, workspace);
1168                 else move_current_window_to_workspace(conn, workspace);
1169                 return;
1170         }
1171
1172         if (last_focused == NULL) {
1173                 ELOG("Not performing (no window found)\n");
1174                 return;
1175         }
1176
1177         if (client_is_floating(last_focused) &&
1178             (action != ACTION_FOCUS && action != ACTION_MOVE)) {
1179                 ELOG("Not performing (floating)\n");
1180                 return;
1181         }
1182
1183         /* Now perform action to <where> */
1184         while (*rest != '\0') {
1185                 if (*rest == 'h')
1186                         direction = D_LEFT;
1187                 else if (*rest == 'j')
1188                         direction = D_DOWN;
1189                 else if (*rest == 'k')
1190                         direction = D_UP;
1191                 else if (*rest == 'l')
1192                         direction = D_RIGHT;
1193                 else {
1194                         ELOG("unknown direction: %c\n", *rest);
1195                         return;
1196                 }
1197                 rest++;
1198
1199                 if (action == ACTION_FOCUS) {
1200                         if (with == WITH_SCREEN) {
1201                                 focus_thing(conn, direction, THING_SCREEN);
1202                                 continue;
1203                         }
1204                         if (client_is_floating(last_focused)) {
1205                                 floating_focus_direction(conn, last_focused, direction);
1206                                 continue;
1207                         }
1208                         focus_thing(conn, direction, (with == WITH_WINDOW ? THING_WINDOW : THING_CONTAINER));
1209                         continue;
1210                 }
1211
1212                 if (action == ACTION_MOVE) {
1213                         if (with == WITH_SCREEN) {
1214                                 /* TODO: this should swap the screen’s contents
1215                                  * (e.g. all workspaces) with the next/previous/…
1216                                  * screen */
1217                                 ELOG("Not yet implemented\n");
1218                                 continue;
1219                         }
1220                         if (client_is_floating(last_focused)) {
1221                                 floating_move(conn, last_focused, direction);
1222                                 continue;
1223                         }
1224                         if (with == WITH_WINDOW)
1225                                 move_current_window(conn, direction);
1226                         else move_current_container(conn, direction);
1227                         continue;
1228                 }
1229
1230                 if (action == ACTION_SNAP) {
1231                         if (with == WITH_SCREEN) {
1232                                 ELOG("You cannot snap a screen (it makes no sense).\n");
1233                                 continue;
1234                         }
1235                         snap_current_container(conn, direction);
1236                         continue;
1237                 }
1238         }
1239 }