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 #include "workspace.h"
  31 #include "commands.h"
  32 #include "resize.h"
  33
  34 bool focus_window_in_container(xcb_connection_t *conn, Container *container, direction_t direction) {
  35         /* If this container is empty, we’re done */
  36         if (container->currently_focused == NULL)
  37                 return false;
  38
  39         /* Get the previous/next client or wrap around */
  40         Client *candidate = NULL;
  41         if (direction == D_UP) {
  42                 if ((candidate = CIRCLEQ_PREV_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  43                         candidate = CIRCLEQ_LAST(&(container->clients));
  44         }
  45         else if (direction == D_DOWN) {
  46                 if ((candidate = CIRCLEQ_NEXT_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  47                         candidate = CIRCLEQ_FIRST(&(container->clients));
  48         } else LOG("Direction not implemented!\n");
  49
  50         /* If we could not switch, the container contains exactly one client. We return false */
  51         if (candidate == container->currently_focused)
  52                 return false;
  53
  54         /* Set focus */
  55         set_focus(conn, candidate, true);
  56
  57         return true;
  58 }
  59
  60 typedef enum { THING_WINDOW, THING_CONTAINER, THING_SCREEN } thing_t;
  61
  62 static void jump_to_mark(xcb_connection_t *conn, const char *mark) {
  63         Client *current;
  64         LOG("Jumping to \"%s\"\n", mark);
  65
  66         Workspace *ws;
  67         TAILQ_FOREACH(ws, workspaces, workspaces)
  68                 SLIST_FOREACH(current, &(ws->focus_stack), focus_clients) {
  69                         if (current->mark == NULL || strcmp(current->mark, mark) != 0)
  70                                 continue;
  71
  72                         workspace_show(conn, current->workspace->num + 1);
  73                         set_focus(conn, current, true);
  74                         return;
  75                 }
  76
  77         LOG("No window with this mark found\n");
  78 }
  79
  80 static void focus_thing(xcb_connection_t *conn, direction_t direction, thing_t thing) {
  81         LOG("focusing direction %d\n", direction);
  82
  83         int new_row = current_row,
  84             new_col = current_col;
  85         Container *container = CUR_CELL;
  86         Workspace *t_ws = c_ws;
  87
  88         /* Makes sure new_col and new_row are within bounds of the new workspace */
  89         void check_colrow_boundaries() {
  90                 if (new_col >= t_ws->cols)
  91                         new_col = (t_ws->cols - 1);
  92                 if (new_row >= t_ws->rows)
  93                         new_row = (t_ws->rows - 1);
  94         }
  95
  96         /* There always is a container. If not, current_col or current_row is wrong */
  97         assert(container != NULL);
  98
  99         if (container->workspace->fullscreen_client != NULL) {
 100                 LOG("You're in fullscreen mode. Won't switch focus\n");
 101                 return;
 102         }
 103
 104         /* For focusing screens, situation is different: we get the rect
 105          * of the current screen, then get the screen which is on its
 106          * right/left/bottom/top and just switch to the workspace on
 107          * the target screen. */
 108         if (thing == THING_SCREEN) {
 109                 i3Screen *cs = c_ws->screen;
 110                 assert(cs != NULL);
 111                 Rect bounds = cs->rect;
 112
 113                 if (direction == D_RIGHT)
 114                         bounds.x += bounds.width;
 115                 else if (direction == D_LEFT)
 116                         bounds.x -= bounds.width;
 117                 else if (direction == D_UP)
 118                         bounds.y -= bounds.height;
 119                 else bounds.y += bounds.height;
 120
 121                 i3Screen *target = get_screen_containing(bounds.x, bounds.y);
 122                 if (target == NULL) {
 123                         LOG("Target screen NULL\n");
 124                         /* Wrap around if the target screen is out of bounds */
 125                         if (direction == D_RIGHT)
 126                                 target = get_screen_most(D_LEFT, cs);
 127                         else if (direction == D_LEFT)
 128                                 target = get_screen_most(D_RIGHT, cs);
 129                         else if (direction == D_UP)
 130                                 target = get_screen_most(D_DOWN, cs);
 131                         else target = get_screen_most(D_UP, cs);
 132                 }
 133
 134                 LOG("Switching to ws %d\n", target->current_workspace + 1);
 135                 workspace_show(conn, target->current_workspace->num + 1);
 136                 return;
 137         }
 138
 139         /* TODO: for horizontal default layout, this has to be expanded to LEFT/RIGHT */
 140         if (direction == D_UP || direction == D_DOWN) {
 141                 if (thing == THING_WINDOW)
 142                         /* Let’s see if we can perform up/down focus in the current container */
 143                         if (focus_window_in_container(conn, container, direction))
 144                                 return;
 145
 146                 if (direction == D_DOWN && cell_exists(current_col, current_row+1))
 147                         new_row = current_row + t_ws->table[current_col][current_row]->rowspan;
 148                 else if (direction == D_UP && cell_exists(current_col, current_row-1)) {
 149                         /* Set new_row as a sane default, but it may get overwritten in a second */
 150                         new_row--;
 151
 152                         /* Search from the top to correctly handle rowspanned containers */
 153                         for (int rows = 0; rows < current_row; rows += t_ws->table[current_col][rows]->rowspan) {
 154                                 if (new_row > (rows + (t_ws->table[current_col][rows]->rowspan - 1)))
 155                                         continue;
 156
 157                                 new_row = rows;
 158                                 break;
 159                         }
 160                 } else {
 161                         /* Let’s see if there is a screen down/up there to which we can switch */
 162                         LOG("container is at %d with height %d\n", container->y, container->height);
 163                         i3Screen *screen;
 164                         int destination_y = (direction == D_UP ? (container->y - 1) : (container->y + container->height + 1));
 165                         if ((screen = get_screen_containing(container->x, destination_y)) == NULL) {
 166                                 LOG("Wrapping screen around vertically\n");
 167                                 /* No screen found? Then wrap */
 168                                 screen = get_screen_most((direction == D_UP ? D_DOWN : D_UP), container->workspace->screen);
 169                         }
 170                         t_ws = screen->current_workspace;
 171                         new_row = (direction == D_UP ? (t_ws->rows - 1) : 0);
 172                 }
 173
 174                 check_colrow_boundaries();
 175
 176                 LOG("new_col = %d, new_row = %d\n", new_col, new_row);
 177                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
 178                         LOG("Cell empty, checking for colspanned client above...\n");
 179                         for (int cols = 0; cols < new_col; cols += t_ws->table[cols][new_row]->colspan) {
 180                                 if (new_col > (cols + (t_ws->table[cols][new_row]->colspan - 1)))
 181                                         continue;
 182
 183                                 new_col = cols;
 184                                 break;
 185                         }
 186                         LOG("Fixed it to new col %d\n", new_col);
 187                 }
 188         } else if (direction == D_LEFT || direction == D_RIGHT) {
 189                 if (direction == D_RIGHT && cell_exists(current_col+1, current_row))
 190                         new_col = current_col + t_ws->table[current_col][current_row]->colspan;
 191                 else if (direction == D_LEFT && cell_exists(current_col-1, current_row)) {
 192                         /* Set new_col as a sane default, but it may get overwritten in a second */
 193                         new_col--;
 194
 195                         /* Search from the left to correctly handle colspanned containers */
 196                         for (int cols = 0; cols < current_col; cols += t_ws->table[cols][current_row]->colspan) {
 197                                 if (new_col > (cols + (t_ws->table[cols][current_row]->colspan - 1)))
 198                                         continue;
 199
 200                                 new_col = cols;
 201                                 break;
 202                         }
 203                 } else {
 204                         /* Let’s see if there is a screen left/right here to which we can switch */
 205                         LOG("container is at %d with width %d\n", container->x, container->width);
 206                         i3Screen *screen;
 207                         int destination_x = (direction == D_LEFT ? (container->x - 1) : (container->x + container->width + 1));
 208                         if ((screen = get_screen_containing(destination_x, container->y)) == NULL) {
 209                                 LOG("Wrapping screen around horizontally\n");
 210                                 screen = get_screen_most((direction == D_LEFT ? D_RIGHT : D_LEFT), container->workspace->screen);
 211                         }
 212                         t_ws = screen->current_workspace;
 213                         new_col = (direction == D_LEFT ? (t_ws->cols - 1) : 0);
 214                 }
 215
 216                 check_colrow_boundaries();
 217
 218                 LOG("new_col = %d, new_row = %d\n", new_col, new_row);
 219                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
 220                         LOG("Cell empty, checking for rowspanned client above...\n");
 221                         for (int rows = 0; rows < new_row; rows += t_ws->table[new_col][rows]->rowspan) {
 222                                 if (new_row > (rows + (t_ws->table[new_col][rows]->rowspan - 1)))
 223                                         continue;
 224
 225                                 new_row = rows;
 226                                 break;
 227                         }
 228                         LOG("Fixed it to new row %d\n", new_row);
 229                 }
 230         } else {
 231                 LOG("direction unhandled\n");
 232                 return;
 233         }
 234
 235         check_colrow_boundaries();
 236
 237         if (t_ws->table[new_col][new_row]->currently_focused != NULL)
 238                 set_focus(conn, t_ws->table[new_col][new_row]->currently_focused, true);
 239 }
 240
 241 /*
 242  * Tries to move the window inside its current container.
 243  *
 244  * Returns true if the window could be moved, false otherwise.
 245  *
 246  */
 247 static bool move_current_window_in_container(xcb_connection_t *conn, Client *client,
 248                 direction_t direction) {
 249         assert(client->container != NULL);
 250
 251         Client *other = (direction == D_UP ? CIRCLEQ_PREV(client, clients) :
 252                                              CIRCLEQ_NEXT(client, clients));
 253
 254         if (other == CIRCLEQ_END(&(client->container->clients)))
 255                 return false;
 256
 257         LOG("i can do that\n");
 258         /* We can move the client inside its current container */
 259         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 260         if (direction == D_UP)
 261                 CIRCLEQ_INSERT_BEFORE(&(client->container->clients), other, client, clients);
 262         else CIRCLEQ_INSERT_AFTER(&(client->container->clients), other, client, clients);
 263         render_layout(conn);
 264         return true;
 265 }
 266
 267 /*
 268  * Moves the current window or whole container to the given direction, creating a column/row if
 269  * necessary.
 270  *
 271  */
 272 static void move_current_window(xcb_connection_t *conn, direction_t direction) {
 273         LOG("moving window to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 274                                             (direction == D_LEFT ? "left" : "right"))));
 275         /* Get current window */
 276         Container *container = CUR_CELL,
 277                   *new = NULL;
 278
 279         /* There has to be a container, see focus_window() */
 280         assert(container != NULL);
 281
 282         /* If there is no window or the dock window is focused, we’re done */
 283         if (container->currently_focused == NULL ||
 284             container->currently_focused->dock)
 285                 return;
 286
 287         /* As soon as the client is moved away, the last focused client in the old
 288          * container needs to get focus, if any. Therefore, we save it here. */
 289         Client *current_client = container->currently_focused;
 290         Client *to_focus = get_last_focused_client(conn, container, current_client);
 291
 292         if (to_focus == NULL) {
 293                 to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 294                 if (to_focus == NULL)
 295                         to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 296         }
 297
 298         switch (direction) {
 299                 case D_LEFT:
 300                         /* If we’re at the left-most position, move the rest of the table right */
 301                         if (current_col == 0) {
 302                                 expand_table_cols_at_head(c_ws);
 303                                 new = CUR_CELL;
 304                         } else
 305                                 new = CUR_TABLE[--current_col][current_row];
 306                         break;
 307                 case D_RIGHT:
 308                         if (current_col == (c_ws->cols-1))
 309                                 expand_table_cols(c_ws);
 310
 311                         new = CUR_TABLE[++current_col][current_row];
 312                         break;
 313                 case D_UP:
 314                         if (move_current_window_in_container(conn, current_client, D_UP))
 315                                 return;
 316
 317                         /* if we’re at the up-most position, move the rest of the table down */
 318                         if (current_row == 0) {
 319                                 expand_table_rows_at_head(c_ws);
 320                                 new = CUR_CELL;
 321                         } else
 322                                 new = CUR_TABLE[current_col][--current_row];
 323                         break;
 324                 case D_DOWN:
 325                         if (move_current_window_in_container(conn, current_client, D_DOWN))
 326                                 return;
 327
 328                         if (current_row == (c_ws->rows-1))
 329                                 expand_table_rows(c_ws);
 330
 331                         new = CUR_TABLE[current_col][++current_row];
 332                         break;
 333                 /* To make static analyzers happy: */
 334                 default:
 335                         return;
 336         }
 337
 338         /* Remove it from the old container and put it into the new one */
 339         client_remove_from_container(conn, current_client, container, true);
 340
 341         if (new->currently_focused != NULL)
 342                 CIRCLEQ_INSERT_AFTER(&(new->clients), new->currently_focused, current_client, clients);
 343         else CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
 344         SLIST_INSERT_HEAD(&(new->workspace->focus_stack), current_client, focus_clients);
 345
 346         /* Update data structures */
 347         current_client->container = new;
 348         current_client->workspace = new->workspace;
 349         container->currently_focused = to_focus;
 350         new->currently_focused = current_client;
 351
 352         Workspace *workspace = container->workspace;
 353
 354         /* delete all empty columns/rows */
 355         cleanup_table(conn, workspace);
 356
 357         /* Fix colspan/rowspan if it’d overlap */
 358         fix_colrowspan(conn, workspace);
 359
 360         render_workspace(conn, workspace->screen, workspace);
 361         xcb_flush(conn);
 362
 363         set_focus(conn, current_client, true);
 364 }
 365
 366 static void move_current_container(xcb_connection_t *conn, direction_t direction) {
 367         LOG("moving container to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 368                                             (direction == D_LEFT ? "left" : "right"))));
 369         /* Get current window */
 370         Container *container = CUR_CELL,
 371                   *new = NULL;
 372
 373         Container **old = &CUR_CELL;
 374
 375         /* There has to be a container, see focus_window() */
 376         assert(container != NULL);
 377
 378         switch (direction) {
 379                 case D_LEFT:
 380                         /* If we’re at the left-most position, move the rest of the table right */
 381                         if (current_col == 0) {
 382                                 expand_table_cols_at_head(c_ws);
 383                                 new = CUR_CELL;
 384                                 old = &CUR_TABLE[current_col+1][current_row];
 385                         } else
 386                                 new = CUR_TABLE[--current_col][current_row];
 387                         break;
 388                 case D_RIGHT:
 389                         if (current_col == (c_ws->cols-1))
 390                                 expand_table_cols(c_ws);
 391
 392                         new = CUR_TABLE[++current_col][current_row];
 393                         break;
 394                 case D_UP:
 395                         /* if we’re at the up-most position, move the rest of the table down */
 396                         if (current_row == 0) {
 397                                 expand_table_rows_at_head(c_ws);
 398                                 new = CUR_CELL;
 399                                 old = &CUR_TABLE[current_col][current_row+1];
 400                         } else
 401                                 new = CUR_TABLE[current_col][--current_row];
 402                         break;
 403                 case D_DOWN:
 404                         if (current_row == (c_ws->rows-1))
 405                                 expand_table_rows(c_ws);
 406
 407                         new = CUR_TABLE[current_col][++current_row];
 408                         break;
 409                 /* To make static analyzers happy: */
 410                 default:
 411                         return;
 412         }
 413
 414         LOG("old = %d,%d and new = %d,%d\n", container->col, container->row, new->col, new->row);
 415
 416         /* Swap the containers */
 417         int col = new->col;
 418         int row = new->row;
 419
 420         *old = new;
 421         new->col = container->col;
 422         new->row = container->row;
 423
 424         CUR_CELL = container;
 425         container->col = col;
 426         container->row = row;
 427
 428         Workspace *workspace = container->workspace;
 429
 430         /* delete all empty columns/rows */
 431         cleanup_table(conn, workspace);
 432
 433         /* Fix colspan/rowspan if it’d overlap */
 434         fix_colrowspan(conn, workspace);
 435
 436         render_layout(conn);
 437 }
 438
 439 /*
 440  * "Snaps" the current container (not possible for windows, because it works at table base)
 441  * to the given direction, that is, adjusts cellspan/rowspan
 442  *
 443  */
 444 static void snap_current_container(xcb_connection_t *conn, direction_t direction) {
 445         LOG("snapping container to direction %d\n", direction);
 446
 447         Container *container = CUR_CELL;
 448
 449         assert(container != NULL);
 450
 451         switch (direction) {
 452                 case D_LEFT:
 453                         /* Snap to the left is actually a move to the left and then a snap right */
 454                         if (!cell_exists(container->col - 1, container->row) ||
 455                             CUR_TABLE[container->col-1][container->row]->currently_focused != NULL) {
 456                                 LOG("cannot snap to left - the cell is already used\n");
 457                                 return;
 458                         }
 459
 460                         move_current_window(conn, D_LEFT);
 461                         snap_current_container(conn, D_RIGHT);
 462                         return;
 463                 case D_RIGHT: {
 464                         /* Check if the cell is used */
 465                         int new_col = container->col + container->colspan;
 466                         for (int i = 0; i < container->rowspan; i++)
 467                                 if (!cell_exists(new_col, container->row + i) ||
 468                                     CUR_TABLE[new_col][container->row + i]->currently_focused != NULL) {
 469                                         LOG("cannot snap to right - the cell is already used\n");
 470                                         return;
 471                                 }
 472
 473                         /* Check if there are other cells with rowspan, which are in our way.
 474                          * If so, reduce their rowspan. */
 475                         for (int i = container->row-1; i >= 0; i--) {
 476                                 LOG("we got cell %d, %d with rowspan %d\n",
 477                                                 new_col, i, CUR_TABLE[new_col][i]->rowspan);
 478                                 while ((CUR_TABLE[new_col][i]->rowspan-1) >= (container->row - i))
 479                                         CUR_TABLE[new_col][i]->rowspan--;
 480                                 LOG("new rowspan = %d\n", CUR_TABLE[new_col][i]->rowspan);
 481                         }
 482
 483                         container->colspan++;
 484                         break;
 485                 }
 486                 case D_UP:
 487                         if (!cell_exists(container->col, container->row - 1) ||
 488                             CUR_TABLE[container->col][container->row-1]->currently_focused != NULL) {
 489                                 LOG("cannot snap to top - the cell is already used\n");
 490                                 return;
 491                         }
 492
 493                         move_current_window(conn, D_UP);
 494                         snap_current_container(conn, D_DOWN);
 495                         return;
 496                 case D_DOWN: {
 497                         LOG("snapping down\n");
 498                         int new_row = container->row + container->rowspan;
 499                         for (int i = 0; i < container->colspan; i++)
 500                                 if (!cell_exists(container->col + i, new_row) ||
 501                                     CUR_TABLE[container->col + i][new_row]->currently_focused != NULL) {
 502                                         LOG("cannot snap down - the cell is already used\n");
 503                                         return;
 504                                 }
 505
 506                         for (int i = container->col-1; i >= 0; i--) {
 507                                 LOG("we got cell %d, %d with colspan %d\n",
 508                                                 i, new_row, CUR_TABLE[i][new_row]->colspan);
 509                                 while ((CUR_TABLE[i][new_row]->colspan-1) >= (container->col - i))
 510                                         CUR_TABLE[i][new_row]->colspan--;
 511                                 LOG("new colspan = %d\n", CUR_TABLE[i][new_row]->colspan);
 512
 513                         }
 514
 515                         container->rowspan++;
 516                         break;
 517                 }
 518                 /* To make static analyzers happy: */
 519                 default:
 520                         return;
 521         }
 522
 523         render_layout(conn);
 524 }
 525
 526 static void move_floating_window_to_workspace(xcb_connection_t *conn, Client *client, int workspace) {
 527         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 528         Workspace *t_ws = workspace_get(workspace-1),
 529                   *old_ws = client->workspace;
 530
 531         LOG("moving floating\n");
 532
 533         workspace_initialize(t_ws, c_ws->screen);
 534
 535         /* Check if there is already a fullscreen client on the destination workspace and
 536          * stop moving if so. */
 537         if (client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 538                 LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 539                 return;
 540         }
 541
 542         floating_assign_to_workspace(client, t_ws);
 543
 544         /* If we’re moving it to an invisible screen, we need to unmap it */
 545         if (!workspace_is_visible(t_ws)) {
 546                 LOG("This workspace is not visible, unmapping\n");
 547                 client_unmap(conn, client);
 548         } else {
 549                 /* If this is not the case, we move the window to a workspace
 550                  * which is on another screen, so we also need to adjust its
 551                  * coordinates. */
 552                 LOG("before x = %d, y = %d\n", client->rect.x, client->rect.y);
 553                 uint32_t relative_x = client->rect.x - old_ws->rect.x,
 554                          relative_y = client->rect.y - old_ws->rect.y;
 555                 LOG("rel_x = %d, rel_y = %d\n", relative_x, relative_y);
 556                 client->rect.x = t_ws->rect.x + relative_x;
 557                 client->rect.y = t_ws->rect.y + relative_y;
 558                 LOG("after x = %d, y = %d\n", client->rect.x, client->rect.y);
 559                 reposition_client(conn, client);
 560                 xcb_flush(conn);
 561         }
 562
 563         LOG("done\n");
 564
 565         render_layout(conn);
 566
 567         if (workspace_is_visible(t_ws))
 568                 set_focus(conn, client, true);
 569 }
 570
 571 /*
 572  * Moves the currently selected window to the given workspace
 573  *
 574  */
 575 static void move_current_window_to_workspace(xcb_connection_t *conn, int workspace) {
 576         LOG("Moving current window to workspace %d\n", workspace);
 577
 578         Container *container = CUR_CELL;
 579
 580         assert(container != NULL);
 581
 582         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 583         Workspace *t_ws = workspace_get(workspace-1);
 584
 585         Client *current_client = container->currently_focused;
 586         if (current_client == NULL) {
 587                 LOG("No currently focused client in current container.\n");
 588                 return;
 589         }
 590         Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 591         if (to_focus == NULL)
 592                 to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 593
 594         workspace_initialize(t_ws, container->workspace->screen);
 595         /* Check if there is already a fullscreen client on the destination workspace and
 596          * stop moving if so. */
 597         if (current_client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 598                 LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 599                 return;
 600         }
 601
 602         Container *to_container = t_ws->table[t_ws->current_col][t_ws->current_row];
 603
 604         assert(to_container != NULL);
 605
 606         client_remove_from_container(conn, current_client, container, true);
 607         if (container->workspace->fullscreen_client == current_client)
 608                 container->workspace->fullscreen_client = NULL;
 609
 610         /* TODO: insert it to the correct position */
 611         CIRCLEQ_INSERT_TAIL(&(to_container->clients), current_client, clients);
 612
 613         SLIST_INSERT_HEAD(&(to_container->workspace->focus_stack), current_client, focus_clients);
 614         LOG("Moved.\n");
 615
 616         current_client->container = to_container;
 617         current_client->workspace = to_container->workspace;
 618         container->currently_focused = to_focus;
 619         to_container->currently_focused = current_client;
 620
 621         /* If we’re moving it to an invisible screen, we need to unmap it */
 622         if (!workspace_is_visible(to_container->workspace)) {
 623                 LOG("This workspace is not visible, unmapping\n");
 624                 client_unmap(conn, current_client);
 625         } else {
 626                 if (current_client->fullscreen) {
 627                         LOG("Calling client_enter_fullscreen again\n");
 628                         client_enter_fullscreen(conn, current_client);
 629                 }
 630         }
 631
 632         /* delete all empty columns/rows */
 633         cleanup_table(conn, container->workspace);
 634
 635         render_layout(conn);
 636
 637         if (workspace_is_visible(to_container->workspace))
 638                 set_focus(conn, current_client, true);
 639 }
 640
 641 /*
 642  * Jumps to the given window class / title.
 643  * Title is matched using strstr, that is, matches if it appears anywhere
 644  * in the string. Regular expressions seem to be a bit overkill here. However,
 645  * if we need them for something else somewhen, we may introduce them here, too.
 646  *
 647  */
 648 static void jump_to_window(xcb_connection_t *conn, const char *arguments) {
 649         char *classtitle;
 650         Client *client;
 651
 652         /* The first character is a quote, this was checked before */
 653         classtitle = sstrdup(arguments+1);
 654         /* The last character is a quote, we just set it to NULL */
 655         classtitle[strlen(classtitle)-1] = '\0';
 656
 657         if ((client = get_matching_client(conn, classtitle, NULL)) == NULL) {
 658                 free(classtitle);
 659                 LOG("No matching client found.\n");
 660                 return;
 661         }
 662
 663         free(classtitle);
 664         set_focus(conn, client, true);
 665 }
 666
 667 /*
 668  * Jump directly to the specified workspace, row and col.
 669  * Great for reaching windows that you always keep in the same spot (hello irssi, I'm looking at you)
 670  *
 671  */
 672 static void jump_to_container(xcb_connection_t *conn, const char *arguments) {
 673         int ws, row, col;
 674         int result;
 675
 676         result = sscanf(arguments, "%d %d %d", &ws, &col, &row);
 677         LOG("Jump called with %d parameters (\"%s\")\n", result, arguments);
 678
 679         /* No match? Either no arguments were specified, or no numbers */
 680         if (result < 1) {
 681                 LOG("At least one valid argument required\n");
 682                 return;
 683         }
 684
 685         /* Move to the target workspace */
 686         workspace_show(conn, ws);
 687
 688         if (result < 3)
 689                 return;
 690
 691         LOG("Boundary-checking col %d, row %d... (max cols %d, max rows %d)\n", col, row, c_ws->cols, c_ws->rows);
 692
 693         /* Move to row/col */
 694         if (row >= c_ws->rows)
 695                 row = c_ws->rows - 1;
 696         if (col >= c_ws->cols)
 697                 col = c_ws->cols - 1;
 698
 699         LOG("Jumping to col %d, row %d\n", col, row);
 700         if (c_ws->table[col][row]->currently_focused != NULL)
 701                 set_focus(conn, c_ws->table[col][row]->currently_focused, true);
 702 }
 703
 704 /*
 705  * Travels the focus stack by the given number of times (or once, if no argument
 706  * was specified). That is, selects the window you were in before you focused
 707  * the current window.
 708  *
 709  * The special values 'floating' (select the next floating window), 'tiling'
 710  * (select the next tiling window), 'ft' (if the current window is floating,
 711  * select the next tiling window and vice-versa) are also valid
 712  *
 713  */
 714 static void travel_focus_stack(xcb_connection_t *conn, const char *arguments) {
 715         /* Start count at -1 to always skip the first element */
 716         int times, count = -1;
 717         Client *current;
 718         bool floating_criteria;
 719
 720         /* Either it’s one of the special values… */
 721         if (strcasecmp(arguments, "floating") == 0) {
 722                 floating_criteria = true;
 723         } else if (strcasecmp(arguments, "tiling") == 0) {
 724                 floating_criteria = false;
 725         } else if (strcasecmp(arguments, "ft") == 0) {
 726                 Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 727                 if (last_focused == SLIST_END(&(c_ws->focus_stack))) {
 728                         LOG("Cannot select the next floating/tiling client because there is no client at all\n");
 729                         return;
 730                 }
 731
 732                 floating_criteria = !client_is_floating(last_focused);
 733         } else {
 734                 /* …or a number was specified */
 735                 if (sscanf(arguments, "%u", &times) != 1) {
 736                         LOG("No or invalid argument given (\"%s\"), using default of 1 times\n", arguments);
 737                         times = 1;
 738                 }
 739
 740                 SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients) {
 741                         if (++count < times) {
 742                                 LOG("Skipping\n");
 743                                 continue;
 744                         }
 745
 746                         LOG("Focussing\n");
 747                         set_focus(conn, current, true);
 748                         break;
 749                 }
 750                 return;
 751         }
 752
 753         /* Select the next client matching the criteria parsed above */
 754         SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients)
 755                 if (client_is_floating(current) == floating_criteria) {
 756                         set_focus(conn, current, true);
 757                         break;
 758                 }
 759 }
 760
 761 /*
 762  * Goes through the list of arguments (for exec()) and checks if the given argument
 763  * is present. If not, it copies the arguments (because we cannot realloc it) and
 764  * appends the given argument.
 765  *
 766  */
 767 static char **append_argument(char **original, char *argument) {
 768         int num_args;
 769         for (num_args = 0; original[num_args] != NULL; num_args++) {
 770                 LOG("original argument: \"%s\"\n", original[num_args]);
 771                 /* If the argument is already present we return the original pointer */
 772                 if (strcmp(original[num_args], argument) == 0)
 773                         return original;
 774         }
 775         /* Copy the original array */
 776         char **result = smalloc((num_args+2) * sizeof(char*));
 777         memcpy(result, original, num_args * sizeof(char*));
 778         result[num_args] = argument;
 779         result[num_args+1] = NULL;
 780
 781         return result;
 782 }
 783
 784 /*
 785  * Switch to next or previous existing workspace
 786  *
 787  */
 788 static void next_previous_workspace(xcb_connection_t *conn, int direction) {
 789         Workspace *ws = c_ws;
 790
 791         if (direction == 'n') {
 792                 while ((ws = TAILQ_NEXT(ws, workspaces)) != TAILQ_END(workspaces_head)) {
 793                         if (ws->screen == NULL)
 794                                 continue;
 795
 796                         workspace_show(conn, ws->num + 1);
 797                         return;
 798                 }
 799         } else if (direction == 'p') {
 800                 while ((ws = TAILQ_PREV(ws, workspaces_head, workspaces)) != TAILQ_END(workspaces)) {
 801                         if (ws->screen == NULL)
 802                                 continue;
 803
 804                         workspace_show(conn, ws->num + 1);
 805                         return;
 806                 }
 807         }
 808 }
 809
 810 static void parse_resize_command(xcb_connection_t *conn, Client *last_focused, const char *command) {
 811         int first, second;
 812         resize_orientation_t orientation = O_VERTICAL;
 813         Container *con = last_focused->container;
 814         Workspace *ws = con->workspace;
 815
 816         if (STARTS_WITH(command, "left")) {
 817                 if (con->col == 0)
 818                         return;
 819                 first = con->col - 1;
 820                 second = con->col;
 821                 command += strlen("left");
 822         } else if (STARTS_WITH(command, "right")) {
 823                 first = con->col + (con->colspan - 1);
 824                 LOG("column %d\n", first);
 825
 826                 if (!cell_exists(first, con->row) ||
 827                     (first == (ws->cols-1)))
 828                         return;
 829
 830                 second = first + 1;
 831                 command += strlen("right");
 832         } else if (STARTS_WITH(command, "top")) {
 833                 if (con->row == 0)
 834                         return;
 835                 first = con->row - 1;
 836                 second = con->row;
 837                 orientation = O_HORIZONTAL;
 838                 command += strlen("top");
 839         } else if (STARTS_WITH(command, "bottom")) {
 840                 first = con->row + (con->rowspan - 1);
 841                 if (!cell_exists(con->col, first) ||
 842                     (first == (ws->rows-1)))
 843                         return;
 844
 845                 second = first + 1;
 846                 orientation = O_HORIZONTAL;
 847                 command += strlen("bottom");
 848         } else {
 849                 LOG("Syntax: resize <left|right|top|bottom> [+|-]<pixels>\n");
 850                 return;
 851         }
 852
 853         int pixels = atoi(command);
 854         if (pixels == 0)
 855                 return;
 856
 857         resize_container(conn, ws, first, second, orientation, pixels);
 858 }
 859
 860 /*
 861  * Parses a command, see file CMDMODE for more information
 862  *
 863  */
 864 void parse_command(xcb_connection_t *conn, const char *command) {
 865         LOG("--- parsing command \"%s\" ---\n", command);
 866         /* Get the first client from focus stack because floating clients are not
 867          * in any container, therefore CUR_CELL is not appropriate. */
 868         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 869         if (last_focused == SLIST_END(&(c_ws->focus_stack)))
 870                 last_focused = NULL;
 871
 872         /* Hmm, just to be sure */
 873         if (command[0] == '\0')
 874                 return;
 875
 876         /* Is it an <exec>? Then execute the given command. */
 877         if (STARTS_WITH(command, "exec ")) {
 878                 LOG("starting \"%s\"\n", command + strlen("exec "));
 879                 start_application(command+strlen("exec "));
 880                 return;
 881         }
 882
 883         if (STARTS_WITH(command, "mark")) {
 884                 if (last_focused == NULL) {
 885                         LOG("There is no window to mark\n");
 886                         return;
 887                 }
 888                 const char *rest = command + strlen("mark");
 889                 while (*rest == ' ')
 890                         rest++;
 891                 if (*rest == '\0') {
 892                         LOG("interactive mark starting\n");
 893                         start_application("i3-input -p 'mark ' -l 1 -P 'Mark: '");
 894                 } else {
 895                         LOG("mark with \"%s\"\n", rest);
 896                         client_mark(conn, last_focused, rest);
 897                 }
 898                 return;
 899         }
 900
 901         if (STARTS_WITH(command, "goto")) {
 902                 const char *rest = command + strlen("goto");
 903                 while (*rest == ' ')
 904                         rest++;
 905                 if (*rest == '\0') {
 906                         LOG("interactive go to mark starting\n");
 907                         start_application("i3-input -p 'goto ' -l 1 -P 'Goto: '");
 908                 } else {
 909                         LOG("go to \"%s\"\n", rest);
 910                         jump_to_mark(conn, rest);
 911                 }
 912                 return;
 913         }
 914
 915         if (STARTS_WITH(command, "stack-limit ")) {
 916                 if (last_focused == NULL || client_is_floating(last_focused)) {
 917                         LOG("No container focused\n");
 918                         return;
 919                 }
 920                 const char *rest = command + strlen("stack-limit ");
 921                 if (strncmp(rest, "rows ", strlen("rows ")) == 0) {
 922                         last_focused->container->stack_limit = STACK_LIMIT_ROWS;
 923                         rest += strlen("rows ");
 924                 } else if (strncmp(rest, "cols ", strlen("cols ")) == 0) {
 925                         last_focused->container->stack_limit = STACK_LIMIT_COLS;
 926                         rest += strlen("cols ");
 927                 } else {
 928                         LOG("Syntax: stack-limit <cols|rows> <limit>\n");
 929                         return;
 930                 }
 931
 932                 last_focused->container->stack_limit_value = atoi(rest);
 933                 if (last_focused->container->stack_limit_value == 0)
 934                         last_focused->container->stack_limit = STACK_LIMIT_NONE;
 935
 936                 return;
 937         }
 938
 939         if (STARTS_WITH(command, "resize ")) {
 940                 if (last_focused == NULL)
 941                         return;
 942                 const char *rest = command + strlen("resize ");
 943                 parse_resize_command(conn, last_focused, rest);
 944                 return;
 945         }
 946
 947         if (STARTS_WITH(command, "mode ")) {
 948                 const char *rest = command + strlen("mode ");
 949                 switch_mode(conn, rest);
 950                 return;
 951         }
 952
 953         /* Is it an <exit>? */
 954         if (STARTS_WITH(command, "exit")) {
 955                 LOG("User issued exit-command, exiting without error.\n");
 956                 exit(EXIT_SUCCESS);
 957         }
 958
 959         /* Is it a <reload>? */
 960         if (STARTS_WITH(command, "reload")) {
 961                 load_configuration(conn, NULL, true);
 962                 return;
 963         }
 964
 965         /* Is it <restart>? Then restart in place. */
 966         if (STARTS_WITH(command, "restart")) {
 967                 LOG("restarting \"%s\"...\n", start_argv[0]);
 968                 /* make sure -a is in the argument list or append it */
 969                 start_argv = append_argument(start_argv, "-a");
 970
 971                 execvp(start_argv[0], start_argv);
 972                 /* not reached */
 973         }
 974
 975         if (STARTS_WITH(command, "kill")) {
 976                 if (last_focused == NULL) {
 977                         LOG("There is no window to kill\n");
 978                         return;
 979                 }
 980
 981                 LOG("Killing current window\n");
 982                 client_kill(conn, last_focused);
 983                 return;
 984         }
 985
 986         /* Is it a jump to a specified workspace, row, col? */
 987         if (STARTS_WITH(command, "jump ")) {
 988                 const char *arguments = command + strlen("jump ");
 989                 if (arguments[0] == '"')
 990                         jump_to_window(conn, arguments);
 991                 else jump_to_container(conn, arguments);
 992                 return;
 993         }
 994
 995         /* Should we travel the focus stack? */
 996         if (STARTS_WITH(command, "focus")) {
 997                 const char *arguments = command + strlen("focus ");
 998                 travel_focus_stack(conn, arguments);
 999                 return;
1000         }
1001
1002         /* Is it 'f' for fullscreen? */
1003         if (command[0] == 'f') {
1004                 if (last_focused == NULL)
1005                         return;
1006                 client_toggle_fullscreen(conn, last_focused);
1007                 return;
1008         }
1009
1010         /* Is it just 's' for stacking or 'd' for default? */
1011         if ((command[0] == 's' || command[0] == 'd' || command[0] == 'T') && (command[1] == '\0')) {
1012                 if (last_focused != NULL && client_is_floating(last_focused)) {
1013                         LOG("not switching, this is a floating client\n");
1014                         return;
1015                 }
1016                 LOG("Switching mode for current container\n");
1017                 int new_mode = MODE_DEFAULT;
1018                 if (command[0] == 's')
1019                         new_mode = MODE_STACK;
1020                 if (command[0] == 'T')
1021                         new_mode = MODE_TABBED;
1022                 switch_layout_mode(conn, CUR_CELL, new_mode);
1023                 return;
1024         }
1025
1026         /* Is it 'bn' (border normal), 'bp' (border 1pixel) or 'bb' (border borderless)? */
1027         /* or even 'bt' (toggle border: 'bp' -> 'bb' -> 'bn' ) */
1028         if (command[0] == 'b') {
1029                 if (last_focused == NULL) {
1030                         LOG("No window focused, cannot change border type\n");
1031                         return;
1032                 }
1033
1034                 char com = command[1];
1035                 if (command[1] == 't') {
1036                         if (last_focused->titlebar_position == TITLEBAR_TOP &&
1037                             !last_focused->borderless)
1038                             com = 'p';
1039                         else if (last_focused->titlebar_position == TITLEBAR_OFF &&
1040                                  !last_focused->borderless)
1041                             com = 'b';
1042                         else com = 'n';
1043                 }
1044
1045                 client_change_border(conn, last_focused, com);
1046                 return;
1047         }
1048
1049         if (command[0] == 'H') {
1050                 LOG("Hiding all floating windows\n");
1051                 floating_toggle_hide(conn, c_ws);
1052                 return;
1053         }
1054
1055         enum { WITH_WINDOW, WITH_CONTAINER, WITH_WORKSPACE, WITH_SCREEN } with = WITH_WINDOW;
1056
1057         /* Is it a <with>? */
1058         if (command[0] == 'w') {
1059                 command++;
1060                 /* TODO: implement */
1061                 if (command[0] == 'c') {
1062                         with = WITH_CONTAINER;
1063                         command++;
1064                 } else if (command[0] == 'w') {
1065                         with = WITH_WORKSPACE;
1066                         command++;
1067                 } else if (command[0] == 's') {
1068                         with = WITH_SCREEN;
1069                         command++;
1070                 } else {
1071                         LOG("not yet implemented.\n");
1072                         return;
1073                 }
1074         }
1075
1076         /* Is it 't' for toggle tiling/floating? */
1077         if (command[0] == 't') {
1078                 if (with == WITH_WORKSPACE) {
1079                         c_ws->auto_float = !c_ws->auto_float;
1080                         LOG("autofloat is now %d\n", c_ws->auto_float);
1081                         return;
1082                 }
1083                 if (last_focused == NULL) {
1084                         LOG("Cannot toggle tiling/floating: workspace empty\n");
1085                         return;
1086                 }
1087
1088                 Workspace *ws = last_focused->workspace;
1089
1090                 toggle_floating_mode(conn, last_focused, false);
1091                 /* delete all empty columns/rows */
1092                 cleanup_table(conn, ws);
1093
1094                 /* Fix colspan/rowspan if it’d overlap */
1095                 fix_colrowspan(conn, ws);
1096
1097                 render_workspace(conn, ws->screen, ws);
1098
1099                 /* Re-focus the client because cleanup_table sets the focus to the last
1100                  * focused client inside a container only. */
1101                 set_focus(conn, last_focused, true);
1102
1103                 return;
1104         }
1105
1106         /* Is it 'n' or 'p' for next/previous workspace? (nw) */
1107         if ((command[0] == 'n' || command[0] == 'p') && command[1] == 'w') {
1108                next_previous_workspace(conn, command[0]);
1109                return;
1110         }
1111
1112         /* It’s a normal <cmd> */
1113         char *rest = NULL;
1114         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
1115         direction_t direction;
1116         int times = strtol(command, &rest, 10);
1117         if (rest == NULL) {
1118                 LOG("Invalid command (\"%s\")\n", command);
1119                 return;
1120         }
1121
1122         if (*rest == '\0') {
1123                 /* No rest? This was a workspace number, not a times specification */
1124                 workspace_show(conn, times);
1125                 return;
1126         }
1127
1128         if (*rest == 'm' || *rest == 's') {
1129                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
1130                 rest++;
1131         }
1132
1133         int workspace = strtol(rest, &rest, 10);
1134
1135         if (rest == NULL) {
1136                 LOG("Invalid command (\"%s\")\n", command);
1137                 return;
1138         }
1139
1140         if (*rest == '\0') {
1141                 if (last_focused != NULL && client_is_floating(last_focused))
1142                         move_floating_window_to_workspace(conn, last_focused, workspace);
1143                 else move_current_window_to_workspace(conn, workspace);
1144                 return;
1145         }
1146
1147         if (last_focused == NULL) {
1148                 LOG("Not performing (no window found)\n");
1149                 return;
1150         }
1151
1152         if (client_is_floating(last_focused) &&
1153             (action != ACTION_FOCUS && action != ACTION_MOVE)) {
1154                 LOG("Not performing (floating)\n");
1155                 return;
1156         }
1157
1158         /* Now perform action to <where> */
1159         while (*rest != '\0') {
1160                 if (*rest == 'h')
1161                         direction = D_LEFT;
1162                 else if (*rest == 'j')
1163                         direction = D_DOWN;
1164                 else if (*rest == 'k')
1165                         direction = D_UP;
1166                 else if (*rest == 'l')
1167                         direction = D_RIGHT;
1168                 else {
1169                         LOG("unknown direction: %c\n", *rest);
1170                         return;
1171                 }
1172                 rest++;
1173
1174                 if (action == ACTION_FOCUS) {
1175                         if (with == WITH_SCREEN) {
1176                                 focus_thing(conn, direction, THING_SCREEN);
1177                                 continue;
1178                         }
1179                         if (client_is_floating(last_focused)) {
1180                                 floating_focus_direction(conn, last_focused, direction);
1181                                 continue;
1182                         }
1183                         focus_thing(conn, direction, (with == WITH_WINDOW ? THING_WINDOW : THING_CONTAINER));
1184                         continue;
1185                 }
1186
1187                 if (action == ACTION_MOVE) {
1188                         if (with == WITH_SCREEN) {
1189                                 /* TODO: this should swap the screen’s contents
1190                                  * (e.g. all workspaces) with the next/previous/…
1191                                  * screen */
1192                                 LOG("Not yet implemented\n");
1193                                 continue;
1194                         }
1195                         if (client_is_floating(last_focused)) {
1196                                 floating_move(conn, last_focused, direction);
1197                                 continue;
1198                         }
1199                         if (with == WITH_WINDOW)
1200                                 move_current_window(conn, direction);
1201                         else move_current_container(conn, direction);
1202                         continue;
1203                 }
1204
1205                 if (action == ACTION_SNAP) {
1206                         if (with == WITH_SCREEN) {
1207                                 LOG("You cannot snap a screen (it makes no sense).\n");
1208                                 continue;
1209                         }
1210                         snap_current_container(conn, direction);
1211                         continue;
1212                 }
1213         }
1214 }