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
  33 bool focus_window_in_container(xcb_connection_t *conn, Container *container, direction_t direction) {
  34         /* If this container is empty, we’re done */
  35         if (container->currently_focused == NULL)
  36                 return false;
  37
  38         /* Get the previous/next client or wrap around */
  39         Client *candidate = NULL;
  40         if (direction == D_UP) {
  41                 if ((candidate = CIRCLEQ_PREV_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  42                         candidate = CIRCLEQ_LAST(&(container->clients));
  43         }
  44         else if (direction == D_DOWN) {
  45                 if ((candidate = CIRCLEQ_NEXT_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
  46                         candidate = CIRCLEQ_FIRST(&(container->clients));
  47         } else LOG("Direction not implemented!\n");
  48
  49         /* If we could not switch, the container contains exactly one client. We return false */
  50         if (candidate == container->currently_focused)
  51                 return false;
  52
  53         /* Set focus */
  54         set_focus(conn, candidate, true);
  55
  56         return true;
  57 }
  58
  59 typedef enum { THING_WINDOW, THING_CONTAINER, THING_SCREEN } thing_t;
  60
  61 static void jump_to_mark(xcb_connection_t *conn, const char *mark) {
  62         Client *current;
  63         LOG("Jumping to \"%s\"\n", mark);
  64
  65         for (int c = 0; c < 10; c++)
  66                 SLIST_FOREACH(current, &(workspaces[c].focus_stack), focus_clients) {
  67                         if (current->mark == NULL || strcmp(current->mark, mark) != 0)
  68                                 continue;
  69
  70                         set_focus(conn, current, true);
  71                         return;
  72                 }
  73
  74         LOG("No window with this mark found\n");
  75 }
  76
  77 static void focus_thing(xcb_connection_t *conn, direction_t direction, thing_t thing) {
  78         LOG("focusing direction %d\n", direction);
  79
  80         int new_row = current_row,
  81             new_col = current_col;
  82         Container *container = CUR_CELL;
  83         Workspace *t_ws = c_ws;
  84
  85         /* Makes sure new_col and new_row are within bounds of the new workspace */
  86         void check_colrow_boundaries() {
  87                 if (new_col >= t_ws->cols)
  88                         new_col = (t_ws->cols - 1);
  89                 if (new_row >= t_ws->rows)
  90                         new_row = (t_ws->rows - 1);
  91         }
  92
  93         /* There always is a container. If not, current_col or current_row is wrong */
  94         assert(container != NULL);
  95
  96         if (container->workspace->fullscreen_client != NULL) {
  97                 LOG("You're in fullscreen mode. Won't switch focus\n");
  98                 return;
  99         }
 100
 101         /* For focusing screens, situation is different: we get the rect
 102          * of the current screen, then get the screen which is on its
 103          * right/left/bottom/top and just switch to the workspace on
 104          * the target screen. */
 105         if (thing == THING_SCREEN) {
 106                 i3Screen *cs = c_ws->screen;
 107                 assert(cs != NULL);
 108                 Rect bounds = cs->rect;
 109
 110                 if (direction == D_RIGHT)
 111                         bounds.x += bounds.width;
 112                 else if (direction == D_LEFT)
 113                         bounds.x -= bounds.width;
 114                 else if (direction == D_UP)
 115                         bounds.y -= bounds.height;
 116                 else bounds.y += bounds.height;
 117
 118                 i3Screen *target = get_screen_containing(bounds.x, bounds.y);
 119                 if (target == NULL) {
 120                         LOG("Target screen NULL\n");
 121                         /* Wrap around if the target screen is out of bounds */
 122                         if (direction == D_RIGHT)
 123                                 target = get_screen_most(D_LEFT, cs);
 124                         else if (direction == D_LEFT)
 125                                 target = get_screen_most(D_RIGHT, cs);
 126                         else if (direction == D_UP)
 127                                 target = get_screen_most(D_DOWN, cs);
 128                         else target = get_screen_most(D_UP, cs);
 129                 }
 130
 131                 LOG("Switching to ws %d\n", target->current_workspace + 1);
 132                 workspace_show(conn, target->current_workspace + 1);
 133                 return;
 134         }
 135
 136         /* TODO: for horizontal default layout, this has to be expanded to LEFT/RIGHT */
 137         if (direction == D_UP || direction == D_DOWN) {
 138                 if (thing == THING_WINDOW)
 139                         /* Let’s see if we can perform up/down focus in the current container */
 140                         if (focus_window_in_container(conn, container, direction))
 141                                 return;
 142
 143                 if (direction == D_DOWN && cell_exists(current_col, current_row+1))
 144                         new_row = current_row + t_ws->table[current_col][current_row]->rowspan;
 145                 else if (direction == D_UP && cell_exists(current_col, current_row-1)) {
 146                         /* Set new_row as a sane default, but it may get overwritten in a second */
 147                         new_row--;
 148
 149                         /* Search from the top to correctly handle rowspanned containers */
 150                         for (int rows = 0; rows < current_row; rows += t_ws->table[current_col][rows]->rowspan) {
 151                                 if (new_row > (rows + (t_ws->table[current_col][rows]->rowspan - 1)))
 152                                         continue;
 153
 154                                 new_row = rows;
 155                                 break;
 156                         }
 157                 } else {
 158                         /* Let’s see if there is a screen down/up there to which we can switch */
 159                         LOG("container is at %d with height %d\n", container->y, container->height);
 160                         i3Screen *screen;
 161                         int destination_y = (direction == D_UP ? (container->y - 1) : (container->y + container->height + 1));
 162                         if ((screen = get_screen_containing(container->x, destination_y)) == NULL) {
 163                                 LOG("Wrapping screen around vertically\n");
 164                                 /* No screen found? Then wrap */
 165                                 screen = get_screen_most((direction == D_UP ? D_DOWN : D_UP), container->workspace->screen);
 166                         }
 167                         t_ws = &(workspaces[screen->current_workspace]);
 168                         new_row = (direction == D_UP ? (t_ws->rows - 1) : 0);
 169                 }
 170
 171                 check_colrow_boundaries();
 172
 173                 LOG("new_col = %d, new_row = %d\n", new_col, new_row);
 174                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
 175                         LOG("Cell empty, checking for colspanned client above...\n");
 176                         for (int cols = 0; cols < new_col; cols += t_ws->table[cols][new_row]->colspan) {
 177                                 if (new_col > (cols + (t_ws->table[cols][new_row]->colspan - 1)))
 178                                         continue;
 179
 180                                 new_col = cols;
 181                                 break;
 182                         }
 183                         LOG("Fixed it to new col %d\n", new_col);
 184                 }
 185         } else if (direction == D_LEFT || direction == D_RIGHT) {
 186                 if (direction == D_RIGHT && cell_exists(current_col+1, current_row))
 187                         new_col = current_col + t_ws->table[current_col][current_row]->colspan;
 188                 else if (direction == D_LEFT && cell_exists(current_col-1, current_row)) {
 189                         /* Set new_col as a sane default, but it may get overwritten in a second */
 190                         new_col--;
 191
 192                         /* Search from the left to correctly handle colspanned containers */
 193                         for (int cols = 0; cols < current_col; cols += t_ws->table[cols][current_row]->colspan) {
 194                                 if (new_col > (cols + (t_ws->table[cols][current_row]->colspan - 1)))
 195                                         continue;
 196
 197                                 new_col = cols;
 198                                 break;
 199                         }
 200                 } else {
 201                         /* Let’s see if there is a screen left/right here to which we can switch */
 202                         LOG("container is at %d with width %d\n", container->x, container->width);
 203                         i3Screen *screen;
 204                         int destination_x = (direction == D_LEFT ? (container->x - 1) : (container->x + container->width + 1));
 205                         if ((screen = get_screen_containing(destination_x, container->y)) == NULL) {
 206                                 LOG("Wrapping screen around horizontally\n");
 207                                 screen = get_screen_most((direction == D_LEFT ? D_RIGHT : D_LEFT), container->workspace->screen);
 208                         }
 209                         t_ws = &(workspaces[screen->current_workspace]);
 210                         new_col = (direction == D_LEFT ? (t_ws->cols - 1) : 0);
 211                 }
 212
 213                 check_colrow_boundaries();
 214
 215                 LOG("new_col = %d, new_row = %d\n", new_col, new_row);
 216                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
 217                         LOG("Cell empty, checking for rowspanned client above...\n");
 218                         for (int rows = 0; rows < new_row; rows += t_ws->table[new_col][rows]->rowspan) {
 219                                 if (new_row > (rows + (t_ws->table[new_col][rows]->rowspan - 1)))
 220                                         continue;
 221
 222                                 new_row = rows;
 223                                 break;
 224                         }
 225                         LOG("Fixed it to new row %d\n", new_row);
 226                 }
 227         } else {
 228                 LOG("direction unhandled\n");
 229                 return;
 230         }
 231
 232         check_colrow_boundaries();
 233
 234         if (t_ws->table[new_col][new_row]->currently_focused != NULL)
 235                 set_focus(conn, t_ws->table[new_col][new_row]->currently_focused, true);
 236 }
 237
 238 /*
 239  * Tries to move the window inside its current container.
 240  *
 241  * Returns true if the window could be moved, false otherwise.
 242  *
 243  */
 244 static bool move_current_window_in_container(xcb_connection_t *conn, Client *client,
 245                 direction_t direction) {
 246         assert(client->container != NULL);
 247
 248         Client *other = (direction == D_UP ? CIRCLEQ_PREV(client, clients) :
 249                                              CIRCLEQ_NEXT(client, clients));
 250
 251         if (other == CIRCLEQ_END(&(client->container->clients)))
 252                 return false;
 253
 254         LOG("i can do that\n");
 255         /* We can move the client inside its current container */
 256         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 257         if (direction == D_UP)
 258                 CIRCLEQ_INSERT_BEFORE(&(client->container->clients), other, client, clients);
 259         else CIRCLEQ_INSERT_AFTER(&(client->container->clients), other, client, clients);
 260         render_layout(conn);
 261         return true;
 262 }
 263
 264 /*
 265  * Moves the current window or whole container to the given direction, creating a column/row if
 266  * necessary.
 267  *
 268  */
 269 static void move_current_window(xcb_connection_t *conn, direction_t direction) {
 270         LOG("moving window to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 271                                             (direction == D_LEFT ? "left" : "right"))));
 272         /* Get current window */
 273         Container *container = CUR_CELL,
 274                   *new = NULL;
 275
 276         /* There has to be a container, see focus_window() */
 277         assert(container != NULL);
 278
 279         /* If there is no window or the dock window is focused, we’re done */
 280         if (container->currently_focused == NULL ||
 281             container->currently_focused->dock)
 282                 return;
 283
 284         /* As soon as the client is moved away, the last focused client in the old
 285          * container needs to get focus, if any. Therefore, we save it here. */
 286         Client *current_client = container->currently_focused;
 287         Client *to_focus = get_last_focused_client(conn, container, current_client);
 288
 289         if (to_focus == NULL) {
 290                 to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 291                 if (to_focus == NULL)
 292                         to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 293         }
 294
 295         switch (direction) {
 296                 case D_LEFT:
 297                         /* If we’re at the left-most position, move the rest of the table right */
 298                         if (current_col == 0) {
 299                                 expand_table_cols_at_head(c_ws);
 300                                 new = CUR_CELL;
 301                         } else
 302                                 new = CUR_TABLE[--current_col][current_row];
 303                         break;
 304                 case D_RIGHT:
 305                         if (current_col == (c_ws->cols-1))
 306                                 expand_table_cols(c_ws);
 307
 308                         new = CUR_TABLE[++current_col][current_row];
 309                         break;
 310                 case D_UP:
 311                         if (move_current_window_in_container(conn, current_client, D_UP))
 312                                 return;
 313
 314                         /* if we’re at the up-most position, move the rest of the table down */
 315                         if (current_row == 0) {
 316                                 expand_table_rows_at_head(c_ws);
 317                                 new = CUR_CELL;
 318                         } else
 319                                 new = CUR_TABLE[current_col][--current_row];
 320                         break;
 321                 case D_DOWN:
 322                         if (move_current_window_in_container(conn, current_client, D_DOWN))
 323                                 return;
 324
 325                         if (current_row == (c_ws->rows-1))
 326                                 expand_table_rows(c_ws);
 327
 328                         new = CUR_TABLE[current_col][++current_row];
 329                         break;
 330                 /* To make static analyzers happy: */
 331                 default:
 332                         return;
 333         }
 334
 335         /* Remove it from the old container and put it into the new one */
 336         client_remove_from_container(conn, current_client, container, true);
 337
 338         if (new->currently_focused != NULL)
 339                 CIRCLEQ_INSERT_AFTER(&(new->clients), new->currently_focused, current_client, clients);
 340         else CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
 341         SLIST_INSERT_HEAD(&(new->workspace->focus_stack), current_client, focus_clients);
 342
 343         /* Update data structures */
 344         current_client->container = new;
 345         current_client->workspace = new->workspace;
 346         container->currently_focused = to_focus;
 347         new->currently_focused = current_client;
 348
 349         Workspace *workspace = container->workspace;
 350
 351         /* delete all empty columns/rows */
 352         cleanup_table(conn, workspace);
 353
 354         /* Fix colspan/rowspan if it’d overlap */
 355         fix_colrowspan(conn, workspace);
 356
 357         render_workspace(conn, workspace->screen, workspace);
 358         xcb_flush(conn);
 359
 360         set_focus(conn, current_client, true);
 361 }
 362
 363 static void move_current_container(xcb_connection_t *conn, direction_t direction) {
 364         LOG("moving container to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 365                                             (direction == D_LEFT ? "left" : "right"))));
 366         /* Get current window */
 367         Container *container = CUR_CELL,
 368                   *new = NULL;
 369
 370         Container **old = &CUR_CELL;
 371
 372         /* There has to be a container, see focus_window() */
 373         assert(container != NULL);
 374
 375         switch (direction) {
 376                 case D_LEFT:
 377                         /* If we’re at the left-most position, move the rest of the table right */
 378                         if (current_col == 0) {
 379                                 expand_table_cols_at_head(c_ws);
 380                                 new = CUR_CELL;
 381                                 old = &CUR_TABLE[current_col+1][current_row];
 382                         } else
 383                                 new = CUR_TABLE[--current_col][current_row];
 384                         break;
 385                 case D_RIGHT:
 386                         if (current_col == (c_ws->cols-1))
 387                                 expand_table_cols(c_ws);
 388
 389                         new = CUR_TABLE[++current_col][current_row];
 390                         break;
 391                 case D_UP:
 392                         /* if we’re at the up-most position, move the rest of the table down */
 393                         if (current_row == 0) {
 394                                 expand_table_rows_at_head(c_ws);
 395                                 new = CUR_CELL;
 396                                 old = &CUR_TABLE[current_col][current_row+1];
 397                         } else
 398                                 new = CUR_TABLE[current_col][--current_row];
 399                         break;
 400                 case D_DOWN:
 401                         if (current_row == (c_ws->rows-1))
 402                                 expand_table_rows(c_ws);
 403
 404                         new = CUR_TABLE[current_col][++current_row];
 405                         break;
 406                 /* To make static analyzers happy: */
 407                 default:
 408                         return;
 409         }
 410
 411         LOG("old = %d,%d and new = %d,%d\n", container->col, container->row, new->col, new->row);
 412
 413         /* Swap the containers */
 414         int col = new->col;
 415         int row = new->row;
 416
 417         *old = new;
 418         new->col = container->col;
 419         new->row = container->row;
 420
 421         CUR_CELL = container;
 422         container->col = col;
 423         container->row = row;
 424
 425         Workspace *workspace = container->workspace;
 426
 427         /* delete all empty columns/rows */
 428         cleanup_table(conn, workspace);
 429
 430         /* Fix colspan/rowspan if it’d overlap */
 431         fix_colrowspan(conn, workspace);
 432
 433         render_layout(conn);
 434 }
 435
 436 /*
 437  * "Snaps" the current container (not possible for windows, because it works at table base)
 438  * to the given direction, that is, adjusts cellspan/rowspan
 439  *
 440  */
 441 static void snap_current_container(xcb_connection_t *conn, direction_t direction) {
 442         LOG("snapping container to direction %d\n", direction);
 443
 444         Container *container = CUR_CELL;
 445
 446         assert(container != NULL);
 447
 448         switch (direction) {
 449                 case D_LEFT:
 450                         /* Snap to the left is actually a move to the left and then a snap right */
 451                         if (!cell_exists(container->col - 1, container->row) ||
 452                             CUR_TABLE[container->col-1][container->row]->currently_focused != NULL) {
 453                                 LOG("cannot snap to left - the cell is already used\n");
 454                                 return;
 455                         }
 456
 457                         move_current_window(conn, D_LEFT);
 458                         snap_current_container(conn, D_RIGHT);
 459                         return;
 460                 case D_RIGHT: {
 461                         /* Check if the cell is used */
 462                         int new_col = container->col + container->colspan;
 463                         for (int i = 0; i < container->rowspan; i++)
 464                                 if (!cell_exists(new_col, container->row + i) ||
 465                                     CUR_TABLE[new_col][container->row + i]->currently_focused != NULL) {
 466                                         LOG("cannot snap to right - the cell is already used\n");
 467                                         return;
 468                                 }
 469
 470                         /* Check if there are other cells with rowspan, which are in our way.
 471                          * If so, reduce their rowspan. */
 472                         for (int i = container->row-1; i >= 0; i--) {
 473                                 LOG("we got cell %d, %d with rowspan %d\n",
 474                                                 new_col, i, CUR_TABLE[new_col][i]->rowspan);
 475                                 while ((CUR_TABLE[new_col][i]->rowspan-1) >= (container->row - i))
 476                                         CUR_TABLE[new_col][i]->rowspan--;
 477                                 LOG("new rowspan = %d\n", CUR_TABLE[new_col][i]->rowspan);
 478                         }
 479
 480                         container->colspan++;
 481                         break;
 482                 }
 483                 case D_UP:
 484                         if (!cell_exists(container->col, container->row - 1) ||
 485                             CUR_TABLE[container->col][container->row-1]->currently_focused != NULL) {
 486                                 LOG("cannot snap to top - the cell is already used\n");
 487                                 return;
 488                         }
 489
 490                         move_current_window(conn, D_UP);
 491                         snap_current_container(conn, D_DOWN);
 492                         return;
 493                 case D_DOWN: {
 494                         LOG("snapping down\n");
 495                         int new_row = container->row + container->rowspan;
 496                         for (int i = 0; i < container->colspan; i++)
 497                                 if (!cell_exists(container->col + i, new_row) ||
 498                                     CUR_TABLE[container->col + i][new_row]->currently_focused != NULL) {
 499                                         LOG("cannot snap down - the cell is already used\n");
 500                                         return;
 501                                 }
 502
 503                         for (int i = container->col-1; i >= 0; i--) {
 504                                 LOG("we got cell %d, %d with colspan %d\n",
 505                                                 i, new_row, CUR_TABLE[i][new_row]->colspan);
 506                                 while ((CUR_TABLE[i][new_row]->colspan-1) >= (container->col - i))
 507                                         CUR_TABLE[i][new_row]->colspan--;
 508                                 LOG("new colspan = %d\n", CUR_TABLE[i][new_row]->colspan);
 509
 510                         }
 511
 512                         container->rowspan++;
 513                         break;
 514                 }
 515                 /* To make static analyzers happy: */
 516                 default:
 517                         return;
 518         }
 519
 520         render_layout(conn);
 521 }
 522
 523 static void move_floating_window_to_workspace(xcb_connection_t *conn, Client *client, int workspace) {
 524         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 525         Workspace *t_ws = &(workspaces[workspace-1]),
 526                   *old_ws = client->workspace;
 527
 528         LOG("moving floating\n");
 529
 530         workspace_initialize(t_ws, c_ws->screen);
 531
 532         /* Check if there is already a fullscreen client on the destination workspace and
 533          * stop moving if so. */
 534         if (client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 535                 LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 536                 return;
 537         }
 538
 539         floating_assign_to_workspace(client, t_ws);
 540
 541         /* If we’re moving it to an invisible screen, we need to unmap it */
 542         if (!workspace_is_visible(t_ws)) {
 543                 LOG("This workspace is not visible, unmapping\n");
 544                 client_unmap(conn, client);
 545         } else {
 546                 /* If this is not the case, we move the window to a workspace
 547                  * which is on another screen, so we also need to adjust its
 548                  * coordinates. */
 549                 LOG("before x = %d, y = %d\n", client->rect.x, client->rect.y);
 550                 uint32_t relative_x = client->rect.x - old_ws->rect.x,
 551                          relative_y = client->rect.y - old_ws->rect.y;
 552                 LOG("rel_x = %d, rel_y = %d\n", relative_x, relative_y);
 553                 client->rect.x = t_ws->rect.x + relative_x;
 554                 client->rect.y = t_ws->rect.y + relative_y;
 555                 LOG("after x = %d, y = %d\n", client->rect.x, client->rect.y);
 556                 reposition_client(conn, client);
 557                 xcb_flush(conn);
 558         }
 559
 560         LOG("done\n");
 561
 562         render_layout(conn);
 563
 564         if (workspace_is_visible(t_ws))
 565                 set_focus(conn, client, true);
 566 }
 567
 568 /*
 569  * Moves the currently selected window to the given workspace
 570  *
 571  */
 572 static void move_current_window_to_workspace(xcb_connection_t *conn, int workspace) {
 573         LOG("Moving current window to workspace %d\n", workspace);
 574
 575         Container *container = CUR_CELL;
 576
 577         assert(container != NULL);
 578
 579         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 580         Workspace *t_ws = &(workspaces[workspace-1]);
 581
 582         Client *current_client = container->currently_focused;
 583         if (current_client == NULL) {
 584                 LOG("No currently focused client in current container.\n");
 585                 return;
 586         }
 587         Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 588         if (to_focus == NULL)
 589                 to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 590
 591         workspace_initialize(t_ws, container->workspace->screen);
 592         /* Check if there is already a fullscreen client on the destination workspace and
 593          * stop moving if so. */
 594         if (current_client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 595                 LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 596                 return;
 597         }
 598
 599         Container *to_container = t_ws->table[t_ws->current_col][t_ws->current_row];
 600
 601         assert(to_container != NULL);
 602
 603         client_remove_from_container(conn, current_client, container, true);
 604         if (container->workspace->fullscreen_client == current_client)
 605                 container->workspace->fullscreen_client = NULL;
 606
 607         /* TODO: insert it to the correct position */
 608         CIRCLEQ_INSERT_TAIL(&(to_container->clients), current_client, clients);
 609
 610         SLIST_INSERT_HEAD(&(to_container->workspace->focus_stack), current_client, focus_clients);
 611         LOG("Moved.\n");
 612
 613         current_client->container = to_container;
 614         current_client->workspace = to_container->workspace;
 615         container->currently_focused = to_focus;
 616         to_container->currently_focused = current_client;
 617
 618         /* If we’re moving it to an invisible screen, we need to unmap it */
 619         if (!workspace_is_visible(to_container->workspace)) {
 620                 LOG("This workspace is not visible, unmapping\n");
 621                 client_unmap(conn, current_client);
 622         } else {
 623                 if (current_client->fullscreen) {
 624                         LOG("Calling client_enter_fullscreen again\n");
 625                         client_enter_fullscreen(conn, current_client);
 626                 }
 627         }
 628
 629         /* delete all empty columns/rows */
 630         cleanup_table(conn, container->workspace);
 631
 632         render_layout(conn);
 633
 634         if (workspace_is_visible(to_container->workspace))
 635                 set_focus(conn, current_client, true);
 636 }
 637
 638 /*
 639  * Jumps to the given window class / title.
 640  * Title is matched using strstr, that is, matches if it appears anywhere
 641  * in the string. Regular expressions seem to be a bit overkill here. However,
 642  * if we need them for something else somewhen, we may introduce them here, too.
 643  *
 644  */
 645 static void jump_to_window(xcb_connection_t *conn, const char *arguments) {
 646         char *classtitle;
 647         Client *client;
 648
 649         /* The first character is a quote, this was checked before */
 650         classtitle = sstrdup(arguments+1);
 651         /* The last character is a quote, we just set it to NULL */
 652         classtitle[strlen(classtitle)-1] = '\0';
 653
 654         if ((client = get_matching_client(conn, classtitle, NULL)) == NULL) {
 655                 free(classtitle);
 656                 LOG("No matching client found.\n");
 657                 return;
 658         }
 659
 660         free(classtitle);
 661         set_focus(conn, client, true);
 662 }
 663
 664 /*
 665  * Jump directly to the specified workspace, row and col.
 666  * Great for reaching windows that you always keep in the same spot (hello irssi, I'm looking at you)
 667  *
 668  */
 669 static void jump_to_container(xcb_connection_t *conn, const char *arguments) {
 670         int ws, row, col;
 671         int result;
 672
 673         result = sscanf(arguments, "%d %d %d", &ws, &col, &row);
 674         LOG("Jump called with %d parameters (\"%s\")\n", result, arguments);
 675
 676         /* No match? Either no arguments were specified, or no numbers */
 677         if (result < 1) {
 678                 LOG("At least one valid argument required\n");
 679                 return;
 680         }
 681
 682         /* Move to the target workspace */
 683         workspace_show(conn, ws);
 684
 685         if (result < 3)
 686                 return;
 687
 688         LOG("Boundary-checking col %d, row %d... (max cols %d, max rows %d)\n", col, row, c_ws->cols, c_ws->rows);
 689
 690         /* Move to row/col */
 691         if (row >= c_ws->rows)
 692                 row = c_ws->rows - 1;
 693         if (col >= c_ws->cols)
 694                 col = c_ws->cols - 1;
 695
 696         LOG("Jumping to col %d, row %d\n", col, row);
 697         if (c_ws->table[col][row]->currently_focused != NULL)
 698                 set_focus(conn, c_ws->table[col][row]->currently_focused, true);
 699 }
 700
 701 /*
 702  * Travels the focus stack by the given number of times (or once, if no argument
 703  * was specified). That is, selects the window you were in before you focused
 704  * the current window.
 705  *
 706  * The special values 'floating' (select the next floating window), 'tiling'
 707  * (select the next tiling window), 'ft' (if the current window is floating,
 708  * select the next tiling window and vice-versa) are also valid
 709  *
 710  */
 711 static void travel_focus_stack(xcb_connection_t *conn, const char *arguments) {
 712         /* Start count at -1 to always skip the first element */
 713         int times, count = -1;
 714         Client *current;
 715         bool floating_criteria;
 716
 717         /* Either it’s one of the special values… */
 718         if (strcasecmp(arguments, "floating") == 0) {
 719                 floating_criteria = true;
 720         } else if (strcasecmp(arguments, "tiling") == 0) {
 721                 floating_criteria = false;
 722         } else if (strcasecmp(arguments, "ft") == 0) {
 723                 Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 724                 if (last_focused == SLIST_END(&(c_ws->focus_stack))) {
 725                         LOG("Cannot select the next floating/tiling client because there is no client at all\n");
 726                         return;
 727                 }
 728
 729                 floating_criteria = !client_is_floating(last_focused);
 730         } else {
 731                 /* …or a number was specified */
 732                 if (sscanf(arguments, "%u", &times) != 1) {
 733                         LOG("No or invalid argument given (\"%s\"), using default of 1 times\n", arguments);
 734                         times = 1;
 735                 }
 736
 737                 SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients) {
 738                         if (++count < times) {
 739                                 LOG("Skipping\n");
 740                                 continue;
 741                         }
 742
 743                         LOG("Focussing\n");
 744                         set_focus(conn, current, true);
 745                         break;
 746                 }
 747                 return;
 748         }
 749
 750         /* Select the next client matching the criteria parsed above */
 751         SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients)
 752                 if (client_is_floating(current) == floating_criteria) {
 753                         set_focus(conn, current, true);
 754                         break;
 755                 }
 756 }
 757
 758 /*
 759  * Goes through the list of arguments (for exec()) and checks if the given argument
 760  * is present. If not, it copies the arguments (because we cannot realloc it) and
 761  * appends the given argument.
 762  *
 763  */
 764 static char **append_argument(char **original, char *argument) {
 765         int num_args;
 766         for (num_args = 0; original[num_args] != NULL; num_args++) {
 767                 LOG("original argument: \"%s\"\n", original[num_args]);
 768                 /* If the argument is already present we return the original pointer */
 769                 if (strcmp(original[num_args], argument) == 0)
 770                         return original;
 771         }
 772         /* Copy the original array */
 773         char **result = smalloc((num_args+2) * sizeof(char*));
 774         memcpy(result, original, num_args * sizeof(char*));
 775         result[num_args] = argument;
 776         result[num_args+1] = NULL;
 777
 778         return result;
 779 }
 780
 781 /*
 782  * Switch to next or previous existing workspace
 783  *
 784  */
 785 static void next_previous_workspace(xcb_connection_t *conn, int direction) {
 786         Workspace *t_ws;
 787         int i;
 788
 789         if (direction == 'n') {
 790                 /* If we are on the last workspace, we cannot go any further */
 791                 if (c_ws->num == 9)
 792                         return;
 793
 794                 for (i = c_ws->num + 1; i <= 9; i++) {
 795                         t_ws = &(workspaces[i]);
 796                         if (t_ws->screen != NULL)
 797                                 break;
 798                 }
 799         } else if (direction == 'p') {
 800                 if (c_ws->num == 0)
 801                         return;
 802                 for (i = c_ws->num - 1; i >= 0 ; i--) {
 803                         t_ws = &(workspaces[i]);
 804                         if (t_ws->screen != NULL)
 805                                 break;
 806                 }
 807         }
 808
 809         if (t_ws->screen != NULL)
 810                 workspace_show(conn, i+1);
 811 }
 812
 813 /*
 814  * Parses a command, see file CMDMODE for more information
 815  *
 816  */
 817 void parse_command(xcb_connection_t *conn, const char *command) {
 818         LOG("--- parsing command \"%s\" ---\n", command);
 819         /* Get the first client from focus stack because floating clients are not
 820          * in any container, therefore CUR_CELL is not appropriate. */
 821         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 822         if (last_focused == SLIST_END(&(c_ws->focus_stack)))
 823                 last_focused = NULL;
 824
 825         /* Hmm, just to be sure */
 826         if (command[0] == '\0')
 827                 return;
 828
 829         /* Is it an <exec>? Then execute the given command. */
 830         if (STARTS_WITH(command, "exec ")) {
 831                 LOG("starting \"%s\"\n", command + strlen("exec "));
 832                 start_application(command+strlen("exec "));
 833                 return;
 834         }
 835
 836         if (STARTS_WITH(command, "mark")) {
 837                 if (last_focused == NULL) {
 838                         LOG("There is no window to mark\n");
 839                         return;
 840                 }
 841                 const char *rest = command + strlen("mark");
 842                 while (*rest == ' ')
 843                         rest++;
 844                 if (*rest == '\0') {
 845                         LOG("interactive mark starting\n");
 846                         start_application("i3-input -p 'mark ' -l 1 -P 'Mark: '");
 847                 } else {
 848                         LOG("mark with \"%s\"\n", rest);
 849                         client_mark(conn, last_focused, rest);
 850                 }
 851                 return;
 852         }
 853
 854         if (STARTS_WITH(command, "goto")) {
 855                 const char *rest = command + strlen("goto");
 856                 while (*rest == ' ')
 857                         rest++;
 858                 if (*rest == '\0') {
 859                         LOG("interactive go to mark starting\n");
 860                         start_application("i3-input -p 'goto ' -l 1 -P 'Goto: '");
 861                 } else {
 862                         LOG("go to \"%s\"\n", rest);
 863                         jump_to_mark(conn, rest);
 864                 }
 865                 return;
 866         }
 867
 868         /* Is it an <exit>? */
 869         if (STARTS_WITH(command, "exit")) {
 870                 LOG("User issued exit-command, exiting without error.\n");
 871                 exit(EXIT_SUCCESS);
 872         }
 873
 874         /* Is it a <reload>? */
 875         if (STARTS_WITH(command, "reload")) {
 876                 load_configuration(conn, NULL, true);
 877                 return;
 878         }
 879
 880         /* Is it <restart>? Then restart in place. */
 881         if (STARTS_WITH(command, "restart")) {
 882                 LOG("restarting \"%s\"...\n", start_argv[0]);
 883                 /* make sure -a is in the argument list or append it */
 884                 start_argv = append_argument(start_argv, "-a");
 885
 886                 execvp(start_argv[0], start_argv);
 887                 /* not reached */
 888         }
 889
 890         if (STARTS_WITH(command, "kill")) {
 891                 if (last_focused == NULL) {
 892                         LOG("There is no window to kill\n");
 893                         return;
 894                 }
 895
 896                 LOG("Killing current window\n");
 897                 client_kill(conn, last_focused);
 898                 return;
 899         }
 900
 901         /* Is it a jump to a specified workspace, row, col? */
 902         if (STARTS_WITH(command, "jump ")) {
 903                 const char *arguments = command + strlen("jump ");
 904                 if (arguments[0] == '"')
 905                         jump_to_window(conn, arguments);
 906                 else jump_to_container(conn, arguments);
 907                 return;
 908         }
 909
 910         /* Should we travel the focus stack? */
 911         if (STARTS_WITH(command, "focus")) {
 912                 const char *arguments = command + strlen("focus ");
 913                 travel_focus_stack(conn, arguments);
 914                 return;
 915         }
 916
 917         /* Is it 'f' for fullscreen? */
 918         if (command[0] == 'f') {
 919                 if (last_focused == NULL)
 920                         return;
 921                 client_toggle_fullscreen(conn, last_focused);
 922                 return;
 923         }
 924
 925         /* Is it just 's' for stacking or 'd' for default? */
 926         if ((command[0] == 's' || command[0] == 'd' || command[0] == 'T') && (command[1] == '\0')) {
 927                 if (last_focused != NULL && client_is_floating(last_focused)) {
 928                         LOG("not switching, this is a floating client\n");
 929                         return;
 930                 }
 931                 LOG("Switching mode for current container\n");
 932                 int new_mode = MODE_DEFAULT;
 933                 if (command[0] == 's')
 934                         new_mode = MODE_STACK;
 935                 if (command[0] == 'T')
 936                         new_mode = MODE_TABBED;
 937                 switch_layout_mode(conn, CUR_CELL, new_mode);
 938                 return;
 939         }
 940
 941         /* Is it 'bn' (border normal), 'bp' (border 1pixel) or 'bb' (border borderless)? */
 942         /* or even 'bt' (toggle border: 'bp' -> 'bb' -> 'bn' ) */
 943         if (command[0] == 'b') {
 944                 if (last_focused == NULL) {
 945                         LOG("No window focused, cannot change border type\n");
 946                         return;
 947                 }
 948
 949                 char com = command[1];
 950                 if (command[1] == 't') {
 951                         if (last_focused->titlebar_position == TITLEBAR_TOP &&
 952                             !last_focused->borderless)
 953                             com = 'p';
 954                         else if (last_focused->titlebar_position == TITLEBAR_OFF &&
 955                                  !last_focused->borderless)
 956                             com = 'b';
 957                         else com = 'n';
 958                 }
 959
 960                 client_change_border(conn, last_focused, com);
 961                 return;
 962         }
 963
 964         if (command[0] == 'H') {
 965                 LOG("Hiding all floating windows\n");
 966                 floating_toggle_hide(conn, c_ws);
 967                 return;
 968         }
 969
 970         enum { WITH_WINDOW, WITH_CONTAINER, WITH_WORKSPACE, WITH_SCREEN } with = WITH_WINDOW;
 971
 972         /* Is it a <with>? */
 973         if (command[0] == 'w') {
 974                 command++;
 975                 /* TODO: implement */
 976                 if (command[0] == 'c') {
 977                         with = WITH_CONTAINER;
 978                         command++;
 979                 } else if (command[0] == 'w') {
 980                         with = WITH_WORKSPACE;
 981                         command++;
 982                 } else if (command[0] == 's') {
 983                         with = WITH_SCREEN;
 984                         command++;
 985                 } else {
 986                         LOG("not yet implemented.\n");
 987                         return;
 988                 }
 989         }
 990
 991         /* Is it 't' for toggle tiling/floating? */
 992         if (command[0] == 't') {
 993                 if (with == WITH_WORKSPACE) {
 994                         c_ws->auto_float = !c_ws->auto_float;
 995                         LOG("autofloat is now %d\n", c_ws->auto_float);
 996                         return;
 997                 }
 998                 if (last_focused == NULL) {
 999                         LOG("Cannot toggle tiling/floating: workspace empty\n");
1000                         return;
1001                 }
1002
1003                 toggle_floating_mode(conn, last_focused, false);
1004                 /* delete all empty columns/rows */
1005                 cleanup_table(conn, last_focused->workspace);
1006
1007                 /* Fix colspan/rowspan if it’d overlap */
1008                 fix_colrowspan(conn, last_focused->workspace);
1009
1010                 render_workspace(conn, last_focused->workspace->screen, last_focused->workspace);
1011
1012                 /* Re-focus the client because cleanup_table sets the focus to the last
1013                  * focused client inside a container only. */
1014                 set_focus(conn, last_focused, true);
1015
1016                 return;
1017         }
1018
1019         /* Is it 'n' or 'p' for next/previous workspace? (nw) */
1020         if ((command[0] == 'n' || command[0] == 'p') && command[1] == 'w') {
1021                next_previous_workspace(conn, command[0]);
1022                return;
1023         }
1024
1025         /* It’s a normal <cmd> */
1026         char *rest = NULL;
1027         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
1028         direction_t direction;
1029         int times = strtol(command, &rest, 10);
1030         if (rest == NULL) {
1031                 LOG("Invalid command (\"%s\")\n", command);
1032                 return;
1033         }
1034
1035         if (*rest == '\0') {
1036                 /* No rest? This was a workspace number, not a times specification */
1037                 workspace_show(conn, times);
1038                 return;
1039         }
1040
1041         if (*rest == 'm' || *rest == 's') {
1042                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
1043                 rest++;
1044         }
1045
1046         int workspace = strtol(rest, &rest, 10);
1047
1048         if (rest == NULL) {
1049                 LOG("Invalid command (\"%s\")\n", command);
1050                 return;
1051         }
1052
1053         if (*rest == '\0') {
1054                 if (last_focused != NULL && client_is_floating(last_focused))
1055                         move_floating_window_to_workspace(conn, last_focused, workspace);
1056                 else move_current_window_to_workspace(conn, workspace);
1057                 return;
1058         }
1059
1060         if (last_focused == NULL) {
1061                 LOG("Not performing (no window found)\n");
1062                 return;
1063         }
1064
1065         if (client_is_floating(last_focused) &&
1066             (action != ACTION_FOCUS && action != ACTION_MOVE)) {
1067                 LOG("Not performing (floating)\n");
1068                 return;
1069         }
1070
1071         /* Now perform action to <where> */
1072         while (*rest != '\0') {
1073                 if (*rest == 'h')
1074                         direction = D_LEFT;
1075                 else if (*rest == 'j')
1076                         direction = D_DOWN;
1077                 else if (*rest == 'k')
1078                         direction = D_UP;
1079                 else if (*rest == 'l')
1080                         direction = D_RIGHT;
1081                 else {
1082                         LOG("unknown direction: %c\n", *rest);
1083                         return;
1084                 }
1085                 rest++;
1086
1087                 if (action == ACTION_FOCUS) {
1088                         if (with == WITH_SCREEN) {
1089                                 focus_thing(conn, direction, THING_SCREEN);
1090                                 continue;
1091                         }
1092                         if (client_is_floating(last_focused)) {
1093                                 floating_focus_direction(conn, last_focused, direction);
1094                                 continue;
1095                         }
1096                         focus_thing(conn, direction, (with == WITH_WINDOW ? THING_WINDOW : THING_CONTAINER));
1097                         continue;
1098                 }
1099
1100                 if (action == ACTION_MOVE) {
1101                         if (with == WITH_SCREEN) {
1102                                 /* TODO: this should swap the screen’s contents
1103                                  * (e.g. all workspaces) with the next/previous/…
1104                                  * screen */
1105                                 LOG("Not yet implemented\n");
1106                                 continue;
1107                         }
1108                         if (client_is_floating(last_focused)) {
1109                                 floating_move(conn, last_focused, direction);
1110                                 continue;
1111                         }
1112                         if (with == WITH_WINDOW)
1113                                 move_current_window(conn, direction);
1114                         else move_current_container(conn, direction);
1115                         continue;
1116                 }
1117
1118                 if (action == ACTION_SNAP) {
1119                         if (with == WITH_SCREEN) {
1120                                 LOG("You cannot snap a screen (it makes no sense).\n");
1121                                 continue;
1122                         }
1123                         snap_current_container(conn, direction);
1124                         continue;
1125                 }
1126         }
1127 }