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         for (int c = 0; c < num_workspaces; c++)
  67                 SLIST_FOREACH(current, &(workspaces[c].focus_stack), focus_clients) {
  68                         if (current->mark == NULL || strcmp(current->mark, mark) != 0)
  69                                 continue;
  70
  71                         set_focus(conn, current, true);
  72                         return;
  73                 }
  74
  75         LOG("No window with this mark found\n");
  76 }
  77
  78 static void focus_thing(xcb_connection_t *conn, direction_t direction, thing_t thing) {
  79         LOG("focusing direction %d\n", direction);
  80
  81         int new_row = current_row,
  82             new_col = current_col;
  83         Container *container = CUR_CELL;
  84         Workspace *t_ws = c_ws;
  85
  86         /* Makes sure new_col and new_row are within bounds of the new workspace */
  87         void check_colrow_boundaries() {
  88                 if (new_col >= t_ws->cols)
  89                         new_col = (t_ws->cols - 1);
  90                 if (new_row >= t_ws->rows)
  91                         new_row = (t_ws->rows - 1);
  92         }
  93
  94         /* There always is a container. If not, current_col or current_row is wrong */
  95         assert(container != NULL);
  96
  97         if (container->workspace->fullscreen_client != NULL) {
  98                 LOG("You're in fullscreen mode. Won't switch focus\n");
  99                 return;
 100         }
 101
 102         /* For focusing screens, situation is different: we get the rect
 103          * of the current screen, then get the screen which is on its
 104          * right/left/bottom/top and just switch to the workspace on
 105          * the target screen. */
 106         if (thing == THING_SCREEN) {
 107                 i3Screen *cs = c_ws->screen;
 108                 assert(cs != NULL);
 109                 Rect bounds = cs->rect;
 110
 111                 if (direction == D_RIGHT)
 112                         bounds.x += bounds.width;
 113                 else if (direction == D_LEFT)
 114                         bounds.x -= bounds.width;
 115                 else if (direction == D_UP)
 116                         bounds.y -= bounds.height;
 117                 else bounds.y += bounds.height;
 118
 119                 i3Screen *target = get_screen_containing(bounds.x, bounds.y);
 120                 if (target == NULL) {
 121                         LOG("Target screen NULL\n");
 122                         /* Wrap around if the target screen is out of bounds */
 123                         if (direction == D_RIGHT)
 124                                 target = get_screen_most(D_LEFT, cs);
 125                         else if (direction == D_LEFT)
 126                                 target = get_screen_most(D_RIGHT, cs);
 127                         else if (direction == D_UP)
 128                                 target = get_screen_most(D_DOWN, cs);
 129                         else target = get_screen_most(D_UP, cs);
 130                 }
 131
 132                 LOG("Switching to ws %d\n", target->current_workspace + 1);
 133                 workspace_show(conn, target->current_workspace + 1);
 134                 return;
 135         }
 136
 137         /* TODO: for horizontal default layout, this has to be expanded to LEFT/RIGHT */
 138         if (direction == D_UP || direction == D_DOWN) {
 139                 if (thing == THING_WINDOW)
 140                         /* Let’s see if we can perform up/down focus in the current container */
 141                         if (focus_window_in_container(conn, container, direction))
 142                                 return;
 143
 144                 if (direction == D_DOWN && cell_exists(current_col, current_row+1))
 145                         new_row = current_row + t_ws->table[current_col][current_row]->rowspan;
 146                 else if (direction == D_UP && cell_exists(current_col, current_row-1)) {
 147                         /* Set new_row as a sane default, but it may get overwritten in a second */
 148                         new_row--;
 149
 150                         /* Search from the top to correctly handle rowspanned containers */
 151                         for (int rows = 0; rows < current_row; rows += t_ws->table[current_col][rows]->rowspan) {
 152                                 if (new_row > (rows + (t_ws->table[current_col][rows]->rowspan - 1)))
 153                                         continue;
 154
 155                                 new_row = rows;
 156                                 break;
 157                         }
 158                 } else {
 159                         /* Let’s see if there is a screen down/up there to which we can switch */
 160                         LOG("container is at %d with height %d\n", container->y, container->height);
 161                         i3Screen *screen;
 162                         int destination_y = (direction == D_UP ? (container->y - 1) : (container->y + container->height + 1));
 163                         if ((screen = get_screen_containing(container->x, destination_y)) == NULL) {
 164                                 LOG("Wrapping screen around vertically\n");
 165                                 /* No screen found? Then wrap */
 166                                 screen = get_screen_most((direction == D_UP ? D_DOWN : D_UP), container->workspace->screen);
 167                         }
 168                         t_ws = workspace_get(screen->current_workspace);
 169                         new_row = (direction == D_UP ? (t_ws->rows - 1) : 0);
 170                 }
 171
 172                 check_colrow_boundaries();
 173
 174                 LOG("new_col = %d, new_row = %d\n", new_col, new_row);
 175                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
 176                         LOG("Cell empty, checking for colspanned client above...\n");
 177                         for (int cols = 0; cols < new_col; cols += t_ws->table[cols][new_row]->colspan) {
 178                                 if (new_col > (cols + (t_ws->table[cols][new_row]->colspan - 1)))
 179                                         continue;
 180
 181                                 new_col = cols;
 182                                 break;
 183                         }
 184                         LOG("Fixed it to new col %d\n", new_col);
 185                 }
 186         } else if (direction == D_LEFT || direction == D_RIGHT) {
 187                 if (direction == D_RIGHT && cell_exists(current_col+1, current_row))
 188                         new_col = current_col + t_ws->table[current_col][current_row]->colspan;
 189                 else if (direction == D_LEFT && cell_exists(current_col-1, current_row)) {
 190                         /* Set new_col as a sane default, but it may get overwritten in a second */
 191                         new_col--;
 192
 193                         /* Search from the left to correctly handle colspanned containers */
 194                         for (int cols = 0; cols < current_col; cols += t_ws->table[cols][current_row]->colspan) {
 195                                 if (new_col > (cols + (t_ws->table[cols][current_row]->colspan - 1)))
 196                                         continue;
 197
 198                                 new_col = cols;
 199                                 break;
 200                         }
 201                 } else {
 202                         /* Let’s see if there is a screen left/right here to which we can switch */
 203                         LOG("container is at %d with width %d\n", container->x, container->width);
 204                         i3Screen *screen;
 205                         int destination_x = (direction == D_LEFT ? (container->x - 1) : (container->x + container->width + 1));
 206                         if ((screen = get_screen_containing(destination_x, container->y)) == NULL) {
 207                                 LOG("Wrapping screen around horizontally\n");
 208                                 screen = get_screen_most((direction == D_LEFT ? D_RIGHT : D_LEFT), container->workspace->screen);
 209                         }
 210                         t_ws = workspace_get(screen->current_workspace);
 211                         new_col = (direction == D_LEFT ? (t_ws->cols - 1) : 0);
 212                 }
 213
 214                 check_colrow_boundaries();
 215
 216                 LOG("new_col = %d, new_row = %d\n", new_col, new_row);
 217                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
 218                         LOG("Cell empty, checking for rowspanned client above...\n");
 219                         for (int rows = 0; rows < new_row; rows += t_ws->table[new_col][rows]->rowspan) {
 220                                 if (new_row > (rows + (t_ws->table[new_col][rows]->rowspan - 1)))
 221                                         continue;
 222
 223                                 new_row = rows;
 224                                 break;
 225                         }
 226                         LOG("Fixed it to new row %d\n", new_row);
 227                 }
 228         } else {
 229                 LOG("direction unhandled\n");
 230                 return;
 231         }
 232
 233         check_colrow_boundaries();
 234
 235         if (t_ws->table[new_col][new_row]->currently_focused != NULL)
 236                 set_focus(conn, t_ws->table[new_col][new_row]->currently_focused, true);
 237 }
 238
 239 /*
 240  * Tries to move the window inside its current container.
 241  *
 242  * Returns true if the window could be moved, false otherwise.
 243  *
 244  */
 245 static bool move_current_window_in_container(xcb_connection_t *conn, Client *client,
 246                 direction_t direction) {
 247         assert(client->container != NULL);
 248
 249         Client *other = (direction == D_UP ? CIRCLEQ_PREV(client, clients) :
 250                                              CIRCLEQ_NEXT(client, clients));
 251
 252         if (other == CIRCLEQ_END(&(client->container->clients)))
 253                 return false;
 254
 255         LOG("i can do that\n");
 256         /* We can move the client inside its current container */
 257         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
 258         if (direction == D_UP)
 259                 CIRCLEQ_INSERT_BEFORE(&(client->container->clients), other, client, clients);
 260         else CIRCLEQ_INSERT_AFTER(&(client->container->clients), other, client, clients);
 261         render_layout(conn);
 262         return true;
 263 }
 264
 265 /*
 266  * Moves the current window or whole container to the given direction, creating a column/row if
 267  * necessary.
 268  *
 269  */
 270 static void move_current_window(xcb_connection_t *conn, direction_t direction) {
 271         LOG("moving window to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 272                                             (direction == D_LEFT ? "left" : "right"))));
 273         /* Get current window */
 274         Container *container = CUR_CELL,
 275                   *new = NULL;
 276
 277         /* There has to be a container, see focus_window() */
 278         assert(container != NULL);
 279
 280         /* If there is no window or the dock window is focused, we’re done */
 281         if (container->currently_focused == NULL ||
 282             container->currently_focused->dock)
 283                 return;
 284
 285         /* As soon as the client is moved away, the last focused client in the old
 286          * container needs to get focus, if any. Therefore, we save it here. */
 287         Client *current_client = container->currently_focused;
 288         Client *to_focus = get_last_focused_client(conn, container, current_client);
 289
 290         if (to_focus == NULL) {
 291                 to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 292                 if (to_focus == NULL)
 293                         to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 294         }
 295
 296         switch (direction) {
 297                 case D_LEFT:
 298                         /* If we’re at the left-most position, move the rest of the table right */
 299                         if (current_col == 0) {
 300                                 expand_table_cols_at_head(c_ws);
 301                                 new = CUR_CELL;
 302                         } else
 303                                 new = CUR_TABLE[--current_col][current_row];
 304                         break;
 305                 case D_RIGHT:
 306                         if (current_col == (c_ws->cols-1))
 307                                 expand_table_cols(c_ws);
 308
 309                         new = CUR_TABLE[++current_col][current_row];
 310                         break;
 311                 case D_UP:
 312                         if (move_current_window_in_container(conn, current_client, D_UP))
 313                                 return;
 314
 315                         /* if we’re at the up-most position, move the rest of the table down */
 316                         if (current_row == 0) {
 317                                 expand_table_rows_at_head(c_ws);
 318                                 new = CUR_CELL;
 319                         } else
 320                                 new = CUR_TABLE[current_col][--current_row];
 321                         break;
 322                 case D_DOWN:
 323                         if (move_current_window_in_container(conn, current_client, D_DOWN))
 324                                 return;
 325
 326                         if (current_row == (c_ws->rows-1))
 327                                 expand_table_rows(c_ws);
 328
 329                         new = CUR_TABLE[current_col][++current_row];
 330                         break;
 331                 /* To make static analyzers happy: */
 332                 default:
 333                         return;
 334         }
 335
 336         /* Remove it from the old container and put it into the new one */
 337         client_remove_from_container(conn, current_client, container, true);
 338
 339         if (new->currently_focused != NULL)
 340                 CIRCLEQ_INSERT_AFTER(&(new->clients), new->currently_focused, current_client, clients);
 341         else CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
 342         SLIST_INSERT_HEAD(&(new->workspace->focus_stack), current_client, focus_clients);
 343
 344         /* Update data structures */
 345         current_client->container = new;
 346         current_client->workspace = new->workspace;
 347         container->currently_focused = to_focus;
 348         new->currently_focused = current_client;
 349
 350         Workspace *workspace = container->workspace;
 351
 352         /* delete all empty columns/rows */
 353         cleanup_table(conn, workspace);
 354
 355         /* Fix colspan/rowspan if it’d overlap */
 356         fix_colrowspan(conn, workspace);
 357
 358         render_workspace(conn, workspace->screen, workspace);
 359         xcb_flush(conn);
 360
 361         set_focus(conn, current_client, true);
 362 }
 363
 364 static void move_current_container(xcb_connection_t *conn, direction_t direction) {
 365         LOG("moving container to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
 366                                             (direction == D_LEFT ? "left" : "right"))));
 367         /* Get current window */
 368         Container *container = CUR_CELL,
 369                   *new = NULL;
 370
 371         Container **old = &CUR_CELL;
 372
 373         /* There has to be a container, see focus_window() */
 374         assert(container != NULL);
 375
 376         switch (direction) {
 377                 case D_LEFT:
 378                         /* If we’re at the left-most position, move the rest of the table right */
 379                         if (current_col == 0) {
 380                                 expand_table_cols_at_head(c_ws);
 381                                 new = CUR_CELL;
 382                                 old = &CUR_TABLE[current_col+1][current_row];
 383                         } else
 384                                 new = CUR_TABLE[--current_col][current_row];
 385                         break;
 386                 case D_RIGHT:
 387                         if (current_col == (c_ws->cols-1))
 388                                 expand_table_cols(c_ws);
 389
 390                         new = CUR_TABLE[++current_col][current_row];
 391                         break;
 392                 case D_UP:
 393                         /* if we’re at the up-most position, move the rest of the table down */
 394                         if (current_row == 0) {
 395                                 expand_table_rows_at_head(c_ws);
 396                                 new = CUR_CELL;
 397                                 old = &CUR_TABLE[current_col][current_row+1];
 398                         } else
 399                                 new = CUR_TABLE[current_col][--current_row];
 400                         break;
 401                 case D_DOWN:
 402                         if (current_row == (c_ws->rows-1))
 403                                 expand_table_rows(c_ws);
 404
 405                         new = CUR_TABLE[current_col][++current_row];
 406                         break;
 407                 /* To make static analyzers happy: */
 408                 default:
 409                         return;
 410         }
 411
 412         LOG("old = %d,%d and new = %d,%d\n", container->col, container->row, new->col, new->row);
 413
 414         /* Swap the containers */
 415         int col = new->col;
 416         int row = new->row;
 417
 418         *old = new;
 419         new->col = container->col;
 420         new->row = container->row;
 421
 422         CUR_CELL = container;
 423         container->col = col;
 424         container->row = row;
 425
 426         Workspace *workspace = container->workspace;
 427
 428         /* delete all empty columns/rows */
 429         cleanup_table(conn, workspace);
 430
 431         /* Fix colspan/rowspan if it’d overlap */
 432         fix_colrowspan(conn, workspace);
 433
 434         render_layout(conn);
 435 }
 436
 437 /*
 438  * "Snaps" the current container (not possible for windows, because it works at table base)
 439  * to the given direction, that is, adjusts cellspan/rowspan
 440  *
 441  */
 442 static void snap_current_container(xcb_connection_t *conn, direction_t direction) {
 443         LOG("snapping container to direction %d\n", direction);
 444
 445         Container *container = CUR_CELL;
 446
 447         assert(container != NULL);
 448
 449         switch (direction) {
 450                 case D_LEFT:
 451                         /* Snap to the left is actually a move to the left and then a snap right */
 452                         if (!cell_exists(container->col - 1, container->row) ||
 453                             CUR_TABLE[container->col-1][container->row]->currently_focused != NULL) {
 454                                 LOG("cannot snap to left - the cell is already used\n");
 455                                 return;
 456                         }
 457
 458                         move_current_window(conn, D_LEFT);
 459                         snap_current_container(conn, D_RIGHT);
 460                         return;
 461                 case D_RIGHT: {
 462                         /* Check if the cell is used */
 463                         int new_col = container->col + container->colspan;
 464                         for (int i = 0; i < container->rowspan; i++)
 465                                 if (!cell_exists(new_col, container->row + i) ||
 466                                     CUR_TABLE[new_col][container->row + i]->currently_focused != NULL) {
 467                                         LOG("cannot snap to right - the cell is already used\n");
 468                                         return;
 469                                 }
 470
 471                         /* Check if there are other cells with rowspan, which are in our way.
 472                          * If so, reduce their rowspan. */
 473                         for (int i = container->row-1; i >= 0; i--) {
 474                                 LOG("we got cell %d, %d with rowspan %d\n",
 475                                                 new_col, i, CUR_TABLE[new_col][i]->rowspan);
 476                                 while ((CUR_TABLE[new_col][i]->rowspan-1) >= (container->row - i))
 477                                         CUR_TABLE[new_col][i]->rowspan--;
 478                                 LOG("new rowspan = %d\n", CUR_TABLE[new_col][i]->rowspan);
 479                         }
 480
 481                         container->colspan++;
 482                         break;
 483                 }
 484                 case D_UP:
 485                         if (!cell_exists(container->col, container->row - 1) ||
 486                             CUR_TABLE[container->col][container->row-1]->currently_focused != NULL) {
 487                                 LOG("cannot snap to top - the cell is already used\n");
 488                                 return;
 489                         }
 490
 491                         move_current_window(conn, D_UP);
 492                         snap_current_container(conn, D_DOWN);
 493                         return;
 494                 case D_DOWN: {
 495                         LOG("snapping down\n");
 496                         int new_row = container->row + container->rowspan;
 497                         for (int i = 0; i < container->colspan; i++)
 498                                 if (!cell_exists(container->col + i, new_row) ||
 499                                     CUR_TABLE[container->col + i][new_row]->currently_focused != NULL) {
 500                                         LOG("cannot snap down - the cell is already used\n");
 501                                         return;
 502                                 }
 503
 504                         for (int i = container->col-1; i >= 0; i--) {
 505                                 LOG("we got cell %d, %d with colspan %d\n",
 506                                                 i, new_row, CUR_TABLE[i][new_row]->colspan);
 507                                 while ((CUR_TABLE[i][new_row]->colspan-1) >= (container->col - i))
 508                                         CUR_TABLE[i][new_row]->colspan--;
 509                                 LOG("new colspan = %d\n", CUR_TABLE[i][new_row]->colspan);
 510
 511                         }
 512
 513                         container->rowspan++;
 514                         break;
 515                 }
 516                 /* To make static analyzers happy: */
 517                 default:
 518                         return;
 519         }
 520
 521         render_layout(conn);
 522 }
 523
 524 static void move_floating_window_to_workspace(xcb_connection_t *conn, Client *client, int workspace) {
 525         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 526         Workspace *t_ws = workspace_get(workspace-1),
 527                   *old_ws = client->workspace;
 528
 529         LOG("moving floating\n");
 530
 531         workspace_initialize(t_ws, c_ws->screen);
 532
 533         /* Check if there is already a fullscreen client on the destination workspace and
 534          * stop moving if so. */
 535         if (client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 536                 LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 537                 return;
 538         }
 539
 540         floating_assign_to_workspace(client, t_ws);
 541
 542         /* If we’re moving it to an invisible screen, we need to unmap it */
 543         if (!workspace_is_visible(t_ws)) {
 544                 LOG("This workspace is not visible, unmapping\n");
 545                 client_unmap(conn, client);
 546         } else {
 547                 /* If this is not the case, we move the window to a workspace
 548                  * which is on another screen, so we also need to adjust its
 549                  * coordinates. */
 550                 LOG("before x = %d, y = %d\n", client->rect.x, client->rect.y);
 551                 uint32_t relative_x = client->rect.x - old_ws->rect.x,
 552                          relative_y = client->rect.y - old_ws->rect.y;
 553                 LOG("rel_x = %d, rel_y = %d\n", relative_x, relative_y);
 554                 client->rect.x = t_ws->rect.x + relative_x;
 555                 client->rect.y = t_ws->rect.y + relative_y;
 556                 LOG("after x = %d, y = %d\n", client->rect.x, client->rect.y);
 557                 reposition_client(conn, client);
 558                 xcb_flush(conn);
 559         }
 560
 561         LOG("done\n");
 562
 563         render_layout(conn);
 564
 565         if (workspace_is_visible(t_ws))
 566                 set_focus(conn, client, true);
 567 }
 568
 569 /*
 570  * Moves the currently selected window to the given workspace
 571  *
 572  */
 573 static void move_current_window_to_workspace(xcb_connection_t *conn, int workspace) {
 574         LOG("Moving current window to workspace %d\n", workspace);
 575
 576         Container *container = CUR_CELL;
 577
 578         assert(container != NULL);
 579
 580         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
 581         Workspace *t_ws = workspace_get(workspace-1);
 582
 583         Client *current_client = container->currently_focused;
 584         if (current_client == NULL) {
 585                 LOG("No currently focused client in current container.\n");
 586                 return;
 587         }
 588         Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
 589         if (to_focus == NULL)
 590                 to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
 591
 592         workspace_initialize(t_ws, container->workspace->screen);
 593         /* Check if there is already a fullscreen client on the destination workspace and
 594          * stop moving if so. */
 595         if (current_client->fullscreen && (t_ws->fullscreen_client != NULL)) {
 596                 LOG("Not moving: Fullscreen client already existing on destination workspace.\n");
 597                 return;
 598         }
 599
 600         Container *to_container = t_ws->table[t_ws->current_col][t_ws->current_row];
 601
 602         assert(to_container != NULL);
 603
 604         client_remove_from_container(conn, current_client, container, true);
 605         if (container->workspace->fullscreen_client == current_client)
 606                 container->workspace->fullscreen_client = NULL;
 607
 608         /* TODO: insert it to the correct position */
 609         CIRCLEQ_INSERT_TAIL(&(to_container->clients), current_client, clients);
 610
 611         SLIST_INSERT_HEAD(&(to_container->workspace->focus_stack), current_client, focus_clients);
 612         LOG("Moved.\n");
 613
 614         current_client->container = to_container;
 615         current_client->workspace = to_container->workspace;
 616         container->currently_focused = to_focus;
 617         to_container->currently_focused = current_client;
 618
 619         /* If we’re moving it to an invisible screen, we need to unmap it */
 620         if (!workspace_is_visible(to_container->workspace)) {
 621                 LOG("This workspace is not visible, unmapping\n");
 622                 client_unmap(conn, current_client);
 623         } else {
 624                 if (current_client->fullscreen) {
 625                         LOG("Calling client_enter_fullscreen again\n");
 626                         client_enter_fullscreen(conn, current_client);
 627                 }
 628         }
 629
 630         /* delete all empty columns/rows */
 631         cleanup_table(conn, container->workspace);
 632
 633         render_layout(conn);
 634
 635         if (workspace_is_visible(to_container->workspace))
 636                 set_focus(conn, current_client, true);
 637 }
 638
 639 /*
 640  * Jumps to the given window class / title.
 641  * Title is matched using strstr, that is, matches if it appears anywhere
 642  * in the string. Regular expressions seem to be a bit overkill here. However,
 643  * if we need them for something else somewhen, we may introduce them here, too.
 644  *
 645  */
 646 static void jump_to_window(xcb_connection_t *conn, const char *arguments) {
 647         char *classtitle;
 648         Client *client;
 649
 650         /* The first character is a quote, this was checked before */
 651         classtitle = sstrdup(arguments+1);
 652         /* The last character is a quote, we just set it to NULL */
 653         classtitle[strlen(classtitle)-1] = '\0';
 654
 655         if ((client = get_matching_client(conn, classtitle, NULL)) == NULL) {
 656                 free(classtitle);
 657                 LOG("No matching client found.\n");
 658                 return;
 659         }
 660
 661         free(classtitle);
 662         set_focus(conn, client, true);
 663 }
 664
 665 /*
 666  * Jump directly to the specified workspace, row and col.
 667  * Great for reaching windows that you always keep in the same spot (hello irssi, I'm looking at you)
 668  *
 669  */
 670 static void jump_to_container(xcb_connection_t *conn, const char *arguments) {
 671         int ws, row, col;
 672         int result;
 673
 674         result = sscanf(arguments, "%d %d %d", &ws, &col, &row);
 675         LOG("Jump called with %d parameters (\"%s\")\n", result, arguments);
 676
 677         /* No match? Either no arguments were specified, or no numbers */
 678         if (result < 1) {
 679                 LOG("At least one valid argument required\n");
 680                 return;
 681         }
 682
 683         /* Move to the target workspace */
 684         workspace_show(conn, ws);
 685
 686         if (result < 3)
 687                 return;
 688
 689         LOG("Boundary-checking col %d, row %d... (max cols %d, max rows %d)\n", col, row, c_ws->cols, c_ws->rows);
 690
 691         /* Move to row/col */
 692         if (row >= c_ws->rows)
 693                 row = c_ws->rows - 1;
 694         if (col >= c_ws->cols)
 695                 col = c_ws->cols - 1;
 696
 697         LOG("Jumping to col %d, row %d\n", col, row);
 698         if (c_ws->table[col][row]->currently_focused != NULL)
 699                 set_focus(conn, c_ws->table[col][row]->currently_focused, true);
 700 }
 701
 702 /*
 703  * Travels the focus stack by the given number of times (or once, if no argument
 704  * was specified). That is, selects the window you were in before you focused
 705  * the current window.
 706  *
 707  * The special values 'floating' (select the next floating window), 'tiling'
 708  * (select the next tiling window), 'ft' (if the current window is floating,
 709  * select the next tiling window and vice-versa) are also valid
 710  *
 711  */
 712 static void travel_focus_stack(xcb_connection_t *conn, const char *arguments) {
 713         /* Start count at -1 to always skip the first element */
 714         int times, count = -1;
 715         Client *current;
 716         bool floating_criteria;
 717
 718         /* Either it’s one of the special values… */
 719         if (strcasecmp(arguments, "floating") == 0) {
 720                 floating_criteria = true;
 721         } else if (strcasecmp(arguments, "tiling") == 0) {
 722                 floating_criteria = false;
 723         } else if (strcasecmp(arguments, "ft") == 0) {
 724                 Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 725                 if (last_focused == SLIST_END(&(c_ws->focus_stack))) {
 726                         LOG("Cannot select the next floating/tiling client because there is no client at all\n");
 727                         return;
 728                 }
 729
 730                 floating_criteria = !client_is_floating(last_focused);
 731         } else {
 732                 /* …or a number was specified */
 733                 if (sscanf(arguments, "%u", &times) != 1) {
 734                         LOG("No or invalid argument given (\"%s\"), using default of 1 times\n", arguments);
 735                         times = 1;
 736                 }
 737
 738                 SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients) {
 739                         if (++count < times) {
 740                                 LOG("Skipping\n");
 741                                 continue;
 742                         }
 743
 744                         LOG("Focussing\n");
 745                         set_focus(conn, current, true);
 746                         break;
 747                 }
 748                 return;
 749         }
 750
 751         /* Select the next client matching the criteria parsed above */
 752         SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients)
 753                 if (client_is_floating(current) == floating_criteria) {
 754                         set_focus(conn, current, true);
 755                         break;
 756                 }
 757 }
 758
 759 /*
 760  * Goes through the list of arguments (for exec()) and checks if the given argument
 761  * is present. If not, it copies the arguments (because we cannot realloc it) and
 762  * appends the given argument.
 763  *
 764  */
 765 static char **append_argument(char **original, char *argument) {
 766         int num_args;
 767         for (num_args = 0; original[num_args] != NULL; num_args++) {
 768                 LOG("original argument: \"%s\"\n", original[num_args]);
 769                 /* If the argument is already present we return the original pointer */
 770                 if (strcmp(original[num_args], argument) == 0)
 771                         return original;
 772         }
 773         /* Copy the original array */
 774         char **result = smalloc((num_args+2) * sizeof(char*));
 775         memcpy(result, original, num_args * sizeof(char*));
 776         result[num_args] = argument;
 777         result[num_args+1] = NULL;
 778
 779         return result;
 780 }
 781
 782 /*
 783  * Switch to next or previous existing workspace
 784  *
 785  */
 786 static void next_previous_workspace(xcb_connection_t *conn, int direction) {
 787         Workspace *t_ws;
 788         int i;
 789
 790         if (direction == 'n') {
 791                 /* If we are on the last workspace, we cannot go any further */
 792                 if (c_ws->num == (num_workspaces-1))
 793                         return;
 794
 795                 for (i = c_ws->num + 1; i < num_workspaces; i++) {
 796                         t_ws = &(workspaces[i]);
 797                         if (t_ws->screen != NULL)
 798                                 break;
 799                 }
 800         } else if (direction == 'p') {
 801                 if (c_ws->num == 0)
 802                         return;
 803                 for (i = c_ws->num - 1; i >= 0 ; i--) {
 804                         t_ws = &(workspaces[i]);
 805                         if (t_ws->screen != NULL)
 806                                 break;
 807                 }
 808         }
 809
 810         if (t_ws->screen != NULL)
 811                 workspace_show(conn, i+1);
 812 }
 813
 814 static void parse_resize_command(xcb_connection_t *conn, Client *last_focused, const char *command) {
 815         int first, second;
 816         resize_orientation_t orientation = O_VERTICAL;
 817         Container *con = last_focused->container;
 818         Workspace *ws = con->workspace;
 819
 820         if (STARTS_WITH(command, "left")) {
 821                 if (con->col == 0)
 822                         return;
 823                 first = con->col - 1;
 824                 second = con->col;
 825                 command += strlen("left");
 826         } else if (STARTS_WITH(command, "right")) {
 827                 first = con->col + (con->colspan - 1);
 828                 LOG("column %d\n", first);
 829
 830                 if (!cell_exists(first, con->row) ||
 831                     (first == (ws->cols-1)))
 832                         return;
 833
 834                 second = first + 1;
 835                 command += strlen("right");
 836         } else if (STARTS_WITH(command, "top")) {
 837                 if (con->row == 0)
 838                         return;
 839                 first = con->row - 1;
 840                 second = con->row;
 841                 orientation = O_HORIZONTAL;
 842                 command += strlen("top");
 843         } else if (STARTS_WITH(command, "bottom")) {
 844                 first = con->row + (con->rowspan - 1);
 845                 if (!cell_exists(con->col, first) ||
 846                     (first == (ws->rows-1)))
 847                         return;
 848
 849                 second = first + 1;
 850                 orientation = O_HORIZONTAL;
 851                 command += strlen("bottom");
 852         } else {
 853                 LOG("Syntax: resize <left|right|top|bottom> [+|-]<pixels>\n");
 854                 return;
 855         }
 856
 857         int pixels = atoi(command);
 858         if (pixels == 0)
 859                 return;
 860
 861         resize_container(conn, ws, first, second, orientation, pixels);
 862 }
 863
 864 /*
 865  * Parses a command, see file CMDMODE for more information
 866  *
 867  */
 868 void parse_command(xcb_connection_t *conn, const char *command) {
 869         LOG("--- parsing command \"%s\" ---\n", command);
 870         /* Get the first client from focus stack because floating clients are not
 871          * in any container, therefore CUR_CELL is not appropriate. */
 872         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
 873         if (last_focused == SLIST_END(&(c_ws->focus_stack)))
 874                 last_focused = NULL;
 875
 876         /* Hmm, just to be sure */
 877         if (command[0] == '\0')
 878                 return;
 879
 880         /* Is it an <exec>? Then execute the given command. */
 881         if (STARTS_WITH(command, "exec ")) {
 882                 LOG("starting \"%s\"\n", command + strlen("exec "));
 883                 start_application(command+strlen("exec "));
 884                 return;
 885         }
 886
 887         if (STARTS_WITH(command, "mark")) {
 888                 if (last_focused == NULL) {
 889                         LOG("There is no window to mark\n");
 890                         return;
 891                 }
 892                 const char *rest = command + strlen("mark");
 893                 while (*rest == ' ')
 894                         rest++;
 895                 if (*rest == '\0') {
 896                         LOG("interactive mark starting\n");
 897                         start_application("i3-input -p 'mark ' -l 1 -P 'Mark: '");
 898                 } else {
 899                         LOG("mark with \"%s\"\n", rest);
 900                         client_mark(conn, last_focused, rest);
 901                 }
 902                 return;
 903         }
 904
 905         if (STARTS_WITH(command, "goto")) {
 906                 const char *rest = command + strlen("goto");
 907                 while (*rest == ' ')
 908                         rest++;
 909                 if (*rest == '\0') {
 910                         LOG("interactive go to mark starting\n");
 911                         start_application("i3-input -p 'goto ' -l 1 -P 'Goto: '");
 912                 } else {
 913                         LOG("go to \"%s\"\n", rest);
 914                         jump_to_mark(conn, rest);
 915                 }
 916                 return;
 917         }
 918
 919         if (STARTS_WITH(command, "stack-limit ")) {
 920                 if (last_focused == NULL || client_is_floating(last_focused)) {
 921                         LOG("No container focused\n");
 922                         return;
 923                 }
 924                 const char *rest = command + strlen("stack-limit ");
 925                 if (strncmp(rest, "rows ", strlen("rows ")) == 0) {
 926                         last_focused->container->stack_limit = STACK_LIMIT_ROWS;
 927                         rest += strlen("rows ");
 928                 } else if (strncmp(rest, "cols ", strlen("cols ")) == 0) {
 929                         last_focused->container->stack_limit = STACK_LIMIT_COLS;
 930                         rest += strlen("cols ");
 931                 } else {
 932                         LOG("Syntax: stack-limit <cols|rows> <limit>\n");
 933                         return;
 934                 }
 935
 936                 last_focused->container->stack_limit_value = atoi(rest);
 937                 if (last_focused->container->stack_limit_value == 0)
 938                         last_focused->container->stack_limit = STACK_LIMIT_NONE;
 939
 940                 return;
 941         }
 942
 943         if (STARTS_WITH(command, "resize ")) {
 944                 if (last_focused == NULL)
 945                         return;
 946                 const char *rest = command + strlen("resize ");
 947                 parse_resize_command(conn, last_focused, rest);
 948                 return;
 949         }
 950
 951         if (STARTS_WITH(command, "mode ")) {
 952                 const char *rest = command + strlen("mode ");
 953                 switch_mode(conn, rest);
 954                 return;
 955         }
 956
 957         /* Is it an <exit>? */
 958         if (STARTS_WITH(command, "exit")) {
 959                 LOG("User issued exit-command, exiting without error.\n");
 960                 exit(EXIT_SUCCESS);
 961         }
 962
 963         /* Is it a <reload>? */
 964         if (STARTS_WITH(command, "reload")) {
 965                 load_configuration(conn, NULL, true);
 966                 return;
 967         }
 968
 969         /* Is it <restart>? Then restart in place. */
 970         if (STARTS_WITH(command, "restart")) {
 971                 LOG("restarting \"%s\"...\n", start_argv[0]);
 972                 /* make sure -a is in the argument list or append it */
 973                 start_argv = append_argument(start_argv, "-a");
 974
 975                 execvp(start_argv[0], start_argv);
 976                 /* not reached */
 977         }
 978
 979         if (STARTS_WITH(command, "kill")) {
 980                 if (last_focused == NULL) {
 981                         LOG("There is no window to kill\n");
 982                         return;
 983                 }
 984
 985                 LOG("Killing current window\n");
 986                 client_kill(conn, last_focused);
 987                 return;
 988         }
 989
 990         /* Is it a jump to a specified workspace, row, col? */
 991         if (STARTS_WITH(command, "jump ")) {
 992                 const char *arguments = command + strlen("jump ");
 993                 if (arguments[0] == '"')
 994                         jump_to_window(conn, arguments);
 995                 else jump_to_container(conn, arguments);
 996                 return;
 997         }
 998
 999         /* Should we travel the focus stack? */
1000         if (STARTS_WITH(command, "focus")) {
1001                 const char *arguments = command + strlen("focus ");
1002                 travel_focus_stack(conn, arguments);
1003                 return;
1004         }
1005
1006         /* Is it 'f' for fullscreen? */
1007         if (command[0] == 'f') {
1008                 if (last_focused == NULL)
1009                         return;
1010                 client_toggle_fullscreen(conn, last_focused);
1011                 return;
1012         }
1013
1014         /* Is it just 's' for stacking or 'd' for default? */
1015         if ((command[0] == 's' || command[0] == 'd' || command[0] == 'T') && (command[1] == '\0')) {
1016                 if (last_focused != NULL && client_is_floating(last_focused)) {
1017                         LOG("not switching, this is a floating client\n");
1018                         return;
1019                 }
1020                 LOG("Switching mode for current container\n");
1021                 int new_mode = MODE_DEFAULT;
1022                 if (command[0] == 's')
1023                         new_mode = MODE_STACK;
1024                 if (command[0] == 'T')
1025                         new_mode = MODE_TABBED;
1026                 switch_layout_mode(conn, CUR_CELL, new_mode);
1027                 return;
1028         }
1029
1030         /* Is it 'bn' (border normal), 'bp' (border 1pixel) or 'bb' (border borderless)? */
1031         /* or even 'bt' (toggle border: 'bp' -> 'bb' -> 'bn' ) */
1032         if (command[0] == 'b') {
1033                 if (last_focused == NULL) {
1034                         LOG("No window focused, cannot change border type\n");
1035                         return;
1036                 }
1037
1038                 char com = command[1];
1039                 if (command[1] == 't') {
1040                         if (last_focused->titlebar_position == TITLEBAR_TOP &&
1041                             !last_focused->borderless)
1042                             com = 'p';
1043                         else if (last_focused->titlebar_position == TITLEBAR_OFF &&
1044                                  !last_focused->borderless)
1045                             com = 'b';
1046                         else com = 'n';
1047                 }
1048
1049                 client_change_border(conn, last_focused, com);
1050                 return;
1051         }
1052
1053         if (command[0] == 'H') {
1054                 LOG("Hiding all floating windows\n");
1055                 floating_toggle_hide(conn, c_ws);
1056                 return;
1057         }
1058
1059         enum { WITH_WINDOW, WITH_CONTAINER, WITH_WORKSPACE, WITH_SCREEN } with = WITH_WINDOW;
1060
1061         /* Is it a <with>? */
1062         if (command[0] == 'w') {
1063                 command++;
1064                 /* TODO: implement */
1065                 if (command[0] == 'c') {
1066                         with = WITH_CONTAINER;
1067                         command++;
1068                 } else if (command[0] == 'w') {
1069                         with = WITH_WORKSPACE;
1070                         command++;
1071                 } else if (command[0] == 's') {
1072                         with = WITH_SCREEN;
1073                         command++;
1074                 } else {
1075                         LOG("not yet implemented.\n");
1076                         return;
1077                 }
1078         }
1079
1080         /* Is it 't' for toggle tiling/floating? */
1081         if (command[0] == 't') {
1082                 if (with == WITH_WORKSPACE) {
1083                         c_ws->auto_float = !c_ws->auto_float;
1084                         LOG("autofloat is now %d\n", c_ws->auto_float);
1085                         return;
1086                 }
1087                 if (last_focused == NULL) {
1088                         LOG("Cannot toggle tiling/floating: workspace empty\n");
1089                         return;
1090                 }
1091
1092                 Workspace *ws = last_focused->workspace;
1093
1094                 toggle_floating_mode(conn, last_focused, false);
1095                 /* delete all empty columns/rows */
1096                 cleanup_table(conn, ws);
1097
1098                 /* Fix colspan/rowspan if it’d overlap */
1099                 fix_colrowspan(conn, ws);
1100
1101                 render_workspace(conn, ws->screen, ws);
1102
1103                 /* Re-focus the client because cleanup_table sets the focus to the last
1104                  * focused client inside a container only. */
1105                 set_focus(conn, last_focused, true);
1106
1107                 return;
1108         }
1109
1110         /* Is it 'n' or 'p' for next/previous workspace? (nw) */
1111         if ((command[0] == 'n' || command[0] == 'p') && command[1] == 'w') {
1112                next_previous_workspace(conn, command[0]);
1113                return;
1114         }
1115
1116         /* It’s a normal <cmd> */
1117         char *rest = NULL;
1118         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
1119         direction_t direction;
1120         int times = strtol(command, &rest, 10);
1121         if (rest == NULL) {
1122                 LOG("Invalid command (\"%s\")\n", command);
1123                 return;
1124         }
1125
1126         if (*rest == '\0') {
1127                 /* No rest? This was a workspace number, not a times specification */
1128                 workspace_show(conn, times);
1129                 return;
1130         }
1131
1132         if (*rest == 'm' || *rest == 's') {
1133                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
1134                 rest++;
1135         }
1136
1137         int workspace = strtol(rest, &rest, 10);
1138
1139         if (rest == NULL) {
1140                 LOG("Invalid command (\"%s\")\n", command);
1141                 return;
1142         }
1143
1144         if (*rest == '\0') {
1145                 if (last_focused != NULL && client_is_floating(last_focused))
1146                         move_floating_window_to_workspace(conn, last_focused, workspace);
1147                 else move_current_window_to_workspace(conn, workspace);
1148                 return;
1149         }
1150
1151         if (last_focused == NULL) {
1152                 LOG("Not performing (no window found)\n");
1153                 return;
1154         }
1155
1156         if (client_is_floating(last_focused) &&
1157             (action != ACTION_FOCUS && action != ACTION_MOVE)) {
1158                 LOG("Not performing (floating)\n");
1159                 return;
1160         }
1161
1162         /* Now perform action to <where> */
1163         while (*rest != '\0') {
1164                 if (*rest == 'h')
1165                         direction = D_LEFT;
1166                 else if (*rest == 'j')
1167                         direction = D_DOWN;
1168                 else if (*rest == 'k')
1169                         direction = D_UP;
1170                 else if (*rest == 'l')
1171                         direction = D_RIGHT;
1172                 else {
1173                         LOG("unknown direction: %c\n", *rest);
1174                         return;
1175                 }
1176                 rest++;
1177
1178                 if (action == ACTION_FOCUS) {
1179                         if (with == WITH_SCREEN) {
1180                                 focus_thing(conn, direction, THING_SCREEN);
1181                                 continue;
1182                         }
1183                         if (client_is_floating(last_focused)) {
1184                                 floating_focus_direction(conn, last_focused, direction);
1185                                 continue;
1186                         }
1187                         focus_thing(conn, direction, (with == WITH_WINDOW ? THING_WINDOW : THING_CONTAINER));
1188                         continue;
1189                 }
1190
1191                 if (action == ACTION_MOVE) {
1192                         if (with == WITH_SCREEN) {
1193                                 /* TODO: this should swap the screen’s contents
1194                                  * (e.g. all workspaces) with the next/previous/…
1195                                  * screen */
1196                                 LOG("Not yet implemented\n");
1197                                 continue;
1198                         }
1199                         if (client_is_floating(last_focused)) {
1200                                 floating_move(conn, last_focused, direction);
1201                                 continue;
1202                         }
1203                         if (with == WITH_WINDOW)
1204                                 move_current_window(conn, direction);
1205                         else move_current_container(conn, direction);
1206                         continue;
1207                 }
1208
1209                 if (action == ACTION_SNAP) {
1210                         if (with == WITH_SCREEN) {
1211                                 LOG("You cannot snap a screen (it makes no sense).\n");
1212                                 continue;
1213                         }
1214                         snap_current_container(conn, direction);
1215                         continue;
1216                 }
1217         }
1218 }