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