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