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