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Fix rendering of workspace names after "reload" (Thanks fallen)
[i3/i3] / src / commands.c
1 /*
2  * vim:ts=8:expandtab
3  *
4  * i3 - an improved dynamic tiling window manager
5  *
6  * © 2009-2010 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 "randr.h"
26 #include "client.h"
27 #include "floating.h"
28 #include "xcb.h"
29 #include "config.h"
30 #include "workspace.h"
31 #include "commands.h"
32 #include "resize.h"
33 #include "log.h"
34 #include "sighandler.h"
35 #include "manage.h"
36 #include "ipc.h"
37
38 bool focus_window_in_container(xcb_connection_t *conn, Container *container, direction_t direction) {
39         /* If this container is empty, we’re done */
40         if (container->currently_focused == NULL)
41                 return false;
42
43         /* Get the previous/next client or wrap around */
44         Client *candidate = NULL;
45         if (direction == D_UP) {
46                 if ((candidate = CIRCLEQ_PREV_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
47                         candidate = CIRCLEQ_LAST(&(container->clients));
48         }
49         else if (direction == D_DOWN) {
50                 if ((candidate = CIRCLEQ_NEXT_OR_NULL(&(container->clients), container->currently_focused, clients)) == NULL)
51                         candidate = CIRCLEQ_FIRST(&(container->clients));
52         } else ELOG("Direction not implemented!\n");
53
54         /* If we could not switch, the container contains exactly one client. We return false */
55         if (candidate == container->currently_focused)
56                 return false;
57
58         /* Set focus */
59         set_focus(conn, candidate, true);
60
61         return true;
62 }
63
64 typedef enum { THING_WINDOW, THING_CONTAINER, THING_SCREEN } thing_t;
65
66 static void jump_to_mark(xcb_connection_t *conn, const char *mark) {
67         Client *current;
68         LOG("Jumping to \"%s\"\n", mark);
69
70         Workspace *ws;
71         TAILQ_FOREACH(ws, workspaces, workspaces)
72                 SLIST_FOREACH(current, &(ws->focus_stack), focus_clients) {
73                         if (current->mark == NULL || strcmp(current->mark, mark) != 0)
74                                 continue;
75
76                         workspace_show(conn, current->workspace->num + 1);
77                         set_focus(conn, current, true);
78                         return;
79                 }
80
81         ELOG("No window with this mark found\n");
82 }
83
84 static void focus_thing(xcb_connection_t *conn, direction_t direction, thing_t thing) {
85         DLOG("focusing direction %d\n", direction);
86
87         int new_row = current_row,
88             new_col = current_col;
89         Container *container = CUR_CELL;
90         Workspace *t_ws = c_ws;
91
92         /* Makes sure new_col and new_row are within bounds of the new workspace */
93 #define CHECK_COLROW_BOUNDARIES \
94         do { \
95                 if (new_col >= t_ws->cols) \
96                         new_col = (t_ws->cols - 1); \
97                 if (new_row >= t_ws->rows) \
98                         new_row = (t_ws->rows - 1); \
99         } while (0)
100
101         /* There always is a container. If not, current_col or current_row is wrong */
102         assert(container != NULL);
103
104         if (container->workspace->fullscreen_client != NULL) {
105                 LOG("You're in fullscreen mode. Forcing focus to operate on whole screens\n");
106                 thing = THING_SCREEN;
107         }
108
109         /* For focusing screens, situation is different: we get the rect
110          * of the current screen, then get the screen which is on its
111          * right/left/bottom/top and just switch to the workspace on
112          * the target screen. */
113         if (thing == THING_SCREEN) {
114                 Output *cs = c_ws->output;
115                 assert(cs != NULL);
116                 Rect bounds = cs->rect;
117
118                 if (direction == D_RIGHT)
119                         bounds.x += bounds.width;
120                 else if (direction == D_LEFT)
121                         bounds.x -= bounds.width;
122                 else if (direction == D_UP)
123                         bounds.y -= bounds.height;
124                 else bounds.y += bounds.height;
125
126                 Output *target = get_output_containing(bounds.x, bounds.y);
127                 if (target == NULL) {
128                         DLOG("Target output NULL\n");
129                         /* Wrap around if the target screen is out of bounds */
130                         if (direction == D_RIGHT)
131                                 target = get_output_most(D_LEFT, cs);
132                         else if (direction == D_LEFT)
133                                 target = get_output_most(D_RIGHT, cs);
134                         else if (direction == D_UP)
135                                 target = get_output_most(D_DOWN, cs);
136                         else target = get_output_most(D_UP, cs);
137                 }
138
139                 DLOG("Switching to ws %d\n", target->current_workspace + 1);
140                 workspace_show(conn, target->current_workspace->num + 1);
141                 return;
142         }
143
144         /* TODO: for horizontal default layout, this has to be expanded to LEFT/RIGHT */
145         if (direction == D_UP || direction == D_DOWN) {
146                 if (thing == THING_WINDOW)
147                         /* Let’s see if we can perform up/down focus in the current container */
148                         if (focus_window_in_container(conn, container, direction))
149                                 return;
150
151                 if (direction == D_DOWN && cell_exists(t_ws, current_col, current_row+1))
152                         new_row = current_row + t_ws->table[current_col][current_row]->rowspan;
153                 else if (direction == D_UP && cell_exists(c_ws, current_col, current_row-1)) {
154                         /* Set new_row as a sane default, but it may get overwritten in a second */
155                         new_row--;
156
157                         /* Search from the top to correctly handle rowspanned containers */
158                         for (int rows = 0; rows < current_row; rows += t_ws->table[current_col][rows]->rowspan) {
159                                 if (new_row > (rows + (t_ws->table[current_col][rows]->rowspan - 1)))
160                                         continue;
161
162                                 new_row = rows;
163                                 break;
164                         }
165                 } else {
166                         /* Let’s see if there is a screen down/up there to which we can switch */
167                         DLOG("container is at %d with height %d\n", container->y, container->height);
168                         Output *output;
169                         int destination_y = (direction == D_UP ? (container->y - 1) : (container->y + container->height + 1));
170                         if ((output = get_output_containing(container->x, destination_y)) == NULL) {
171                                 DLOG("Wrapping screen around vertically\n");
172                                 /* No screen found? Then wrap */
173                                 output = get_output_most((direction == D_UP ? D_DOWN : D_UP), container->workspace->output);
174                         }
175                         t_ws = output->current_workspace;
176                         new_row = (direction == D_UP ? (t_ws->rows - 1) : 0);
177                 }
178
179                 CHECK_COLROW_BOUNDARIES;
180
181                 DLOG("new_col = %d, new_row = %d\n", new_col, new_row);
182                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
183                         DLOG("Cell empty, checking for colspanned client above...\n");
184                         for (int cols = 0; cols < new_col; cols += t_ws->table[cols][new_row]->colspan) {
185                                 if (new_col > (cols + (t_ws->table[cols][new_row]->colspan - 1)))
186                                         continue;
187
188                                 new_col = cols;
189                                 DLOG("Fixed it to new col %d\n", new_col);
190                                 break;
191                         }
192                 }
193
194                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
195                         DLOG("Cell still empty, checking for full cols above spanned width...\n");
196                         DLOG("new_col = %d\n", new_col);
197                         DLOG("colspan = %d\n", container->colspan);
198                         for (int cols = new_col;
199                              cols < container->col + container->colspan;
200                              cols += t_ws->table[cols][new_row]->colspan) {
201                                 DLOG("candidate: new_row = %d, cols = %d\n", new_row, cols);
202                                 if (t_ws->table[cols][new_row]->currently_focused == NULL)
203                                         continue;
204
205                                 new_col = cols;
206                                 DLOG("Fixed it to new col %d\n", new_col);
207                                 break;
208                         }
209                 }
210         } else if (direction == D_LEFT || direction == D_RIGHT) {
211                 if (direction == D_RIGHT && cell_exists(t_ws, current_col+1, current_row))
212                         new_col = current_col + t_ws->table[current_col][current_row]->colspan;
213                 else if (direction == D_LEFT && cell_exists(t_ws, current_col-1, current_row)) {
214                         /* Set new_col as a sane default, but it may get overwritten in a second */
215                         new_col--;
216
217                         /* Search from the left to correctly handle colspanned containers */
218                         for (int cols = 0; cols < current_col; cols += t_ws->table[cols][current_row]->colspan) {
219                                 if (new_col > (cols + (t_ws->table[cols][current_row]->colspan - 1)))
220                                         continue;
221
222                                 new_col = cols;
223                                 break;
224                         }
225                 } else {
226                         /* Let’s see if there is a screen left/right here to which we can switch */
227                         DLOG("container is at %d with width %d\n", container->x, container->width);
228                         Output *output;
229                         int destination_x = (direction == D_LEFT ? (container->x - 1) : (container->x + container->width + 1));
230                         if ((output = get_output_containing(destination_x, container->y)) == NULL) {
231                                 DLOG("Wrapping screen around horizontally\n");
232                                 output = get_output_most((direction == D_LEFT ? D_RIGHT : D_LEFT), container->workspace->output);
233                         }
234                         t_ws = output->current_workspace;
235                         new_col = (direction == D_LEFT ? (t_ws->cols - 1) : 0);
236                 }
237
238                 CHECK_COLROW_BOUNDARIES;
239
240                 DLOG("new_col = %d, new_row = %d\n", new_col, new_row);
241                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
242                         DLOG("Cell empty, checking for rowspanned client above...\n");
243                         for (int rows = 0; rows < new_row; rows += t_ws->table[new_col][rows]->rowspan) {
244                                 if (new_row > (rows + (t_ws->table[new_col][rows]->rowspan - 1)))
245                                         continue;
246
247                                 new_row = rows;
248                                 DLOG("Fixed it to new row %d\n", new_row);
249                                 break;
250                         }
251                 }
252
253                 if (t_ws->table[new_col][new_row]->currently_focused == NULL) {
254                         DLOG("Cell still empty, checking for full cols near full spanned height...\n");
255                         DLOG("new_row = %d\n", new_row);
256                         DLOG("rowspan = %d\n", container->rowspan);
257                         for (int rows = new_row;
258                              rows < container->row + container->rowspan;
259                              rows += t_ws->table[new_col][rows]->rowspan) {
260                                 DLOG("candidate: new_col = %d, rows = %d\n", new_col, rows);
261                                 if (t_ws->table[new_col][rows]->currently_focused == NULL)
262                                         continue;
263
264                                 new_row = rows;
265                                 DLOG("Fixed it to new col %d\n", new_row);
266                                 break;
267                         }
268                 }
269
270         } else {
271                 ELOG("direction unhandled\n");
272                 return;
273         }
274
275         CHECK_COLROW_BOUNDARIES;
276
277         if (t_ws->table[new_col][new_row]->currently_focused != NULL)
278                 set_focus(conn, t_ws->table[new_col][new_row]->currently_focused, true);
279 }
280
281 /*
282  * Tries to move the window inside its current container.
283  *
284  * Returns true if the window could be moved, false otherwise.
285  *
286  */
287 static bool move_current_window_in_container(xcb_connection_t *conn, Client *client,
288                 direction_t direction) {
289         assert(client->container != NULL);
290
291         Client *other = (direction == D_UP ? CIRCLEQ_PREV(client, clients) :
292                                              CIRCLEQ_NEXT(client, clients));
293
294         if (other == CIRCLEQ_END(&(client->container->clients)))
295                 return false;
296
297         DLOG("i can do that\n");
298         /* We can move the client inside its current container */
299         CIRCLEQ_REMOVE(&(client->container->clients), client, clients);
300         if (direction == D_UP)
301                 CIRCLEQ_INSERT_BEFORE(&(client->container->clients), other, client, clients);
302         else CIRCLEQ_INSERT_AFTER(&(client->container->clients), other, client, clients);
303         render_layout(conn);
304         return true;
305 }
306
307 /*
308  * Moves the current window or whole container to the given direction, creating a column/row if
309  * necessary.
310  *
311  */
312 static void move_current_window(xcb_connection_t *conn, direction_t direction) {
313         LOG("moving window to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
314                                             (direction == D_LEFT ? "left" : "right"))));
315         /* Get current window */
316         Container *container = CUR_CELL,
317                   *new = NULL;
318
319         /* There has to be a container, see focus_window() */
320         assert(container != NULL);
321
322         /* If there is no window or the dock window is focused, we’re done */
323         if (container->currently_focused == NULL ||
324             container->currently_focused->dock)
325                 return;
326
327         /* As soon as the client is moved away, the last focused client in the old
328          * container needs to get focus, if any. Therefore, we save it here. */
329         Client *current_client = container->currently_focused;
330         Client *to_focus = get_last_focused_client(conn, container, current_client);
331
332         if (to_focus == NULL) {
333                 to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
334                 if (to_focus == NULL)
335                         to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
336         }
337
338         switch (direction) {
339                 case D_LEFT:
340                         /* If we’re at the left-most position, move the rest of the table right */
341                         if (current_col == 0) {
342                                 expand_table_cols_at_head(c_ws);
343                                 new = CUR_CELL;
344                         } else
345                                 new = CUR_TABLE[--current_col][current_row];
346                         break;
347                 case D_RIGHT:
348                         if (current_col == (c_ws->cols-1))
349                                 expand_table_cols(c_ws);
350
351                         new = CUR_TABLE[++current_col][current_row];
352                         break;
353                 case D_UP:
354                         if (move_current_window_in_container(conn, current_client, D_UP))
355                                 return;
356
357                         /* if we’re at the up-most position, move the rest of the table down */
358                         if (current_row == 0) {
359                                 expand_table_rows_at_head(c_ws);
360                                 new = CUR_CELL;
361                         } else
362                                 new = CUR_TABLE[current_col][--current_row];
363                         break;
364                 case D_DOWN:
365                         if (move_current_window_in_container(conn, current_client, D_DOWN))
366                                 return;
367
368                         if (current_row == (c_ws->rows-1))
369                                 expand_table_rows(c_ws);
370
371                         new = CUR_TABLE[current_col][++current_row];
372                         break;
373                 /* To make static analyzers happy: */
374                 default:
375                         return;
376         }
377
378         /* Remove it from the old container and put it into the new one */
379         client_remove_from_container(conn, current_client, container, true);
380
381         if (new->currently_focused != NULL)
382                 CIRCLEQ_INSERT_AFTER(&(new->clients), new->currently_focused, current_client, clients);
383         else CIRCLEQ_INSERT_TAIL(&(new->clients), current_client, clients);
384         SLIST_INSERT_HEAD(&(new->workspace->focus_stack), current_client, focus_clients);
385
386         /* Update data structures */
387         current_client->container = new;
388         current_client->workspace = new->workspace;
389         container->currently_focused = to_focus;
390         new->currently_focused = current_client;
391
392         Workspace *workspace = container->workspace;
393
394         /* delete all empty columns/rows */
395         cleanup_table(conn, workspace);
396
397         /* Fix colspan/rowspan if it’d overlap */
398         fix_colrowspan(conn, workspace);
399
400         render_workspace(conn, workspace->output, workspace);
401         xcb_flush(conn);
402
403         set_focus(conn, current_client, true);
404 }
405
406 static void move_current_container(xcb_connection_t *conn, direction_t direction) {
407         LOG("moving container to direction %s\n", (direction == D_UP ? "up" : (direction == D_DOWN ? "down" :
408                                             (direction == D_LEFT ? "left" : "right"))));
409         /* Get current window */
410         Container *container = CUR_CELL,
411                   *new = NULL;
412
413         Container **old = &CUR_CELL;
414
415         /* There has to be a container, see focus_window() */
416         assert(container != NULL);
417
418         switch (direction) {
419                 case D_LEFT:
420                         /* If we’re at the left-most position, move the rest of the table right */
421                         if (current_col == 0) {
422                                 expand_table_cols_at_head(c_ws);
423                                 new = CUR_CELL;
424                                 old = &CUR_TABLE[current_col+1][current_row];
425                         } else
426                                 new = CUR_TABLE[--current_col][current_row];
427                         break;
428                 case D_RIGHT:
429                         if (current_col == (c_ws->cols-1))
430                                 expand_table_cols(c_ws);
431
432                         new = CUR_TABLE[++current_col][current_row];
433                         break;
434                 case D_UP:
435                         /* if we’re at the up-most position, move the rest of the table down */
436                         if (current_row == 0) {
437                                 expand_table_rows_at_head(c_ws);
438                                 new = CUR_CELL;
439                                 old = &CUR_TABLE[current_col][current_row+1];
440                         } else
441                                 new = CUR_TABLE[current_col][--current_row];
442                         break;
443                 case D_DOWN:
444                         if (current_row == (c_ws->rows-1))
445                                 expand_table_rows(c_ws);
446
447                         new = CUR_TABLE[current_col][++current_row];
448                         break;
449                 /* To make static analyzers happy: */
450                 default:
451                         return;
452         }
453
454         DLOG("old = %d,%d and new = %d,%d\n", container->col, container->row, new->col, new->row);
455
456         /* Swap the containers */
457         int col = new->col;
458         int row = new->row;
459
460         *old = new;
461         new->col = container->col;
462         new->row = container->row;
463
464         CUR_CELL = container;
465         container->col = col;
466         container->row = row;
467
468         Workspace *workspace = container->workspace;
469
470         /* delete all empty columns/rows */
471         cleanup_table(conn, workspace);
472
473         /* Fix colspan/rowspan if it’d overlap */
474         fix_colrowspan(conn, workspace);
475
476         render_layout(conn);
477 }
478
479 /*
480  * "Snaps" the current container (not possible for windows, because it works at table base)
481  * to the given direction, that is, adjusts cellspan/rowspan
482  *
483  */
484 static void snap_current_container(xcb_connection_t *conn, direction_t direction) {
485         LOG("snapping container to direction %d\n", direction);
486
487         Container *container = CUR_CELL;
488
489         assert(container != NULL);
490
491         switch (direction) {
492                 case D_LEFT:
493                         /* Snap to the left is actually a move to the left and then a snap right */
494                         if (!cell_exists(container->workspace, container->col - 1, container->row) ||
495                             CUR_TABLE[container->col-1][container->row]->currently_focused != NULL) {
496                                 ELOG("cannot snap to left - the cell is already used\n");
497                                 return;
498                         }
499
500                         move_current_window(conn, D_LEFT);
501                         snap_current_container(conn, D_RIGHT);
502                         return;
503                 case D_RIGHT: {
504                         /* Check if the cell is used */
505                         int new_col = container->col + container->colspan;
506                         for (int i = 0; i < container->rowspan; i++)
507                                 if (!cell_exists(container->workspace, new_col, container->row + i) ||
508                                     CUR_TABLE[new_col][container->row + i]->currently_focused != NULL) {
509                                         ELOG("cannot snap to right - the cell is already used\n");
510                                         return;
511                                 }
512
513                         /* Check if there are other cells with rowspan, which are in our way.
514                          * If so, reduce their rowspan. */
515                         for (int i = container->row-1; i >= 0; i--) {
516                                 DLOG("we got cell %d, %d with rowspan %d\n",
517                                                 new_col, i, CUR_TABLE[new_col][i]->rowspan);
518                                 while ((CUR_TABLE[new_col][i]->rowspan-1) >= (container->row - i))
519                                         CUR_TABLE[new_col][i]->rowspan--;
520                                 DLOG("new rowspan = %d\n", CUR_TABLE[new_col][i]->rowspan);
521                         }
522
523                         container->colspan++;
524                         break;
525                 }
526                 case D_UP:
527                         if (!cell_exists(container->workspace, container->col, container->row - 1) ||
528                             CUR_TABLE[container->col][container->row-1]->currently_focused != NULL) {
529                                 ELOG("cannot snap to top - the cell is already used\n");
530                                 return;
531                         }
532
533                         move_current_window(conn, D_UP);
534                         snap_current_container(conn, D_DOWN);
535                         return;
536                 case D_DOWN: {
537                         DLOG("snapping down\n");
538                         int new_row = container->row + container->rowspan;
539                         for (int i = 0; i < container->colspan; i++)
540                                 if (!cell_exists(container->workspace, container->col + i, new_row) ||
541                                     CUR_TABLE[container->col + i][new_row]->currently_focused != NULL) {
542                                         ELOG("cannot snap down - the cell is already used\n");
543                                         return;
544                                 }
545
546                         for (int i = container->col-1; i >= 0; i--) {
547                                 DLOG("we got cell %d, %d with colspan %d\n",
548                                                 i, new_row, CUR_TABLE[i][new_row]->colspan);
549                                 while ((CUR_TABLE[i][new_row]->colspan-1) >= (container->col - i))
550                                         CUR_TABLE[i][new_row]->colspan--;
551                                 DLOG("new colspan = %d\n", CUR_TABLE[i][new_row]->colspan);
552
553                         }
554
555                         container->rowspan++;
556                         break;
557                 }
558                 /* To make static analyzers happy: */
559                 default:
560                         return;
561         }
562
563         render_layout(conn);
564 }
565
566 static void move_floating_window_to_workspace(xcb_connection_t *conn, Client *client, int workspace) {
567         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
568         Workspace *t_ws = workspace_get(workspace-1),
569                   *old_ws = client->workspace;
570
571         LOG("moving floating\n");
572
573         workspace_initialize(t_ws, c_ws->output, false);
574
575         /* Check if there is already a fullscreen client on the destination workspace and
576          * stop moving if so. */
577         if (client->fullscreen && (t_ws->fullscreen_client != NULL)) {
578                 ELOG("Not moving: Fullscreen client already existing on destination workspace.\n");
579                 return;
580         }
581
582         floating_assign_to_workspace(client, t_ws);
583
584         /* If we’re moving it to an invisible screen, we need to unmap it */
585         if (!workspace_is_visible(t_ws)) {
586                 DLOG("This workspace is not visible, unmapping\n");
587                 client_unmap(conn, client);
588         } else {
589                 /* If this is not the case, we move the window to a workspace
590                  * which is on another screen, so we also need to adjust its
591                  * coordinates. */
592                 DLOG("before x = %d, y = %d\n", client->rect.x, client->rect.y);
593                 uint32_t relative_x = client->rect.x - old_ws->rect.x,
594                          relative_y = client->rect.y - old_ws->rect.y;
595                 DLOG("rel_x = %d, rel_y = %d\n", relative_x, relative_y);
596                 client->rect.x = t_ws->rect.x + relative_x;
597                 client->rect.y = t_ws->rect.y + relative_y;
598                 DLOG("after x = %d, y = %d\n", client->rect.x, client->rect.y);
599                 reposition_client(conn, client);
600                 xcb_flush(conn);
601         }
602
603         /* Configure the window above all tiling windows (or below a fullscreen
604          * window, if any) */
605         if (t_ws->fullscreen_client != NULL) {
606                 uint32_t values[] = { t_ws->fullscreen_client->frame, XCB_STACK_MODE_BELOW };
607                 xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_SIBLING | XCB_CONFIG_WINDOW_STACK_MODE, values);
608         } else {
609                 Client *last_tiling;
610                 SLIST_FOREACH(last_tiling, &(t_ws->focus_stack), focus_clients)
611                         if (!client_is_floating(last_tiling))
612                                 break;
613                 if (last_tiling != SLIST_END(&(t_ws->focus_stack))) {
614                         uint32_t values[] = { last_tiling->frame, XCB_STACK_MODE_ABOVE };
615                         xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_SIBLING | XCB_CONFIG_WINDOW_STACK_MODE, values);
616                 }
617         }
618
619         DLOG("done\n");
620
621         render_layout(conn);
622
623         if (workspace_is_visible(t_ws)) {
624                 client_warp_pointer_into(conn, client);
625                 set_focus(conn, client, true);
626         }
627 }
628
629 /*
630  * Moves the currently selected window to the given workspace
631  *
632  */
633 static void move_current_window_to_workspace(xcb_connection_t *conn, int workspace) {
634         LOG("Moving current window to workspace %d\n", workspace);
635
636         Container *container = CUR_CELL;
637
638         assert(container != NULL);
639
640         /* t_ws (to workspace) is just a container pointer to the workspace we’re switching to */
641         Workspace *t_ws = workspace_get(workspace-1);
642
643         Client *current_client = container->currently_focused;
644         if (current_client == NULL) {
645                 ELOG("No currently focused client in current container.\n");
646                 return;
647         }
648         Client *to_focus = CIRCLEQ_NEXT_OR_NULL(&(container->clients), current_client, clients);
649         if (to_focus == NULL)
650                 to_focus = CIRCLEQ_PREV_OR_NULL(&(container->clients), current_client, clients);
651
652         workspace_initialize(t_ws, container->workspace->output, false);
653         /* Check if there is already a fullscreen client on the destination workspace and
654          * stop moving if so. */
655         if (current_client->fullscreen && (t_ws->fullscreen_client != NULL)) {
656                 ELOG("Not moving: Fullscreen client already existing on destination workspace.\n");
657                 return;
658         }
659
660         Container *to_container = t_ws->table[t_ws->current_col][t_ws->current_row];
661
662         assert(to_container != NULL);
663
664         client_remove_from_container(conn, current_client, container, true);
665         if (container->workspace->fullscreen_client == current_client)
666                 container->workspace->fullscreen_client = NULL;
667
668         /* TODO: insert it to the correct position */
669         CIRCLEQ_INSERT_TAIL(&(to_container->clients), current_client, clients);
670
671         SLIST_INSERT_HEAD(&(to_container->workspace->focus_stack), current_client, focus_clients);
672         DLOG("Moved.\n");
673
674         current_client->container = to_container;
675         current_client->workspace = to_container->workspace;
676         container->currently_focused = to_focus;
677         to_container->currently_focused = current_client;
678
679         /* If we’re moving it to an invisible screen, we need to unmap it */
680         if (!workspace_is_visible(to_container->workspace)) {
681                 DLOG("This workspace is not visible, unmapping\n");
682                 client_unmap(conn, current_client);
683         } else {
684                 if (current_client->fullscreen) {
685                         DLOG("Calling client_enter_fullscreen again\n");
686                         client_enter_fullscreen(conn, current_client, false);
687                 }
688         }
689
690         /* delete all empty columns/rows */
691         cleanup_table(conn, container->workspace);
692
693         render_layout(conn);
694
695         if (workspace_is_visible(to_container->workspace)) {
696                 client_warp_pointer_into(conn, current_client);
697                 set_focus(conn, current_client, true);
698         }
699 }
700
701 /*
702  * Jumps to the given window class / title.
703  * Title is matched using strstr, that is, matches if it appears anywhere
704  * in the string. Regular expressions seem to be a bit overkill here. However,
705  * if we need them for something else somewhen, we may introduce them here, too.
706  *
707  */
708 static void jump_to_window(xcb_connection_t *conn, const char *arguments) {
709         char *classtitle;
710         Client *client;
711
712         /* The first character is a quote, this was checked before */
713         classtitle = sstrdup(arguments+1);
714         /* The last character is a quote, we just set it to NULL */
715         classtitle[strlen(classtitle)-1] = '\0';
716
717         if ((client = get_matching_client(conn, classtitle, NULL)) == NULL) {
718                 free(classtitle);
719                 ELOG("No matching client found.\n");
720                 return;
721         }
722
723         free(classtitle);
724         workspace_show(conn, client->workspace->num + 1);
725         set_focus(conn, client, true);
726 }
727
728 /*
729  * Jump directly to the specified workspace, row and col.
730  * Great for reaching windows that you always keep in the same spot (hello irssi, I'm looking at you)
731  *
732  */
733 static void jump_to_container(xcb_connection_t *conn, const char *arguments) {
734         int ws, row, col;
735         int result;
736
737         result = sscanf(arguments, "%d %d %d", &ws, &col, &row);
738         LOG("Jump called with %d parameters (\"%s\")\n", result, arguments);
739
740         /* No match? Either no arguments were specified, or no numbers */
741         if (result < 1) {
742                 ELOG("At least one valid argument required\n");
743                 return;
744         }
745
746         /* Move to the target workspace */
747         workspace_show(conn, ws);
748
749         if (result < 3)
750                 return;
751
752         DLOG("Boundary-checking col %d, row %d... (max cols %d, max rows %d)\n", col, row, c_ws->cols, c_ws->rows);
753
754         /* Move to row/col */
755         if (row >= c_ws->rows)
756                 row = c_ws->rows - 1;
757         if (col >= c_ws->cols)
758                 col = c_ws->cols - 1;
759
760         DLOG("Jumping to col %d, row %d\n", col, row);
761         if (c_ws->table[col][row]->currently_focused != NULL)
762                 set_focus(conn, c_ws->table[col][row]->currently_focused, true);
763 }
764
765 /*
766  * Travels the focus stack by the given number of times (or once, if no argument
767  * was specified). That is, selects the window you were in before you focused
768  * the current window.
769  *
770  * The special values 'floating' (select the next floating window), 'tiling'
771  * (select the next tiling window), 'ft' (if the current window is floating,
772  * select the next tiling window and vice-versa) are also valid
773  *
774  */
775 static void travel_focus_stack(xcb_connection_t *conn, const char *arguments) {
776         /* Start count at -1 to always skip the first element */
777         int times, count = -1;
778         Client *current;
779         bool floating_criteria;
780
781         /* Either it’s one of the special values… */
782         if (strcasecmp(arguments, "floating") == 0) {
783                 floating_criteria = true;
784         } else if (strcasecmp(arguments, "tiling") == 0) {
785                 floating_criteria = false;
786         } else if (strcasecmp(arguments, "ft") == 0) {
787                 Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
788                 if (last_focused == SLIST_END(&(c_ws->focus_stack))) {
789                         ELOG("Cannot select the next floating/tiling client because there is no client at all\n");
790                         return;
791                 }
792
793                 floating_criteria = !client_is_floating(last_focused);
794         } else {
795                 /* …or a number was specified */
796                 if (sscanf(arguments, "%u", &times) != 1) {
797                         ELOG("No or invalid argument given (\"%s\"), using default of 1 times\n", arguments);
798                         times = 1;
799                 }
800
801                 SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients) {
802                         if (++count < times) {
803                                 DLOG("Skipping\n");
804                                 continue;
805                         }
806
807                         DLOG("Focussing\n");
808                         set_focus(conn, current, true);
809                         break;
810                 }
811                 return;
812         }
813
814         /* Select the next client matching the criteria parsed above */
815         SLIST_FOREACH(current, &(CUR_CELL->workspace->focus_stack), focus_clients)
816                 if (client_is_floating(current) == floating_criteria) {
817                         set_focus(conn, current, true);
818                         break;
819                 }
820 }
821
822 /* 
823  * Switch to next or previous existing workspace
824  *
825  */
826 static void next_previous_workspace(xcb_connection_t *conn, int direction) {
827         Workspace *ws = c_ws;
828
829         if (direction == 'n') {
830                 while (1) {
831                         ws = TAILQ_NEXT(ws, workspaces);
832
833                         if (ws == TAILQ_END(workspaces))
834                                 ws = TAILQ_FIRST(workspaces);
835
836                         if (ws == c_ws)
837                                 return;
838
839                         if (ws->output == NULL)
840                                 continue;
841
842                         workspace_show(conn, ws->num + 1);
843                         return;
844                 }
845         } else if (direction == 'p') {
846                 while (1) {
847                         ws = TAILQ_PREV(ws, workspaces_head, workspaces);
848
849                         if (ws == TAILQ_END(workspaces))
850                                 ws = TAILQ_LAST(workspaces, workspaces_head);
851
852                         if (ws == c_ws)
853                                 return;
854
855                         if (ws->output == NULL)
856                                 continue;
857
858                         workspace_show(conn, ws->num + 1);
859                         return;
860                 }
861         }
862 }
863
864 static void parse_resize_command(xcb_connection_t *conn, Client *last_focused, const char *command) {
865         int first, second;
866         resize_orientation_t orientation = O_VERTICAL;
867         Container *con = last_focused->container;
868         Workspace *ws = last_focused->workspace;
869
870         if (client_is_floating(last_focused)) {
871                 DLOG("Resizing a floating client\n");
872                 if (STARTS_WITH(command, "left")) {
873                         command += strlen("left");
874                         last_focused->rect.width += atoi(command);
875                         last_focused->rect.x -= atoi(command);
876                 } else if (STARTS_WITH(command, "right")) {
877                         command += strlen("right");
878                         last_focused->rect.width += atoi(command);
879                 } else if (STARTS_WITH(command, "top")) {
880                         command += strlen("top");
881                         last_focused->rect.height += atoi(command);
882                         last_focused->rect.y -= atoi(command);
883                 } else if (STARTS_WITH(command, "bottom")) {
884                         command += strlen("bottom");
885                         last_focused->rect.height += atoi(command);
886                 } else {
887                         ELOG("Syntax: resize <left|right|top|bottom> [+|-]<pixels>\n");
888                         return;
889                 }
890
891                 /* resize_client flushes */
892                 resize_client(conn, last_focused);
893
894                 return;
895         }
896
897         if (STARTS_WITH(command, "left")) {
898                 if (con->col == 0)
899                         return;
900                 first = con->col - 1;
901                 second = con->col;
902                 command += strlen("left");
903         } else if (STARTS_WITH(command, "right")) {
904                 first = con->col + (con->colspan - 1);
905                 DLOG("column %d\n", first);
906
907                 if (!cell_exists(ws, first, con->row) ||
908                     (first == (ws->cols-1)))
909                         return;
910
911                 second = first + 1;
912                 command += strlen("right");
913         } else if (STARTS_WITH(command, "top")) {
914                 if (con->row == 0)
915                         return;
916                 first = con->row - 1;
917                 second = con->row;
918                 orientation = O_HORIZONTAL;
919                 command += strlen("top");
920         } else if (STARTS_WITH(command, "bottom")) {
921                 first = con->row + (con->rowspan - 1);
922                 if (!cell_exists(ws, con->col, first) ||
923                     (first == (ws->rows-1)))
924                         return;
925
926                 second = first + 1;
927                 orientation = O_HORIZONTAL;
928                 command += strlen("bottom");
929         } else {
930                 ELOG("Syntax: resize <left|right|top|bottom> [+|-]<pixels>\n");
931                 return;
932         }
933
934         int pixels = atoi(command);
935         if (pixels == 0)
936                 return;
937
938         resize_container(conn, ws, first, second, orientation, pixels);
939 }
940
941 /*
942  * Parses a command, see file CMDMODE for more information
943  *
944  */
945 void parse_command(xcb_connection_t *conn, const char *command) {
946         LOG("--- parsing command \"%s\" ---\n", command);
947         /* Get the first client from focus stack because floating clients are not
948          * in any container, therefore CUR_CELL is not appropriate. */
949         Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
950         if (last_focused == SLIST_END(&(c_ws->focus_stack)))
951                 last_focused = NULL;
952
953         /* Hmm, just to be sure */
954         if (command[0] == '\0')
955                 return;
956
957         /* Is it an <exec>? Then execute the given command. */
958         if (STARTS_WITH(command, "exec ")) {
959                 LOG("starting \"%s\"\n", command + strlen("exec "));
960                 start_application(command+strlen("exec "));
961                 return;
962         }
963
964         if (STARTS_WITH(command, "mark")) {
965                 if (last_focused == NULL) {
966                         ELOG("There is no window to mark\n");
967                         return;
968                 }
969                 const char *rest = command + strlen("mark");
970                 while (*rest == ' ')
971                         rest++;
972                 if (*rest == '\0') {
973                         DLOG("interactive mark starting\n");
974                         start_application("i3-input -p 'mark ' -l 1 -P 'Mark: '");
975                 } else {
976                         LOG("mark with \"%s\"\n", rest);
977                         client_mark(conn, last_focused, rest);
978                 }
979                 return;
980         }
981
982         if (STARTS_WITH(command, "goto")) {
983                 const char *rest = command + strlen("goto");
984                 while (*rest == ' ')
985                         rest++;
986                 if (*rest == '\0') {
987                         DLOG("interactive go to mark starting\n");
988                         start_application("i3-input -p 'goto ' -l 1 -P 'Goto: '");
989                 } else {
990                         LOG("go to \"%s\"\n", rest);
991                         jump_to_mark(conn, rest);
992                 }
993                 return;
994         }
995
996         if (STARTS_WITH(command, "stack-limit ")) {
997                 if (last_focused == NULL || client_is_floating(last_focused)) {
998                         ELOG("No container focused\n");
999                         return;
1000                 }
1001                 const char *rest = command + strlen("stack-limit ");
1002                 if (strncmp(rest, "rows ", strlen("rows ")) == 0) {
1003                         last_focused->container->stack_limit = STACK_LIMIT_ROWS;
1004                         rest += strlen("rows ");
1005                 } else if (strncmp(rest, "cols ", strlen("cols ")) == 0) {
1006                         last_focused->container->stack_limit = STACK_LIMIT_COLS;
1007                         rest += strlen("cols ");
1008                 } else {
1009                         ELOG("Syntax: stack-limit <cols|rows> <limit>\n");
1010                         return;
1011                 }
1012
1013                 last_focused->container->stack_limit_value = atoi(rest);
1014                 if (last_focused->container->stack_limit_value == 0)
1015                         last_focused->container->stack_limit = STACK_LIMIT_NONE;
1016
1017                 return;
1018         }
1019
1020         if (STARTS_WITH(command, "resize ")) {
1021                 if (last_focused == NULL)
1022                         return;
1023                 const char *rest = command + strlen("resize ");
1024                 parse_resize_command(conn, last_focused, rest);
1025                 return;
1026         }
1027
1028         if (STARTS_WITH(command, "mode ")) {
1029                 const char *rest = command + strlen("mode ");
1030                 switch_mode(conn, rest);
1031                 return;
1032         }
1033
1034         /* Is it an <exit>? */
1035         if (STARTS_WITH(command, "exit")) {
1036                 LOG("User issued exit-command, exiting without error.\n");
1037                 restore_geometry(global_conn);
1038                 ipc_shutdown();
1039                 exit(EXIT_SUCCESS);
1040         }
1041
1042         /* Is it a <reload>? */
1043         if (STARTS_WITH(command, "reload")) {
1044                 load_configuration(conn, NULL, true);
1045                 render_layout(conn);
1046                 /* Send an IPC event just in case the ws names have changed */
1047                 ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"reload\"}");
1048                 return;
1049         }
1050
1051         /* Is it <restart>? Then restart in place. */
1052         if (STARTS_WITH(command, "restart")) {
1053                 i3_restart();
1054         }
1055
1056         if (STARTS_WITH(command, "kill")) {
1057                 if (last_focused == NULL) {
1058                         ELOG("There is no window to kill\n");
1059                         return;
1060                 }
1061
1062                 LOG("Killing current window\n");
1063                 client_kill(conn, last_focused);
1064                 return;
1065         }
1066
1067         /* Is it a jump to a specified workspace, row, col? */
1068         if (STARTS_WITH(command, "jump ")) {
1069                 const char *arguments = command + strlen("jump ");
1070                 if (arguments[0] == '"')
1071                         jump_to_window(conn, arguments);
1072                 else jump_to_container(conn, arguments);
1073                 return;
1074         }
1075
1076         /* Should we travel the focus stack? */
1077         if (STARTS_WITH(command, "focus")) {
1078                 const char *arguments = command + strlen("focus ");
1079                 travel_focus_stack(conn, arguments);
1080                 return;
1081         }
1082
1083         /* Is it 'f' for fullscreen, or 'fg' for fullscreen_global? */
1084         if (command[0] == 'f') {
1085                 if (last_focused == NULL)
1086                         return;
1087                 if (command[1] == 'g')
1088                         client_toggle_fullscreen_global(conn, last_focused);
1089                 else
1090                         client_toggle_fullscreen(conn, last_focused);
1091                 return;
1092         }
1093
1094         /* Is it just 's' for stacking or 'd' for default? */
1095         if ((command[0] == 's' || command[0] == 'd' || command[0] == 'T') && (command[1] == '\0')) {
1096                 if (last_focused != NULL && client_is_floating(last_focused)) {
1097                         ELOG("not switching, this is a floating client\n");
1098                         return;
1099                 }
1100                 LOG("Switching mode for current container\n");
1101                 int new_mode = MODE_DEFAULT;
1102                 if (command[0] == 's' && CUR_CELL->mode != MODE_STACK)
1103                         new_mode = MODE_STACK;
1104                 if (command[0] == 'T' && CUR_CELL->mode != MODE_TABBED)
1105                         new_mode = MODE_TABBED;
1106                 switch_layout_mode(conn, CUR_CELL, new_mode);
1107                 return;
1108         }
1109
1110         /* Is it 'bn' (border normal), 'bp' (border 1pixel) or 'bb' (border borderless)? */
1111         /* or even 'bt' (toggle border: 'bp' -> 'bb' -> 'bn' ) */
1112         if (command[0] == 'b') {
1113                 if (last_focused == NULL) {
1114                         ELOG("No window focused, cannot change border type\n");
1115                         return;
1116                 }
1117
1118                 char com = command[1];
1119                 if (command[1] == 't') {
1120                         if (last_focused->titlebar_position == TITLEBAR_TOP &&
1121                             !last_focused->borderless)
1122                             com = 'p';
1123                         else if (last_focused->titlebar_position == TITLEBAR_OFF &&
1124                                  !last_focused->borderless)
1125                             com = 'b';
1126                         else com = 'n';
1127                 }
1128
1129                 client_change_border(conn, last_focused, com);
1130                 return;
1131         }
1132
1133         if (command[0] == 'H') {
1134                 LOG("Hiding all floating windows\n");
1135                 floating_toggle_hide(conn, c_ws);
1136                 return;
1137         }
1138
1139         enum { WITH_WINDOW, WITH_CONTAINER, WITH_WORKSPACE, WITH_SCREEN } with = WITH_WINDOW;
1140
1141         /* Is it a <with>? */
1142         if (command[0] == 'w') {
1143                 command++;
1144                 /* TODO: implement */
1145                 if (command[0] == 'c') {
1146                         with = WITH_CONTAINER;
1147                         command++;
1148                 } else if (command[0] == 'w') {
1149                         with = WITH_WORKSPACE;
1150                         command++;
1151                 } else if (command[0] == 's') {
1152                         with = WITH_SCREEN;
1153                         command++;
1154                 } else {
1155                         ELOG("not yet implemented.\n");
1156                         return;
1157                 }
1158         }
1159
1160         /* Is it 't' for toggle tiling/floating? */
1161         if (command[0] == 't') {
1162                 if (with == WITH_WORKSPACE) {
1163                         c_ws->auto_float = !c_ws->auto_float;
1164                         LOG("autofloat is now %d\n", c_ws->auto_float);
1165                         return;
1166                 }
1167                 if (last_focused == NULL) {
1168                         ELOG("Cannot toggle tiling/floating: workspace empty\n");
1169                         return;
1170                 }
1171
1172                 Workspace *ws = last_focused->workspace;
1173
1174                 if (last_focused->fullscreen)
1175                         client_leave_fullscreen(conn, last_focused);
1176
1177                 toggle_floating_mode(conn, last_focused, false);
1178                 /* delete all empty columns/rows */
1179                 cleanup_table(conn, ws);
1180
1181                 /* Fix colspan/rowspan if it’d overlap */
1182                 fix_colrowspan(conn, ws);
1183
1184                 render_workspace(conn, ws->output, ws);
1185
1186                 /* Re-focus the client because cleanup_table sets the focus to the last
1187                  * focused client inside a container only. */
1188                 set_focus(conn, last_focused, true);
1189
1190                 return;
1191         }
1192
1193         /* Is it 'n' or 'p' for next/previous workspace? (nw) */
1194         if ((command[0] == 'n' || command[0] == 'p') && command[1] == 'w') {
1195                next_previous_workspace(conn, command[0]);
1196                return;
1197         }
1198
1199         /* It’s a normal <cmd> */
1200         char *rest = NULL;
1201         enum { ACTION_FOCUS, ACTION_MOVE, ACTION_SNAP } action = ACTION_FOCUS;
1202         direction_t direction;
1203         int times = strtol(command, &rest, 10);
1204         if (rest == NULL) {
1205                 ELOG("Invalid command (\"%s\")\n", command);
1206                 return;
1207         }
1208
1209         if (*rest == '\0') {
1210                 /* No rest? This was a workspace number, not a times specification */
1211                 workspace_show(conn, times);
1212                 return;
1213         }
1214
1215         if (*rest == 'm' || *rest == 's') {
1216                 action = (*rest == 'm' ? ACTION_MOVE : ACTION_SNAP);
1217                 rest++;
1218         }
1219
1220         int workspace = strtol(rest, &rest, 10);
1221
1222         if (rest == NULL) {
1223                 ELOG("Invalid command (\"%s\")\n", command);
1224                 return;
1225         }
1226
1227         if (*rest == '\0') {
1228                 if (last_focused != NULL && client_is_floating(last_focused))
1229                         move_floating_window_to_workspace(conn, last_focused, workspace);
1230                 else move_current_window_to_workspace(conn, workspace);
1231                 return;
1232         }
1233
1234         if (last_focused == NULL) {
1235                 ELOG("Not performing (no window found)\n");
1236                 return;
1237         }
1238
1239         if (client_is_floating(last_focused) &&
1240             (action != ACTION_FOCUS && action != ACTION_MOVE)) {
1241                 ELOG("Not performing (floating)\n");
1242                 return;
1243         }
1244
1245         /* Now perform action to <where> */
1246         while (*rest != '\0') {
1247                 if (*rest == 'h')
1248                         direction = D_LEFT;
1249                 else if (*rest == 'j')
1250                         direction = D_DOWN;
1251                 else if (*rest == 'k')
1252                         direction = D_UP;
1253                 else if (*rest == 'l')
1254                         direction = D_RIGHT;
1255                 else {
1256                         ELOG("unknown direction: %c\n", *rest);
1257                         return;
1258                 }
1259                 rest++;
1260
1261                 if (action == ACTION_FOCUS) {
1262                         if (with == WITH_SCREEN) {
1263                                 focus_thing(conn, direction, THING_SCREEN);
1264                                 continue;
1265                         }
1266                         if (client_is_floating(last_focused)) {
1267                                 floating_focus_direction(conn, last_focused, direction);
1268                                 continue;
1269                         }
1270                         focus_thing(conn, direction, (with == WITH_WINDOW ? THING_WINDOW : THING_CONTAINER));
1271                         continue;
1272                 }
1273
1274                 if (action == ACTION_MOVE) {
1275                         if (with == WITH_SCREEN) {
1276                                 /* TODO: this should swap the screen’s contents
1277                                  * (e.g. all workspaces) with the next/previous/…
1278                                  * screen */
1279                                 ELOG("Not yet implemented\n");
1280                                 continue;
1281                         }
1282                         if (client_is_floating(last_focused)) {
1283                                 floating_move(conn, last_focused, direction);
1284                                 continue;
1285                         }
1286                         if (with == WITH_WINDOW)
1287                                 move_current_window(conn, direction);
1288                         else move_current_container(conn, direction);
1289                         continue;
1290                 }
1291
1292                 if (action == ACTION_SNAP) {
1293                         if (with == WITH_SCREEN) {
1294                                 ELOG("You cannot snap a screen (it makes no sense).\n");
1295                                 continue;
1296                         }
1297                         snap_current_container(conn, direction);
1298                         continue;
1299                 }
1300         }
1301 }