i3
randr.c
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1 #undef I3__FILE__
2 #define I3__FILE__ "randr.c"
3 /*
4  * vim:ts=4:sw=4:expandtab
5  *
6  * i3 - an improved dynamic tiling window manager
7  * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
8  *
9  * For more information on RandR, please see the X.org RandR specification at
10  * http://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt
11  * (take your time to read it completely, it answers all questions).
12  *
13  */
14 #include "all.h"
15 
16 #include <time.h>
17 #include <xcb/randr.h>
18 
19 /* While a clean namespace is usually a pretty good thing, we really need
20  * to use shorter names than the whole xcb_randr_* default names. */
21 typedef xcb_randr_get_crtc_info_reply_t crtc_info;
22 typedef xcb_randr_get_screen_resources_current_reply_t resources_reply;
23 
24 /* Pointer to the result of the query for primary output */
25 xcb_randr_get_output_primary_reply_t *primary;
26 
27 /* Stores all outputs available in your current session. */
28 struct outputs_head outputs = TAILQ_HEAD_INITIALIZER(outputs);
29 
30 static bool randr_disabled = false;
31 
32 /*
33  * Get a specific output by its internal X11 id. Used by randr_query_outputs
34  * to check if the output is new (only in the first scan) or if we are
35  * re-scanning.
36  *
37  */
38 static Output *get_output_by_id(xcb_randr_output_t id) {
39  Output *output;
40  TAILQ_FOREACH (output, &outputs, outputs)
41  if (output->id == id)
42  return output;
43 
44  return NULL;
45 }
46 
47 /*
48  * Returns the output with the given name if it is active (!) or NULL.
49  *
50  */
51 Output *get_output_by_name(const char *name) {
52  Output *output;
53  TAILQ_FOREACH (output, &outputs, outputs)
54  if (output->active &&
55  strcasecmp(output->name, name) == 0)
56  return output;
57 
58  return NULL;
59 }
60 
61 /*
62  * Returns the first output which is active.
63  *
64  */
66  Output *output;
67 
68  TAILQ_FOREACH (output, &outputs, outputs)
69  if (output->active)
70  return output;
71 
72  die("No usable outputs available.\n");
73 }
74 
75 /*
76  * Returns the active (!) output which contains the coordinates x, y or NULL
77  * if there is no output which contains these coordinates.
78  *
79  */
80 Output *get_output_containing(unsigned int x, unsigned int y) {
81  Output *output;
82  TAILQ_FOREACH (output, &outputs, outputs) {
83  if (!output->active)
84  continue;
85  DLOG("comparing x=%d y=%d with x=%d and y=%d width %d height %d\n",
86  x, y, output->rect.x, output->rect.y, output->rect.width, output->rect.height);
87  if (x >= output->rect.x && x < (output->rect.x + output->rect.width) &&
88  y >= output->rect.y && y < (output->rect.y + output->rect.height))
89  return output;
90  }
91 
92  return NULL;
93 }
94 
95 /*
96  * In contained_by_output, we check if any active output contains part of the container.
97  * We do this by checking if the output rect is intersected by the Rect.
98  * This is the 2-dimensional counterpart of get_output_containing.
99  * Since we don't actually need the outputs intersected by the given Rect (There could
100  * be many), we just return true or false for convenience.
101  *
102  */
104  Output *output;
105  int lx = rect.x, uy = rect.y;
106  int rx = rect.x + rect.width, by = rect.y + rect.height;
107  TAILQ_FOREACH (output, &outputs, outputs) {
108  if (!output->active)
109  continue;
110  DLOG("comparing x=%d y=%d with x=%d and y=%d width %d height %d\n",
111  rect.x, rect.y, output->rect.x, output->rect.y, output->rect.width, output->rect.height);
112  if (rx >= (int)output->rect.x && lx <= (int)(output->rect.x + output->rect.width) &&
113  by >= (int)output->rect.y && uy <= (int)(output->rect.y + output->rect.height))
114  return true;
115  }
116  return false;
117 }
118 
119 /*
120  * Like get_output_next with close_far == CLOSEST_OUTPUT, but wraps.
121  *
122  * For example if get_output_next(D_DOWN, x, FARTHEST_OUTPUT) = NULL, then
123  * get_output_next_wrap(D_DOWN, x) will return the topmost output.
124  *
125  * This function always returns a output: if no active outputs can be found,
126  * current itself is returned.
127  *
128  */
130  Output *best = get_output_next(direction, current, CLOSEST_OUTPUT);
131  /* If no output can be found, wrap */
132  if (!best) {
133  direction_t opposite;
134  if (direction == D_RIGHT)
135  opposite = D_LEFT;
136  else if (direction == D_LEFT)
137  opposite = D_RIGHT;
138  else if (direction == D_DOWN)
139  opposite = D_UP;
140  else
141  opposite = D_DOWN;
142  best = get_output_next(opposite, current, FARTHEST_OUTPUT);
143  }
144  if (!best)
145  best = current;
146  DLOG("current = %s, best = %s\n", current->name, best->name);
147  return best;
148 }
149 
150 /*
151  * Gets the output which is the next one in the given direction.
152  *
153  * If close_far == CLOSEST_OUTPUT, then the output next to the current one will
154  * selected. If close_far == FARTHEST_OUTPUT, the output which is the last one
155  * in the given direction will be selected.
156  *
157  * NULL will be returned when no active outputs are present in the direction
158  * specified (note that “current” counts as such an output).
159  *
160  */
161 Output *get_output_next(direction_t direction, Output *current, output_close_far_t close_far) {
162  Rect *cur = &(current->rect),
163  *other;
164  Output *output,
165  *best = NULL;
166  TAILQ_FOREACH (output, &outputs, outputs) {
167  if (!output->active)
168  continue;
169 
170  other = &(output->rect);
171 
172  if ((direction == D_RIGHT && other->x > cur->x) ||
173  (direction == D_LEFT && other->x < cur->x)) {
174  /* Skip the output when it doesn’t overlap the other one’s y
175  * coordinate at all. */
176  if ((other->y + other->height) <= cur->y ||
177  (cur->y + cur->height) <= other->y)
178  continue;
179  } else if ((direction == D_DOWN && other->y > cur->y) ||
180  (direction == D_UP && other->y < cur->y)) {
181  /* Skip the output when it doesn’t overlap the other one’s x
182  * coordinate at all. */
183  if ((other->x + other->width) <= cur->x ||
184  (cur->x + cur->width) <= other->x)
185  continue;
186  } else
187  continue;
188 
189  /* No candidate yet? Start with this one. */
190  if (!best) {
191  best = output;
192  continue;
193  }
194 
195  if (close_far == CLOSEST_OUTPUT) {
196  /* Is this output better (closer to the current output) than our
197  * current best bet? */
198  if ((direction == D_RIGHT && other->x < best->rect.x) ||
199  (direction == D_LEFT && other->x > best->rect.x) ||
200  (direction == D_DOWN && other->y < best->rect.y) ||
201  (direction == D_UP && other->y > best->rect.y)) {
202  best = output;
203  continue;
204  }
205  } else {
206  /* Is this output better (farther to the current output) than our
207  * current best bet? */
208  if ((direction == D_RIGHT && other->x > best->rect.x) ||
209  (direction == D_LEFT && other->x < best->rect.x) ||
210  (direction == D_DOWN && other->y > best->rect.y) ||
211  (direction == D_UP && other->y < best->rect.y)) {
212  best = output;
213  continue;
214  }
215  }
216  }
217 
218  DLOG("current = %s, best = %s\n", current->name, (best ? best->name : "NULL"));
219  return best;
220 }
221 
222 /*
223  * Disables RandR support by creating exactly one output with the size of the
224  * X11 screen.
225  *
226  */
227 void disable_randr(xcb_connection_t *conn) {
228  DLOG("RandR extension unusable, disabling.\n");
229 
230  Output *s = scalloc(sizeof(Output));
231 
232  s->active = true;
233  s->rect.x = 0;
234  s->rect.y = 0;
235  s->rect.width = root_screen->width_in_pixels;
236  s->rect.height = root_screen->height_in_pixels;
237  s->name = "xroot-0";
238  output_init_con(s);
240 
242 
243  randr_disabled = true;
244 }
245 
246 /*
247  * Initializes a CT_OUTPUT Con (searches existing ones from inplace restart
248  * before) to use for the given Output.
249  *
250  */
251 void output_init_con(Output *output) {
252  Con *con = NULL, *current;
253  bool reused = false;
254 
255  DLOG("init_con for output %s\n", output->name);
256 
257  /* Search for a Con with that name directly below the root node. There
258  * might be one from a restored layout. */
259  TAILQ_FOREACH (current, &(croot->nodes_head), nodes) {
260  if (strcmp(current->name, output->name) != 0)
261  continue;
262 
263  con = current;
264  reused = true;
265  DLOG("Using existing con %p / %s\n", con, con->name);
266  break;
267  }
268 
269  if (con == NULL) {
270  con = con_new(croot, NULL);
271  FREE(con->name);
272  con->name = sstrdup(output->name);
273  con->type = CT_OUTPUT;
274  con->layout = L_OUTPUT;
276  }
277  con->rect = output->rect;
278  output->con = con;
279 
280  char *name;
281  sasprintf(&name, "[i3 con] output %s", con->name);
282  x_set_name(con, name);
283  FREE(name);
284 
285  if (reused) {
286  DLOG("Not adding workspace, this was a reused con\n");
287  return;
288  }
289 
290  DLOG("Changing layout, adding top/bottom dockarea\n");
291  Con *topdock = con_new(NULL, NULL);
292  topdock->type = CT_DOCKAREA;
293  topdock->layout = L_DOCKAREA;
294  /* this container swallows dock clients */
295  Match *match = scalloc(sizeof(Match));
296  match_init(match);
297  match->dock = M_DOCK_TOP;
298  match->insert_where = M_BELOW;
299  TAILQ_INSERT_TAIL(&(topdock->swallow_head), match, matches);
300 
301  FREE(topdock->name);
302  topdock->name = sstrdup("topdock");
303 
304  sasprintf(&name, "[i3 con] top dockarea %s", con->name);
305  x_set_name(topdock, name);
306  FREE(name);
307  DLOG("attaching\n");
308  con_attach(topdock, con, false);
309 
310  /* content container */
311 
312  DLOG("adding main content container\n");
313  Con *content = con_new(NULL, NULL);
314  content->type = CT_CON;
315  content->layout = L_SPLITH;
316  FREE(content->name);
317  content->name = sstrdup("content");
318 
319  sasprintf(&name, "[i3 con] content %s", con->name);
320  x_set_name(content, name);
321  FREE(name);
322  con_attach(content, con, false);
323 
324  /* bottom dock container */
325  Con *bottomdock = con_new(NULL, NULL);
326  bottomdock->type = CT_DOCKAREA;
327  bottomdock->layout = L_DOCKAREA;
328  /* this container swallows dock clients */
329  match = scalloc(sizeof(Match));
330  match_init(match);
331  match->dock = M_DOCK_BOTTOM;
332  match->insert_where = M_BELOW;
333  TAILQ_INSERT_TAIL(&(bottomdock->swallow_head), match, matches);
334 
335  FREE(bottomdock->name);
336  bottomdock->name = sstrdup("bottomdock");
337 
338  sasprintf(&name, "[i3 con] bottom dockarea %s", con->name);
339  x_set_name(bottomdock, name);
340  FREE(name);
341  DLOG("attaching\n");
342  con_attach(bottomdock, con, false);
343 }
344 
345 /*
346  * Initializes at least one workspace for this output, trying the following
347  * steps until there is at least one workspace:
348  *
349  * • Move existing workspaces, which are assigned to be on the given output, to
350  * the output.
351  * • Create the first assigned workspace for this output.
352  * • Create the first unused workspace.
353  *
354  */
355 void init_ws_for_output(Output *output, Con *content) {
356  /* go through all assignments and move the existing workspaces to this output */
357  struct Workspace_Assignment *assignment;
359  if (strcmp(assignment->output, output->name) != 0)
360  continue;
361 
362  /* check if this workspace actually exists */
363  Con *workspace = NULL, *out;
364  TAILQ_FOREACH (out, &(croot->nodes_head), nodes)
365  GREP_FIRST(workspace, output_get_content(out),
366  !strcasecmp(child->name, assignment->name));
367  if (workspace == NULL)
368  continue;
369 
370  /* check that this workspace is not already attached (that means the
371  * user configured this assignment twice) */
372  Con *workspace_out = con_get_output(workspace);
373  if (workspace_out == output->con) {
374  LOG("Workspace \"%s\" assigned to output \"%s\", but it is already "
375  "there. Do you have two assignment directives for the same "
376  "workspace in your configuration file?\n",
377  workspace->name, output->name);
378  continue;
379  }
380 
381  /* if so, move it over */
382  LOG("Moving workspace \"%s\" from output \"%s\" to \"%s\" due to assignment\n",
383  workspace->name, workspace_out->name, output->name);
384 
385  /* if the workspace is currently visible on that output, we need to
386  * switch to a different workspace - otherwise the output would end up
387  * with no active workspace */
388  bool visible = workspace_is_visible(workspace);
389  Con *previous = NULL;
390  if (visible && (previous = TAILQ_NEXT(workspace, focused))) {
391  LOG("Switching to previously used workspace \"%s\" on output \"%s\"\n",
392  previous->name, workspace_out->name);
393  workspace_show(previous);
394  }
395 
396  /* Render the output on which the workspace was to get correct Rects.
397  * Then, we need to work with the "content" container, since we cannot
398  * be sure that the workspace itself was rendered at all (in case it’s
399  * invisible, it won’t be rendered). */
400  render_con(workspace_out, false);
401  Con *ws_out_content = output_get_content(workspace_out);
402 
403  Con *floating_con;
404  TAILQ_FOREACH (floating_con, &(workspace->floating_head), floating_windows)
405  /* NB: We use output->con here because content is not yet rendered,
406  * so it has a rect of {0, 0, 0, 0}. */
407  floating_fix_coordinates(floating_con, &(ws_out_content->rect), &(output->con->rect));
408 
409  con_detach(workspace);
410  con_attach(workspace, content, false);
411 
412  /* In case the workspace we just moved was visible but there was no
413  * other workspace to switch to, we need to initialize the source
414  * output aswell */
415  if (visible && previous == NULL) {
416  LOG("There is no workspace left on \"%s\", re-initializing\n",
417  workspace_out->name);
419  output_get_content(workspace_out));
420  DLOG("Done re-initializing, continuing with \"%s\"\n", output->name);
421  }
422  }
423 
424  /* if a workspace exists, we are done now */
425  if (!TAILQ_EMPTY(&(content->nodes_head))) {
426  /* ensure that one of the workspaces is actually visible (in fullscreen
427  * mode), if they were invisible before, this might not be the case. */
428  Con *visible = NULL;
429  GREP_FIRST(visible, content, child->fullscreen_mode == CF_OUTPUT);
430  if (!visible) {
431  visible = TAILQ_FIRST(&(content->nodes_head));
432  focused = content;
433  workspace_show(visible);
434  }
435  return;
436  }
437 
438  /* otherwise, we create the first assigned ws for this output */
440  if (strcmp(assignment->output, output->name) != 0)
441  continue;
442 
443  LOG("Initializing first assigned workspace \"%s\" for output \"%s\"\n",
444  assignment->name, assignment->output);
445  focused = content;
446  workspace_show_by_name(assignment->name);
447  return;
448  }
449 
450  /* if there is still no workspace, we create the first free workspace */
451  DLOG("Now adding a workspace\n");
452  Con *ws = create_workspace_on_output(output, content);
453 
454  /* TODO: Set focus in main.c */
455  con_focus(ws);
456 }
457 
458 /*
459  * This function needs to be called when changing the mode of an output when
460  * it already has some workspaces (or a bar window) assigned.
461  *
462  * It reconfigures the bar window for the new mode, copies the new rect into
463  * each workspace on this output and forces all windows on the affected
464  * workspaces to be reconfigured.
465  *
466  * It is necessary to call render_layout() afterwards.
467  *
468  */
469 static void output_change_mode(xcb_connection_t *conn, Output *output) {
470  DLOG("Output mode changed, updating rect\n");
471  assert(output->con != NULL);
472  output->con->rect = output->rect;
473 
474  Con *content, *workspace, *child;
475 
476  /* Point content to the container of the workspaces */
477  content = output_get_content(output->con);
478 
479  /* Fix the position of all floating windows on this output.
480  * The 'rect' of each workspace will be updated in src/render.c. */
481  TAILQ_FOREACH (workspace, &(content->nodes_head), nodes) {
482  TAILQ_FOREACH (child, &(workspace->floating_head), floating_windows) {
483  floating_fix_coordinates(child, &(workspace->rect), &(output->con->rect));
484  }
485  }
486 
487  /* If default_orientation is NO_ORIENTATION, we change the orientation of
488  * the workspaces and their childs depending on output resolution. This is
489  * only done for workspaces with maximum one child. */
491  TAILQ_FOREACH (workspace, &(content->nodes_head), nodes) {
492  /* Workspaces with more than one child are left untouched because
493  * we do not want to change an existing layout. */
494  if (con_num_children(workspace) > 1)
495  continue;
496 
497  workspace->layout = (output->rect.height > output->rect.width) ? L_SPLITV : L_SPLITH;
498  DLOG("Setting workspace [%d,%s]'s layout to %d.\n", workspace->num, workspace->name, workspace->layout);
499  if ((child = TAILQ_FIRST(&(workspace->nodes_head)))) {
500  if (child->layout == L_SPLITV || child->layout == L_SPLITH)
501  child->layout = workspace->layout;
502  DLOG("Setting child [%d,%s]'s layout to %d.\n", child->num, child->name, child->layout);
503  }
504  }
505  }
506 }
507 
508 /*
509  * Gets called by randr_query_outputs() for each output. The function adds new
510  * outputs to the list of outputs, checks if the mode of existing outputs has
511  * been changed or if an existing output has been disabled. It will then change
512  * either the "changed" or the "to_be_deleted" flag of the output, if
513  * appropriate.
514  *
515  */
516 static void handle_output(xcb_connection_t *conn, xcb_randr_output_t id,
517  xcb_randr_get_output_info_reply_t *output,
518  xcb_timestamp_t cts, resources_reply *res) {
519  /* each CRT controller has a position in which we are interested in */
520  crtc_info *crtc;
521 
522  Output *new = get_output_by_id(id);
523  bool existing = (new != NULL);
524  if (!existing)
525  new = scalloc(sizeof(Output));
526  new->id = id;
527  new->primary = (primary && primary->output == id);
528  FREE(new->name);
529  sasprintf(&new->name, "%.*s",
530  xcb_randr_get_output_info_name_length(output),
531  xcb_randr_get_output_info_name(output));
532 
533  DLOG("found output with name %s\n", new->name);
534 
535  /* Even if no CRTC is used at the moment, we store the output so that
536  * we do not need to change the list ever again (we only update the
537  * position/size) */
538  if (output->crtc == XCB_NONE) {
539  if (!existing) {
540  if (new->primary)
542  else
544  } else if (new->active)
545  new->to_be_disabled = true;
546  return;
547  }
548 
549  xcb_randr_get_crtc_info_cookie_t icookie;
550  icookie = xcb_randr_get_crtc_info(conn, output->crtc, cts);
551  if ((crtc = xcb_randr_get_crtc_info_reply(conn, icookie, NULL)) == NULL) {
552  DLOG("Skipping output %s: could not get CRTC (%p)\n",
553  new->name, crtc);
554  free(new);
555  return;
556  }
557 
558  bool updated = update_if_necessary(&(new->rect.x), crtc->x) |
559  update_if_necessary(&(new->rect.y), crtc->y) |
560  update_if_necessary(&(new->rect.width), crtc->width) |
561  update_if_necessary(&(new->rect.height), crtc->height);
562  free(crtc);
563  new->active = (new->rect.width != 0 && new->rect.height != 0);
564  if (!new->active) {
565  DLOG("width/height 0/0, disabling output\n");
566  return;
567  }
568 
569  DLOG("mode: %dx%d+%d+%d\n", new->rect.width, new->rect.height,
570  new->rect.x, new->rect.y);
571 
572  /* If we don’t need to change an existing output or if the output
573  * does not exist in the first place, the case is simple: we either
574  * need to insert the new output or we are done. */
575  if (!updated || !existing) {
576  if (!existing) {
577  if (new->primary)
579  else
581  }
582  return;
583  }
584 
585  new->changed = true;
586 }
587 
588 /*
589  * (Re-)queries the outputs via RandR and stores them in the list of outputs.
590  *
591  */
593  Output *output, *other, *first;
594  xcb_randr_get_output_primary_cookie_t pcookie;
595  xcb_randr_get_screen_resources_current_cookie_t rcookie;
596  resources_reply *res;
597 
598  /* timestamp of the configuration so that we get consistent replies to all
599  * requests (if the configuration changes between our different calls) */
600  xcb_timestamp_t cts;
601 
602  /* an output is VGA-1, LVDS-1, etc. (usually physical video outputs) */
603  xcb_randr_output_t *randr_outputs;
604 
605  if (randr_disabled)
606  return;
607 
608  /* Get screen resources (primary output, crtcs, outputs, modes) */
609  rcookie = xcb_randr_get_screen_resources_current(conn, root);
610  pcookie = xcb_randr_get_output_primary(conn, root);
611 
612  if ((primary = xcb_randr_get_output_primary_reply(conn, pcookie, NULL)) == NULL)
613  ELOG("Could not get RandR primary output\n");
614  else
615  DLOG("primary output is %08x\n", primary->output);
616  if ((res = xcb_randr_get_screen_resources_current_reply(conn, rcookie, NULL)) == NULL) {
618  return;
619  }
620  cts = res->config_timestamp;
621 
622  int len = xcb_randr_get_screen_resources_current_outputs_length(res);
623  randr_outputs = xcb_randr_get_screen_resources_current_outputs(res);
624 
625  /* Request information for each output */
626  xcb_randr_get_output_info_cookie_t ocookie[len];
627  for (int i = 0; i < len; i++)
628  ocookie[i] = xcb_randr_get_output_info(conn, randr_outputs[i], cts);
629 
630  /* Loop through all outputs available for this X11 screen */
631  for (int i = 0; i < len; i++) {
632  xcb_randr_get_output_info_reply_t *output;
633 
634  if ((output = xcb_randr_get_output_info_reply(conn, ocookie[i], NULL)) == NULL)
635  continue;
636 
637  handle_output(conn, randr_outputs[i], output, cts, res);
638  free(output);
639  }
640 
641  /* Check for clones, disable the clones and reduce the mode to the
642  * lowest common mode */
643  TAILQ_FOREACH (output, &outputs, outputs) {
644  if (!output->active || output->to_be_disabled)
645  continue;
646  DLOG("output %p / %s, position (%d, %d), checking for clones\n",
647  output, output->name, output->rect.x, output->rect.y);
648 
649  for (other = output;
650  other != TAILQ_END(&outputs);
651  other = TAILQ_NEXT(other, outputs)) {
652  if (other == output || !other->active || other->to_be_disabled)
653  continue;
654 
655  if (other->rect.x != output->rect.x ||
656  other->rect.y != output->rect.y)
657  continue;
658 
659  DLOG("output %p has the same position, his mode = %d x %d\n",
660  other, other->rect.width, other->rect.height);
661  uint32_t width = min(other->rect.width, output->rect.width);
662  uint32_t height = min(other->rect.height, output->rect.height);
663 
664  if (update_if_necessary(&(output->rect.width), width) |
665  update_if_necessary(&(output->rect.height), height))
666  output->changed = true;
667 
668  update_if_necessary(&(other->rect.width), width);
669  update_if_necessary(&(other->rect.height), height);
670 
671  DLOG("disabling output %p (%s)\n", other, other->name);
672  other->to_be_disabled = true;
673 
674  DLOG("new output mode %d x %d, other mode %d x %d\n",
675  output->rect.width, output->rect.height,
676  other->rect.width, other->rect.height);
677  }
678  }
679 
680  /* Ensure that all outputs which are active also have a con. This is
681  * necessary because in the next step, a clone might get disabled. Example:
682  * LVDS1 active, VGA1 gets activated as a clone of LVDS1 (has no con).
683  * LVDS1 gets disabled. */
684  TAILQ_FOREACH (output, &outputs, outputs) {
685  if (output->active && output->con == NULL) {
686  DLOG("Need to initialize a Con for output %s\n", output->name);
687  output_init_con(output);
688  output->changed = false;
689  }
690  }
691 
692  /* Handle outputs which have a new mode or are disabled now (either
693  * because the user disabled them or because they are clones) */
694  TAILQ_FOREACH (output, &outputs, outputs) {
695  if (output->to_be_disabled) {
696  output->active = false;
697  DLOG("Output %s disabled, re-assigning workspaces/docks\n", output->name);
698 
699  first = get_first_output();
700 
701  /* TODO: refactor the following code into a nice function. maybe
702  * use an on_destroy callback which is implement differently for
703  * different container types (CT_CONTENT vs. CT_DOCKAREA)? */
704  Con *first_content = output_get_content(first->con);
705 
706  if (output->con != NULL) {
707  /* We need to move the workspaces from the disappearing output to the first output */
708  /* 1: Get the con to focus next, if the disappearing ws is focused */
709  Con *next = NULL;
710  if (TAILQ_FIRST(&(croot->focus_head)) == output->con) {
711  DLOG("This output (%p) was focused! Getting next\n", output->con);
712  next = focused;
713  DLOG("next = %p\n", next);
714  }
715 
716  /* 2: iterate through workspaces and re-assign them, fixing the coordinates
717  * of floating containers as we go */
718  Con *current;
719  Con *old_content = output_get_content(output->con);
720  while (!TAILQ_EMPTY(&(old_content->nodes_head))) {
721  current = TAILQ_FIRST(&(old_content->nodes_head));
722  if (current != next && TAILQ_EMPTY(&(current->focus_head))) {
723  /* the workspace is empty and not focused, get rid of it */
724  DLOG("Getting rid of current = %p / %s (empty, unfocused)\n", current, current->name);
725  tree_close(current, DONT_KILL_WINDOW, false, false);
726  continue;
727  }
728  DLOG("Detaching current = %p / %s\n", current, current->name);
729  con_detach(current);
730  DLOG("Re-attaching current = %p / %s\n", current, current->name);
731  con_attach(current, first_content, false);
732  DLOG("Fixing the coordinates of floating containers\n");
733  Con *floating_con;
734  TAILQ_FOREACH (floating_con, &(current->floating_head), floating_windows)
735  floating_fix_coordinates(floating_con, &(output->con->rect), &(first->con->rect));
736  DLOG("Done, next\n");
737  }
738  DLOG("re-attached all workspaces\n");
739 
740  if (next) {
741  DLOG("now focusing next = %p\n", next);
742  con_focus(next);
744  }
745 
746  /* 3: move the dock clients to the first output */
747  Con *child;
748  TAILQ_FOREACH (child, &(output->con->nodes_head), nodes) {
749  if (child->type != CT_DOCKAREA)
750  continue;
751  DLOG("Handling dock con %p\n", child);
752  Con *dock;
753  while (!TAILQ_EMPTY(&(child->nodes_head))) {
754  dock = TAILQ_FIRST(&(child->nodes_head));
755  Con *nc;
756  Match *match;
757  nc = con_for_window(first->con, dock->window, &match);
758  DLOG("Moving dock client %p to nc %p\n", dock, nc);
759  con_detach(dock);
760  DLOG("Re-attaching\n");
761  con_attach(dock, nc, false);
762  DLOG("Done\n");
763  }
764  }
765 
766  DLOG("destroying disappearing con %p\n", output->con);
767  tree_close(output->con, DONT_KILL_WINDOW, true, false);
768  DLOG("Done. Should be fine now\n");
769  output->con = NULL;
770  }
771 
772  output->to_be_disabled = false;
773  output->changed = false;
774  }
775 
776  if (output->changed) {
777  output_change_mode(conn, output);
778  output->changed = false;
779  }
780  }
781 
782  if (TAILQ_EMPTY(&outputs)) {
783  ELOG("No outputs found via RandR, disabling\n");
785  }
786 
787  /* Verifies that there is at least one active output as a side-effect. */
789 
790  /* Just go through each active output and assign one workspace */
791  TAILQ_FOREACH (output, &outputs, outputs) {
792  if (!output->active)
793  continue;
794  Con *content = output_get_content(output->con);
795  if (!TAILQ_EMPTY(&(content->nodes_head)))
796  continue;
797  DLOG("Should add ws for output %s\n", output->name);
798  init_ws_for_output(output, content);
799  }
800 
801  /* Focus the primary screen, if possible */
802  TAILQ_FOREACH (output, &outputs, outputs) {
803  if (!output->primary || !output->con)
804  continue;
805 
806  DLOG("Focusing primary output %s\n", output->name);
808  }
809 
810  /* render_layout flushes */
811  tree_render();
812 
813  FREE(res);
814  FREE(primary);
815 }
816 
817 /*
818  * We have just established a connection to the X server and need the initial
819  * XRandR information to setup workspaces for each screen.
820  *
821  */
822 void randr_init(int *event_base) {
823  const xcb_query_extension_reply_t *extreply;
824 
825  extreply = xcb_get_extension_data(conn, &xcb_randr_id);
826  if (!extreply->present) {
828  return;
829  } else
831 
832  if (event_base != NULL)
833  *event_base = extreply->first_event;
834 
835  xcb_randr_select_input(conn, root,
836  XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE |
837  XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE |
838  XCB_RANDR_NOTIFY_MASK_CRTC_CHANGE |
839  XCB_RANDR_NOTIFY_MASK_OUTPUT_PROPERTY);
840 
841  xcb_flush(conn);
842 }
bool update_if_necessary(uint32_t *destination, const uint32_t new_value)
Updates *destination with new_value and returns true if it was changed or false if it was the same...
Definition: util.c:95
char * sstrdup(const char *str)
Safe-wrapper around strdup which exits if malloc returns NULL (meaning that there is no more memory a...
Output * get_output_by_name(const char *name)
Returns the output with the given name if it is active (!) or NULL.
Definition: randr.c:51
char * name
Name of the output.
Definition: data.h:316
void tree_render(void)
Renders the tree, that is rendering all outputs using render_con() and pushing the changes to X11 usi...
Definition: tree.c:507
direction_t
Definition: data.h:54
uint32_t y
Definition: data.h:124
void con_attach(Con *con, Con *parent, bool ignore_focus)
Attaches the given container to the given parent.
Definition: con.c:103
uint32_t height
Definition: data.h:33
Config config
Definition: config.c:19
xcb_connection_t * conn
Definition: main.c:47
xcb_randr_get_crtc_info_reply_t crtc_info
Definition: randr.c:21
Output * get_output_next(direction_t direction, Output *current, output_close_far_t close_far)
Gets the output which is the next one in the given direction.
Definition: randr.c:161
Con * con_get_workspace(Con *con)
Gets the workspace container this node is on.
Definition: con.c:317
Stores which workspace (by name or number) goes to which output.
Definition: data.h:172
Definition: data.h:54
bool to_be_disabled
Definition: data.h:312
Stores a rectangle, for example the size of a window, the child window etc.
Definition: data.h:122
#define LOG(fmt,...)
Definition: libi3.h:76
bool workspace_is_visible(Con *ws)
Returns true if the workspace is currently visible.
Definition: workspace.c:232
void init_ws_for_output(Output *output, Con *content)
Initializes at least one workspace for this output, trying the following steps until there is at leas...
Definition: randr.c:355
void con_detach(Con *con)
Detaches the given container from its current parent.
Definition: con.c:197
xcb_randr_output_t id
Output id, so that we can requery the output directly later.
Definition: data.h:303
void workspace_show(Con *workspace)
Switches to the given workspace.
Definition: workspace.c:447
Con * con_descend_focused(Con *con)
Returns the focused con inside this client, descending the tree as far as possible.
Definition: con.c:983
struct Rect rect
Definition: data.h:514
Rect rect
x, y, width, height
Definition: data.h:322
xcb_screen_t * root_screen
Definition: main.c:59
#define TAILQ_FIRST(head)
Definition: queue.h:323
Definition: data.h:54
struct Window * window
Definition: data.h:547
uint32_t width
Definition: data.h:32
static void handle_output(xcb_connection_t *conn, xcb_randr_output_t id, xcb_randr_get_output_info_reply_t *output, xcb_timestamp_t cts, resources_reply *res)
Definition: randr.c:516
Con * create_workspace_on_output(Output *output, Con *content)
Definition: workspace.c:110
An Output is a physical output on your graphics driver.
Definition: data.h:301
#define TAILQ_NEXT(elm, field)
Definition: queue.h:325
Con * con_new(Con *parent, i3Window *window)
Definition: con.c:87
void workspace_show_by_name(const char *num)
Looks up the workspace by name and switches to it.
Definition: workspace.c:455
Output * get_output_next_wrap(direction_t direction, Output *current)
Like get_output_next with close_far == CLOSEST_OUTPUT, but wraps.
Definition: randr.c:129
int default_orientation
Default orientation for new containers.
Definition: config.h:104
enum Con::@18 type
#define DLOG(fmt,...)
Definition: libi3.h:86
void disable_randr(xcb_connection_t *conn)
Disables RandR support by creating exactly one output with the size of the X11 screen.
Definition: randr.c:227
int sasprintf(char **strp, const char *fmt,...)
Safe-wrapper around asprintf which exits if it returns -1 (meaning that there is no more memory avail...
void randr_query_outputs(void)
Initializes the specified output, assigning the specified workspace to it.
Definition: randr.c:592
bool tree_close(Con *con, kill_window_t kill_window, bool dont_kill_parent, bool force_set_focus)
Closes the given container including all children.
Definition: tree.c:190
#define die(...)
Definition: util.h:17
struct outputs_head outputs
Definition: randr.c:28
uint32_t height
Definition: data.h:126
Con * con_for_window(Con *con, i3Window *window, Match **store_match)
Returns the first container below 'con' which wants to swallow this window TODO: priority.
Definition: con.c:487
Definition: data.h:54
#define TAILQ_INSERT_HEAD(head, elm, field)
Definition: queue.h:352
Con * focused
Definition: tree.c:15
static void output_change_mode(xcb_connection_t *conn, Output *output)
Definition: randr.c:469
Con * con
Pointer to the Con which represents this output.
Definition: data.h:319
bool contained_by_output(Rect rect)
Definition: randr.c:103
int num
the workspace number, if this Con is of type CT_WORKSPACE and the workspace is not a named workspace ...
Definition: data.h:510
char * name
Definition: data.h:520
fullscreen_mode_t fullscreen_mode
Definition: data.h:563
Definition: data.h:91
void x_set_name(Con *con, const char *name)
Sets the WM_NAME property (so, no UTF8, but used only for debugging anyways) of the given name...
Definition: x.c:1100
void con_focus(Con *con)
Sets input focus to the given container.
Definition: con.c:213
#define TAILQ_EMPTY(head)
Definition: queue.h:331
static bool randr_disabled
Definition: randr.c:30
int con_num_children(Con *con)
Returns the number of children of this container.
Definition: con.c:526
Output * get_first_output(void)
Returns the first output which is active.
Definition: randr.c:65
bool active
Whether the output is currently active (has a CRTC attached with a valid mode)
Definition: data.h:307
Definition: data.h:54
enum Match::@13 dock
bool changed
Internal flags, necessary for querying RandR screens (happens in two stages)
Definition: data.h:311
static Output * get_output_by_id(xcb_randr_output_t id)
Definition: randr.c:38
#define ELOG(fmt,...)
Definition: libi3.h:81
A "match" is a data structure which acts like a mask or expression to match certain windows or not...
Definition: data.h:390
void randr_init(int *event_base)
We have just established a connection to the X server and need the initial XRandR information to setu...
Definition: randr.c:822
output_close_far_t
Definition: randr.h:20
#define GREP_FIRST(dest, head, condition)
Definition: util.h:37
layout_t layout
Definition: data.h:578
A 'Con' represents everything from the X11 root window down to a single X11 window.
Definition: data.h:479
uint32_t x
Definition: data.h:123
void * scalloc(size_t size)
Safe-wrapper around calloc which exits if malloc returns NULL (meaning that there is no more memory a...
Definition: data.h:89
xcb_randr_get_output_primary_reply_t * primary
Definition: randr.c:25
#define TAILQ_END(head)
Definition: queue.h:324
int min(int a, int b)
Definition: util.c:29
Output * get_output_containing(unsigned int x, unsigned int y)
Returns the active (!) output which contains the coordinates x, y or NULL if there is no output which...
Definition: randr.c:80
enum Match::@15 insert_where
#define TAILQ_INSERT_TAIL(head, elm, field)
Definition: queue.h:362
struct Con * croot
Definition: tree.c:14
xcb_window_t root
Definition: main.c:60
#define TAILQ_HEAD_INITIALIZER(head)
Definition: queue.h:311
Con * output_get_content(Con *output)
Returns the output container below the given output container.
Definition: output.c:18
uint32_t y
Definition: data.h:31
Con * con_get_output(Con *con)
Gets the output container (first container with CT_OUTPUT in hierarchy) this node is on...
Definition: con.c:303
void floating_fix_coordinates(Con *con, Rect *old_rect, Rect *new_rect)
Fixes the coordinates of the floating window whenever the window gets reassigned to a different outpu...
Definition: floating.c:783
#define TAILQ_FOREACH(var, head, field)
Definition: queue.h:334
void con_fix_percent(Con *con)
Updates the percent attribute of the children of the given container.
Definition: con.c:542
uint32_t x
Definition: data.h:30
xcb_randr_get_screen_resources_current_reply_t resources_reply
Definition: randr.c:22
#define FREE(pointer)
Definition: util.h:46
bool primary
Definition: data.h:313
struct ws_assignments_head ws_assignments
Definition: main.c:93
void match_init(Match *match)
Definition: match.c:28
void output_init_con(Output *output)
Initializes a CT_OUTPUT Con (searches existing ones from inplace restart before) to use for the given...
Definition: randr.c:251
void render_con(Con *con, bool render_fullscreen)
"Renders" the given container (and its children), meaning that all rects are updated correctly...
Definition: render.c:126
uint32_t width
Definition: data.h:125
Definition: data.h:90