i3
randr.c
Go to the documentation of this file.
1 /*
2  * vim:ts=4:sw=4:expandtab
3  *
4  * i3 - an improved dynamic tiling window manager
5  * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
6  *
7  * For more information on RandR, please see the X.org RandR specification at
8  * http://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt
9  * (take your time to read it completely, it answers all questions).
10  *
11  */
12 #include "all.h"
13 
14 #include <time.h>
15 #include <xcb/randr.h>
16 
17 /* While a clean namespace is usually a pretty good thing, we really need
18  * to use shorter names than the whole xcb_randr_* default names. */
19 typedef xcb_randr_get_crtc_info_reply_t crtc_info;
20 typedef xcb_randr_get_screen_resources_current_reply_t resources_reply;
21 
22 /* Pointer to the result of the query for primary output */
23 xcb_randr_get_output_primary_reply_t *primary;
24 
25 /* Stores all outputs available in your current session. */
26 struct outputs_head outputs = TAILQ_HEAD_INITIALIZER(outputs);
27 
28 static bool randr_disabled = false;
29 
30 /*
31  * Get a specific output by its internal X11 id. Used by randr_query_outputs
32  * to check if the output is new (only in the first scan) or if we are
33  * re-scanning.
34  *
35  */
36 static Output *get_output_by_id(xcb_randr_output_t id) {
37  Output *output;
38  TAILQ_FOREACH(output, &outputs, outputs)
39  if (output->id == id)
40  return output;
41 
42  return NULL;
43 }
44 
45 /*
46  * Returns the output with the given name if it is active (!) or NULL.
47  *
48  */
49 Output *get_output_by_name(const char *name) {
50  Output *output;
51  TAILQ_FOREACH(output, &outputs, outputs)
52  if (output->active &&
53  strcasecmp(output->name, name) == 0)
54  return output;
55 
56  return NULL;
57 }
58 
59 /*
60  * Returns the first output which is active.
61  *
62  */
64  Output *output;
65 
66  TAILQ_FOREACH(output, &outputs, outputs)
67  if (output->active)
68  return output;
69 
70  return NULL;
71 }
72 
73 /*
74  * Returns the active (!) output which contains the coordinates x, y or NULL
75  * if there is no output which contains these coordinates.
76  *
77  */
79  Output *output;
80  TAILQ_FOREACH(output, &outputs, outputs) {
81  if (!output->active)
82  continue;
83  DLOG("comparing x=%d y=%d with x=%d and y=%d width %d height %d\n",
84  x, y, output->rect.x, output->rect.y, output->rect.width, output->rect.height);
85  if (x >= output->rect.x && x < (output->rect.x + output->rect.width) &&
86  y >= output->rect.y && y < (output->rect.y + output->rect.height))
87  return output;
88  }
89 
90  return NULL;
91 }
92 
93 /*
94  * Gets the output which is the last one in the given direction, for example
95  * the output on the most bottom when direction == D_DOWN, the output most
96  * right when direction == D_RIGHT and so on.
97  *
98  * This function always returns a output.
99  *
100  */
101 Output *get_output_most(direction_t direction, Output *current) {
102  Output *output, *candidate = NULL;
103  int position = 0;
104  TAILQ_FOREACH(output, &outputs, outputs) {
105  if (!output->active)
106  continue;
107 
108  /* Repeated calls of WIN determine the winner of the comparison */
109  #define WIN(variable, condition) \
110  if (variable condition) { \
111  candidate = output; \
112  position = variable; \
113  } \
114  break;
115 
116  if (((direction == D_UP) || (direction == D_DOWN)) &&
117  (current->rect.x != output->rect.x))
118  continue;
119 
120  if (((direction == D_LEFT) || (direction == D_RIGHT)) &&
121  (current->rect.y != output->rect.y))
122  continue;
123 
124  switch (direction) {
125  case D_UP:
126  WIN(output->rect.y, <= position);
127  case D_DOWN:
128  WIN(output->rect.y, >= position);
129  case D_LEFT:
130  WIN(output->rect.x, <= position);
131  case D_RIGHT:
132  WIN(output->rect.x, >= position);
133  }
134  }
135 
136  assert(candidate != NULL);
137 
138  return candidate;
139 }
140 
141 /*
142  * Gets the output which is the next one in the given direction.
143  *
144  */
145 Output *get_output_next(direction_t direction, Output *current) {
146  Output *output, *candidate = NULL;
147 
148  TAILQ_FOREACH(output, &outputs, outputs) {
149  if (!output->active)
150  continue;
151 
152  if (((direction == D_UP) || (direction == D_DOWN)) &&
153  (current->rect.x != output->rect.x))
154  continue;
155 
156  if (((direction == D_LEFT) || (direction == D_RIGHT)) &&
157  (current->rect.y != output->rect.y))
158  continue;
159 
160  switch (direction) {
161  case D_UP:
162  if (output->rect.y < current->rect.y &&
163  (!candidate || output->rect.y < candidate->rect.y))
164  candidate = output;
165  break;
166  case D_DOWN:
167  if (output->rect.y > current->rect.y &&
168  (!candidate || output->rect.y > candidate->rect.y))
169  candidate = output;
170  break;
171  case D_LEFT:
172  if (output->rect.x < current->rect.x &&
173  (!candidate || output->rect.x > candidate->rect.x))
174  candidate = output;
175  break;
176  case D_RIGHT:
177  if (output->rect.x > current->rect.x &&
178  (!candidate || output->rect.x < candidate->rect.x))
179  candidate = output;
180  break;
181  }
182  }
183 
184  return candidate;
185 }
186 
187 /*
188  * Disables RandR support by creating exactly one output with the size of the
189  * X11 screen.
190  *
191  */
192 void disable_randr(xcb_connection_t *conn) {
193  DLOG("RandR extension unusable, disabling.\n");
194 
195  Output *s = scalloc(sizeof(Output));
196 
197  s->active = true;
198  s->rect.x = 0;
199  s->rect.y = 0;
200  s->rect.width = root_screen->width_in_pixels;
201  s->rect.height = root_screen->height_in_pixels;
202  s->name = "xroot-0";
203  output_init_con(s);
205 
207 
208  randr_disabled = true;
209 }
210 
211 /*
212  * Initializes a CT_OUTPUT Con (searches existing ones from inplace restart
213  * before) to use for the given Output.
214  *
215  */
216 void output_init_con(Output *output) {
217  Con *con = NULL, *current;
218  bool reused = false;
219 
220  DLOG("init_con for output %s\n", output->name);
221 
222  /* Search for a Con with that name directly below the root node. There
223  * might be one from a restored layout. */
224  TAILQ_FOREACH(current, &(croot->nodes_head), nodes) {
225  if (strcmp(current->name, output->name) != 0)
226  continue;
227 
228  con = current;
229  reused = true;
230  DLOG("Using existing con %p / %s\n", con, con->name);
231  break;
232  }
233 
234  if (con == NULL) {
235  con = con_new(croot, NULL);
236  FREE(con->name);
237  con->name = sstrdup(output->name);
238  con->type = CT_OUTPUT;
239  con->layout = L_OUTPUT;
241  }
242  con->rect = output->rect;
243  output->con = con;
244 
245  char *name;
246  sasprintf(&name, "[i3 con] output %s", con->name);
247  x_set_name(con, name);
248  FREE(name);
249 
250  if (reused) {
251  DLOG("Not adding workspace, this was a reused con\n");
252  return;
253  }
254 
255  DLOG("Changing layout, adding top/bottom dockarea\n");
256  Con *topdock = con_new(NULL, NULL);
257  topdock->type = CT_DOCKAREA;
258  topdock->layout = L_DOCKAREA;
259  topdock->orientation = VERT;
260  /* this container swallows dock clients */
261  Match *match = scalloc(sizeof(Match));
262  match_init(match);
263  match->dock = M_DOCK_TOP;
264  match->insert_where = M_BELOW;
265  TAILQ_INSERT_TAIL(&(topdock->swallow_head), match, matches);
266 
267  FREE(topdock->name);
268  topdock->name = sstrdup("topdock");
269 
270  sasprintf(&name, "[i3 con] top dockarea %s", con->name);
271  x_set_name(topdock, name);
272  FREE(name);
273  DLOG("attaching\n");
274  con_attach(topdock, con, false);
275 
276  /* content container */
277 
278  DLOG("adding main content container\n");
279  Con *content = con_new(NULL, NULL);
280  content->type = CT_CON;
281  FREE(content->name);
282  content->name = sstrdup("content");
283 
284  sasprintf(&name, "[i3 con] content %s", con->name);
285  x_set_name(content, name);
286  FREE(name);
287  con_attach(content, con, false);
288 
289  /* bottom dock container */
290  Con *bottomdock = con_new(NULL, NULL);
291  bottomdock->type = CT_DOCKAREA;
292  bottomdock->layout = L_DOCKAREA;
293  bottomdock->orientation = VERT;
294  /* this container swallows dock clients */
295  match = scalloc(sizeof(Match));
296  match_init(match);
297  match->dock = M_DOCK_BOTTOM;
298  match->insert_where = M_BELOW;
299  TAILQ_INSERT_TAIL(&(bottomdock->swallow_head), match, matches);
300 
301  FREE(bottomdock->name);
302  bottomdock->name = sstrdup("bottomdock");
303 
304  sasprintf(&name, "[i3 con] bottom dockarea %s", con->name);
305  x_set_name(bottomdock, name);
306  FREE(name);
307  DLOG("attaching\n");
308  con_attach(bottomdock, con, false);
309 }
310 
311 /*
312  * Initializes at least one workspace for this output, trying the following
313  * steps until there is at least one workspace:
314  *
315  * • Move existing workspaces, which are assigned to be on the given output, to
316  * the output.
317  * • Create the first assigned workspace for this output.
318  * • Create the first unused workspace.
319  *
320  */
321 void init_ws_for_output(Output *output, Con *content) {
322  /* go through all assignments and move the existing workspaces to this output */
323  struct Workspace_Assignment *assignment;
325  if (strcmp(assignment->output, output->name) != 0)
326  continue;
327 
328  /* check if this workspace actually exists */
329  Con *workspace = NULL, *out;
330  TAILQ_FOREACH(out, &(croot->nodes_head), nodes)
331  GREP_FIRST(workspace, output_get_content(out),
332  !strcasecmp(child->name, assignment->name));
333  if (workspace == NULL)
334  continue;
335 
336  /* check that this workspace is not already attached (that means the
337  * user configured this assignment twice) */
338  Con *workspace_out = con_get_output(workspace);
339  if (workspace_out == output->con) {
340  LOG("Workspace \"%s\" assigned to output \"%s\", but it is already "
341  "there. Do you have two assignment directives for the same "
342  "workspace in your configuration file?\n",
343  workspace->name, output->name);
344  continue;
345  }
346 
347  /* if so, move it over */
348  LOG("Moving workspace \"%s\" from output \"%s\" to \"%s\" due to assignment\n",
349  workspace->name, workspace_out->name, output->name);
350 
351  /* if the workspace is currently visible on that output, we need to
352  * switch to a different workspace - otherwise the output would end up
353  * with no active workspace */
354  bool visible = workspace_is_visible(workspace);
355  Con *previous = NULL;
356  if (visible && (previous = TAILQ_NEXT(workspace, focused))) {
357  LOG("Switching to previously used workspace \"%s\" on output \"%s\"\n",
358  previous->name, workspace_out->name);
359  workspace_show(previous);
360  }
361 
362  con_detach(workspace);
363  con_attach(workspace, content, false);
364 
365  /* In case the workspace we just moved was visible but there was no
366  * other workspace to switch to, we need to initialize the source
367  * output aswell */
368  if (visible && previous == NULL) {
369  LOG("There is no workspace left on \"%s\", re-initializing\n",
370  workspace_out->name);
372  output_get_content(workspace_out));
373  DLOG("Done re-initializing, continuing with \"%s\"\n", output->name);
374  }
375  }
376 
377  /* if a workspace exists, we are done now */
378  if (!TAILQ_EMPTY(&(content->nodes_head))) {
379  /* ensure that one of the workspaces is actually visible (in fullscreen
380  * mode), if they were invisible before, this might not be the case. */
381  Con *visible = NULL;
382  GREP_FIRST(visible, content, child->fullscreen_mode == CF_OUTPUT);
383  if (!visible) {
384  visible = TAILQ_FIRST(&(content->nodes_head));
385  focused = content;
386  workspace_show(visible);
387  }
388  return;
389  }
390 
391  /* otherwise, we create the first assigned ws for this output */
393  if (strcmp(assignment->output, output->name) != 0)
394  continue;
395 
396  LOG("Initializing first assigned workspace \"%s\" for output \"%s\"\n",
397  assignment->name, assignment->output);
398  focused = content;
399  workspace_show_by_name(assignment->name);
400  return;
401  }
402 
403  /* if there is still no workspace, we create the first free workspace */
404  DLOG("Now adding a workspace\n");
405  Con *ws = create_workspace_on_output(output, content);
406 
407  /* TODO: Set focus in main.c */
408  con_focus(ws);
409 }
410 
411 /*
412  * This function needs to be called when changing the mode of an output when
413  * it already has some workspaces (or a bar window) assigned.
414  *
415  * It reconfigures the bar window for the new mode, copies the new rect into
416  * each workspace on this output and forces all windows on the affected
417  * workspaces to be reconfigured.
418  *
419  * It is necessary to call render_layout() afterwards.
420  *
421  */
422 static void output_change_mode(xcb_connection_t *conn, Output *output) {
423  DLOG("Output mode changed, updating rect\n");
424  assert(output->con != NULL);
425  output->con->rect = output->rect;
426 
427  Con *content, *workspace, *child;
428 
429  /* Point content to the container of the workspaces */
430  content = output_get_content(output->con);
431 
432  /* Fix the position of all floating windows on this output.
433  * The 'rect' of each workspace will be updated in src/render.c. */
434  TAILQ_FOREACH(workspace, &(content->nodes_head), nodes) {
435  TAILQ_FOREACH(child, &(workspace->floating_head), floating_windows) {
436  floating_fix_coordinates(child, &(workspace->rect), &(output->con->rect));
437  }
438  }
439 
440  /* If default_orientation is NO_ORIENTATION, we change the orientation of
441  * the workspaces and their childs depending on output resolution. This is
442  * only done for workspaces with maximum one child. */
444  TAILQ_FOREACH(workspace, &(content->nodes_head), nodes) {
445  /* Workspaces with more than one child are left untouched because
446  * we do not want to change an existing layout. */
447  if (con_num_children(workspace) > 1)
448  continue;
449 
450  workspace->orientation = (output->rect.height > output->rect.width) ? VERT : HORIZ;
451  DLOG("Setting workspace [%d,%s]'s orientation to %d.\n", workspace->num, workspace->name, workspace->orientation);
452  if ((child = TAILQ_FIRST(&(workspace->nodes_head)))) {
453  child->orientation = workspace->orientation;
454  DLOG("Setting child [%d,%s]'s orientation to %d.\n", child->num, child->name, child->orientation);
455  }
456  }
457  }
458 }
459 
460 /*
461  * Gets called by randr_query_outputs() for each output. The function adds new
462  * outputs to the list of outputs, checks if the mode of existing outputs has
463  * been changed or if an existing output has been disabled. It will then change
464  * either the "changed" or the "to_be_deleted" flag of the output, if
465  * appropriate.
466  *
467  */
468 static void handle_output(xcb_connection_t *conn, xcb_randr_output_t id,
469  xcb_randr_get_output_info_reply_t *output,
470  xcb_timestamp_t cts, resources_reply *res) {
471  /* each CRT controller has a position in which we are interested in */
472  crtc_info *crtc;
473 
474  Output *new = get_output_by_id(id);
475  bool existing = (new != NULL);
476  if (!existing)
477  new = scalloc(sizeof(Output));
478  new->id = id;
479  new->primary = (primary && primary->output == id);
480  FREE(new->name);
481  sasprintf(&new->name, "%.*s",
482  xcb_randr_get_output_info_name_length(output),
483  xcb_randr_get_output_info_name(output));
484 
485  DLOG("found output with name %s\n", new->name);
486 
487  /* Even if no CRTC is used at the moment, we store the output so that
488  * we do not need to change the list ever again (we only update the
489  * position/size) */
490  if (output->crtc == XCB_NONE) {
491  if (!existing) {
492  if (new->primary)
494  else TAILQ_INSERT_TAIL(&outputs, new, outputs);
495  } else if (new->active)
496  new->to_be_disabled = true;
497  return;
498  }
499 
500  xcb_randr_get_crtc_info_cookie_t icookie;
501  icookie = xcb_randr_get_crtc_info(conn, output->crtc, cts);
502  if ((crtc = xcb_randr_get_crtc_info_reply(conn, icookie, NULL)) == NULL) {
503  DLOG("Skipping output %s: could not get CRTC (%p)\n",
504  new->name, crtc);
505  free(new);
506  return;
507  }
508 
509  bool updated = update_if_necessary(&(new->rect.x), crtc->x) |
510  update_if_necessary(&(new->rect.y), crtc->y) |
511  update_if_necessary(&(new->rect.width), crtc->width) |
512  update_if_necessary(&(new->rect.height), crtc->height);
513  free(crtc);
514  new->active = (new->rect.width != 0 && new->rect.height != 0);
515  if (!new->active) {
516  DLOG("width/height 0/0, disabling output\n");
517  return;
518  }
519 
520  DLOG("mode: %dx%d+%d+%d\n", new->rect.width, new->rect.height,
521  new->rect.x, new->rect.y);
522 
523  /* If we don’t need to change an existing output or if the output
524  * does not exist in the first place, the case is simple: we either
525  * need to insert the new output or we are done. */
526  if (!updated || !existing) {
527  if (!existing) {
528  if (new->primary)
530  else TAILQ_INSERT_TAIL(&outputs, new, outputs);
531  }
532  return;
533  }
534 
535  new->changed = true;
536 }
537 
538 /*
539  * (Re-)queries the outputs via RandR and stores them in the list of outputs.
540  *
541  */
543  Output *output, *other, *first;
544  xcb_randr_get_output_primary_cookie_t pcookie;
545  xcb_randr_get_screen_resources_current_cookie_t rcookie;
546  resources_reply *res;
547 
548  /* timestamp of the configuration so that we get consistent replies to all
549  * requests (if the configuration changes between our different calls) */
550  xcb_timestamp_t cts;
551 
552  /* an output is VGA-1, LVDS-1, etc. (usually physical video outputs) */
553  xcb_randr_output_t *randr_outputs;
554 
555  if (randr_disabled)
556  return;
557 
558  /* Get screen resources (primary output, crtcs, outputs, modes) */
559  rcookie = xcb_randr_get_screen_resources_current(conn, root);
560  pcookie = xcb_randr_get_output_primary(conn, root);
561 
562  if ((primary = xcb_randr_get_output_primary_reply(conn, pcookie, NULL)) == NULL)
563  ELOG("Could not get RandR primary output\n");
564  else DLOG("primary output is %08x\n", primary->output);
565  if ((res = xcb_randr_get_screen_resources_current_reply(conn, rcookie, NULL)) == NULL) {
567  return;
568  }
569  cts = res->config_timestamp;
570 
571  int len = xcb_randr_get_screen_resources_current_outputs_length(res);
572  randr_outputs = xcb_randr_get_screen_resources_current_outputs(res);
573 
574  /* Request information for each output */
575  xcb_randr_get_output_info_cookie_t ocookie[len];
576  for (int i = 0; i < len; i++)
577  ocookie[i] = xcb_randr_get_output_info(conn, randr_outputs[i], cts);
578 
579  /* Loop through all outputs available for this X11 screen */
580  for (int i = 0; i < len; i++) {
581  xcb_randr_get_output_info_reply_t *output;
582 
583  if ((output = xcb_randr_get_output_info_reply(conn, ocookie[i], NULL)) == NULL)
584  continue;
585 
586  handle_output(conn, randr_outputs[i], output, cts, res);
587  free(output);
588  }
589 
590  /* Check for clones, disable the clones and reduce the mode to the
591  * lowest common mode */
592  TAILQ_FOREACH(output, &outputs, outputs) {
593  if (!output->active || output->to_be_disabled)
594  continue;
595  DLOG("output %p / %s, position (%d, %d), checking for clones\n",
596  output, output->name, output->rect.x, output->rect.y);
597 
598  for (other = output;
599  other != TAILQ_END(&outputs);
600  other = TAILQ_NEXT(other, outputs)) {
601  if (other == output || !other->active || other->to_be_disabled)
602  continue;
603 
604  if (other->rect.x != output->rect.x ||
605  other->rect.y != output->rect.y)
606  continue;
607 
608  DLOG("output %p has the same position, his mode = %d x %d\n",
609  other, other->rect.width, other->rect.height);
610  uint32_t width = min(other->rect.width, output->rect.width);
611  uint32_t height = min(other->rect.height, output->rect.height);
612 
613  if (update_if_necessary(&(output->rect.width), width) |
614  update_if_necessary(&(output->rect.height), height))
615  output->changed = true;
616 
617  update_if_necessary(&(other->rect.width), width);
618  update_if_necessary(&(other->rect.height), height);
619 
620  DLOG("disabling output %p (%s)\n", other, other->name);
621  other->to_be_disabled = true;
622 
623  DLOG("new output mode %d x %d, other mode %d x %d\n",
624  output->rect.width, output->rect.height,
625  other->rect.width, other->rect.height);
626  }
627  }
628 
629  /* Ensure that all outputs which are active also have a con. This is
630  * necessary because in the next step, a clone might get disabled. Example:
631  * LVDS1 active, VGA1 gets activated as a clone of LVDS1 (has no con).
632  * LVDS1 gets disabled. */
633  TAILQ_FOREACH(output, &outputs, outputs) {
634  if (output->active && output->con == NULL) {
635  DLOG("Need to initialize a Con for output %s\n", output->name);
636  output_init_con(output);
637  output->changed = false;
638  }
639  }
640 
641  /* Handle outputs which have a new mode or are disabled now (either
642  * because the user disabled them or because they are clones) */
643  TAILQ_FOREACH(output, &outputs, outputs) {
644  if (output->to_be_disabled) {
645  output->active = false;
646  DLOG("Output %s disabled, re-assigning workspaces/docks\n", output->name);
647 
648  if ((first = get_first_output()) == NULL)
649  die("No usable outputs available\n");
650 
651  /* TODO: refactor the following code into a nice function. maybe
652  * use an on_destroy callback which is implement differently for
653  * different container types (CT_CONTENT vs. CT_DOCKAREA)? */
654  Con *first_content = output_get_content(first->con);
655 
656  if (output->con != NULL) {
657  /* We need to move the workspaces from the disappearing output to the first output */
658  /* 1: Get the con to focus next, if the disappearing ws is focused */
659  Con *next = NULL;
660  if (TAILQ_FIRST(&(croot->focus_head)) == output->con) {
661  DLOG("This output (%p) was focused! Getting next\n", output->con);
662  next = focused;
663  DLOG("next = %p\n", next);
664  }
665 
666  /* 2: iterate through workspaces and re-assign them, fixing the coordinates
667  * of floating containers as we go */
668  Con *current;
669  Con *old_content = output_get_content(output->con);
670  while (!TAILQ_EMPTY(&(old_content->nodes_head))) {
671  current = TAILQ_FIRST(&(old_content->nodes_head));
672  if (current != next && TAILQ_EMPTY(&(current->focus_head))) {
673  /* the workspace is empty and not focused, get rid of it */
674  DLOG("Getting rid of current = %p / %s (empty, unfocused)\n", current, current->name);
675  tree_close(current, DONT_KILL_WINDOW, false, false);
676  continue;
677  }
678  DLOG("Detaching current = %p / %s\n", current, current->name);
679  con_detach(current);
680  DLOG("Re-attaching current = %p / %s\n", current, current->name);
681  con_attach(current, first_content, false);
682  DLOG("Fixing the coordinates of floating containers\n");
683  Con *floating_con;
684  TAILQ_FOREACH(floating_con, &(current->floating_head), floating_windows)
685  floating_fix_coordinates(floating_con, &(old_content->rect), &(first_content->rect));
686  DLOG("Done, next\n");
687  }
688  DLOG("re-attached all workspaces\n");
689 
690  if (next) {
691  DLOG("now focusing next = %p\n", next);
692  con_focus(next);
694  }
695 
696  /* 3: move the dock clients to the first output */
697  Con *child;
698  TAILQ_FOREACH(child, &(output->con->nodes_head), nodes) {
699  if (child->type != CT_DOCKAREA)
700  continue;
701  DLOG("Handling dock con %p\n", child);
702  Con *dock;
703  while (!TAILQ_EMPTY(&(child->nodes_head))) {
704  dock = TAILQ_FIRST(&(child->nodes_head));
705  Con *nc;
706  Match *match;
707  nc = con_for_window(first->con, dock->window, &match);
708  DLOG("Moving dock client %p to nc %p\n", dock, nc);
709  con_detach(dock);
710  DLOG("Re-attaching\n");
711  con_attach(dock, nc, false);
712  DLOG("Done\n");
713  }
714  }
715 
716  DLOG("destroying disappearing con %p\n", output->con);
717  tree_close(output->con, DONT_KILL_WINDOW, true, false);
718  DLOG("Done. Should be fine now\n");
719  output->con = NULL;
720  }
721 
722  output->to_be_disabled = false;
723  output->changed = false;
724  }
725 
726  if (output->changed) {
727  output_change_mode(conn, output);
728  output->changed = false;
729  }
730  }
731 
732  if (TAILQ_EMPTY(&outputs)) {
733  ELOG("No outputs found via RandR, disabling\n");
735  }
736 
737  /* Just go through each active output and assign one workspace */
738  TAILQ_FOREACH(output, &outputs, outputs) {
739  if (!output->active)
740  continue;
741  Con *content = output_get_content(output->con);
742  if (!TAILQ_EMPTY(&(content->nodes_head)))
743  continue;
744  DLOG("Should add ws for output %s\n", output->name);
745  init_ws_for_output(output, content);
746  }
747 
748  /* Focus the primary screen, if possible */
749  TAILQ_FOREACH(output, &outputs, outputs) {
750  if (!output->primary || !output->con)
751  continue;
752 
753  DLOG("Focusing primary output %s\n", output->name);
755  }
756 
757  /* render_layout flushes */
758  tree_render();
759 
760  FREE(res);
761  FREE(primary);
762 }
763 
764 /*
765  * We have just established a connection to the X server and need the initial
766  * XRandR information to setup workspaces for each screen.
767  *
768  */
769 void randr_init(int *event_base) {
770  const xcb_query_extension_reply_t *extreply;
771 
772  extreply = xcb_get_extension_data(conn, &xcb_randr_id);
773  if (!extreply->present) {
775  return;
776  } else randr_query_outputs();
777 
778  if (event_base != NULL)
779  *event_base = extreply->first_event;
780 
781  xcb_randr_select_input(conn, root,
782  XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE |
783  XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE |
784  XCB_RANDR_NOTIFY_MASK_CRTC_CHANGE |
785  XCB_RANDR_NOTIFY_MASK_OUTPUT_PROPERTY);
786 
787  xcb_flush(conn);
788 }