2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
7 * For more information on RandR, please see the X.org RandR specification at
8 * https://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt
9 * (take your time to read it completely, it answers all questions).
15 #include <xcb/randr.h>
17 /* Pointer to the result of the query for primary output */
18 xcb_randr_get_output_primary_reply_t *primary;
20 /* Stores all outputs available in your current session. */
21 struct outputs_head outputs = TAILQ_HEAD_INITIALIZER(outputs);
23 /* This is the output covering the root window */
24 static Output *root_output;
25 static bool has_randr_1_5 = false;
28 * Get a specific output by its internal X11 id. Used by randr_query_outputs
29 * to check if the output is new (only in the first scan) or if we are
33 static Output *get_output_by_id(xcb_randr_output_t id) {
35 TAILQ_FOREACH(output, &outputs, outputs)
43 * Returns the output with the given name or NULL.
44 * If require_active is true, only active outputs are considered.
47 Output *get_output_by_name(const char *name, const bool require_active) {
49 bool get_primary = (strcasecmp("primary", name) == 0);
50 TAILQ_FOREACH(output, &outputs, outputs) {
51 if (output->primary && get_primary) {
54 if (require_active && !output->active) {
57 struct output_name *output_name;
58 SLIST_FOREACH(output_name, &output->names_head, names) {
59 if (strcasecmp(output_name->name, name) == 0) {
69 * Returns the first output which is active.
72 Output *get_first_output(void) {
75 TAILQ_FOREACH(output, &outputs, outputs)
79 die("No usable outputs available.\n");
83 * Check whether there are any active outputs (excluding the root output).
86 static bool any_randr_output_active(void) {
89 TAILQ_FOREACH(output, &outputs, outputs) {
90 if (output != root_output && !output->to_be_disabled && output->active)
98 * Returns the active (!) output which contains the coordinates x, y or NULL
99 * if there is no output which contains these coordinates.
102 Output *get_output_containing(unsigned int x, unsigned int y) {
104 TAILQ_FOREACH(output, &outputs, outputs) {
107 DLOG("comparing x=%d y=%d with x=%d and y=%d width %d height %d\n",
108 x, y, output->rect.x, output->rect.y, output->rect.width, output->rect.height);
109 if (x >= output->rect.x && x < (output->rect.x + output->rect.width) &&
110 y >= output->rect.y && y < (output->rect.y + output->rect.height))
118 * Returns the active output which contains the midpoint of the given rect. If
119 * such an output doesn't exist, returns the output which contains most of the
120 * rectangle or NULL if there is no output which intersects with it.
123 Output *get_output_from_rect(Rect rect) {
124 unsigned int mid_x = rect.x + rect.width / 2;
125 unsigned int mid_y = rect.y + rect.height / 2;
126 Output *output = get_output_containing(mid_x, mid_y);
128 return output ? output : output_containing_rect(rect);
132 * Returns the active output which spans exactly the area specified by
133 * rect or NULL if there is no output like this.
136 Output *get_output_with_dimensions(Rect rect) {
138 TAILQ_FOREACH(output, &outputs, outputs) {
141 DLOG("comparing x=%d y=%d %dx%d with x=%d and y=%d %dx%d\n",
142 rect.x, rect.y, rect.width, rect.height,
143 output->rect.x, output->rect.y, output->rect.width, output->rect.height);
144 if (rect.x == output->rect.x && rect.width == output->rect.width &&
145 rect.y == output->rect.y && rect.height == output->rect.height)
153 * In output_containing_rect, we check if any active output contains part of the container.
154 * We do this by checking if the output rect is intersected by the Rect.
155 * This is the 2-dimensional counterpart of get_output_containing.
156 * Returns the output with the maximum intersecting area.
159 Output *output_containing_rect(Rect rect) {
161 int lx = rect.x, uy = rect.y;
162 int rx = rect.x + rect.width, by = rect.y + rect.height;
164 Output *result = NULL;
165 TAILQ_FOREACH(output, &outputs, outputs) {
168 int lx_o = (int)output->rect.x, uy_o = (int)output->rect.y;
169 int rx_o = (int)(output->rect.x + output->rect.width), by_o = (int)(output->rect.y + output->rect.height);
170 DLOG("comparing x=%d y=%d with x=%d and y=%d width %d height %d\n",
171 rect.x, rect.y, output->rect.x, output->rect.y, output->rect.width, output->rect.height);
172 int left = max(lx, lx_o);
173 int right = min(rx, rx_o);
174 int bottom = min(by, by_o);
175 int top = max(uy, uy_o);
176 if (left < right && bottom > top) {
177 long area = (right - left) * (bottom - top);
178 if (area > max_area) {
187 * Like get_output_next with close_far == CLOSEST_OUTPUT, but wraps.
189 * For example if get_output_next(D_DOWN, x, FARTHEST_OUTPUT) = NULL, then
190 * get_output_next_wrap(D_DOWN, x) will return the topmost output.
192 * This function always returns a output: if no active outputs can be found,
193 * current itself is returned.
196 Output *get_output_next_wrap(direction_t direction, Output *current) {
197 Output *best = get_output_next(direction, current, CLOSEST_OUTPUT);
198 /* If no output can be found, wrap */
200 direction_t opposite;
201 if (direction == D_RIGHT)
203 else if (direction == D_LEFT)
205 else if (direction == D_DOWN)
209 best = get_output_next(opposite, current, FARTHEST_OUTPUT);
213 DLOG("current = %s, best = %s\n", output_primary_name(current), output_primary_name(best));
218 * Gets the output which is the next one in the given direction.
220 * If close_far == CLOSEST_OUTPUT, then the output next to the current one will
221 * selected. If close_far == FARTHEST_OUTPUT, the output which is the last one
222 * in the given direction will be selected.
224 * NULL will be returned when no active outputs are present in the direction
225 * specified (note that “current” counts as such an output).
228 Output *get_output_next(direction_t direction, Output *current, output_close_far_t close_far) {
229 Rect *cur = &(current->rect),
233 TAILQ_FOREACH(output, &outputs, outputs) {
237 other = &(output->rect);
239 if ((direction == D_RIGHT && other->x > cur->x) ||
240 (direction == D_LEFT && other->x < cur->x)) {
241 /* Skip the output when it doesn’t overlap the other one’s y
242 * coordinate at all. */
243 if ((other->y + other->height) <= cur->y ||
244 (cur->y + cur->height) <= other->y)
246 } else if ((direction == D_DOWN && other->y > cur->y) ||
247 (direction == D_UP && other->y < cur->y)) {
248 /* Skip the output when it doesn’t overlap the other one’s x
249 * coordinate at all. */
250 if ((other->x + other->width) <= cur->x ||
251 (cur->x + cur->width) <= other->x)
256 /* No candidate yet? Start with this one. */
262 if (close_far == CLOSEST_OUTPUT) {
263 /* Is this output better (closer to the current output) than our
264 * current best bet? */
265 if ((direction == D_RIGHT && other->x < best->rect.x) ||
266 (direction == D_LEFT && other->x > best->rect.x) ||
267 (direction == D_DOWN && other->y < best->rect.y) ||
268 (direction == D_UP && other->y > best->rect.y)) {
273 /* Is this output better (farther to the current output) than our
274 * current best bet? */
275 if ((direction == D_RIGHT && other->x > best->rect.x) ||
276 (direction == D_LEFT && other->x < best->rect.x) ||
277 (direction == D_DOWN && other->y > best->rect.y) ||
278 (direction == D_UP && other->y < best->rect.y)) {
285 DLOG("current = %s, best = %s\n", output_primary_name(current), (best ? output_primary_name(best) : "NULL"));
290 * Creates an output covering the root window.
293 Output *create_root_output(xcb_connection_t *conn) {
294 Output *s = scalloc(1, sizeof(Output));
299 s->rect.width = root_screen->width_in_pixels;
300 s->rect.height = root_screen->height_in_pixels;
302 struct output_name *output_name = scalloc(1, sizeof(struct output_name));
303 output_name->name = "xroot-0";
304 SLIST_INIT(&s->names_head);
305 SLIST_INSERT_HEAD(&s->names_head, output_name, names);
311 * Initializes a CT_OUTPUT Con (searches existing ones from inplace restart
312 * before) to use for the given Output.
315 void output_init_con(Output *output) {
316 Con *con = NULL, *current;
319 DLOG("init_con for output %s\n", output_primary_name(output));
321 /* Search for a Con with that name directly below the root node. There
322 * might be one from a restored layout. */
323 TAILQ_FOREACH(current, &(croot->nodes_head), nodes) {
324 if (strcmp(current->name, output_primary_name(output)) != 0)
329 DLOG("Using existing con %p / %s\n", con, con->name);
334 con = con_new(croot, NULL);
336 con->name = sstrdup(output_primary_name(output));
337 con->type = CT_OUTPUT;
338 con->layout = L_OUTPUT;
339 con_fix_percent(croot);
341 con->rect = output->rect;
345 sasprintf(&name, "[i3 con] output %s", con->name);
346 x_set_name(con, name);
350 DLOG("Not adding workspace, this was a reused con\n");
354 DLOG("Changing layout, adding top/bottom dockarea\n");
355 Con *topdock = con_new(NULL, NULL);
356 topdock->type = CT_DOCKAREA;
357 topdock->layout = L_DOCKAREA;
358 /* this container swallows dock clients */
359 Match *match = scalloc(1, sizeof(Match));
361 match->dock = M_DOCK_TOP;
362 match->insert_where = M_BELOW;
363 TAILQ_INSERT_TAIL(&(topdock->swallow_head), match, matches);
366 topdock->name = sstrdup("topdock");
368 sasprintf(&name, "[i3 con] top dockarea %s", con->name);
369 x_set_name(topdock, name);
372 con_attach(topdock, con, false);
374 /* content container */
376 DLOG("adding main content container\n");
377 Con *content = con_new(NULL, NULL);
378 content->type = CT_CON;
379 content->layout = L_SPLITH;
381 content->name = sstrdup("content");
383 sasprintf(&name, "[i3 con] content %s", con->name);
384 x_set_name(content, name);
386 con_attach(content, con, false);
388 /* bottom dock container */
389 Con *bottomdock = con_new(NULL, NULL);
390 bottomdock->type = CT_DOCKAREA;
391 bottomdock->layout = L_DOCKAREA;
392 /* this container swallows dock clients */
393 match = scalloc(1, sizeof(Match));
395 match->dock = M_DOCK_BOTTOM;
396 match->insert_where = M_BELOW;
397 TAILQ_INSERT_TAIL(&(bottomdock->swallow_head), match, matches);
399 FREE(bottomdock->name);
400 bottomdock->name = sstrdup("bottomdock");
402 sasprintf(&name, "[i3 con] bottom dockarea %s", con->name);
403 x_set_name(bottomdock, name);
406 con_attach(bottomdock, con, false);
408 /* Change focus to the content container */
409 TAILQ_REMOVE(&(con->focus_head), content, focused);
410 TAILQ_INSERT_HEAD(&(con->focus_head), content, focused);
414 * Initializes at least one workspace for this output, trying the following
415 * steps until there is at least one workspace:
417 * • Move existing workspaces, which are assigned to be on the given output, to
419 * • Create the first assigned workspace for this output.
420 * • Create the first unused workspace.
423 void init_ws_for_output(Output *output, Con *content) {
424 /* go through all assignments and move the existing workspaces to this output */
425 struct Workspace_Assignment *assignment;
426 TAILQ_FOREACH(assignment, &ws_assignments, ws_assignments) {
427 if (!output_triggers_assignment(output, assignment)) {
430 Con *workspace = get_existing_workspace_by_name(assignment->name);
431 if (workspace == NULL)
434 /* check that this workspace is not already attached (that means the
435 * user configured this assignment twice) */
436 Con *workspace_out = con_get_output(workspace);
437 if (workspace_out == output->con) {
438 LOG("Workspace \"%s\" assigned to output \"%s\", but it is already "
439 "there. Do you have two assignment directives for the same "
440 "workspace in your configuration file?\n",
441 workspace->name, output_primary_name(output));
445 /* if so, move it over */
446 LOG("Moving workspace \"%s\" from output \"%s\" to \"%s\" due to assignment\n",
447 workspace->name, workspace_out->name, output_primary_name(output));
449 /* if the workspace is currently visible on that output, we need to
450 * switch to a different workspace - otherwise the output would end up
451 * with no active workspace */
452 bool visible = workspace_is_visible(workspace);
453 Con *previous = NULL;
454 if (visible && (previous = TAILQ_NEXT(workspace, focused))) {
455 LOG("Switching to previously used workspace \"%s\" on output \"%s\"\n",
456 previous->name, workspace_out->name);
457 workspace_show(previous);
460 /* Render the output on which the workspace was to get correct Rects.
461 * Then, we need to work with the "content" container, since we cannot
462 * be sure that the workspace itself was rendered at all (in case it’s
463 * invisible, it won’t be rendered). */
464 render_con(workspace_out, false);
465 Con *ws_out_content = output_get_content(workspace_out);
468 TAILQ_FOREACH(floating_con, &(workspace->floating_head), floating_windows)
469 /* NB: We use output->con here because content is not yet rendered,
470 * so it has a rect of {0, 0, 0, 0}. */
471 floating_fix_coordinates(floating_con, &(ws_out_content->rect), &(output->con->rect));
473 con_detach(workspace);
474 con_attach(workspace, content, false);
476 /* In case the workspace we just moved was visible but there was no
477 * other workspace to switch to, we need to initialize the source
479 if (visible && previous == NULL) {
480 LOG("There is no workspace left on \"%s\", re-initializing\n",
481 workspace_out->name);
482 init_ws_for_output(get_output_by_name(workspace_out->name, true),
483 output_get_content(workspace_out));
484 DLOG("Done re-initializing, continuing with \"%s\"\n", output_primary_name(output));
488 /* if a workspace exists, we are done now */
489 if (!TAILQ_EMPTY(&(content->nodes_head))) {
490 /* ensure that one of the workspaces is actually visible (in fullscreen
491 * mode), if they were invisible before, this might not be the case. */
493 GREP_FIRST(visible, content, child->fullscreen_mode == CF_OUTPUT);
495 visible = TAILQ_FIRST(&(content->nodes_head));
497 workspace_show(visible);
502 /* otherwise, we create the first assigned ws for this output */
503 TAILQ_FOREACH(assignment, &ws_assignments, ws_assignments) {
504 if (!output_triggers_assignment(output, assignment)) {
508 LOG("Initializing first assigned workspace \"%s\" for output \"%s\"\n",
509 assignment->name, assignment->output);
511 workspace_show_by_name(assignment->name);
515 /* if there is still no workspace, we create the first free workspace */
516 DLOG("Now adding a workspace\n");
517 Con *ws = create_workspace_on_output(output, content);
519 /* TODO: Set focus in main.c */
524 * This function needs to be called when changing the mode of an output when
525 * it already has some workspaces (or a bar window) assigned.
527 * It reconfigures the bar window for the new mode, copies the new rect into
528 * each workspace on this output and forces all windows on the affected
529 * workspaces to be reconfigured.
531 * It is necessary to call render_layout() afterwards.
534 static void output_change_mode(xcb_connection_t *conn, Output *output) {
535 DLOG("Output mode changed, updating rect\n");
536 assert(output->con != NULL);
537 output->con->rect = output->rect;
539 Con *content, *workspace, *child;
541 /* Point content to the container of the workspaces */
542 content = output_get_content(output->con);
544 /* Fix the position of all floating windows on this output.
545 * The 'rect' of each workspace will be updated in src/render.c. */
546 TAILQ_FOREACH(workspace, &(content->nodes_head), nodes) {
547 TAILQ_FOREACH(child, &(workspace->floating_head), floating_windows) {
548 floating_fix_coordinates(child, &(workspace->rect), &(output->con->rect));
552 /* If default_orientation is NO_ORIENTATION, we change the orientation of
553 * the workspaces and their children depending on output resolution. This is
554 * only done for workspaces with maximum one child. */
555 if (config.default_orientation == NO_ORIENTATION) {
556 TAILQ_FOREACH(workspace, &(content->nodes_head), nodes) {
557 /* Workspaces with more than one child are left untouched because
558 * we do not want to change an existing layout. */
559 if (con_num_children(workspace) > 1)
562 workspace->layout = (output->rect.height > output->rect.width) ? L_SPLITV : L_SPLITH;
563 DLOG("Setting workspace [%d,%s]'s layout to %d.\n", workspace->num, workspace->name, workspace->layout);
564 if ((child = TAILQ_FIRST(&(workspace->nodes_head)))) {
565 if (child->layout == L_SPLITV || child->layout == L_SPLITH)
566 child->layout = workspace->layout;
567 DLOG("Setting child [%d,%s]'s layout to %d.\n", child->num, child->name, child->layout);
574 * randr_query_outputs_15 uses RandR ≥ 1.5 to update outputs.
577 static bool randr_query_outputs_15(void) {
578 #if XCB_RANDR_MINOR_VERSION < 5
581 /* RandR 1.5 available at compile-time, i.e. libxcb is new enough */
582 if (!has_randr_1_5) {
585 /* RandR 1.5 available at run-time (supported by the server and not
586 * disabled by the user) */
587 DLOG("Querying outputs using RandR 1.5\n");
588 xcb_generic_error_t *err;
589 xcb_randr_get_monitors_reply_t *monitors =
590 xcb_randr_get_monitors_reply(
591 conn, xcb_randr_get_monitors(conn, root, true), &err);
593 ELOG("Could not get RandR monitors: X11 error code %d\n", err->error_code);
595 /* Fall back to RandR ≤ 1.4 */
599 /* Mark all outputs as to_be_disabled, since xcb_randr_get_monitors() will
600 * only return active outputs. */
602 TAILQ_FOREACH(output, &outputs, outputs) {
603 if (output != root_output) {
604 output->to_be_disabled = true;
608 DLOG("%d RandR monitors found (timestamp %d)\n",
609 xcb_randr_get_monitors_monitors_length(monitors),
610 monitors->timestamp);
612 xcb_randr_monitor_info_iterator_t iter;
613 for (iter = xcb_randr_get_monitors_monitors_iterator(monitors);
615 xcb_randr_monitor_info_next(&iter)) {
616 const xcb_randr_monitor_info_t *monitor_info = iter.data;
617 xcb_get_atom_name_reply_t *atom_reply =
618 xcb_get_atom_name_reply(
619 conn, xcb_get_atom_name(conn, monitor_info->name), &err);
621 ELOG("Could not get RandR monitor name: X11 error code %d\n", err->error_code);
626 sasprintf(&name, "%.*s",
627 xcb_get_atom_name_name_length(atom_reply),
628 xcb_get_atom_name_name(atom_reply));
631 Output *new = get_output_by_name(name, false);
633 new = scalloc(1, sizeof(Output));
635 SLIST_INIT(&new->names_head);
637 /* Register associated output names in addition to the monitor name */
638 xcb_randr_output_t *randr_outputs = xcb_randr_monitor_info_outputs(monitor_info);
639 int randr_output_len = xcb_randr_monitor_info_outputs_length(monitor_info);
640 for (int i = 0; i < randr_output_len; i++) {
641 xcb_randr_output_t randr_output = randr_outputs[i];
643 xcb_randr_get_output_info_reply_t *info =
644 xcb_randr_get_output_info_reply(conn,
645 xcb_randr_get_output_info(conn, randr_output, monitors->timestamp),
648 if (info != NULL && info->crtc != XCB_NONE) {
650 sasprintf(&oname, "%.*s",
651 xcb_randr_get_output_info_name_length(info),
652 xcb_randr_get_output_info_name(info));
654 if (strcmp(name, oname) != 0) {
655 struct output_name *output_name = scalloc(1, sizeof(struct output_name));
656 output_name->name = sstrdup(oname);
657 SLIST_INSERT_HEAD(&new->names_head, output_name, names);
665 /* Insert the monitor name last, so that it's used as the primary name */
666 struct output_name *output_name = scalloc(1, sizeof(struct output_name));
667 output_name->name = sstrdup(name);
668 SLIST_INSERT_HEAD(&new->names_head, output_name, names);
670 if (monitor_info->primary) {
671 TAILQ_INSERT_HEAD(&outputs, new, outputs);
673 TAILQ_INSERT_TAIL(&outputs, new, outputs);
676 /* We specified get_active == true in xcb_randr_get_monitors(), so we
677 * will only receive active outputs. */
679 new->to_be_disabled = false;
681 new->primary = monitor_info->primary;
684 update_if_necessary(&(new->rect.x), monitor_info->x) |
685 update_if_necessary(&(new->rect.y), monitor_info->y) |
686 update_if_necessary(&(new->rect.width), monitor_info->width) |
687 update_if_necessary(&(new->rect.height), monitor_info->height);
689 DLOG("name %s, x %d, y %d, width %d px, height %d px, width %d mm, height %d mm, primary %d, automatic %d\n",
691 monitor_info->x, monitor_info->y, monitor_info->width, monitor_info->height,
692 monitor_info->width_in_millimeters, monitor_info->height_in_millimeters,
693 monitor_info->primary, monitor_info->automatic);
702 * Gets called by randr_query_outputs_14() for each output. The function adds
703 * new outputs to the list of outputs, checks if the mode of existing outputs
704 * has been changed or if an existing output has been disabled. It will then
705 * change either the "changed" or the "to_be_deleted" flag of the output, if
709 static void handle_output(xcb_connection_t *conn, xcb_randr_output_t id,
710 xcb_randr_get_output_info_reply_t *output,
712 xcb_randr_get_screen_resources_current_reply_t *res) {
713 /* each CRT controller has a position in which we are interested in */
714 xcb_randr_get_crtc_info_reply_t *crtc;
716 Output *new = get_output_by_id(id);
717 bool existing = (new != NULL);
719 new = scalloc(1, sizeof(Output));
720 SLIST_INIT(&new->names_head);
723 new->primary = (primary && primary->output == id);
724 while (!SLIST_EMPTY(&new->names_head)) {
725 FREE(SLIST_FIRST(&new->names_head)->name);
726 struct output_name *old_head = SLIST_FIRST(&new->names_head);
727 SLIST_REMOVE_HEAD(&new->names_head, names);
730 struct output_name *output_name = scalloc(1, sizeof(struct output_name));
731 sasprintf(&output_name->name, "%.*s",
732 xcb_randr_get_output_info_name_length(output),
733 xcb_randr_get_output_info_name(output));
734 SLIST_INSERT_HEAD(&new->names_head, output_name, names);
736 DLOG("found output with name %s\n", output_primary_name(new));
738 /* Even if no CRTC is used at the moment, we store the output so that
739 * we do not need to change the list ever again (we only update the
741 if (output->crtc == XCB_NONE) {
744 TAILQ_INSERT_HEAD(&outputs, new, outputs);
746 TAILQ_INSERT_TAIL(&outputs, new, outputs);
747 } else if (new->active)
748 new->to_be_disabled = true;
752 xcb_randr_get_crtc_info_cookie_t icookie;
753 icookie = xcb_randr_get_crtc_info(conn, output->crtc, cts);
754 if ((crtc = xcb_randr_get_crtc_info_reply(conn, icookie, NULL)) == NULL) {
755 DLOG("Skipping output %s: could not get CRTC (%p)\n",
756 output_primary_name(new), crtc);
761 bool updated = update_if_necessary(&(new->rect.x), crtc->x) |
762 update_if_necessary(&(new->rect.y), crtc->y) |
763 update_if_necessary(&(new->rect.width), crtc->width) |
764 update_if_necessary(&(new->rect.height), crtc->height);
766 new->active = (new->rect.width != 0 && new->rect.height != 0);
768 DLOG("width/height 0/0, disabling output\n");
772 DLOG("mode: %dx%d+%d+%d\n", new->rect.width, new->rect.height,
773 new->rect.x, new->rect.y);
775 /* If we don’t need to change an existing output or if the output
776 * does not exist in the first place, the case is simple: we either
777 * need to insert the new output or we are done. */
778 if (!updated || !existing) {
781 TAILQ_INSERT_HEAD(&outputs, new, outputs);
783 TAILQ_INSERT_TAIL(&outputs, new, outputs);
792 * randr_query_outputs_14 uses RandR ≤ 1.4 to update outputs.
795 static void randr_query_outputs_14(void) {
796 DLOG("Querying outputs using RandR ≤ 1.4\n");
798 /* Get screen resources (primary output, crtcs, outputs, modes) */
799 xcb_randr_get_screen_resources_current_cookie_t rcookie;
800 rcookie = xcb_randr_get_screen_resources_current(conn, root);
801 xcb_randr_get_output_primary_cookie_t pcookie;
802 pcookie = xcb_randr_get_output_primary(conn, root);
804 if ((primary = xcb_randr_get_output_primary_reply(conn, pcookie, NULL)) == NULL)
805 ELOG("Could not get RandR primary output\n");
807 DLOG("primary output is %08x\n", primary->output);
809 xcb_randr_get_screen_resources_current_reply_t *res =
810 xcb_randr_get_screen_resources_current_reply(conn, rcookie, NULL);
812 ELOG("Could not query screen resources.\n");
816 /* timestamp of the configuration so that we get consistent replies to all
817 * requests (if the configuration changes between our different calls) */
818 const xcb_timestamp_t cts = res->config_timestamp;
820 const int len = xcb_randr_get_screen_resources_current_outputs_length(res);
822 /* an output is VGA-1, LVDS-1, etc. (usually physical video outputs) */
823 xcb_randr_output_t *randr_outputs = xcb_randr_get_screen_resources_current_outputs(res);
825 /* Request information for each output */
826 xcb_randr_get_output_info_cookie_t ocookie[len];
827 for (int i = 0; i < len; i++)
828 ocookie[i] = xcb_randr_get_output_info(conn, randr_outputs[i], cts);
830 /* Loop through all outputs available for this X11 screen */
831 for (int i = 0; i < len; i++) {
832 xcb_randr_get_output_info_reply_t *output;
834 if ((output = xcb_randr_get_output_info_reply(conn, ocookie[i], NULL)) == NULL)
837 handle_output(conn, randr_outputs[i], output, cts, res);
845 * (Re-)queries the outputs via RandR and stores them in the list of outputs.
847 * If no outputs are found use the root window.
850 void randr_query_outputs(void) {
851 Output *output, *other;
853 if (!randr_query_outputs_15()) {
854 randr_query_outputs_14();
857 /* If there's no randr output, enable the output covering the root window. */
858 if (any_randr_output_active()) {
859 DLOG("Active RandR output found. Disabling root output.\n");
860 if (root_output && root_output->active) {
861 root_output->to_be_disabled = true;
864 DLOG("No active RandR output found. Enabling root output.\n");
865 root_output->active = true;
868 /* Check for clones, disable the clones and reduce the mode to the
869 * lowest common mode */
870 TAILQ_FOREACH(output, &outputs, outputs) {
871 if (!output->active || output->to_be_disabled)
873 DLOG("output %p / %s, position (%d, %d), checking for clones\n",
874 output, output_primary_name(output), output->rect.x, output->rect.y);
877 other != TAILQ_END(&outputs);
878 other = TAILQ_NEXT(other, outputs)) {
879 if (other == output || !other->active || other->to_be_disabled)
882 if (other->rect.x != output->rect.x ||
883 other->rect.y != output->rect.y)
886 DLOG("output %p has the same position, his mode = %d x %d\n",
887 other, other->rect.width, other->rect.height);
888 uint32_t width = min(other->rect.width, output->rect.width);
889 uint32_t height = min(other->rect.height, output->rect.height);
891 if (update_if_necessary(&(output->rect.width), width) |
892 update_if_necessary(&(output->rect.height), height))
893 output->changed = true;
895 update_if_necessary(&(other->rect.width), width);
896 update_if_necessary(&(other->rect.height), height);
898 DLOG("disabling output %p (%s)\n", other, output_primary_name(other));
899 other->to_be_disabled = true;
901 DLOG("new output mode %d x %d, other mode %d x %d\n",
902 output->rect.width, output->rect.height,
903 other->rect.width, other->rect.height);
907 /* Ensure that all outputs which are active also have a con. This is
908 * necessary because in the next step, a clone might get disabled. Example:
909 * LVDS1 active, VGA1 gets activated as a clone of LVDS1 (has no con).
910 * LVDS1 gets disabled. */
911 TAILQ_FOREACH(output, &outputs, outputs) {
912 if (output->active && output->con == NULL) {
913 DLOG("Need to initialize a Con for output %s\n", output_primary_name(output));
914 output_init_con(output);
915 output->changed = false;
919 /* Handle outputs which have a new mode or are disabled now (either
920 * because the user disabled them or because they are clones) */
921 TAILQ_FOREACH(output, &outputs, outputs) {
922 if (output->to_be_disabled) {
923 randr_disable_output(output);
926 if (output->changed) {
927 output_change_mode(conn, output);
928 output->changed = false;
932 /* Just go through each active output and assign one workspace */
933 TAILQ_FOREACH(output, &outputs, outputs) {
936 Con *content = output_get_content(output->con);
937 if (!TAILQ_EMPTY(&(content->nodes_head)))
939 DLOG("Should add ws for output %s\n", output_primary_name(output));
940 init_ws_for_output(output, content);
943 /* Focus the primary screen, if possible */
944 TAILQ_FOREACH(output, &outputs, outputs) {
945 if (!output->primary || !output->con)
948 DLOG("Focusing primary output %s\n", output_primary_name(output));
949 Con *content = output_get_content(output->con);
950 Con *ws = TAILQ_FIRST(&(content)->focus_head);
954 /* render_layout flushes */
961 * Disables the output and moves its content.
964 void randr_disable_output(Output *output) {
965 assert(output->to_be_disabled);
967 output->active = false;
968 DLOG("Output %s disabled, re-assigning workspaces/docks\n", output_primary_name(output));
970 Output *first = get_first_output();
972 /* TODO: refactor the following code into a nice function. maybe
973 * use an on_destroy callback which is implement differently for
974 * different container types (CT_CONTENT vs. CT_DOCKAREA)? */
975 Con *first_content = output_get_content(first->con);
977 if (output->con != NULL) {
978 /* We need to move the workspaces from the disappearing output to the first output */
979 /* 1: Get the con to focus next, if the disappearing ws is focused */
981 if (TAILQ_FIRST(&(croot->focus_head)) == output->con) {
982 DLOG("This output (%p) was focused! Getting next\n", output->con);
984 DLOG("next = %p\n", next);
987 /* 2: iterate through workspaces and re-assign them, fixing the coordinates
988 * of floating containers as we go */
990 Con *old_content = output_get_content(output->con);
991 while (!TAILQ_EMPTY(&(old_content->nodes_head))) {
992 current = TAILQ_FIRST(&(old_content->nodes_head));
993 if (current != next && TAILQ_EMPTY(&(current->focus_head))) {
994 /* the workspace is empty and not focused, get rid of it */
995 DLOG("Getting rid of current = %p / %s (empty, unfocused)\n", current, current->name);
996 tree_close_internal(current, DONT_KILL_WINDOW, false);
999 DLOG("Detaching current = %p / %s\n", current, current->name);
1000 con_detach(current);
1001 DLOG("Re-attaching current = %p / %s\n", current, current->name);
1002 con_attach(current, first_content, false);
1003 DLOG("Fixing the coordinates of floating containers\n");
1005 TAILQ_FOREACH(floating_con, &(current->floating_head), floating_windows) {
1006 floating_fix_coordinates(floating_con, &(output->con->rect), &(first->con->rect));
1008 DLOG("Done, next\n");
1010 DLOG("re-attached all workspaces\n");
1013 DLOG("now focusing next = %p\n", next);
1015 workspace_show(con_get_workspace(next));
1018 /* 3: move the dock clients to the first output */
1020 TAILQ_FOREACH(child, &(output->con->nodes_head), nodes) {
1021 if (child->type != CT_DOCKAREA)
1023 DLOG("Handling dock con %p\n", child);
1025 while (!TAILQ_EMPTY(&(child->nodes_head))) {
1026 dock = TAILQ_FIRST(&(child->nodes_head));
1029 nc = con_for_window(first->con, dock->window, &match);
1030 DLOG("Moving dock client %p to nc %p\n", dock, nc);
1032 DLOG("Re-attaching\n");
1033 con_attach(dock, nc, false);
1038 DLOG("destroying disappearing con %p\n", output->con);
1039 Con *con = output->con;
1040 /* clear the pointer before calling tree_close_internal in which the memory is freed */
1042 tree_close_internal(con, DONT_KILL_WINDOW, true);
1043 DLOG("Done. Should be fine now\n");
1046 output->to_be_disabled = false;
1047 output->changed = false;
1050 static void fallback_to_root_output(void) {
1051 root_output->active = true;
1052 output_init_con(root_output);
1053 init_ws_for_output(root_output, output_get_content(root_output->con));
1057 * We have just established a connection to the X server and need the initial
1058 * XRandR information to setup workspaces for each screen.
1061 void randr_init(int *event_base, const bool disable_randr15) {
1062 const xcb_query_extension_reply_t *extreply;
1064 root_output = create_root_output(conn);
1065 TAILQ_INSERT_TAIL(&outputs, root_output, outputs);
1067 extreply = xcb_get_extension_data(conn, &xcb_randr_id);
1068 if (!extreply->present) {
1069 DLOG("RandR is not present, activating root output.\n");
1070 fallback_to_root_output();
1074 xcb_generic_error_t *err;
1075 xcb_randr_query_version_reply_t *randr_version =
1076 xcb_randr_query_version_reply(
1077 conn, xcb_randr_query_version(conn, XCB_RANDR_MAJOR_VERSION, XCB_RANDR_MINOR_VERSION), &err);
1079 ELOG("Could not query RandR version: X11 error code %d\n", err->error_code);
1081 fallback_to_root_output();
1085 has_randr_1_5 = (randr_version->major_version >= 1) &&
1086 (randr_version->minor_version >= 5) &&
1089 free(randr_version);
1091 randr_query_outputs();
1093 if (event_base != NULL)
1094 *event_base = extreply->first_event;
1096 xcb_randr_select_input(conn, root,
1097 XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE |
1098 XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE |
1099 XCB_RANDR_NOTIFY_MASK_CRTC_CHANGE |
1100 XCB_RANDR_NOTIFY_MASK_OUTPUT_PROPERTY);