2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
6 * © 2009-2011 Michael Stapelberg and contributors
8 * See file LICENSE for license information.
10 * For more information on RandR, please see the X.org RandR specification at
11 * http://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt
12 * (take your time to read it completely, it answers all questions).
17 #include <xcb/randr.h>
21 /* While a clean namespace is usually a pretty good thing, we really need
22 * to use shorter names than the whole xcb_randr_* default names. */
23 typedef xcb_randr_get_crtc_info_reply_t crtc_info;
24 typedef xcb_randr_mode_info_t mode_info;
25 typedef xcb_randr_get_screen_resources_current_reply_t resources_reply;
27 /* Pointer to the result of the query for primary output */
28 xcb_randr_get_output_primary_reply_t *primary;
30 /* Stores all outputs available in your current session. */
31 struct outputs_head outputs = TAILQ_HEAD_INITIALIZER(outputs);
33 static bool randr_disabled = false;
36 * Get a specific output by its internal X11 id. Used by randr_query_outputs
37 * to check if the output is new (only in the first scan) or if we are
41 static Output *get_output_by_id(xcb_randr_output_t id) {
43 TAILQ_FOREACH(output, &outputs, outputs)
51 * Returns the output with the given name if it is active (!) or NULL.
54 Output *get_output_by_name(const char *name) {
56 TAILQ_FOREACH(output, &outputs, outputs)
58 strcasecmp(output->name, name) == 0)
65 * Returns the first output which is active.
68 Output *get_first_output() {
71 TAILQ_FOREACH(output, &outputs, outputs)
79 * Returns the active (!) output which contains the coordinates x, y or NULL
80 * if there is no output which contains these coordinates.
83 Output *get_output_containing(int x, int y) {
85 TAILQ_FOREACH(output, &outputs, outputs) {
88 DLOG("comparing x=%d y=%d with x=%d and y=%d width %d height %d\n",
89 x, y, output->rect.x, output->rect.y, output->rect.width, output->rect.height);
90 if (x >= output->rect.x && x < (output->rect.x + output->rect.width) &&
91 y >= output->rect.y && y < (output->rect.y + output->rect.height))
99 * Gets the output which is the last one in the given direction, for example
100 * the output on the most bottom when direction == D_DOWN, the output most
101 * right when direction == D_RIGHT and so on.
103 * This function always returns a output.
106 Output *get_output_most(direction_t direction, Output *current) {
107 Output *output, *candidate = NULL;
109 TAILQ_FOREACH(output, &outputs, outputs) {
113 /* Repeated calls of WIN determine the winner of the comparison */
114 #define WIN(variable, condition) \
115 if (variable condition) { \
116 candidate = output; \
117 position = variable; \
121 if (((direction == D_UP) || (direction == D_DOWN)) &&
122 (current->rect.x != output->rect.x))
125 if (((direction == D_LEFT) || (direction == D_RIGHT)) &&
126 (current->rect.y != output->rect.y))
131 WIN(output->rect.y, <= position);
133 WIN(output->rect.y, >= position);
135 WIN(output->rect.x, <= position);
137 WIN(output->rect.x, >= position);
141 assert(candidate != NULL);
148 * Initializes the specified output, assigning the specified workspace to it.
151 void initialize_output(xcb_connection_t *conn, Output *output, Workspace *workspace) {
152 i3Font *font = load_font(conn, config.font);
154 workspace->output = output;
155 output->current_workspace = workspace;
157 /* Copy rect for the workspace */
158 memcpy(&(workspace->rect), &(output->rect), sizeof(Rect));
160 /* Map clients on the workspace, if any */
161 workspace_map_clients(conn, workspace);
163 /* Create a bar window on each output */
164 if (!config.disable_workspace_bar) {
165 Rect bar_rect = {output->rect.x,
166 output->rect.y + output->rect.height - (font->height + 6),
167 output->rect.x + output->rect.width,
169 uint32_t mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
170 uint32_t values[] = {1, XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_BUTTON_PRESS};
171 output->bar = create_window(conn, bar_rect, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_CURSOR_LEFT_PTR, true, mask, values);
172 output->bargc = xcb_generate_id(conn);
173 xcb_create_gc(conn, output->bargc, output->bar, 0, 0);
176 SLIST_INIT(&(output->dock_clients));
178 ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"init\"}");
179 DLOG("initialized output at (%d, %d) with %d x %d\n",
180 output->rect.x, output->rect.y, output->rect.width, output->rect.height);
182 DLOG("assigning configured workspaces to this output...\n");
184 TAILQ_FOREACH(ws, workspaces, workspaces) {
187 if (ws->preferred_output == NULL ||
188 get_output_by_name(ws->preferred_output) != output)
191 DLOG("assigning ws %d\n", ws->num + 1);
192 workspace_assign_to(ws, output, true);
198 * Disables RandR support by creating exactly one output with the size of the
202 void disable_randr(xcb_connection_t *conn) {
203 xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
205 DLOG("RandR extension unusable, disabling.\n");
207 Output *s = scalloc(sizeof(Output));
212 s->rect.width = root_screen->width_in_pixels;
213 s->rect.height = root_screen->height_in_pixels;
217 TAILQ_INSERT_TAIL(&outputs, s, outputs);
219 randr_disabled = true;
223 * Initializes a CT_OUTPUT Con (searches existing ones from inplace restart
224 * before) to use for the given Output.
226 * XXX: for assignments, we probably need to move workspace creation from here
227 * to after the loop in randr_query_outputs().
230 void output_init_con(Output *output) {
231 Con *con = NULL, *current;
234 DLOG("init_con for output %s\n", output->name);
236 /* Search for a Con with that name directly below the root node. There
237 * might be one from a restored layout. */
238 TAILQ_FOREACH(current, &(croot->nodes_head), nodes) {
239 if (strcmp(current->name, output->name) != 0)
244 DLOG("Using existing con %p / %s\n", con, con->name);
249 con = con_new(croot);
251 con->name = sstrdup(output->name);
252 con->type = CT_OUTPUT;
254 con->rect = output->rect;
258 asprintf(&name, "[i3 con] output %s", con->name);
259 x_set_name(con, name);
263 DLOG("Not adding workspace, this was a reused con\n");
266 DLOG("Now adding a workspace\n");
268 /* add a workspace to this output */
269 Con *ws = con_new(NULL);
270 ws->type = CT_WORKSPACE;
272 /* get the next unused workspace number */
273 DLOG("Getting next unused workspace\n");
282 asprintf(&(ws->name), "%d", c);
285 TAILQ_FOREACH(out, &(croot->nodes_head), nodes) {
286 TAILQ_FOREACH(current, &(out->nodes_head), nodes) {
287 if (strcasecmp(current->name, ws->name) != 0)
295 DLOG("result for ws %s / %d: exists = %d\n", ws->name, c, exists);
298 con_attach(ws, con, false);
300 asprintf(&name, "[i3 con] workspace %s", ws->name);
301 x_set_name(ws, name);
304 ws->fullscreen_mode = CF_OUTPUT;
305 ws->orientation = HORIZ;
307 /* TODO: Set focus in main.c */
312 * This function needs to be called when changing the mode of an output when
313 * it already has some workspaces (or a bar window) assigned.
315 * It reconfigures the bar window for the new mode, copies the new rect into
316 * each workspace on this output and forces all windows on the affected
317 * workspaces to be reconfigured.
319 * It is necessary to call render_layout() afterwards.
322 static void output_change_mode(xcb_connection_t *conn, Output *output) {
323 //i3Font *font = load_font(conn, config.font);
325 DLOG("Output mode changed, updating rect\n");
326 assert(output->con != NULL);
327 output->con->rect = output->rect;
329 Rect bar_rect = {output->rect.x,
330 output->rect.y + output->rect.height - (font->height + 6),
331 output->rect.x + output->rect.width,
334 xcb_set_window_rect(conn, output->bar, bar_rect);
336 /* go through all workspaces and set force_reconfigure */
337 TAILQ_FOREACH(ws, workspaces, workspaces) {
338 if (ws->output != output)
341 SLIST_FOREACH(client, &(ws->focus_stack), focus_clients) {
342 client->force_reconfigure = true;
343 if (!client_is_floating(client))
345 /* For floating clients we need to translate the
346 * coordinates (old workspace to new workspace) */
347 DLOG("old: (%x, %x)\n", client->rect.x, client->rect.y);
348 client->rect.x -= ws->rect.x;
349 client->rect.y -= ws->rect.y;
350 client->rect.x += ws->output->rect.x;
351 client->rect.y += ws->output->rect.y;
352 DLOG("new: (%x, %x)\n", client->rect.x, client->rect.y);
355 /* Update dimensions from output */
356 memcpy(&(ws->rect), &(ws->output->rect), sizeof(Rect));
358 /* Update the dimensions of a fullscreen client, if any */
359 if (ws->fullscreen_client != NULL) {
360 DLOG("Updating fullscreen client size\n");
361 client = ws->fullscreen_client;
363 xcb_set_window_rect(conn, client->frame, r);
367 xcb_set_window_rect(conn, client->child, r);
374 * Gets called by randr_query_outputs() for each output. The function adds new
375 * outputs to the list of outputs, checks if the mode of existing outputs has
376 * been changed or if an existing output has been disabled. It will then change
377 * either the "changed" or the "to_be_deleted" flag of the output, if
381 static void handle_output(xcb_connection_t *conn, xcb_randr_output_t id,
382 xcb_randr_get_output_info_reply_t *output,
383 xcb_timestamp_t cts, resources_reply *res) {
384 /* each CRT controller has a position in which we are interested in */
387 Output *new = get_output_by_id(id);
388 bool existing = (new != NULL);
390 new = scalloc(sizeof(Output));
392 new->primary = (primary && primary->output == id);
394 asprintf(&new->name, "%.*s",
395 xcb_randr_get_output_info_name_length(output),
396 xcb_randr_get_output_info_name(output));
398 DLOG("found output with name %s\n", new->name);
400 /* Even if no CRTC is used at the moment, we store the output so that
401 * we do not need to change the list ever again (we only update the
403 if (output->crtc == XCB_NONE) {
406 TAILQ_INSERT_HEAD(&outputs, new, outputs);
407 else TAILQ_INSERT_TAIL(&outputs, new, outputs);
408 } else if (new->active)
409 new->to_be_disabled = true;
413 xcb_randr_get_crtc_info_cookie_t icookie;
414 icookie = xcb_randr_get_crtc_info(conn, output->crtc, cts);
415 if ((crtc = xcb_randr_get_crtc_info_reply(conn, icookie, NULL)) == NULL) {
416 DLOG("Skipping output %s: could not get CRTC (%p)\n",
422 bool updated = update_if_necessary(&(new->rect.x), crtc->x) |
423 update_if_necessary(&(new->rect.y), crtc->y) |
424 update_if_necessary(&(new->rect.width), crtc->width) |
425 update_if_necessary(&(new->rect.height), crtc->height);
427 new->active = (new->rect.width != 0 && new->rect.height != 0);
429 DLOG("width/height 0/0, disabling output\n");
433 DLOG("mode: %dx%d+%d+%d\n", new->rect.width, new->rect.height,
434 new->rect.x, new->rect.y);
436 /* If we don’t need to change an existing output or if the output
437 * does not exist in the first place, the case is simple: we either
438 * need to insert the new output or we are done. */
439 if (!updated || !existing) {
442 TAILQ_INSERT_HEAD(&outputs, new, outputs);
443 else TAILQ_INSERT_TAIL(&outputs, new, outputs);
452 * (Re-)queries the outputs via RandR and stores them in the list of outputs.
455 void randr_query_outputs() {
456 Output *output, *other, *first;
457 xcb_randr_get_output_primary_cookie_t pcookie;
458 xcb_randr_get_screen_resources_current_cookie_t rcookie;
459 resources_reply *res;
461 /* timestamp of the configuration so that we get consistent replies to all
462 * requests (if the configuration changes between our different calls) */
465 /* an output is VGA-1, LVDS-1, etc. (usually physical video outputs) */
466 xcb_randr_output_t *randr_outputs;
471 /* Get screen resources (primary output, crtcs, outputs, modes) */
472 rcookie = xcb_randr_get_screen_resources_current(conn, root);
473 pcookie = xcb_randr_get_output_primary(conn, root);
475 if ((primary = xcb_randr_get_output_primary_reply(conn, pcookie, NULL)) == NULL)
476 ELOG("Could not get RandR primary output\n");
477 else DLOG("primary output is %08x\n", primary->output);
478 if ((res = xcb_randr_get_screen_resources_current_reply(conn, rcookie, NULL)) == NULL) {
482 cts = res->config_timestamp;
484 int len = xcb_randr_get_screen_resources_current_outputs_length(res);
485 randr_outputs = xcb_randr_get_screen_resources_current_outputs(res);
487 /* Request information for each output */
488 xcb_randr_get_output_info_cookie_t ocookie[len];
489 for (int i = 0; i < len; i++)
490 ocookie[i] = xcb_randr_get_output_info(conn, randr_outputs[i], cts);
492 /* Loop through all outputs available for this X11 screen */
493 for (int i = 0; i < len; i++) {
494 xcb_randr_get_output_info_reply_t *output;
496 if ((output = xcb_randr_get_output_info_reply(conn, ocookie[i], NULL)) == NULL)
499 handle_output(conn, randr_outputs[i], output, cts, res);
503 /* Check for clones, disable the clones and reduce the mode to the
504 * lowest common mode */
505 TAILQ_FOREACH(output, &outputs, outputs) {
506 if (!output->active || output->to_be_disabled)
508 DLOG("output %p / %s, position (%d, %d), checking for clones\n",
509 output, output->name, output->rect.x, output->rect.y);
512 other != TAILQ_END(&outputs);
513 other = TAILQ_NEXT(other, outputs)) {
514 if (other == output || !other->active || other->to_be_disabled)
517 if (other->rect.x != output->rect.x ||
518 other->rect.y != output->rect.y)
521 DLOG("output %p has the same position, his mode = %d x %d\n",
522 other, other->rect.width, other->rect.height);
523 uint32_t width = min(other->rect.width, output->rect.width);
524 uint32_t height = min(other->rect.height, output->rect.height);
526 if (update_if_necessary(&(output->rect.width), width) |
527 update_if_necessary(&(output->rect.height), height))
528 output->changed = true;
530 update_if_necessary(&(other->rect.width), width);
531 update_if_necessary(&(other->rect.height), height);
533 DLOG("disabling output %p (%s)\n", other, other->name);
534 other->to_be_disabled = true;
536 DLOG("new output mode %d x %d, other mode %d x %d\n",
537 output->rect.width, output->rect.height,
538 other->rect.width, other->rect.height);
542 /* Handle outputs which have a new mode or are disabled now (either
543 * because the user disabled them or because they are clones) */
544 TAILQ_FOREACH(output, &outputs, outputs) {
545 if (output->to_be_disabled) {
546 output->active = false;
547 DLOG("Output %s disabled, re-assigning workspaces/docks\n", output->name);
549 if ((first = get_first_output()) == NULL)
550 die("No usable outputs available\n");
552 if (output->con != NULL) {
553 /* We need to move the workspaces from the disappearing output to the first output */
554 /* 1: Get the con to focus next, if the disappearing ws is focused */
556 if (TAILQ_FIRST(&(croot->focus_head)) == output->con) {
557 DLOG("This output (%p) was focused! Getting next\n", output->con);
558 next = con_next_focused(output->con);
559 DLOG("next = %p\n", next);
562 /* 2: iterate through workspaces and re-assign them */
564 while (!TAILQ_EMPTY(&(output->con->nodes_head))) {
565 current = TAILQ_FIRST(&(output->con->nodes_head));
566 DLOG("Detaching current = %p / %s\n", current, current->name);
568 DLOG("Re-attaching current = %p / %s\n", current, current->name);
569 con_attach(current, first->con, false);
570 DLOG("Done, next\n");
572 DLOG("re-attached all workspaces\n");
575 DLOG("now focusing next = %p\n", next);
579 DLOG("destroying disappearing con %p\n", output->con);
580 tree_close(output->con, false, true);
581 DLOG("Done. Should be fine now\n");
585 output->to_be_disabled = false;
586 output->changed = false;
589 if (output->active && output->con == NULL) {
590 DLOG("Need to initialize a Con for output %s\n", output->name);
591 output_init_con(output);
592 output->changed = false;
595 if (output->changed) {
596 output_change_mode(conn, output);
597 output->changed = false;
601 if (TAILQ_EMPTY(&outputs)) {
602 ELOG("No outputs found via RandR, disabling\n");
606 //ewmh_update_workarea();
609 /* Just go through each active output and associate one workspace */
610 TAILQ_FOREACH(output, &outputs, outputs) {
611 if (!output->active || output->current_workspace != NULL)
613 ws = get_first_workspace_for_output(output);
614 initialize_output(conn, output, ws);
618 /* Focus the primary screen, if possible */
619 TAILQ_FOREACH(output, &outputs, outputs) {
620 if (!output->primary || !output->con)
623 DLOG("Focusing primary output %s\n", output->name);
624 con_focus(con_descend_focused(output->con));
627 /* render_layout flushes */
635 * We have just established a connection to the X server and need the initial
636 * XRandR information to setup workspaces for each screen.
639 void randr_init(int *event_base) {
640 const xcb_query_extension_reply_t *extreply;
642 extreply = xcb_get_extension_data(conn, &xcb_randr_id);
643 if (!extreply->present)
645 else randr_query_outputs();
647 if (event_base != NULL)
648 *event_base = extreply->first_event;
650 xcb_randr_select_input(conn, root,
651 XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE |
652 XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE |
653 XCB_RANDR_NOTIFY_MASK_CRTC_CHANGE |
654 XCB_RANDR_NOTIFY_MASK_OUTPUT_PROPERTY);