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 /* Stores all outputs available in your current session. */
28 struct outputs_head outputs = TAILQ_HEAD_INITIALIZER(outputs);
30 static bool randr_disabled = false;
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
38 static Output *get_output_by_id(xcb_randr_output_t id) {
40 TAILQ_FOREACH(output, &outputs, outputs)
48 * Returns the output with the given name if it is active (!) or NULL.
51 Output *get_output_by_name(const char *name) {
53 TAILQ_FOREACH(output, &outputs, outputs)
55 strcasecmp(output->name, name) == 0)
62 * Returns the first output which is active.
65 Output *get_first_output() {
68 TAILQ_FOREACH(output, &outputs, outputs)
76 * Returns the active (!) output which contains the coordinates x, y or NULL
77 * if there is no output which contains these coordinates.
80 Output *get_output_containing(int x, int y) {
82 TAILQ_FOREACH(output, &outputs, outputs) {
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))
96 * Gets the output which is the last one in the given direction, for example
97 * the output on the most bottom when direction == D_DOWN, the output most
98 * right when direction == D_RIGHT and so on.
100 * This function always returns a output.
103 Output *get_output_most(direction_t direction, Output *current) {
104 Output *output, *candidate = NULL;
106 TAILQ_FOREACH(output, &outputs, outputs) {
110 /* Repeated calls of WIN determine the winner of the comparison */
111 #define WIN(variable, condition) \
112 if (variable condition) { \
113 candidate = output; \
114 position = variable; \
118 if (((direction == D_UP) || (direction == D_DOWN)) &&
119 (current->rect.x != output->rect.x))
122 if (((direction == D_LEFT) || (direction == D_RIGHT)) &&
123 (current->rect.y != output->rect.y))
128 WIN(output->rect.y, <= position);
130 WIN(output->rect.y, >= position);
132 WIN(output->rect.x, <= position);
134 WIN(output->rect.x, >= position);
138 assert(candidate != NULL);
145 * Initializes the specified output, assigning the specified workspace to it.
148 void initialize_output(xcb_connection_t *conn, Output *output, Workspace *workspace) {
149 i3Font *font = load_font(conn, config.font);
151 workspace->output = output;
152 output->current_workspace = workspace;
154 /* Copy rect for the workspace */
155 memcpy(&(workspace->rect), &(output->rect), sizeof(Rect));
157 /* Map clients on the workspace, if any */
158 workspace_map_clients(conn, workspace);
160 /* Create a bar window on each output */
161 if (!config.disable_workspace_bar) {
162 Rect bar_rect = {output->rect.x,
163 output->rect.y + output->rect.height - (font->height + 6),
164 output->rect.x + output->rect.width,
166 uint32_t mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
167 uint32_t values[] = {1, XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_BUTTON_PRESS};
168 output->bar = create_window(conn, bar_rect, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_CURSOR_LEFT_PTR, true, mask, values);
169 output->bargc = xcb_generate_id(conn);
170 xcb_create_gc(conn, output->bargc, output->bar, 0, 0);
173 SLIST_INIT(&(output->dock_clients));
175 ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"init\"}");
176 DLOG("initialized output at (%d, %d) with %d x %d\n",
177 output->rect.x, output->rect.y, output->rect.width, output->rect.height);
179 DLOG("assigning configured workspaces to this output...\n");
181 TAILQ_FOREACH(ws, workspaces, workspaces) {
184 if (ws->preferred_output == NULL ||
185 get_output_by_name(ws->preferred_output) != output)
188 DLOG("assigning ws %d\n", ws->num + 1);
189 workspace_assign_to(ws, output, true);
195 * Disables RandR support by creating exactly one output with the size of the
199 void disable_randr(xcb_connection_t *conn) {
200 xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
202 DLOG("RandR extension unusable, disabling.\n");
204 Output *s = scalloc(sizeof(Output));
209 s->rect.width = root_screen->width_in_pixels;
210 s->rect.height = root_screen->height_in_pixels;
214 TAILQ_INSERT_TAIL(&outputs, s, outputs);
216 randr_disabled = true;
220 * Initializes a CT_OUTPUT Con (searches existing ones from inplace restart
221 * before) to use for the given Output.
223 * XXX: for assignments, we probably need to move workspace creation from here
224 * to after the loop in randr_query_outputs().
227 void output_init_con(Output *output) {
228 Con *con = NULL, *current;
231 DLOG("init_con for output %s\n", output->name);
233 /* Search for a Con with that name directly below the root node. There
234 * might be one from a restored layout. */
235 TAILQ_FOREACH(current, &(croot->nodes_head), nodes) {
236 if (strcmp(current->name, output->name) != 0)
241 DLOG("Using existing con %p / %s\n", con, con->name);
246 con = con_new(croot);
248 con->name = sstrdup(output->name);
249 con->type = CT_OUTPUT;
251 con->rect = output->rect;
255 asprintf(&name, "[i3 con] output %s", con->name);
256 x_set_name(con, name);
260 DLOG("Not adding workspace, this was a reused con\n");
263 DLOG("Now adding a workspace\n");
265 /* add a workspace to this output */
266 Con *ws = con_new(NULL);
267 ws->type = CT_WORKSPACE;
269 /* get the next unused workspace number */
270 DLOG("Getting next unused workspace\n");
279 asprintf(&(ws->name), "%d", c);
282 TAILQ_FOREACH(out, &(croot->nodes_head), nodes) {
283 TAILQ_FOREACH(current, &(out->nodes_head), nodes) {
284 if (strcasecmp(current->name, ws->name) != 0)
292 DLOG("result for ws %s / %d: exists = %d\n", ws->name, c, exists);
295 con_attach(ws, con, false);
297 asprintf(&name, "[i3 con] workspace %s", ws->name);
298 x_set_name(ws, name);
301 ws->fullscreen_mode = CF_OUTPUT;
302 ws->orientation = HORIZ;
304 /* TODO: Set focus in main.c */
309 * This function needs to be called when changing the mode of an output when
310 * it already has some workspaces (or a bar window) assigned.
312 * It reconfigures the bar window for the new mode, copies the new rect into
313 * each workspace on this output and forces all windows on the affected
314 * workspaces to be reconfigured.
316 * It is necessary to call render_layout() afterwards.
319 static void output_change_mode(xcb_connection_t *conn, Output *output) {
320 //i3Font *font = load_font(conn, config.font);
322 DLOG("Output mode changed, updating rect\n");
323 assert(output->con != NULL);
324 output->con->rect = output->rect;
326 Rect bar_rect = {output->rect.x,
327 output->rect.y + output->rect.height - (font->height + 6),
328 output->rect.x + output->rect.width,
331 xcb_set_window_rect(conn, output->bar, bar_rect);
333 /* go through all workspaces and set force_reconfigure */
334 TAILQ_FOREACH(ws, workspaces, workspaces) {
335 if (ws->output != output)
338 SLIST_FOREACH(client, &(ws->focus_stack), focus_clients) {
339 client->force_reconfigure = true;
340 if (!client_is_floating(client))
342 /* For floating clients we need to translate the
343 * coordinates (old workspace to new workspace) */
344 DLOG("old: (%x, %x)\n", client->rect.x, client->rect.y);
345 client->rect.x -= ws->rect.x;
346 client->rect.y -= ws->rect.y;
347 client->rect.x += ws->output->rect.x;
348 client->rect.y += ws->output->rect.y;
349 DLOG("new: (%x, %x)\n", client->rect.x, client->rect.y);
352 /* Update dimensions from output */
353 memcpy(&(ws->rect), &(ws->output->rect), sizeof(Rect));
355 /* Update the dimensions of a fullscreen client, if any */
356 if (ws->fullscreen_client != NULL) {
357 DLOG("Updating fullscreen client size\n");
358 client = ws->fullscreen_client;
360 xcb_set_window_rect(conn, client->frame, r);
364 xcb_set_window_rect(conn, client->child, r);
371 * Gets called by randr_query_outputs() for each output. The function adds new
372 * outputs to the list of outputs, checks if the mode of existing outputs has
373 * been changed or if an existing output has been disabled. It will then change
374 * either the "changed" or the "to_be_deleted" flag of the output, if
378 static void handle_output(xcb_connection_t *conn, xcb_randr_output_t id,
379 xcb_randr_get_output_info_reply_t *output,
380 xcb_timestamp_t cts, resources_reply *res) {
381 /* each CRT controller has a position in which we are interested in */
384 Output *new = get_output_by_id(id);
385 bool existing = (new != NULL);
387 new = scalloc(sizeof(Output));
390 asprintf(&new->name, "%.*s",
391 xcb_randr_get_output_info_name_length(output),
392 xcb_randr_get_output_info_name(output));
394 DLOG("found output with name %s\n", new->name);
396 /* Even if no CRTC is used at the moment, we store the output so that
397 * we do not need to change the list ever again (we only update the
399 if (output->crtc == XCB_NONE) {
401 TAILQ_INSERT_TAIL(&outputs, new, outputs);
402 else if (new->active)
403 new->to_be_disabled = true;
407 xcb_randr_get_crtc_info_cookie_t icookie;
408 icookie = xcb_randr_get_crtc_info(conn, output->crtc, cts);
409 if ((crtc = xcb_randr_get_crtc_info_reply(conn, icookie, NULL)) == NULL) {
410 DLOG("Skipping output %s: could not get CRTC (%p)\n",
416 bool updated = update_if_necessary(&(new->rect.x), crtc->x) |
417 update_if_necessary(&(new->rect.y), crtc->y) |
418 update_if_necessary(&(new->rect.width), crtc->width) |
419 update_if_necessary(&(new->rect.height), crtc->height);
421 new->active = (new->rect.width != 0 && new->rect.height != 0);
423 DLOG("width/height 0/0, disabling output\n");
427 DLOG("mode: %dx%d+%d+%d\n", new->rect.width, new->rect.height,
428 new->rect.x, new->rect.y);
430 /* If we don’t need to change an existing output or if the output
431 * does not exist in the first place, the case is simple: we either
432 * need to insert the new output or we are done. */
433 if (!updated || !existing) {
435 TAILQ_INSERT_TAIL(&outputs, new, outputs);
443 * (Re-)queries the outputs via RandR and stores them in the list of outputs.
446 void randr_query_outputs() {
447 Output *output, *other, *first;
448 xcb_randr_get_screen_resources_current_cookie_t rcookie;
449 resources_reply *res;
450 /* timestamp of the configuration so that we get consistent replies to all
451 * requests (if the configuration changes between our different calls) */
454 /* an output is VGA-1, LVDS-1, etc. (usually physical video outputs) */
455 xcb_randr_output_t *randr_outputs;
460 /* Get screen resources (crtcs, outputs, modes) */
461 rcookie = xcb_randr_get_screen_resources_current(conn, root);
462 if ((res = xcb_randr_get_screen_resources_current_reply(conn, rcookie, NULL)) == NULL) {
466 cts = res->config_timestamp;
468 int len = xcb_randr_get_screen_resources_current_outputs_length(res);
469 randr_outputs = xcb_randr_get_screen_resources_current_outputs(res);
471 /* Request information for each output */
472 xcb_randr_get_output_info_cookie_t ocookie[len];
473 for (int i = 0; i < len; i++)
474 ocookie[i] = xcb_randr_get_output_info(conn, randr_outputs[i], cts);
476 /* Loop through all outputs available for this X11 screen */
477 for (int i = 0; i < len; i++) {
478 xcb_randr_get_output_info_reply_t *output;
480 if ((output = xcb_randr_get_output_info_reply(conn, ocookie[i], NULL)) == NULL)
483 handle_output(conn, randr_outputs[i], output, cts, res);
488 /* Check for clones, disable the clones and reduce the mode to the
489 * lowest common mode */
490 TAILQ_FOREACH(output, &outputs, outputs) {
491 if (!output->active || output->to_be_disabled)
493 DLOG("output %p, position (%d, %d), checking for clones\n",
494 output, output->rect.x, output->rect.y);
497 other != TAILQ_END(&outputs);
498 other = TAILQ_NEXT(other, outputs)) {
499 if (other == output || !other->active || other->to_be_disabled)
502 if (other->rect.x != output->rect.x ||
503 other->rect.y != output->rect.y)
506 DLOG("output %p has the same position, his mode = %d x %d\n",
507 other, other->rect.width, other->rect.height);
508 uint32_t width = min(other->rect.width, output->rect.width);
509 uint32_t height = min(other->rect.height, output->rect.height);
511 if (update_if_necessary(&(output->rect.width), width) |
512 update_if_necessary(&(output->rect.height), height))
513 output->changed = true;
515 update_if_necessary(&(other->rect.width), width);
516 update_if_necessary(&(other->rect.height), height);
518 DLOG("disabling output %p (%s)\n", other, other->name);
519 other->to_be_disabled = true;
521 DLOG("new output mode %d x %d, other mode %d x %d\n",
522 output->rect.width, output->rect.height,
523 other->rect.width, other->rect.height);
527 /* Handle outputs which have a new mode or are disabled now (either
528 * because the user disabled them or because they are clones) */
529 TAILQ_FOREACH(output, &outputs, outputs) {
530 if (output->to_be_disabled) {
531 output->active = false;
532 DLOG("Output %s disabled, re-assigning workspaces/docks\n", output->name);
534 if ((first = get_first_output()) == NULL)
535 die("No usable outputs available\n");
537 /* We need to move the workspaces from the disappearing output to the first output */
538 /* 1: Get the con to focus next, if the disappearing ws is focused */
540 if (TAILQ_FIRST(&(croot->focus_head)) == output->con) {
541 DLOG("This output (%p) was focused! Getting next\n", output->con);
542 next = con_next_focused(output->con);
543 DLOG("next = %p\n", next);
546 /* 2: iterate through workspaces and re-assign them */
548 while (!TAILQ_EMPTY(&(output->con->nodes_head))) {
549 current = TAILQ_FIRST(&(output->con->nodes_head));
550 DLOG("Detaching current = %p / %s\n", current, current->name);
552 DLOG("Re-attaching current = %p / %s\n", current, current->name);
553 con_attach(current, first->con, false);
554 DLOG("Done, next\n");
556 DLOG("re-attached all workspaces\n");
559 DLOG("now focusing next = %p\n", next);
563 DLOG("destroying disappearing con %p\n", output->con);
564 tree_close(output->con, false, true);
565 DLOG("Done. Should be fine now\n");
568 output->to_be_disabled = false;
571 if (output->active && output->con == NULL) {
572 DLOG("Need to initialize a Con for output %s\n", output->name);
573 output_init_con(output);
574 output->changed = false;
577 if (output->changed) {
578 output_change_mode(conn, output);
579 output->changed = false;
583 if (TAILQ_EMPTY(&outputs)) {
584 ELOG("No outputs found via RandR, disabling\n");
588 //ewmh_update_workarea();
591 /* Just go through each active output and associate one workspace */
592 TAILQ_FOREACH(output, &outputs, outputs) {
593 if (!output->active || output->current_workspace != NULL)
595 ws = get_first_workspace_for_output(output);
596 initialize_output(conn, output, ws);
600 /* render_layout flushes */
605 * We have just established a connection to the X server and need the initial
606 * XRandR information to setup workspaces for each screen.
609 void randr_init(int *event_base) {
610 const xcb_query_extension_reply_t *extreply;
612 extreply = xcb_get_extension_data(conn, &xcb_randr_id);
613 if (!extreply->present)
615 else randr_query_outputs();
617 if (event_base != NULL)
618 *event_base = extreply->first_event;
620 xcb_randr_select_input(conn, root,
621 XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE |
622 XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE |
623 XCB_RANDR_NOTIFY_MASK_CRTC_CHANGE |
624 XCB_RANDR_NOTIFY_MASK_OUTPUT_PROPERTY);