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;
232 DLOG("init_con for output %s\n", output->name);
234 /* Search for a Con with that name directly below the root node. There
235 * might be one from a restored layout. */
236 TAILQ_FOREACH(current, &(croot->nodes_head), nodes) {
237 if (strcmp(current->name, output->name) != 0)
242 DLOG("Using existing con %p / %s\n", con, con->name);
247 con = con_new(croot);
249 con->name = sstrdup(output->name);
250 con->type = CT_OUTPUT;
252 con->rect = output->rect;
256 asprintf(&name, "[i3 con] output %s", con->name);
257 x_set_name(con, name);
261 DLOG("Not adding workspace, this was a reused con\n");
264 DLOG("Now adding a workspace\n");
266 /* add a workspace to this output */
267 Con *ws = con_new(NULL);
268 ws->type = CT_WORKSPACE;
269 /* TODO: don't just number workspaces, but get the next assigned one / unused one */
272 asprintf(&(ws->name), "%d", c);
274 con_attach(ws, con, false);
276 asprintf(&name, "[i3 con] workspace %s", ws->name);
277 x_set_name(ws, name);
280 ws->fullscreen_mode = CF_OUTPUT;
281 ws->orientation = HORIZ;
283 /* TODO: Set focus in main.c */
288 * This function needs to be called when changing the mode of an output when
289 * it already has some workspaces (or a bar window) assigned.
291 * It reconfigures the bar window for the new mode, copies the new rect into
292 * each workspace on this output and forces all windows on the affected
293 * workspaces to be reconfigured.
295 * It is necessary to call render_layout() afterwards.
298 static void output_change_mode(xcb_connection_t *conn, Output *output) {
299 //i3Font *font = load_font(conn, config.font);
301 DLOG("Output mode changed, updating rect\n");
302 assert(output->con != NULL);
303 output->con->rect = output->rect;
305 Rect bar_rect = {output->rect.x,
306 output->rect.y + output->rect.height - (font->height + 6),
307 output->rect.x + output->rect.width,
310 xcb_set_window_rect(conn, output->bar, bar_rect);
312 /* go through all workspaces and set force_reconfigure */
313 TAILQ_FOREACH(ws, workspaces, workspaces) {
314 if (ws->output != output)
317 SLIST_FOREACH(client, &(ws->focus_stack), focus_clients) {
318 client->force_reconfigure = true;
319 if (!client_is_floating(client))
321 /* For floating clients we need to translate the
322 * coordinates (old workspace to new workspace) */
323 DLOG("old: (%x, %x)\n", client->rect.x, client->rect.y);
324 client->rect.x -= ws->rect.x;
325 client->rect.y -= ws->rect.y;
326 client->rect.x += ws->output->rect.x;
327 client->rect.y += ws->output->rect.y;
328 DLOG("new: (%x, %x)\n", client->rect.x, client->rect.y);
331 /* Update dimensions from output */
332 memcpy(&(ws->rect), &(ws->output->rect), sizeof(Rect));
334 /* Update the dimensions of a fullscreen client, if any */
335 if (ws->fullscreen_client != NULL) {
336 DLOG("Updating fullscreen client size\n");
337 client = ws->fullscreen_client;
339 xcb_set_window_rect(conn, client->frame, r);
343 xcb_set_window_rect(conn, client->child, r);
350 * Gets called by randr_query_outputs() for each output. The function adds new
351 * outputs to the list of outputs, checks if the mode of existing outputs has
352 * been changed or if an existing output has been disabled. It will then change
353 * either the "changed" or the "to_be_deleted" flag of the output, if
357 static void handle_output(xcb_connection_t *conn, xcb_randr_output_t id,
358 xcb_randr_get_output_info_reply_t *output,
359 xcb_timestamp_t cts, resources_reply *res) {
360 /* each CRT controller has a position in which we are interested in */
363 Output *new = get_output_by_id(id);
364 bool existing = (new != NULL);
366 new = scalloc(sizeof(Output));
369 asprintf(&new->name, "%.*s",
370 xcb_randr_get_output_info_name_length(output),
371 xcb_randr_get_output_info_name(output));
373 DLOG("found output with name %s\n", new->name);
375 /* Even if no CRTC is used at the moment, we store the output so that
376 * we do not need to change the list ever again (we only update the
378 if (output->crtc == XCB_NONE) {
380 TAILQ_INSERT_TAIL(&outputs, new, outputs);
381 else if (new->active)
382 new->to_be_disabled = true;
386 xcb_randr_get_crtc_info_cookie_t icookie;
387 icookie = xcb_randr_get_crtc_info(conn, output->crtc, cts);
388 if ((crtc = xcb_randr_get_crtc_info_reply(conn, icookie, NULL)) == NULL) {
389 DLOG("Skipping output %s: could not get CRTC (%p)\n",
395 bool updated = update_if_necessary(&(new->rect.x), crtc->x) |
396 update_if_necessary(&(new->rect.y), crtc->y) |
397 update_if_necessary(&(new->rect.width), crtc->width) |
398 update_if_necessary(&(new->rect.height), crtc->height);
400 new->active = (new->rect.width != 0 && new->rect.height != 0);
402 DLOG("width/height 0/0, disabling output\n");
406 DLOG("mode: %dx%d+%d+%d\n", new->rect.width, new->rect.height,
407 new->rect.x, new->rect.y);
409 /* If we don’t need to change an existing output or if the output
410 * does not exist in the first place, the case is simple: we either
411 * need to insert the new output or we are done. */
412 if (!updated || !existing) {
414 TAILQ_INSERT_TAIL(&outputs, new, outputs);
422 * (Re-)queries the outputs via RandR and stores them in the list of outputs.
425 void randr_query_outputs() {
426 Output *output, *other, *first;
427 xcb_randr_get_screen_resources_current_cookie_t rcookie;
428 resources_reply *res;
429 /* timestamp of the configuration so that we get consistent replies to all
430 * requests (if the configuration changes between our different calls) */
433 /* an output is VGA-1, LVDS-1, etc. (usually physical video outputs) */
434 xcb_randr_output_t *randr_outputs;
439 /* Get screen resources (crtcs, outputs, modes) */
440 rcookie = xcb_randr_get_screen_resources_current(conn, root);
441 if ((res = xcb_randr_get_screen_resources_current_reply(conn, rcookie, NULL)) == NULL) {
445 cts = res->config_timestamp;
447 int len = xcb_randr_get_screen_resources_current_outputs_length(res);
448 randr_outputs = xcb_randr_get_screen_resources_current_outputs(res);
450 /* Request information for each output */
451 xcb_randr_get_output_info_cookie_t ocookie[len];
452 for (int i = 0; i < len; i++)
453 ocookie[i] = xcb_randr_get_output_info(conn, randr_outputs[i], cts);
455 /* Loop through all outputs available for this X11 screen */
456 for (int i = 0; i < len; i++) {
457 xcb_randr_get_output_info_reply_t *output;
459 if ((output = xcb_randr_get_output_info_reply(conn, ocookie[i], NULL)) == NULL)
462 handle_output(conn, randr_outputs[i], output, cts, res);
467 /* Check for clones, disable the clones and reduce the mode to the
468 * lowest common mode */
469 TAILQ_FOREACH(output, &outputs, outputs) {
470 if (!output->active || output->to_be_disabled)
472 DLOG("output %p, position (%d, %d), checking for clones\n",
473 output, output->rect.x, output->rect.y);
476 other != TAILQ_END(&outputs);
477 other = TAILQ_NEXT(other, outputs)) {
478 if (other == output || !other->active || other->to_be_disabled)
481 if (other->rect.x != output->rect.x ||
482 other->rect.y != output->rect.y)
485 DLOG("output %p has the same position, his mode = %d x %d\n",
486 other, other->rect.width, other->rect.height);
487 uint32_t width = min(other->rect.width, output->rect.width);
488 uint32_t height = min(other->rect.height, output->rect.height);
490 if (update_if_necessary(&(output->rect.width), width) |
491 update_if_necessary(&(output->rect.height), height))
492 output->changed = true;
494 update_if_necessary(&(other->rect.width), width);
495 update_if_necessary(&(other->rect.height), height);
497 DLOG("disabling output %p (%s)\n", other, other->name);
498 other->to_be_disabled = true;
500 DLOG("new output mode %d x %d, other mode %d x %d\n",
501 output->rect.width, output->rect.height,
502 other->rect.width, other->rect.height);
506 /* Handle outputs which have a new mode or are disabled now (either
507 * because the user disabled them or because they are clones) */
508 TAILQ_FOREACH(output, &outputs, outputs) {
509 if (output->to_be_disabled) {
510 output->active = false;
511 DLOG("Output %s disabled, re-assigning workspaces/docks\n", output->name);
513 if ((first = get_first_output()) == NULL)
514 die("No usable outputs available\n");
516 /* We need to move the workspaces from the disappearing output to the first output */
517 /* 1: Get the con to focus next, if the disappearing ws is focused */
519 if (TAILQ_FIRST(&(croot->focus_head)) == output->con) {
520 DLOG("This output (%p) was focused! Getting next\n", output->con);
521 next = con_next_focused(output->con);
522 DLOG("next = %p\n", next);
525 /* 2: iterate through workspaces and re-assign them */
527 while (!TAILQ_EMPTY(&(output->con->nodes_head))) {
528 current = TAILQ_FIRST(&(output->con->nodes_head));
529 DLOG("Detaching current = %p / %s\n", current, current->name);
531 DLOG("Re-attaching current = %p / %s\n", current, current->name);
532 con_attach(current, first->con, false);
533 DLOG("Done, next\n");
535 DLOG("re-attached all workspaces\n");
538 DLOG("now focusing next = %p\n", next);
542 DLOG("destroying disappearing con %p\n", output->con);
543 tree_close(output->con, false, true);
544 DLOG("Done. Should be fine now\n");
547 output->to_be_disabled = false;
550 if (output->active && output->con == NULL) {
551 DLOG("Need to initialize a Con for output %s\n", output->name);
552 output_init_con(output);
553 output->changed = false;
556 if (output->changed) {
557 output_change_mode(conn, output);
558 output->changed = false;
562 if (TAILQ_EMPTY(&outputs)) {
563 ELOG("No outputs found via RandR, disabling\n");
567 //ewmh_update_workarea();
570 /* Just go through each active output and associate one workspace */
571 TAILQ_FOREACH(output, &outputs, outputs) {
572 if (!output->active || output->current_workspace != NULL)
574 ws = get_first_workspace_for_output(output);
575 initialize_output(conn, output, ws);
579 /* render_layout flushes */
584 * We have just established a connection to the X server and need the initial
585 * XRandR information to setup workspaces for each screen.
588 void randr_init(int *event_base) {
589 const xcb_query_extension_reply_t *extreply;
591 extreply = xcb_get_extension_data(conn, &xcb_randr_id);
592 if (!extreply->present)
594 else randr_query_outputs();
596 if (event_base != NULL)
597 *event_base = extreply->first_event;
599 xcb_randr_select_input(conn, root,
600 XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE |
601 XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE |
602 XCB_RANDR_NOTIFY_MASK_CRTC_CHANGE |
603 XCB_RANDR_NOTIFY_MASK_OUTPUT_PROPERTY);