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;
213 TAILQ_INSERT_TAIL(&outputs, s, outputs);
215 randr_disabled = true;
219 * Initializes a CT_OUTPUT Con (searches existing ones from inplace restart
220 * before) to use for the given Output.
222 * XXX: for assignments, we probably need to move workspace creation from here
223 * to after the loop in randr_query_outputs().
226 void output_init_con(Output *output) {
227 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;
268 /* TODO: don't just number workspaces, but get the next assigned one / unused one */
271 asprintf(&(ws->name), "%d", c);
273 con_attach(ws, con, false);
275 asprintf(&name, "[i3 con] workspace %s", ws->name);
276 x_set_name(ws, name);
279 ws->fullscreen_mode = CF_OUTPUT;
280 ws->orientation = HORIZ;
282 /* TODO: Set focus in main.c */
287 * This function needs to be called when changing the mode of an output when
288 * it already has some workspaces (or a bar window) assigned.
290 * It reconfigures the bar window for the new mode, copies the new rect into
291 * each workspace on this output and forces all windows on the affected
292 * workspaces to be reconfigured.
294 * It is necessary to call render_layout() afterwards.
297 static void output_change_mode(xcb_connection_t *conn, Output *output) {
298 //i3Font *font = load_font(conn, config.font);
300 DLOG("Output mode changed, updating rect\n");
301 assert(output->con != NULL);
302 output->con->rect = output->rect;
304 Rect bar_rect = {output->rect.x,
305 output->rect.y + output->rect.height - (font->height + 6),
306 output->rect.x + output->rect.width,
309 xcb_set_window_rect(conn, output->bar, bar_rect);
311 /* go through all workspaces and set force_reconfigure */
312 TAILQ_FOREACH(ws, workspaces, workspaces) {
313 if (ws->output != output)
316 SLIST_FOREACH(client, &(ws->focus_stack), focus_clients) {
317 client->force_reconfigure = true;
318 if (!client_is_floating(client))
320 /* For floating clients we need to translate the
321 * coordinates (old workspace to new workspace) */
322 DLOG("old: (%x, %x)\n", client->rect.x, client->rect.y);
323 client->rect.x -= ws->rect.x;
324 client->rect.y -= ws->rect.y;
325 client->rect.x += ws->output->rect.x;
326 client->rect.y += ws->output->rect.y;
327 DLOG("new: (%x, %x)\n", client->rect.x, client->rect.y);
330 /* Update dimensions from output */
331 memcpy(&(ws->rect), &(ws->output->rect), sizeof(Rect));
333 /* Update the dimensions of a fullscreen client, if any */
334 if (ws->fullscreen_client != NULL) {
335 DLOG("Updating fullscreen client size\n");
336 client = ws->fullscreen_client;
338 xcb_set_window_rect(conn, client->frame, r);
342 xcb_set_window_rect(conn, client->child, r);
349 * Gets called by randr_query_outputs() for each output. The function adds new
350 * outputs to the list of outputs, checks if the mode of existing outputs has
351 * been changed or if an existing output has been disabled. It will then change
352 * either the "changed" or the "to_be_deleted" flag of the output, if
356 static void handle_output(xcb_connection_t *conn, xcb_randr_output_t id,
357 xcb_randr_get_output_info_reply_t *output,
358 xcb_timestamp_t cts, resources_reply *res) {
359 /* each CRT controller has a position in which we are interested in */
362 Output *new = get_output_by_id(id);
363 bool existing = (new != NULL);
365 new = scalloc(sizeof(Output));
368 asprintf(&new->name, "%.*s",
369 xcb_randr_get_output_info_name_length(output),
370 xcb_randr_get_output_info_name(output));
372 DLOG("found output with name %s\n", new->name);
374 /* Even if no CRTC is used at the moment, we store the output so that
375 * we do not need to change the list ever again (we only update the
377 if (output->crtc == XCB_NONE) {
379 TAILQ_INSERT_TAIL(&outputs, new, outputs);
380 else if (new->active)
381 new->to_be_disabled = true;
385 xcb_randr_get_crtc_info_cookie_t icookie;
386 icookie = xcb_randr_get_crtc_info(conn, output->crtc, cts);
387 if ((crtc = xcb_randr_get_crtc_info_reply(conn, icookie, NULL)) == NULL) {
388 DLOG("Skipping output %s: could not get CRTC (%p)\n",
394 bool updated = update_if_necessary(&(new->rect.x), crtc->x) |
395 update_if_necessary(&(new->rect.y), crtc->y) |
396 update_if_necessary(&(new->rect.width), crtc->width) |
397 update_if_necessary(&(new->rect.height), crtc->height);
399 new->active = (new->rect.width != 0 && new->rect.height != 0);
401 DLOG("width/height 0/0, disabling output\n");
405 DLOG("mode: %dx%d+%d+%d\n", new->rect.width, new->rect.height,
406 new->rect.x, new->rect.y);
408 /* If we don’t need to change an existing output or if the output
409 * does not exist in the first place, the case is simple: we either
410 * need to insert the new output or we are done. */
411 if (!updated || !existing) {
413 TAILQ_INSERT_TAIL(&outputs, new, outputs);
421 * (Re-)queries the outputs via RandR and stores them in the list of outputs.
424 void randr_query_outputs() {
425 Output *output, *other, *first;
426 xcb_randr_get_screen_resources_current_cookie_t rcookie;
427 resources_reply *res;
428 /* timestamp of the configuration so that we get consistent replies to all
429 * requests (if the configuration changes between our different calls) */
432 /* an output is VGA-1, LVDS-1, etc. (usually physical video outputs) */
433 xcb_randr_output_t *randr_outputs;
438 /* Get screen resources (crtcs, outputs, modes) */
439 rcookie = xcb_randr_get_screen_resources_current(conn, root);
440 if ((res = xcb_randr_get_screen_resources_current_reply(conn, rcookie, NULL)) == NULL) {
444 cts = res->config_timestamp;
446 int len = xcb_randr_get_screen_resources_current_outputs_length(res);
447 randr_outputs = xcb_randr_get_screen_resources_current_outputs(res);
449 /* Request information for each output */
450 xcb_randr_get_output_info_cookie_t ocookie[len];
451 for (int i = 0; i < len; i++)
452 ocookie[i] = xcb_randr_get_output_info(conn, randr_outputs[i], cts);
454 /* Loop through all outputs available for this X11 screen */
455 for (int i = 0; i < len; i++) {
456 xcb_randr_get_output_info_reply_t *output;
458 if ((output = xcb_randr_get_output_info_reply(conn, ocookie[i], NULL)) == NULL)
461 handle_output(conn, randr_outputs[i], output, cts, res);
466 /* Check for clones, disable the clones and reduce the mode to the
467 * lowest common mode */
468 TAILQ_FOREACH(output, &outputs, outputs) {
469 if (!output->active || output->to_be_disabled)
471 DLOG("output %p, position (%d, %d), checking for clones\n",
472 output, output->rect.x, output->rect.y);
475 other != TAILQ_END(&outputs);
476 other = TAILQ_NEXT(other, outputs)) {
477 if (other == output || !other->active || other->to_be_disabled)
480 if (other->rect.x != output->rect.x ||
481 other->rect.y != output->rect.y)
484 DLOG("output %p has the same position, his mode = %d x %d\n",
485 other, other->rect.width, other->rect.height);
486 uint32_t width = min(other->rect.width, output->rect.width);
487 uint32_t height = min(other->rect.height, output->rect.height);
489 if (update_if_necessary(&(output->rect.width), width) |
490 update_if_necessary(&(output->rect.height), height))
491 output->changed = true;
493 update_if_necessary(&(other->rect.width), width);
494 update_if_necessary(&(other->rect.height), height);
496 DLOG("disabling output %p (%s)\n", other, other->name);
497 other->to_be_disabled = true;
499 DLOG("new output mode %d x %d, other mode %d x %d\n",
500 output->rect.width, output->rect.height,
501 other->rect.width, other->rect.height);
505 /* Handle outputs which have a new mode or are disabled now (either
506 * because the user disabled them or because they are clones) */
507 TAILQ_FOREACH(output, &outputs, outputs) {
508 if (output->to_be_disabled) {
509 output->active = false;
510 DLOG("Output %s disabled, re-assigning workspaces/docks\n", output->name);
512 if ((first = get_first_output()) == NULL)
513 die("No usable outputs available\n");
515 /* We need to move the workspaces from the disappearing output to the first output */
516 /* 1: Get the con to focus next, if the disappearing ws is focused */
518 if (TAILQ_FIRST(&(croot->focus_head)) == output->con) {
519 DLOG("This output (%p) was focused! Getting next\n", output->con);
520 next = con_next_focused(output->con);
521 DLOG("next = %p\n", next);
524 /* 2: iterate through workspaces and re-assign them */
526 while (!TAILQ_EMPTY(&(output->con->nodes_head))) {
527 current = TAILQ_FIRST(&(output->con->nodes_head));
528 DLOG("Detaching current = %p / %s\n", current, current->name);
530 DLOG("Re-attaching current = %p / %s\n", current, current->name);
531 con_attach(current, first->con, false);
532 DLOG("Done, next\n");
534 DLOG("re-attached all workspaces\n");
537 DLOG("now focusing next = %p\n", next);
541 DLOG("destroying disappearing con %p\n", output->con);
542 tree_close(output->con, false, true);
543 DLOG("Done. Should be fine now\n");
546 output->to_be_disabled = false;
549 if (output->active && output->con == NULL) {
550 DLOG("Need to initialize a Con for output %s\n", output->name);
551 output_init_con(output);
552 output->changed = false;
555 if (output->changed) {
556 output_change_mode(conn, output);
557 output->changed = false;
561 if (TAILQ_EMPTY(&outputs)) {
562 ELOG("No outputs found via RandR, disabling\n");
566 //ewmh_update_workarea();
569 /* Just go through each active output and associate one workspace */
570 TAILQ_FOREACH(output, &outputs, outputs) {
571 if (!output->active || output->current_workspace != NULL)
573 ws = get_first_workspace_for_output(output);
574 initialize_output(conn, output, ws);
578 /* render_layout flushes */
583 * We have just established a connection to the X server and need the initial
584 * XRandR information to setup workspaces for each screen.
587 void randr_init(int *event_base) {
588 const xcb_query_extension_reply_t *extreply;
590 extreply = xcb_get_extension_data(conn, &xcb_randr_id);
591 if (!extreply->present)
593 else randr_query_outputs();
595 if (event_base != NULL)
596 *event_base = extreply->first_event;
598 xcb_randr_select_input(conn, root,
599 XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE |
600 XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE |
601 XCB_RANDR_NOTIFY_MASK_CRTC_CHANGE |
602 XCB_RANDR_NOTIFY_MASK_OUTPUT_PROPERTY);