4 * i3 - an improved dynamic tiling window manager
6 * © 2009-2010 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).
24 #include <xcb/randr.h>
34 #include "workspace.h"
40 /* While a clean namespace is usually a pretty good thing, we really need
41 * to use shorter names than the whole xcb_randr_* default names. */
42 typedef xcb_randr_get_crtc_info_reply_t crtc_info;
43 typedef xcb_randr_mode_info_t mode_info;
44 typedef xcb_randr_get_screen_resources_current_reply_t resources_reply;
46 /* Stores all outputs available in your current session. */
47 struct outputs_head outputs = TAILQ_HEAD_INITIALIZER(outputs);
49 static bool randr_disabled = false;
52 * Get a specific output by its internal X11 id. Used by randr_query_outputs
53 * to check if the output is new (only in the first scan) or if we are
57 static Output *get_output_by_id(xcb_randr_output_t id) {
59 TAILQ_FOREACH(output, &outputs, outputs)
67 * Returns the output with the given name if it is active (!) or NULL.
70 Output *get_output_by_name(const char *name) {
72 TAILQ_FOREACH(output, &outputs, outputs)
74 strcasecmp(output->name, name) == 0)
81 * Returns the first output which is active.
84 Output *get_first_output() {
87 TAILQ_FOREACH(output, &outputs, outputs)
95 * Returns the active (!) output which contains the coordinates x, y or NULL
96 * if there is no output which contains these coordinates.
99 Output *get_output_containing(int x, int y) {
101 TAILQ_FOREACH(output, &outputs, outputs) {
104 DLOG("comparing x=%d y=%d with x=%d and y=%d width %d height %d\n",
105 x, y, output->rect.x, output->rect.y, output->rect.width, output->rect.height);
106 if (x >= output->rect.x && x < (output->rect.x + output->rect.width) &&
107 y >= output->rect.y && y < (output->rect.y + output->rect.height))
115 * Gets the output which is the last one in the given direction, for example
116 * the output on the most bottom when direction == D_DOWN, the output most
117 * right when direction == D_RIGHT and so on.
119 * This function always returns a output.
122 Output *get_output_most(direction_t direction, Output *current) {
123 Output *output, *candidate = NULL;
125 TAILQ_FOREACH(output, &outputs, outputs) {
129 /* Repeated calls of WIN determine the winner of the comparison */
130 #define WIN(variable, condition) \
131 if (variable condition) { \
132 candidate = output; \
133 position = variable; \
137 if (((direction == D_UP) || (direction == D_DOWN)) &&
138 (current->rect.x != output->rect.x))
141 if (((direction == D_LEFT) || (direction == D_RIGHT)) &&
142 (current->rect.y != output->rect.y))
147 WIN(output->rect.y, <= position);
149 WIN(output->rect.y, >= position);
151 WIN(output->rect.x, <= position);
153 WIN(output->rect.x, >= position);
157 assert(candidate != NULL);
163 * Initializes the specified output, assigning the specified workspace to it.
166 void initialize_output(xcb_connection_t *conn, Output *output, Workspace *workspace) {
167 i3Font *font = load_font(conn, config.font);
169 workspace->output = output;
170 output->current_workspace = workspace;
172 /* Copy rect for the workspace */
173 memcpy(&(workspace->rect), &(output->rect), sizeof(Rect));
175 /* Map clients on the workspace, if any */
176 workspace_map_clients(conn, workspace);
178 /* Create a bar window on each output */
179 if (!config.disable_workspace_bar) {
180 Rect bar_rect = {output->rect.x,
181 output->rect.y + output->rect.height - (font->height + 6),
182 output->rect.x + output->rect.width,
184 uint32_t mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
185 uint32_t values[] = {1, XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_BUTTON_PRESS};
186 output->bar = create_window(conn, bar_rect, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_CURSOR_LEFT_PTR, true, mask, values);
187 output->bargc = xcb_generate_id(conn);
188 xcb_create_gc(conn, output->bargc, output->bar, 0, 0);
191 SLIST_INIT(&(output->dock_clients));
193 ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"init\"}");
194 DLOG("initialized output at (%d, %d) with %d x %d\n",
195 output->rect.x, output->rect.y, output->rect.width, output->rect.height);
199 * Disables RandR support by creating exactly one output with the size of the
203 void disable_randr(xcb_connection_t *conn) {
204 xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
206 DLOG("RandR extension unusable, disabling.\n");
208 Output *s = scalloc(sizeof(Output));
213 s->rect.width = root_screen->width_in_pixels;
214 s->rect.height = root_screen->height_in_pixels;
217 TAILQ_INSERT_TAIL(&outputs, s, outputs);
219 randr_disabled = true;
223 * This function needs to be called when changing the mode of an output when
224 * it already has some workspaces (or a bar window) assigned.
226 * It reconfigures the bar window for the new mode, copies the new rect into
227 * each workspace on this output and forces all windows on the affected
228 * workspaces to be reconfigured.
230 * It is necessary to call render_layout() afterwards.
233 static void output_change_mode(xcb_connection_t *conn, Output *output) {
234 i3Font *font = load_font(conn, config.font);
238 DLOG("Output mode changed, reconfiguring bar, updating workspaces\n");
239 Rect bar_rect = {output->rect.x,
240 output->rect.y + output->rect.height - (font->height + 6),
241 output->rect.x + output->rect.width,
244 xcb_set_window_rect(conn, output->bar, bar_rect);
246 /* go through all workspaces and set force_reconfigure */
247 TAILQ_FOREACH(ws, workspaces, workspaces) {
248 if (ws->output != output)
251 SLIST_FOREACH(client, &(ws->focus_stack), focus_clients) {
252 client->force_reconfigure = true;
253 if (!client_is_floating(client))
255 /* For floating clients we need to translate the
256 * coordinates (old workspace to new workspace) */
257 DLOG("old: (%x, %x)\n", client->rect.x, client->rect.y);
258 client->rect.x -= ws->rect.x;
259 client->rect.y -= ws->rect.y;
260 client->rect.x += ws->output->rect.x;
261 client->rect.y += ws->output->rect.y;
262 DLOG("new: (%x, %x)\n", client->rect.x, client->rect.y);
265 /* Update dimensions from output */
266 memcpy(&(ws->rect), &(ws->output->rect), sizeof(Rect));
268 /* Update the dimensions of a fullscreen client, if any */
269 if (ws->fullscreen_client != NULL) {
270 DLOG("Updating fullscreen client size\n");
271 client = ws->fullscreen_client;
273 xcb_set_window_rect(conn, client->frame, r);
277 xcb_set_window_rect(conn, client->child, r);
283 * Gets called by randr_query_outputs() for each output. The function adds new
284 * outputs to the list of outputs, checks if the mode of existing outputs has
285 * been changed or if an existing output has been disabled. It will then change
286 * either the "changed" or the "to_be_deleted" flag of the output, if
290 static void handle_output(xcb_connection_t *conn, xcb_randr_output_t id,
291 xcb_randr_get_output_info_reply_t *output,
292 xcb_timestamp_t cts, resources_reply *res) {
293 /* each CRT controller has a position in which we are interested in */
296 Output *new = get_output_by_id(id);
297 bool existing = (new != NULL);
299 new = scalloc(sizeof(Output));
301 asprintf(&new->name, "%.*s",
302 xcb_randr_get_output_info_name_length(output),
303 xcb_randr_get_output_info_name(output));
305 DLOG("found output with name %s\n", new->name);
307 /* Even if no CRTC is used at the moment, we store the output so that
308 * we do not need to change the list ever again (we only update the
310 if (output->crtc == XCB_NONE) {
312 TAILQ_INSERT_TAIL(&outputs, new, outputs);
313 else if (new->active) {
314 new->to_be_disabled = true;
321 xcb_randr_get_crtc_info_cookie_t icookie;
322 icookie = xcb_randr_get_crtc_info(conn, output->crtc, cts);
323 if ((crtc = xcb_randr_get_crtc_info_reply(conn, icookie, NULL)) == NULL) {
324 DLOG("Skipping output %s: could not get CRTC (%p)\n",
332 bool updated = update_if_necessary(&(new->rect.x), crtc->x) |
333 update_if_necessary(&(new->rect.y), crtc->y) |
334 update_if_necessary(&(new->rect.width), crtc->width) |
335 update_if_necessary(&(new->rect.height), crtc->height);
337 DLOG("mode: %dx%d+%d+%d\n", new->rect.width, new->rect.height,
338 new->rect.x, new->rect.y);
340 /* If we don’t need to change an existing output or if the output
341 * does not exist in the first place, the case is simple: we either
342 * need to insert the new output or we are done. */
343 if (!updated || !existing) {
345 TAILQ_INSERT_TAIL(&outputs, new, outputs);
354 * (Re-)queries the outputs via RandR and stores them in the list of outputs.
357 void randr_query_outputs(xcb_connection_t *conn) {
359 Output *output, *other, *first;
360 xcb_randr_get_screen_resources_current_cookie_t rcookie;
361 resources_reply *res;
362 /* timestamp of the configuration so that we get consistent replies to all
363 * requests (if the configuration changes between our different calls) */
366 /* an output is VGA-1, LVDS-1, etc. (usually physical video outputs) */
367 xcb_randr_output_t *randr_outputs;
372 /* Get screen resources (crtcs, outputs, modes) */
373 rcookie = xcb_randr_get_screen_resources_current(conn, root);
374 if ((res = xcb_randr_get_screen_resources_current_reply(conn, rcookie, NULL)) == NULL) {
378 cts = res->config_timestamp;
380 int len = xcb_randr_get_screen_resources_current_outputs_length(res);
381 randr_outputs = xcb_randr_get_screen_resources_current_outputs(res);
383 /* Request information for each output */
384 xcb_randr_get_output_info_cookie_t ocookie[len];
385 for (int i = 0; i < len; i++)
386 ocookie[i] = xcb_randr_get_output_info(conn, randr_outputs[i], cts);
388 /* Loop through all outputs available for this X11 screen */
389 for (int i = 0; i < len; i++) {
390 xcb_randr_get_output_info_reply_t *output;
392 if ((output = xcb_randr_get_output_info_reply(conn, ocookie[i], NULL)) == NULL)
395 handle_output(conn, randr_outputs[i], output, cts, res);
399 /* Check for clones, disable the clones and reduce the mode to the
400 * lowest common mode */
401 TAILQ_FOREACH(output, &outputs, outputs) {
402 if (!output->active || output->to_be_disabled)
404 DLOG("output %p, position (%d, %d), checking for clones\n",
405 output, output->rect.x, output->rect.y);
408 other != TAILQ_END(&outputs);
409 other = TAILQ_NEXT(other, outputs)) {
410 if (other == output || !other->active || other->to_be_disabled)
413 if (other->rect.x != output->rect.x ||
414 other->rect.y != output->rect.y)
417 DLOG("output %p has the same position, his mode = %d x %d\n",
418 other, other->rect.width, other->rect.height);
419 uint32_t width = min(other->rect.width, output->rect.width);
420 uint32_t height = min(other->rect.height, output->rect.height);
422 if (update_if_necessary(&(output->rect.width), width) |
423 update_if_necessary(&(output->rect.height), height))
424 output->changed = true;
426 update_if_necessary(&(other->rect.width), width);
427 update_if_necessary(&(other->rect.height), height);
429 DLOG("disabling output %p (%s)\n", other, other->name);
430 other->to_be_disabled = true;
432 DLOG("new output mode %d x %d, other mode %d x %d\n",
433 output->rect.width, output->rect.height,
434 other->rect.width, other->rect.height);
438 /* Handle outputs which have a new mode or are disabled now (either
439 * because the user disabled them or because they are clones) */
440 TAILQ_FOREACH(output, &outputs, outputs) {
441 if (output->to_be_disabled) {
442 output->active = false;
443 DLOG("Output %s disabled, re-assigning workspaces/docks\n", output->name);
445 if ((first = get_first_output()) == NULL)
446 die("No usable outputs available\n");
448 bool needs_init = (first->current_workspace == NULL);
450 TAILQ_FOREACH(ws, workspaces, workspaces) {
451 if (ws->output != output)
454 workspace_assign_to(ws, first, true);
457 initialize_output(conn, first, ws);
462 while (!SLIST_EMPTY(&(output->dock_clients))) {
463 dock = SLIST_FIRST(&(output->dock_clients));
464 SLIST_REMOVE_HEAD(&(output->dock_clients), dock_clients);
465 SLIST_INSERT_HEAD(&(first->dock_clients), dock, dock_clients);
467 output->current_workspace = NULL;
468 output->to_be_disabled = false;
469 } else if (output->changed) {
470 output_change_mode(conn, output);
471 output->changed = false;
475 if (TAILQ_EMPTY(&outputs)) {
476 ELOG("No outputs found via RandR, disabling\n");
480 ewmh_update_workarea();
482 /* Just go through each active output and associate one workspace */
483 TAILQ_FOREACH(output, &outputs, outputs) {
484 if (!output->active || output->current_workspace != NULL)
486 ws = get_first_workspace_for_output(output);
487 initialize_output(conn, output, ws);
490 /* render_layout flushes */
495 * We have just established a connection to the X server and need the initial
496 * XRandR information to setup workspaces for each screen.
499 void initialize_randr(xcb_connection_t *conn, int *event_base) {
500 const xcb_query_extension_reply_t *extreply;
502 extreply = xcb_get_extension_data(conn, &xcb_randr_id);
503 if (!extreply->present)
505 else randr_query_outputs(conn);
507 if (event_base != NULL)
508 *event_base = extreply->first_event;
510 xcb_randr_select_input(conn, root,
511 XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE |
512 XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE |
513 XCB_RANDR_NOTIFY_MASK_CRTC_CHANGE |
514 XCB_RANDR_NOTIFY_MASK_OUTPUT_PROPERTY);