4 * i3 - an improved dynamic tiling window manager
6 * © 2009 Michael Stapelberg and contributors
8 * See file LICENSE for license information.
19 #include <xcb/xinerama.h>
31 /* This TAILQ of i3Screens stores the virtual screens, used for handling overlapping screens
32 * (xrandr --same-as) */
33 struct screens_head *virtual_screens;
35 static bool xinerama_enabled = true;
38 * Looks in virtual_screens for the i3Screen whose start coordinates are x, y
41 i3Screen *get_screen_at(int x, int y, struct screens_head *screenlist) {
43 TAILQ_FOREACH(screen, screenlist, screens)
44 if (screen->rect.x == x && screen->rect.y == y)
51 * Looks in virtual_screens for the i3Screen which contains coordinates x, y
54 i3Screen *get_screen_containing(int x, int y) {
56 TAILQ_FOREACH(screen, virtual_screens, screens) {
57 LOG("comparing x=%d y=%d with x=%d and y=%d width %d height %d\n",
58 x, y, screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height);
59 if (x >= screen->rect.x && x < (screen->rect.x + screen->rect.width) &&
60 y >= screen->rect.y && y < (screen->rect.y + screen->rect.height))
68 * Gets the screen which is the last one in the given direction, for example the screen
69 * on the most bottom when direction == D_DOWN, the screen most right when direction == D_RIGHT
72 * This function always returns a screen.
75 i3Screen *get_screen_most(direction_t direction) {
76 i3Screen *screen, *candidate = NULL;
78 TAILQ_FOREACH(screen, virtual_screens, screens) {
79 /* Repeated calls of WIN determine the winner of the comparison */
80 #define WIN(variable, condition) \
81 if (variable condition) { \
83 position = variable; \
89 WIN(screen->rect.y, <= position);
91 WIN(screen->rect.y, >= position);
93 WIN(screen->rect.x, <= position);
95 WIN(screen->rect.x, >= position);
99 assert(candidate != NULL);
104 static void initialize_screen(xcb_connection_t *conn, i3Screen *screen, Workspace *workspace) {
105 i3Font *font = load_font(conn, config.font);
107 workspace->screen = screen;
108 screen->current_workspace = workspace->num;
110 /* Create a bar for each screen */
111 Rect bar_rect = {screen->rect.x,
112 screen->rect.height - (font->height + 6),
113 screen->rect.x + screen->rect.width,
115 uint32_t mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
116 uint32_t values[] = {1, XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_BUTTON_PRESS};
117 screen->bar = create_window(conn, bar_rect, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_CURSOR_LEFT_PTR, mask, values);
118 screen->bargc = xcb_generate_id(conn);
119 xcb_create_gc(conn, screen->bargc, screen->bar, 0, 0);
121 SLIST_INIT(&(screen->dock_clients));
123 /* Copy dimensions */
124 memcpy(&(workspace->rect), &(screen->rect), sizeof(Rect));
125 LOG("that is virtual screen at %d x %d with %d x %d\n",
126 screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height);
130 * Fills virtual_screens with exactly one screen with width/height of the whole X server.
133 static void disable_xinerama(xcb_connection_t *conn) {
134 xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
136 i3Screen *s = calloc(sizeof(i3Screen), 1);
140 s->rect.width = root_screen->width_in_pixels;
141 s->rect.height = root_screen->height_in_pixels;
145 initialize_screen(conn, s, &(workspaces[0]));
147 TAILQ_INSERT_TAIL(virtual_screens, s, screens);
149 xinerama_enabled = false;
153 * Gets the Xinerama screens and converts them to virtual i3Screens (only one screen for two
154 * Xinerama screen which are configured in clone mode) in the given screenlist
157 static void query_screens(xcb_connection_t *conn, struct screens_head *screenlist) {
158 xcb_xinerama_query_screens_reply_t *reply;
159 xcb_xinerama_screen_info_t *screen_info;
160 time_t before_trying = time(NULL);
162 /* Try repeatedly to find screens (there might be short timeframes in
163 * which the X server does not return any screens, such as when rotating
164 * screens), but not longer than 5 seconds (strictly speaking, only four
165 * seconds of trying are guaranteed due to the 1-second-resolution) */
166 while ((time(NULL) - before_trying) < 5) {
167 reply = xcb_xinerama_query_screens_reply(conn, xcb_xinerama_query_screens_unchecked(conn), NULL);
169 LOG("Couldn't get Xinerama screens\n");
172 screen_info = xcb_xinerama_query_screens_screen_info(reply);
173 int screens = xcb_xinerama_query_screens_screen_info_length(reply);
176 for (int screen = 0; screen < screens; screen++) {
177 i3Screen *s = get_screen_at(screen_info[screen].x_org, screen_info[screen].y_org, screenlist);
179 /* This screen already exists. We use the littlest screen so that the user
180 can always see the complete workspace */
181 s->rect.width = min(s->rect.width, screen_info[screen].width);
182 s->rect.height = min(s->rect.height, screen_info[screen].height);
184 s = calloc(sizeof(i3Screen), 1);
185 s->rect.x = screen_info[screen].x_org;
186 s->rect.y = screen_info[screen].y_org;
187 s->rect.width = screen_info[screen].width;
188 s->rect.height = screen_info[screen].height;
189 /* We always treat the screen at 0x0 as the primary screen */
190 if (s->rect.x == 0 && s->rect.y == 0)
191 TAILQ_INSERT_HEAD(screenlist, s, screens);
192 else TAILQ_INSERT_TAIL(screenlist, s, screens);
196 LOG("found Xinerama screen: %d x %d at %d x %d\n",
197 screen_info[screen].width, screen_info[screen].height,
198 screen_info[screen].x_org, screen_info[screen].y_org);
203 if (num_screens == 0) {
204 LOG("No screens found. This is weird. Trying again...\n");
213 * We have just established a connection to the X server and need the initial Xinerama
214 * information to setup workspaces for each screen.
217 void initialize_xinerama(xcb_connection_t *conn) {
218 virtual_screens = scalloc(sizeof(struct screens_head));
219 TAILQ_INIT(virtual_screens);
221 if (!xcb_get_extension_data(conn, &xcb_xinerama_id)->present) {
222 LOG("Xinerama extension not found, disabling.\n");
223 disable_xinerama(conn);
227 xcb_xinerama_is_active_reply_t *reply;
228 reply = xcb_xinerama_is_active_reply(conn, xcb_xinerama_is_active(conn), NULL);
230 if (reply == NULL || !reply->state) {
231 LOG("Xinerama is not active (in your X-Server), disabling.\n");
232 disable_xinerama(conn);
234 query_screens(conn, virtual_screens);
240 /* Just go through each workspace and associate as many screens as we can. */
241 TAILQ_FOREACH(s, virtual_screens, screens) {
242 s->num = num_screens;
243 initialize_screen(conn, s, &(workspaces[num_screens]));
249 * This is called when the rootwindow receives a configure_notify event and therefore the
250 * number/position of the Xinerama screens could have changed.
253 void xinerama_requery_screens(xcb_connection_t *conn) {
254 i3Font *font = load_font(conn, config.font);
256 /* POSSIBLE PROBLEM: Is the order of the Xinerama screens always constant? That is, can
257 it change when I move the --right-of video projector to --left-of? */
259 if (!xinerama_enabled) {
260 LOG("Xinerama is disabled\n");
264 /* We use a separate copy to diff with the previous set of screens */
265 struct screens_head *new_screens = scalloc(sizeof(struct screens_head));
266 TAILQ_INIT(new_screens);
268 query_screens(conn, new_screens);
270 i3Screen *first = TAILQ_FIRST(new_screens),
272 int screen_count = 0;
273 TAILQ_FOREACH(screen, new_screens, screens) {
274 screen->num = screen_count;
275 screen->current_workspace = -1;
276 for (int c = 0; c < 10; c++)
277 if ((workspaces[c].screen != NULL) &&
278 (workspaces[c].screen->num == screen_count)) {
279 LOG("Found a matching screen\n");
280 /* Try to use the same workspace, if it’s available */
281 if (workspaces[c].screen->current_workspace)
282 screen->current_workspace = workspaces[c].screen->current_workspace;
284 if (screen->current_workspace == -1)
285 screen->current_workspace = c;
287 /* Re-use the old bar window */
288 screen->bar = workspaces[c].screen->bar;
289 screen->bargc = workspaces[c].screen->bargc;
291 Rect bar_rect = {screen->rect.x,
292 screen->rect.height - (font->height + 6),
293 screen->rect.x + screen->rect.width,
296 xcb_configure_window(conn, screen->bar, XCB_CONFIG_WINDOW_X |
297 XCB_CONFIG_WINDOW_Y |
298 XCB_CONFIG_WINDOW_WIDTH |
299 XCB_CONFIG_WINDOW_HEIGHT, &(bar_rect.x));
301 /* Copy the list head for the dock clients */
302 screen->dock_clients = workspaces[c].screen->dock_clients;
304 /* Update the dimensions */
305 memcpy(&(workspaces[c].rect), &(screen->rect), sizeof(Rect));
306 workspaces[c].screen = screen;
308 if (screen->current_workspace == -1) {
309 /* Create a new workspace for this screen, it’s new */
310 for (int c = 0; c < 10; c++)
311 if (workspaces[c].screen == NULL) {
312 LOG("fix: initializing new workspace, setting num to %d\n", c);
313 initialize_screen(conn, screen, &(workspaces[c]));
320 /* Check for workspaces which are out of bounds */
321 for (int c = 0; c < 10; c++) {
322 if ((workspaces[c].screen == NULL) || (workspaces[c].screen->num < num_screens))
325 /* f_ws is a shortcut to the workspace to fix */
326 Workspace *f_ws = &(workspaces[c]);
329 LOG("Closing bar window\n");
330 xcb_destroy_window(conn, f_ws->screen->bar);
332 LOG("Workspace %d's screen out of bounds, assigning to first screen\n", c+1);
333 f_ws->screen = first;
334 memcpy(&(f_ws->rect), &(first->rect), sizeof(Rect));
336 /* Force reconfiguration for each client on that workspace */
338 CIRCLEQ_FOREACH(client, &(f_ws->table[cols][rows]->clients), clients)
339 client->force_reconfigure = true;
341 /* Render the workspace to reconfigure the clients. However, they will be visible now, so… */
342 render_workspace(conn, first, f_ws);
344 /* …unless we want to see them at the moment, we should hide that workspace */
345 if (first->current_workspace == c)
348 unmap_workspace(conn, f_ws);
352 /* Free the old list */
353 while (!TAILQ_EMPTY(virtual_screens)) {
354 screen = TAILQ_FIRST(virtual_screens);
355 TAILQ_REMOVE(virtual_screens, screen, screens);
358 free(virtual_screens);
360 virtual_screens = new_screens;
362 LOG("Current workspace is now: %d\n", first->current_workspace);