4 * i3 - an improved dynamic tiling window manager
6 * © 2009 Michael Stapelberg and contributors
8 * See file LICENSE for license information.
18 #include <xcb/xinerama.h>
30 /* This TAILQ of i3Screens stores the virtual screens, used for handling overlapping screens
31 * (xrandr --same-as) */
32 struct screens_head *virtual_screens;
34 static bool xinerama_enabled = true;
37 * Looks in virtual_screens for the i3Screen whose start coordinates are x, y
40 i3Screen *get_screen_at(int x, int y, struct screens_head *screenlist) {
42 TAILQ_FOREACH(screen, screenlist, screens)
43 if (screen->rect.x == x && screen->rect.y == y)
50 * Looks in virtual_screens for the i3Screen which contains coordinates x, y
53 i3Screen *get_screen_containing(int x, int y) {
55 TAILQ_FOREACH(screen, virtual_screens, screens) {
56 LOG("comparing x=%d y=%d with x=%d and y=%d width %d height %d\n",
57 x, y, screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height);
58 if (x >= screen->rect.x && x < (screen->rect.x + screen->rect.width) &&
59 y >= screen->rect.y && y < (screen->rect.y + screen->rect.height))
67 * Gets the screen which is the last one in the given direction, for example the screen
68 * on the most bottom when direction == D_DOWN, the screen most right when direction == D_RIGHT
71 * This function always returns a screen.
74 i3Screen *get_screen_most(direction_t direction) {
75 i3Screen *screen, *candidate = NULL;
77 TAILQ_FOREACH(screen, virtual_screens, screens) {
78 /* Repeated calls of WIN determine the winner of the comparison */
79 #define WIN(variable, condition) \
80 if (variable condition) { \
82 position = variable; \
88 WIN(screen->rect.y, <= position);
90 WIN(screen->rect.y, >= position);
92 WIN(screen->rect.x, <= position);
94 WIN(screen->rect.x, >= position);
98 assert(candidate != NULL);
104 * Fills virtual_screens with exactly one screen with width/height of the whole X server.
107 static void disable_xinerama(xcb_connection_t *conn) {
108 xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
110 i3Screen *s = calloc(sizeof(i3Screen), 1);
114 s->rect.width = root_screen->width_in_pixels;
115 s->rect.height = root_screen->height_in_pixels;
117 TAILQ_INSERT_TAIL(virtual_screens, s, screens);
119 xinerama_enabled = false;
123 * Gets the Xinerama screens and converts them to virtual i3Screens (only one screen for two
124 * Xinerama screen which are configured in clone mode) in the given screenlist
127 static void query_screens(xcb_connection_t *conn, struct screens_head *screenlist) {
128 xcb_xinerama_query_screens_reply_t *reply;
129 xcb_xinerama_screen_info_t *screen_info;
131 reply = xcb_xinerama_query_screens_reply(conn, xcb_xinerama_query_screens_unchecked(conn), NULL);
133 LOG("Couldn't get Xinerama screens\n");
136 screen_info = xcb_xinerama_query_screens_screen_info(reply);
137 int screens = xcb_xinerama_query_screens_screen_info_length(reply);
140 for (int screen = 0; screen < screens; screen++) {
141 i3Screen *s = get_screen_at(screen_info[screen].x_org, screen_info[screen].y_org, screenlist);
143 /* This screen already exists. We use the littlest screen so that the user
144 can always see the complete workspace */
145 s->rect.width = min(s->rect.width, screen_info[screen].width);
146 s->rect.height = min(s->rect.height, screen_info[screen].height);
148 s = calloc(sizeof(i3Screen), 1);
149 s->rect.x = screen_info[screen].x_org;
150 s->rect.y = screen_info[screen].y_org;
151 s->rect.width = screen_info[screen].width;
152 s->rect.height = screen_info[screen].height;
153 /* We always treat the screen at 0x0 as the primary screen */
154 if (s->rect.x == 0 && s->rect.y == 0)
155 TAILQ_INSERT_HEAD(screenlist, s, screens);
156 else TAILQ_INSERT_TAIL(screenlist, s, screens);
160 LOG("found Xinerama screen: %d x %d at %d x %d\n",
161 screen_info[screen].width, screen_info[screen].height,
162 screen_info[screen].x_org, screen_info[screen].y_org);
167 if (num_screens == 0) {
168 LOG("No screens found. This is weird.\n");
173 static void initialize_screen(xcb_connection_t *conn, i3Screen *screen, Workspace *workspace) {
174 i3Font *font = load_font(conn, config.font);
176 workspace->screen = screen;
177 screen->current_workspace = workspace->num;
179 /* Create a bar for each screen */
180 Rect bar_rect = {screen->rect.x,
181 screen->rect.height - (font->height + 6),
182 screen->rect.x + screen->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 screen->bar = create_window(conn, bar_rect, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_CURSOR_LEFT_PTR, mask, values);
187 screen->bargc = xcb_generate_id(conn);
188 xcb_create_gc(conn, screen->bargc, screen->bar, 0, 0);
190 SLIST_INIT(&(screen->dock_clients));
192 /* Copy dimensions */
193 memcpy(&(workspace->rect), &(screen->rect), sizeof(Rect));
194 LOG("that is virtual screen at %d x %d with %d x %d\n",
195 screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height);
199 * We have just established a connection to the X server and need the initial Xinerama
200 * information to setup workspaces for each screen.
203 void initialize_xinerama(xcb_connection_t *conn) {
204 virtual_screens = scalloc(sizeof(struct screens_head));
205 TAILQ_INIT(virtual_screens);
207 if (!xcb_get_extension_data(conn, &xcb_xinerama_id)->present) {
208 LOG("Xinerama extension not found, disabling.\n");
209 disable_xinerama(conn);
213 xcb_xinerama_is_active_reply_t *reply;
214 reply = xcb_xinerama_is_active_reply(conn, xcb_xinerama_is_active(conn), NULL);
216 if (reply == NULL || !reply->state) {
217 LOG("Xinerama is not active (in your X-Server), disabling.\n");
218 disable_xinerama(conn);
220 query_screens(conn, virtual_screens);
226 /* Just go through each workspace and associate as many screens as we can. */
227 TAILQ_FOREACH(s, virtual_screens, screens) {
228 s->num = num_screens;
229 initialize_screen(conn, s, &(workspaces[num_screens]));
235 * This is called when the rootwindow receives a configure_notify event and therefore the
236 * number/position of the Xinerama screens could have changed.
239 void xinerama_requery_screens(xcb_connection_t *conn) {
240 i3Font *font = load_font(conn, config.font);
242 /* POSSIBLE PROBLEM: Is the order of the Xinerama screens always constant? That is, can
243 it change when I move the --right-of video projector to --left-of? */
245 if (!xinerama_enabled) {
246 LOG("Xinerama is disabled\n");
250 /* We use a separate copy to diff with the previous set of screens */
251 struct screens_head *new_screens = scalloc(sizeof(struct screens_head));
252 TAILQ_INIT(new_screens);
254 query_screens(conn, new_screens);
256 i3Screen *first = TAILQ_FIRST(new_screens),
258 int screen_count = 0;
259 TAILQ_FOREACH(screen, new_screens, screens) {
260 screen->num = screen_count;
261 screen->current_workspace = -1;
262 for (int c = 0; c < 10; c++)
263 if ((workspaces[c].screen != NULL) &&
264 (workspaces[c].screen->num == screen_count)) {
265 LOG("Found a matching screen\n");
266 /* Try to use the same workspace, if it’s available */
267 if (workspaces[c].screen->current_workspace)
268 screen->current_workspace = workspaces[c].screen->current_workspace;
270 if (screen->current_workspace == -1)
271 screen->current_workspace = c;
273 /* Re-use the old bar window */
274 screen->bar = workspaces[c].screen->bar;
275 screen->bargc = workspaces[c].screen->bargc;
277 Rect bar_rect = {screen->rect.x,
278 screen->rect.height - (font->height + 6),
279 screen->rect.x + screen->rect.width,
282 xcb_configure_window(conn, screen->bar, XCB_CONFIG_WINDOW_X |
283 XCB_CONFIG_WINDOW_Y |
284 XCB_CONFIG_WINDOW_WIDTH |
285 XCB_CONFIG_WINDOW_HEIGHT, &(bar_rect.x));
287 /* Copy the list head for the dock clients */
288 screen->dock_clients = workspaces[c].screen->dock_clients;
290 /* Update the dimensions */
291 memcpy(&(workspaces[c].rect), &(screen->rect), sizeof(Rect));
292 workspaces[c].screen = screen;
294 if (screen->current_workspace == -1) {
295 /* Create a new workspace for this screen, it’s new */
296 for (int c = 0; c < 10; c++)
297 if (workspaces[c].screen == NULL) {
298 LOG("fix: initializing new workspace, setting num to %d\n", c);
299 initialize_screen(conn, screen, &(workspaces[c]));
306 /* Check for workspaces which are out of bounds */
307 for (int c = 0; c < 10; c++) {
308 if ((workspaces[c].screen == NULL) || (workspaces[c].screen->num < num_screens))
311 /* f_ws is a shortcut to the workspace to fix */
312 Workspace *f_ws = &(workspaces[c]);
315 LOG("Closing bar window\n");
316 xcb_destroy_window(conn, f_ws->screen->bar);
318 LOG("Workspace %d's screen out of bounds, assigning to first screen\n", c+1);
319 f_ws->screen = first;
320 memcpy(&(f_ws->rect), &(first->rect), sizeof(Rect));
322 /* Force reconfiguration for each client on that workspace */
324 CIRCLEQ_FOREACH(client, &(f_ws->table[cols][rows]->clients), clients)
325 client->force_reconfigure = true;
327 /* Render the workspace to reconfigure the clients. However, they will be visible now, so… */
328 render_workspace(conn, first, f_ws);
330 /* …unless we want to see them at the moment, we should hide that workspace */
331 if (first->current_workspace == c)
334 unmap_workspace(conn, f_ws);
338 /* Free the old list */
339 while (!TAILQ_EMPTY(virtual_screens)) {
340 screen = TAILQ_FIRST(virtual_screens);
341 TAILQ_REMOVE(virtual_screens, screen, screens);
344 free(virtual_screens);
346 virtual_screens = new_screens;
348 LOG("Current workspace is now: %d\n", first->current_workspace);