/* * vim:ts=8:expandtab * * i3 - an improved dynamic tiling window manager * * © 2009 Michael Stapelberg and contributors * * See file LICENSE for license information. * */ #include #include #include #include #include #include #include #include #include #include "queue.h" #include "i3.h" #include "data.h" #include "table.h" #include "util.h" #include "xinerama.h" #include "layout.h" #include "xcb.h" #include "config.h" #include "workspace.h" #include "log.h" /* This TAILQ of i3Screens stores the virtual screens, used for handling overlapping screens * (xrandr --same-as) */ struct screens_head *virtual_screens; static bool xinerama_enabled = true; /* * Returns true if both screen objects describe the same screen (checks their * size and position). * */ bool screens_are_equal(i3Screen *screen1, i3Screen *screen2) { /* If one of both objects (or both) are NULL, we cannot compare them */ if (screen1 == NULL || screen2 == NULL) return false; /* If the pointers are equal, take the short-circuit */ if (screen1 == screen2) return true; /* Compare their size - other properties are not relevant to determine * if a screen is equal to another one */ return (memcmp(&(screen1->rect), &(screen2->rect), sizeof(Rect)) == 0); } /* * Looks in virtual_screens for the i3Screen whose start coordinates are x, y * */ i3Screen *get_screen_at(int x, int y, struct screens_head *screenlist) { i3Screen *screen; TAILQ_FOREACH(screen, screenlist, screens) if (screen->rect.x == x && screen->rect.y == y) return screen; return NULL; } /* * Looks in virtual_screens for the i3Screen which contains coordinates x, y * */ i3Screen *get_screen_containing(int x, int y) { i3Screen *screen; TAILQ_FOREACH(screen, virtual_screens, screens) { DLOG("comparing x=%d y=%d with x=%d and y=%d width %d height %d\n", x, y, screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height); if (x >= screen->rect.x && x < (screen->rect.x + screen->rect.width) && y >= screen->rect.y && y < (screen->rect.y + screen->rect.height)) return screen; } return NULL; } /* * Gets the screen which is the last one in the given direction, for example the screen * on the most bottom when direction == D_DOWN, the screen most right when direction == D_RIGHT * and so on. * * This function always returns a screen. * */ i3Screen *get_screen_most(direction_t direction, i3Screen *current) { i3Screen *screen, *candidate = NULL; int position = 0; TAILQ_FOREACH(screen, virtual_screens, screens) { /* Repeated calls of WIN determine the winner of the comparison */ #define WIN(variable, condition) \ if (variable condition) { \ candidate = screen; \ position = variable; \ } \ break; if (((direction == D_UP) || (direction == D_DOWN)) && (current->rect.x != screen->rect.x)) continue; if (((direction == D_LEFT) || (direction == D_RIGHT)) && (current->rect.y != screen->rect.y)) continue; switch (direction) { case D_UP: WIN(screen->rect.y, <= position); case D_DOWN: WIN(screen->rect.y, >= position); case D_LEFT: WIN(screen->rect.x, <= position); case D_RIGHT: WIN(screen->rect.x, >= position); } } assert(candidate != NULL); return candidate; } static void initialize_screen(xcb_connection_t *conn, i3Screen *screen, Workspace *workspace) { i3Font *font = load_font(conn, config.font); workspace->screen = screen; screen->current_workspace = workspace; /* Create a bar for each screen */ Rect bar_rect = {screen->rect.x, screen->rect.y + screen->rect.height - (font->height + 6), screen->rect.x + screen->rect.width, font->height + 6}; uint32_t mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK; uint32_t values[] = {1, XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_BUTTON_PRESS}; screen->bar = create_window(conn, bar_rect, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_CURSOR_LEFT_PTR, true, mask, values); screen->bargc = xcb_generate_id(conn); xcb_create_gc(conn, screen->bargc, screen->bar, 0, 0); SLIST_INIT(&(screen->dock_clients)); DLOG("that is virtual screen at %d x %d with %d x %d\n", screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height); } /* * Fills virtual_screens with exactly one screen with width/height of the whole X server. * */ static void disable_xinerama(xcb_connection_t *conn) { xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data; i3Screen *s = calloc(sizeof(i3Screen), 1); s->rect.x = 0; s->rect.y = 0; s->rect.width = root_screen->width_in_pixels; s->rect.height = root_screen->height_in_pixels; num_screens = 1; s->num = 0; TAILQ_INSERT_TAIL(virtual_screens, s, screens); xinerama_enabled = false; } /* * Gets the Xinerama screens and converts them to virtual i3Screens (only one screen for two * Xinerama screen which are configured in clone mode) in the given screenlist * */ static void query_screens(xcb_connection_t *conn, struct screens_head *screenlist) { xcb_xinerama_query_screens_reply_t *reply; xcb_xinerama_screen_info_t *screen_info; time_t before_trying = time(NULL); /* Try repeatedly to find screens (there might be short timeframes in * which the X server does not return any screens, such as when rotating * screens), but not longer than 5 seconds (strictly speaking, only four * seconds of trying are guaranteed due to the 1-second-resolution) */ while ((time(NULL) - before_trying) < 10) { reply = xcb_xinerama_query_screens_reply(conn, xcb_xinerama_query_screens_unchecked(conn), NULL); if (!reply) { ELOG("Couldn't get Xinerama screens\n"); return; } screen_info = xcb_xinerama_query_screens_screen_info(reply); int screens = xcb_xinerama_query_screens_screen_info_length(reply); num_screens = 0; for (int screen = 0; screen < screens; screen++) { i3Screen *s = get_screen_at(screen_info[screen].x_org, screen_info[screen].y_org, screenlist); if (s != NULL) { DLOG("Re-used old Xinerama screen %p\n", s); /* This screen already exists. We use the littlest screen so that the user can always see the complete workspace */ s->rect.width = min(s->rect.width, screen_info[screen].width); s->rect.height = min(s->rect.height, screen_info[screen].height); } else { s = calloc(sizeof(i3Screen), 1); DLOG("Created new Xinerama screen %p\n", s); s->rect.x = screen_info[screen].x_org; s->rect.y = screen_info[screen].y_org; s->rect.width = screen_info[screen].width; s->rect.height = screen_info[screen].height; /* We always treat the screen at 0x0 as the primary screen */ if (s->rect.x == 0 && s->rect.y == 0) TAILQ_INSERT_HEAD(screenlist, s, screens); else TAILQ_INSERT_TAIL(screenlist, s, screens); num_screens++; } DLOG("found Xinerama screen: %d x %d at %d x %d\n", screen_info[screen].width, screen_info[screen].height, screen_info[screen].x_org, screen_info[screen].y_org); } free(reply); if (num_screens == 0) { ELOG("No screens found. This is weird. Trying again...\n"); /* Give the scheduler a chance to do something else * and don’t hog the CPU */ usleep(250); continue; } break; } if (num_screens == 0) { ELOG("No screens found for 10 seconds. Please fix your setup. i3 will exit now.\n"); exit(0); } } /* * We have just established a connection to the X server and need the initial Xinerama * information to setup workspaces for each screen. * */ void initialize_xinerama(xcb_connection_t *conn) { virtual_screens = scalloc(sizeof(struct screens_head)); TAILQ_INIT(virtual_screens); if (!xcb_get_extension_data(conn, &xcb_xinerama_id)->present) { DLOG("Xinerama extension not found, disabling.\n"); disable_xinerama(conn); } else { xcb_xinerama_is_active_reply_t *reply; reply = xcb_xinerama_is_active_reply(conn, xcb_xinerama_is_active(conn), NULL); if (reply == NULL || !reply->state) { DLOG("Xinerama is not active (in your X-Server), disabling.\n"); disable_xinerama(conn); } else query_screens(conn, virtual_screens); FREE(reply); } i3Screen *screen; num_screens = 0; /* Just go through each workspace and associate as many screens as we can. */ TAILQ_FOREACH(screen, virtual_screens, screens) { screen->num = num_screens; num_screens++; Workspace *ws = get_first_workspace_for_screen(virtual_screens, screen); initialize_screen(conn, screen, ws); } } /* * This is called when the rootwindow receives a configure_notify event and therefore the * number/position of the Xinerama screens could have changed. * */ void xinerama_requery_screens(xcb_connection_t *conn) { i3Font *font = load_font(conn, config.font); /* POSSIBLE PROBLEM: Is the order of the Xinerama screens always constant? That is, can it change when I move the --right-of video projector to --left-of? */ if (!xinerama_enabled) { DLOG("Xinerama is disabled\n"); return; } /* We use a separate copy to diff with the previous set of screens */ struct screens_head *new_screens = scalloc(sizeof(struct screens_head)); TAILQ_INIT(new_screens); query_screens(conn, new_screens); i3Screen *first = TAILQ_FIRST(new_screens), *screen, *old_screen; int screen_count = 0; /* Mark each workspace which currently is assigned to a screen, so we * can garbage-collect afterwards */ Workspace *ws; TAILQ_FOREACH(ws, workspaces, workspaces) ws->reassigned = (ws->screen == NULL); TAILQ_FOREACH(screen, new_screens, screens) { screen->num = screen_count; screen->current_workspace = NULL; TAILQ_FOREACH(old_screen, virtual_screens, screens) { if (old_screen->num != screen_count) continue; DLOG("Found a matching screen\n"); /* Use the same workspace */ screen->current_workspace = old_screen->current_workspace; /* Re-use the old bar window */ screen->bar = old_screen->bar; screen->bargc = old_screen->bargc; DLOG("old_screen->bar = %p\n", old_screen->bar); Rect bar_rect = {screen->rect.x, screen->rect.y + screen->rect.height - (font->height + 6), screen->rect.width, font->height + 6}; DLOG("configuring bar to be at %d x %d with %d x %d\n", bar_rect.x, bar_rect.y, bar_rect.height, bar_rect.width); xcb_configure_window(conn, screen->bar, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y | XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT, &(bar_rect.x)); /* Copy the list head for the dock clients */ screen->dock_clients = old_screen->dock_clients; SLIST_INIT(&(old_screen->dock_clients)); /* Update the dimensions */ Workspace *ws; TAILQ_FOREACH(ws, workspaces, workspaces) { if (ws->screen != old_screen) continue; DLOG("re-assigning ws %d\n", ws->num); memcpy(&(ws->rect), &(screen->rect), sizeof(Rect)); ws->screen = screen; ws->reassigned = true; } break; } if (screen->current_workspace == NULL) { /* Find the first unused workspace, preferring the ones * which are assigned to this screen and initialize * the screen with it. */ DLOG("getting first ws for screen %p\n", screen); Workspace *ws = get_first_workspace_for_screen(new_screens, screen); initialize_screen(conn, screen, ws); ws->reassigned = true; /* As this workspace just got visible (we got a new screen * without workspace), we need to map its clients */ workspace_map_clients(conn, ws); } screen_count++; } /* check for dock_clients which are out of bounds */ TAILQ_FOREACH(old_screen, virtual_screens, screens) { if (SLIST_EMPTY(&(old_screen->dock_clients))) continue; DLOG("dock_clients out of bounds at screen %p, reassigning\n", old_screen); if (SLIST_EMPTY(&(first->dock_clients))) { first->dock_clients = old_screen->dock_clients; continue; } /* We need to merge the lists */ Client *dock_client; while (!SLIST_EMPTY(&(old_screen->dock_clients))) { dock_client = SLIST_FIRST(&(old_screen->dock_clients)); SLIST_INSERT_HEAD(&(first->dock_clients), dock_client, dock_clients); SLIST_REMOVE_HEAD(&(old_screen->dock_clients), dock_clients); } } /* Check for workspaces which are out of bounds */ TAILQ_FOREACH(ws, workspaces, workspaces) { if (ws->reassigned) continue; DLOG("Closing bar window (%p)\n", ws->screen->bar); xcb_destroy_window(conn, ws->screen->bar); DLOG("Workspace %d's screen out of bounds, assigning to first screen\n", ws->num + 1); workspace_assign_to(ws, first); } xcb_flush(conn); /* Free the old list */ while (!TAILQ_EMPTY(virtual_screens)) { screen = TAILQ_FIRST(virtual_screens); TAILQ_REMOVE(virtual_screens, screen, screens); free(screen); } free(virtual_screens); virtual_screens = new_screens; /* Check for workspaces which need to be assigned to specific screens * which may now be available */ TAILQ_FOREACH(ws, workspaces, workspaces) { if (ws->preferred_screen == NULL || ws->screen == NULL) continue; workspace_initialize(ws, ws->screen, true); } DLOG("Current workspace is now: %d\n", first->current_workspace); render_layout(conn); }