+
+/*
+ * Switches the layout of the given container taking care of the necessary house-keeping
+ *
+ */
+void switch_layout_mode(xcb_connection_t *conn, Container *container, int mode) {
+ if (mode == MODE_STACK || mode == MODE_TABBED) {
+ /* When we’re already in stacking mode, nothing has to be done */
+ if ((mode == MODE_STACK && container->mode == MODE_STACK) ||
+ (mode == MODE_TABBED && container->mode == MODE_TABBED))
+ return;
+
+ if (container->mode == MODE_STACK || container->mode == MODE_TABBED)
+ goto after_stackwin;
+
+ /* When entering stacking mode, we need to open a window on
+ * which we can draw the title bars of the clients, it has
+ * height 1 because we don’t bother here with calculating the
+ * correct height - it will be adjusted when rendering anyways.
+ * Also, we need to use max(width, 1) because windows cannot
+ * be created with either width == 0 or height == 0. */
+ Rect rect = {container->x, container->y, max(container->width, 1), 1};
+
+ uint32_t mask = 0;
+ uint32_t values[2];
+
+ /* Don’t generate events for our new window, it should *not* be managed */
+ mask |= XCB_CW_OVERRIDE_REDIRECT;
+ values[0] = 1;
+
+ /* We want to know when… */
+ mask |= XCB_CW_EVENT_MASK;
+ values[1] = XCB_EVENT_MASK_ENTER_WINDOW | /* …mouse is moved into our window */
+ XCB_EVENT_MASK_BUTTON_PRESS | /* …mouse is pressed */
+ XCB_EVENT_MASK_EXPOSURE; /* …our window needs to be redrawn */
+
+ struct Stack_Window *stack_win = &(container->stack_win);
+ stack_win->window = create_window(conn, rect, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_CURSOR_LEFT_PTR, false, mask, values);
+
+ stack_win->rect.height = 0;
+
+ /* Initialize the entry for our cached pixmap. It will be
+ * created as soon as it’s needed (see cached_pixmap_prepare). */
+ memset(&(stack_win->pixmap), 0, sizeof(struct Cached_Pixmap));
+ stack_win->pixmap.referred_rect = &stack_win->rect;
+ stack_win->pixmap.referred_drawable = stack_win->window;
+
+ stack_win->container = container;
+
+ SLIST_INSERT_HEAD(&stack_wins, stack_win, stack_windows);
+ } else {
+ if (container->mode == MODE_STACK || container->mode == MODE_TABBED)
+ leave_stack_mode(conn, container);
+ }
+after_stackwin:
+ container->mode = mode;
+
+ /* Force reconfiguration of each client */
+ Client *client;
+
+ CIRCLEQ_FOREACH(client, &(container->clients), clients)
+ client->force_reconfigure = true;
+
+ render_layout(conn);
+
+ if (container->currently_focused != NULL) {
+ /* We need to make sure that this client is above *each* of the
+ * other clients in this container */
+ Client *last_focused = get_last_focused_client(conn, container, container->currently_focused);
+
+ CIRCLEQ_FOREACH(client, &(container->clients), clients) {
+ if (client == container->currently_focused || client == last_focused)
+ continue;
+
+ DLOG("setting %08x below %08x / %08x\n", client->frame, container->currently_focused->frame);
+ uint32_t values[] = { container->currently_focused->frame, XCB_STACK_MODE_BELOW };
+ xcb_configure_window(conn, client->frame,
+ XCB_CONFIG_WINDOW_SIBLING | XCB_CONFIG_WINDOW_STACK_MODE, values);
+ }
+
+ if (last_focused != NULL) {
+ DLOG("Putting last_focused directly underneath the currently focused\n");
+ uint32_t values[] = { container->currently_focused->frame, XCB_STACK_MODE_BELOW };
+ xcb_configure_window(conn, last_focused->frame,
+ XCB_CONFIG_WINDOW_SIBLING | XCB_CONFIG_WINDOW_STACK_MODE, values);
+ }
+
+
+ set_focus(conn, container->currently_focused, true);
+ }
+}
+
+/*
+ * Gets the first matching client for the given window class/window title.
+ * If the paramater specific is set to a specific client, only this one
+ * will be checked.
+ *
+ */
+Client *get_matching_client(xcb_connection_t *conn, const char *window_classtitle,
+ Client *specific) {
+ char *to_class, *to_title, *to_title_ucs = NULL;
+ int to_title_ucs_len = 0;
+ Client *matching = NULL;
+
+ to_class = sstrdup(window_classtitle);
+
+ /* If a title was specified, split both strings at the slash */
+ if ((to_title = strstr(to_class, "/")) != NULL) {
+ *(to_title++) = '\0';
+ /* Convert to UCS-2 */
+ to_title_ucs = convert_utf8_to_ucs2(to_title, &to_title_ucs_len);
+ }
+
+ /* If we were given a specific client we only check if that one matches */
+ if (specific != NULL) {
+ if (client_matches_class_name(specific, to_class, to_title, to_title_ucs, to_title_ucs_len))
+ matching = specific;
+ goto done;
+ }
+
+ DLOG("Getting clients for class \"%s\" / title \"%s\"\n", to_class, to_title);
+ Workspace *ws;
+ TAILQ_FOREACH(ws, workspaces, workspaces) {
+ if (ws->output == NULL)
+ continue;
+
+ Client *client;
+ SLIST_FOREACH(client, &(ws->focus_stack), focus_clients) {
+ DLOG("Checking client with class=%s / %s, name=%s\n", client->window_class_instance,
+ client->window_class_class, client->name);
+ if (!client_matches_class_name(client, to_class, to_title, to_title_ucs, to_title_ucs_len))
+ continue;
+
+ matching = client;
+ goto done;
+ }
+ }
+
+done:
+ free(to_class);
+ FREE(to_title_ucs);
+ return matching;
+}
+#endif
+
+/*
+ * Goes through the list of arguments (for exec()) and checks if the given argument
+ * is present. If not, it copies the arguments (because we cannot realloc it) and
+ * appends the given argument.
+ *
+ */
+static char **append_argument(char **original, char *argument) {
+ int num_args;
+ for (num_args = 0; original[num_args] != NULL; num_args++) {
+ DLOG("original argument: \"%s\"\n", original[num_args]);
+ /* If the argument is already present we return the original pointer */
+ if (strcmp(original[num_args], argument) == 0)
+ return original;
+ }
+ /* Copy the original array */
+ char **result = smalloc((num_args+2) * sizeof(char*));
+ memcpy(result, original, num_args * sizeof(char*));
+ result[num_args] = argument;
+ result[num_args+1] = NULL;
+
+ return result;
+}
+
+#define y(x, ...) yajl_gen_ ## x (gen, ##__VA_ARGS__)
+#define ystr(str) yajl_gen_string(gen, (unsigned char*)str, strlen(str))
+
+void store_restart_layout() {
+ yajl_gen gen = yajl_gen_alloc(NULL, NULL);
+
+ dump_node(gen, croot, true);
+
+ const unsigned char *payload;
+ unsigned int length;
+ y(get_buf, &payload, &length);
+
+ char *globbed = glob_path("~/.i3/_restart.json");
+ int fd = open(globbed, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
+ free(globbed);
+ if (fd == -1) {
+ perror("open()");
+ return;
+ }
+
+ int written = 0;
+ while (written < length) {
+ int n = write(fd, payload + written, length - written);
+ /* TODO: correct error-handling */
+ if (n == -1) {
+ perror("write()");
+ return;
+ }
+ if (n == 0) {
+ printf("write == 0?\n");
+ return;
+ }
+ written += n;
+ printf("written: %d of %d\n", written, length);
+ }
+ close(fd);
+
+ printf("layout: %.*s\n", length, payload);
+
+ y(free);
+}
+
+/*
+ * Restart i3 in-place
+ * appends -a to argument list to disable autostart
+ *
+ */
+void i3_restart() {
+ store_restart_layout();
+ restore_geometry();
+
+ //ipc_shutdown();
+
+ LOG("restarting \"%s\"...\n", start_argv[0]);
+ /* make sure -a is in the argument list or append it */
+ start_argv = append_argument(start_argv, "-a");
+
+ execvp(start_argv[0], start_argv);
+ /* not reached */
+}
+
+#if 0
+
+#if defined(__OpenBSD__)
+
+/*
+ * Taken from FreeBSD
+ * Find the first occurrence of the byte string s in byte string l.
+ *
+ */
+void *memmem(const void *l, size_t l_len, const void *s, size_t s_len) {
+ register char *cur, *last;
+ const char *cl = (const char *)l;
+ const char *cs = (const char *)s;
+
+ /* we need something to compare */
+ if (l_len == 0 || s_len == 0)
+ return NULL;
+
+ /* "s" must be smaller or equal to "l" */
+ if (l_len < s_len)
+ return NULL;
+
+ /* special case where s_len == 1 */
+ if (s_len == 1)
+ return memchr(l, (int)*cs, l_len);
+
+ /* the last position where its possible to find "s" in "l" */
+ last = (char *)cl + l_len - s_len;
+
+ for (cur = (char *)cl; cur <= last; cur++)
+ if (cur[0] == cs[0] && memcmp(cur, cs, s_len) == 0)
+ return cur;
+
+ return NULL;
+}
+
+#endif
+#endif