X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=src%2Futil.c;h=c8f4ee389492962b8817b8be39737dcbed20362a;hb=a0e33c1d683ffe3b67a3967980f61f828b41fef2;hp=1263cdc4939e41bdff989d7b121618a7d0af270e;hpb=82dd64ff241b2dc376f44cea4e174a5face7c19d;p=i3%2Fi3 diff --git a/src/util.c b/src/util.c index 1263cdc4..c8f4ee38 100644 --- a/src/util.c +++ b/src/util.c @@ -1,26 +1,112 @@ -#include -#include -#include -#include +/* + * vim:ts=8:expandtab + * + * i3 - an improved dynamic tiling window manager + * + * © 2009 Michael Stapelberg and contributors + * + * See file LICENSE for license information. + * + * util.c: Utility functions, which can be useful everywhere. + * + */ +#include +#include +#include +#if defined(__OpenBSD__) +#include +#endif + +#include + +#include "all.h" + +static iconv_t conversion_descriptor = 0; -#include "i3.h" +int min(int a, int b) { + return (a < b ? a : b); +} + +int max(int a, int b) { + return (a > b ? a : b); +} + +bool rect_contains(Rect rect, uint32_t x, uint32_t y) { + return (x >= rect.x && + x <= (rect.x + rect.width) && + y >= rect.y && + y <= (rect.y + rect.height)); +} /* - * Starts the given application with the given args. + * Updates *destination with new_value and returns true if it was changed or false + * if it was the same * */ -void start_application(const char *path, const char *args) { - pid_t pid; - if ((pid = vfork()) == 0) { - /* This is the child */ - char *argv[2]; - /* TODO: For now, we ignore args. Later on, they should be parsed - correctly (like in the shell?) */ - argv[0] = strdup(path); - argv[1] = NULL; - execve(path, argv, environment); - /* not reached */ - } +bool update_if_necessary(uint32_t *destination, const uint32_t new_value) { + uint32_t old_value = *destination; + + return ((*destination = new_value) != old_value); +} + +/* + * The s* functions (safe) are wrappers around malloc, strdup, …, which exits if one of + * the called functions returns NULL, meaning that there is no more memory available + * + */ +void *smalloc(size_t size) { + void *result = malloc(size); + exit_if_null(result, "Error: out of memory (malloc(%zd))\n", size); + return result; +} + +void *scalloc(size_t size) { + void *result = calloc(size, 1); + exit_if_null(result, "Error: out of memory (calloc(%zd))\n", size); + return result; +} + +void *srealloc(void *ptr, size_t size) { + void *result = realloc(ptr, size); + exit_if_null(result, "Error: out memory (realloc(%zd))\n", size); + return result; +} + +char *sstrdup(const char *str) { + char *result = strdup(str); + exit_if_null(result, "Error: out of memory (strdup())\n"); + return result; +} + +/* + * Starts the given application by passing it through a shell. We use double fork + * to avoid zombie processes. As the started application’s parent exits (immediately), + * the application is reparented to init (process-id 1), which correctly handles + * childs, so we don’t have to do it :-). + * + * The shell is determined by looking for the SHELL environment variable. If it + * does not exist, /bin/sh is used. + * + */ +void start_application(const char *command) { + LOG("executing: %s\n", command); + if (fork() == 0) { + /* Child process */ + if (fork() == 0) { + /* Stores the path of the shell */ + static const char *shell = NULL; + + if (shell == NULL) + if ((shell = getenv("SHELL")) == NULL) + shell = "/bin/sh"; + + /* This is the child */ + execl(shell, shell, "-c", command, (void*)NULL); + /* not reached */ + } + exit(0); + } + wait(0); } /* @@ -28,11 +114,454 @@ void start_application(const char *path, const char *args) { * was an error. * */ -void check_error(xcb_connection_t *connection, xcb_void_cookie_t cookie, char *err_message) { - xcb_generic_error_t *error = xcb_request_check(connection, cookie); - if (error != NULL) { - fprintf(stderr, "ERROR: %s : %d\n", err_message , error->error_code); - xcb_disconnect(connection); - exit(-1); - } +void check_error(xcb_connection_t *conn, xcb_void_cookie_t cookie, char *err_message) { + xcb_generic_error_t *error = xcb_request_check(conn, cookie); + if (error != NULL) { + fprintf(stderr, "ERROR: %s (X error %d)\n", err_message , error->error_code); + xcb_disconnect(conn); + exit(-1); + } +} + +/* + * Converts the given string to UCS-2 big endian for use with + * xcb_image_text_16(). The amount of real glyphs is stored in real_strlen, + * a buffer containing the UCS-2 encoded string (16 bit per glyph) is + * returned. It has to be freed when done. + * + */ +char *convert_utf8_to_ucs2(char *input, int *real_strlen) { + size_t input_size = strlen(input) + 1; + /* UCS-2 consumes exactly two bytes for each glyph */ + int buffer_size = input_size * 2; + + char *buffer = smalloc(buffer_size); + size_t output_size = buffer_size; + /* We need to use an additional pointer, because iconv() modifies it */ + char *output = buffer; + + /* We convert the input into UCS-2 big endian */ + if (conversion_descriptor == 0) { + conversion_descriptor = iconv_open("UCS-2BE", "UTF-8"); + if (conversion_descriptor == 0) { + fprintf(stderr, "error opening the conversion context\n"); + exit(1); + } + } + + /* Get the conversion descriptor back to original state */ + iconv(conversion_descriptor, NULL, NULL, NULL, NULL); + + /* Convert our text */ + int rc = iconv(conversion_descriptor, (void*)&input, &input_size, &output, &output_size); + if (rc == (size_t)-1) { + perror("Converting to UCS-2 failed"); + if (real_strlen != NULL) + *real_strlen = 0; + return NULL; + } + + if (real_strlen != NULL) + *real_strlen = ((buffer_size - output_size) / 2) - 1; + + return buffer; +} +#if 0 + +/* + * Returns the client which comes next in focus stack (= was selected before) for + * the given container, optionally excluding the given client. + * + */ +Client *get_last_focused_client(xcb_connection_t *conn, Container *container, Client *exclude) { + Client *current; + SLIST_FOREACH(current, &(container->workspace->focus_stack), focus_clients) + if ((current->container == container) && ((exclude == NULL) || (current != exclude))) + return current; + return NULL; +} + + +/* + * Sets the given client as focused by updating the data structures correctly, + * updating the X input focus and finally re-decorating both windows (to signalize + * the user the new focus situation) + * + */ +void set_focus(xcb_connection_t *conn, Client *client, bool set_anyways) { + /* The dock window cannot be focused, but enter notifies are still handled correctly */ + if (client->dock) + return; + + /* Store the old client */ + Client *old_client = SLIST_FIRST(&(c_ws->focus_stack)); + + /* Check if the focus needs to be changed at all */ + if (!set_anyways && (old_client == client)) + return; + + /* Store current_row/current_col */ + c_ws->current_row = current_row; + c_ws->current_col = current_col; + c_ws = client->workspace; + ewmh_update_current_desktop(); + /* Load current_col/current_row if we switch to a client without a container */ + current_col = c_ws->current_col; + current_row = c_ws->current_row; + + /* Update container */ + if (client->container != NULL) { + client->container->currently_focused = client; + + current_col = client->container->col; + current_row = client->container->row; + } + + CLIENT_LOG(client); + /* Set focus to the entered window, and flush xcb buffer immediately */ + xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, client->child, XCB_CURRENT_TIME); + ewmh_update_active_window(client->child); + //xcb_warp_pointer(conn, XCB_NONE, client->child, 0, 0, 0, 0, 10, 10); + + if (client->container != NULL) { + /* Get the client which was last focused in this particular container, it may be a different + one than old_client */ + Client *last_focused = get_last_focused_client(conn, client->container, NULL); + + /* In stacking containers, raise the client in respect to the one which was focused before */ + if ((client->container->mode == MODE_STACK || client->container->mode == MODE_TABBED) && + client->container->workspace->fullscreen_client == NULL) { + /* We need to get the client again, this time excluding the current client, because + * we might have just gone into stacking mode and need to raise */ + Client *last_focused = get_last_focused_client(conn, client->container, client); + + if (last_focused != NULL) { + DLOG("raising above frame %p / child %p\n", last_focused->frame, last_focused->child); + uint32_t values[] = { last_focused->frame, XCB_STACK_MODE_ABOVE }; + xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_SIBLING | XCB_CONFIG_WINDOW_STACK_MODE, values); + } + } + + /* If it is the same one as old_client, we save us the unnecessary redecorate */ + if ((last_focused != NULL) && (last_focused != old_client)) + redecorate_window(conn, last_focused); + } + + /* If the last client was a floating client, we need to go to the next + * tiling client in stack and re-decorate it. */ + if (old_client != NULL && client_is_floating(old_client)) { + DLOG("Coming from floating client, searching next tiling...\n"); + Client *current; + SLIST_FOREACH(current, &(client->workspace->focus_stack), focus_clients) { + if (client_is_floating(current)) + continue; + + DLOG("Found window: %p / child %p\n", current->frame, current->child); + redecorate_window(conn, current); + break; + } + } + + SLIST_REMOVE(&(client->workspace->focus_stack), client, Client, focus_clients); + SLIST_INSERT_HEAD(&(client->workspace->focus_stack), client, focus_clients); + + /* Clear the urgency flag if set (necessary when i3 sets the flag, for + * example when automatically putting windows on the workspace of their + * leader) */ + client->urgent = false; + workspace_update_urgent_flag(client->workspace); + + /* If we’re in stacking mode, this renders the container to update changes in the title + bars and to raise the focused client */ + if ((old_client != NULL) && (old_client != client) && !old_client->dock) + redecorate_window(conn, old_client); + + /* redecorate_window flushes, so we don’t need to */ + redecorate_window(conn, client); +} + +/* + * Called when the user switches to another mode or when the container is + * destroyed and thus needs to be cleaned up. + * + */ +void leave_stack_mode(xcb_connection_t *conn, Container *container) { + /* When going out of stacking mode, we need to close the window */ + struct Stack_Window *stack_win = &(container->stack_win); + + SLIST_REMOVE(&stack_wins, stack_win, Stack_Window, stack_windows); + + xcb_free_gc(conn, stack_win->pixmap.gc); + xcb_free_pixmap(conn, stack_win->pixmap.id); + xcb_destroy_window(conn, stack_win->window); + + stack_win->rect.width = -1; + stack_win->rect.height = -1; } + +/* + * 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