*
* i3 - an improved dynamic tiling window manager
*
- * (c) 2009 Michael Stapelberg and contributors
+ * © 2009 Michael Stapelberg and contributors
*
* See file LICENSE for license information.
*
+ * util.c: Utility functions, which can be useful everywhere.
+ *
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/wait.h>
+#include <stdarg.h>
+#include <assert.h>
+#include <iconv.h>
+#if defined(__OpenBSD__)
+#include <sys/cdefs.h>
+#endif
+
+#include <xcb/xcb_icccm.h>
#include "i3.h"
+#include "data.h"
+#include "table.h"
+#include "layout.h"
+#include "util.h"
+#include "xcb.h"
+#include "client.h"
+
+static iconv_t conversion_descriptor = 0;
+struct keyvalue_table_head by_parent = TAILQ_HEAD_INITIALIZER(by_parent);
+struct keyvalue_table_head by_child = TAILQ_HEAD_INITIALIZER(by_child);
+
+int min(int a, int b) {
+ return (a < b ? a : b);
+}
+
+int max(int a, int b) {
+ return (a > b ? a : b);
+}
+
+/*
+ * Logs the given message to stdout while prefixing the current time to it.
+ * This is to be called by LOG() which includes filename/linenumber
+ *
+ */
+void slog(char *fmt, ...) {
+ va_list args;
+ char timebuf[64];
+
+ va_start(args, fmt);
+ /* Get current time */
+ time_t t = time(NULL);
+ /* Convert time to local time (determined by the locale) */
+ struct tm *tmp = localtime(&t);
+ /* Generate time prefix */
+ strftime(timebuf, sizeof(timebuf), "%x %X - ", tmp);
+ printf("%s", timebuf);
+ vprintf(fmt, args);
+ va_end(args);
+}
+
+/*
+ * 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;
+}
+
+char *sstrdup(const char *str) {
+ char *result = strdup(str);
+ exit_if_null(result, "Error: out of memory (strdup())\n");
+ return result;
+}
+
+/*
+ * The table_* functions emulate the behaviour of libxcb-wm, which in libxcb 0.3.4 suddenly
+ * vanished. Great.
+ *
+ */
+bool table_put(struct keyvalue_table_head *head, uint32_t key, void *value) {
+ struct keyvalue_element *element = scalloc(sizeof(struct keyvalue_element));
+ element->key = key;
+ element->value = value;
+
+ TAILQ_INSERT_TAIL(head, element, elements);
+ return true;
+}
+
+void *table_remove(struct keyvalue_table_head *head, uint32_t key) {
+ struct keyvalue_element *element;
+
+ TAILQ_FOREACH(element, head, elements)
+ if (element->key == key) {
+ void *value = element->value;
+ TAILQ_REMOVE(head, element, elements);
+ free(element);
+ return value;
+ }
+
+ return NULL;
+}
+
+void *table_get(struct keyvalue_table_head *head, uint32_t key) {
+ struct keyvalue_element *element;
+
+ TAILQ_FOREACH(element, head, elements)
+ if (element->key == key)
+ return element->value;
+
+ return NULL;
+}
/*
* Starts the given application by passing it through a shell. We use double fork
* 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);
+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 : %d\n", err_message , error->error_code);
- xcb_disconnect(connection);
+ 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;
+}
+
+/*
+ * 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;
+ /* 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);
+ //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) {
+ LOG("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)) {
+ LOG("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;
+
+ LOG("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);
+
+ /* 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;
+
+ LOG("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) {
+ LOG("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;
+ }
+
+ LOG("Getting clients for class \"%s\" / title \"%s\"\n", to_class, to_title);
+ for (int workspace = 0; workspace < num_workspaces; workspace++) {
+ if (workspaces[workspace].screen == NULL)
+ continue;
+
+ Client *client;
+ SLIST_FOREACH(client, &(workspaces[workspace].focus_stack), focus_clients) {
+ LOG("Checking client with class=%s, name=%s\n", client->window_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;
+}
+
+#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
+
projects / i3 / i3 / blobdiff