2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
7 * ewmh.c: Get/set certain EWMH properties easily.
13 * Updates _NET_CURRENT_DESKTOP with the current desktop number.
15 * EWMH: The index of the current desktop. This is always an integer between 0
16 * and _NET_NUMBER_OF_DESKTOPS - 1.
19 void ewmh_update_current_desktop() {
20 Con *focused_ws = con_get_workspace(focused);
23 /* We count to get the index of this workspace because named workspaces
24 * don’t have the ->num property */
25 TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
27 TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
28 if (ws == focused_ws) {
29 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
30 A__NET_CURRENT_DESKTOP, XCB_ATOM_CARDINAL, 32, 1, &idx);
39 * Updates _NET_ACTIVE_WINDOW with the currently focused window.
41 * EWMH: The window ID of the currently active window or None if no window has
45 void ewmh_update_active_window(xcb_window_t window) {
46 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
47 A__NET_ACTIVE_WINDOW, XCB_ATOM_WINDOW, 32, 1, &window);
51 * Updates the workarea for each desktop.
53 * EWMH: Contains a geometry for each desktop. These geometries specify an area
54 * that is completely contained within the viewport. Work area SHOULD be used by
55 * desktop applications to place desktop icons appropriately.
58 void ewmh_update_workarea() {
59 int num_workspaces = 0, count = 0;
60 Rect last_rect = {0, 0, 0, 0};
63 TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
65 TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
66 /* Check if we need to initialize last_rect. The case that the
67 * first workspace is all-zero may happen when the user
68 * assigned workspace 2 for his first screen, for example. Thus
69 * we need an initialized last_rect in the very first run of
70 * the following loop. */
71 if (last_rect.width == 0 && last_rect.height == 0 &&
72 ws->rect.width != 0 && ws->rect.height != 0) {
73 memcpy(&last_rect, &(ws->rect), sizeof(Rect));
79 DLOG("Got %d workspaces\n", num_workspaces);
80 uint8_t *workarea = smalloc(sizeof(Rect) * num_workspaces);
81 TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
83 TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
84 DLOG("storing %d: %dx%d with %d x %d\n", count, ws->rect.x,
85 ws->rect.y, ws->rect.width, ws->rect.height);
86 /* If a workspace is not yet initialized and thus its
87 * dimensions are zero, we will instead put the dimensions
88 * of the last workspace in the list. For example firefox
89 * intersects all workspaces and does not cope so well with
90 * an all-zero workspace. */
91 if (ws->rect.width == 0 || ws->rect.height == 0) {
92 DLOG("re-using last_rect (%dx%d, %d, %d)\n",
93 last_rect.x, last_rect.y, last_rect.width,
95 memcpy(workarea + (sizeof(Rect) * count++), &last_rect, sizeof(Rect));
98 memcpy(workarea + (sizeof(Rect) * count++), &(ws->rect), sizeof(Rect));
99 memcpy(&last_rect, &(ws->rect), sizeof(Rect));
102 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
103 A__NET_WORKAREA, XCB_ATOM_CARDINAL, 32,
104 num_workspaces * (sizeof(Rect) / sizeof(uint32_t)),
111 * Updates the _NET_CLIENT_LIST_STACKING hint.
114 void ewmh_update_client_list_stacking(xcb_window_t *stack, int num_windows) {
117 XCB_PROP_MODE_REPLACE,
119 A__NET_CLIENT_LIST_STACKING,