2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
6 * © 2009-2011 Michael Stapelberg and contributors
8 * See file LICENSE for license information.
10 * ewmh.c: Functions to get/set certain EWMH properties easily.
17 * Updates _NET_CURRENT_DESKTOP with the current desktop number.
19 * EWMH: The index of the current desktop. This is always an integer between 0
20 * and _NET_NUMBER_OF_DESKTOPS - 1.
23 void ewmh_update_current_desktop() {
24 Con *focused_ws = con_get_workspace(focused);
27 /* We count to get the index of this workspace because named workspaces
28 * don’t have the ->num property */
29 TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
31 TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
32 if (ws == focused_ws) {
33 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
34 A__NET_CURRENT_DESKTOP, A_CARDINAL, 32, 1, &idx);
43 * Updates _NET_ACTIVE_WINDOW with the currently focused window.
45 * EWMH: The window ID of the currently active window or None if no window has
49 void ewmh_update_active_window(xcb_window_t window) {
50 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
51 A__NET_ACTIVE_WINDOW, A_WINDOW, 32, 1, &window);
55 * Updates the workarea for each desktop.
57 * EWMH: Contains a geometry for each desktop. These geometries specify an area
58 * that is completely contained within the viewport. Work area SHOULD be used by
59 * desktop applications to place desktop icons appropriately.
62 void ewmh_update_workarea() {
63 int num_workspaces = 0, count = 0;
64 Rect last_rect = {0, 0, 0, 0};
67 TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
69 TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
70 /* Check if we need to initialize last_rect. The case that the
71 * first workspace is all-zero may happen when the user
72 * assigned workspace 2 for his first screen, for example. Thus
73 * we need an initialized last_rect in the very first run of
74 * the following loop. */
75 if (last_rect.width == 0 && last_rect.height == 0 &&
76 ws->rect.width != 0 && ws->rect.height != 0) {
77 memcpy(&last_rect, &(ws->rect), sizeof(Rect));
83 DLOG("Got %d workspaces\n", num_workspaces);
84 uint8_t *workarea = smalloc(sizeof(Rect) * num_workspaces);
85 TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
87 TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
88 DLOG("storing %d: %dx%d with %d x %d\n", count, ws->rect.x,
89 ws->rect.y, ws->rect.width, ws->rect.height);
90 /* If a workspace is not yet initialized and thus its
91 * dimensions are zero, we will instead put the dimensions
92 * of the last workspace in the list. For example firefox
93 * intersects all workspaces and does not cope so well with
94 * an all-zero workspace. */
95 if (ws->rect.width == 0 || ws->rect.height == 0) {
96 DLOG("re-using last_rect (%dx%d, %d, %d)\n",
97 last_rect.x, last_rect.y, last_rect.width,
99 memcpy(workarea + (sizeof(Rect) * count++), &last_rect, sizeof(Rect));
102 memcpy(workarea + (sizeof(Rect) * count++), &(ws->rect), sizeof(Rect));
103 memcpy(&last_rect, &(ws->rect), sizeof(Rect));
106 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
107 A__NET_WORKAREA, A_CARDINAL, 32,
108 num_workspaces * (sizeof(Rect) / sizeof(uint32_t)),