2 #define I3__FILE__ "ewmh.c"
4 * vim:ts=4:sw=4:expandtab
6 * i3 - an improved dynamic tiling window manager
7 * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
9 * ewmh.c: Get/set certain EWMH properties easily.
15 * Updates _NET_CURRENT_DESKTOP with the current desktop number.
17 * EWMH: The index of the current desktop. This is always an integer between 0
18 * and _NET_NUMBER_OF_DESKTOPS - 1.
21 void ewmh_update_current_desktop(void) {
22 Con *focused_ws = con_get_workspace(focused);
25 /* We count to get the index of this workspace because named workspaces
26 * don’t have the ->num property */
27 TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
29 TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
30 if (ws == focused_ws) {
31 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
32 A__NET_CURRENT_DESKTOP, XCB_ATOM_CARDINAL, 32, 1, &idx);
41 * Updates _NET_ACTIVE_WINDOW with the currently focused window.
43 * EWMH: The window ID of the currently active window or None if no window has
47 void ewmh_update_active_window(xcb_window_t window) {
48 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
49 A__NET_ACTIVE_WINDOW, XCB_ATOM_WINDOW, 32, 1, &window);
53 * i3 currently does not support _NET_WORKAREA, because it does not correspond
54 * to i3’s concept of workspaces. See also:
55 * http://bugs.i3wm.org/539
56 * http://bugs.i3wm.org/301
57 * http://bugs.i3wm.org/1038
59 * We need to actively delete this property because some display managers (e.g.
62 * EWMH: Contains a geometry for each desktop. These geometries specify an area
63 * that is completely contained within the viewport. Work area SHOULD be used by
64 * desktop applications to place desktop icons appropriately.
67 void ewmh_update_workarea(void) {
68 xcb_delete_property(conn, root, A__NET_WORKAREA);
72 * Updates the _NET_CLIENT_LIST_STACKING hint.
75 void ewmh_update_client_list_stacking(xcb_window_t *stack, int num_windows) {
78 XCB_PROP_MODE_REPLACE,
80 A__NET_CLIENT_LIST_STACKING,
88 * Set up the EWMH hints on the root window.
91 void ewmh_setup_hints(void) {
92 xcb_atom_t supported_atoms[] = {
93 #define xmacro(atom) A_ ## atom,
94 #include "atoms.xmacro"
98 /* Set up the window manager’s name. According to EWMH, section "Root Window
99 * Properties", to indicate that an EWMH-compliant window manager is
100 * present, a child window has to be created (and kept alive as long as the
101 * window manager is running) which has the _NET_SUPPORTING_WM_CHECK and
103 xcb_window_t child_window = xcb_generate_id(conn);
106 XCB_COPY_FROM_PARENT, /* depth */
107 child_window, /* window id */
109 0, 0, 1, 1, /* dimensions (x, y, w, h) */
111 XCB_WINDOW_CLASS_INPUT_ONLY, /* window class */
112 XCB_COPY_FROM_PARENT, /* visual */
115 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, child_window, A__NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32, 1, &child_window);
116 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, child_window, A__NET_WM_NAME, A_UTF8_STRING, 8, strlen("i3"), "i3");
117 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32, 1, &child_window);
119 /* I’m not entirely sure if we need to keep _NET_WM_NAME on root. */
120 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_WM_NAME, A_UTF8_STRING, 8, strlen("i3"), "i3");
122 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTED, XCB_ATOM_ATOM, 32, 18, supported_atoms);