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 * Updates the workarea for each desktop.
55 * This function is not called at the moment due to:
56 * http://bugs.i3wm.org/539
57 * http://bugs.i3wm.org/301
59 * EWMH: Contains a geometry for each desktop. These geometries specify an area
60 * that is completely contained within the viewport. Work area SHOULD be used by
61 * desktop applications to place desktop icons appropriately.
64 void ewmh_update_workarea(void) {
65 int num_workspaces = 0, count = 0;
66 Rect last_rect = {0, 0, 0, 0};
69 TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
71 TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
72 /* Check if we need to initialize last_rect. The case that the
73 * first workspace is all-zero may happen when the user
74 * assigned workspace 2 for his first screen, for example. Thus
75 * we need an initialized last_rect in the very first run of
76 * the following loop. */
77 if (last_rect.width == 0 && last_rect.height == 0 &&
78 ws->rect.width != 0 && ws->rect.height != 0) {
79 memcpy(&last_rect, &(ws->rect), sizeof(Rect));
85 DLOG("Got %d workspaces\n", num_workspaces);
86 uint8_t *workarea = smalloc(sizeof(Rect) * num_workspaces);
87 TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
89 TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
90 DLOG("storing %d: %dx%d with %d x %d\n", count, ws->rect.x,
91 ws->rect.y, ws->rect.width, ws->rect.height);
92 /* If a workspace is not yet initialized and thus its
93 * dimensions are zero, we will instead put the dimensions
94 * of the last workspace in the list. For example firefox
95 * intersects all workspaces and does not cope so well with
96 * an all-zero workspace. */
97 if (ws->rect.width == 0 || ws->rect.height == 0) {
98 DLOG("re-using last_rect (%dx%d, %d, %d)\n",
99 last_rect.x, last_rect.y, last_rect.width,
101 memcpy(workarea + (sizeof(Rect) * count++), &last_rect, sizeof(Rect));
104 memcpy(workarea + (sizeof(Rect) * count++), &(ws->rect), sizeof(Rect));
105 memcpy(&last_rect, &(ws->rect), sizeof(Rect));
108 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
109 A__NET_WORKAREA, XCB_ATOM_CARDINAL, 32,
110 num_workspaces * (sizeof(Rect) / sizeof(uint32_t)),
117 * Updates the _NET_CLIENT_LIST_STACKING hint.
120 void ewmh_update_client_list_stacking(xcb_window_t *stack, int num_windows) {
123 XCB_PROP_MODE_REPLACE,
125 A__NET_CLIENT_LIST_STACKING,
133 * Set up the EWMH hints on the root window.
136 void ewmh_setup_hints(void) {
137 xcb_atom_t supported_atoms[] = {
138 #define xmacro(atom) A_ ## atom,
139 #include "atoms.xmacro"
143 /* Set up the window manager’s name. According to EWMH, section "Root Window
144 * Properties", to indicate that an EWMH-compliant window manager is
145 * present, a child window has to be created (and kept alive as long as the
146 * window manager is running) which has the _NET_SUPPORTING_WM_CHECK and
148 xcb_window_t child_window = xcb_generate_id(conn);
151 XCB_COPY_FROM_PARENT, /* depth */
152 child_window, /* window id */
154 0, 0, 1, 1, /* dimensions (x, y, w, h) */
156 XCB_WINDOW_CLASS_INPUT_ONLY, /* window class */
157 XCB_COPY_FROM_PARENT, /* visual */
160 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, child_window, A__NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32, 1, &child_window);
161 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, child_window, A__NET_WM_NAME, A_UTF8_STRING, 8, strlen("i3"), "i3");
162 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32, 1, &child_window);
164 /* I’m not entirely sure if we need to keep _NET_WM_NAME on root. */
165 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_WM_NAME, A_UTF8_STRING, 8, strlen("i3"), "i3");
167 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTED, XCB_ATOM_ATOM, 32, 16, supported_atoms);