273 lines
8.7 KiB
C
273 lines
8.7 KiB
C
#undef I3__FILE__
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#define I3__FILE__ "ewmh.c"
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/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
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*
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* ewmh.c: Get/set certain EWMH properties easily.
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*
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*/
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#include "all.h"
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xcb_window_t ewmh_window;
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/*
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* Updates _NET_CURRENT_DESKTOP with the current desktop number.
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*
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* EWMH: The index of the current desktop. This is always an integer between 0
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* and _NET_NUMBER_OF_DESKTOPS - 1.
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*
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*/
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void ewmh_update_current_desktop(void) {
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Con *focused_ws = con_get_workspace(focused);
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Con *output;
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uint32_t idx = 0;
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/* We count to get the index of this workspace because named workspaces
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* don’t have the ->num property */
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TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
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Con *ws;
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TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
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if (STARTS_WITH(ws->name, "__"))
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continue;
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if (ws == focused_ws) {
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
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A__NET_CURRENT_DESKTOP, XCB_ATOM_CARDINAL, 32, 1, &idx);
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return;
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}
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++idx;
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}
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}
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}
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/*
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* Updates _NET_NUMBER_OF_DESKTOPS which we interpret as the number of
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* noninternal workspaces.
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*/
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void ewmh_update_number_of_desktops(void) {
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Con *output;
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uint32_t idx = 0;
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TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
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Con *ws;
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TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
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if (STARTS_WITH(ws->name, "__"))
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continue;
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++idx;
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}
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}
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
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A__NET_NUMBER_OF_DESKTOPS, XCB_ATOM_CARDINAL, 32, 1, &idx);
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}
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/*
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* Updates _NET_DESKTOP_NAMES: "The names of all virtual desktops. This is a
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* list of NULL-terminated strings in UTF-8 encoding"
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*/
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void ewmh_update_desktop_names(void) {
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Con *output;
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int msg_length = 0;
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/* count the size of the property message to set */
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TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
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Con *ws;
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TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
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if (STARTS_WITH(ws->name, "__"))
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continue;
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msg_length += strlen(ws->name) + 1;
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}
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}
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char desktop_names[msg_length];
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int current_position = 0;
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/* fill the buffer with the names of the i3 workspaces */
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TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
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Con *ws;
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TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
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if (STARTS_WITH(ws->name, "__"))
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continue;
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for (size_t i = 0; i < strlen(ws->name) + 1; i++) {
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desktop_names[current_position++] = ws->name[i];
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}
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}
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}
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
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A__NET_DESKTOP_NAMES, A_UTF8_STRING, 8, msg_length, desktop_names);
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}
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/*
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* Updates _NET_DESKTOP_VIEWPORT, which is an array of pairs of cardinals that
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* define the top left corner of each desktop's viewport.
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*/
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void ewmh_update_desktop_viewport(void) {
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Con *output;
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int num_desktops = 0;
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/* count number of desktops */
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TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
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Con *ws;
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TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
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if (STARTS_WITH(ws->name, "__"))
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continue;
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num_desktops++;
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}
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}
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uint32_t viewports[num_desktops * 2];
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int current_position = 0;
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/* fill the viewport buffer */
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TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
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Con *ws;
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TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
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if (STARTS_WITH(ws->name, "__"))
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continue;
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viewports[current_position++] = output->rect.x;
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viewports[current_position++] = output->rect.y;
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}
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}
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
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A__NET_DESKTOP_VIEWPORT, XCB_ATOM_CARDINAL, 32, current_position, &viewports);
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}
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/*
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* Updates _NET_ACTIVE_WINDOW with the currently focused window.
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*
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* EWMH: The window ID of the currently active window or None if no window has
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* the focus.
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*
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*/
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void ewmh_update_active_window(xcb_window_t window) {
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
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A__NET_ACTIVE_WINDOW, XCB_ATOM_WINDOW, 32, 1, &window);
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}
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/*
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* Updates _NET_WM_VISIBLE_NAME.
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*
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*/
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void ewmh_update_visible_name(xcb_window_t window, const char *name) {
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if (name != NULL) {
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, window, A__NET_WM_VISIBLE_NAME, A_UTF8_STRING, 8, strlen(name), name);
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} else {
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xcb_delete_property(conn, window, A__NET_WM_VISIBLE_NAME);
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}
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}
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/*
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* i3 currently does not support _NET_WORKAREA, because it does not correspond
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* to i3’s concept of workspaces. See also:
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* http://bugs.i3wm.org/539
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* http://bugs.i3wm.org/301
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* http://bugs.i3wm.org/1038
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*
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* We need to actively delete this property because some display managers (e.g.
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* LightDM) set it.
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*
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* EWMH: Contains a geometry for each desktop. These geometries specify an area
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* that is completely contained within the viewport. Work area SHOULD be used by
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* desktop applications to place desktop icons appropriately.
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*
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*/
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void ewmh_update_workarea(void) {
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xcb_delete_property(conn, root, A__NET_WORKAREA);
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}
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/*
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* Updates the _NET_CLIENT_LIST hint.
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*
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*/
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void ewmh_update_client_list(xcb_window_t *list, int num_windows) {
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xcb_change_property(
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conn,
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XCB_PROP_MODE_REPLACE,
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root,
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A__NET_CLIENT_LIST,
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XCB_ATOM_WINDOW,
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32,
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num_windows,
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list);
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}
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/*
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* Updates the _NET_CLIENT_LIST_STACKING hint.
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*
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*/
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void ewmh_update_client_list_stacking(xcb_window_t *stack, int num_windows) {
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xcb_change_property(
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conn,
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XCB_PROP_MODE_REPLACE,
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root,
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A__NET_CLIENT_LIST_STACKING,
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XCB_ATOM_WINDOW,
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32,
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num_windows,
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stack);
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}
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/*
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* Set or remove _NET_WM_STATE_STICKY on the window.
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*
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*/
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void ewmh_update_sticky(xcb_window_t window, bool sticky) {
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if (sticky) {
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DLOG("Setting _NET_WM_STATE_STICKY for window = %d.\n", window);
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xcb_add_property_atom(conn, window, A__NET_WM_STATE, A__NET_WM_STATE_STICKY);
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} else {
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DLOG("Removing _NET_WM_STATE_STICKY for window = %d.\n", window);
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xcb_remove_property_atom(conn, window, A__NET_WM_STATE, A__NET_WM_STATE_STICKY);
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}
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}
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/*
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* Set up the EWMH hints on the root window.
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*
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*/
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void ewmh_setup_hints(void) {
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xcb_atom_t supported_atoms[] = {
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#define xmacro(atom) A_##atom,
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#include "atoms.xmacro"
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#undef xmacro
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};
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/* Set up the window manager’s name. According to EWMH, section "Root Window
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* Properties", to indicate that an EWMH-compliant window manager is
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* present, a child window has to be created (and kept alive as long as the
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* window manager is running) which has the _NET_SUPPORTING_WM_CHECK and
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* _NET_WM_ATOMS. */
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ewmh_window = xcb_generate_id(conn);
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/* We create the window and put it at (-1, -1) so that it is off-screen. */
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xcb_create_window(
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conn,
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XCB_COPY_FROM_PARENT, /* depth */
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ewmh_window, /* window id */
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root, /* parent */
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-1, -1, 1, 1, /* dimensions (x, y, w, h) */
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0, /* border */
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XCB_WINDOW_CLASS_INPUT_ONLY, /* window class */
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XCB_COPY_FROM_PARENT, /* visual */
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XCB_CW_OVERRIDE_REDIRECT,
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(uint32_t[]){1});
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, ewmh_window, A__NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32, 1, &ewmh_window);
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, ewmh_window, A__NET_WM_NAME, A_UTF8_STRING, 8, strlen("i3"), "i3");
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 32, 1, &ewmh_window);
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/* I’m not entirely sure if we need to keep _NET_WM_NAME on root. */
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_WM_NAME, A_UTF8_STRING, 8, strlen("i3"), "i3");
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/* only send the first 31 atoms (last one is _NET_CLOSE_WINDOW) increment that number when adding supported atoms */
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A__NET_SUPPORTED, XCB_ATOM_ATOM, 32, /* number of atoms */ 32, supported_atoms);
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/* We need to map this window to be able to set the input focus to it if no other window is available to be focused. */
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xcb_map_window(conn, ewmh_window);
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xcb_configure_window(conn, ewmh_window, XCB_CONFIG_WINDOW_STACK_MODE, (uint32_t[]){XCB_STACK_MODE_BELOW});
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}
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