gri3-wm/src/ewmh.c

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/*
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* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
*
* ewmh.c: Get/set certain EWMH properties easily.
*
*/
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#include "all.h"
/*
* Updates _NET_CURRENT_DESKTOP with the current desktop number.
*
* EWMH: The index of the current desktop. This is always an integer between 0
* and _NET_NUMBER_OF_DESKTOPS - 1.
*
*/
void ewmh_update_current_desktop() {
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Con *focused_ws = con_get_workspace(focused);
Con *output;
uint32_t idx = 0;
/* We count to get the index of this workspace because named workspaces
* dont have the ->num property */
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TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
Con *ws;
TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
if (ws == focused_ws) {
xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
A__NET_CURRENT_DESKTOP, XCB_ATOM_CARDINAL, 32, 1, &idx);
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return;
}
++idx;
}
}
}
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/*
* Updates _NET_ACTIVE_WINDOW with the currently focused window.
*
* EWMH: The window ID of the currently active window or None if no window has
* the focus.
*
*/
void ewmh_update_active_window(xcb_window_t window) {
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xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
A__NET_ACTIVE_WINDOW, XCB_ATOM_WINDOW, 32, 1, &window);
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}
/*
* Updates the workarea for each desktop.
*
* EWMH: Contains a geometry for each desktop. These geometries specify an area
* that is completely contained within the viewport. Work area SHOULD be used by
* desktop applications to place desktop icons appropriately.
*
*/
void ewmh_update_workarea() {
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int num_workspaces = 0, count = 0;
Rect last_rect = {0, 0, 0, 0};
Con *output;
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TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
Con *ws;
TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
/* Check if we need to initialize last_rect. The case that the
* first workspace is all-zero may happen when the user
* assigned workspace 2 for his first screen, for example. Thus
* we need an initialized last_rect in the very first run of
* the following loop. */
if (last_rect.width == 0 && last_rect.height == 0 &&
ws->rect.width != 0 && ws->rect.height != 0) {
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memcpy(&last_rect, &(ws->rect), sizeof(Rect));
}
num_workspaces++;
}
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}
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DLOG("Got %d workspaces\n", num_workspaces);
uint8_t *workarea = smalloc(sizeof(Rect) * num_workspaces);
TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
Con *ws;
TAILQ_FOREACH(ws, &(output_get_content(output)->nodes_head), nodes) {
DLOG("storing %d: %dx%d with %d x %d\n", count, ws->rect.x,
ws->rect.y, ws->rect.width, ws->rect.height);
/* If a workspace is not yet initialized and thus its
* dimensions are zero, we will instead put the dimensions
* of the last workspace in the list. For example firefox
* intersects all workspaces and does not cope so well with
* an all-zero workspace. */
if (ws->rect.width == 0 || ws->rect.height == 0) {
DLOG("re-using last_rect (%dx%d, %d, %d)\n",
last_rect.x, last_rect.y, last_rect.width,
last_rect.height);
memcpy(workarea + (sizeof(Rect) * count++), &last_rect, sizeof(Rect));
continue;
}
memcpy(workarea + (sizeof(Rect) * count++), &(ws->rect), sizeof(Rect));
memcpy(&last_rect, &(ws->rect), sizeof(Rect));
}
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}
xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
A__NET_WORKAREA, XCB_ATOM_CARDINAL, 32,
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num_workspaces * (sizeof(Rect) / sizeof(uint32_t)),
workarea);
free(workarea);
xcb_flush(conn);
}
/*
* Updates the _NET_CLIENT_LIST_STACKING hint.
*
*/
void ewmh_update_client_list_stacking(xcb_window_t *stack, int num_windows) {
xcb_change_property(
conn,
XCB_PROP_MODE_REPLACE,
root,
A__NET_CLIENT_LIST_STACKING,
XCB_ATOM_WINDOW,
32,
num_windows,
stack);
}