+/*
+ * Handles the _NET_WM_STRUT_PARTIAL property for allocating space for dock clients.
+ *
+ */
+static bool handle_strut_partial_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
+ xcb_atom_t name, xcb_get_property_reply_t *prop) {
+ DLOG("strut partial change for window 0x%08x\n", window);
+
+ Con *con;
+ if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
+ return false;
+ }
+
+ if (prop == NULL) {
+ xcb_generic_error_t *err = NULL;
+ xcb_get_property_cookie_t strut_cookie = xcb_get_property(conn, false, window, A__NET_WM_STRUT_PARTIAL,
+ XCB_GET_PROPERTY_TYPE_ANY, 0, UINT32_MAX);
+ prop = xcb_get_property_reply(conn, strut_cookie, &err);
+
+ if (err != NULL) {
+ DLOG("got error when getting strut partial property: %d\n", err->error_code);
+ free(err);
+ return false;
+ }
+
+ if (prop == NULL) {
+ return false;
+ }
+ }
+
+ DLOG("That is con %p / %s\n", con, con->name);
+
+ window_update_strut_partial(con->window, prop);
+
+ /* we only handle this change for dock clients */
+ if (con->parent == NULL || con->parent->type != CT_DOCKAREA) {
+ return true;
+ }
+
+ Con *search_at = croot;
+ Con *output = con_get_output(con);
+ if (output != NULL) {
+ DLOG("Starting search at output %s\n", output->name);
+ search_at = output;
+ }
+
+ /* find out the desired position of this dock window */
+ if (con->window->reserved.top > 0 && con->window->reserved.bottom == 0) {
+ DLOG("Top dock client\n");
+ con->window->dock = W_DOCK_TOP;
+ } else if (con->window->reserved.top == 0 && con->window->reserved.bottom > 0) {
+ DLOG("Bottom dock client\n");
+ con->window->dock = W_DOCK_BOTTOM;
+ } else {
+ DLOG("Ignoring invalid reserved edges (_NET_WM_STRUT_PARTIAL), using position as fallback:\n");
+ if (con->geometry.y < (search_at->rect.height / 2)) {
+ DLOG("geom->y = %d < rect.height / 2 = %d, it is a top dock client\n",
+ con->geometry.y, (search_at->rect.height / 2));
+ con->window->dock = W_DOCK_TOP;
+ } else {
+ DLOG("geom->y = %d >= rect.height / 2 = %d, it is a bottom dock client\n",
+ con->geometry.y, (search_at->rect.height / 2));
+ con->window->dock = W_DOCK_BOTTOM;
+ }
+ }
+
+ /* find the dockarea */
+ Con *dockarea = con_for_window(search_at, con->window, NULL);
+ assert(dockarea != NULL);
+
+ /* attach the dock to the dock area */
+ con_detach(con);
+ con->parent = dockarea;
+ TAILQ_INSERT_HEAD(&(dockarea->focus_head), con, focused);
+ TAILQ_INSERT_HEAD(&(dockarea->nodes_head), con, nodes);
+
+ tree_render();
+
+ return true;
+}
+