+
+/*
+ * Handles FocusIn events which are generated by clients (i3’s focus changes
+ * don’t generate FocusIn events due to a different EventMask) and updates the
+ * decorations accordingly.
+ *
+ */
+static int handle_focus_in(xcb_focus_in_event_t *event) {
+ DLOG("focus change in, for window 0x%08x\n", event->event);
+ Con *con;
+ if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL)
+ return 1;
+ DLOG("That is con %p / %s\n", con, con->name);
+
+ if (event->mode == XCB_NOTIFY_MODE_GRAB ||
+ event->mode == XCB_NOTIFY_MODE_UNGRAB) {
+ DLOG("FocusIn event for grab/ungrab, ignoring\n");
+ return 1;
+ }
+
+ if (event->detail == XCB_NOTIFY_DETAIL_POINTER) {
+ DLOG("notify detail is pointer, ignoring this event\n");
+ return 1;
+ }
+
+ if (focused_id == event->event) {
+ DLOG("focus matches the currently focused window, not doing anything\n");
+ return 1;
+ }
+
+ DLOG("focus is different, updating decorations\n");
+ con_focus(con);
+ /* We update focused_id because we don’t need to set focus again */
+ focused_id = event->event;
+ x_push_changes(croot);
+ return 1;
+}
+
+typedef int (*cb_property_handler_t)(void *data, xcb_connection_t *c, uint8_t state, xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *property);
+
+struct property_handler_t {
+ xcb_atom_t atom;
+ uint32_t long_len;
+ cb_property_handler_t cb;
+};
+
+static struct property_handler_t property_handlers[] = {
+ { 0, 128, handle_windowname_change },
+ { 0, UINT_MAX, handle_hints },
+ { 0, 128, handle_windowname_change_legacy },
+ { 0, UINT_MAX, handle_normal_hints },
+ { 0, UINT_MAX, handle_clientleader_change },
+ { 0, UINT_MAX, handle_transient_for }
+};
+#define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t))
+
+/*
+ * Sets the appropriate atoms for the property handlers after the atoms were
+ * received from X11
+ *
+ */
+void property_handlers_init() {
+ property_handlers[0].atom = A__NET_WM_NAME;
+ property_handlers[1].atom = A_WM_HINTS;
+ property_handlers[2].atom = A_WM_NAME;
+ property_handlers[3].atom = A_WM_NORMAL_HINTS;
+ property_handlers[4].atom = A_WM_CLIENT_LEADER;
+ property_handlers[5].atom = A_WM_TRANSIENT_FOR;
+}
+
+static int property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) {
+ struct property_handler_t *handler = NULL;
+ xcb_get_property_reply_t *propr = NULL;
+ int ret;
+
+ for (int c = 0; c < sizeof(property_handlers) / sizeof(struct property_handler_t); c++) {
+ if (property_handlers[c].atom != atom)
+ continue;
+
+ handler = &property_handlers[c];
+ break;
+ }
+
+ if (handler == NULL) {
+ DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom);
+ return 0;
+ }
+
+ if (state != XCB_PROPERTY_DELETE) {
+ xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len);
+ propr = xcb_get_property_reply(conn, cookie, 0);
+ }
+
+ ret = handler->cb(NULL, conn, state, window, atom, propr);
+ FREE(propr);
+ return ret;
+}
+
+/*
+ * Takes an xcb_generic_event_t and calls the appropriate handler, based on the
+ * event type.
+ *
+ */
+void handle_event(int type, xcb_generic_event_t *event) {
+ if (randr_base > -1 &&
+ type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
+ handle_screen_change(event);
+ return;
+ }
+
+ switch (type) {
+ case XCB_KEY_PRESS:
+ handle_key_press((xcb_key_press_event_t*)event);
+ break;
+
+ case XCB_BUTTON_PRESS:
+ handle_button_press((xcb_button_press_event_t*)event);
+ break;
+
+ case XCB_MAP_REQUEST:
+ handle_map_request((xcb_map_request_event_t*)event);
+ break;
+
+ case XCB_UNMAP_NOTIFY:
+ handle_unmap_notify_event((xcb_unmap_notify_event_t*)event);
+ break;
+
+ case XCB_DESTROY_NOTIFY:
+ handle_destroy_notify_event((xcb_destroy_notify_event_t*)event);
+ break;
+
+ case XCB_EXPOSE:
+ handle_expose_event((xcb_expose_event_t*)event);
+ break;
+
+ case XCB_MOTION_NOTIFY:
+ handle_motion_notify((xcb_motion_notify_event_t*)event);
+ break;
+
+ /* Enter window = user moved his mouse over the window */
+ case XCB_ENTER_NOTIFY:
+ handle_enter_notify((xcb_enter_notify_event_t*)event);
+ break;
+
+ /* Client message are sent to the root window. The only interesting
+ * client message for us is _NET_WM_STATE, we honour
+ * _NET_WM_STATE_FULLSCREEN */
+ case XCB_CLIENT_MESSAGE:
+ handle_client_message((xcb_client_message_event_t*)event);
+ break;
+
+ /* Configure request = window tried to change size on its own */
+ case XCB_CONFIGURE_REQUEST:
+ handle_configure_request((xcb_configure_request_event_t*)event);
+ break;
+
+ /* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
+ case XCB_MAPPING_NOTIFY:
+ handle_mapping_notify((xcb_mapping_notify_event_t*)event);
+ break;
+
+ case XCB_FOCUS_IN:
+ handle_focus_in((xcb_focus_in_event_t*)event);
+ break;
+
+ case XCB_PROPERTY_NOTIFY:
+ DLOG("Property notify\n");
+ xcb_property_notify_event_t *e = (xcb_property_notify_event_t*)event;
+ property_notify(e->state, e->window, e->atom);
+ break;
+
+ default:
+ DLOG("Unhandled event of type %d\n", type);
+ break;
+ }
+}