Send WM_TAKE_FOCUS when setting focus (fixes java problems)

include/i3.h

@@ -21,7 +21,7 @@
 #ifndef _I3_H
 #define _I3_H
 
-#define NUM_ATOMS 21
+#define NUM_ATOMS 22
 
 extern xcb_connection_t *global_conn;
 extern xcb_key_symbols_t *keysyms;

include/util.h

@@ -126,6 +126,12 @@ char *convert_utf8_to_ucs2(char *input, int *real_strlen);
 Client *get_last_focused_client(xcb_connection_t *conn, Container *container,
                                 Client *exclude);
 
+/**
+ * Sends WM_TAKE_FOCUS to the client
+ *
+ */
+void take_focus(xcb_connection_t *conn, Client *client);
+
 /**
  * Sets the given client as focused by updating the data structures correctly,
  * updating the X input focus and finally re-decorating both windows (to

include/xcb.h

@@ -64,7 +64,8 @@ enum { _NET_SUPPORTED = 0,
         WM_CLIENT_LEADER,
         _NET_CURRENT_DESKTOP,
         _NET_ACTIVE_WINDOW,
-        _NET_WORKAREA
+        _NET_WORKAREA,
+        WM_TAKE_FOCUS
 };
 
 extern unsigned int xcb_numlock_mask;

src/mainx.c

@@ -326,6 +326,7 @@ int main(int argc, char *argv[], char *env[]) {
         REQUEST_ATOM(_NET_CURRENT_DESKTOP);
         REQUEST_ATOM(_NET_ACTIVE_WINDOW);
         REQUEST_ATOM(_NET_WORKAREA);
+        REQUEST_ATOM(WM_TAKE_FOCUS);
 
         /* TODO: this has to be more beautiful somewhen */
         int major, minor, error;
@@ -491,6 +492,7 @@ int main(int argc, char *argv[], char *env[]) {
         GET_ATOM(_NET_CURRENT_DESKTOP);
         GET_ATOM(_NET_ACTIVE_WINDOW);
         GET_ATOM(_NET_WORKAREA);
+        GET_ATOM(WM_TAKE_FOCUS);
 
         xcb_property_set_handler(&prophs, atoms[_NET_WM_WINDOW_TYPE], UINT_MAX, handle_window_type, NULL);
         /* TODO: In order to comply with EWMH, we have to watch _NET_WM_STRUT_PARTIAL */

src/manage.c

@@ -512,6 +512,7 @@ map:
                         }
                         if (new->container == CUR_CELL || client_is_floating(new)) {
                                 xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, new->child, XCB_CURRENT_TIME);
+                                take_focus(conn, new);
                                 ewmh_update_active_window(new->child);
                         }
                 }

src/util.c

@@ -222,6 +222,25 @@ Client *get_last_focused_client(xcb_connection_t *conn, Container *container, Cl
         return NULL;
 }
 
+/*
+ * Sends WM_TAKE_FOCUS to the client
+ *
+ */
+void take_focus(xcb_connection_t *conn, Client *client) {
+    xcb_client_message_event_t ev;
+
+    memset(&ev, 0, sizeof(xcb_client_message_event_t));
+
+    ev.response_type = XCB_CLIENT_MESSAGE;
+    ev.window = client->child;
+    ev.type = atoms[WM_PROTOCOLS];
+    ev.format = 32;
+    ev.data.data32[0] = atoms[WM_TAKE_FOCUS];
+    ev.data.data32[1] = XCB_CURRENT_TIME;
+
+    DLOG("Sending WM_TAKE_FOCUS to the client\n");
+    xcb_send_event(conn, false, client->child, XCB_EVENT_MASK_NO_EVENT, (char*)&ev);
+}
 
 /*
  * Sets the given client as focused by updating the data structures correctly,
@@ -261,6 +280,7 @@ void set_focus(xcb_connection_t *conn, Client *client, bool set_anyways) {
         CLIENT_LOG(client);
         /* Set focus to the entered window, and flush xcb buffer immediately */
         xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, client->child, XCB_CURRENT_TIME);
+        take_focus(conn, client);
         ewmh_update_active_window(client->child);
         //xcb_warp_pointer(conn, XCB_NONE, client->child, 0, 0, 0, 0, 10, 10);