Introduce con_activate_unblock

src/con.c

@@ -265,6 +265,41 @@ void con_activate(Con *con) {
     con_raise(con);
 }
 
+/*
+ * Activates the container like in con_activate but removes fullscreen
+ * restrictions and properly warps the pointer if needed.
+ *
+ */
+void con_activate_unblock(Con *con) {
+    Con *ws = con_get_workspace(con);
+    Con *previous_focus = focused;
+    Con *fullscreen_on_ws = con_get_fullscreen_covering_ws(ws);
+
+    if (fullscreen_on_ws && fullscreen_on_ws != con && !con_has_parent(con, fullscreen_on_ws)) {
+        con_disable_fullscreen(fullscreen_on_ws);
+    }
+
+    con_activate(con);
+
+    /* If the container is not on the current workspace, workspace_show() will
+     * switch to a different workspace and (if enabled) trigger a mouse pointer
+     * warp to the currently focused container (!) on the target workspace.
+     *
+     * Therefore, before calling workspace_show(), we make sure that 'con' will
+     * be focused on the workspace. However, we cannot just con_focus(con)
+     * because then the pointer will not be warped at all (the code thinks we
+     * are already there).
+     *
+     * So we focus 'con' to make it the currently focused window of the target
+     * workspace, then revert focus. */
+    if (ws != con_get_workspace(previous_focus)) {
+        con_activate(previous_focus);
+        /* Now switch to the workspace, then focus */
+        workspace_show(ws);
+        con_activate(con);
+    }
+}
+
 /*
  * Closes the given container.
  *