From 2b67891ca2d9e78cda3d03c875ab437882e0e97b Mon Sep 17 00:00:00 2001
From: Armin Friedl <dev@friedl.net>
Date: Sat, 16 Apr 2022 09:06:09 +0200
Subject: [PATCH] Disable tabbing out by grabbing keyboard

We grab the keyboard and bind it to the roftl window. This works as long
as there is no other window grabbing the keyboard afterwards (and
effectively stealing the keyboard from roftl).

This is done so tabbing out of roftl (and hence loosing focus) is not
possible.
---
 src/main.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/main.rs b/src/main.rs
index 304574b..51ecafd 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -76,6 +76,22 @@ fn main() -> Result<(), Box<dyn Error>> {
         xcb_util::ewmh::CLIENT_SOURCE_TYPE_NORMAL,
     );
 
+    debug! {"Grab keyboard, disable tabbing out"}
+    let xcb_conn = unsafe {
+        xcb::Connection::from_raw_conn(
+            window.xcb_connection().unwrap() as *mut xcb::ffi::xcb_connection_t
+        )
+    };
+
+    xcb::xproto::grab_keyboard(
+        &xcb_conn,
+        true,
+        xcb_window,
+        xcb::ffi::base::XCB_CURRENT_TIME,
+        xcb::xproto::GRAB_MODE_ASYNC as u8,
+        xcb::xproto::GRAB_MODE_ASYNC as u8,
+    );
+
     debug! {"Window id: {:?}", window.id()}
 
     debug! {"Draw primary state to window"}