From 761758b1365317bece61a87cfb401062f54f96dd Mon Sep 17 00:00:00 2001
From: Federico Terzi <federico-terzi@users.noreply.github.com>
Date: Sat, 18 Apr 2020 18:19:20 +0200
Subject: [PATCH] Speed up release of keys in fast inject mode

---
 native/liblinuxbridge/bridge.cpp | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/native/liblinuxbridge/bridge.cpp b/native/liblinuxbridge/bridge.cpp
index 417b8b6..df5c236 100644
--- a/native/liblinuxbridge/bridge.cpp
+++ b/native/liblinuxbridge/bridge.cpp
@@ -303,13 +303,35 @@ void send_enter() {
     xdo_send_keysequence_window(xdo_context, CURRENTWINDOW, "Return", 1000);
 }
 
+void fast_release_all_keys() {
+    Window focused;
+    int revert_to;
+    XGetInputFocus(xdo_context->xdpy, &focused, &revert_to);
+
+    char keys[32];
+    XQueryKeymap(xdo_context->xdpy, keys);  // Get the current status of the keyboard
+    for (int i = 0; i<32; i++) {
+        // Only those that show a keypress should be changed
+        if (keys[i] != 0) {
+            for (int k = 0; k<8; k++) {
+                if ((keys[i] & (1 << k)) != 0) {  // Bit by bit check
+                    int key_code = i*8 + k;
+                    fast_send_event(xdo_context, focused, keycode, 0);
+                }
+            }
+        }
+    }
+
+    XFlush(xdo_context->xdpy);
+}
+
 void fast_send_string(const char * string) {
     // It may happen that when an expansion is triggered, some keys are still pressed.
     // This causes a problem if the expanded match contains that character, as the injection
     // will not be able to register that keypress (as it is already pressed).
     // To solve the problem, before an expansion we get which keys are currently pressed
     // and inject a key_release event so that they can be further registered.
-    release_all_keys();
+    fast_release_all_keys();
 
     Window focused;
     int revert_to;