From ca93e6e2511d13b7041504e0665fff2d7a402c28 Mon Sep 17 00:00:00 2001
From: Ogulcan Celik <ogulcancelik@gmail.com>
Date: Mon, 30 Mar 2026 13:50:24 +0300
Subject: fix: send shifted printable keys as text input

---
 src/input/encode.rs | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

(limited to 'src/input/encode.rs')

diff --git a/src/input/encode.rs b/src/input/encode.rs
index 657fab80..b114935a 100644
--- a/src/input/encode.rs
+++ b/src/input/encode.rs
@@ -11,6 +11,10 @@ pub fn encode_key(key: KeyEvent, protocol: KeyboardProtocol) -> Vec<u8> {
 }
 
 pub fn encode_terminal_key(key: TerminalKey, protocol: KeyboardProtocol) -> Vec<u8> {
+    if let Some(bytes) = encode_text_input(&key) {
+        return bytes;
+    }
+
     if let KeyboardProtocol::Kitty { flags } = protocol {
         if let Some(bytes) = try_encode_csi_u(&key, flags) {
             return bytes;
@@ -187,6 +191,41 @@ fn kitty_modifier(mods: KeyModifiers) -> u32 {
     m
 }
 
+fn encode_text_input(key: &TerminalKey) -> Option<Vec<u8>> {
+    if key.modifiers != KeyModifiers::SHIFT {
+        return None;
+    }
+
+    let ch = match key.code {
+        KeyCode::Char(ch) => shifted_text_char(key, ch)?,
+        _ => return None,
+    };
+
+    match key.kind {
+        crossterm::event::KeyEventKind::Press | crossterm::event::KeyEventKind::Repeat => {
+            let mut buf = [0u8; 4];
+            Some(ch.encode_utf8(&mut buf).as_bytes().to_vec())
+        }
+        crossterm::event::KeyEventKind::Release => Some(Vec::new()),
+    }
+}
+
+fn shifted_text_char(key: &TerminalKey, ch: char) -> Option<char> {
+    if let Some(shifted) = key.shifted_codepoint.and_then(char::from_u32) {
+        return Some(shifted);
+    }
+
+    if ch.is_ascii_uppercase() {
+        return Some(ch);
+    }
+
+    if ch.is_ascii_lowercase() {
+        return Some(ch.to_ascii_uppercase());
+    }
+
+    None
+}
+
 fn canonical_kitty_char(ch: char, mods: KeyModifiers) -> char {
     if mods.contains(KeyModifiers::SHIFT) && ch.is_ascii_uppercase() {
         ch.to_ascii_lowercase()
-- 
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