feat(helix-tui): add configuration to manually enable/disable KKP (#14398)

helix-tui/src/backend/termina.rs

@@ -1,6 +1,7 @@
 use std::io::{self, Write as _};
 
 use helix_view::{
+    editor::KittyKeyboardProtocolConfig,
     graphics::{CursorKind, Rect, UnderlineStyle},
     theme::{Color, Modifier},
 };
@@ -147,6 +148,15 @@ impl TerminaBackend {
         let mut capabilities = Capabilities::default();
         let start = Instant::now();
 
+        capabilities.kitty_keyboard = match config.kitty_keyboard_protocol {
+            KittyKeyboardProtocolConfig::Disabled => KittyKeyboardSupport::None,
+            KittyKeyboardProtocolConfig::Enabled => KittyKeyboardSupport::Full,
+            KittyKeyboardProtocolConfig::Auto => {
+                write!(terminal, "{}", Csi::Keyboard(csi::Keyboard::QueryFlags))?;
+                KittyKeyboardSupport::None
+            }
+        };
+
         // Many terminal extensions can be detected by querying the terminal for the state of the
         // extension and then sending a request for the primary device attributes (which is
         // consistently supported by all terminals). If we receive the status of the feature (for
@@ -154,9 +164,7 @@ impl TerminaBackend {
         // If we only receive the device attributes then we know it is not.
         write!(
             terminal,
-            "{}{}{}{}{}{}{}",
-            // Kitty keyboard
-            Csi::Keyboard(csi::Keyboard::QueryFlags),
+            "{}{}{}{}{}{}",
             // Synchronized output
             Csi::Mode(csi::Mode::QueryDecPrivateMode(csi::DecPrivateMode::Code(
                 csi::DecPrivateModeCode::SynchronizedOutput

helix-tui/src/terminal.rs

@@ -2,7 +2,7 @@
 //! Frontend for [Backend]
 
 use crate::{backend::Backend, buffer::Buffer};
-use helix_view::editor::Config as EditorConfig;
+use helix_view::editor::{Config as EditorConfig, KittyKeyboardProtocolConfig};
 use helix_view::graphics::{CursorKind, Rect};
 use std::io;
 
@@ -25,6 +25,7 @@ pub struct Viewport {
 pub struct Config {
     pub enable_mouse_capture: bool,
     pub force_enable_extended_underlines: bool,
+    pub kitty_keyboard_protocol: KittyKeyboardProtocolConfig,
 }
 
 impl From<&EditorConfig> for Config {
@@ -32,6 +33,7 @@ impl From<&EditorConfig> for Config {
         Self {
             enable_mouse_capture: config.mouse,
             force_enable_extended_underlines: config.undercurl,
+            kitty_keyboard_protocol: config.kitty_keyboard_protocol,
         }
     }
 }