Allow multi key remappings in config file (#454)

* Use tree like structure to store keymaps

* Allow multi key keymaps in config file

* Allow multi key keymaps in insert mode

* Make keymap state self contained

* Add keymap! macro for ergonomic declaration

* Add descriptions for editor commands

* Allow keymap! to take multiple keys

* Restore infobox display

* Fix keymap merging and add infobox titles

* Fix and add tests for keymaps

* Clean up comments and apply suggestions

* Allow trailing commas in keymap!

* Remove mode suffixes from keymaps

* Preserve order of keys when showing infobox

* Make command descriptions smaller

* Strip infobox title prefix from items

* Strip infobox title prefix from items

1 files changed, 11 insertions, 1 deletions

diff --git a/helix-view/src/input.rs b/helix-view/src/input.rs
index 2847bb69..8d9ee6fb 100644
--- a/helix-view/src/input.rs
+++ b/helix-view/src/input.rs
@@ -14,6 +14,16 @@ pub struct KeyEvent {
     pub modifiers: KeyModifiers,
 }
 
+impl KeyEvent {
+    /// Get only the character involved in this event
+    pub fn char(&self) -> Option<char> {
+        match self.code {
+            KeyCode::Char(ch) => Some(ch),
+            _ => None,
+        }
+    }
+}
+
 pub(crate) mod keys {
     pub(crate) const BACKSPACE: &str = "backspace";
     pub(crate) const ENTER: &str = "ret";
@@ -168,7 +178,7 @@ impl std::str::FromStr for KeyEvent {
             keys::MINUS => KeyCode::Char('-'),
             keys::SEMICOLON => KeyCode::Char(';'),
             keys::PERCENT => KeyCode::Char('%'),
-            single if single.len() == 1 => KeyCode::Char(single.chars().next().unwrap()),
+            single if single.chars().count() == 1 => KeyCode::Char(single.chars().next().unwrap()),
             function if function.len() > 1 && function.starts_with('F') => {
                 let function: String = function.chars().skip(1).collect();
                 let function = str::parse::<u8>(&function)?;