simplify some keymap key names (#2677)

book/src/remapping.md

@@ -33,12 +33,7 @@ Control, Shift and Alt modifiers are encoded respectively with the prefixes
 | Backspace    | `"backspace"`  |
 | Space        | `"space"`      |
 | Return/Enter | `"ret"`        |
-| <            | `"lt"`         |
-| \>           | `"gt"`         |
-| \+           | `"plus"`       |
 | \-           | `"minus"`      |
-| ;            | `"semicolon"`  |
-| %            | `"percent"`    |
 | Left         | `"left"`       |
 | Right        | `"right"`      |
 | Up           | `"up"`         |

helix-view/src/input.rs

@@ -41,12 +41,7 @@ pub(crate) mod keys {
     pub(crate) const NULL: &str = "null";
     pub(crate) const ESC: &str = "esc";
     pub(crate) const SPACE: &str = "space";
-    pub(crate) const LESS_THAN: &str = "lt";
-    pub(crate) const GREATER_THAN: &str = "gt";
-    pub(crate) const PLUS: &str = "plus";
     pub(crate) const MINUS: &str = "minus";
-    pub(crate) const SEMICOLON: &str = "semicolon";
-    pub(crate) const PERCENT: &str = "percent";
 }
 
 impl fmt::Display for KeyEvent {
@@ -86,12 +81,7 @@ impl fmt::Display for KeyEvent {
             KeyCode::Null => f.write_str(keys::NULL)?,
             KeyCode::Esc => f.write_str(keys::ESC)?,
             KeyCode::Char(' ') => f.write_str(keys::SPACE)?,
-            KeyCode::Char('<') => f.write_str(keys::LESS_THAN)?,
-            KeyCode::Char('>') => f.write_str(keys::GREATER_THAN)?,
-            KeyCode::Char('+') => f.write_str(keys::PLUS)?,
             KeyCode::Char('-') => f.write_str(keys::MINUS)?,
-            KeyCode::Char(';') => f.write_str(keys::SEMICOLON)?,
-            KeyCode::Char('%') => f.write_str(keys::PERCENT)?,
             KeyCode::F(i) => f.write_fmt(format_args!("F{}", i))?,
             KeyCode::Char(c) => f.write_fmt(format_args!("{}", c))?,
         };
@@ -119,12 +109,7 @@ impl UnicodeWidthStr for KeyEvent {
             KeyCode::Null => keys::NULL.len(),
             KeyCode::Esc => keys::ESC.len(),
             KeyCode::Char(' ') => keys::SPACE.len(),
-            KeyCode::Char('<') => keys::LESS_THAN.len(),
-            KeyCode::Char('>') => keys::GREATER_THAN.len(),
-            KeyCode::Char('+') => keys::PLUS.len(),
             KeyCode::Char('-') => keys::MINUS.len(),
-            KeyCode::Char(';') => keys::SEMICOLON.len(),
-            KeyCode::Char('%') => keys::PERCENT.len(),
             KeyCode::F(1..=9) => 2,
             KeyCode::F(_) => 3,
             KeyCode::Char(c) => c.width().unwrap_or(0),
@@ -168,12 +153,7 @@ impl std::str::FromStr for KeyEvent {
             keys::NULL => KeyCode::Null,
             keys::ESC => KeyCode::Esc,
             keys::SPACE => KeyCode::Char(' '),
-            keys::LESS_THAN => KeyCode::Char('<'),
-            keys::GREATER_THAN => KeyCode::Char('>'),
-            keys::PLUS => KeyCode::Char('+'),
             keys::MINUS => KeyCode::Char('-'),
-            keys::SEMICOLON => KeyCode::Char(';'),
-            keys::PERCENT => KeyCode::Char('%'),
             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();
@@ -336,6 +316,14 @@ mod test {
                 modifiers: KeyModifiers::NONE
             }
         );
+
+        assert_eq!(
+            str::parse::<KeyEvent>("%").unwrap(),
+            KeyEvent {
+                code: KeyCode::Char('%'),
+                modifiers: KeyModifiers::NONE
+            }
+        )
     }
 
     #[test]
@@ -375,6 +363,16 @@ mod test {
         assert!(str::parse::<KeyEvent>("FU").is_err());
         assert!(str::parse::<KeyEvent>("123").is_err());
         assert!(str::parse::<KeyEvent>("S--").is_err());
+        assert!(str::parse::<KeyEvent>("S-percent").is_err());
+    }
+
+    #[test]
+    fn parsing_unsupported_named_keys() {
+        assert!(str::parse::<KeyEvent>("lt").is_err());
+        assert!(str::parse::<KeyEvent>("gt").is_err());
+        assert!(str::parse::<KeyEvent>("plus").is_err());
+        assert!(str::parse::<KeyEvent>("percent").is_err());
+        assert!(str::parse::<KeyEvent>("semicolon").is_err());
     }
 
     #[test]