Revert terminal: Add Alt key bindings for terminal (#15535)

- reverts commit 66ada3e44c.
- change default `option_as_meta` to true

assets/settings/default.json

@@ -635,7 +635,7 @@
     //         "option_to_meta": false,
     //  2. Make the option keys behave as a 'meta' key, e.g. for emacs
     //         "option_to_meta": true,
-    "option_as_meta": false,
+    "option_as_meta": true,
     // Whether or not selecting text in the terminal will automatically
     // copy to the system clipboard.
     "copy_on_select": false,

crates/terminal/src/mappings/keys.rs

@@ -192,103 +192,6 @@ pub fn to_esc_str(keystroke: &Keystroke, mode: &TermMode, alt_is_meta: bool) ->
         ("^", AlacModifiers::Ctrl) => Some("\x1e".to_string()), //30
         ("_", AlacModifiers::Ctrl) => Some("\x1f".to_string()), //31
         ("?", AlacModifiers::Ctrl) => Some("\x7f".to_string()), //127
-        // Mapping of Alt+key; emacs meta key: M-
-        ("a", AlacModifiers::Alt) => Some("\x1ba".to_string()),
-        ("A", AlacModifiers::Alt) => Some("\x1bA".to_string()),
-        ("b", AlacModifiers::Alt) => Some("\x1bb".to_string()),
-        ("B", AlacModifiers::Alt) => Some("\x1bB".to_string()),
-        ("c", AlacModifiers::Alt) => Some("\x1bc".to_string()),
-        ("C", AlacModifiers::Alt) => Some("\x1bC".to_string()),
-        ("d", AlacModifiers::Alt) => Some("\x1bd".to_string()),
-        ("D", AlacModifiers::Alt) => Some("\x1bD".to_string()),
-        ("e", AlacModifiers::Alt) => Some("\x1be".to_string()),
-        ("E", AlacModifiers::Alt) => Some("\x1bE".to_string()),
-        ("f", AlacModifiers::Alt) => Some("\x1bf".to_string()),
-        ("F", AlacModifiers::Alt) => Some("\x1bF".to_string()),
-        ("g", AlacModifiers::Alt) => Some("\x1bg".to_string()),
-        ("G", AlacModifiers::Alt) => Some("\x1bG".to_string()),
-        ("h", AlacModifiers::Alt) => Some("\x1bh".to_string()),
-        ("H", AlacModifiers::Alt) => Some("\x1bH".to_string()),
-        ("i", AlacModifiers::Alt) => Some("\x1bi".to_string()),
-        ("I", AlacModifiers::Alt) => Some("\x1bI".to_string()),
-        ("j", AlacModifiers::Alt) => Some("\x1bj".to_string()),
-        ("J", AlacModifiers::Alt) => Some("\x1bJ".to_string()),
-        ("k", AlacModifiers::Alt) => Some("\x1bk".to_string()),
-        ("K", AlacModifiers::Alt) => Some("\x1bK".to_string()),
-        ("l", AlacModifiers::Alt) => Some("\x1bl".to_string()),
-        ("L", AlacModifiers::Alt) => Some("\x1bL".to_string()),
-        ("m", AlacModifiers::Alt) => Some("\x1bm".to_string()),
-        ("M", AlacModifiers::Alt) => Some("\x1bM".to_string()),
-        ("n", AlacModifiers::Alt) => Some("\x1bn".to_string()),
-        ("N", AlacModifiers::Alt) => Some("\x1bN".to_string()),
-        ("o", AlacModifiers::Alt) => Some("\x1bo".to_string()),
-        ("O", AlacModifiers::Alt) => Some("\x1bO".to_string()),
-        ("p", AlacModifiers::Alt) => Some("\x1bp".to_string()),
-        ("P", AlacModifiers::Alt) => Some("\x1bP".to_string()),
-        ("q", AlacModifiers::Alt) => Some("\x1bq".to_string()),
-        ("Q", AlacModifiers::Alt) => Some("\x1bQ".to_string()),
-        ("r", AlacModifiers::Alt) => Some("\x1br".to_string()),
-        ("R", AlacModifiers::Alt) => Some("\x1bR".to_string()),
-        ("s", AlacModifiers::Alt) => Some("\x1bs".to_string()),
-        ("S", AlacModifiers::Alt) => Some("\x1bS".to_string()),
-        ("t", AlacModifiers::Alt) => Some("\x1bt".to_string()),
-        ("T", AlacModifiers::Alt) => Some("\x1bT".to_string()),
-        ("u", AlacModifiers::Alt) => Some("\x1bu".to_string()),
-        ("U", AlacModifiers::Alt) => Some("\x1bU".to_string()),
-        ("v", AlacModifiers::Alt) => Some("\x1bv".to_string()),
-        ("V", AlacModifiers::Alt) => Some("\x1bV".to_string()),
-        ("w", AlacModifiers::Alt) => Some("\x1bw".to_string()),
-        ("W", AlacModifiers::Alt) => Some("\x1bW".to_string()),
-        ("x", AlacModifiers::Alt) => Some("\x1bx".to_string()),
-        ("X", AlacModifiers::Alt) => Some("\x1bX".to_string()),
-        ("y", AlacModifiers::Alt) => Some("\x1by".to_string()),
-        ("Y", AlacModifiers::Alt) => Some("\x1bY".to_string()),
-        ("z", AlacModifiers::Alt) => Some("\x1bz".to_string()),
-        ("Z", AlacModifiers::Alt) => Some("\x1bZ".to_string()),
-        // Emacs Numeric arguments / prefix arguments
-        ("0", AlacModifiers::Alt) => Some("\x1b0".to_string()),
-        ("1", AlacModifiers::Alt) => Some("\x1b1".to_string()),
-        ("2", AlacModifiers::Alt) => Some("\x1b2".to_string()),
-        ("3", AlacModifiers::Alt) => Some("\x1b3".to_string()),
-        ("4", AlacModifiers::Alt) => Some("\x1b4".to_string()),
-        ("5", AlacModifiers::Alt) => Some("\x1b5".to_string()),
-        ("6", AlacModifiers::Alt) => Some("\x1b6".to_string()),
-        ("7", AlacModifiers::Alt) => Some("\x1b7".to_string()),
-        ("8", AlacModifiers::Alt) => Some("\x1b8".to_string()),
-        ("9", AlacModifiers::Alt) => Some("\x1b9".to_string()),
-        // Various Emacs Meta key combinations
-        ("!", AlacModifiers::Alt) => Some("\x1b!".to_string()),
-        // ("\"", AlacModifiers::Alt) => Some("\x1b\"".to_string()),
-        // ("#", AlacModifiers::Alt) => Some("\x1b#".to_string()),
-        ("$", AlacModifiers::Alt) => Some("\x1b$".to_string()),
-        ("%", AlacModifiers::Alt) => Some("\x1b%".to_string()),
-        ("&", AlacModifiers::Alt) => Some("\x1b&".to_string()),
-        ("'", AlacModifiers::Alt) => Some("\x1b'".to_string()),
-        ("(", AlacModifiers::Alt) => Some("\x1b(".to_string()),
-        (")", AlacModifiers::Alt) => Some("\x1b)".to_string()),
-        // ("*", AlacModifiers::Alt) => Some("\x1b*".to_string()),
-        // ("+", AlacModifiers::Alt) => Some("\x1b+".to_string()),
-        (",", AlacModifiers::Alt) => Some("\x1b,".to_string()),
-        ("-", AlacModifiers::Alt) => Some("\x1b-".to_string()),
-        (".", AlacModifiers::Alt) => Some("\x1b.".to_string()),
-        ("/", AlacModifiers::Alt) => Some("\x1b/".to_string()),
-        (":", AlacModifiers::Alt) => Some("\x1b:".to_string()),
-        (";", AlacModifiers::Alt) => Some("\x1b;".to_string()),
-        ("<", AlacModifiers::Alt) => Some("\x1b<".to_string()),
-        ("=", AlacModifiers::Alt) => Some("\x1b=".to_string()),
-        (">", AlacModifiers::Alt) => Some("\x1b>".to_string()),
-        ("?", AlacModifiers::Alt) => Some("\x1b?".to_string()),
-        ("@", AlacModifiers::Alt) => Some("\x1b@".to_string()),
-        // ("[", AlacModifiers::Alt) => Some("\x1b[".to_string()),
-        ("\\", AlacModifiers::Alt) => Some("\x1b\\".to_string()),
-        // ("]", AlacModifiers::Alt) => Some("\x1b]".to_string()),
-        ("^", AlacModifiers::Alt) => Some("\x1b^".to_string()),
-        // ("_", AlacModifiers::Alt) => Some("\x1b_".to_string()),
-        ("`", AlacModifiers::Alt) => Some("\x1b`".to_string()),
-        ("{", AlacModifiers::Alt) => Some("\x1b{".to_string()),
-        ("|", AlacModifiers::Alt) => Some("\x1b|".to_string()),
-        ("}", AlacModifiers::Alt) => Some("\x1b}".to_string()),
-        ("~", AlacModifiers::Alt) => Some("\x1b~".to_string()),
         _ => None,
     };
     if manual_esc_str.is_some() {

crates/terminal/src/terminal_settings.rs

@@ -141,7 +141,7 @@ pub struct TerminalSettingsContent {
     pub alternate_scroll: Option<AlternateScroll>,
     /// Sets whether the option key behaves as the meta key.
     ///
-    /// Default: false
+    /// Default: true
     pub option_as_meta: Option<bool>,
     /// Whether or not selecting text in the terminal will automatically
     /// copy to the system clipboard.

docs/src/configuring-zed.md

@@ -1252,7 +1252,7 @@ List of `integer` column numbers
   "font_family": null,
   "font_features": null,
   "font_size": null,
-  "option_as_meta": false,
+  "option_as_meta": true,
   "button": false,
   "shell": {},
   "toolbar": {