Add disambiguated keycodes to default keymaps

With the enhanced keyboard protocol enabled, some additional key
combinations must be added to the defaults. Mostly this involves
combinations that couldn't be disambiguated without the enhanced
keyboard protocol like 'S-backspace'.

Some other key combinations change the way that the KeyEvent is
structured. For example, `A-_` becomes `A-S-minus`.

Co-authored-by: lesleyrs <19632758+lesleyrs@users.noreply.github.com>

book/src/keymap.md

@@ -350,7 +350,7 @@ experience.
 | `Alt-d`, `Alt-Delete`                       | Delete next word            | `delete_word_forward`    |
 | `Ctrl-u`                                    | Delete to start of line     | `kill_to_line_start`     |
 | `Ctrl-k`                                    | Delete to end of line       | `kill_to_line_end`       |
-| `Ctrl-h`, `Backspace`                       | Delete previous char        | `delete_char_backward`   |
+| `Ctrl-h`, `Backspace`, `Shift-Backspace`    | Delete previous char        | `delete_char_backward`   |
 | `Ctrl-d`, `Delete`                          | Delete next char            | `delete_char_forward`    |
 | `Ctrl-j`, `Enter`                           | Insert new line             | `insert_newline`         |
 
@@ -431,7 +431,7 @@ Keys to use within prompt, Remapping currently not supported.
 | `Alt-d`, `Alt-Delete`, `Ctrl-Delete`        | Delete next word                                                        |
 | `Ctrl-u`                                    | Delete to start of line                                                 |
 | `Ctrl-k`                                    | Delete to end of line                                                   |
-| `Backspace`, `Ctrl-h`                       | Delete previous char                                                    |
+| `Backspace`, `Ctrl-h`, `Shift-Backspace`    | Delete previous char                                                    |
 | `Delete`, `Ctrl-d`                          | Delete next char                                                        |
 | `Ctrl-s`                                    | Insert a word under doc cursor, may be changed to Ctrl-r Ctrl-w later   |
 | `Ctrl-p`, `Up`                              | Select previous history                                                 |

helix-term/src/keymap/default.rs

@@ -79,7 +79,7 @@ pub fn default() -> HashMap<Mode, Keymap> {
 
         "s" => select_regex,
         "A-s" => split_selection_on_newline,
-        "A-_" => merge_consecutive_selections,
+        "A-_" | "A-S-minus" => merge_consecutive_selections,
         "S" => split_selection,
         ";" => collapse_selection,
         "A-;" => flip_selections,
@@ -167,8 +167,8 @@ pub fn default() -> HashMap<Mode, Keymap> {
 
         "(" => rotate_selections_backward,
         ")" => rotate_selections_forward,
-        "A-(" => rotate_selection_contents_backward,
-        "A-)" => rotate_selection_contents_forward,
+        "A-(" | "A-S-9" => rotate_selection_contents_backward,
+        "A-)" | "A-S-0" => rotate_selection_contents_forward,
 
         "A-:" => ensure_selections_forward,
 
@@ -313,7 +313,7 @@ pub fn default() -> HashMap<Mode, Keymap> {
         "|" => shell_pipe,
         "A-|" => shell_pipe_to,
         "!" => shell_insert_output,
-        "A-!" => shell_append_output,
+        "A-!" | "A-S-1" => shell_append_output,
         "$" => shell_keep_pipe,
         "C-z" => suspend,
 
@@ -363,7 +363,7 @@ pub fn default() -> HashMap<Mode, Keymap> {
         "A-d" | "A-del" => delete_word_forward,
         "C-u" => kill_to_line_start,
         "C-k" => kill_to_line_end,
-        "C-h" | "backspace" => delete_char_backward,
+        "C-h" | "backspace" | "S-backspace" => delete_char_backward,
         "C-d" | "del" => delete_char_forward,
         "C-j" | "ret" => insert_newline,
         "tab" => insert_tab,

helix-term/src/ui/editor.rs

@@ -1447,11 +1447,11 @@ impl Component for EditorView {
 }
 
 fn canonicalize_key(key: &mut KeyEvent) {
-    if let KeyEvent {
-        code: KeyCode::Char(_),
-        modifiers: _,
-    } = key
-    {
-        key.modifiers.remove(KeyModifiers::SHIFT)
+    match key {
+        KeyEvent {
+            code: KeyCode::Char(char),
+            modifiers: _,
+        } if char.is_alphabetic() => key.modifiers.remove(KeyModifiers::SHIFT),
+        _ => (),
     }
 }

helix-term/src/ui/prompt.rs

@@ -513,7 +513,7 @@ impl Component for Prompt {
             alt!('d') | alt!(Delete) | ctrl!(Delete) => self.delete_word_forwards(cx.editor),
             ctrl!('k') => self.kill_to_end_of_line(cx.editor),
             ctrl!('u') => self.kill_to_start_of_line(cx.editor),
-            ctrl!('h') | key!(Backspace) => {
+            ctrl!('h') | key!(Backspace) | shift!(Backspace) => {
                 self.delete_char_backwards(cx.editor);
                 (self.callback_fn)(cx, &self.line, PromptEvent::Update);
             }