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src/ncurses_ui: Teach Kakoune about all the numeric keypad keys.

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Kakoune now knows about all the keypad keys listed in:

https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-PC-Style-Function-Keys
https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-VT220-Style-Function-Keys

The VT220-style encodings are used to for modified numeric keys when NumLock is
off. For example, consider the 8/Up key:

| Modifiers       | Sequence    | Notes             |
|-----------------|-------------|-------------------|
| Unmodified      | CSI A       | Ordinary up arrow |
| Shift           | SS3 2 x     | Shift-8           |
| NumLock         | 8           | Ordinary 8        |
| Shift + NumLock | CSI 1 ; 2 A | Shift-Up          |

Note that even though the terminal distinguishes between keypad and regular keys,
Kakoune maps keypad keys onto regular keys - keypad Enter is still <ret>, it
just supports more modifiers than the regular Enter key.
This commit is contained in:
Tim Allen 2021-03-26 15:43:42 +11:00
parent f7c1702965
commit 3aaf32f48f
1 changed files with 40 additions and 12 deletions
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52
src/ncurses_ui.cc
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@ -726,6 +726,7 @@ Optional<Key> NCursesUI::get_next_key()
case 'B': return masked_key(Key::Down);
case 'C': return masked_key(Key::Right);
case 'D': return masked_key(Key::Left);
case 'E': return masked_key('5'); // Numeric keypad 5
case 'F': return masked_key(Key::End); // PC/xterm style
case 'H': return masked_key(Key::Home); // PC/xterm style
case 'P': return masked_key(Key::F1);
@ -792,19 +793,46 @@ Optional<Key> NCursesUI::get_next_key()
return {};
};
auto parse_ss3 = []() -> Optional<Key> {
switch (get_char().value_or((unsigned char)0xff))
auto parse_ss3 = [&parse_mask]() -> Optional<Key> {
int raw_mask = 0;
char code = '0';
do {
raw_mask = raw_mask * 10 + (code - '0');
code = get_char().value_or((unsigned char)0xff);
} while (code >= '0' and code <= '9');
switch (code)
{
case 'A': return Key{Key::Up};
case 'B': return Key{Key::Down};
case 'C': return Key{Key::Right};
case 'D': return Key{Key::Left};
case 'F': return Key{Key::End};
case 'H': return Key{Key::Home};
case 'P': return Key{Key::F1};
case 'Q': return Key{Key::F2};
case 'R': return Key{Key::F3};
case 'S': return Key{Key::F4};
case ' ': return Key{parse_mask(raw_mask), ' '};
case 'A': return Key{parse_mask(raw_mask), Key::Up};
case 'B': return Key{parse_mask(raw_mask), Key::Down};
case 'C': return Key{parse_mask(raw_mask), Key::Right};
case 'D': return Key{parse_mask(raw_mask), Key::Left};
case 'F': return Key{parse_mask(raw_mask), Key::End};
case 'H': return Key{parse_mask(raw_mask), Key::Home};
case 'I': return Key{parse_mask(raw_mask), Key::Tab};
case 'M': return Key{parse_mask(raw_mask), Key::Return};
case 'P': return Key{parse_mask(raw_mask), Key::F1};
case 'Q': return Key{parse_mask(raw_mask), Key::F2};
case 'R': return Key{parse_mask(raw_mask), Key::F3};
case 'S': return Key{parse_mask(raw_mask), Key::F4};
case 'X': return Key{parse_mask(raw_mask), '='};
case 'j': return Key{parse_mask(raw_mask), '*'};
case 'k': return Key{parse_mask(raw_mask), '+'};
case 'l': return Key{parse_mask(raw_mask), ','};
case 'm': return Key{parse_mask(raw_mask), '-'};
case 'n': return Key{parse_mask(raw_mask), '.'};
case 'o': return Key{parse_mask(raw_mask), '/'};
case 'p': return Key{parse_mask(raw_mask), '0'};
case 'q': return Key{parse_mask(raw_mask), '1'};
case 'r': return Key{parse_mask(raw_mask), '2'};
case 's': return Key{parse_mask(raw_mask), '3'};
case 't': return Key{parse_mask(raw_mask), '4'};
case 'u': return Key{parse_mask(raw_mask), '5'};
case 'v': return Key{parse_mask(raw_mask), '6'};
case 'w': return Key{parse_mask(raw_mask), '7'};
case 'x': return Key{parse_mask(raw_mask), '8'};
case 'y': return Key{parse_mask(raw_mask), '9'};
default: return {};
}
};