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keymap: align backspace escapes with XTerm

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Backspace now emits DEL for all non-ctrl modifier combos, and BS for
all ctrl modifier combos.

The alt modifier prefixes DEL/BS with ESC.

This also removes my own hack of mapping ctrl+backspace to
alt+backspace.

Describe backspace behavior in both the README and the man page.

TODO: implement DECBKM to allow applications to toggle the backspace
behavior.
This commit is contained in:
Daniel Eklöf 2020-02-21 19:11:03 +01:00
parent 54fbfb6405
commit ae23023341
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GPG key ID: 5BBD4992C116573F
3 changed files with 44 additions and 3 deletions
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19
keymap.h
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@ -38,9 +38,22 @@ static const struct key_data key_backtab[] = {
};
static const struct key_data key_backspace[] = {
{MOD_ALT, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\033\x7f"},
{MOD_CTRL, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\033\x7f"},
{MOD_ANY, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\x7f"},
{MOD_SHIFT, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\x7f"},
{MOD_ALT, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\033\x7f"},
{MOD_SHIFT | MOD_ALT, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\033\x7f"},
{MOD_CTRL, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\x08"},
{MOD_SHIFT | MOD_CTRL, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\x08"},
{MOD_ALT | MOD_CTRL, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\033\x08"},
{MOD_SHIFT | MOD_ALT | MOD_CTRL, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\033\x08"},
{MOD_META, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\x7f"},
{MOD_META | MOD_SHIFT, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\x7f"},
{MOD_META | MOD_ALT, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\033\x7f"},
{MOD_META | MOD_SHIFT | MOD_ALT, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\033\x7f"},
{MOD_META | MOD_CTRL, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\x08"},
{MOD_META | MOD_SHIFT | MOD_CTRL, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\x08"},
{MOD_META | MOD_ALT | MOD_CTRL, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\033\x08"},
{MOD_META | MOD_SHIFT | MOD_ALT | MOD_CTRL, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\033\x08"},
{MOD_ANY, CURSOR_KEYS_DONTCARE, KEYPAD_DONTCARE, "\x7f"},
};
#define DEFAULT_MODS_FOR_SINGLE(sym) \