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input: add new Unicode input mode

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This mode is activated through the new key-bindings.unicode-input and
search-bindings.unicode-input key bindings.

When active, the user can “build” a Unicode codepoint by typing its
hexadecimal value.

Note that there’s no visual feedback in this mode. This is
intentional. This mode is intended to be a fallback for users that
don’t use an IME.

Closes #1116
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Daniel Eklöf 2022-07-28 18:09:16 +02:00
parent fa2d9f8699
commit 8967dd9cfe
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11 changed files with 167 additions and 2 deletions
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30
doc/foot.ini.5.scd
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@ -791,6 +791,32 @@ e.g. *search-start=none*.
Jump the next prompt (requires shell integration, see
*foot*(1)). Default: _Control+Shift+x_.
*unicode-input*
Input a Unicode character by typing its codepoint in hexadecimal,
followed by *Enter* or *Space*.
For example, to input the character _ö_ (LATIN SMALL LETTER O WITH
DIAERESIS, Unicode codepoint 0xf6), you would first activate this
key binding, then type: *f*, *6*, *Enter*.
Another example: to input 😍 (SMILING FACE WITH HEART-SHAPED EYES,
Unicode codepoint 0x1f60d), activate this key binding, then type:
*1*, *f*, *6*, *0*, *d*, *Enter*.
Recognized key bindings in Unicode input mode:
- Enter, Space: commit the Unicode character, then exit this mode.
- Escape, Ctrl+c, Ctrl+d, Ctrl+g: abort input, then exit this mode.
- 0-9, a-f: append next digit to the Unicode's codepoint.
- Backspace: undo the last digit.
Note that there is no visual feedback while in this mode. This is
by design; foot's Unicode input mode is considered to be a
fallback. The preferred way of entering Unicode characters, emojis
etc is by using an IME.
Default: _none_.
# SECTION: search-bindings
This section lets you override the default key bindings used in
@ -869,6 +895,10 @@ scrollback search mode. The syntax is exactly the same as the regular
Paste from the _primary selection_ into the search
buffer. Default: _Shift+Insert_.
*unicode-input*
Unicode input mode. See _key-bindings.unicode-input_ for
details. Default: _none_.
# SECTION: url-bindings
This section lets you override the default key bindings used in URL