rootiest
93fc5e0517
Panel now selects from four width tiers based on $COLUMNS (with a 6-col buffer per side before stepping up): 52-wide (default), 70, 74, or 78. Each tier carries richer category descriptions sized to fit the layout. The box is horizontally centered on every draw via a left-padding prefix. Key reader switches from stty min 1 to min 0 / time 3, giving a 0.3 s poll interval so COLUMNS changes are detected without a keypress. The erase formula is now wrap-aware: prev_max_line_width / COLUMNS gives the wrap factor, ensuring old wider panels are fully cleared after narrowing. Idle timeout ticks that detect no resize are skipped entirely.
91 lines
3.1 KiB
Fish
91 lines
3.1 KiB
Fish
# Copyright (C) 2026 Rootiest
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# SPDX-License-Identifier: AGPL-3.0-or-later
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# SYNOPSIS
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# __config_toggle_read_key
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#
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# DESCRIPTION
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# Reads a single keypress directly from the controlling terminal in raw
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# mode and echoes a normalized token naming the key. Bypasses fish's
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# `read` builtin, whose interactive line editor swallows Tab and arrow
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# keys (and prints a `read> ` prompt) — none of which is usable for a TUI.
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#
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# The terminal is put into raw, no-echo mode with a 0.1s inter-byte timer
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# (`stty raw -echo min 1 time 1`) so a multi-byte escape sequence (e.g.
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# an arrow key, ESC [ A) is captured in one read while a lone key returns
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# promptly. Original terminal settings are always restored before return.
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#
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# In raw mode Ctrl-C does not raise SIGINT; it arrives as byte 3 (ETX),
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# which is reported as the token "quit".
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#
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# ARGUMENTS
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# (none)
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#
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# RETURNS
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# 0 A key was read; one of these tokens is printed to stdout:
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# up down left right arrow keys
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# space tab enter escape
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# quit Ctrl-C (byte 3) in raw mode
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# <char> any other single printable character
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# "" nothing decodable was read
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# 1 The terminal could not be put into raw mode (stdin is not a TTY)
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#
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# EXAMPLE
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# set -l key (__config_toggle_read_key)
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# or return # not a TTY — bail
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# switch $key
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# case up; echo "moved up"
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# case space; echo "toggled"
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# end
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function __config_toggle_read_key
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# Snapshot current terminal settings; failure means stdin is not a TTY.
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set -l saved (stty -g </dev/tty 2>/dev/null)
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or return 1
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# Raw, no-echo. min 0 / time 3: return after 0.3s even with no bytes (poll
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# interval for resize detection), or immediately when any bytes arrive.
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# Escape sequences (e.g. arrow keys) arrive fast enough to land in one read.
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stty raw -echo min 0 time 3 </dev/tty 2>/dev/null
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# One read() of up to 3 bytes — covers ESC [ A style sequences. od emits
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# the bytes as space-separated decimal codes.
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set -l codes (dd if=/dev/tty bs=3 count=1 2>/dev/null \
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| od -An -tu1 2>/dev/null | string trim | string split -n ' ')
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# Restore the terminal before doing anything else.
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stty $saved </dev/tty 2>/dev/null
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switch (string join ' ' $codes)
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case '27 91 65'
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echo up
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case '27 91 66'
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echo down
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case '27 91 67'
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echo right
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case '27 91 68'
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echo left
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case 27
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echo escape
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case 9
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echo tab
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case 32
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echo space
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case 10 13
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echo enter
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case 3
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echo quit
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case ''
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echo ''
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case '*'
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# Single printable byte → emit its character; ignore stray
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# multi-byte sequences we do not recognise. The two-step octal
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# form avoids fish mangling a one-shot '\\%03o' format string.
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if test (count $codes) -eq 1
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set -l oct (printf '%03o' $codes[1])
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printf '%b\n' "\\$oct"
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else
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echo ''
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end
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end
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end
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