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feat: improve arrow key handling to fix stray AB chars; add left/right navigation; update analyze docs

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Tw93
2025-10-02 15:24:02 +08:00
parent 54eb671d38
commit a712969d65
2 changed files with 105 additions and 15 deletions
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40
lib/common.sh
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@@ -11,6 +11,7 @@ readonly BLUE="${ESC}[0;34m"
readonly YELLOW="${ESC}[1;33m"
readonly PURPLE="${ESC}[0;35m"
readonly RED="${ESC}[0;31m"
readonly GRAY="${ESC}[0;90m"
readonly NC="${ESC}[0m"
# Logging configuration
@@ -88,14 +89,12 @@ show_cursor() {
# Keyboard input handling (simple and robust)
read_key() {
local key rest
# Use macOS bash 3.2 compatible read syntax
local key
IFS= read -r -s -n 1 key || return 1
# Some terminals can yield empty on Enter with -n1; treat as ENTER
# Empty = ENTER (some terminals)
if [[ -z "$key" ]]; then
echo "ENTER"
return 0
echo "ENTER"; return 0
fi
case "$key" in
@@ -105,18 +104,29 @@ read_key() {
'a'|'A') echo "ALL" ;;
'n'|'N') echo "NONE" ;;
'?') echo "HELP" ;;
$'\x7f'|$'\b') echo "BACKSPACE" ;; # Support Backspace
$'\x1b')
# Read the next two bytes within 1s; works well on macOS bash 3.2
if IFS= read -r -s -n 2 -t 1 rest 2>/dev/null; then
case "$rest" in
"[A") echo "UP" ;;
"[B") echo "DOWN" ;;
"[C") echo "RIGHT" ;;
"[D") echo "LEFT" ;;
*) echo "OTHER" ;;
esac
# Non-blocking, byte-by-byte escape sequence parsing to avoid leaking 'A'/'B'
local next third
if IFS= read -r -s -n 1 -t 0.02 next 2>/dev/null; then
if [[ "$next" == "[" ]]; then
if IFS= read -r -s -n 1 -t 0.02 third 2>/dev/null; then
case "$third" in
'A') echo "UP" ;;
'B') echo "DOWN" ;;
'C') echo "RIGHT" ;;
'D') echo "LEFT" ;;
*) echo "OTHER" ;;
esac
else
echo "OTHER"
fi
else
# ESC followed by something else (e.g. ALT key combos)
echo "OTHER"
fi
else
# ESC pressed alone - treat as quit
# Bare ESC = quit
echo "QUIT"
fi
;;