#!/bin/sh
# Requires: rofi, xclip, xdotool, a color emoji font (Noto Color Emoji)
# Emoji and kaomoji picker: search by name, Enter copies the character to the
# clipboard and pastes it into whatever window was focused before rofi opened.
# Terminals don't bind plain ctrl+v to paste, so terminal window classes get
# ctrl+shift+v instead; override the whole thing with ROFI_EMOJI_PASTE_KEYS.
# Picks are remembered and float to the top, so the handful anyone actually
# uses stop needing to be searched for.
set -u

DATA=${ROFI_EMOJI_DATA:-$(dirname "$0")/../emoji.txt}
RECENT="${XDG_CACHE_HOME:-$HOME/.cache}/rofi-emoji-recent"
RECENT_MAX=${ROFI_EMOJI_RECENT_MAX:-30}

[ -f "$DATA" ] || { echo "rofi-emoji: no emoji data at $DATA" >&2; exit 1; }
touch "$RECENT"

# Two spaces between the character and its name: a kaomoji can contain single
# spaces, so a single space would be ambiguous when splitting the choice back
# apart. Names stay in the row because that is what the search filters on.
rows() {
    cat "$RECENT" "$DATA" | awk -F'\t' '!seen[$1]++ { printf "%s  %s\n", $1, $2 }'
}

TARGET_WIN=$(xdotool getactivewindow 2>/dev/null) || TARGET_WIN=

CHOICE=$(rows | rofi -dmenu -i -no-custom -p "emoji" -matching normal) || exit 0
[ -n "$CHOICE" ] || exit 0

CHAR=${CHOICE%%  *}
NAME=${CHOICE#*  }

printf '%s' "$CHAR" | xclip -selection clipboard -i

if [ -n "$TARGET_WIN" ]; then
    TARGET_CLASS=$(xdotool getwindowclassname "$TARGET_WIN" 2>/dev/null || echo)
    case "$TARGET_CLASS" in
        *[Tt]erm*|kitty|st|st-256color|foot|footclient|tilix|konsole)
            DEFAULT_PASTE_KEYS="ctrl+shift+v" ;;
        *)
            DEFAULT_PASTE_KEYS="ctrl+v" ;;
    esac
    PASTE_KEYS=${ROFI_EMOJI_PASTE_KEYS:-$DEFAULT_PASTE_KEYS}
    xdotool windowactivate --sync "$TARGET_WIN" 2>/dev/null
    xdotool key --clearmodifiers --window "$TARGET_WIN" "$PASTE_KEYS" 2>/dev/null
fi

# Rewrite the recents file with this pick first and its older copy dropped.
tmp="$RECENT.$$"
printf '%s\t%s\n' "$CHAR" "$NAME" > "$tmp"
grep -Fxv "$(printf '%s\t%s' "$CHAR" "$NAME")" "$RECENT" >> "$tmp" 2>/dev/null
head -n "$RECENT_MAX" "$tmp" > "$RECENT"
rm -f "$tmp"

command -v dunstify >/dev/null 2>&1 &&
    dunstify -r 7302 "Pasted $CHAR" "$NAME" ||
    notify-send "Pasted $CHAR" "$NAME"