clipbuffer

#!/usr/bin/env bash
#
# Simple X selection manager.
#
# Depends on: autocutsel -fork -selection PRIMARY -buttonup
# Idea from: http://chneukirchen.org/dotfiles/bin/backclip

function Clipbuffer::Daemon {
    declare -i i
    i=-1

    command -- mkdir -p -m 700 -- "$xsels"
    printf %d "$$" >"$xsels/$$$DISPLAY.pid"

    exec -- xprop -root -spy CUT_BUFFER0 |
        while read; do
            oi=$i
            command -- xorg-selection-primary-out >"$xsels/.$oi"
            command -- cmp -s -- "$xsels/.$oi" "$xsels/$oi" ||
                command -- mv -- "$xsels/.$oi" "$xsels/$((i = ++i % 32))"
        done
}

function Clipbuffer::Kill {
    shopt -s nullglob

    declare p

    for p in "$xsels/"?*"$DISPLAY.pid"; do
        p=${p##*/}
        command -- pkill -TERM -P "${p%$DISPLAY.pid}"
    done

    if $opt_clear; then
        command -- rm -fr -- "$xsels" 2>/dev/null
    else
        command -- rm -f -- "$xsels/"?*"$DISPLAY.pid" 2>/dev/null
    fi

    command -- xorg-selection-clear
}

function Clipbuffer::Clip {
    declare clip menu

    if command -- test-ctty; then
        menu=fzf
    else
        menu=dmenu2
    fi

    shopt -s nullglob
    shopt -s extglob

    printf -v clip %s "$(
        # printf '%s\n' "$xsels/"+([0-9]) |
        # sort -n |
        # xargs -I f sh -c "tr '[:space:]' ' ' < 'f'; echo" |
        # nl -w1 -s ' ' |
        # tac |

        for f in "$xsels/"+([0-9]); do
            printf '%d ' "${f##*/}"
            command -- tr '[:space:]' ' ' <"$f"
            printf '\n'
        done |
            exec -- sort -nr |
            exec -- menu "$menu"
    )"

    [[ -n $clip ]] &&
        if $opt_board; then
            # xsel -l /dev/null --clear --clipboard;
            command -- xorg-selection-clipboard-in <"$xsels/${clip%% *}"
        else
            # xsel -l /dev/null --clear --primary;
            command -- xorg-selection-primary-in <"$xsels/${clip%% *}"
        fi
}

declare -i \
    OPTIND=1 \
    OPTERR=1

declare \
    opt= \
    opt_board=false \
    opt_clear=false \
    opt_daemon=false \
    opt_kill=false \
    opt_restart=false \
    xsels=${TMPDIR:?}/clipbuffer

while getopts :bcdkr opt; do
    case $opt in
        b)
            opt_board=:
            ;;
        c)
            opt_clear=:
            ;;
        d)
            opt_daemon=:
            ;;
        k)
            opt_kill=:
            ;;
        r)
            opt_restart=:
            ;;
    esac
done

if $opt_daemon; then
    Clipbuffer::Daemon
elif $opt_kill; then
    Clipbuffer::Kill
elif $opt_restart; then
    [[ -n $DISPLAY ]] ||
        return 1
    Clipbuffer::Kill
    exec -- daemonize "${BASH_SOURCE[0]}" -d
else
    Clipbuffer::Clip
fi

# vim: set ft=zsh :