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#!/usr/bin/env sh

windows=$(wmctrl -xl | tr -s '[:blank:]' | cut -d ' ' -f 3-3,5- | sed 's/^[a-zA-Z0-9-]*\.//')

# Add spaces to align the WM_NAMEs of the windows
max=$(printf %s\\n "$windows" | awk '{cur=length($1); max=(cur>max?cur:max)} END{print max}')

windows=$(printf %s\\n "$windows" | \
    awk -v max="$max" \
    '{cur=length($1); printf $1; \
    for(i=0; i < max - cur + 1; i++) printf " "; \
        $1 = ""; printf "%s\n", $0}')


target=$(printf %s\\n "$windows" | dmenu -l 10 -i -p switch: | tr -s '[:blank:]' | cut -d ' ' -f 2-)

[ -n "$target" ] && wmctrl -a "$target"