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utility_scripts/file_previewer.sh

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#!/bin/sh
# File preview handler for lf using the Perl `mimetype` utility.
preview_filepath="/tmp/lf_preview_image.png"
case "$(mimetype --brief -- "$1")" in
application/gzip | application/msword | application/x-iso9660-image | application/vnd.openxmlformats-officedocument.wordprocessingml.document | application/vnd.openxmlformats-officedocument.presentationml.presentation | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet)
exiftool "$1" | bat --theme='base16' --terminal-width "$(($2-4))" --force-colorization;;
application/json)
jq --color-output . "$1" | bat --theme='base16' --terminal-width "$(($2-4))" --force-colorization;;
application/pdf)
pdftoppm -jpeg "$1" -singlefile | chafa --size="$(($2-4))"x"$3" --animate off
pdfinfo "$1" | bat --theme='base16' --terminal-width "$(($2-4))" --force-colorization;;
application/vnd.sqlite3)
sqlite3 "$1" "SELECT * FROM sqlite_master WHERE type = 'table';" | bat --theme='base16' --terminal-width "$(($2-4))" --force-colorization;;
application/x-pcapng)
tshark -r "$1" | bat --theme='base16' --terminal-width "$(($2-4))" --force-colorization;; # the --read-file option does not seem to work
application/zip)
unzip -lv "$1" | bat --theme='base16' --terminal-width "$(($2-4))" --force-colorization;;
audio/*)
exiftool -Picture -b "$1" | chafa --size="$(($2-4))"x"$3" --animate off || chafa cover.* --size="$(($2-4))"x"$3" --animate off
exiftool "$1" | bat --theme='base16' --terminal-width "$(($2-4))" --force-colorization;;
video/*)
ffmpeg -ss 00:00:00 -i "$1" -frames:v 1 "$preview_filepath"
chafa "$preview_filepath" --size="$(($2-4))"x"$3"
rm "$preview_filepath" # removing preview file so that lf looks for a new preview image instead of going for an old one
exiftool "$1" | bat --theme='base16' --terminal-width "$(($2-4))" --force-colorization;;
image/*)
chafa "$1" --size="$(($2-4))"x"$3" --animate off
exiftool "$1" | bat --theme='base16' --terminal-width "$(($2-4))" --force-colorization;;
*)
bat --theme='base16' --terminal-width "$(($2-4))" --force-colorization "$1"
esac