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|
#!/usr/bin/env bash
set -o noclobber -o noglob -o nounset -o pipefail
IFS=$'\n'
# If the option `use_preview_script` is set to `true`,
# then this script will be called and its output will be displayed in ranger.
# ANSI color codes are supported.
# STDIN is disabled, so interactive scripts won't work properly
# This script is considered a configuration file and must be updated manually.
# It will be left untouched if you upgrade ranger.
# Meanings of exit codes:
# code | meaning | action of ranger
# -----+------------+-------------------------------------------
# 0 | success | Display stdout as preview
# 1 | no preview | Display no preview at all
# 2 | plain text | Display the plain content of the file
# 3 | fix width | Don't reload when width changes
# 4 | fix height | Don't reload when height changes
# 5 | fix both | Don't ever reload
# 6 | image | Display the image `$IMAGE_CACHE_PATH` points to as an image preview
# 7 | image | Display the file directly as an image
# Script arguments
FILE_PATH="${1}" # Full path of the highlighted file
PV_WIDTH="${2}" # Width of the preview pane (number of fitting characters)
PV_HEIGHT="${3}" # Height of the preview pane (number of fitting characters)
IMAGE_CACHE_PATH="${4}" # Full path that should be used to cache image preview
PV_IMAGE_ENABLED="${5}" # 'True' if image previews are enabled, 'False' otherwise.
FILE_EXTENSION="${FILE_PATH##*.}"
FILE_EXTENSION_LOWER=$(echo ${FILE_EXTENSION} | tr '[:upper:]' '[:lower:]')
# Settings
HIGHLIGHT_SIZE_MAX=262143 # 256KiB
HIGHLIGHT_TABWIDTH=8
HIGHLIGHT_STYLE='pablo'
PYGMENTIZE_STYLE='autumn'
handle_extension() {
case "${FILE_EXTENSION_LOWER}" in
# Archive
a|ace|alz|arc|arj|bz|bz2|cab|cpio|deb|gz|jar|lha|lz|lzh|lzma|lzo|\
rpm|rz|t7z|tar|tbz|tbz2|tgz|tlz|txz|tZ|tzo|war|xpi|xz|Z|zip)
atool --list -- "${FILE_PATH}" && exit 5
bsdtar --list --file "${FILE_PATH}" && exit 5
exit 1;;
rar)
# Avoid password prompt by providing empty password
unrar lt -p- -- "${FILE_PATH}" && exit 5
exit 1;;
7z)
# Avoid password prompt by providing empty password
7z l -p -- "${FILE_PATH}" && exit 5
exit 1;;
# PDF
pdf)
# Preview as text conversion
pdftotext -l 10 -nopgbrk -q -- "${FILE_PATH}" - | fmt -w ${PV_WIDTH} && exit 5
mutool draw -F txt -i -- "${FILE_PATH}" 1-10 | fmt -w ${PV_WIDTH} && exit 5
exiftool "${FILE_PATH}" && exit 5
exit 1;;
# BitTorrent
torrent)
transmission-show -- "${FILE_PATH}" && exit 5
exit 1;;
# OpenDocument
odt|ods|odp|sxw)
# Preview as text conversion
odt2txt "${FILE_PATH}" && exit 5
exit 1;;
# HTML
htm|html|xhtml)
# Preview as text conversion
w3m -dump "${FILE_PATH}" && exit 5
lynx -dump -- "${FILE_PATH}" && exit 5
elinks -dump "${FILE_PATH}" && exit 5
;; # Continue with next handler on failure
esac
}
handle_image() {
local mimetype="${1}"
case "${mimetype}" in
# SVG
# image/svg+xml)
# convert "${FILE_PATH}" "${IMAGE_CACHE_PATH}" && exit 6
# exit 1;;
# DJVU
image/vnd.djvu)
# Skip processing as it's very intensive
exit 1;;
# Image
image/*)
local orientation
orientation="$( identify -format '%[EXIF:Orientation]\n' -- "${FILE_PATH}" )"
# If orientation data is present and the image actually
# needs rotating ("1" means no rotation)...
if [[ -n "$orientation" && "$orientation" != 1 ]]; then
# ...auto-rotate the image according to the EXIF data.
convert -- "${FILE_PATH}" -auto-orient "${IMAGE_CACHE_PATH}" && exit 6
fi
# `w3mimgdisplay` will be called for all images (unless overriden as above),
# but might fail for unsupported types.
exit 7;;
# Video
# video/*)
# # Thumbnail
# ffmpegthumbnailer -i "${FILE_PATH}" -o "${IMAGE_CACHE_PATH}" -s 0 && exit 6
# exit 1;;
# PDF
# application/pdf)
# pdftoppm -f 1 -l 1 \
# -scale-to-x 1920 \
# -scale-to-y -1 \
# -singlefile \
# -jpeg -tiffcompression jpeg \
# -- "${FILE_PATH}" "${IMAGE_CACHE_PATH%.*}" \
# && exit 6 || exit 1;;
# Preview archives using the first image inside.
# (Very useful for comic book collections for example.)
# application/zip|application/x-rar|application/x-7z-compressed|\
# application/x-xz|application/x-bzip2|application/x-gzip|application/x-tar)
# local fn=""; local fe=""
# local zip=""; local rar=""; local tar=""; local bsd=""
# case "${mimetype}" in
# application/zip) zip=1 ;;
# application/x-rar) rar=1 ;;
# application/x-7z-compressed) ;;
# *) tar=1 ;;
# esac
# { [ "$tar" ] && fn=$(tar --list --file "${FILE_PATH}"); } || \
# { fn=$(bsdtar --list --file "${FILE_PATH}") && bsd=1 && tar=""; } || \
# { [ "$rar" ] && fn=$(unrar lb -p- -- "${FILE_PATH}"); } || \
# { [ "$zip" ] && fn=$(zipinfo -1 -- "${FILE_PATH}"); } || return
#
# fn=$(echo "$fn" | python -c "import sys; import mimetypes as m; \
# [ print(l, end='') for l in sys.stdin if \
# (m.guess_type(l[:-1])[0] or '').startswith('image/') ]" |\
# sort -V | head -n 1)
# [ "$fn" = "" ] && return
# [ "$bsd" ] && fn=$(printf '%b' "$fn")
#
# [ "$tar" ] && tar --extract --to-stdout \
# --file "${FILE_PATH}" -- "$fn" > "${IMAGE_CACHE_PATH}" && exit 6
# fe=$(echo -n "$fn" | sed 's/[][*?\]/\\\0/g')
# [ "$bsd" ] && bsdtar --extract --to-stdout \
# --file "${FILE_PATH}" -- "$fe" > "${IMAGE_CACHE_PATH}" && exit 6
# [ "$bsd" ] || [ "$tar" ] && rm -- "${IMAGE_CACHE_PATH}"
# [ "$rar" ] && unrar p -p- -inul -- "${FILE_PATH}" "$fn" > \
# "${IMAGE_CACHE_PATH}" && exit 6
# [ "$zip" ] && unzip -pP "" -- "${FILE_PATH}" "$fe" > \
# "${IMAGE_CACHE_PATH}" && exit 6
# [ "$rar" ] || [ "$zip" ] && rm -- "${IMAGE_CACHE_PATH}"
# ;;
esac
}
handle_mime() {
local mimetype="${1}"
case "${mimetype}" in
# Text
text/* | */xml)
# Syntax highlight
if [[ "$( stat --printf='%s' -- "${FILE_PATH}" )" -gt "${HIGHLIGHT_SIZE_MAX}" ]]; then
exit 2
fi
if [[ "$( tput colors )" -ge 256 ]]; then
local pygmentize_format='terminal256'
local highlight_format='xterm256'
else
local pygmentize_format='terminal'
local highlight_format='ansi'
fi
highlight --replace-tabs="${HIGHLIGHT_TABWIDTH}" --out-format="${highlight_format}" \
--style="${HIGHLIGHT_STYLE}" --force -- "${FILE_PATH}" && exit 5
# pygmentize -f "${pygmentize_format}" -O "style=${PYGMENTIZE_STYLE}" -- "${FILE_PATH}" && exit 5
exit 2;;
# Image
image/*)
# Preview as text conversion
# img2txt --gamma=0.6 --width="${PV_WIDTH}" -- "${FILE_PATH}" && exit 4
exiftool "${FILE_PATH}" && exit 5
exit 1;;
# Video and audio
video/* | audio/*)
mediainfo "${FILE_PATH}" && exit 5
exiftool "${FILE_PATH}" && exit 5
exit 1;;
esac
}
handle_fallback() {
echo '----- File Type Classification -----' && file --dereference --brief -- "${FILE_PATH}" && exit 5
exit 1
}
MIMETYPE="$( file --dereference --brief --mime-type -- "${FILE_PATH}" )"
if [[ "${PV_IMAGE_ENABLED}" == 'True' ]]; then
handle_image "${MIMETYPE}"
fi
handle_extension
handle_mime "${MIMETYPE}"
handle_fallback
exit 1
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