388 lines
15 KiB
Bash
Executable file
388 lines
15 KiB
Bash
Executable file
#!/usr/bin/env bash
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set -o noclobber -o noglob -o nounset -o pipefail
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IFS=$'\n'
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## If the option `use_preview_script` is set to `true`,
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## then this script will be called and its output will be displayed in ranger.
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## ANSI color codes are supported.
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## STDIN is disabled, so interactive scripts won't work properly
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## This script is considered a configuration file and must be updated manually.
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## It will be left untouched if you upgrade ranger.
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## Because of some automated testing we do on the script #'s for comments need
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## to be doubled up. Code that is commented out, because it's an alternative for
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## example, gets only one #.
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## Meanings of exit codes:
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## code | meaning | action of ranger
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## -----+------------+-------------------------------------------
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## 0 | success | Display stdout as preview
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## 1 | no preview | Display no preview at all
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## 2 | plain text | Display the plain content of the file
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## 3 | fix width | Don't reload when width changes
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## 4 | fix height | Don't reload when height changes
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## 5 | fix both | Don't ever reload
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## 6 | image | Display the image `$IMAGE_CACHE_PATH` points to as an image preview
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## 7 | image | Display the file directly as an image
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## Script arguments
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FILE_PATH="${1}" # Full path of the highlighted file
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PV_WIDTH="${2}" # Width of the preview pane (number of fitting characters)
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## shellcheck disable=SC2034 # PV_HEIGHT is provided for convenience and unused
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PV_HEIGHT="${3}" # Height of the preview pane (number of fitting characters)
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IMAGE_CACHE_PATH="${4}" # Full path that should be used to cache image preview
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PV_IMAGE_ENABLED="${5}" # 'True' if image previews are enabled, 'False' otherwise.
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FILE_EXTENSION="${FILE_PATH##*.}"
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FILE_EXTENSION_LOWER="$(printf "%s" "${FILE_EXTENSION}" | tr '[:upper:]' '[:lower:]')"
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## Settings
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HIGHLIGHT_SIZE_MAX=262143 # 256KiB
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HIGHLIGHT_TABWIDTH="${HIGHLIGHT_TABWIDTH:-8}"
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HIGHLIGHT_STYLE="${HIGHLIGHT_STYLE:-pablo}"
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HIGHLIGHT_OPTIONS="--replace-tabs=${HIGHLIGHT_TABWIDTH} --style=${HIGHLIGHT_STYLE} ${HIGHLIGHT_OPTIONS:-}"
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PYGMENTIZE_STYLE="${PYGMENTIZE_STYLE:-autumn}"
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OPENSCAD_IMGSIZE="${RNGR_OPENSCAD_IMGSIZE:-1000,1000}"
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OPENSCAD_COLORSCHEME="${RNGR_OPENSCAD_COLORSCHEME:-Tomorrow Night}"
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handle_extension() {
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case "${FILE_EXTENSION_LOWER}" in
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## Archive
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a|ace|alz|arc|arj|bz|bz2|cab|cpio|deb|gz|jar|lha|lz|lzh|lzma|lzo|\
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rpm|rz|t7z|tar|tbz|tbz2|tgz|tlz|txz|tZ|tzo|war|xpi|xz|Z|zip)
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atool --list -- "${FILE_PATH}" && exit 5
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bsdtar --list --file "${FILE_PATH}" && exit 5
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exit 1;;
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rar)
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## Avoid password prompt by providing empty password
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unrar lt -p- -- "${FILE_PATH}" && exit 5
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exit 1;;
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7z)
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## Avoid password prompt by providing empty password
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7z l -p -- "${FILE_PATH}" && exit 5
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exit 1;;
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## PDF
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pdf)
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## Preview as text conversion
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pdftotext -l 10 -nopgbrk -q -- "${FILE_PATH}" - | \
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fmt -w "${PV_WIDTH}" && exit 5
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mutool draw -F txt -i -- "${FILE_PATH}" 1-10 | \
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fmt -w "${PV_WIDTH}" && exit 5
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exiftool "${FILE_PATH}" && exit 5
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exit 1;;
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## BitTorrent
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torrent)
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transmission-show -- "${FILE_PATH}" && exit 5
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exit 1;;
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## OpenDocument
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odt|sxw)
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## Preview as text conversion
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odt2txt "${FILE_PATH}" && exit 5
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## Preview as markdown conversion
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pandoc -s -t markdown -- "${FILE_PATH}" && exit 5
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exit 1;;
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ods|odp)
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## Preview as text conversion (unsupported by pandoc for markdown)
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odt2txt "${FILE_PATH}" && exit 5
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exit 1;;
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## XLSX
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xlsx)
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## Preview as csv conversion
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## Uses: https://github.com/dilshod/xlsx2csv
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xlsx2csv -- "${FILE_PATH}" && exit 5
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exit 1;;
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## HTML
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htm|html|xhtml)
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## Preview as text conversion
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w3m -dump "${FILE_PATH}" && exit 5
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lynx -dump -- "${FILE_PATH}" && exit 5
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elinks -dump "${FILE_PATH}" && exit 5
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pandoc -s -t markdown -- "${FILE_PATH}" && exit 5
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;;
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## JSON
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json)
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jq --color-output . "${FILE_PATH}" && exit 5
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python -m json.tool -- "${FILE_PATH}" && exit 5
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;;
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## Jupyter Notebooks
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ipynb)
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jupyter nbconvert --to markdown "${FILE_PATH}" --stdout | env COLORTERM=8bit bat --color=always --style=plain --language=markdown && exit 5
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jupyter nbconvert --to markdown "${FILE_PATH}" --stdout && exit 5
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jq --color-output . "${FILE_PATH}" && exit 5
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python -m json.tool -- "${FILE_PATH}" && exit 5
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;;
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## Direct Stream Digital/Transfer (DSDIFF) and wavpack aren't detected
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## by file(1).
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dff|dsf|wv|wvc)
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mediainfo "${FILE_PATH}" && exit 5
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exiftool "${FILE_PATH}" && exit 5
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;; # Continue with next handler on failure
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esac
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}
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handle_image() {
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## Size of the preview if there are multiple options or it has to be
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## rendered from vector graphics. If the conversion program allows
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## specifying only one dimension while keeping the aspect ratio, the width
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## will be used.
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local DEFAULT_SIZE="1920x1080"
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local mimetype="${1}"
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case "${mimetype}" in
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## SVG
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image/svg+xml|image/svg)
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rsvg-convert --keep-aspect-ratio --width "${DEFAULT_SIZE%x*}" "${FILE_PATH}" -o "${IMAGE_CACHE_PATH}.png" \
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&& mv "${IMAGE_CACHE_PATH}.png" "${IMAGE_CACHE_PATH}" \
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&& exit 6
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exit 1;;
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## DjVu
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# image/vnd.djvu)
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# ddjvu -format=tiff -quality=90 -page=1 -size="${DEFAULT_SIZE}" \
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# - "${IMAGE_CACHE_PATH}" < "${FILE_PATH}" \
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# && exit 6 || exit 1;;
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## Image
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image/*)
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local orientation
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orientation="$( identify -format '%[EXIF:Orientation]\n' -- "${FILE_PATH}" )"
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## If orientation data is present and the image actually
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## needs rotating ("1" means no rotation)...
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if [[ -n "$orientation" && "$orientation" != 1 ]]; then
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## ...auto-rotate the image according to the EXIF data.
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convert -- "${FILE_PATH}" -auto-orient "${IMAGE_CACHE_PATH}" && exit 6
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fi
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## `w3mimgdisplay` will be called for all images (unless overridden
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## as above), but might fail for unsupported types.
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exit 7;;
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## Video
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video/*)
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# Get embedded thumbnail
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ffmpeg -i "${FILE_PATH}" -map 0:v -map -0:V -c copy "${IMAGE_CACHE_PATH}" && exit 6
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# Get frame 10% into video
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ffmpegthumbnailer -i "${FILE_PATH}" -o "${IMAGE_CACHE_PATH}" -s 0 && exit 6
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exit 1;;
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## Audio
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audio/*)
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# Get embedded thumbnail
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ffmpeg -i "${FILE_PATH}" -map 0:v -map -0:V -c copy \
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"${IMAGE_CACHE_PATH}" && exit 6;;
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## PDF
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application/pdf)
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pdftoppm -f 1 -l 1 \
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-scale-to-x "${DEFAULT_SIZE%x*}" \
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-scale-to-y -1 \
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-singlefile \
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-jpeg -tiffcompression jpeg \
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-- "${FILE_PATH}" "${IMAGE_CACHE_PATH%.*}" \
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&& exit 6 || exit 1;;
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## ePub, MOBI, FB2 (using Calibre)
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# application/epub+zip|application/x-mobipocket-ebook|\
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# application/x-fictionbook+xml)
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# # ePub (using https://github.com/marianosimone/epub-thumbnailer)
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# epub-thumbnailer "${FILE_PATH}" "${IMAGE_CACHE_PATH}" \
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# "${DEFAULT_SIZE%x*}" && exit 6
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# ebook-meta --get-cover="${IMAGE_CACHE_PATH}" -- "${FILE_PATH}" \
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# >/dev/null && exit 6
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# exit 1;;
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## Font
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application/font*|application/*opentype)
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preview_png="/tmp/$(basename "${IMAGE_CACHE_PATH%.*}").png"
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if fontimage -o "${preview_png}" \
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--pixelsize "120" \
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--fontname \
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--pixelsize "80" \
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--text " ABCDEFGHIJKLMNOPQRSTUVWXYZ " \
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--text " abcdefghijklmnopqrstuvwxyz " \
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--text " 0123456789.:,;(*!?') ff fl fi ffi ffl " \
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--text " The quick brown fox jumps over the lazy dog. " \
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"${FILE_PATH}";
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then
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convert -- "${preview_png}" "${IMAGE_CACHE_PATH}" \
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&& rm "${preview_png}" \
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&& exit 6
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else
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exit 1
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fi
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;;
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## Preview archives using the first image inside.
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## (Very useful for comic book collections for example.)
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# application/zip|application/x-rar|application/x-7z-compressed|\
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# application/x-xz|application/x-bzip2|application/x-gzip|application/x-tar)
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# local fn=""; local fe=""
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# local zip=""; local rar=""; local tar=""; local bsd=""
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# case "${mimetype}" in
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# application/zip) zip=1 ;;
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# application/x-rar) rar=1 ;;
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# application/x-7z-compressed) ;;
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# *) tar=1 ;;
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# esac
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# { [ "$tar" ] && fn=$(tar --list --file "${FILE_PATH}"); } || \
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# { fn=$(bsdtar --list --file "${FILE_PATH}") && bsd=1 && tar=""; } || \
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# { [ "$rar" ] && fn=$(unrar lb -p- -- "${FILE_PATH}"); } || \
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# { [ "$zip" ] && fn=$(zipinfo -1 -- "${FILE_PATH}"); } || return
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#
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# fn=$(echo "$fn" | python -c "from __future__ import print_function; \
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# import sys; import mimetypes as m; \
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# [ print(l, end='') for l in sys.stdin if \
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# (m.guess_type(l[:-1])[0] or '').startswith('image/') ]" |\
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# sort -V | head -n 1)
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# [ "$fn" = "" ] && return
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# [ "$bsd" ] && fn=$(printf '%b' "$fn")
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#
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# [ "$tar" ] && tar --extract --to-stdout \
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# --file "${FILE_PATH}" -- "$fn" > "${IMAGE_CACHE_PATH}" && exit 6
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# fe=$(echo -n "$fn" | sed 's/[][*?\]/\\\0/g')
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# [ "$bsd" ] && bsdtar --extract --to-stdout \
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# --file "${FILE_PATH}" -- "$fe" > "${IMAGE_CACHE_PATH}" && exit 6
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# [ "$bsd" ] || [ "$tar" ] && rm -- "${IMAGE_CACHE_PATH}"
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# [ "$rar" ] && unrar p -p- -inul -- "${FILE_PATH}" "$fn" > \
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# "${IMAGE_CACHE_PATH}" && exit 6
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# [ "$zip" ] && unzip -pP "" -- "${FILE_PATH}" "$fe" > \
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# "${IMAGE_CACHE_PATH}" && exit 6
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# [ "$rar" ] || [ "$zip" ] && rm -- "${IMAGE_CACHE_PATH}"
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# ;;
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esac
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# openscad_image() {
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# TMPPNG="$(mktemp -t XXXXXX.png)"
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# openscad --colorscheme="${OPENSCAD_COLORSCHEME}" \
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# --imgsize="${OPENSCAD_IMGSIZE/x/,}" \
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# -o "${TMPPNG}" "${1}"
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# mv "${TMPPNG}" "${IMAGE_CACHE_PATH}"
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# }
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case "${FILE_EXTENSION_LOWER}" in
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## 3D models
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## OpenSCAD only supports png image output, and ${IMAGE_CACHE_PATH}
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## is hardcoded as jpeg. So we make a tempfile.png and just
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## move/rename it to jpg. This works because image libraries are
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## smart enough to handle it.
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# csg|scad)
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# openscad_image "${FILE_PATH}" && exit 6
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# ;;
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# 3mf|amf|dxf|off|stl)
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# openscad_image <(echo "import(\"${FILE_PATH}\");") && exit 6
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# ;;
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drawio)
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draw.io -x "${FILE_PATH}" -o "${IMAGE_CACHE_PATH}" \
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--width "${DEFAULT_SIZE%x*}" && exit 6
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exit 1;;
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esac
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}
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handle_mime() {
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local mimetype="${1}"
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case "${mimetype}" in
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## RTF and DOC
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text/rtf|*msword)
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## Preview as text conversion
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## note: catdoc does not always work for .doc files
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## catdoc: http://www.wagner.pp.ru/~vitus/software/catdoc/
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catdoc -- "${FILE_PATH}" && exit 5
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exit 1;;
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## DOCX, ePub, FB2 (using markdown)
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## You might want to remove "|epub" and/or "|fb2" below if you have
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## uncommented other methods to preview those formats
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*wordprocessingml.document|*/epub+zip|*/x-fictionbook+xml)
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## Preview as markdown conversion
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pandoc -s -t markdown -- "${FILE_PATH}" && exit 5
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exit 1;;
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## E-mails
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message/rfc822)
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## Parsing performed by mu: https://github.com/djcb/mu
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mu view -- "${FILE_PATH}" && exit 5
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exit 1;;
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## XLS
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*ms-excel)
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## Preview as csv conversion
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## xls2csv comes with catdoc:
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## http://www.wagner.pp.ru/~vitus/software/catdoc/
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xls2csv -- "${FILE_PATH}" && exit 5
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exit 1;;
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## Text
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text/* | */xml)
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## Syntax highlight
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if [[ "$( stat --printf='%s' -- "${FILE_PATH}" )" -gt "${HIGHLIGHT_SIZE_MAX}" ]]; then
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exit 2
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fi
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if [[ "$( tput colors )" -ge 256 ]]; then
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local pygmentize_format='terminal256'
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local highlight_format='xterm256'
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else
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local pygmentize_format='terminal'
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local highlight_format='ansi'
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fi
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env HIGHLIGHT_OPTIONS="${HIGHLIGHT_OPTIONS}" highlight \
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--out-format="${highlight_format}" \
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--force -- "${FILE_PATH}" && exit 5
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env COLORTERM=8bit bat --color=always --style="plain" \
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-- "${FILE_PATH}" && exit 5
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pygmentize -f "${pygmentize_format}" -O "style=${PYGMENTIZE_STYLE}"\
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-- "${FILE_PATH}" && exit 5
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exit 2;;
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## DjVu
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image/vnd.djvu)
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## Preview as text conversion (requires djvulibre)
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djvutxt "${FILE_PATH}" | fmt -w "${PV_WIDTH}" && exit 5
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exiftool "${FILE_PATH}" && exit 5
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exit 1;;
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## Image
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image/*)
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## Preview as text conversion
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# img2txt --gamma=0.6 --width="${PV_WIDTH}" -- "${FILE_PATH}" && exit 4
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exiftool "${FILE_PATH}" && exit 5
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exit 1;;
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## Video and audio
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video/* | audio/*)
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mediainfo "${FILE_PATH}" && exit 5
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exiftool "${FILE_PATH}" && exit 5
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exit 1;;
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## ELF files (executables and shared objects)
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application/x-executable | application/x-pie-executable | application/x-sharedlib)
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readelf -WCa "${FILE_PATH}" && exit 5
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exit 1;;
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esac
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}
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handle_fallback() {
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echo '----- File Type Classification -----' && file --dereference --brief -- "${FILE_PATH}" && exit 5
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exit 1
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}
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MIMETYPE="$( file --dereference --brief --mime-type -- "${FILE_PATH}" )"
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if [[ "${PV_IMAGE_ENABLED}" == 'True' ]]; then
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handle_image "${MIMETYPE}"
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fi
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handle_extension
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handle_mime "${MIMETYPE}"
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handle_fallback
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exit 1
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