154 lines
5.1 KiB
Bash
Executable file
154 lines
5.1 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 "${FILE_EXTENSION_LOWER}" in
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## OpenDocument
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odt|ods|odp|sxw)
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## Preview as markdown conversion
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pandoc -s -t markdown -- "${FILE_PATH}" && exit 5
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exit 1;;
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## HTML
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htm|html|xhtml)
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## Preview as text conversion
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lynx -dump -- "${FILE_PATH}" && exit 5
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exit 1;;
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## JSON
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json)
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jq --color-output . "${FILE_PATH}" && exit 5
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exit 1;;
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esac
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}
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handle_image() {
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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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## 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 [[ -n "$orientation" && "$orientation" != 1 ]]; then
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convert -- "${FILE_PATH}" -auto-orient "${IMAGE_CACHE_PATH}" && exit 6
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fi
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exit 7;;
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## Video
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video/*)
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# Thumbnail
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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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## 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}" "${IMAGE_CACHE_PATH%.*}" \
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&& exit 6 || exit 1;;
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esac
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}
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handle_mime() {
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local mimetype="${1}"
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case "${mimetype}" in
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## Text
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text/* | */xml)
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## Syntax highlight
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if [[ "$( 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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## Media
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image/* | video/* | audio/*)
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exiftool "${FILE_PATH}" && exit 5
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exit 1;;
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esac
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}
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handle_fallback() {
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echo '----- File Type Classification -----' && file --dereference --brief -- "${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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