dotfiles-arch/.config/ranger/scope.sh
2024-01-22 18:51:58 -05:00

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#!/usr/bin/env bash
set -o noclobber -o noglob -o nounset -o pipefail
IFS=$'\n'
## If the option `use_preview_script` is set to `true`,
## then this script will be called and its output will be displayed in ranger.
## ANSI color codes are supported.
## STDIN is disabled, so interactive scripts won't work properly
## This script is considered a configuration file and must be updated manually.
## It will be left untouched if you upgrade ranger.
## Because of some automated testing we do on the script #'s for comments need
## to be doubled up. Code that is commented out, because it's an alternative for
## example, gets only one #.
## Meanings of exit codes:
## code | meaning | action of ranger
## -----+------------+-------------------------------------------
## 0 | success | Display stdout as preview
## 1 | no preview | Display no preview at all
## 2 | plain text | Display the plain content of the file
## 3 | fix width | Don't reload when width changes
## 4 | fix height | Don't reload when height changes
## 5 | fix both | Don't ever reload
## 6 | image | Display the image `$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)
## shellcheck disable=SC2034 # PV_HEIGHT is provided for convenience and unused
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="$(printf "%s" "${FILE_EXTENSION}" | tr '[:upper:]' '[:lower:]')"
## Settings
HIGHLIGHT_SIZE_MAX=262143 # 256KiB
HIGHLIGHT_TABWIDTH=${HIGHLIGHT_TABWIDTH:-8}
HIGHLIGHT_STYLE=${HIGHLIGHT_STYLE:-pablo}
HIGHLIGHT_OPTIONS="--replace-tabs=${HIGHLIGHT_TABWIDTH} --style=${HIGHLIGHT_STYLE} ${HIGHLIGHT_OPTIONS:-}"
PYGMENTIZE_STYLE=${PYGMENTIZE_STYLE:-autumn}
OPENSCAD_IMGSIZE=${RNGR_OPENSCAD_IMGSIZE:-1000,1000}
OPENSCAD_COLORSCHEME=${RNGR_OPENSCAD_COLORSCHEME:-Tomorrow Night}
handle_extension() {
case "${FILE_EXTENSION_LOWER}" in
## OpenDocument
odt|ods|odp|sxw)
## Preview as markdown conversion
pandoc -s -t markdown -- "${FILE_PATH}" && exit 5
exit 1;;
## HTML
htm|html|xhtml)
## Preview as text conversion
lynx -dump -- "${FILE_PATH}" && exit 5
exit 1;;
## JSON
json)
jq --color-output . "${FILE_PATH}" && exit 5
exit 1;;
esac
}
handle_image() {
local DEFAULT_SIZE="1920x1080"
local mimetype="${1}"
case "${mimetype}" in
## Image
image/*)
local orientation
orientation="$( identify -format '%[EXIF:Orientation]\n' -- "${FILE_PATH}" )"
if [[ -n "$orientation" && "$orientation" != 1 ]]; then
convert -- "${FILE_PATH}" -auto-orient "${IMAGE_CACHE_PATH}" && exit 6
fi
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 "${DEFAULT_SIZE%x*}" \
-scale-to-y -1 \
-singlefile \
-jpeg -tiffcompression jpeg \
-- "${FILE_PATH}" "${IMAGE_CACHE_PATH%.*}" \
&& exit 6 || exit 1;;
esac
}
handle_mime() {
local mimetype="${1}"
case "${mimetype}" in
## Text
text/* | */xml)
## Syntax highlight
if [[ "$( stat --printf='%s' -- "${FILE_PATH}" )" -gt "${HIGHLIGHT_SIZE_MAX}" ]]; then
exit 2
fi
if [[ "$( tput colors )" -ge 256 ]]; then
local pygmentize_format='terminal256'
local highlight_format='xterm256'
else
local pygmentize_format='terminal'
local highlight_format='ansi'
fi
env HIGHLIGHT_OPTIONS="${HIGHLIGHT_OPTIONS}" highlight \
--out-format="${highlight_format}" \
--force -- "${FILE_PATH}" && exit 5
env COLORTERM=8bit bat --color=always --style="plain" \
-- "${FILE_PATH}" && exit 5
pygmentize -f "${pygmentize_format}" -O "style=${PYGMENTIZE_STYLE}"\
-- "${FILE_PATH}" && exit 5
exit 2;;
## Media
image/* | video/* | audio/*)
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