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#!/usr/bin/env sh |
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# ranger supports enhanced previews. If the option "use_preview_script" |
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# is set to True and this file exists, this script will be called and its |
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# output is displayed in ranger. ANSI color codes are supported. |
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# NOTES: This script is considered a configuration file. If you upgrade |
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# ranger, it will be left untouched. (You must update it yourself.) |
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# Also, ranger disables STDIN here, so interactive scripts won't work properly |
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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 | success. display stdout as preview |
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# 1 | no preview | failure. 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 | success. Don't reload when width changes |
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# 4 | fix height | success. Don't reload when height changes |
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# 5 | fix both | success. Don't ever reload |
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# 6 | image | success. display the image $cached points to as an image preview |
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# Meaningful aliases for arguments: |
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path="$1" # Full path of the selected file |
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width="$2" # Width of the preview pane (number of fitting characters) |
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height="$3" # Height of the preview pane (number of fitting characters) |
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cached="$4" # Path that should be used to cache image previews |
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maxln=200 # Stop after $maxln lines. Can be used like ls | head -n $maxln |
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# Find out something about the file: |
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mimetype=$(file --mime-type -Lb "$path") |
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extension=$(/bin/echo -E "${path##*.}" | tr "[:upper:]" "[:lower:]") |
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# Functions: |
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# runs a command and saves its output into $output. Useful if you need |
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# the return value AND want to use the output in a pipe |
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try() { output=$(eval '"$@"'); } |
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# writes the output of the previously used "try" command |
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dump() { /bin/echo -E "$output"; } |
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# a common post-processing function used after most commands |
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trim() { head -n "$maxln"; } |
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# wraps highlight to treat exit code 141 (killed by SIGPIPE) as success |
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highlight() { command highlight "$@"; test $? = 0 -o $? = 141; } |
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case "$extension" in |
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# Archive extensions: |
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7z|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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try als "$path" && { dump | trim; exit 0; } |
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try acat "$path" && { dump | trim; exit 3; } |
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try bsdtar -lf "$path" && { dump | trim; exit 0; } |
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exit 1;; |
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rar) |
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try unrar -p- lt "$path" && { dump | trim; exit 0; } || exit 1;; |
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# PDF documents: |
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pdf) |
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try pdftotext -l 10 -nopgbrk -q "$path" - && \ |
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{ dump | trim | fmt -s -w $width; exit 0; } || exit 1;; |
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# BitTorrent Files |
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torrent) |
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try transmission-show "$path" && { dump | trim; exit 5; } || exit 1;; |
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# HTML Pages: |
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htm|html|xhtml) |
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try w3m -dump "$path" && { dump | trim | fmt -s -w $width; exit 4; } |
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try lynx -dump "$path" && { dump | trim | fmt -s -w $width; exit 4; } |
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try elinks -dump "$path" && { dump | trim | fmt -s -w $width; exit 4; } |
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;; # fall back to highlight/cat if the text browsers fail |
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esac |
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case "$mimetype" in |
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# Syntax highlight for text files: |
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text/* | */xml) |
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try highlight --out-format=ansi "$path" && { dump | trim; exit 5; } || exit 2;; |
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# Ascii-previews of images: |
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image/*) |
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img2txt --gamma=0.6 --width="$width" "$path" && exit 4 || exit 1;; |
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# Image preview for videos, disabled by default: |
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# video/*) |
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# ffmpegthumbnailer -i "$path" -o "$cached" -s 0 && exit 6 || exit 1;; |
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# Display information about media files: |
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video/* | audio/*) |
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exiftool "$path" && exit 5 |
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# Use sed to remove spaces so the output fits into the narrow window |
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try mediainfo "$path" && { dump | trim | sed 's/ \+:/: /;'; exit 5; } || exit 1;; |
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esac |
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exit 1 |
