85 lines
3.4 KiB
Bash
85 lines
3.4 KiB
Bash
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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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# 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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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 "$path")
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extension=${path##*.}
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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 '"$@"'); }
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# writes the output of the previouosly used "try" command
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dump() { echo "$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" "$path" && exit 4 || exit 1;;
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# Display information about media files:
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video/* | audio/*)
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exiftool "$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
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