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- #!/bin/bash
- # ranger supports enhanced previews. If the option "use_preview_script"
- # is set to True (by default it's False), this script will be called
- # and its output is displayed in ranger. ANSI color codes are supported.
- # NOTES: This script is considered a configuration file. If you upgrade
- # ranger, it will be left untouched. (You must update it yourself.)
- # Also, ranger disables STDIN here, so interactive scripts won't work properly
- # Meanings of exit codes:
- # code | meaning | action of ranger
- # -----+------------+-------------------------------------------
- # 0 | success | success. display stdout as preview
- # 1 | no preview | failure. display no preview at all
- # 2 | plain text | display the plain content of the file
- # 3 | fix width | success. Don't reload when width changes
- # 4 | fix height | success. Don't reload when height changes
- # 5 | fix both | success. Don't ever reload
- # Meaningful aliases for arguments:
- path="$1" # Full path of the selected file
- width="$2" # Width of the preview pane (number of fitting characters)
- height="$3" # Height of the preview pane (number of fitting characters)
- maxln=200 # Stop after $maxln lines. Can be used like ls | head -n $maxln
- # Find out something about the file:
- mimetype=$(file --mime-type -Lbk "$path")
- extension=$(echo "$path" | grep '\.' | grep -o '[^.]\+$')
- # Functions:
- # "have $1" succeeds if $1 is an existing command/installed program
- function have { type -P "$1" > /dev/null; }
- # "success" returns the exit code of the first program in the last pipe chain
- function success { test ${PIPESTATUS[0]} = 0 -o ${PIPESTATUS[0]} = 141; }
- case "$extension" in
- # Archive extensions:
- 7z|a|ace|alz|arc|arj|bz|bz2|cab|cpio|deb|gz|jar|lha|lz|lzh|lzma|lzo|\
- rar|rpm|rz|t7z|tar|tbz|tbz2|tgz|tlz|txz|tZ|tzo|war|xpi|xz|Z|zip)
- als "$path" | head -n $maxln
- success && exit 0 || acat "$path" | head -n $maxln && exit 3
- exit 1;;
- # PDF documents:
- pdf)
- pdftotext -l 10 -nopgbrk -q "$path" - | head -n $maxln | fmt -s -w $width
- success && exit 0 || exit 1;;
- # BitTorrent Files
- torrent)
- torri "$path" | head -n $maxln && exit 0
- exit 1;;
- # HTML Pages:
- htm|html|xhtml)
- have w3m && w3m -dump "$path" | head -n $maxln | fmt -s -w $width && exit 4
- have lynx && lynx -dump "$path" | head -n $maxln | fmt -s -w $width && exit 4
- have elinks && elinks -dump "$path" | head -n $maxln | fmt -s -w $width && exit 4
- ;; # fall back to highlight/cat if theres no lynx/elinks
- esac
- case "$mimetype" in
- *perl)
- highlight --out-format=ansi -S Perl "$path" | head -n $maxln
- success && exit 5 || exit 2;;
- *python)
- highlight --out-format=ansi -S Python "$path" | head -n $maxln
- success && exit 5 || exit 2;;
- # Syntax highlight for text files:
- text/* | */xml)
- highlight --out-format=ansi "$path" | head -n $maxln
- success && exit 5 || exit 2;;
- # Ascii-previews of images:
- image/*)
- img2txt --gamma=0.6 --width="$width" "$path" && exit 4 || exit 1;;
- # Display information about media files:
- video/* | audio/*)
- # Use sed to remove spaces so the output fits into the narrow window
- mediainfo "$path" | sed 's/ \+:/: /;'
- success && exit 5 || exit 1;;
- esac
- exit 1
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