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authorKarel Kočí <karel.koci@nic.cz>2017-01-09 08:10:37 +0100
committerKarel Kočí <karel.koci@nic.cz>2017-01-09 08:10:37 +0100
commitd7f2a7bc49ee1f52dfecd84fd1e04612db89036e (patch)
treea45fa7e871d235139db1fee1cdd1d584b8c8e45c /config/ranger/scope.sh
parent95865067af8988cb81bf89352fae3961d12a4a9e (diff)
parent30791e34030b2c31ecd726d892f24ff839a7a0fc (diff)
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Merge branch 'master' of cynerd.cz:myconfigs
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+#!/usr/bin/env sh
+# ranger supports enhanced previews. If the option "use_preview_script"
+# is set to True and this file exists, 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
+# 6 | image | success. display the image $cached points to as an image preview
+
+# 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)
+cached="$4" # Path that should be used to cache image previews
+
+maxln=200 # Stop after $maxln lines. Can be used like ls | head -n $maxln
+
+# Find out something about the file:
+mimetype=$(file --mime-type -Lb "$path")
+extension=$(/bin/echo "${path##*.}" | tr "[:upper:]" "[:lower:]")
+
+# Functions:
+# runs a command and saves its output into $output. Useful if you need
+# the return value AND want to use the output in a pipe
+try() { output=$(eval '"$@"'); }
+
+# writes the output of the previously used "try" command
+dump() { /bin/echo "$output"; }
+
+# a common post-processing function used after most commands
+trim() { head -n "$maxln"; }
+
+# wraps highlight to treat exit code 141 (killed by SIGPIPE) as success
+highlight() { command highlight "$@"; test $? = 0 -o $? = 141; }
+
+case "$extension" in
+ # Archive extensions:
+ 7z|a|ace|alz|arc|arj|bz|bz2|cab|cpio|deb|gz|jar|lha|lz|lzh|lzma|lzo|\
+ rpm|rz|t7z|tar|tbz|tbz2|tgz|tlz|txz|tZ|tzo|war|xpi|xz|Z|zip)
+ try als "$path" && { dump | trim; exit 0; }
+ try acat "$path" && { dump | trim; exit 3; }
+ try bsdtar -lf "$path" && { dump | trim; exit 0; }
+ exit 1;;
+ rar)
+ try unrar -p- lt "$path" && { dump | trim; exit 0; } || exit 1;;
+ # PDF documents:
+ pdf)
+ try pdftotext -l 10 -nopgbrk -q "$path" - && \
+ { dump | trim | fmt -s -w $width; exit 0; } || exit 1;;
+ # BitTorrent Files
+ torrent)
+ try transmission-show "$path" && { dump | trim; exit 5; } || exit 1;;
+ # HTML Pages:
+ htm|html|xhtml)
+ try w3m -dump "$path" && { dump | trim | fmt -s -w $width; exit 4; }
+ try lynx -dump "$path" && { dump | trim | fmt -s -w $width; exit 4; }
+ try elinks -dump "$path" && { dump | trim | fmt -s -w $width; exit 4; }
+ ;; # fall back to highlight/cat if the text browsers fail
+esac
+
+case "$mimetype" in
+ # Syntax highlight for text files:
+ text/* | */xml)
+ try highlight --out-format=ansi "$path" && { dump | trim; exit 5; } || exit 2;;
+ # Ascii-previews of images:
+ image/*)
+ img2txt --gamma=0.6 --width="$width" "$path" && exit 4 || exit 1;;
+ # Image preview for videos, disabled by default:
+ # video/*)
+ # ffmpegthumbnailer -i "$path" -o "$cached" -s 0 && exit 6 || exit 1;;
+ # Display information about media files:
+ video/* | audio/*)
+ exiftool "$path" && exit 5
+ # Use sed to remove spaces so the output fits into the narrow window
+ try mediainfo "$path" && { dump | trim | sed 's/ \+:/: /;'; exit 5; } || exit 1;;
+esac
+
+exit 1