Init commit

1 files changed, 89 insertions, 0 deletions

diff --git a/scope.sh b/scope.sh
new file mode 100755
index 0000000..ed7c313
--- /dev/null
+++ b/scope.sh
@@ -0,0 +1,89 @@
+#!/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