nnn

.npreview (4512B)

---

 #!/usr/bin/env sh
 
 # Description: Preview plugin for nnn's built-in preview pane
 # Auto-detected from plugins dir
 # Usage: .npreview <filepath> <width> <height>
 # All dependencies optional — graceful fallback to head/file/strings
 
 set -euf
 
 F="$1"
 W="${2:-80}"
 H="${3:-25}"
 ext="${F##*.}"
 ext="$(printf "%s" "$ext" | tr '[:upper:]' '[:lower:]')"
 
 has() { type "$1" >/dev/null 2>&1; }
 hd() { head -n "$H"; }
 
 # --- Handlers ---
 
 show_dir() {
     has tree && { tree -L 1 -n --dirsfirst --noreport "$F" | hd; return; }
     find "$F" -maxdepth 1 -print 2>/dev/null | hd
 }
 
 show_text() {
     has bat && { bat --style=plain --color=never --paging=never --line-range=":${H}" -- "$F" 2>/dev/null; return; }
     has batcat && { batcat --style=plain --color=never --paging=never --line-range=":${H}" -- "$F" 2>/dev/null; return; }
     head -n "$H" "$F"
 }
 
 show_pdf() {
     has pdftotext && { pdftotext -l 1 -nopgbrk -q -- "$F" - 2>/dev/null | hd; return; }
     has mutool && { mutool draw -F txt -i -- "$F" 1 2>/dev/null | hd; return; }
     show_meta
 }
 
 show_archive() {
     case "$ext" in
         rar) has unrar && { unrar lt -p- -- "$F" 2>/dev/null | hd; return; } ;;
         7z)  has 7z && { 7z l -p -- "$F" 2>/dev/null | hd; return; } ;;
     esac
     has atool && { atool --list -- "$F" 2>/dev/null | hd; return; }
     has bsdtar && { bsdtar --list --file "$F" 2>/dev/null | hd; return; }
     has tar && { tar tf "$F" 2>/dev/null | hd; return; }
     has unzip && [ "$ext" = "zip" ] && { unzip -l "$F" 2>/dev/null | hd; return; }
     printf "[archive %s]\n" "$(du -h "$F" 2>/dev/null | cut -f1)"
 }
 
 show_image() {
     has img2txt && { img2txt --gamma=0.6 --width="$W" -- "$F" 2>/dev/null | hd; return; }
     show_meta
 }
 
 show_meta() {
     has exiftool && { exiftool "$F" 2>/dev/null | hd; return; }
     has mediainfo && { mediainfo "$F" 2>/dev/null | hd; return; }
     has file && { file -b "$F"; return; }
     printf "[no metadata tool]\n"
 }
 
 show_json() {
     has jq && { head -c 65536 "$F" | jq --monochrome-output . 2>/dev/null | hd; return; }
     has python3 && { head -c 65536 "$F" | python3 -m json.tool 2>/dev/null | hd; return; }
     show_text
 }
 
 show_md() {
     has glow && { glow -s notty "$F" 2>/dev/null | hd; return; }
     has lowdown && { lowdown -Tterm "$F" 2>/dev/null | hd; return; }
     show_text
 }
 
 show_html() {
     has w3m && { w3m -dump "$F" 2>/dev/null | hd; return; }
     has lynx && { lynx -dump -- "$F" 2>/dev/null | hd; return; }
     show_text
 }
 
 show_elf() {
     has readelf && { readelf -h "$F" 2>/dev/null | hd; return; }
     has objdump && { objdump -f "$F" 2>/dev/null | hd; return; }
     has file && file -b "$F"
 }
 
 show_doc() {
     has odt2txt && { odt2txt "$F" 2>/dev/null | hd; return; }
     show_meta
 }
 
 show_bin() {
     has strings && { printf "[binary]\n"; strings "$F" 2>/dev/null | hd; return; }
     printf "[binary %s]\n" "$(du -h "$F" 2>/dev/null | cut -f1)"
 }
 
 # --- Directory ---
 [ -d "$F" ] && { show_dir; exit 0; }
 
 # --- Dispatch by extension ---
 case "$ext" in
     a|ace|alz|arc|arj|bz|bz2|cab|cpio|deb|gz|jar|lha|lz|lzh|lzma|lzo|\
     rpm|rz|t7z|tar|tbz|tbz2|tgz|tlz|txz|tz|tzo|war|xpi|xz|z|zip|rar|7z|zst)
         show_archive; exit 0 ;;
     pdf) show_pdf; exit 0 ;;
     md|mkd|markdown) show_md; exit 0 ;;
     htm|html|xhtml) show_html; exit 0 ;;
     json) show_json; exit 0 ;;
     odt|ods|odp|sxw) show_doc; exit 0 ;;
     torrent) has transmission-show && { transmission-show -- "$F" 2>/dev/null | hd; exit 0; } ;;
     sqlite|sqlite3|db) has sqlite3 && { printf ".tables\n" | sqlite3 "$F" 2>/dev/null | hd; exit 0; } ;;
     o|so|dylib) show_elf; exit 0 ;;
     c|cc|cpp|h|hpp|rs|go|py|rb|js|ts|java|sh|bash|zsh|pl|lua|vim|el|\
     css|scss|yaml|yml|toml|ini|conf|xml|sql|diff|patch|awk|sed|make)
         show_text; exit 0 ;;
 esac
 
 # --- Dispatch by mime type ---
 has file || { show_text; exit 0; }
 mime="$(file -bL --mime-type -- "$F" 2>/dev/null)"
 
 case "$mime" in
     text/*|*/xml) show_text ;;
     application/json) show_json ;;
     application/pdf) show_pdf ;;
     application/zip|application/x-tar|application/x-rar*|\
     application/x-7z*|application/x-bzip*|application/x-xz|\
     application/x-compress*|application/gzip|application/zstd)
         show_archive ;;
     image/*) show_image ;;
     audio/*|video/*) show_meta ;;
     application/x-executable|application/x-sharedlib|application/x-pie-executable|\
     application/x-object) show_elf ;;
     application/vnd.openxmlformats*|application/vnd.oasis.opendocument*) show_doc ;;
     *) show_bin ;;
 esac