159 lines
4 KiB
Bash
Executable file
159 lines
4 KiB
Bash
Executable file
#!/usr/bin/env sh
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SPLIT="$SPLIT"
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TERMINAL="$TERMINAL"
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USE_SCOPE="${USE_SCOPE:-0}"
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IN_KITTY=0
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[ -n "$KITTY_WINDOW_ID" ] && kitty @ ls --no-response >/dev/null 2>&1 && IN_KITTY=1
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if [ -e "${TMUX%%,*}" ] && tmux -V | grep -q '[ -][3456789]\.'; then
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TERMINAL=tmux
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elif [ "$IN_KITTY" == 1 ]; then
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TERMINAL=kitty
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else
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TERMINAL="${TERMINAL:-xterm}"
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fi
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if [ -z "$SPLIT" ] && [ $(($(tput lines) * 2)) -gt "$(tput cols)" ]; then
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SPLIT='h'
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elif [ "$SPLIT" != 'h' ]; then
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SPLIT='v'
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fi
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exists() {
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which "$1" >/dev/null 2>&1
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}
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fifo_pager() {
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cmd="$1"; shift
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tmpfifopath="${TMPDIR:-/tmp}/nnn-preview-tui-fifo.$$"
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mkfifo "$tmpfifopath" || return
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$PAGER < "$tmpfifopath" &
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(
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exec > "$tmpfifopath"
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"$cmd" "$@" &
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)
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rm "$tmpfifopath"
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}
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print_bin_info() {
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printf -- "-------- \033[1;31mBinary file\033[0m --------\n"
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if exists mediainfo; then
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mediainfo "$1" 2>/dev/null
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else
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file -b "$1"
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# TODO: hexyl?
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fi
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}
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preview_file () {
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kill %- %+ 2>/dev/null && wait %- %+ 2>/dev/null
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clear
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# Trying to use pistol if it's available.
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# if [ "$USE_PISTOL" -ne 0 ] && exists pistol; then
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# fifo_pager pistol "$1"
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# return
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# fi
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# Detecting the exact type of the file: the encoding, mime type, and
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# extension in lowercase.
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encoding="$(file -Lb --mime-encoding -- "$1")"
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mimetype="$(file -Lb --mime-type -- "$1")"
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ext="${1##*.}"
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if [ -n "$ext" ]; then
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ext="$(printf "%s" "${ext}" | tr '[:upper:]' '[:lower:]')"
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fi
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lines=$(($(tput lines)-1))
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cols=$(tput cols)
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# Otherwise, falling back to the defaults.
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if [ -d "$1" ]; then
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cd "$1" || return
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if exists exa; then
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fifo_pager exa --tree --level 3 --colour=always 2>/dev/null
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elif exists tree; then
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fifo_pager tree -L 3 -F
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else
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fifo_pager ls --color=always
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fi
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elif [ "$encoding" = "binary" ]; then
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if [ "${mimetype%%/*}" = "image" ] ; then
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if [ "$IN_KITTY" = "1" ]; then
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# Kitty terminal users can use the native image preview method.
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kitty +kitten icat --silent --transfer-mode=stream --stdin=no "$1" &
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elif exists catimg; then
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catimg "$1"
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elif exists viu; then
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viu -t "$1"
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else
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fifo_pager print_bin_info "$1"
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fi
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elif [ "$mimetype" = "application/zip" ] ; then
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fifo_pager unzip -l "$1"
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elif [ "$ext" = "gz" ] || [ "$ext" = "bz2" ] ; then
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fifo_pager tar -tvf "$1"
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else
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fifo_pager print_bin_info "$1"
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fi
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elif [ "$mimetype" = "text/troff" ] ; then
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fifo_pager man -Pcat -l "$1"
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else
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if exists bat; then
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fifo_pager bat --terminal-width="$cols" --paging=never --decorations=always --color=always \
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"$1" 2>/dev/null
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else
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$PAGER "$1" &
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fi
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fi
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}
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if [ "$PREVIEW_MODE" ] ; then
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if [ ! -r "$NNN_FIFO" ] ; then
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echo "No FIFO available! (\$NNN_FIFO='$NNN_FIFO')" >&2
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read -r
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exit 1
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fi
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preview_file "$1"
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# use cat instead of 'exec <' to avoid issues with dash shell
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# shellcheck disable=SC2002
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cat "$NNN_FIFO" | \
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while read -r selection ; do
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preview_file "$selection"
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done
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# TODO: detect if file is opened and close preview until back in nnn
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# Restoring the previous layout for kitty users. This will only work for
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# kitty >= 0.18.0.
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if [ "$TERMINAL" = "kitty" ]; then
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kitty @ last-used-layout --no-response >/dev/null 2>&1
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fi
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exit 0
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fi
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if [ "$TERMINAL" = "tmux" ]; then
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# tmux splits are inverted
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if [ "$SPLIT" = "v" ]; then SPLIT="h"; else SPLIT="v"; fi
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tmux split-window -e "NNN_FIFO=$NNN_FIFO" -e "PREVIEW_MODE=1" -d"$SPLIT" "$0" "$1"
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elif [ "$TERMINAL" = "kitty" ]; then
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# Setting the layout for the new window. It will be restored after the
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# script ends.
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kitty @ goto-layout splits >/dev/null
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# Trying to use kitty's integrated window management as the split window.
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# All environmental variables that will be used in the new window must
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# be explicitly passed.
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kitty @ launch --no-response --title "nnn preview" --keep-focus \
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--cwd "$PWD" --env "PATH=$PATH" --env "NNN_FIFO=$NNN_FIFO" \
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--env "PREVIEW_MODE=1" --env "PAGER=$PAGER" \
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--env "USE_SCOPE=$USE_SCOPE" --env "SPLIT=$SPLIT" \
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--env "USE_PISTOL=$USE_PISTOL" \
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--location "${SPLIT}split" "$0" "$1" >/dev/null
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else
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PREVIEW_MODE=1 $TERMINAL -e "$0" "$1" &
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fi
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