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75 lines
2.4 KiB
Bash
75 lines
2.4 KiB
Bash
#!/usr/bin/env bash
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#
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# The purpose of this script is to demonstrate how to preview a file or an
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# image in the preview window of fzf.
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#
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# Dependencies:
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# - https://github.com/sharkdp/bat
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# - https://github.com/hpjansson/chafa
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# - https://iterm2.com/utilities/imgcat
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if [[ $# -ne 1 ]]; then
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>&2 echo "usage: $0 FILENAME"
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exit 1
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fi
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file=${1/#\~\//$HOME/}
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type=$(file --dereference --mime -- "$file")
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if [[ ! $type =~ image/ ]]; then
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if [[ $type =~ =binary ]]; then
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file "$1"
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exit
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fi
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# Sometimes bat is installed as batcat.
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if command -v batcat > /dev/null; then
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batname="batcat"
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elif command -v bat > /dev/null; then
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batname="bat"
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else
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cat "$1"
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exit
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fi
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${batname} --style="${BAT_STYLE:-numbers}" --color=always --pager=never -- "$file"
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exit
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fi
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dim=${FZF_PREVIEW_COLUMNS}x${FZF_PREVIEW_LINES}
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if [[ $dim = x ]]; then
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dim=$(stty size < /dev/tty | awk '{print $2 "x" $1}')
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elif ! [[ $KITTY_WINDOW_ID ]] && (( FZF_PREVIEW_TOP + FZF_PREVIEW_LINES == $(stty size < /dev/tty | awk '{print $1}') )); then
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# Avoid scrolling issue when the Sixel image touches the bottom of the screen
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# * https://github.com/junegunn/fzf/issues/2544
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dim=${FZF_PREVIEW_COLUMNS}x$((FZF_PREVIEW_LINES - 1))
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fi
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# 1. Use kitty icat on kitty terminal
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if [[ $KITTY_WINDOW_ID ]]; then
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# 1. 'memory' is the fastest option but if you want the image to be scrollable,
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# you have to use 'stream'.
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#
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# 2. The last line of the output is the ANSI reset code without newline.
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# This confuses fzf and makes it render scroll offset indicator.
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# So we remove the last line and append the reset code to its previous line.
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kitty icat --clear --transfer-mode=memory --unicode-placeholder --stdin=no --place="$dim@0x0" "$file" | sed '$d' | sed $'$s/$/\e[m/'
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# 2. Use chafa with Sixel output
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elif command -v chafa > /dev/null; then
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chafa -f sixel -s "$dim" "$file"
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# Add a new line character so that fzf can display multiple images in the preview window
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echo
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# 3. If chafa is not found but imgcat is available, use it on iTerm2
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elif command -v imgcat > /dev/null; then
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# NOTE: We should use https://iterm2.com/utilities/it2check to check if the
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# user is running iTerm2. But for the sake of simplicity, we just assume
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# that's the case here.
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imgcat -W "${dim%%x*}" -H "${dim##*x}" "$file"
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# 4. Cannot find any suitable method to preview the image
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else
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file "$file"
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fi
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