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230fc49ae2
Close #1102 fzf --preview 'imgcat -W $FZF_PREVIEW_COLUMNS -H $FZF_PREVIEW_LINES {}' Notes: * There is no good way to determine the height of the rendered image, so we assume that the image takes the full height of the preview window. So the image cannot be displayed with the other text. * fzf-preview.sh script was updated to use `imgcat` if it's available but `chafa` is not. * iTerm2 also supports Sixel, so adding support for this protocol is not quite necessary but it renders animated GIFs much better (e.g. looping).
75 lines
2.3 KiB
Bash
Executable File
75 lines
2.3 KiB
Bash
Executable File
#!/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 [[ $KITTY_WINDOW_ID ]]; then
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# 1. 'memory' is the fastest option but if you want the image to be scrollable,
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# you have to use 'stream'.
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#
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# 2. The last line of the output is the ANSI reset code without newline.
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# This confuses fzf and makes it render scroll offset indicator.
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# So we remove the last line and append the reset code to its previous line.
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kitty icat --clear --transfer-mode=memory --stdin=no --place="$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" "$file"
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# Add a new line character so that fzf can display multiple images in the preview window
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echo
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# 3. If chafa is not found but imgcat is available, use it on iTerm2
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elif command -v imgcat > /dev/null; then
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# NOTE: We should use https://iterm2.com/utilities/it2check to check if the
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# user is running iTerm2. But for the sake of simplicty, we just assume
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# that's the case here.
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imgcat -W "${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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