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authorBenjamin Chausse <benjamin@chausse.xyz>2024-04-12 17:49:36 -0400
committerBenjamin Chausse <benjamin@chausse.xyz>2024-04-12 17:49:36 -0400
commitf0f6df63b64415d4591564c99f42362d1c526265 (patch)
tree284ed9117150fdc71d82899748c9c7cedb4c3e0e /.config/lf/scope
parentfb33ed3e6f9afce7dc2308c0580b13a569372a3c (diff)
Sixel previews with lf
Diffstat (limited to '.config/lf/scope')
-rwxr-xr-x.config/lf/scope130
1 files changed, 85 insertions, 45 deletions
diff --git a/.config/lf/scope b/.config/lf/scope
index cc55669..139a5af 100755
--- a/.config/lf/scope
+++ b/.config/lf/scope
@@ -1,56 +1,96 @@
#!/bin/sh
-# File preview handler for lf.
-
set -C -f
-IFS="$(printf '%b_' '\n')"; IFS="${IFS%_}"
-
-image() {
- if [ -f "$1" ] && [ -n "$DISPLAY" ] && [ -z "$WAYLAND_DISPLAY" ] && command -V ueberzug >/dev/null 2>&1; then
- printf '{"action": "add", "identifier": "PREVIEW", "x": "%s", "y": "%s", "width": "%s", "height": "%s", "scaler": "contain", "path": "%s"}\n' "$4" "$5" "$(($2-1))" "$(($3-1))" "$1" > "$FIFO_UEBERZUG"
- else
- mediainfo "$6"
- fi
+IFS="$(printf '%b_' '\n')"
+IFS="${IFS%_}"
+
+PREVIEW_DIR="${XDG_CACHE_HOME:-$HOME/.cache}/lf"
+PREVIEW_WIDTH=600 # px
+
+# TODO: Render in the original width when it's smaller than PREVIEW_WIDTH
+
+# PrefixGen: generates a hash prefix for the given file
+# This is a unique identifier for the file to preview
+PrefixGen() {
+ sha256sum "$(readlink -f "$1")" | cut -d' ' -f1
}
-ifub() {
- [ -n "$DISPLAY" ] && [ -z "$WAYLAND_DISPLAY" ] && command -V ueberzug >/dev/null 2>&1
+# SuffixGen: generates a hash suffix for the given file
+# This suffix is used to determine if the preview is outdated
+SuffixGen() {
+ stat -Lc "%Y" "$1"
}
-# Note that the cache file name is a function of file information, meaning if
-# an image appears in multiple places across the machine, it will not have to
-# be regenerated once seen.
+# Prevent recursive thumbnails (if the file ends in .six)
+[ "${1##*.}" = "six" ] && cat "$1" && exit 1
case "$(file --dereference --brief --mime-type -- "$1")" in
- image/avif) CACHE="${XDG_CACHE_HOME:-$HOME/.cache}/lf/thumb.$(stat --printf '%n\0%i\0%F\0%s\0%W\0%Y' -- "$(readlink -f "$1")" | sha256sum | cut -d' ' -f1)"
- [ ! -f "$CACHE" ] && convert "$1" "$CACHE.jpg"
- image "$CACHE.jpg" "$2" "$3" "$4" "$5" "$1" ;;
- image/vnd.djvu)
- CACHE="${XDG_CACHE_HOME:-$HOME/.cache}/lf/thumb.$(stat --printf '%n\0%i\0%F\0%s\0%W\0%Y' -- "$(readlink -f "$1")" | sha256sum | cut -d' ' -f1)"
- [ ! -f "$CACHE" ] && djvused "$1" -e 'select 1; save-page-with /dev/stdout' | convert -density 200 - "$CACHE.jpg" > /dev/null 2>&1
- image "$CACHE.jpg" "$2" "$3" "$4" "$5" "$1" ;;
- image/*) image "$1" "$2" "$3" "$4" "$5" "$1" ;;
- text/html) lynx -width="$4" -display_charset=utf-8 -dump "$1" ;;
- text/troff) man ./ "$1" | col -b ;;
- text/* | */xml | application/json | application/x-ndjson) bat --terminal-width "$(($4-2))" -f "$1" ;;
- audio/* | application/octet-stream) mediainfo "$1" || exit 1 ;;
- video/* )
- CACHE="${XDG_CACHE_HOME:-$HOME/.cache}/lf/thumb.$(stat --printf '%n\0%i\0%F\0%s\0%W\0%Y' -- "$(readlink -f "$1")" | sha256sum | cut -d' ' -f1)"
- [ ! -f "$CACHE" ] && ffmpegthumbnailer -i "$1" -o "$CACHE" -s 0
- image "$CACHE" "$2" "$3" "$4" "$5" "$1"
- ;;
- */pdf)
- CACHE="${XDG_CACHE_HOME:-$HOME/.cache}/lf/thumb.$(stat --printf '%n\0%i\0%F\0%s\0%W\0%Y' -- "$(readlink -f "$1")" | sha256sum | cut -d' ' -f1)"
- [ ! -f "$CACHE.jpg" ] && pdftoppm -jpeg -f 1 -singlefile "$1" "$CACHE"
- image "$CACHE.jpg" "$2" "$3" "$4" "$5" "$1"
- ;;
- */epub+zip|*/mobi*)
- CACHE="${XDG_CACHE_HOME:-$HOME/.cache}/lf/thumb.$(stat --printf '%n\0%i\0%F\0%s\0%W\0%Y' -- "$(readlink -f "$1")" | sha256sum | cut -d' ' -f1)"
- [ ! -f "$CACHE.jpg" ] && gnome-epub-thumbnailer "$1" "$CACHE.jpg"
- image "$CACHE.jpg" "$2" "$3" "$4" "$5" "$1"
- ;;
- application/*zip) atool --list -- "$1" ;;
- *opendocument*) odt2txt "$1" ;;
- application/pgp-encrypted) gpg -d -- "$1" ;;
+text/html)
+ lynx -width="$4" -display_charset=utf-8 -dump "$1"
+ ;;
+text/troff)
+ man ./ "$1" | col -b
+ ;;
+text/* | */xml | application/json | application/x-ndjson)
+ bat --terminal-width "$(($4 - 2))" -f "$1"
+ ;;
+audio/* | application/octet-stream)
+ mediainfo "$1" || exit 1
+ ;;
+image/vnd.djvu)
+ prefix="$(PrefixGen "$1")"
+ suffix="$(SuffixGen "$1")"
+ filename="$prefix-$suffix"
+ [ ! -f "$PREVIEW_DIR/$filename.six" ] && {
+ rm -f "$PREVIEW_DIR/$prefix-*"
+ djvused "$1" -e 'select 1; save-page-with /dev/stdout' |
+ convert djvu:- png:- |
+ img2sixel -S -E size -q high -w $PREVIEW_WIDTH -o "$PREVIEW_DIR/$filename.six"
+ }
+ cat "$PREVIEW_DIR/$filename.six"
+ ;;
+image/*)
+ prefix="$(PrefixGen "$1")"
+ suffix="$(SuffixGen "$1")"
+ filename="$prefix-$suffix"
+ [ ! -f "$PREVIEW_DIR/$filename.six" ] && {
+ rm -f "$PREVIEW_DIR/$prefix-*"
+ img2sixel -S -E size -q high -w $PREVIEW_WIDTH "$1" -o "$PREVIEW_DIR/$filename.six"
+ }
+ cat "$PREVIEW_DIR/$filename.six"
+ ;;
+*/pdf)
+ prefix="$(PrefixGen "$1")"
+ suffix="$(SuffixGen "$1")"
+ filename="$prefix-$suffix"
+ [ ! -f "$PREVIEW_DIR/$filename.six" ] && {
+ rm -f "$PREVIEW_DIR/$prefix-*"
+ pdftocairo -singlefile -scale-to-x $PREVIEW_WIDTH -scale-to-y -1 -png "$1" - |
+ img2sixel -S -E size -q high -o "$PREVIEW_DIR/$filename.six"
+ }
+ cat "$PREVIEW_DIR/$filename.six"
+ ;;
+video/*)
+ prefix="$(PrefixGen "$1")"
+ suffix="$(SuffixGen "$1")"
+ filename="$prefix-$suffix"
+ # XXX: thumbnail seems to get re-generated every time the file is selected
+ [ ! -f "$PREVIEW_DIR/$filename.six" ] && {
+ rm -f "$PREVIEW_DIR/$prefix-*"
+ ffmpegthumbnailer -i "$1" -s 0 -c png -f -o - |
+ img2sixel -S -E size -q high -w $PREVIEW_WIDTH -o "$PREVIEW_DIR/$filename.six"
+ }
+ cat "$PREVIEW_DIR/$filename.six"
+ ;;
+application/*zip)
+ atool --list -- "$1"
+ ;;
+*opendocument*)
+ odt2txt "$1"
+ ;;
+application/pgp-encrypted)
+ gpg -d -- "$1"
+ ;;
esac
+
exit 1