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#!/usr/bin/env bash
readonly ID_PREVIEW="preview"
#PLAY_GIF="yes"
# By enabling this option the GIF will be animated, by leaving it commented like it
# is now will make the gif previews behave the same way as video previews.
#AUTO_REMOVE="yes"
# By enabling this option the script will remove the preview file after it is drawn
# and by doing so the preview will always be up-to-date with the file.
# This however, requires more CPU and therefore affects the overall performance.
# The messy code below is for moving pages in pdf files in the vifm file preview by
# utilizing the < and > keys which will be bound to `vifmimg inc` or `vifmimg dec`.
PDF_PAGE_CONFIG="$HOME/.config/vifm/vifmimgpdfpage"
PDF_FILE_CONFIG="$HOME/.config/vifm/vifmimgpdffile"
PDF_PAGE=1
PDF_FILE=""
# Initialize the variables and required files
[[ -f "$PDF_PAGE_CONFIG" ]] && PDF_PAGE=$(cat $PDF_PAGE_CONFIG) || touch $PDF_PAGE_CONFIG
[[ -f "$PDF_FILE_CONFIG" ]] && PDF_FILE=$(cat $PDF_FILE_CONFIG) || touch $PDF_FILE_CONFIG
# Create temporary working directory if the directory structure doesn't exist
if [[ ! -d "/tmp$PWD/" ]]; then
mkdir -p "/tmp$PWD/"
fi
function inc() {
VAL="$(cat $PDF_PAGE_CONFIG)"
echo "$(expr $VAL + 1)" > $PDF_PAGE_CONFIG
}
function dec() {
VAL="$(cat $PDF_PAGE_CONFIG)"
echo "$(expr $VAL - 1)" > $PDF_PAGE_CONFIG
if [[ $VAL -le 0 ]]; then
echo 0 > $PDF_PAGE_CONFIG
fi
}
function previewclear() {
declare -p -A cmd=([action]=remove [identifier]="$ID_PREVIEW") \
> "$FIFO_UEBERZUG"
}
function fileclean() {
if [[ -f "/tmp$PWD/$6.png" ]]; then
rm -f "/tmp$PWD/$6.png"
elif [[ -d "/tmp$PWD/$6/" ]]; then
rm -rf "/tmp$PWD/$6/"
fi
}
function preview() {
declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
[x]="$2" [y]="$3" [width]="$4" [height]="$5" \
[path]="$PWD/$6") \
> "$FIFO_UEBERZUG"
}
function previewvideo() {
if [[ ! -f "/tmp$PWD/$6.png" ]]; then
ffmpegthumbnailer -i "$PWD/$6" -o "/tmp$PWD/$6.png" -s 0 -q 10
fi
declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
[x]="$2" [y]="$3" [width]="$4" [height]="$5" \
[path]="/tmp$PWD/$6.png") \
> "$FIFO_UEBERZUG"
}
function previewepub() {
if [[ ! -f "/tmp$PWD/$6.png" ]]; then
epub-thumbnailer "$6" "/tmp$PWD/$6.png" 1024
fi
declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
[x]="$2" [y]="$3" [width]="$4" [height]="$5" \
[path]="/tmp$PWD/$6.png") \
> "$FIFO_UEBERZUG"
}
function previewgif() {
if [[ ! -d "/tmp$PWD/$6/" ]]; then
mkdir -p "/tmp$PWD/$6/"
convert -coalesce "$PWD/$6" "/tmp$PWD/$6/$6.png"
fi
if [[ ! -z "$PLAY_GIF" ]]; then
for frame in $(ls -1 /tmp$PWD/$6/$6*.png | sort -V); do
declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
[x]="$2" [y]="$3" [width]="$4" [height]="$5" \
[path]="$frame") \
> "$FIFO_UEBERZUG"
# Sleep between frames to make the animation smooth.
sleep .07
done
else
declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
[x]="$2" [y]="$3" [width]="$4" [height]="$5" \
[path]="/tmp$PWD/$6/$6-0.png") \
> "$FIFO_UEBERZUG"
fi
}
function previewpdf() {
if [[ ! "$6" == "$PDF_FILE" ]]; then
PDF_PAGE=1
echo 1 > $PDF_PAGE_CONFIG
rm -f "/tmp$PWD/$6.png"
fi
if [[ ! "$PDF_PAGE" == "1" ]] && [[ -f "/tmp$PWD/$6.png" ]]; then
rm -f "/tmp$PWD/$6.png"
fi
if [[ ! -f "/tmp$PWD/$6.png" ]]; then
pdftoppm -png -f $PDF_PAGE -singlefile "$6" "/tmp$PWD/$6"
fi
echo "$6" > $PDF_FILE_CONFIG
declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
[x]="$2" [y]="$3" [width]="$4" [height]="$5" \
[path]="/tmp$PWD/$6.png") \
> "$FIFO_UEBERZUG"
}
function previewmagick() {
if [[ ! -f "/tmp$PWD/$6.png" ]]; then
convert -thumbnail $(identify -format "%wx%h" "$6") "$PWD/$6" "/tmp$PWD/$6.png"
fi
declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
[x]="$2" [y]="$3" [width]="$4" [height]="$5" \
[path]="/tmp$PWD/$6.png") \
> "$FIFO_UEBERZUG"
}
function main() {
case "$1" in
"inc") inc "$@" ;;
"dec") dec "$@" ;;
"clear") previewclear "$@" ;;
"clean") fileclean "$@" ;;
"draw") preview "$@" ;;
"videopreview") previewvideo "$@" ;;
"epubpreview") previewepub "$@" ;;
"gifpreview") previewgif "$@" ;;
"pdfpreview") previewpdf "$@" ;;
"magickpreview") previewmagick "$@" ;;
"*") echo "Unknown command: '$@'" ;;
esac
}
main "$@"
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