scan-dialog/scan-dialog

#!/bin/env bash

export GDK_BACKEND=x11
export SANE_DEFAULT_DEVICE='epsonds:libusb:001:006' # Specify device to avoid startup delays and scanning slowness.

function check_filename {
  path=$1
  folder=$(dirname "$path")
  file=$(basename "$path")
  extension="${file##*.}"
  filename="${file%.*}"

  if [[ -e "$path" ]]; then
    i=2
    while [[ -e "$folder/$filename-$i.$extension" ]]; do
      let i++
    done
    filename=$filename-$i
  fi
  echo "$folder/$filename.$extension"
}
export -f check_filename # Make available to run_scan's command substitution

# positional arguments: 1-folder 2-prefix 3-format 4-papersize 5-resolution 6-colormode
function run_scan {

  # Paper size.
  case $4 in
  A4)
    x=210
    y=297
    ;;
  A5)
    x=148
    y=210
    ;;
  A5R)
    x=210 # currently removed A5R because sane epson backend throws an out of memory error.
    y=148
    ;;
  esac

  filename=$(check_filename $1/$2.$3)

  echo "$6 $5 $x $y $filename"

  tempname="./temp-$(date +%s).png"
  scanimage --mode=$6 --resolution=$5 -x $x -y $y --format=png --output-file=$tempname | \
  yad --progress --text="Scanning to PNG..." --width=300 --no-buttons --auto-close

  case $3 in
    png)
      mv $tempname $filename
      ;;
    jpg)
      convert -quality 85 $tempname $filename | \
      yad --progress --text="Converting to $3..." --width=300 --no-buttons --auto-close
      rm $tempname
      ;;
    pdf)
      if [[ $6 != "Lineart" ]] then
        tempname2="${tempname%.png}.jpg"
        convert -quality 85 $tempname $tempname2 | \
        yad --progress --text="Converting to jpg..." --width=300 --no-buttons --auto-close
        rm $tempname
        tempname=$tempname2
      fi
      convert $tempname $filename | \
      yad --progress --text="Converting to $3..." --width=300 --no-buttons --auto-close
      rm $tempname
      ;;
  esac
}
export -f run_scan # Make function available to yad button command.

# Display scan-dialog.
yad --form --orient=hor --maximized --width=750 --height=250 --columns=3 \
  --title="Scanning Options" \
  --field="Scan Folder:SFL" /mnt/public \
  --field="Filename Prefix:SFL" scan \
  --field="File format:CB" jpg\!png\!pdf \
  --field="Paper Size:CB" A4\!A5 \
  --field="Resolution (DPI):CB" 75\!^150\!300\!600\!1200 \
  --field="Scan Buttons:BTN" "" \
  --field="Colour:FBTN" 'bash -c "run_scan %1 %2 %3 %4 %5 Color"' \
  --field="Grayscale:FBTN" 'bash -c "run_scan %1 %2 %3 %4 %5 Gray"' \
  --field="B&W:FBTN" 'bash -c "run_scan %1 %2 %3 %4 %5 Lineart"' \
  --field="...:BTN" "" \
  --field="Presets:BTN" "" \
  --field="Art (Colour PNG):FBTN" 'bash -c "run_scan %1 art png %4 %5 Color"' \
  --field="Art (Colour JPG):FBTN" 'bash -c "run_scan %1 art jpg %4 %5 Color"' \
  --field="Doc (Gray PDF):FBTN" 'bash -c "run_scan %1 doc pdf %4 %5 Gray"' \
  --field="Doc (B&W PDF):FBTN" 'bash -c "run_scan %1 doc pdf %4 %5 Lineart"' \
  --no-buttons --buttons-layout=center