source "$DOROTHY/sources/bash.bash"

local formats=(

png

pdf

svg

eps

ps

)

# =====================================

# Arguments

function help {

cat <<-EOF >/dev/stderr

ABOUT:

Convert SVGs into PNGs.

USAGE:

svg-export [...options] -- ...<input>

OPTIONS:

--dpi=<dpi>

Set the display pixels per inch, e.g. [150].

--scale=<scale>

Set the scale factor, e.g. [2] for 2x.

--background=<background-color>

Set the background color, defaults to [white].

To keep transparency, use [--background=].

--format=$(

echo-join '|' -- "${formats[@]}"

)]

EXAMPLE:

svg-export -- *.svg

EOF

if [[ $# -ne 0 ]]; then

echo-error "$@"

fi

return 22 # EINVAL 22 Invalid argument

}

# process

local item files=() dpi='' scale='' background='white' format=''

while [[ $# -ne 0 ]]; do

item="$1"

shift

case "$item" in

'--help' | '-h') help ;;

'--dpi='*) dpi="${item#*=}" ;;

'--scale='*) scale="${item#*=}" ;;

'--background='* | '--bg='*) background="${item#*=}" ;;

'--format='*) format="${item#*=}" ;;

'--')

files+=("$@")

shift $#

break

;;

'--'*) help "An unrecognised flag was provided: $item" ;;

*) help "An unrecognised argument was provided: $item" ;;

esac

done

# if no files, fail

if [[ ${#files[@]} -eq 0 ]]; then

help 'No <input>s provided.'

fi

# ensure correct format

format="$(

choose --required \

--question='Which format to export to?' \

--default="$format" -- "${formats[@]}"

)"

# =====================================

# Dependencies

# https://github.com/sharkdp/bat

# cat alternative

setup-util --quiet --cli='cairosvg' \

PIP='cairosvg'

# =====================================

# Act

# adjustments

local suffix='' args=(

--format "$format"

)

if [[ -n $scale ]]; then

suffix+=" [scale=$scale]"

args+=(--scale "$scale")

fi

if [[ -n $dpi ]]; then

suffix+=" [dpi=$dpi]"

args+=(--dpi "$dpi")

fi

if [[ -n $background ]]; then

suffix+=" [bg=$background]"

args+=(--background "$background")

fi

suffix+=".$format"

# convert

local input output prefix

for input in "${files[@]}"; do

prefix="$(fs-filename -- "$input")"

output="${prefix}${suffix}"

eval-helper --quiet \

--pending="$(echo-style --bold="Converting " --code="$input" --bold=" to " --code="$output")" \

--success="$(echo-style --bold+green="Converted " --code="$input" --bold=" to " --code="$output")" \

--failure="$(echo-style --bold+red="Failed to convert " --code="$input" --bold=" to " --code="$output")" \

-- cairosvg "${args[@]}" --output "$output" "$input" || :

# svg2png doesn't work well

# https://github.com/domenic/svg2png

# svg2png --scale="$scale" "$input" "$output"

done