- Delete attribute(width and height), from root element (the tag name is svg) of SVG document. Then save it as tmp.svg. notice: This process is needed to calculate position and area size of drawing correctly.
- With inkscape command, get position (X and Y) and area size (W and H) of drawing from tmp.svg. To do this, execute command "inkscape -X tmp.svg", in the same way for Y, W and H. See "inkscape --help"
- Change viewBox attribute to "X Y W H". The root element has this attribute.
here is an example:
#!/bin/zsh
INKSCAPE=$(whence inkscape)
if [ -z "${INKSCAPE}" ]; then
echo "Command inkscape not found." > /dev/stderr
exit 1
fi
CSHARP=$(whence csharp)
if [ -z "${CSHARP}" ]; then
echo "Command csharp not found." > /dev/stderr
exit 1
fi
ID=
INPUT=
while [ -n "$1" ]; do
case $1 in
-I)
ID="$2"
shift
;;
*)
INPUT="$1"
;;
esac
shift
done
if [ -z "${INPUT}" ]; then
echo "No input file." > /dev/stderr
exit 1
fi
if [ ! -f "${INPUT}" ]; then
echo "File '${INPUT}' is not found." > /dev/stderr
exit 1
fi
OPTS=()
if [ -n "${ID}" ]; then
OPTS=(${OPTS} -I ${ID})
fi
TMPFILE=$(tempfile).svg
cat <<EOT | ${CSHARP} -reference:System.Xml.Linq > ${TMPFILE}
using System;
using System.Xml.Linq;
var doc = XDocument.Load(@"${INPUT}");
var width = doc.Root.Attribute(XName.Get("width"));
if (width != null) width.Remove();
var height = doc.Root.Attribute(XName.Get("height"));
if (height != null) height.Remove();
doc.Save(Console.Out);
EOT
X=$(${INKSCAPE} ${OPTS} -X ${TMPFILE})
Y=$(${INKSCAPE} ${OPTS} -Y ${TMPFILE})
W=$(${INKSCAPE} ${OPTS} -W ${TMPFILE})
H=$(${INKSCAPE} ${OPTS} -H ${TMPFILE})
cat <<EOT | ${CSHARP} -reference:System.Xml.Linq
using System;
using System.Xml.Linq;
var doc = XDocument.Load(@"${TMPFILE}");
var viewBoxValue = @"${X} ${Y} ${W} ${H}";
var viewBox = doc.Root.Attribute(XName.Get("viewBox"));
if (viewBox == null) doc.Root.Add(new XAttribute(XName.Get("viewBox"), viewBoxValue));
if (viewBox != null) viewBox.SetValue(viewBoxValue);
doc.Save(Console.Out);
EOT
