wynnbuilder-forked-for-changes/js/d3_export.js

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2022-06-25 12:23:58 +00:00
// http://bl.ocks.org/rokotyan/0556f8facbaf344507cdc45dc3622177
// Set-up the export button
function set_export_button(svg, button_id, output_id) {
d3.select('#'+button_id).on('click', function(){
//get svg source.
var serializer = new XMLSerializer();
var source = serializer.serializeToString(svg.node());
console.log(source);
source = source.replace(/^<g/, '<svg');
source = source.replace(/<\/g>$/, '</svg>');
//add name spaces.
if(!source.match(/^<svg[^>]+xmlns="http\:\/\/www\.w3\.org\/2000\/svg"/)){
source = source.replace(/^<svg/, '<svg xmlns="http://www.w3.org/2000/svg"');
}
if(!source.match(/^<svg[^>]+"http\:\/\/www\.w3\.org\/1999\/xlink"/)){
source = source.replace(/^<svg/, '<svg xmlns:xlink="http://www.w3.org/1999/xlink"');
}
//add xml declaration
source = '<?xml version="1.0" standalone="no"?>\r\n' + source;
//convert svg source to URI data scheme.
var url = "data:image/svg+xml;charset=utf-8,"+encodeURIComponent(source);
//set url value to a element's href attribute.
document.getElementById(output_id).href = url;
});
}