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// influenced by https://bl.ocks.org/tomgp/c99a699587b5c5465228
function render_markup_for_server(callback) {
var virtual_window = MG.virtual_window;
var virtual_d3 = d3.select(virtual_window.document);
var target = virtual_window.document.createElement('div');
var original_d3 = global.d3;
var original_window = global.window;
var original_document = global.document;
global.d3 = virtual_d3;
global.window = virtual_window;
global.document = virtual_window.document;
var error;
try {
callback(target);
} catch(e) {
error = e;
}
global.d3 = original_d3;
global.window = original_window;
global.document = original_document;
if (error) {
throw error;
}
/* for some reason d3.select parses jsdom elements incorrectly
* but it works if we wrap the element in a function.
*/
return virtual_d3.select(function targetFn() {
return target;
}).html();
}
function render_markup_for_client(callback) {
var target = document.createElement('div');
callback(target);
return d3.select(target).html();
}
function render_markup(callback) {
switch(typeof window) {
case 'undefined':
return render_markup_for_server(callback);
default:
return render_markup_for_client(callback);
}
}
function init_virtual_window(jsdom, force) {
if (MG.virtual_window && !force) {
return;
}
var doc = jsdom.jsdom({
html: '',
features: { QuerySelector: true }
});
MG.virtual_window = doc.defaultView;
}
MG.render_markup = render_markup;
MG.init_virtual_window = init_virtual_window;
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