Node x3d support

package.json

@@ -40,7 +40,8 @@
     "openscad-openjscad-translator": "0.0.7",
     "sax": "^1.2.1",
     "underscore": "^1.8.3",
-    "webworkify": "^1.4.0"
+    "webworkify": "^1.4.0",
+    "xmldom": "^0.1.27"
   },
   "devDependencies": {
     "ava": "^0.15.2",

src/io/writers/CSGToX3D.js

@@ -1,7 +1,12 @@
 import makeBlob from '../../utils/Blob'
 const Blob = makeBlob()
 
+import xmldom from 'xmldom'
+const XMLSerializer = xmldom.XMLSerializer
+// NOTE: might be useful :https://github.com/jindw/xmldom/pull/152/commits/be5176ece6fa1591daef96a5f361aaacaa445175
+
 export default function toX3D (CSG) {
+  const DOMImplementation = typeof document !== 'undefined' ? document.implementation : new xmldom.DOMImplementation()
   // materialPolygonLists
   // key: a color string (e.g. "0 1 1" for yellow)
   // value: an array of strings specifying polygons of this color
@@ -48,9 +53,9 @@ export default function toX3D (CSG) {
   })
 
   // create output document
-  var docType = document.implementation.createDocumentType('X3D',
+  var docType = DOMImplementation.createDocumentType('X3D',
     'ISO//Web3D//DTD X3D 3.1//EN', 'http://www.web3d.org/specifications/x3d-3.1.dtd')
-  var exportDoc = document.implementation.createDocument(null, 'X3D', docType)
+  var exportDoc = DOMImplementation.createDocument(null, 'X3D', docType)
   exportDoc.insertBefore(
     exportDoc.createProcessingInstruction('xml', 'version="1.0" encoding="UTF-8"'),
     exportDoc.doctype)

src/module.test.js

@@ -198,3 +198,19 @@ test('generateOutput(amf)', t => {
       t.is(size, 385246)// FIXME: verify: original value was 385255
     })
 })
+
+test('generateOutput(x3d)', t => {
+  const {generateOutput} = openjscad
+  // FIXME : create a fake csgObject rather than using output from another function
+  const inputPath = path.resolve(__dirname, '../examples/logo.jscad')
+  const script = fs.readFileSync(inputPath, 'UTF8')
+
+  return openjscad.compile(script, {})
+    .then(function (input) {
+      const output = generateOutput('x3d', input)
+      const {type, encoding, size} = output // FIXME for some reason this fails ?t.is(output.encoding, 'foo' when falsy)
+      t.is(type, 'model/x3d+xml')
+      t.is(encoding, 'utf8')
+      t.is(size, 44384)
+    })
+})