add widget vertex replace. bump rev 3.1.D0

src/moto/load-file.js

@@ -0,0 +1,60 @@
+'use strict';
+
+(function() {
+    if (!self.moto) self.moto = {};
+    if (self.moto.File) return;
+
+    function load_data(data, file, ext) {
+        ext = ext || name.toLowerCase().split('.').pop();
+        return new Promise((resolve, reject) => {
+            switch (ext) {
+                case "stl":
+                    resolve([{
+                        mesh: new moto.STL().parse(data), file
+                    }]);
+                    break;
+                case "obj":
+                    resolve(moto.OBJ.parse(data).map(m => { return {mesh: m.toFloat32(), file} }));
+                    break;
+                case "3mf":
+                    moto.TMF.parseAsync(data).then((meshes) => {
+                        resolve(meshes.map(m => {
+                            return { mesh: m.faces.toFloat32(), file }
+                        }));
+                    });
+                    break;
+                case "svg":
+                    resolve(moto.SVG.parse(data).map(m => { return {mesh: m.toFloat32(), file} }));
+                    break;
+                default:
+                    reject(`unknown file type: "${ext}" from ${url}`);
+                    break;
+            }
+        });
+    }
+
+    function load(file) {
+        return new Promise((resolve, reject) => {
+            let reader = new FileReader();
+            let name = file.name;
+            let ext = name.toLowerCase().split('.').pop();
+            reader.file = file;
+            reader.onloadend = function (event) {
+                load_data(event.target.result, name, ext)
+                    .then(data => resolve(data))
+                    .catch(e => reject(e));
+            };
+            if (ext === 'stl') {
+                reader.readAsArrayBuffer(reader.file);
+            } else {
+                reader.readAsBinaryString(reader.file);
+            }
+        });
+    }
+
+    self.moto.File = {
+        load_data,
+        load
+    };
+
+})();