Возможность добавлять объекты в документ

src/models/Document.zig

@@ -26,3 +26,17 @@ pub fn addObject(self: *Document, template: Object) !void {
     const obj = try template.clone(self.allocator);
     try self.objects.append(self.allocator, obj);
 }
+
+pub fn addShape(self: *Document, parent: ?*Object, shape: Object.ShapeKind) !void {
+    const obj = switch (shape) {
+        .line => try Object.createLine(self.allocator),
+        .ellipse => try Object.createEllipse(self.allocator),
+        .broken => try Object.createBrokenLine(self.allocator),
+        .arc => return error.ArcNotImplemented,
+    };
+    if (parent) |p| {
+        try p.addChild(self.allocator, obj);
+    } else {
+        try self.addObject(obj);
+    }
+}