add support for floating drawings

- added need elements and test for them

src/file/drawing/drawing.ts

@@ -1,15 +1,49 @@
 import { IMediaData } from "file/media";
 import { XmlComponent } from "file/xml-components";
 import { Inline } from "./inline";
+import { Anchor } from "./anchor";
+import { TextWrapping } from "./text-wrap";
+import { Floating } from "./floating";
+
+export enum PlacementPosition {
+    INLINE,
+    FLOATING,
+}
+
+export interface Distance {
+    distT?: number;
+    distB?: number;
+    distL?: number;
+    distR?: number;
+}
+
+export interface DrawingOptions {
+    position?: PlacementPosition;
+    textWrapping?: TextWrapping;
+    floating?: Floating;
+}
+
+const defaultDrawingOptions: DrawingOptions = {
+    position: PlacementPosition.INLINE,
+};
 
 export class Drawing extends XmlComponent {
-    constructor(imageData: IMediaData) {
+    constructor(imageData: IMediaData, drawingOptions?: DrawingOptions) {
         super("w:drawing");
 
         if (imageData === undefined) {
             throw new Error("imageData cannot be undefined");
         }
 
-        this.root.push(new Inline(imageData.referenceId, imageData.dimensions));
+        const mergedOptions = {
+            ...defaultDrawingOptions,
+            ...drawingOptions,
+        };
+
+        if (mergedOptions.position === PlacementPosition.INLINE) {
+            this.root.push(new Inline(imageData.referenceId, imageData.dimensions));
+        } else if (mergedOptions.position === PlacementPosition.FLOATING) {
+            this.root.push(new Anchor(imageData.referenceId, imageData.dimensions, mergedOptions));
+        }
     }
 }