Introduce some functional programming techniques

src/file/drawing/inline/graphic/graphic-data/graphic-data-attribute.ts

@@ -1,11 +1,11 @@
 import { XmlAttributeComponent } from "file/xml-components";
 
 export interface IGraphicDataAttributes {
-    uri?: string;
+    readonly uri?: string;
 }
 
 export class GraphicDataAttributes extends XmlAttributeComponent<IGraphicDataAttributes> {
-    protected xmlKeys = {
+    protected readonly xmlKeys = {
         uri: "uri",
     };
 }

src/file/drawing/inline/graphic/graphic-data/pic/blip/blip.ts

@@ -1,12 +1,12 @@
 import { XmlAttributeComponent, XmlComponent } from "file/xml-components";
 
 interface IBlipProperties {
-    embed: string;
-    cstate: string;
+    readonly embed: string;
+    readonly cstate: string;
 }
 
 class BlipAttributes extends XmlAttributeComponent<IBlipProperties> {
-    protected xmlKeys = {
+    protected readonly xmlKeys = {
         embed: "r:embed",
         cstate: "cstate",
     };

src/file/drawing/inline/graphic/graphic-data/pic/non-visual-pic-properties/child-non-visual-pic-properties/pic-locks/pic-locks-attributes.ts

@@ -1,12 +1,12 @@
 import { XmlAttributeComponent } from "file/xml-components";
 
 export interface IPicLocksAttributes {
-    noChangeAspect?: number;
-    noChangeArrowheads?: number;
+    readonly noChangeAspect?: number;
+    readonly noChangeArrowheads?: number;
 }
 
 export class PicLocksAttributes extends XmlAttributeComponent<IPicLocksAttributes> {
-    protected xmlKeys = {
+    protected readonly xmlKeys = {
         noChangeAspect: "noChangeAspect",
         noChangeArrowheads: "noChangeArrowheads",
     };

src/file/drawing/inline/graphic/graphic-data/pic/non-visual-pic-properties/non-visual-properties/non-visual-properties-attributes.ts

@@ -1,13 +1,13 @@
 import { XmlAttributeComponent } from "file/xml-components";
 
 export interface INonVisualPropertiesAttributes {
-    id?: number;
-    name?: string;
-    descr?: string;
+    readonly id?: number;
+    readonly name?: string;
+    readonly descr?: string;
 }
 
 export class NonVisualPropertiesAttributes extends XmlAttributeComponent<INonVisualPropertiesAttributes> {
-    protected xmlKeys = {
+    protected readonly xmlKeys = {
         id: "id",
         name: "name",
         descr: "desc",

src/file/drawing/inline/graphic/graphic-data/pic/pic-attributes.ts

@@ -1,11 +1,11 @@
 import { XmlAttributeComponent } from "file/xml-components";
 
 export interface IPicAttributes {
-    xmlns?: string;
+    readonly xmlns?: string;
 }
 
 export class PicAttributes extends XmlAttributeComponent<IPicAttributes> {
-    protected xmlKeys = {
+    protected readonly xmlKeys = {
         xmlns: "xmlns:pic",
     };
 }

src/file/drawing/inline/graphic/graphic-data/pic/shape-properties/form/extents/extents-attributes.ts

@@ -1,12 +1,12 @@
 import { XmlAttributeComponent } from "file/xml-components";
 
 export interface IExtentsAttributes {
-    cx?: number;
-    cy?: number;
+    readonly cx?: number;
+    readonly cy?: number;
 }
 
 export class ExtentsAttributes extends XmlAttributeComponent<IExtentsAttributes> {
-    protected xmlKeys = {
+    protected readonly xmlKeys = {
         cx: "cx",
         cy: "cy",
     };

src/file/drawing/inline/graphic/graphic-data/pic/shape-properties/form/offset/off-attributes.ts

@@ -1,12 +1,12 @@
 import { XmlAttributeComponent } from "file/xml-components";
 
 export interface IOffsetAttributes {
-    x?: number;
-    y?: number;
+    readonly x?: number;
+    readonly y?: number;
 }
 
 export class OffsetAttributes extends XmlAttributeComponent<IOffsetAttributes> {
-    protected xmlKeys = {
+    protected readonly xmlKeys = {
         x: "x",
         y: "y",
     };

src/file/drawing/inline/graphic/graphic-data/pic/shape-properties/preset-geometry/preset-geometry-attributes.ts

@@ -1,11 +1,11 @@
 import { XmlAttributeComponent } from "file/xml-components";
 
 export interface IPresetGeometryAttributes {
-    prst?: string;
+    readonly prst?: string;
 }
 
 export class PresetGeometryAttributes extends XmlAttributeComponent<IPresetGeometryAttributes> {
-    protected xmlKeys = {
+    protected readonly xmlKeys = {
         prst: "prst",
     };
 }

src/file/drawing/inline/graphic/graphic-data/pic/shape-properties/shape-properties-attributes.ts

@@ -1,11 +1,11 @@
 import { XmlAttributeComponent } from "file/xml-components";
 
 export interface IShapePropertiesAttributes {
-    bwMode?: string;
+    readonly bwMode?: string;
 }
 
 export class ShapePropertiesAttributes extends XmlAttributeComponent<IShapePropertiesAttributes> {
-    protected xmlKeys = {
+    protected readonly xmlKeys = {
         bwMode: "bwMode",
     };
 }

src/file/drawing/inline/graphic/graphic.ts

@@ -2,11 +2,11 @@ import { XmlAttributeComponent, XmlComponent } from "file/xml-components";
 import { GraphicData } from "./graphic-data";
 
 interface IGraphicProperties {
-    a: string;
+    readonly a: string;
 }
 
 class GraphicAttributes extends XmlAttributeComponent<IGraphicProperties> {
-    protected xmlKeys = {
+    protected readonly xmlKeys = {
         a: "xmlns:a",
     };
 }

src/file/drawing/inline/inline-attributes.ts

@@ -5,7 +5,7 @@ import { IDistance } from "../drawing";
 export interface IInlineAttributes extends IDistance {}
 
 export class InlineAttributes extends XmlAttributeComponent<IInlineAttributes> {
-    protected xmlKeys = {
+    protected readonly xmlKeys = {
         distT: "distT",
         distB: "distB",
         distL: "distL",