Create CheckBox element and supporting child elements

src/file/checkbox/checkbox-symbol.ts

@@ -0,0 +1,29 @@
+// This represents element type CT_SdtCheckboxSymbol element
+// <xsd:complexType name="CT_SdtCheckboxSymbol">
+//   <xsd:attribute name="font" type="w:ST_String"/>
+//    <xsd:attribute name="val" type="w:ST_ShortHexNumber"/>
+// </xsd:complexType>
+
+import { XmlAttributeComponent, XmlComponent } from "@file/xml-components";
+import { shortHexNumber } from "@util/values";
+
+class CheckboxSymbolAttributes extends XmlAttributeComponent<{
+    readonly val?: string | number | boolean;
+    readonly symbolfont?: string;
+}> {
+    protected readonly xmlKeys = {
+        val: "w14:val",
+        symbolfont: "w14:font",
+    };
+}
+
+export class CheckBoxSymbolElement extends XmlComponent {
+    public constructor(name: string, val: string, font?: string) {
+        super(name);
+        if (font) {
+            this.root.push(new CheckboxSymbolAttributes({ val: shortHexNumber(val), symbolfont: font }));
+        } else {
+            this.root.push(new CheckboxSymbolAttributes({ val }));
+        }
+    }
+}