chore(multitext): add superscript/subscript

Author: singerla

src/helper/modify-text-helper.ts

@@ -87,6 +87,12 @@ export default class ModifyTextHelper {
       if (style.isUnderlined !== undefined) {
         ModifyTextHelper.setUnderlined(style.isUnderlined)(element);
       }
+      if (style.isSuperscript !== undefined) {
+        ModifyTextHelper.setSuperscript(style.isSuperscript)(element);
+      }
+      if (style.isSubscript !== undefined) {
+        ModifyTextHelper.setSubscript(style.isSubscript)(element);
+      }
     };
 
   /**
@@ -137,6 +143,24 @@ export default class ModifyTextHelper {
       }
     };
 
+  /**
+   * Set superscript attribute on text
+   */
+  static setSuperscript =
+    (isSuperscript: boolean) =>
+      (element: XmlElement): void => {
+        ModifyXmlHelper.attribute('baseline', isSuperscript ? '30000' : '0')(element);
+      };
+
+  /**
+   * Set subscript attribute on text
+   */
+  static setSubscript =
+    (isSubscript: boolean) =>
+      (element: XmlElement): void => {
+        ModifyXmlHelper.attribute('baseline', isSubscript ? '-25000' : '0')(element);
+      };
+
   /**
    * Set bullet type (font and character) for bullet points
    */

src/types/modify-types.ts

@@ -46,12 +46,15 @@ export type Border = {
   weight?: number;
   color?: Color;
 };
+
 export type TextStyle = {
   size?: number;
   color?: Color;
   isBold?: boolean;
   isItalics?: boolean;
   isUnderlined?: boolean;
+  isSuperscript?: boolean;
+  isSubscript?: boolean;
 };
 
 export type ImageStyle = {