Add enum to lineRule and create demo

src/file/footnotes/footnotes.ts

@@ -1,6 +1,6 @@
 import { XmlComponent } from "file/xml-components";
 
-import { Paragraph } from "../paragraph";
+import { LineRuleType, Paragraph } from "../paragraph";
 import { Footnote, FootnoteType } from "./footnote/footnote";
 import { ContinuationSeperatorRun } from "./footnote/run/continuation-seperator-run";
 import { SeperatorRun } from "./footnote/run/seperator-run";
@@ -40,7 +40,7 @@ export class FootNotes extends XmlComponent {
                     spacing: {
                         after: 0,
                         line: 240,
-                        lineRule: "auto",
+                        lineRule: LineRuleType.AUTO,
                     },
                     children: [new SeperatorRun()],
                 }),
@@ -57,7 +57,7 @@ export class FootNotes extends XmlComponent {
                     spacing: {
                         after: 0,
                         line: 240,
-                        lineRule: "auto",
+                        lineRule: LineRuleType.AUTO,
                     },
                     children: [new ContinuationSeperatorRun()],
                 }),

src/file/paragraph/formatting/spacing.ts

@@ -1,11 +1,18 @@
 // http://officeopenxml.com/WPspacing.php
 import { Attributes, XmlAttributeComponent, XmlComponent } from "file/xml-components";
 
+export enum LineRuleType {
+    AT_LEAST = "atLeast",
+    EXACTLY = "exactly",
+    AUTO = "auto",
+}
 export interface ISpacingProperties {
     readonly after?: number;
     readonly before?: number;
     readonly line?: number;
-    readonly lineRule?: string;
+    readonly lineRule?: LineRuleType;
+    readonly beforeAutoSpacing?: boolean;
+    readonly afterAutoSpacing?: boolean;
 }
 
 class SpacingAttributes extends XmlAttributeComponent<ISpacingProperties> {

src/file/styles/style/default-styles.ts

@@ -1,5 +1,7 @@
 import { UnderlineType } from "file/paragraph/run/underline";
 
+import { LineRuleType } from "file/paragraph";
+
 import { IBaseCharacterStyleOptions, StyleForCharacter } from "./character-style";
 import { IBaseParagraphStyleOptions, IParagraphStyleOptions, StyleForParagraph } from "./paragraph-style";
 
@@ -121,7 +123,7 @@ export class FootnoteText extends StyleForParagraph {
                 spacing: {
                     after: 0,
                     line: 240,
-                    lineRule: "auto",
+                    lineRule: LineRuleType.AUTO,
                 },
             },
             run: {