Preserve QWord strikethrough formatting

src/io/wordOffice.ts

@@ -10,6 +10,7 @@ export interface WordInlineRun {
   bold?: boolean;
   italics?: boolean;
   underline?: boolean;
+  strike?: boolean;
   href?: string;
   color?: string;
   highlightColor?: string;
@@ -353,6 +354,9 @@ function wordInlineRunToTextRunOption(run: WordInlineRun) {
   if (run.underline) {
     options.underline = {};
   }
+  if (run.strike) {
+    options.strike = true;
+  }
   if (run.color) {
     options.color = run.color;
   }
@@ -681,7 +685,8 @@ function docxRunToHtml(run: unknown) {
   const highlightColor = docxRunHighlightColor(properties);
   const fontSize = docxRunFontSize(properties);
   const fontFamily = docxRunFontFamily(properties);
-  const hasInlineColorOrHighlight = Boolean(color || highlightColor || fontSize || fontFamily);
+  const hasStrike = hasDocxBoolean(properties, "w:strike") || hasDocxBoolean(properties, "w:dstrike");
+  const hasInlineColorOrHighlight = Boolean(color || highlightColor || fontSize || fontFamily || hasStrike);
   let html = escapeHtml(text);
 
   if (!text) {
@@ -697,6 +702,9 @@ function docxRunToHtml(run: unknown) {
   if (hasDocxBoolean(properties, "w:u")) {
     html = `<u>${html}</u>`;
   }
+  if (hasStrike) {
+    html = `<s>${html}</s>`;
+  }
 
   const styles = [
     color ? `color: #${color};` : "",
@@ -870,6 +878,7 @@ function formatForElement(element: Element, inherited: InlineFormat): InlineForm
     bold: inherited.bold || tagName === "b" || tagName === "strong" || /font-weight\s*:\s*(bold|[6-9]00)\b/i.test(style),
     italics: inherited.italics || tagName === "i" || tagName === "em" || /font-style\s*:\s*italic\b/i.test(style),
     underline: inherited.underline || tagName === "u" || /text-decoration(?:-line)?\s*:[^;]*underline/i.test(style),
+    strike: inherited.strike || tagName === "s" || tagName === "strike" || tagName === "del" || /text-decoration(?:-line)?\s*:[^;]*line-through/i.test(style),
     ...(href ? { href } : {}),
     ...(color ? { color } : {}),
     ...(highlightColor ? { highlightColor } : {}),
@@ -910,6 +919,7 @@ function sameInlineFormat(first: InlineFormat, second: InlineFormat) {
     Boolean(first.bold) === Boolean(second.bold) &&
     Boolean(first.italics) === Boolean(second.italics) &&
     Boolean(first.underline) === Boolean(second.underline) &&
+    Boolean(first.strike) === Boolean(second.strike) &&
     (first.href ?? "") === (second.href ?? "") &&
     (first.color ?? "") === (second.color ?? "") &&
     (first.highlightColor ?? "") === (second.highlightColor ?? "") &&
@@ -923,6 +933,7 @@ function cleanInlineFormat(format: InlineFormat): InlineFormat {
     ...(format.bold ? { bold: true } : {}),
     ...(format.italics ? { italics: true } : {}),
     ...(format.underline ? { underline: true } : {}),
+    ...(format.strike ? { strike: true } : {}),
     ...(format.href ? { href: format.href } : {}),
     ...(format.color ? { color: format.color } : {}),
     ...(format.highlightColor ? { highlightColor: format.highlightColor } : {}),