Preserve QPowerPoint strikethrough in PPTX

src/io/powerPointOffice.test.ts

@@ -614,9 +614,11 @@ describe("powerPointOffice helpers", () => {
       titleBold: true,
       titleItalics: true,
       titleUnderline: true,
+      titleStrike: true,
       subtitleBold: true,
       subtitleItalics: true,
-      subtitleUnderline: true
+      subtitleUnderline: true,
+      subtitleStrike: true
     });
 
     const exportedBlob = await exportPptxBlob({
@@ -631,9 +633,11 @@ describe("powerPointOffice helpers", () => {
           titleBold: false,
           titleItalics: true,
           titleUnderline: true,
+          titleStrike: true,
           subtitleBold: true,
           subtitleItalics: true,
-          subtitleUnderline: true
+          subtitleUnderline: true,
+          subtitleStrike: true
         }
       ]
     });
@@ -642,6 +646,7 @@ describe("powerPointOffice helpers", () => {
 
     expect(exportedSlideXml).toContain('i="1"');
     expect(exportedSlideXml).toContain('u="sng"');
+    expect(exportedSlideXml).toContain('strike="sngStrike"');
     expect(exportedSlideXml).toContain('b="1"');
 
     const reimported = await importPptxFile(new File([exportedBlob], "Начертание.pptx", { type: exportedBlob.type }));
@@ -649,9 +654,11 @@ describe("powerPointOffice helpers", () => {
       titleBold: false,
       titleItalics: true,
       titleUnderline: true,
+      titleStrike: true,
       subtitleBold: true,
       subtitleItalics: true,
-      subtitleUnderline: true
+      subtitleUnderline: true,
+      subtitleStrike: true
     });
   });
 
@@ -743,7 +750,7 @@ function slideXmlWithTextStyles(title: string, subtitle: string) {
 }
 
 function slideXmlWithTextRunStyles(title: string, subtitle: string) {
-  return `<p:sld xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main" xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main"><p:cSld><p:spTree><p:sp><p:txBody><a:p><a:r><a:rPr b="1" i="1" u="sng"/><a:t>${title}</a:t></a:r></a:p></p:txBody></p:sp><p:sp><p:txBody><a:p><a:r><a:rPr b="1" i="1" u="sng"/><a:t>${subtitle}</a:t></a:r></a:p></p:txBody></p:sp></p:spTree></p:cSld></p:sld>`;
+  return `<p:sld xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main" xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main"><p:cSld><p:spTree><p:sp><p:txBody><a:p><a:r><a:rPr b="1" i="1" u="sng" strike="sngStrike"/><a:t>${title}</a:t></a:r></a:p></p:txBody></p:sp><p:sp><p:txBody><a:p><a:r><a:rPr b="1" i="1" u="sng" strike="sngStrike"/><a:t>${subtitle}</a:t></a:r></a:p></p:txBody></p:sp></p:spTree></p:cSld></p:sld>`;
 }
 
 function slideXmlWithTextHyperlinks(title: string, subtitle: string) {