Preserve QPowerPoint paragraph breaks on import

src/io/powerPointOffice.test.ts

@@ -129,6 +129,28 @@ describe("powerPointOffice helpers", () => {
     expect(imported.slides[0].notes).toBe("Заметка докладчика");
   });
 
+  it("сохраняет переносы абзацев внутри текстового блока PPTX при импорте", async () => {
+    const zip = new JSZip();
+    zip.file(
+      "ppt/presentation.xml",
+      `<p:presentation xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"><p:sldIdLst><p:sldId id="256" r:id="rId1"/></p:sldIdLst></p:presentation>`
+    );
+    zip.file(
+      "ppt/_rels/presentation.xml.rels",
+      `<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide" Target="slides/slide1.xml"/></Relationships>`
+    );
+    zip.file("ppt/slides/slide1.xml", slideXmlWithMultilineSubtitle("Roadmap", ["Plan", "Build", "Ship"]));
+
+    const blob = await zip.generateAsync({
+      type: "blob",
+      mimeType: "application/vnd.openxmlformats-officedocument.presentationml.presentation"
+    });
+    const imported = await importPptxFile(new File([blob], "Roadmap.pptx", { type: blob.type }));
+
+    expect(imported.slides[0].title).toBe("Roadmap");
+    expect(imported.slides[0].subtitle).toBe("Plan\nBuild\nShip");
+  });
+
   it("импортирует изображения слайда из PPTX media relationships", async () => {
     const zip = new JSZip();
     zip.file(
@@ -340,6 +362,12 @@ function slideXmlWithTextStyles(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 sz="3400"><a:solidFill><a:srgbClr val="C2410C"/></a:solidFill><a:latin typeface="Courier New"/></a:rPr><a:t>${title}</a:t></a:r></a:p></p:txBody></p:sp><p:sp><p:txBody><a:p><a:r><a:rPr sz="2200"><a:solidFill><a:srgbClr val="0F766E"/></a:solidFill><a:latin typeface="Times New Roman"/></a:rPr><a:t>${subtitle}</a:t></a:r></a:p></p:txBody></p:sp></p:spTree></p:cSld></p:sld>`;
 }
 
+function slideXmlWithMultilineSubtitle(title: string, subtitleParagraphs: 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:t>${title}</a:t></a:r></a:p></p:txBody></p:sp><p:sp><p:txBody>${subtitleParagraphs
+    .map((text) => `<a:p><a:r><a:t>${text}</a:t></a:r></a:p>`)
+    .join("")}</p:txBody></p:sp></p:spTree></p:cSld></p:sld>`;
+}
+
 function slideXmlWithPicture(title: string) {
   return `<p:sld xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main" xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"><p:cSld><p:spTree><p:sp><p:txBody><a:p><a:r><a:t>${title}</a:t></a:r></a:p></p:txBody></p:sp><p:pic><p:nvPicPr><p:cNvPr id="4" name="Picture 1" descr="Логотип"/></p:nvPicPr><p:blipFill><a:blip r:embed="rIdImage"/></p:blipFill><p:spPr><a:xfrm><a:off x="914400" y="1828800"/><a:ext cx="2743200" cy="1371600"/></a:xfrm></p:spPr></p:pic></p:spTree></p:cSld></p:sld>`;
 }

src/io/powerPointOffice.ts

@@ -178,7 +178,7 @@ function extractSlideTextBlocks(slideXml: unknown): SlideTextBlock[] {
   const textBodies = recordsByKey(slideXml, "txBody");
   const blocks = textBodies
     .map((textBody) => {
-      const text = normalizeWhitespace(extractTextBlocks(textBody).join("\n"));
+      const text = extractTextBodyText(textBody);
       if (!text) {
         return null;
       }
@@ -199,6 +199,14 @@ function extractSlideTextBlocks(slideXml: unknown): SlideTextBlock[] {
   return blocks.length > 0 ? blocks : extractTextBlocks(slideXml).map((text) => ({ text }));
 }
 
+function extractTextBodyText(textBody: Record<string, unknown>) {
+  const paragraphs = toArray(textBody.p)
+    .map((paragraph) => normalizeWhitespace(extractTextBlocks(paragraph).join("")))
+    .filter(Boolean);
+
+  return paragraphs.length > 0 ? paragraphs.join("\n") : normalizeWhitespace(extractTextBlocks(textBody).join("\n"));
+}
+
 export function listSlidePaths(
   zip: ZipArchive,
   presentationXml?: unknown,