changes

src/export/epub.ts

@@ -1,6 +1,6 @@
 import type { JSONContent } from "@tiptap/core";
 import { invoke } from "@tauri-apps/api/core";
-import { type Book, TRIM_DIMS } from "../model/book";
+import { type Book, TRIM_DIMS, bodyNumber, chapterKind } from "../model/book";
 
 export interface EpubFile {
   path: string;
@@ -277,10 +277,10 @@ function contentOpf(
 
 function navXhtml(book: Book): string {
   const items = book.chapters
-    .map(
-      (chapter, i) =>
-        `      <li><a href="chapter-${i + 1}.xhtml">${esc(chapter.title || `Chapter ${i + 1}`)}</a></li>`,
-    )
+    .map((chapter, i) => {
+      const fallback = chapterKind(chapter) === "body" ? `Chapter ${bodyNumber(book.chapters, i)}` : "Untitled";
+      return `      <li><a href="chapter-${i + 1}.xhtml">${esc(chapter.title || fallback)}</a></li>`;
+    })
     .join("\n");
   return `<?xml version="1.0" encoding="UTF-8"?>
 <html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops" lang="${attr(book.metadata.language || "en")}">
@@ -301,16 +301,19 @@ ${items}
 
 function chapterXhtml(book: Book, index: number, paths: Map<string, string>): string {
   const chapter = book.chapters[index];
-  const title = chapter.title || `Chapter ${index + 1}`;
+  const kind = chapterKind(chapter);
+  const num = bodyNumber(book.chapters, index);
+  const title = chapter.title || (kind === "body" ? `Chapter ${num}` : "Untitled");
+  const eyebrow = kind === "body" ? `<p class="eyebrow">Chapter ${num}</p>` : "";
   return `<?xml version="1.0" encoding="UTF-8"?>
 <html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops" lang="${attr(book.metadata.language || "en")}">
   <head>
     <title>${esc(title)}</title>
     <link rel="stylesheet" type="text/css" href="style.css"/>
   </head>
-  <body epub:type="chapter">
+  <body epub:type="${kind === "body" ? "chapter" : kind === "front" ? "frontmatter" : "backmatter"}">
     <header class="chapter-opener">
-      <p class="eyebrow">Chapter ${index + 1}</p>
+      ${eyebrow}
       <h1>${esc(title)}</h1>
     </header>
     ${chapterBody(chapter.content, paths)}

src/export/typst.ts

@@ -1,5 +1,5 @@
 import type { JSONContent } from "@tiptap/core";
-import type { Book, TrimSize } from "../model/book";
+import { type Book, type TrimSize, bodyNumber, chapterKind } from "../model/book";
 import type { ImageInput } from "../ipc";
 
 const TRIM: Record<TrimSize, { w: string; h: string }> = {
@@ -136,6 +136,15 @@ function preamble(book: Book): string {
     #heading(level: 1, numbering: none, outlined: true)[#title]
   ]
   v(1.5em)
+}
+
+#let pageopener(title) = {
+  pagebreak(weak: true)
+  v(2.1in)
+  align(center)[
+    #heading(level: 1, numbering: none, outlined: true)[#title]
+  ]
+  v(1.5em)
 }`;
 }
 
@@ -216,7 +225,10 @@ export function bookToTypst(book: Book, paths: Map<string, string> = new Map(),
 
   const body = book.chapters
     .map((chapter, i) => {
-      const opener = `#chapteropener(${str(String(i + 1))}, [${esc(chapter.title || "Untitled")}])`;
+      const opener =
+        chapterKind(chapter) === "body"
+          ? `#chapteropener(${str(String(bodyNumber(book.chapters, i)))}, [${esc(chapter.title || "Untitled")}])`
+          : `#pageopener([${esc(chapter.title || "Untitled")}])`;
       return `${opener}\n\n${chapterBody(chapter.content, paths)}`;
     })
     .join("\n\n");
@@ -238,7 +250,10 @@ export function coverToPdfInputs(book: Book): { source: string; images: ImageInp
 
 function chapterToTypst(book: Book, index: number, paths: Map<string, string>): string {
   const chapter = book.chapters[index];
-  const opener = `#chapteropener(${str(String(index + 1))}, [${esc(chapter.title || "Untitled")}])`;
+  const opener =
+    chapterKind(chapter) === "body"
+      ? `#chapteropener(${str(String(bodyNumber(book.chapters, index)))}, [${esc(chapter.title || "Untitled")}])`
+      : `#pageopener([${esc(chapter.title || "Untitled")}])`;
   return `${preamble(book)}
 
 #set page(numbering: "1")