# 斜めのコマ割りで組むアクションのページ

> 剣道の決勝が決まるページ。コマ割りに斜めの間白（40~55）を入れ、打突のコマは枠なしにし、描き文字のドンは日本語のまま訳を小さく添えます。

- HTML版: https://postext.dev/ja/cookbook/manga-action-slants
- レシピ No. 150 · コミックと漫画 · 難易度 2 (中級) · 出力: Canvas, PDF
- ジャンル: 漫画・コミック
- 必要なもの postext ≥ 1.21.0, postext-pdf ≥ 1.21.0 · テスト環境 1.21.0, postext-pdf 1.21.0 ／テスト日 2026-10-07
- ページ: [1](https://postext.dev/cookbook/manga-action-slants/ja/p01.webp?v=c2c343a7), [1](https://postext.dev/cookbook/manga-action-slants/ja/p02.webp?v=c2c343a7)
- PDF: https://postext.dev/cookbook/manga-action-slants/ja/manga-action-slants.pdf?v=c2c343a7
- Sandboxで開く: https://postext.dev/ja/sandbox#recipe=manga-action-slants&lang=ja (.postext: https://postext.dev/cookbook/manga-action-slants/ja/manga-action-slants.postext)
- 最終更新: 2026-10-07
- 他の言語: [en](https://postext.dev/en/cookbook/manga-action-slants.md), [es](https://postext.dev/es/cookbook/manga-action-slants.md), [ca](https://postext.dev/ca/cookbook/manga-action-slants.md), [pt](https://postext.dev/pt/cookbook/manga-action-slants.md), [zh](https://postext.dev/zh/cookbook/manga-action-slants.md), [ar](https://postext.dev/ar/cookbook/manga-action-slants.md)

## かんたんな説明

漫画の試合の1ページです。コマとコマの間を斜めにして動きに勢いを出し、打った瞬間の大きな音の文字は日本語のまま残して、翻訳版では小さな訳を横に付けます。

## できあがり

[右から左へ読むレシピ](https://postext.dev/ja/cookbook/manga-right-to-left.md)と同じ漫画から、剣道の決勝が決まるページを、日本語の原版と英語版の2つの版で並べます。段は4つで、体育館、面金越しの花の目、打ち合い、そして周りの反応です。3段目は傾いた間白で分けるので、相手の突きと花の返し技が互いにぶつかっていくように見えます。4段目は逆向きに傾けて、ページの勢いを落とします。花の打突のコマには枠がなく、その描き文字「ドン」は太いゴシックで、どの版でも日本語のまま残し、翻訳版ではその下に小さな訳を添えます。

**このレシピが答える問い:**

- アクションシーンでコマの間白を斜めにするには？
- 絵の上に擬音の描き文字を入れるには？

## 手短な答え

```js
// script.js, 行 44–62
// The page is split in content.<lang>.md: `* [40~55 | *]` runs the gutter of the third
// tier from 40 % at the top to 55 % at the bottom, so both panels lean into the strike,
// and `24 [58~64 | *]` tilts the last tier the other way. The panel that lands the blow
// is drawn with `border=none`: no frame, so its speed lines run straight to the gutter.
// ドン keeps its Japanese face in every edition (`font=` on the line);
// the translations add a small subtitle under it, the way licensed manga gloss a drawn
// sound effect instead of redrawing it.
const comics = (lang) => ({
  artDirection: 'rtl', // drawn for right-to-left reading: slants and order mirror with it
  mirrorArt: false,
  gutter: { horizontal: mm(4), vertical: mm(2.5) }, // a slanted gutter keeps its width
  panel: { borderWidth: pt(1.1), borderColor: col('ink'), background: col('paper') },
  lettering: {
    fontFamily: EDITIONS[lang].faces[0], color: col('ink'),
    fontSize: pt(['ja', 'zh'].includes(lang) ? 8.5 : 7.5),
    writingMode: lang === 'zh' ? 'vertical' : 'auto',
  },
  balloonStyles: balloons(),
});
```

## 材料

**学べること**

- [コマ割り](https://postext.dev/ja/docs/comics.md#ページの分割): split=は短い式でページをコマに割ります。/で段を縦に重ね、|でコマを横に並べ、大きさはパーセントで、30~40で斜めの間白を指定し、角かっこでコマをさらに割ります。
- [描き文字の擬音](https://postext.dev/ja/docs/comics.md#吹き出しのスタイル): sfxの行は吹き出しなしで絵の上に音を描きます。言語ごとの見出し書体（日本語はDela Gothic One、英語などはBangers）、白い縁取り、at=、rotate=、size=で位置、傾き、大きさを決めます。

**ほかに使うもの**

- [読む方向と漫画の順序](https://postext.dev/ja/docs/comics.md#読む方向)
- [中国語・日本語・韓国語のフォント](https://postext.dev/ja/docs/configuration.md#中国語日本語韓国語のフォント)
- [コマの絵とトリミング](https://postext.dev/ja/docs/comics.md#コマと絵)
- [コマの枠線と間白](https://postext.dev/ja/docs/comics.md#コマと絵)
- [他言語への写植し直し](https://postext.dev/ja/docs/comics.md#写植)
- [話者とアンカー](https://postext.dev/ja/docs/comics.md#話者とアンカー)
- [漫画のページ](https://postext.dev/ja/docs/comics.md#漫画のページ)
- [漫画の写植](https://postext.dev/ja/docs/comics.md#写植)
- [吹き出しのスタイル](https://postext.dev/ja/docs/comics.md#吹き出しのスタイル)
- [縦組み](https://postext.dev/ja/docs/configuration.md#縦組み)
- [右綴じの本](https://postext.dev/ja/docs/configuration.md#綴じ)
- [セマンティックカラーパレット](https://postext.dev/ja/docs/configuration.md#カラーパレット)
- [キャンバス上のページ](https://postext.dev/ja/docs/configuration.md#ページをビットマップに描画する)
- [PDFの書き出し](https://postext.dev/ja/docs/configuration.md#pdfの生成)
- [中国語の改行](https://postext.dev/ja/docs/configuration.md#東アジアの組版)
- [用紙の色](https://postext.dev/ja/docs/configuration.md#ページ)
- [PDFに埋め込むフォント](https://postext.dev/ja/docs/configuration.md#なぜフォントプロバイダーが必要か)
- [リソースとしての図と表](https://postext.dev/ja/docs/document-format.md#リソース)
- [上付きと下付き](https://postext.dev/ja/docs/document-format.md#インライン書式)

**設定の一覧**

- [`bodyText`](https://postext.dev/ja/docs/configuration.md#本文), [`colorPalette`](https://postext.dev/ja/docs/configuration.md#カラーパレット), [`comics`](https://postext.dev/ja/docs/comics.md#漫画のページ), [`footer`](https://postext.dev/ja/docs/configuration.md#柱とノンブル), [`header`](https://postext.dev/ja/docs/configuration.md#柱とノンブル), [`headings`](https://postext.dev/ja/docs/configuration.md#見出し), [`locale`](https://postext.dev/ja/docs/configuration.md#ハイフネーション), [`page`](https://postext.dev/ja/docs/configuration.md#ページ)

**API**

- [`buildDocument`](https://postext.dev/ja/docs/configuration.md#文書のビルド), [`clearMeasurementCache`](https://postext.dev/ja/docs/configuration.md#計測キャッシュ), [`decompressWoff2`](https://postext.dev/ja/docs/configuration.md#ブラウザー向けフォントプロバイダーfontsource--woff2), `loadVerticalAlternates`, [`registerResourceImage`](https://postext.dev/ja/docs/architecture.md#apiの概要), [`renderPageToCanvas`](https://postext.dev/ja/docs/configuration.md#ページをビットマップに描画する), [`renderToPdf`](https://postext.dev/ja/docs/configuration.md#pdfの生成)

**書体**

- Zen Antique (OFL-1.1), Dela Gothic One (OFL-1.1), Comic Neue (OFL-1.1), Bangers (OFL-1.1), Noto Sans SC (OFL-1.1), ZCOOL KuaiLe (OFL-1.1), Playpen Sans Arabic (OFL-1.1), Lalezar (OFL-1.1)

## 作り方

### 1 · 間白の傾きはコマ割りに書く

コードは前の[手短な答え](https://postext.dev/ja/cookbook/manga-action-slants.md#手短な答え)にあります。サイズを`40~55`と書くと、そのコマの奥の辺は上端で段の40 %、下端で55 %の位置を通ります。コマは凸多角形のままで、間白は傾きに直交する方向で同じ幅を保ちます。右から左へ読むときは傾きも順番と一緒に反転するので、最初のコマはやはり右のコマです。このページのコマ割りは`24 / 18 / * [40~55 | *] / 24 [58~64 | *]`です。まっすぐな2段で場面を整え、打突の段を傾け、最後の段を逆に傾けます（[コマ割り](https://postext.dev/ja/docs/comics.md#ページの分割)）。

### 2 · 叫びはトゲのフキダシ、描き文字は枠からはみ出させる

```js
// script.js, 行 66–74
const balloons = () => [
  { id: 'speech', fill: col('paper'), stroke: col('ink'), strokeWidth: pt(0.6), roundness: 2 },
  { id: 'shout', fill: col('paper'), stroke: col('ink'), burstPoints: 18, burstDepth: 0.3 },
  { id: 'thought', fill: col('paper'), stroke: col('ink') },
  { id: 'inner', fill: col('tone'), stroke: col('tone'), strokeWidth: pt(0), italic: false },
  { id: 'caption', fill: col('paper'), stroke: col('ink'), strokeWidth: pt(0.5) },
  // white-edged on the art
  { id: 'sfx', color: col('ink'), haloColor: col('paper'), halo: pt(2.2) },
];
```

ふたりの掛け声は叫びのフキダシで、トゲを18本にし、標準より深くしています。描き文字にはフキダシがなく、効果線の上でも読めるように2.2 ptの白フチを付けて絵の上に置きます。打突のコマは`::panel{art=strike border=none}`と書き、その「ドン」には`break`を付けるので、写植家が音を枠からはみ出させるのと同じように、傾いた間白を越えて隣のコマまで届きます（[描き文字](https://postext.dev/ja/docs/comics.md#吹き出しのスタイル)）。

### 3 · ドンは日本語のまま、訳を添える

```js
// script.js, 行 272–291
const SFX = /^sfx(\{[^}\n]*\})?[ \t]*[:：](.*)$/gm; // sound effects: the second face sets them
async function loadEdition(lang) {
  const text = TEXT[lang];
  const [face, sfx] = EDITIONS[lang].faces;
  const faces = { [face]: FONTS[face], [sfx]: FONTS[sfx] };
  const effects = [...text.matchAll(SFX)];
  for (const [, attrs = '', words] of effects) { // ドン keeps its face in every language
    const family = /font="([^"]+)"/.exec(attrs)?.[1];
    if (!family) continue;
    faces[family] = FONTS[family];
    await loadCjkFonts({ [family]: FONTS[family] }, words, { vertical: true });
  }
  if (['ja', 'zh'].includes(lang)) { // CJK: only the files that hold these characters
    const own = effects.filter(([, attrs = '']) => !attrs.includes('font=')).map((m) => m[2]);
    await loadCjkFonts({ [face]: FONTS[face] }, text.replace(SFX, ''), { vertical: true });
    await loadCjkFonts({ [sfx]: FONTS[sfx] }, own.join(''), { vertical: true });
  }
  if (lang === 'ar') await loadArabicFonts(faces, text);
  await loadComicFonts(faces, text); // the bold and italic the faces do not ship
}
```

漫画の描き文字は絵の一部です。翻訳版の多くはそれをそのまま残し、横に小さく訳を付けます。台本も同じで、どの版にも`sfx{… font="Dela Gothic One" break}: ドン`の行があります。横書きの版はこの行に`vertical`を付けて「ドン」を原作どおり縦に保ち、その下に小さな2つめの効果音、WHAMや¡ZAS!を加えます。行の中で書体を指定しているので、各版は自分の写植書体が何であっても、Dela Gothic Oneを「ドン」の文字だけで読み込みます。

### 4 · セーフエリアを斜めのコマに合わせる

```js
// script.js, 行 184–268
const ART = { // fractions of the picture: the same in every language
  final: {
    alt: t({ en: 'The kendo final in a packed gym: two fighters cross swords among three referees.',
      es: 'La final en un pabellón lleno: dos rivales cruzan las espadas entre tres árbitros.',
      ca: 'La final en un pavelló ple: dos rivals creuen les espases entre tres àrbitres.',
      pt: 'A final num ginásio lotado: dois lutadores cruzam as espadas entre três árbitros.',
      zh: '座无虚席的体育馆里的决赛：两名选手在三名裁判之间交剑。',
      ar: 'النهائي في صالة ممتلئة: متباريان يتقاطع سيفاهما بين ثلاثة حكّام.',
      ja: '満員の体育館での決勝。3人の審判の間で2人が剣先を交える。' }),
  safeArea: { x: 0.22, y: 0.44, width: 0.56, height: 0.46 },
  anchors: [{ id: 'hana', x: 0.31, y: 0.51, head: { x: 0.31, y: 0.49 },
    face: { x: 0.28, y: 0.45, width: 0.07, height: 0.1 } },
  { id: 'rival', x: 0.68, y: 0.51, head: { x: 0.68, y: 0.49 },
    face: { x: 0.65, y: 0.46, width: 0.06, height: 0.09 } },
  { id: 'shinpan', x: 0.575, y: 0.585, head: { x: 0.575, y: 0.56 },
    face: { x: 0.56, y: 0.54, width: 0.03, height: 0.06 } }] },
  eyes: {
    alt: t({ en: "Hana's eyes through the bars of her helmet grille.",
      es: 'Los ojos de Hana tras las barras de la rejilla del casco.',
      ca: 'Els ulls de la Hana darrere les barres de la reixa del casc.',
      pt: 'Os olhos de Hana atrás das barras da grade do capacete.',
      zh: '面罩铁栏后花的眼睛。',
      ar: 'عينا هانا خلف قضبان شبكة الخوذة.',
      ja: '面金の向こうの花の目。' }),
  safeArea: { x: 0.22, y: 0.26, width: 0.57, height: 0.38 },
  anchors: [{ id: 'hana', x: 0.5, y: 0.62, head: { x: 0.5, y: 0.4 },
    face: { x: 0.2, y: 0.3, width: 0.6, height: 0.3 } }] },
  lunge: {
    alt: t({ en: 'The opponent lunges at the viewer, speed lines all round.',
      es: 'El rival se lanza hacia el lector entre líneas cinéticas.',
      ca: 'El rival es llança cap al lector entre línies cinètiques.',
      pt: 'O adversário avança contra o leitor entre linhas de velocidade.',
      zh: '对手在速度线中朝读者猛刺过来。',
      ar: 'الخصم يندفع نحو القارئ وسط خطوط السرعة.',
      ja: '集中線の中、こちらへ突いてくる相手。' }),
  safeArea: { x: 0.03, y: 0.01, width: 0.8, height: 0.61 },
  avoid: [{ x: 0.02, y: 0.42, width: 0.23, height: 0.18 }],
  anchors: [{ id: 'rival', x: 0.7, y: 0.2, head: { x: 0.7, y: 0.14 },
    face: { x: 0.63, y: 0.02, width: 0.15, height: 0.24 } }] },
  strike: {
    alt: t({ en: "Hana leaps and strikes the top of the opponent's helmet; the sword bends.",
      es: 'Hana salta y golpea la parte alta del casco del rival; la espada se dobla.',
      ca: 'La Hana salta i colpeja la part alta del casc del rival; l’espasa es doblega.',
      pt: 'Hana salta e acerta o alto do capacete do adversário; a espada se curva.',
      zh: '花跃起击中对手面罩顶部，竹剑弯了起来。',
      ar: 'هانا تقفز وتضرب أعلى خوذة الخصم؛ ينثني السيف.',
      ja: '跳び込んで相手の面を打つ花。竹刀がしなる。' }),
  safeArea: { x: 0.36, y: 0.06, width: 0.42, height: 0.77 },
  avoid: [{ x: 0.52, y: 0.48, width: 0.13, height: 0.16 }],
  anchors: [{ id: 'hana', x: 0.43, y: 0.25, head: { x: 0.43, y: 0.18 },
    face: { x: 0.38, y: 0.07, width: 0.1, height: 0.25 } }, { id: 'sfx', x: 0.75, y: 0.25 }] },
  stands: {
    alt: t({ en: 'Sora jumps up in the stands, fists raised, shouting.',
      es: 'Sora salta en la grada con los puños en alto, gritando.',
      ca: 'En Sora salta a la graderia amb els punys enlaire, cridant.',
      pt: 'Sora pula na arquibancada de punhos erguidos, gritando.',
      zh: '空在看台上跳起来，举着拳头大喊。',
      ar: 'سورا يقفز في المدرّجات رافعًا قبضتيه وهو يصيح.',
      ja: '観客席で拳を突き上げて叫ぶ空。' }),
  safeArea: { x: 0.08, y: 0.07, width: 0.69, height: 0.44 },
  avoid: [{ x: 0.08, y: 0.06, width: 0.12, height: 0.1 },
    { x: 0.64, y: 0.35, width: 0.1, height: 0.12 }],
  anchors: [{ id: 'sora', x: 0.51, y: 0.44, head: { x: 0.5, y: 0.37 },
    face: { x: 0.4, y: 0.3, width: 0.22, height: 0.2 } }] },
  coach: {
    alt: t({ en: 'Mori, arms crossed and eyes closed; behind him the referees raise their flags.',
      es: 'Mori, de brazos cruzados y ojos cerrados; detrás, los árbitros alzan las banderas.',
      ca: 'En Mori, de braços plegats i ulls tancats; darrere, els àrbitres alcen les banderes.',
      pt: 'Mori, de braços cruzados e olhos fechados; atrás, os árbitros erguem as bandeiras.',
      zh: '森老师抱着双臂、闭着眼；身后的裁判举起了旗子。',
      ar: 'موري عاقد الذراعين مغمض العينين، وخلفه يرفع الحكّام راياتهم.',
      ja: '腕を組み目を閉じる森先生。後ろで審判が旗を上げる。' }),
  safeArea: { x: 0.16, y: 0.1, width: 0.76, height: 0.53 },
  avoid: [{ x: 0.55, y: 0.18, width: 0.4, height: 0.17 }],
  anchors: [{ id: 'mori', x: 0.29, y: 0.31, head: { x: 0.29, y: 0.2 },
    face: { x: 0.22, y: 0.1, width: 0.14, height: 0.24 } }] },
};
const panels = () => Promise.all([
  comicPanel('final', asset('match-final.jpg'), ART.final),
  comicPanel('eyes', asset('match-eyes.jpg'), ART.eyes),
  comicPanel('lunge', asset('match-lunge.jpg'), ART.lunge),
  comicPanel('strike', asset('match-strike.jpg'), ART.strike),
  comicPanel('coach', asset('match-coach.jpg'), ART.coach),
  comicPanel('stands', asset('match-stands.jpg'), ART.stands),
]);
```

斜めのコマは片方の端がもう片方より広く、絵はコマ全体を覆わなければなりません。セーフエリアはコマに要るものだけに切り詰めます。面金の大写しなら目、応援の場面なら空の上半身です。そうすればコマのいちばん広い切り抜きにも収まり、絵の周りに余白ができることはありません。

### 5 · 各版の向かいに原版を置く

```js
// script.js, 行 296–305
const FACING = LANG === 'ja' ? 'en' : LANG; // Japanese readers see the English edition
const TEXT = { ja: original, [FACING]: LANG === 'ja' ? english : markdown };
await loadFonts(FONTS, Object.values(TEXT).join('\n'));
const resources = await panels();
const build = async (lang) => { // the same pictures and page; this language's lettering
  await loadEdition(lang);
  return buildWithFonts(() => buildDocument({ markdown: TEXT[lang], resources,
    continuation: { pageIndexOffset: lang === 'ja' ? 1 : 2 } }, edition(lang)), TEXT[lang]);
};
const docs = [await build('ja'), await build(FACING)];
```

サイトの言語ごとにページを自分のファイルで写植し、見開きの反対側に日本語の原版を置きます（日本語のページでは英語版と向かい合わせ）。「ドン」はどの版にも残り、各版が自分の訳（WHAM、ZAS!、咚、بوم!）を添え、傾きは動きません。

## レシピの全体

レシピのフォルダーから合成した1つのファイルで、サンプルのテキストとレシピ集の共通キットを埋め込んであり、自分でページを組み立てます。動かすには、空のページの`<script type="module">`に入れるか、新しいCodePenのpenのJSパネルに貼り付けます（モジュールとして）。esm.shからpostextを読み込むので、インストールもビルドも要りません。

- レシピのフォルダー: https://github.com/drnachio/postext/tree/main/cookbook/manga-action-slants

### script.js

```js
// ═══ Postext Cookbook · Nº 150 · An action page with slanted gutters ═════════════════
// https://postext.dev/en/cookbook/manga-action-slants
// Code: MIT · Story: written for the recipe (CC BY 4.0) · Pictures: generated with diffusion models
// Fonts: Zen Antique, Comic Neue and six more (SIL OFL 1.1) · Needs postext ≥ 1.21.0
// The last page of a kendo final: slanted panels, a borderless strike, ドン kept in every edition.
import {
  buildDocument, renderPageToCanvas, clearMeasurementCache, registerResourceImage,
  loadVerticalAlternates,
} from 'https://esm.sh/postext';
import { renderToPdf, decompressWoff2 } from 'https://esm.sh/postext-pdf';

const LANG = 'ja'; // @lang: this edition's language; the Japanese original faces it
const RECIPE = 'manga-action-slants';

// ─── 1 · Design ─────────────────────────────────────────────────────────────
// #region palette: black ink on a warm white, one screen-tone grey
const palette = {
  ink: '#151413', // panel borders, balloon outlines, the lettering
  paper: '#fdfcf9', // the page and the balloons
  tone: '#e8e6e1', // the inner-voice box, a light screen tone
  muted: '#6f6b64',
  accent: '#a8322b', // the cover red (the Folio case in recipe.json)
};
const col = (id) => ({ hex: palette[id], model: 'hex', paletteId: id });
const colorPalette = [
  ...Object.entries(palette).map(([id, hex]) => ({ id, name: id, value: { hex, model: 'hex' } })),
  { id: 'main-color', name: 'ink (defaults)', value: { hex: palette.ink, model: 'hex' } },
];
// #endregion

// The engine's lettering and sound-effect faces per language (defaultComicFont and
// defaultComicSfxFont), written out so FONTS and the PDF know them.
const EDITIONS = {
  ja: { locale: 'ja', faces: ['Zen Antique', 'Dela Gothic One'] },
  en: { locale: 'en-us', faces: ['Comic Neue', 'Bangers'] },
  es: { locale: 'es', faces: ['Comic Neue', 'Bangers'] },
  ca: { locale: 'ca', faces: ['Comic Neue', 'Bangers'] },
  pt: { locale: 'pt-BR', faces: ['Comic Neue', 'Bangers'] },
  zh: { locale: 'zh-Hans', faces: ['Noto Sans SC', 'ZCOOL KuaiLe'] },
  ar: { locale: 'ar', faces: ['Playpen Sans Arabic', 'Lalezar'] },
};

// #region answer: the slant is in the split; the impact is in the panel and the effect
// The page is split in content.<lang>.md: `* [40~55 | *]` runs the gutter of the third
// tier from 40 % at the top to 55 % at the bottom, so both panels lean into the strike,
// and `24 [58~64 | *]` tilts the last tier the other way. The panel that lands the blow
// is drawn with `border=none`: no frame, so its speed lines run straight to the gutter.
// ドン keeps its Japanese face in every edition (`font=` on the line);
// the translations add a small subtitle under it, the way licensed manga gloss a drawn
// sound effect instead of redrawing it.
const comics = (lang) => ({
  artDirection: 'rtl', // drawn for right-to-left reading: slants and order mirror with it
  mirrorArt: false,
  gutter: { horizontal: mm(4), vertical: mm(2.5) }, // a slanted gutter keeps its width
  panel: { borderWidth: pt(1.1), borderColor: col('ink'), background: col('paper') },
  lettering: {
    fontFamily: EDITIONS[lang].faces[0], color: col('ink'),
    fontSize: pt(['ja', 'zh'].includes(lang) ? 8.5 : 7.5),
    writingMode: lang === 'zh' ? 'vertical' : 'auto',
  },
  balloonStyles: balloons(),
});
// #endregion

// #region balloons: oval speech, a spiky shout, a grey box for the inner voice
const balloons = () => [
  { id: 'speech', fill: col('paper'), stroke: col('ink'), strokeWidth: pt(0.6), roundness: 2 },
  { id: 'shout', fill: col('paper'), stroke: col('ink'), burstPoints: 18, burstDepth: 0.3 },
  { id: 'thought', fill: col('paper'), stroke: col('ink') },
  { id: 'inner', fill: col('tone'), stroke: col('tone'), strokeWidth: pt(0), italic: false },
  { id: 'caption', fill: col('paper'), stroke: col('ink'), strokeWidth: pt(0.5) },
  // white-edged on the art
  { id: 'sfx', color: col('ink'), haloColor: col('paper'), halo: pt(2.2) },
];
// #endregion

const config = () => ({ // a factory: the engine caches resolved configs per object
  // Each edition's language, written out (gotcha: ja-locale-tag); the original is built
  // with 'ja' in every edition (edition('ja') below).
  locale: t({ ja: 'ja', en: 'en-us', es: 'es', ca: 'ca', zh: 'zh-Hans', ar: 'ar', pt: 'pt-BR' }),
  colorPalette,
  page: {
    sizePreset: 'custom', width: mm(128), height: mm(182), dpi: 150, // B6, a tankōbon
    binding: 'right', backgroundColor: col('paper'), // manga open from the right, in any language
    margins: { top: mm(13), bottom: mm(15), left: mm(11), right: mm(11), mirror: true },
  },
  bodyText: {
    fontFamily: 'Zen Antique', fontSize: pt(9), lineHeight: pt(15), color: col('ink'),
    boldColor: col('ink'), italicColor: col('ink'), referenceColor: col('ink'),
  },
  headings: { fontFamily: 'Zen Antique', color: col('ink'),
    levels: [{ level: 1, breakBefore: { enabled: true, parity: 'any' } }] }, // the H1 break
  header: { elements: [] }, // comic pages are all panels: no running heads, no folios
  footer: { elements: [] },
  comics: comics(LANG),
});
// Another edition changes the language and the faces; the page and its slants stay.
const edition = (lang) => ({ ...config(), locale: EDITIONS[lang].locale, comics: comics(lang) });

// ─── 2 · Content ────────────────────────────────────────────────────────────
const markdown = String.raw`---
title: "決勝"
author: "Postext Cookbook"
---

:::page{split="24 / 18 / * [40~55 | *] / 24 [58~64 | *]"}
::panel{art=final}
caption: 決勝戦。
shinpan: 始め！
::panel{art=eyes}
hana{inner}: ……見える
::panel{art=lunge}
sfx{rotate=-12}: ダンッ
rival{shout}: メェェン！
::panel{art=strike border=none}
sfx{at="74% 26%" rotate=-8 size=2.6 font="Dela Gothic One" break}: ドン
hana{shout}: メン！！
::panel{art=coach}
shinpan{tail=top}: 面あり！
mori{thought}: ……ふん。悪くない
::panel{art=stands}
sora{shout break}: 決まったぁぁ！！
:::
`; // content.<lang>.md: this edition's lettering
const original = String.raw`---
title: "決勝"
author: "Postext Cookbook"
---

:::page{split="24 / 18 / * [40~55 | *] / 24 [58~64 | *]"}
::panel{art=final}
caption: 決勝戦。
shinpan: 始め！
::panel{art=eyes}
hana{inner}: ……見える
::panel{art=lunge}
sfx{rotate=-12}: ダンッ
rival{shout}: メェェン！
::panel{art=strike border=none}
sfx{at="74% 26%" rotate=-8 size=2.6 font="Dela Gothic One" break}: ドン
hana{shout}: メン！！
::panel{art=coach}
shinpan{tail=top}: 面あり！
mori{thought}: ……ふん。悪くない
::panel{art=stands}
sora{shout break}: 決まったぁぁ！！
:::
`; // content.ja.md, the original, in every edition
const english = String.raw`---
title: "The Final"
author: "Postext Cookbook"
---

:::page{split="24 / 18 / * [40~55 | *] / 24 [58~64 | *]"}
::panel{art=final}
caption: The final.
shinpan: Hajime!
::panel{art=eyes}
hana{inner}: …I can see it.
::panel{art=lunge}
sfx{rotate=-12}: STOMP
rival{shout}: MEEEN!
::panel{art=strike border=none}
sfx{at="74% 26%" rotate=-8 size=2.6 font="Dela Gothic One" vertical break}: ドン
sfx{at="64% 80%" rotate=-8 size=0.9}: WHAM
hana{shout}: MEN!!
::panel{art=coach}
shinpan{tail=top}: Men! Point!
mori{thought}: …Hmph. Not bad.
::panel{art=stands}
sora{shout}: She did it!!
:::
`; // the Japanese edition faces the original with it
// The same panels and speaker ids in every file; only the words change.

// ─── 3 · Fonts ──────────────────────────────────────────────────────────────
const FONTS = {
  'Zen Antique': ['400'], 'Dela Gothic One': ['400'], 'Comic Neue': ['400', '700', '400i', '700i'],
  Bangers: ['400'], 'Noto Sans SC': ['400', '700'], 'ZCOOL KuaiLe': ['400'],
  'Playpen Sans Arabic': ['400', '700'], Lalezar: ['400'],
};

// #region art: six panels drawn for the recipe, with each speaker's mouth, head and face marked
const ART = { // fractions of the picture: the same in every language
  final: {
    alt: t({ en: 'The kendo final in a packed gym: two fighters cross swords among three referees.',
      es: 'La final en un pabellón lleno: dos rivales cruzan las espadas entre tres árbitros.',
      ca: 'La final en un pavelló ple: dos rivals creuen les espases entre tres àrbitres.',
      pt: 'A final num ginásio lotado: dois lutadores cruzam as espadas entre três árbitros.',
      zh: '座无虚席的体育馆里的决赛：两名选手在三名裁判之间交剑。',
      ar: 'النهائي في صالة ممتلئة: متباريان يتقاطع سيفاهما بين ثلاثة حكّام.',
      ja: '満員の体育館での決勝。3人の審判の間で2人が剣先を交える。' }),
  safeArea: { x: 0.22, y: 0.44, width: 0.56, height: 0.46 },
  anchors: [{ id: 'hana', x: 0.31, y: 0.51, head: { x: 0.31, y: 0.49 },
    face: { x: 0.28, y: 0.45, width: 0.07, height: 0.1 } },
  { id: 'rival', x: 0.68, y: 0.51, head: { x: 0.68, y: 0.49 },
    face: { x: 0.65, y: 0.46, width: 0.06, height: 0.09 } },
  { id: 'shinpan', x: 0.575, y: 0.585, head: { x: 0.575, y: 0.56 },
    face: { x: 0.56, y: 0.54, width: 0.03, height: 0.06 } }] },
  eyes: {
    alt: t({ en: "Hana's eyes through the bars of her helmet grille.",
      es: 'Los ojos de Hana tras las barras de la rejilla del casco.',
      ca: 'Els ulls de la Hana darrere les barres de la reixa del casc.',
      pt: 'Os olhos de Hana atrás das barras da grade do capacete.',
      zh: '面罩铁栏后花的眼睛。',
      ar: 'عينا هانا خلف قضبان شبكة الخوذة.',
      ja: '面金の向こうの花の目。' }),
  safeArea: { x: 0.22, y: 0.26, width: 0.57, height: 0.38 },
  anchors: [{ id: 'hana', x: 0.5, y: 0.62, head: { x: 0.5, y: 0.4 },
    face: { x: 0.2, y: 0.3, width: 0.6, height: 0.3 } }] },
  lunge: {
    alt: t({ en: 'The opponent lunges at the viewer, speed lines all round.',
      es: 'El rival se lanza hacia el lector entre líneas cinéticas.',
      ca: 'El rival es llança cap al lector entre línies cinètiques.',
      pt: 'O adversário avança contra o leitor entre linhas de velocidade.',
      zh: '对手在速度线中朝读者猛刺过来。',
      ar: 'الخصم يندفع نحو القارئ وسط خطوط السرعة.',
      ja: '集中線の中、こちらへ突いてくる相手。' }),
  safeArea: { x: 0.03, y: 0.01, width: 0.8, height: 0.61 },
  avoid: [{ x: 0.02, y: 0.42, width: 0.23, height: 0.18 }],
  anchors: [{ id: 'rival', x: 0.7, y: 0.2, head: { x: 0.7, y: 0.14 },
    face: { x: 0.63, y: 0.02, width: 0.15, height: 0.24 } }] },
  strike: {
    alt: t({ en: "Hana leaps and strikes the top of the opponent's helmet; the sword bends.",
      es: 'Hana salta y golpea la parte alta del casco del rival; la espada se dobla.',
      ca: 'La Hana salta i colpeja la part alta del casc del rival; l’espasa es doblega.',
      pt: 'Hana salta e acerta o alto do capacete do adversário; a espada se curva.',
      zh: '花跃起击中对手面罩顶部，竹剑弯了起来。',
      ar: 'هانا تقفز وتضرب أعلى خوذة الخصم؛ ينثني السيف.',
      ja: '跳び込んで相手の面を打つ花。竹刀がしなる。' }),
  safeArea: { x: 0.36, y: 0.06, width: 0.42, height: 0.77 },
  avoid: [{ x: 0.52, y: 0.48, width: 0.13, height: 0.16 }],
  anchors: [{ id: 'hana', x: 0.43, y: 0.25, head: { x: 0.43, y: 0.18 },
    face: { x: 0.38, y: 0.07, width: 0.1, height: 0.25 } }, { id: 'sfx', x: 0.75, y: 0.25 }] },
  stands: {
    alt: t({ en: 'Sora jumps up in the stands, fists raised, shouting.',
      es: 'Sora salta en la grada con los puños en alto, gritando.',
      ca: 'En Sora salta a la graderia amb els punys enlaire, cridant.',
      pt: 'Sora pula na arquibancada de punhos erguidos, gritando.',
      zh: '空在看台上跳起来，举着拳头大喊。',
      ar: 'سورا يقفز في المدرّجات رافعًا قبضتيه وهو يصيح.',
      ja: '観客席で拳を突き上げて叫ぶ空。' }),
  safeArea: { x: 0.08, y: 0.07, width: 0.69, height: 0.44 },
  avoid: [{ x: 0.08, y: 0.06, width: 0.12, height: 0.1 },
    { x: 0.64, y: 0.35, width: 0.1, height: 0.12 }],
  anchors: [{ id: 'sora', x: 0.51, y: 0.44, head: { x: 0.5, y: 0.37 },
    face: { x: 0.4, y: 0.3, width: 0.22, height: 0.2 } }] },
  coach: {
    alt: t({ en: 'Mori, arms crossed and eyes closed; behind him the referees raise their flags.',
      es: 'Mori, de brazos cruzados y ojos cerrados; detrás, los árbitros alzan las banderas.',
      ca: 'En Mori, de braços plegats i ulls tancats; darrere, els àrbitres alcen les banderes.',
      pt: 'Mori, de braços cruzados e olhos fechados; atrás, os árbitros erguem as bandeiras.',
      zh: '森老师抱着双臂、闭着眼；身后的裁判举起了旗子。',
      ar: 'موري عاقد الذراعين مغمض العينين، وخلفه يرفع الحكّام راياتهم.',
      ja: '腕を組み目を閉じる森先生。後ろで審判が旗を上げる。' }),
  safeArea: { x: 0.16, y: 0.1, width: 0.76, height: 0.53 },
  avoid: [{ x: 0.55, y: 0.18, width: 0.4, height: 0.17 }],
  anchors: [{ id: 'mori', x: 0.29, y: 0.31, head: { x: 0.29, y: 0.2 },
    face: { x: 0.22, y: 0.1, width: 0.14, height: 0.24 } }] },
};
const panels = () => Promise.all([
  comicPanel('final', asset('match-final.jpg'), ART.final),
  comicPanel('eyes', asset('match-eyes.jpg'), ART.eyes),
  comicPanel('lunge', asset('match-lunge.jpg'), ART.lunge),
  comicPanel('strike', asset('match-strike.jpg'), ART.strike),
  comicPanel('coach', asset('match-coach.jpg'), ART.coach),
  comicPanel('stands', asset('match-stands.jpg'), ART.stands),
]);
// #endregion

// #region fonts: each edition loads its faces with the words they set
const SFX = /^sfx(\{[^}\n]*\})?[ \t]*[:：](.*)$/gm; // sound effects: the second face sets them
async function loadEdition(lang) {
  const text = TEXT[lang];
  const [face, sfx] = EDITIONS[lang].faces;
  const faces = { [face]: FONTS[face], [sfx]: FONTS[sfx] };
  const effects = [...text.matchAll(SFX)];
  for (const [, attrs = '', words] of effects) { // ドン keeps its face in every language
    const family = /font="([^"]+)"/.exec(attrs)?.[1];
    if (!family) continue;
    faces[family] = FONTS[family];
    await loadCjkFonts({ [family]: FONTS[family] }, words, { vertical: true });
  }
  if (['ja', 'zh'].includes(lang)) { // CJK: only the files that hold these characters
    const own = effects.filter(([, attrs = '']) => !attrs.includes('font=')).map((m) => m[2]);
    await loadCjkFonts({ [face]: FONTS[face] }, text.replace(SFX, ''), { vertical: true });
    await loadCjkFonts({ [sfx]: FONTS[sfx] }, own.join(''), { vertical: true });
  }
  if (lang === 'ar') await loadArabicFonts(faces, text);
  await loadComicFonts(faces, text); // the bold and italic the faces do not ship
}
// #endregion

// ─── 4 · Build & show ───────────────────────────────────────────────────────
// #region editions: the original on the right-hand page, this edition's lettering facing it
const FACING = LANG === 'ja' ? 'en' : LANG; // Japanese readers see the English edition
const TEXT = { ja: original, [FACING]: LANG === 'ja' ? english : markdown };
await loadFonts(FONTS, Object.values(TEXT).join('\n'));
const resources = await panels();
const build = async (lang) => { // the same pictures and page; this language's lettering
  await loadEdition(lang);
  return buildWithFonts(() => buildDocument({ markdown: TEXT[lang], resources,
    continuation: { pageIndexOffset: lang === 'ja' ? 1 : 2 } }, edition(lang)), TEXT[lang]);
};
const docs = [await build('ja'), await build(FACING)];
// #endregion
const TITLE = t({
  en: 'An action page with slanted gutters', es: 'Una página de acción con calles inclinadas',
  ca: 'Una pàgina d’acció amb carrers inclinats', zh: '斜向格间的动作页', ar: 'صفحة حركة بفواصل مائلة',
  pt: 'Uma página de ação com sarjetas inclinadas',
  ja: '斜めのコマ割りで組むアクションのページ' });
showBook(docs, { title: TITLE });
offerPdf(() => renderToPdf(docs, { fontProvider: comicPdfProvider, resourceBytes: imageBytes }),
  `${RECIPE}.pdf`);

// ─── Kit ── helpers shared by every Cookbook recipe · postext.dev/cookbook ─────

// ─── Kit · core v1 ── the same in every recipe · postext.dev/cookbook
function mm(value) { return { value, unit: 'mm' }; }
function pt(value) { return { value, unit: 'pt' }; }
function em(value) { return { value, unit: 'em' }; }
/** The sample language's string: t({ en: 'Figure', es: 'Figura' }). */
function t(strings) { return strings[LANG] ?? Object.values(strings)[0]; }
/** A file in this recipe's assets folder, served from the Postext repo by jsDelivr. */
function asset(file) { return `https://cdn.jsdelivr.net/gh/drnachio/postext@main/cookbook/${RECIPE}/assets/${file}`; }

// ─── Kit · fonts v2 ── the same in every recipe · postext.dev/cookbook
// Postext measures with the loaded faces and caches the widths: load every face
// before the first build, from Fontsource, the files the PDF embeds too.

/** faces = { 'Family Name': ['400', '400i', '700'] }. `text` is the sample:
 *  č ł † α χ also load latin-ext and greek files (kitSubsetsFor). With
 *  `optional`, a face Fontsource does not ship is skipped instead of failing.
 *  Resolves to the number of faces added. */
async function loadFonts(faces, text = '', { optional = false } = {}) {
  kitStatus('Loading fonts…');
  const ranges = {
    latin: 'U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,'
      + 'U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD',
    'latin-ext': 'U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,'
      + 'U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF',
    greek: 'U+0370-03FF',
  };
  const jobs = [];
  let added = 0;
  for (const [family, specs] of Object.entries(faces)) {
    const id = fontsourceId(family);
    const todo = [...new Set(specs)].map((spec) => [parseInt(spec, 10), spec.endsWith('i') ? 'italic' : 'normal'])
      .filter(([weight, style]) => !hasFace(family, weight, style)); // before any await
    const meta = optional || /[^\0-ÿ]/u.test(text) ? await fontsourceMeta(family) : null;
    const subsets = ['latin', ...kitSubsetsFor(text, meta)];
    for (const [weight, style] of todo) {
      if (optional && !(meta?.weights.includes(weight) && meta.styles.includes(style))) continue;
      for (const subset of subsets) {
        const url = `https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-${subset}-${weight}-${style}.woff2`;
        const face = new FontFace(family, `url(${url}) format('woff2')`,
          { weight: String(weight), style, unicodeRange: ranges[subset] });
        jobs.push(face.load().then((ready) => { document.fonts.add(ready); added++; }, () => {
          if (subset === 'latin' && !optional) throw new Error(`Fontsource has no ${family} ${weight} ${style}`);
        }));
      }
    }
  }
  await Promise.all(jobs).catch((error) => { kitFail(error); throw error; });
  return added;
}

/** Runs `build` and loads any face the pages use that FONTS missed (a regular
 *  one with a warning), then clears the measurement cache and builds again. */
async function buildWithFonts(build, text = '') {
  const tried = new Set();
  for (let round = 0; round < 3; round++) {
    kitStatus('Laying out…');
    await new Promise(requestAnimationFrame);          // let the status paint first
    const result = await Promise.resolve().then(build).catch((error) => { kitFail(error); throw error; });
    const wanted = { base: {}, variants: {} };
    for (const { font, base } of [result].flat().flatMap(fontStringsOf)) {
      const { family, weight, style } = parseFont(font);
      const key = `${family}|${weight}|${style}`;
      if (tried.has(key) || hasFace(family, weight, style)) continue;
      tried.add(key);
      (wanted[base ? 'base' : 'variants'][family] ??= []).push(`${weight}${style === 'italic' ? 'i' : ''}`);
    }
    if (Object.keys(wanted.base).length) {
      console.warn(`[cookbook] FONTS does not list ${JSON.stringify(wanted.base)}: loading them.`);
    }
    const added = await loadFonts(wanted.base, text) + await loadFonts(wanted.variants, text, { optional: true });
    if (added === 0) return result;
    clearMeasurementCache();
  }
  throw new Error('The fonts did not settle after three builds.');
}

/** Every font string of the layout; `base` marks a block's own face. */
function fontStringsOf(doc) {
  const found = new Map();
  const walk = (node) => {
    if (!node || typeof node !== 'object') return;
    if (Array.isArray(node)) { node.forEach(walk); return; }
    for (const [key, value] of Object.entries(node)) {
      if (typeof value === 'string' && /fontString$/i.test(key)) {
        found.set(value, found.get(value) || key === 'fontString');
      } else if (value && typeof value === 'object') walk(value);
    }
  };
  walk(doc.pages);
  walk(doc.blocks);
  return [...found].map(([font, base]) => ({ font, base }));
}

/** '700 37.5px Open Sans' / 'italic 400 13px "Source Serif 4"' → { family, weight, style }.
 *  A string with no weight ('95.8px Young Serif', from a design text) is 400. */
function parseFont(font) {
  const m = /^(?:(italic|oblique)\s+)?(?:small-caps\s+)?(?:(\d+|bold|normal)\s+)?[\d.]+px\s+(.+)$/.exec(font.trim());
  if (!m) throw new Error(`Unexpected font string: ${font}`);
  const weight = m[2] === 'bold' ? 700 : !m[2] || m[2] === 'normal' ? 400 : Number(m[2]);
  return { family: m[3].replace(/^["']|["']$/g, ''), weight, style: m[1] ? 'italic' : 'normal' };
}

/** A loaded FontFace covers this family, weight and style (fonts.check() would
 *  also say yes for families nobody declared). */
function hasFace(family, weight, style) {
  for (const face of document.fonts) {
    if (face.status !== 'loaded' || face.style !== style) continue;
    if (face.family.replace(/^["']|["']$/g, '') !== family) continue;
    const [low, high = low] = face.weight.split(' ').map(Number);
    if (weight >= low && weight <= high) return true;
  }
  return false;
}

/** The files beyond latin `text` needs that `meta`'s family ships. */
function kitSubsetsFor(text, meta) {
  return [[/[Ā-˿ᴀ-ᶿḀ-ỿ†ℓⱠ-Ɀ꜠-ꟿ]/u, 'latin-ext'], [/[Ͱ-Ͽ]/u, 'greek']]
    .filter(([re, x]) => re.test(text) && meta?.subsets?.includes(x)).map(([, x]) => x);
}

/** Fontsource's id for a family: 'Source Serif 4' → 'source-serif-4'. */
function fontsourceId(family) { return family.toLowerCase().replace(/\s+/g, '-'); }

/** The family's Fontsource metadata (weights, styles, subsets), or null. */
function fontsourceMeta(family) {
  fontsourceMeta.cache ??= new Map();
  const id = fontsourceId(family);
  if (!fontsourceMeta.cache.has(id)) {
    fontsourceMeta.cache.set(id, fetch(`https://api.fontsource.org/v1/fonts/${id}`)
      .then((res) => (res.ok ? res.json() : null), () => null));
  }
  return fontsourceMeta.cache.get(id);
}

// ─── Kit · viewer v1 ── the same in every recipe · postext.dev/cookbook
/** The pages as spreads on a dark desk, page 1 alone, then verso | recto,
 *  each painted when it scrolls near. */
function showPages(docs, { title, width = 460 } = {}) {
  const root = viewer(title);
  const pages = [docs].flat().flatMap((doc) =>
    doc.pages.map((page) => ({ doc, page, n: (doc.pageIndexOffset ?? 0) + page.index })));
  const spreads = [];
  let verso = null;
  for (const p of pages) {
    if (p.n % 2 === 1) { if (verso) spreads.push([verso, null]); verso = p; }
    else { spreads.push([verso, p]); verso = null; }
  }
  if (verso) spreads.push([verso, null]);
  const density = Math.min(window.devicePixelRatio || 1, 2);
  showPages.painter?.disconnect();
  const painter = new IntersectionObserver((entries) => {
    for (const { isIntersecting, target } of entries) {
      if (!isIntersecting) continue;
      painter.unobserve(target);
      const { doc, page } = target.postext;
      renderPageToCanvas(page, doc, target, { scale: (width * density) / page.width });
    }
  }, { rootMargin: '800px' });
  showPages.painter = painter;
  root.replaceChildren(...spreads.map((pair) => {
    const spread = document.createElement('div');
    spread.className = 'pt-spread';
    for (const p of pair) {
      const figure = document.createElement('figure');
      if (p) {
        const label = p.page.pageLabel || String(p.n + 1);
        const canvas = document.createElement('canvas');
        canvas.postext = p;
        canvas.style.aspectRatio = `${p.page.width} / ${p.page.height}`;
        canvas.setAttribute('role', 'img');
        canvas.setAttribute('aria-label', `Page ${label}`);
        const folio = document.createElement('figcaption');
        folio.textContent = label;
        figure.append(canvas, folio);
        painter.observe(canvas);
      } else figure.className = 'pt-blank';
      spread.append(figure);
    }
    return spread;
  }));
  kitStatus(`${pages.length} ${pages.length === 1 ? 'page' : 'pages'}`);
  document.documentElement.dataset.postext = 'ready';
  return pages.length;
}

/** The desk, the bar and the error reporting, created once. */
function viewer(title) {
  if (!document.getElementById('pt-kit')) {
    document.head.insertAdjacentHTML('beforeend', `<style id="pt-kit">
      :root { color-scheme: dark; }
      body { margin: 0; background: #0e1014; color: #b9bcc4; font: 13px/1.45 system-ui, sans-serif; }
      #pt-bar { position: sticky; top: 0; z-index: 1; display: flex; flex-wrap: wrap; align-items: center;
        gap: 6px 16px; padding: 10px 16px; background: rgb(14 16 20 / .92); backdrop-filter: blur(6px);
        border-bottom: 1px solid #23262d; }
      #pt-bar strong { color: #f4f1ea; font-weight: 600; }
      #pt-actions { display: flex; gap: 12px; margin-left: auto; }
      #pt-actions a, #pt-actions button { color: #d8a21a; font: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
      #pages { display: grid; justify-items: center; gap: 48px; padding: 32px 16px 72px; }
      .pt-spread { display: flex; }
      .pt-spread figure { margin: 0; width: min(460px, 44vw); }
      .pt-spread canvas { display: block; width: 100%; background: #fff;
        box-shadow: 0 1px 2px rgb(0 0 0 / .5), 0 22px 44px -16px rgb(0 0 0 / .8); }
      .pt-spread figure:first-child canvas { box-shadow: inset -14px 0 14px -14px rgb(0 0 0 / .18), 0 1px 2px rgb(0 0 0 / .5), 0 22px 44px -16px rgb(0 0 0 / .8); }
      .pt-spread figcaption { margin-top: 10px; text-align: center; font: 600 10px/1 system-ui, sans-serif;
        letter-spacing: .18em; text-transform: uppercase; color: #6c7079; }
      .pt-blank { visibility: hidden; }
      @media (max-width: 760px) {
        .pt-spread { flex-direction: column; gap: 32px; }
        .pt-spread figure { width: min(460px, 92vw); }
        .pt-blank { display: none; }
      }
    </style>`);
    document.body.insertAdjacentHTML('afterbegin',
      '<header id="pt-bar"><strong id="pt-title"></strong><span id="pt-status" role="status"></span><span id="pt-actions"></span></header>');
    document.getElementById('pt-title').textContent = document.title || 'Postext';
    addEventListener('error', (event) => kitFail(event.error ?? event.message));
    addEventListener('unhandledrejection', (event) => kitFail(event.reason));
  }
  if (title) document.getElementById('pt-title').textContent = title;
  return document.getElementById('pages')
    ?? document.body.appendChild(Object.assign(document.createElement('main'), { id: 'pages' }));
}

function kitStatus(text) {
  viewer();
  document.getElementById('pt-status').textContent = text;
}

function kitFail(error) {
  document.documentElement.dataset.postext = 'error';
  kitStatus(`Error: ${error?.message ?? error}`);
}

// ─── Kit · pdf v2 ── the same in every recipe that exports a PDF
/** The Fontsource files the screen used, as TrueType: the nearest weight the
 *  family ships, upright if it has no italic; latin, then what the face's
 *  letters need (kitSubsetsFor). */
async function fontsourceProvider(family, weight, style, request) {
  const id = fontsourceId(family);
  const meta = await fontsourceMeta(family);
  const weights = meta?.weights?.length ? meta.weights : [400, 700];
  const w = weights.reduce((a, b) => (Math.abs(b - weight) < Math.abs(a - weight) ? b : a));
  const s = style === 'italic' && meta && !meta.styles.includes('italic') ? 'normal' : style;
  const text = String.fromCodePoint(...(request?.codePoints ?? []));
  const more = kitSubsetsFor(text, meta);
  const files = await Promise.all(['latin', ...more].map(async (subset) => {
    const res = await fetch(`https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-${subset}-${w}-${s}.woff2`);
    if (!res.ok) throw new Error(`Fontsource has no ${family} ${w} ${s} ${subset}`);
    return decompressWoff2(new Uint8Array(await res.arrayBuffer()));
  }));
  return files.length === 1 ? files[0] : files;
}

/** A "Build the PDF" button; then "Open the PDF" (a new tab: CodePen's frame
 *  shows no PDFs) and a download link. */
function offerPdf(makePdf, filename) {
  viewer();
  const button = Object.assign(document.createElement('button'), { type: 'button', textContent: 'Build the PDF' });
  button.dataset.postextPdf = filename;
  button.addEventListener('click', async () => {
    button.disabled = true;
    button.textContent = 'Building the PDF…';
    try {
      const bytes = await makePdf();
      const url = URL.createObjectURL(new Blob([bytes], { type: 'application/pdf' }));
      const size = `${Math.max(1, Math.round(bytes.length / 1024))} KB`;
      button.replaceWith(
        Object.assign(document.createElement('a'), { href: url, target: '_blank', rel: 'noopener', textContent: 'Open the PDF ↗' }),
        Object.assign(document.createElement('a'), { href: url, download: filename, textContent: `Download ${filename} · ${size}` }));
    } catch (error) {
      button.disabled = false;
      button.textContent = 'Build the PDF';
      kitFail(error);
    }
  });
  document.getElementById('pt-actions').append(button);
}

// ─── Kit · images v1 ── recipes with pictures · postext.dev/cookbook
/** Registers a photo or PNG for the canvas and keeps its bytes for the PDF.
 *  fetch → ImageBitmap never taints the canvas (a plain cross-origin <img> would). */
async function loadImage(fileId, url) {
  const res = await fetch(url);
  if (!res.ok) throw new Error(`Image not found (${res.status}): ${url}`);
  const bytes = new Uint8Array(await res.arrayBuffer());
  registerResourceImage(fileId, await createImageBitmap(new Blob([bytes])));
  (loadImage.bytes ??= new Map()).set(fileId, bytes);
}

/** Registers SVG markup (drawn in code, or fetched) as a vector image. */
async function loadSvg(fileId, svg) {
  const img = new Image();
  img.src = `data:image/svg+xml;charset=utf-8,${encodeURIComponent(svg)}`;
  await img.decode();
  registerResourceImage(fileId, img);
  (loadImage.bytes ??= new Map()).set(fileId, new TextEncoder().encode(svg));
}

/** renderToPdf({ resourceBytes: imageBytes }) */
function imageBytes(fileId) { return loadImage.bytes?.get(fileId); }

/** renderToHtml({ resourceImageUrl: imageUrl }) */
function imageUrl(fileId) {
  const bytes = imageBytes(fileId);
  if (!bytes) return undefined;
  imageUrl.urls ??= new Map();
  if (!imageUrl.urls.has(fileId)) {
    const type = /\.svg$/i.test(fileId) ? 'image/svg+xml' : /\.png$/i.test(fileId) ? 'image/png' : 'image/jpeg';
    imageUrl.urls.set(fileId, URL.createObjectURL(new Blob([bytes], { type })));
  }
  return imageUrl.urls.get(fileId);
}

// ─── Kit · cjk v1 ── Chinese, Japanese and Korean books · postext.dev/cookbook
// Fontsource ships a CJK family as about a hundred files per weight, each
// declared in its stylesheet with the unicode-range it covers. The screen
// loads the files the sample touches; the PDF gets the same files for the
// characters its pages set in each face, and embeds each as a subset.
// A book bound on the right (vertical text) is shown with its spreads
// mirrored: page 1 alone on the left of the spine, then [3 | 2].

/** The files of a Fontsource face, read from its stylesheet: { url, range,
 *  ranges }, the last declared first (the order the browser tries them in). */
function cjkSlices(family, weight, style) {
  cjkSlices.cache ??= new Map();
  const id = fontsourceId(family);
  const css = `https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/${weight}${style === 'italic' ? '-italic' : ''}.css`;
  if (!cjkSlices.cache.has(css)) {
    cjkSlices.cache.set(css, fetch(css)
      .then((res) => {
        if (!res.ok) throw new Error(`Fontsource has no ${family} ${weight} ${style} (${res.status})`);
        return res.text();
      })
      .then((text) => [...text.matchAll(/@font-face\s*{([^}]*)}/g)].map(([, rule]) => {
        const range = /unicode-range:\s*([^;]+);/.exec(rule)?.[1].trim() ?? 'U+0-10FFFF';
        const ranges = range.split(',').map((part) => {
          const [lo, hi = lo] = part.trim().slice(2).split('-');
          return [parseInt(lo, 16), parseInt(hi, 16)];
        });
        return { url: new URL(/url\(([^)]+?\.woff2)\)/.exec(rule)[1], css).href, range, ranges };
      }).reverse()));
  }
  return cjkSlices.cache.get(css);
}

/** The file of `slices` that holds code point `cp`, if any. */
function cjkSliceFor(slices, cp) {
  return slices.find((slice) => slice.ranges.some(([lo, hi]) => cp >= lo && cp <= hi));
}

/** Whether Fontsource serves `family` as a Chinese, Japanese or Korean
 *  family (its subsets name the script). Fails when the API does not
 *  answer: a CJK face taken for a Latin one would paint in a system face. */
async function isCjkFamily(family) {
  const meta = await fontsourceMeta(family);
  if (!meta) throw new Error(`api.fontsource.org did not describe ${family}: reload to try again`);
  return !!meta.subsets?.some((subset) => /^(chinese|japanese|korean)/.test(subset));
}

/** faces = { 'Noto Serif TC': ['400', '700'] }, as for loadFonts: the
 *  whole FONTS object may be passed, its other families are left to
 *  loadFonts. Adds one FontFace per file of each CJK face with its
 *  unicodeRange, then loads the files `text` touches. `text` is what the
 *  faces set: the sample for the text face; a book in several voices calls
 *  it once per voice (loadCjkFonts({ 'LXGW WenKai TC': ['400'] }, quotes)),
 *  so the heading and quotation faces fetch and check only their own
 *  characters. Fails when a character of `text` is in no file of a face.
 *  List every weight the pages use: a weight left to buildWithFonts gets
 *  the latin file only. With { vertical: true } it also loads each
 *  family's vertical forms (brackets, quotes, pause marks) for the canvas,
 *  which needs loadVerticalAlternates imported from postext. Resolves to
 *  the number of files loaded. */
async function loadCjkFonts(faces, text, { vertical = false } = {}) {
  kitStatus('Loading fonts…');
  let loaded = 0;
  try {
    if (vertical && typeof loadVerticalAlternates !== 'function') {
      throw new Error('loadCjkFonts(…, { vertical: true }) needs loadVerticalAlternates imported from postext');
    }
    for (const [family, specs] of Object.entries(faces)) {
      if (!(await isCjkFamily(family))) continue;
      const twin = [];
      for (const spec of new Set(specs)) {
        const weight = parseInt(spec, 10);
        const style = spec.endsWith('i') ? 'italic' : 'normal';
        const slices = await cjkSlices(family, weight, style);
        const missing = [...new Set(text)].filter((ch) => /\S/.test(ch) && !cjkSliceFor(slices, ch.codePointAt(0)));
        if (missing.length) {
          throw new Error(`${family} ${spec} has no file for ${missing.slice(0, 12).join(' ')}: `
            + `give each face the text it sets (loadCjkFonts({ '${family}': ['${spec}'] }, text))`);
        }
        for (const slice of slices) {
          document.fonts.add(new FontFace(family, `url(${slice.url}) format('woff2')`,
            { weight: String(weight), style, unicodeRange: slice.range }));
          twin.push({ source: slice.url, weight: String(weight), style, unicodeRange: slice.range });
        }
        const font = `${style === 'italic' ? 'italic ' : ''}${weight} 16px "${family}"`;
        loaded += (await document.fonts.load(font, text)).length;
        if (!document.fonts.check(font, text)) throw new Error(`${family} ${spec} did not load for the sample`);
      }
      // The same files under a twin name with the `vert` feature on: the
      // canvas paints the punctuation of vertical lines with it.
      if (vertical && twin.length) await loadVerticalAlternates(family, twin);
    }
  } catch (error) {
    kitFail(error);
    throw error;
  }
  return loaded;
}

/** The PDF font provider for recipes with CJK faces: a family whose
 *  Fontsource subsets are Chinese, Japanese or Korean gets the files that
 *  hold the characters its pages set (`request.codePoints`); any other
 *  family gets the latin file fontsourceProvider fetches (the "pdf" block)
 *  and, when the face sets letters only latin-ext has, that file too. */
async function cjkPdfProvider(family, weight, style, request) {
  if (!(await isCjkFamily(family))) return cjkLatinPdfFiles(family, weight, style, request);
  const meta = await fontsourceMeta(family);
  const weights = meta.weights?.length ? meta.weights : [400, 700];
  const w = weights.reduce((a, b) => (Math.abs(b - weight) < Math.abs(a - weight) ? b : a));
  const s = style === 'italic' && !meta.styles.includes('italic') ? 'normal' : style;
  const slices = await cjkSlices(family, w, s);
  const picked = new Set();
  for (const cp of request?.codePoints ?? []) {
    const slice = cjkSliceFor(slices, cp);
    if (slice) picked.add(slice);
  }
  if (!picked.size) picked.add(slices[0]);
  return Promise.all(slices.filter((slice) => picked.has(slice)).map(async (slice) => {
    const res = await fetch(slice.url);
    if (!res.ok) throw new Error(`Fontsource file ${slice.url} (${res.status})`);
    return decompressWoff2(new Uint8Array(await res.arrayBuffer()));
  }));
}

/** A Latin family set next to the CJK faces: its latin file, then its
 *  latin-ext file when the face sets letters only latin-ext has (ō ū in
 *  Hepburn rōmaji, ǎ in pinyin), the file loadFonts adds on screen for
 *  them. Latin comes first: postext-pdf draws a character from the first
 *  file that has it, as the browser takes a character both files hold from
 *  latin. A face Fontsource ships without latin-ext, or whose file does
 *  not come, gets latin alone, and the PDF names the letters it lacks. */
async function cjkLatinPdfFiles(family, weight, style, request) {
  const meta = await fontsourceMeta(family);
  const beyond = [...(request?.codePoints ?? [])].some(cjkLatinExtOnly);
  if (!beyond || !meta?.subsets?.includes('latin-ext')) return fontsourceProvider(family, weight, style);
  const weights = meta.weights?.length ? meta.weights : [400, 700];
  const w = weights.reduce((a, b) => (Math.abs(b - weight) < Math.abs(a - weight) ? b : a));
  const s = style === 'italic' && !meta.styles.includes('italic') ? 'normal' : style;
  const id = fontsourceId(family);
  const url = `https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-latin-ext-${w}-${s}.woff2`;
  const [latin, ext] = await Promise.all([fontsourceProvider(family, weight, style), fetch(url)
    .then(async (res) => (res.ok ? decompressWoff2(new Uint8Array(await res.arrayBuffer())) : null), () => null)]);
  return ext ? [latin, ext] : latin;
}

/** Whether code point `cp` is in Fontsource's latin-ext file and not in
 *  its latin file: Latin Extended-A and -B, IPA, the spacing modifiers and
 *  Latin Extended Additional (loadFonts's test for latin-ext), less the
 *  few latin holds too (ı Œ œ ʻ ʼ ˆ ˚ ˜). */
function cjkLatinExtOnly(cp) {
  if (!((cp >= 0x100 && cp <= 0x2ff) || (cp >= 0x1e00 && cp <= 0x1eff))) return false;
  return ![0x131, 0x152, 0x153, 0x2bb, 0x2bc, 0x2c6, 0x2da, 0x2dc].includes(cp);
}

/** showPages for a book bound on either edge. A right-bound book (the
 *  document says so: doc.binding is 'right' for page.binding 'right' and
 *  for vertical text) lies on the desk as it opens: page 1 alone on the
 *  left of the spine, then [3 | 2], the spine shade on each page's inner
 *  edge. `binding` ('left' | 'right') overrides the document's. */
function showBook(docs, { binding, ...options } = {}) {
  const count = showPages(docs, options);
  const right = (binding ?? [docs].flat()[0]?.binding) === 'right';
  if (!document.getElementById('pt-kit-cjk')) {
    // The pages keep direction ltr: a canvas draws text in the direction its
    // element inherits, and under rtl each run would end where the engine
    // starts it, its brackets mirrored.
    document.head.insertAdjacentHTML('beforeend', `<style id="pt-kit-cjk">
      .pt-spread[dir="rtl"] canvas { direction: ltr; }
      .pt-spread[dir="rtl"] figure:first-child canvas { box-shadow: inset 14px 0 14px -14px rgb(0 0 0 / .18),
        0 1px 2px rgb(0 0 0 / .5), 0 22px 44px -16px rgb(0 0 0 / .8); }
    </style>`);
  }
  // Each pair stays [verso, recto] in the page; right to left, the verso
  // sits on the right. Phones stack the pages in reading order either way.
  for (const spread of document.querySelectorAll('#pages > .pt-spread')) spread.dir = right ? 'rtl' : 'ltr';
  document.getElementById('pages').dataset.binding = right ? 'right' : 'left';
  return count;
}

// ─── Kit · arabic v1 ── Arabic-script faces · postext.dev/cookbook
// Fontsource ships an Arabic family as one file per subset and weight: the
// `arabic` file holds the letters, the harakat, the Arabic-Indic digits, the
// Arabic punctuation and the presentation forms; `latin` and `latin-ext`
// hold the rest. loadFonts loads the latin files; this block adds the arabic
// file of every Arabic family, for the canvas and for the PDF, which shapes
// the letters with HarfBuzz from the same bytes.

/** The code points of Fontsource's `arabic` subset, as its stylesheets
 *  declare them (the same unicode-range the browser picks the file by). A
 *  function, not a const: the kit is inlined after the recipe's top-level
 *  awaits, and a const read before its line throws, where a function
 *  declaration is hoisted. */
function arabicRange() {
  return 'U+0600-06FF,U+0750-077F,U+0870-088E,U+0890-0891,U+0897-08E1,U+08E3-08FF,'
    + 'U+200C-200E,U+2010-2011,U+204F,U+2E41,U+FB50-FDFF,U+FE70-FE74,U+FE76-FEFC,U+102E0-102FB,'
    + 'U+10E60-10E7E,U+10EC2-10EC4,U+10EFC-10EFF,U+1EE00-1EEFF';
}

/** Whether code point `cp` is in the arabic file. */
function inArabicRange(cp) {
  inArabicRange.ranges ??= arabicRange().split(',').map((part) => {
    const [lo, hi = lo] = part.slice(2).split('-');
    return [parseInt(lo, 16), parseInt(hi, 16)];
  });
  return inArabicRange.ranges.some(([lo, hi]) => cp >= lo && cp <= hi);
}

/** Whether Fontsource serves `family` with an `arabic` subset. Fails when
 *  the API does not answer: an Arabic face taken for a Latin one would set
 *  its letters in a system face. */
async function isArabicFamily(family) {
  const meta = await fontsourceMeta(family);
  if (!meta) throw new Error(`api.fontsource.org did not describe ${family}: reload to try again`);
  return !!meta.subsets?.includes('arabic');
}

/** The arabic file of a face. */
function arabicFileUrl(family, weight, style) {
  const id = fontsourceId(family);
  return `https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-arabic-${weight}-${style}.woff2`;
}

/** faces = { Amiri: ['400', '700'] }, as for loadFonts, after it: the whole
 *  FONTS object may be passed, its families without an arabic subset are
 *  left alone. Adds the arabic file of every listed weight of each Arabic
 *  family (the latin files come from loadFonts) and loads it. `text` is
 *  the sample: fails when it holds an Arabic-script character the arabic
 *  file does not cover. List every weight the pages set in Arabic: a weight
 *  left to buildWithFonts gets the latin file only, and its Arabic letters
 *  fall back to a system face. Resolves to the number of files loaded. */
async function loadArabicFonts(faces, text = '') {
  kitStatus('Loading fonts…');
  let loaded = 0;
  try {
    const outside = [...new Set(text)].filter((ch) => /\p{Script=Arabic}/u.test(ch) && !inArabicRange(ch.codePointAt(0)));
    if (outside.length) throw new Error(`Fontsource's arabic files have no ${outside.slice(0, 12).join(' ')}`);
    for (const [family, specs] of Object.entries(faces)) {
      if (!(await isArabicFamily(family))) continue;
      for (const spec of new Set(specs)) {
        const weight = parseInt(spec, 10);
        const style = spec.endsWith('i') ? 'italic' : 'normal';
        const face = new FontFace(family, `url(${arabicFileUrl(family, weight, style)}) format('woff2')`,
          { weight: String(weight), style, unicodeRange: arabicRange() });
        document.fonts.add(await face.load().catch(() => {
          throw new Error(`Fontsource has no arabic file for ${family} ${weight} ${style}`);
        }));
        loaded++;
      }
    }
  } catch (error) {
    kitFail(error);
    throw error;
  }
  return loaded;
}

/** The PDF font provider for recipes with Arabic faces: a family with an
 *  arabic subset gets its arabic file when its pages set Arabic letters
 *  (`request.codePoints`), then its latin file, and its latin-ext file for
 *  the letters beyond latin (transliteration: ā ḥ ʿ). The arabic file comes
 *  first: it also holds the space and the brackets, so a line of Arabic is
 *  shaped as one run and not cut at every space. Any other family goes to
 *  fontsourceProvider (the "pdf" block). */
async function arabicPdfProvider(family, weight, style, request) {
  if (!(await isArabicFamily(family))) return fontsourceProvider(family, weight, style, request);
  const meta = await fontsourceMeta(family);
  const weights = meta.weights?.length ? meta.weights : [400, 700];
  const w = weights.reduce((a, b) => (Math.abs(b - weight) < Math.abs(a - weight) ? b : a));
  const s = style === 'italic' && !meta.styles.includes('italic') ? 'normal' : style;
  const wanted = [...(request?.codePoints ?? [])];
  const id = fontsourceId(family);
  const urls = [];
  if (!wanted.length || wanted.some(inArabicRange)) urls.push(arabicFileUrl(family, w, s));
  urls.push(`https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-latin-${w}-${s}.woff2`);
  if (meta.subsets.includes('latin-ext') && wanted.some((cp) => /[Ā-˿Ḁ-ỿ]/u.test(String.fromCodePoint(cp)))) {
    urls.push(`https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-latin-ext-${w}-${s}.woff2`);
  }
  return Promise.all(urls.map(async (url) => {
    const res = await fetch(url);
    if (!res.ok) throw new Error(`Fontsource file ${url} (${res.status})`);
    return decompressWoff2(new Uint8Array(await res.arrayBuffer()));
  }));
}

// ─── Kit · comics v1 ── comic pages · postext.dev/cookbook
// The engine letters a comic in a face per language (defaultComicFont:
// Comic Neue, Zen Antique for Japanese, Noto Sans SC, LXGW WenKai TC,
// Playpen Sans Arabic; defaultComicSfxFont: Bangers, Dela Gothic One,
// ZCOOL KuaiLe, Lalezar) and asks for the bold of a shout or a sound effect
// and the italic of an inner voice. Most of these faces ship one weight and
// no italic: this block declares the file Fontsource does ship for those
// variants, so the canvas measures and paints the letters the PDF embeds
// (the providers snap to the shipped file) and not a bold or a slant the
// browser makes up. It also turns the art manifest into panel resources.

/** faces = { 'Comic Neue': ['400', '700'], Bangers: ['400'] }, as for
 *  loadFonts, after it (and after loadCjkFonts or loadArabicFonts for the
 *  faces of those scripts); the whole FONTS object may be passed. List in
 *  FONTS only what Fontsource ships (Bangers: ['400']): loadFonts fails on
 *  the rest. For each family, the regular, bold, italic and bold italic it
 *  lacks are declared with its nearest file (the regular for the bold, the
 *  upright for the italic) and loaded for `text`. A CJK face needs the cjk
 *  block; an Arabic face setting Arabic, the arabic block. Resolves to the
 *  number of variants added. */
async function loadComicFonts(faces, text = '') {
  kitStatus('Loading fonts…');
  let added = 0;
  try {
    for (const family of Object.keys(faces)) {
      const meta = await fontsourceMeta(family);
      if (!meta) throw new Error(`api.fontsource.org did not describe ${family}: reload to try again`);
      const weights = meta.weights?.length ? meta.weights : [400, 700];
      const styles = meta.styles?.length ? meta.styles : ['normal'];
      for (const [weight, style] of [[400, 'normal'], [700, 'normal'], [400, 'italic'], [700, 'italic']]) {
        if ((weights.includes(weight) && styles.includes(style)) || hasFace(family, weight, style)) continue;
        const w = weights.reduce((a, b) => (Math.abs(b - weight) < Math.abs(a - weight) ? b : a));
        const s = style === 'italic' && styles.includes('italic') ? 'italic' : 'normal';
        for (const { url, range } of await comicFaceFiles(family, w, s, meta, text)) {
          document.fonts.add(new FontFace(family, `url(${url}) format('woff2')`,
            { weight: String(weight), style, unicodeRange: range }));
        }
        await document.fonts.load(`${style === 'italic' ? 'italic ' : ''}${weight} 16px "${family}"`, text || 'A');
        added++;
      }
    }
  } catch (error) {
    kitFail(error);
    throw error;
  }
  return added;
}

/** The files of a shipped face ({ url, range }): a CJK face's slices (the
 *  cjk block reads them from its stylesheet), else latin, the latin-ext
 *  and greek files `text` needs, and the arabic file when `text` holds
 *  Arabic. */
async function comicFaceFiles(family, weight, style, meta, text) {
  if (meta.subsets?.some((subset) => /^(chinese|japanese|korean)/.test(subset))) {
    if (typeof cjkSlices !== 'function') throw new Error(`${family} is a CJK face: list the cjk kit block`);
    return (await cjkSlices(family, weight, style)).map(({ url, range }) => ({ url, range }));
  }
  const id = fontsourceId(family);
  const file = (subset) => `https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-${subset}-${weight}-${style}.woff2`;
  const files = ['latin', ...kitSubsetsFor(text, meta)].map((subset) => ({ url: file(subset), range: comicRange(subset) }));
  if (meta.subsets?.includes('arabic') && /\p{Script=Arabic}/u.test(text)) {
    if (typeof arabicRange !== 'function') throw new Error(`${family} sets Arabic: list the arabic kit block`);
    files.unshift({ url: file('arabic'), range: arabicRange() });
  }
  return files;
}

/** The unicode-range loadFonts gives a Fontsource file. A function, not a
 *  const: the kit is inlined after the recipe's top-level awaits. */
function comicRange(subset) {
  return {
    latin: 'U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,'
      + 'U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD',
    'latin-ext': 'U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,'
      + 'U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF',
    greek: 'U+0370-03FF',
  }[subset];
}

/** The PDF font provider of a comic in any script: a CJK face goes to
 *  cjkPdfProvider, an Arabic face to arabicPdfProvider, any other to
 *  fontsourceProvider (the "pdf" block). Each embeds the shipped weight
 *  and style nearest to the one asked for, the file loadComicFonts
 *  declared for the canvas. */
async function comicPdfProvider(family, weight, style, request) {
  const subsets = (await fontsourceMeta(family))?.subsets ?? [];
  if (subsets.some((subset) => /^(chinese|japanese|korean)/.test(subset))) {
    if (typeof cjkPdfProvider !== 'function') throw new Error(`${family} is a CJK face: list the cjk kit block`);
    return cjkPdfProvider(family, weight, style, request);
  }
  if (subsets.includes('arabic') && typeof arabicPdfProvider === 'function') {
    return arabicPdfProvider(family, weight, style, request);
  }
  return fontsourceProvider(family, weight, style, request);
}

/** A panel picture as a resource for art= (and pop=): loads `url`
 *  (write asset('lh-arrive.jpg') in the call, so the lint checks the file)
 *  and declares it with `meta`, its entry in the art manifest:
 *  { width, height, alt, safeArea, anchors, avoid }. The safe area is what
 *  every crop keeps, the anchors the speakers' mouths, heads and faces,
 *  the avoid zones what no balloon covers; all in fractions of the picture,
 *  the same in every language. Without width and height, the picture's own
 *  size. Needs the images block. Resolves to the resource. */
async function comicPanel(id, url, meta = {}) {
  const fileId = decodeURIComponent(url.split('/').pop());
  await loadImage(fileId, url);
  let { width, height } = meta;
  if (!width || !height) {
    const bitmap = await createImageBitmap(new Blob([imageBytes(fileId)]));
    ({ width, height } = bitmap);
    bitmap.close();
  }
  return {
    id, typeId: meta.typeId ?? 'figure', kind: 'bitmap', createdAt: 0, updatedAt: 0,
    bitmap: { fileId, format: /\.png$/i.test(fileId) ? 'png' : 'jpeg', width, height },
    ...(meta.alt && { altText: meta.alt }),
    ...(meta.safeArea && { safeArea: meta.safeArea }),
    ...(meta.anchors?.length && { anchors: meta.anchors }),
    ...(meta.avoid?.length && { avoid: meta.avoid }),
  };
}

// ─── /Kit ───────────────────────────────────────────────────────────────────────
```

## よくあるつまずき

- **日本語のテキストのタグは'ja'。zh-HansやLANGにしない.** レシピの版はenとesですが、日本語のサンプルはどちらの版でも日本語です。`locale: LANG`では英語やスペイン語とタグ付けされ、中国語のタグでは中国語の規則で組まれます（開明式の約物、小書きの仮名が行頭に来てもよい、図の代わりに图、PDFでは中国の字形）。'ja'と書いてください。日本の地域（JLReqの改行と約物、ゴマの圏点、ルビの間隔、図と表の表示名）が選ばれ、ハイフネーションが切られます。リントは、zhやkoのタグで仮名を含むテキストをエラーにします。
- **中国語の書体はcjkブロックを通じてスライス単位で読み込む.** Fontsourceは中国語、日本語、韓国語のファミリーを、ウェイトごとに約100個のファイルとして配信し、各ファイルが文字の範囲を受け持ちます。loadFontsが取得するのはlatinファイルだけなので、画面では漢字がシステムの書体で出て計測が狂い、fontsourceProviderはPDFにそのlatinファイルを渡すため、漢字が空の四角で印字されます。キットのcjkブロックを挙げ、loadFontsのあとにloadCjkFonts(FONTS, markdown)を呼び（本で複数のCJK書体を使うときは、それぞれの書体で組むテキストを渡して書体ごとに1回）、renderToPdfにfontProvider: cjkPdfProviderを渡してください。どちらもテキストの文字を含むファイルを取得します。
- **設定はオブジェクトの同一性でキャッシュされる。毎回新しいオブジェクトを作る.** エンジンは解決済みの設定をオブジェクトの同一性でキャッシュします。そのため、設定をその場で書き換えて再ビルドすると前の結果が再利用されます。ビルドのたびに新しいオブジェクトを作ってください。レシピの設定がファクトリー関数config()になっているのはこのためです。
- **レイアウトの前にすべてのフォントを読み込む.** レイアウトはブラウザーが読み込んだフォントで文字を計測し、その幅をキャッシュします。最初のビルドのあとに届いたフォントがあると改行位置が狂い、PDFも画面と一致しなくなります。すべてのウェイトとスタイルを先に読み込み、遅れて届いたときは再ビルドの前にclearMeasurementCache()を呼んでください。

- 横書きの版に日本語のまま残した描き文字は、行に`vertical`がなければ、版のほかの文字と同じく横に組まれます。
- 空の歓声は日本語、スペイン語、カタルーニャ語では小さなコマより長く、エンジンにまかせると枠を越えてビルドが`comicBalloonOverflow`を警告しました。これらの版では`break`を付け（`sora{shout break}`）、意図して枠を上へ、コマの間と上のコマへ突き破らせるので、何も報告されません。`break`のフキダシは、コマが裁ち落としでない限りページの余白へは出ません。別の場所に置くなら`at=`で固定します。

## クレジット

- レシピ: Ignacio Ferro ([@drnachio](https://github.com/drnachio))
- テキスト: 決勝 (The Final), a one-page kendo manga written for this recipe, with its English, Spanish, Catalan, Chinese and Arabic letterings: Postext Cookbook, CC-BY-4.0
- 画像: The kendo final in a packed gym, two fighters between three referees: Generated With Diffusion Models, オリジナル
- 画像: Hana's eyes through her helmet grille: Generated With Diffusion Models, オリジナル
- 画像: The opponent lunging with speed lines: Generated With Diffusion Models, オリジナル
- 画像: Hana's leaping strike to the helmet: Generated With Diffusion Models, オリジナル
- 画像: Sora cheering in the stands: Generated With Diffusion Models, オリジナル
- 画像: Coach Mori nodding while the referees raise their flags: Generated With Diffusion Models, オリジナル
- 書体: Zen Antique (OFL-1.1), Dela Gothic One (OFL-1.1), Comic Neue (OFL-1.1), Bangers (OFL-1.1), Noto Sans SC (OFL-1.1), ZCOOL KuaiLe (OFL-1.1), Playpen Sans Arabic (OFL-1.1), Lalezar (OFL-1.1)
- コード: MIT · サンプルの内容: CC-BY-4.0

## 関連レシピ

- [No. 118 · 縦組み二段組の短編、題は2段を通して](https://postext.dev/ja/cookbook/two-tier-tankobon.md): 全集に収めた芥川の短編2編。A5判に1段25字の二段組で、各題を奇数ページで2段に通し、最終ページは成り行きのまま残します。 · 難易度 2 (中級) · 小説・戯曲・文芸
- [No. 144 · 同じコマを三通りのページ割りで](https://postext.dev/ja/cookbook/comic-page-splitters.md): 五つのコマを三つの分割ツリーで組む。:::pageのsplit属性がページを割り、各絵のセーフエリアがどんな形のコマでも主役を画面に残します。 · 難易度 2 (中級) · 漫画・コミック
- [No. 153 · 六つの言語で写植した一ページ](https://postext.dev/ja/cookbook/one-page-six-languages.md): コマ割りと絵はそのまま、言語ごとのせりふから写植します。locale が書体を選び、日本語は縦書きで、日本語とアラビア語は右から読みます。 · 難易度 3 (上級) · 漫画・コミック