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book(E1): vendor pdf-lib + book PDF export skeleton
First slice of Phase E. The Pages overview now has an Export PDF… button that walks the physical-page sequence, renders each page at print DPI, and stamps them into a single PDF via pdf-lib. Library: - Vendored [email protected].1 as src/vendor/pdf-lib.min.js (~513 KB, MIT). Lazy-loaded through loadPdfLibOnce() so the cost is only paid when an author actually exports. Pipeline: - exportBookToPdf({ dpi, includeCover }) walks enumerateBookPhysicalPages(book), rendering each slot at the resolved DPI (default 200) onto a trim-sized canvas: * Designed pages → master underlay + page layers via drawLayerToCanvas, with token substitution applied to master text layers (book.spec.textStyles tokens resolve per page). * Reflow physical pages → master underlay (with text-frame outline stripped) + the pagination engine's block output drawn via fillText at the frame's coordinates. * Cover → wide spread canvas, all book-cover-* / book-spine layers drawn in place. - Each canvas converts to PNG via canvas.toBlob → Uint8Array, then pdf-lib's embedPng + addPage at trimW×trimH points (cover spread is its own landscape page at the end). UI: - Export PDF… button in the Pages overview toolbar with a status line that surfaces progress + warnings (failed image embeds, per-page render errors). - Filename = `<title-slug>.pdf`. Known v1 limitations (handled in later E phases): - Raster-only: every page is a PNG inside the PDF. Real PDF text for embeddable-allowlist fonts comes in E3. - No bleed-inclusive output / crop marks / page-range / two-file modes yet (E2). - Linked-design layers + premium-gated content not exercised. Co-Authored-By: Claude Opus 4.7 <[email protected]>
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@@ -4417,10 +4417,12 @@
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<button type="button" id="bookAddPageBtn" class="primary">+ Add page</button>
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<button type="button" id="bookAddTenBtn">+ Add 10 pages</button>
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<button type="button" id="bookAddChapterBtn">+ Add chapter</button>
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<button type="button" id="bookExportPdfBtn" title="Export this book as a PDF (interior pages + cover spread)">Export PDF…</button>
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<span id="bookExportPdfStatus" class="hint" style="margin-left:6px;font-size:.74rem"></span>
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</div>
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</div>
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<div class="deckSlideGrid" id="bookPagesGrid"></div>
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<p class="hint" id="bookPagesHint" style="margin:8px 0 0">Click a designed-page tile to edit it on the canvas. Click a chapter tile to edit its markdown. Per-page Nostr publish (per-event sidecars + manifest) lands in Phase D1.</p>
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<p class="hint" id="bookPagesHint" style="margin:8px 0 0">Click a designed-page tile to edit it on the canvas. Click a chapter tile to edit its markdown. PDF export is raster-only in v1 (real-text mode for embeddable fonts lands in a follow-up slice).</p>
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</div>
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<div id="bookCoverView" style="display:none">
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<div class="bookCoverSummary" id="bookCoverSummary"></div>
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@@ -25047,6 +25049,279 @@
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// Slide / Custom Art / Pixel Art standalone: one flat rectangle of
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// layers on a background colour. Slides share the customart payload
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// shape under `state.customArt`.
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// ---- Book PDF export (Phase E1) -------------------------------------
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// pdf-lib lazy-load. Vendored as ~513 KB so we don't pay the
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// cost on every page-load; the export modal triggers this.
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let _pdfLibPromise = null;
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function loadPdfLibOnce() {
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if (window.PDFLib) return Promise.resolve(window.PDFLib);
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if (_pdfLibPromise) return _pdfLibPromise;
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_pdfLibPromise = loadScriptOnce('vendor/pdf-lib.min.js').then(() => {
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if (!window.PDFLib) throw new Error('pdf-lib loaded but PDFLib global is missing');
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return window.PDFLib;
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}).catch(err => {
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_pdfLibPromise = null;
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throw err;
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});
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return _pdfLibPromise;
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}
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// Render one designed page (master underlay + page layers) to a
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// print-DPI canvas. Token substitution is applied to master text
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// layers so `{page-number}` etc resolve correctly per page.
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async function renderBookDesignedPageToCanvas(entry, dpi, ctxToken) {
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const book = state.book || {};
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const spec = book.spec || {};
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const trimW = Number(spec.trimW) || 6;
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const trimH = Number(spec.trimH) || 9;
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const canvas = document.createElement('canvas');
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const ctx = setupExportCanvas(canvas, trimW, trimH, dpi);
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const bg = entry.background || spec.background || '#ffffff';
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if (bg && bg.toLowerCase() !== '#ffffff' && bg.toLowerCase() !== '#fff') {
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ctx.fillStyle = bg;
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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}
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// Page coords on the editor have x/y relative to the bleed-
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// inclusive artboard origin; for PDF export at trim-only size
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// we offset by -bleed so the page renders at (0,0).
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const bleed = Number(spec.bleed) || 0;
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const offX = -bleed * dpi;
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const offY = -bleed * dpi;
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// Master underlay first.
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const masterId = effectiveMasterIdForPage(entry);
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const masterTarget = masterId ? `book-master:${masterId}` : null;
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const masterLayers = masterTarget
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? (state.layers || [])
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.filter(l => l.target === masterTarget && !l.hidden
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&& !(l.type === 'shape' && l.shape?.kind === 'text-frame'))
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.slice().sort((a, b) => (a.z || 0) - (b.z || 0))
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: [];
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const subMaster = applyBookTokensToLayers(masterLayers, ctxToken);
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for (const l of subMaster) await drawLayerToCanvas(ctx, l, dpi, offX, offY);
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// Page layers on top.
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const pageTarget = `book-page:${entry.id}`;
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const pageLayers = (state.layers || [])
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.filter(l => l.target === pageTarget && !l.hidden)
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.slice().sort((a, b) => (a.z || 0) - (b.z || 0));
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const subPage = applyBookTokensToLayers(pageLayers, ctxToken);
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for (const l of subPage) await drawLayerToCanvas(ctx, l, dpi, offX, offY);
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return canvas;
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}
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// Render one physical page of a reflow segment: master underlay
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// (with the text-frame outline stripped) + paginated text blocks
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// drawn via fillText at the frame's coordinates.
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async function renderBookReflowPhysicalPageToCanvas(entry, paginated, indexInEntry, dpi, ctxToken) {
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const book = state.book || {};
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const spec = book.spec || {};
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const trimW = Number(spec.trimW) || 6;
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const trimH = Number(spec.trimH) || 9;
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const bleed = Number(spec.bleed) || 0;
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const canvas = document.createElement('canvas');
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const ctx = setupExportCanvas(canvas, trimW, trimH, dpi);
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const bg = spec.background || '#ffffff';
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if (bg && bg.toLowerCase() !== '#ffffff' && bg.toLowerCase() !== '#fff') {
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ctx.fillStyle = bg;
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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}
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// Master layers (no text-frame outline).
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const masterId = effectiveMasterIdForPage(entry);
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if (masterId) {
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const masterTarget = `book-master:${masterId}`;
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const masterLayers = (state.layers || [])
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.filter(l => l.target === masterTarget && !l.hidden
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&& !(l.type === 'shape' && l.shape?.kind === 'text-frame'))
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.slice().sort((a, b) => (a.z || 0) - (b.z || 0));
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const subMaster = applyBookTokensToLayers(masterLayers, ctxToken);
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const offX = -bleed * dpi;
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const offY = -bleed * dpi;
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for (const l of subMaster) await drawLayerToCanvas(ctx, l, dpi, offX, offY);
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}
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// Paint the paginated text blocks for this physical page.
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const page = paginated.pages[indexInEntry];
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const frame = paginated.frame;
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if (!page || !frame) return canvas;
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const padding = Number(frame.padding) || 0;
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const innerX = (frame.x + padding) - bleed; // trim-relative inches
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const innerY = (frame.y + padding) - bleed;
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for (const block of (page.blocks || [])) {
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const style = block.style || {};
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const fontSizePt = Number(style.fontSize) || 11;
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const fontPx = fontSizePt * (dpi / 72);
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const family = style.fontFamily || 'Georgia, serif';
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const weight = style.fontWeight || 400;
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const styleAttr = style.fontStyle || 'normal';
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ctx.font = `${styleAttr} ${weight} ${fontPx}px ${family}`;
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ctx.fillStyle = style.color || '#111';
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ctx.textBaseline = 'top';
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const align = style.alignment || 'left';
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ctx.textAlign = align === 'center' ? 'center' : align === 'right' ? 'right' : 'left';
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const blockYPx = (innerY * dpi) + (Number(block.y) || 0) * dpi;
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const marginLeftIn = Number(style.marginLeft) || 0;
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const marginRightIn = Number(style.marginRight) || 0;
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const xStartIn = innerX + marginLeftIn;
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const lineH = fontPx * (Number(style.lineHeight) || 1.5);
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for (let i = 0; i < (block.lines || []).length; i++) {
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let xPx;
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if (align === 'center') {
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const widthIn = (frame.w - 2 * padding) - marginLeftIn - marginRightIn;
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xPx = (xStartIn + widthIn / 2) * dpi;
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} else if (align === 'right') {
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const rightIn = innerX + (frame.w - 2 * padding) - marginRightIn;
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xPx = rightIn * dpi;
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} else {
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xPx = xStartIn * dpi;
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}
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ctx.fillText(block.lines[i], xPx, blockYPx + i * lineH);
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}
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}
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return canvas;
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}
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// Render the cover spread to one wide canvas. Layers carry their
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// own book-cover-front / book-cover-back / book-spine targets
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// already positioned in inch-space across the full spread.
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async function renderBookCoverToCanvas(dpi) {
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const spec = state.book?.spec || {};
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const trimW = Number(spec.trimW) || 6;
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const trimH = Number(spec.trimH) || 9;
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const bleed = Number(spec.bleed) || 0;
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const hasBack = !!spec.coverHasBack;
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const hasSpine = !!spec.coverHasSpine;
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const spineW = hasSpine ? bookSpineWidthInches() : 0;
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const spreadW = (hasBack ? trimW : 0) + spineW + trimW + bleed * 2;
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const spreadH = trimH + bleed * 2;
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const canvas = document.createElement('canvas');
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const ctx = setupExportCanvas(canvas, spreadW, spreadH, dpi);
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const bg = spec.coverBackground || '#ffffff';
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if (bg && bg.toLowerCase() !== '#ffffff' && bg.toLowerCase() !== '#fff') {
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ctx.fillStyle = bg;
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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}
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const coverLayers = (state.layers || [])
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.filter(l => /^book-cover-|^book-spine$/.test(String(l.target || '')) && !l.hidden)
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.slice().sort((a, b) => (a.z || 0) - (b.z || 0));
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for (const l of coverLayers) await drawLayerToCanvas(ctx, l, dpi);
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return canvas;
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}
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// Helper: canvas → PNG Uint8Array (pdf-lib's embedPng wants raw bytes).
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function _canvasToPngBytes(canvas) {
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return new Promise((resolve, reject) => {
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canvas.toBlob(async (blob) => {
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if (!blob) return reject(new Error('Canvas toBlob returned null'));
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try {
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const buf = await blob.arrayBuffer();
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resolve(new Uint8Array(buf));
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} catch (err) { reject(err); }
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}, 'image/png');
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});
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}
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// Phase E1 orchestrator. Walks the physical-page sequence, renders
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// each to canvas, embeds as PDF pages. Returns { blob, warnings }.
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async function exportBookToPdf(opts = {}) {
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const PDFLib = await loadPdfLibOnce();
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const book = state.book;
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if (!book) throw new Error('No book to export.');
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const dpi = Math.max(72, Math.min(450, Number(opts.dpi) || 200));
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const includeCover = opts.includeCover !== false;
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const seq = enumerateBookPhysicalPages(book);
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if (!seq.length && !(includeCover && book.cover)) {
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throw new Error('Nothing to export — add at least one page or chapter first.');
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}
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const pdfDoc = await PDFLib.PDFDocument.create();
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const warnings = [];
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_exportFailedImages.clear();
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// Per physical page.
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const reflowCache = new Map(); // entryId → paginateChapter result
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const spec = book.spec || {};
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const trimWpt = (Number(spec.trimW) || 6) * 72;
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const trimHpt = (Number(spec.trimH) || 9) * 72;
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for (const slot of seq) {
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const entry = book.pages.find(p => p.id === slot.entryId);
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if (!entry) continue;
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const ctxToken = bookTokenContext(book, slot.entryId, slot.indexInEntry);
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let canvas;
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try {
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if (slot.type === 'reflow') {
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let pag = reflowCache.get(slot.entryId);
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if (!pag) { pag = paginateChapter(entry, book); reflowCache.set(slot.entryId, pag); }
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canvas = await renderBookReflowPhysicalPageToCanvas(entry, pag, slot.indexInEntry, dpi, ctxToken);
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} else {
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canvas = await renderBookDesignedPageToCanvas(entry, dpi, ctxToken);
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}
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} catch (err) {
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warnings.push(`Page ${(slot.pageNumber != null) ? slot.pageNumber : '?'}: ${err.message || err}`);
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continue;
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}
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const png = await _canvasToPngBytes(canvas);
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const embedded = await pdfDoc.embedPng(png);
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const page = pdfDoc.addPage([trimWpt, trimHpt]);
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page.drawImage(embedded, { x: 0, y: 0, width: trimWpt, height: trimHpt });
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}
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// Cover spread on its own landscape page at the end.
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if (includeCover && book.cover) {
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try {
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const coverCanvas = await renderBookCoverToCanvas(dpi);
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const png = await _canvasToPngBytes(coverCanvas);
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const embedded = await pdfDoc.embedPng(png);
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const spec2 = book.spec || {};
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const trimW = Number(spec2.trimW) || 6;
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const trimH = Number(spec2.trimH) || 9;
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const bleed = Number(spec2.bleed) || 0;
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const hasBack = !!spec2.coverHasBack;
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const hasSpine = !!spec2.coverHasSpine;
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const spineW = hasSpine ? bookSpineWidthInches() : 0;
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const spreadW = (hasBack ? trimW : 0) + spineW + trimW + bleed * 2;
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const spreadH = trimH + bleed * 2;
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const page = pdfDoc.addPage([spreadW * 72, spreadH * 72]);
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page.drawImage(embedded, { x: 0, y: 0, width: spreadW * 72, height: spreadH * 72 });
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} catch (err) {
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warnings.push(`Cover: ${err.message || err}`);
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}
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}
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if (_exportFailedImages.size) {
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warnings.push(`${_exportFailedImages.size} image${_exportFailedImages.size === 1 ? '' : 's'} could not be embedded (CORS / missing).`);
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}
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const bytes = await pdfDoc.save();
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const blob = new Blob([bytes], { type: 'application/pdf' });
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return { blob, warnings };
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}
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async function downloadBookPdf() {
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const book = state.book;
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if (!book) return;
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const btn = document.getElementById('bookExportPdfBtn');
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const status = document.getElementById('bookExportPdfStatus');
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const setStatus = (text, kind) => {
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if (!status) return;
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status.textContent = text || '';
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status.style.color = kind === 'error' ? '#b91c1c'
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: kind === 'ok' ? '#15803d' : 'var(--muted)';
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};
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if (btn) btn.disabled = true;
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setStatus('Rendering PDF…');
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try {
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const { blob, warnings } = await exportBookToPdf();
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const a = document.createElement('a');
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const url = URL.createObjectURL(blob);
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const slug = (state.meta?.title || 'book')
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.toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/^-+|-+$/g, '').slice(0, 64);
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a.href = url;
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a.download = `${slug || 'book'}.pdf`;
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document.body.appendChild(a);
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a.click();
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document.body.removeChild(a);
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setTimeout(() => URL.revokeObjectURL(url), 4000);
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if (warnings.length) {
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setStatus(`Exported with ${warnings.length} warning${warnings.length === 1 ? '' : 's'}: ${warnings[0]}`, 'error');
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} else {
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setStatus(`Exported ${(blob.size / 1024).toFixed(0)} KB.`, 'ok');
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}
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} catch (err) {
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console.warn('PDF export failed', err);
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setStatus('Export failed: ' + (err?.message || 'unknown'), 'error');
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} finally {
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if (btn) btn.disabled = false;
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}
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}
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// ---- end Book PDF export --------------------------------------------
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async function renderCustomArtToExportCanvas(dpi) {
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const ca = state.customArt || { width: 1920, height: 1080, background: '#ffffff' };
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const wIn = (Number(ca.width) || 1920) / 96;
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@@ -34461,6 +34736,7 @@
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on('bookViewTogglePages', 'click', () => setBookSubView('pages'));
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on('bookViewToggleCover', 'click', () => setBookSubView('cover'));
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on('bookCoverEditBtn', 'click', openBookCover);
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on('bookExportPdfBtn', 'click', downloadBookPdf);
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on('bookPageEditBack', 'click', () => {
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// Same back-button serves per-page, per-master, and cover modes.
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if (state.book?.editingMasterId) closeBookMaster();
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Vendored
+16
@@ -0,0 +1,16 @@
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!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports):"function"==typeof define&&define.amd?define(["exports"],e):e((t=t||self).PDFLib={})}(this,(function(t){"use strict";
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/*! *****************************************************************************
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||||
Copyright (c) Microsoft Corporation. All rights reserved.
|
||||
Licensed under the Apache License, Version 2.0 (the "License"); you may not use
|
||||
this file except in compliance with the License. You may obtain a copy of the
|
||||
License at http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
||||
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
|
||||
WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
|
||||
MERCHANTABLITY OR NON-INFRINGEMENT.
|
||||
|
||||
See the Apache Version 2.0 License for specific language governing permissions
|
||||
and limitations under the License.
|
||||
***************************************************************************** */var e=function(t,n){return(e=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var n in e)e.hasOwnProperty(n)&&(t[n]=e[n])})(t,n)};function n(t,n){function r(){this.constructor=t}e(t,n),t.prototype=null===n?Object.create(n):(r.prototype=n.prototype,new r)}var r=function(){return(r=Object.assign||function(t){for(var e,n=1,r=arguments.length;n<r;n++)for(var i in e=arguments[n])Object.prototype.hasOwnProperty.call(e,i)&&(t[i]=e[i]);return t}).apply(this,arguments)};function i(t,e,n,r){return new(n||(n=Promise))((function(i,o){function a(t){try{l(r.next(t))}catch(t){o(t)}}function s(t){try{l(r.throw(t))}catch(t){o(t)}}function l(t){var e;t.done?i(t.value):(e=t.value,e instanceof n?e:new n((function(t){t(e)}))).then(a,s)}l((r=r.apply(t,e||[])).next())}))}function o(t,e){var n,r,i,o,a={label:0,sent:function(){if(1&i[0])throw i[1];return 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Reference in new issue
Block a user