pdfPageBoundary

Page boundary boxes — ISO 32000-2 §14.11.2.

Module pdfPageBoundary | Source packages/front/office/pdf/src/prepress/pageBoundary.js | Deps pdfErrors, pdfParser | Worker-safe yes

Computes a page's effective boundary boxes following the §14.11.2 Table 31 inheritance rules:

• /MediaBox — paper size, mandatory.
• /CropBox — visible area, defaults to MediaBox.
• /TrimBox — finished trim area, defaults to CropBox.
• /BleedBox — bleed area, defaults to CropBox.
• /ArtBox — meaningful content area, defaults to CropBox.

Each box is [llx, lly, urx, ury]. The module accepts either an already-typed page record (with mediaBox/cropBox/… own fields) or a raw dict-shape object ({ entries: { MediaBox, … } } or { raw: { entries: {...} } }), and validates the box shape (4 numeric elements) before returning it.

Resolve

const pb = runtime.resolve('pdfPageBoundary');
// Returns: { effectiveMediaBox, effectiveCropBox, effectiveTrimBox, effectiveBleedBox, effectiveArtBox }

API

page is the output of pdfPage.typePage.

Examples

Imposition

const pb = runtime.resolve('pdfPageBoundary');
for (const page of doc.pages) {
    const trim  = pb.effectiveTrimBox(page);
    const bleed = pb.effectiveBleedBox(page);
    const margin = trim[0] - bleed[0];   // left bleed margin
}

Screen rendering

const view = pb.effectiveCropBox(page);
canvas.width  = view[2] - view[0];
canvas.height = view[3] - view[1];

Errors

See also

• pdfPage · pdfOutputIntent