Function build

src/index.ts:248–318

()

  }

  function build(): Uint8Array {
    const fontRef = addObject({
      Type: '/Font',
      Subtype: '/Type1',
      BaseFont: '/Helvetica'
    })

    const pagesRef = addObject({
      Type: '/Pages',
      Kids: pages,
      Count: pages.length
    })

    for (const obj of objects) {
      if (obj.dict.Type === '/Page') {
        obj.dict.Parent = pagesRef
        const resources = obj.dict.Resources as Record<string, PDFValue> | undefined
        if (resources?.Font) {
          (resources.Font as Record<string, PDFValue>).F1 = fontRef
        }
      }
    }

    const catalogRef = addObject({
      Type: '/Catalog',
      Pages: pagesRef
    })

    const parts: (string | Uint8Array)[] = []
    const offsets: number[] = []

    parts.push('%PDF-1.4\n%\xFF\xFF\xFF\xFF\n')

    for (const obj of objects) {
      offsets[obj.id] = parts.reduce((sum, p) => sum + (typeof p === 'string' ? new TextEncoder().encode(p).length : p.length), 0)

      let content = `${obj.id} 0 obj\n${serialize(obj.dict)}\n`
      if (obj.stream) {
        content += 'stream\n'
        parts.push(content)
        parts.push(obj.stream)
        parts.push('\nendstream\nendobj\n')
      } else {
        content += 'endobj\n'
        parts.push(content)
      }
    }

    const xrefOffset = parts.reduce((sum, p) => sum + (typeof p === 'string' ? new TextEncoder().encode(p).length : p.length), 0)

    let xref = `xref\n0 ${objects.length + 1}\n`
    xref += '0000000000 65535 f \n'
    for (let i = 1; i <= objects.length; i++) {
      xref += String(offsets[i]).padStart(10, '0') + ' 00000 n \n'
    }
    parts.push(xref)

    parts.push(`trailer\n${serialize({ Size: objects.length + 1, Root: catalogRef })}\n`)