pdf.py 文件源码

def get_default_document(_buffer, footer: str=None) -> BaseDocTemplate:
    def on_page(canvas, doc, footer=footer):
        canvas.saveState()
        if footer:
            canvas.setFontSize(8)
            for i, line in enumerate(footer.split('\n')[::-1]):
                canvas.drawCentredString(PAGESIZE[0] / 2, 25 + (3.5 * i) * mm, line.strip())
            canvas.restoreState()

    doc = BaseDocTemplate(
        _buffer,
        pagesize=PAGESIZE,
        leftMargin=25 * mm,
        rightMargin=20 * mm,
        topMargin=20 * mm,
        bottomMargin=20 * mm,
    )
    frame = Frame(doc.leftMargin, doc.bottomMargin, doc.width, doc.height,
                  leftPadding=0, rightPadding=0, topPadding=0, bottomPadding=0, id='normal')
    doc_template = PageTemplate(id='all', pagesize=PAGESIZE, frames=[frame], onPage=on_page)
    doc.addPageTemplates([doc_template])
    return doc