def merge_page_with_possible_rotation(page: PageObject,
numbers_page: PageObject):
ur_x = page.artBox.getUpperRight_x()
ur_y = page.artBox.getUpperRight_y()
if ur_x > ur_y:
# This page is oriented in a very odd way
# and we need to rotate our overlay on top of it.
# https://stackoverflow.com/a/23633769
page.mergeRotatedTranslatedPage(
numbers_page,
270,
numbers_page.mediaBox.getWidth() / 2,
numbers_page.mediaBox.getWidth() / 2,
)
else:
page.mergePage(numbers_page)
def add_text_on_page(pdf_page: PageObject, texts: Iterable[TextOnPage]) -> PageObject:
buf = io.BytesIO()
# create a new PDF with Reportlab
pdfmetrics.registerFont(UnicodeCIDFont(PDF_FONT)) # 日本語表示のためにフォントを登録する必要がある
can = canvas.Canvas(buf, pagesize=A4)
# 与えられたテキスト情報を canvas に追加していく
for text in texts:
text_obj = can.beginText(text.position.x, text.position.y)
text_obj.setFont(PDF_FONT, text.position.font_size)
text_obj.setCharSpace(text.position.char_space)
text_obj.textLine(text.text) # textLine() する前に他の setXxx() を終わらせる必要がある
can.drawText(text_obj)
can.save()
buf.seek(0)
temp_pdf = PdfFileReader(buf)
pdf_page.mergePage(temp_pdf.getPage(0))
return pdf_page
