doc.py 文件源码

def __save(self, target_path, pages, progress_cb=dummy_export_progress_cb):
        # XXX(Jflesch): This is a problem. It will fails if someone tries
        # to export to a non-local directory. We should use
        # cairo_pdf_surface_create_for_stream()
        target_path = self.doc.fs.unsafe(target_path)

        pdf_surface = cairo.PDFSurface(target_path,
                                       self.__page_format[0],
                                       self.__page_format[1])
        pdf_context = cairo.Context(pdf_surface)

        pages = [self.doc.pages[x] for x in range(pages[0], pages[1])]
        for page_idx, page in enumerate(pages):
            progress_cb(page_idx, len(pages))
            img = page.img
            if (img.size[0] < img.size[1]):
                (x, y) = (min(self.__page_format[0], self.__page_format[1]),
                          max(self.__page_format[0], self.__page_format[1]))
            else:
                (x, y) = (max(self.__page_format[0], self.__page_format[1]),
                          min(self.__page_format[0], self.__page_format[1]))
            pdf_surface.set_size(x, y)

            logger.info("Adding text to PDF page {} ...".format(page))
            self.__paint_txt(pdf_surface, (x, y), pdf_context, page)
            logger.info("Adding image to PDF page {} ...".format(page))
            self.__paint_img(pdf_surface, (x, y), pdf_context, page)
            pdf_context.show_page()
            logger.info("Page {} ready".format(page))

        progress_cb(len(pages), len(pages))
        return self.doc.fs.safe(target_path)