text: # -*- coding: utf-8 -*-
  
  """
  This is free and unencumbered software released into the public domain.
  
  Anyone is free to copy, modify, publish, use, compile, sell, or
  distribute this software, either in source code form or as a compiled
  binary, for any purpose, commercial or non-commercial, and by any
  means.
  
  In jurisdictions that recognize copyright laws, the author or authors
  of this software dedicate any and all copyright interest in the
  software to the public domain. We make this dedication for the benefit
  of the public at large and to the detriment of our heirs and
  successors. We intend this dedication to be an overt act of
  relinquishment in perpetuity of all present and future rights to this
  software under copyright law.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  OTHER DEALINGS IN THE SOFTWARE.
  
  For more information, please refer to <http://unlicense.org/>
  """
  
  from .polyglotpdfzip import PolyglotPdfZip
  import logging
  import tempfile
  from Truepolyglot.ZipFileTransformer import ZipFile
  from Truepolyglot.ZipFileTransformer import Zip
  from Truepolyglot.PdfFileTransformer import Pdf
  
  '''
      |-----------------------------------|  -
      |--------- ZIP Data[0] = -----------|  |
      |- PDF Header + PDF Obj[0] Header --|  |
      |-----------------------------------|  | K2
      |------- PDF Obj[0] stream =  ------|  |
      |--------- ZIP Data LF [1:] --------|  |
      |-----------------------------------|  -
      |------ Original PDF Ojbects -------|  |
      |-----------------------------------|  |
      |------------ Xref Table -----------|  |
      |-----------------------------------|  | J2
      |------------- Trailer -------------|  |
      |-----------------------------------|  -
      |---------- End Zip Data -----------|
      |-----------------------------------|
  '''
  
  
  class PolyglotSZipPdf(PolyglotPdfZip):
  
      def __init__(self, Pdf, Zip, acrobat_compatibility):
          super().__init__(Pdf, Zip)
          self.acrobat_compatibility = acrobat_compatibility
  
      def get_rebuild_zip_first_part_size(self):
  
          zo_path = tempfile.mkstemp()[1]
          logging.info("use tmp file zip: " + zo_path)
          zo = ZipFile(zo_path, 'a')
          zi = ZipFile(self.zip.filename, 'r')
          for zipinfo in zi.infolist():
              zo.writestr(zipinfo, zi.read(zipinfo))
          zi.close()
          zo.close()
  
          rebuild_zip = Zip(zo_path)
  
          p = rebuild_zip.end_of_data
          k2_stream = rebuild_zip.buffer[:p]
  
          size_k2_stream = len(k2_stream)
  
          return size_k2_stream
  
      def get_pdf_header(self):
          return self.pdf.get_file_header()
  
      def generate_zip_with_pdf_part(self, filename, pdf_data):
  
          zo = ZipFile(filename, 'a')
          zi = ZipFile(self.zip.filename, 'r')
          zo.writestr(' ', pdf_data, 0)
          for zipinfo in zi.infolist():
              zo.writestr(zipinfo, zi.read(zipinfo))
          zi.close()
          zo.close()
  
      def get_rebuild_pdf(self, zo_path, offset):
          '''
              Generate polyglot with final zip.
          '''
          new_zip = Zip(zo_path)
          new_pdf = Pdf(self.pdf.filename)
  
          p1 = new_zip.end_of_first_local_file_header
          p2 = new_zip.end_of_data
          k2_stream = new_zip.buffer[p1:p2]
  
          size_k2_stream = len(k2_stream)
          new_pdf.insert_new_obj_stream_at_start(k2_stream)
          k2_stream_offset = new_pdf.get_first_stream_offset()
  
          new_pdf.file_offset = offset
          if self.acrobat_compatibility:
              new_pdf.file_offset = new_pdf.file_offset + 1
          pdf_buffer = new_pdf.get_build_buffer()
          j2 = pdf_buffer[k2_stream_offset + size_k2_stream:]
  
          if self.acrobat_compatibility:
              new_zip.add_data_to_file(b'\x00', j2, True)
          else:
              new_zip.add_data_to_file(b'', j2, True)
  
          return new_zip.buffer
  
      def get_pdf_offset(self, zipfile):
  
          f = open(zipfile, "rb")
          data = f.read()
          return data.find(b"%PDF")
  
      def generate(self):
  
          zip_stream_size = self.get_rebuild_zip_first_part_size()
          pdf_header = self.get_pdf_header()
          pdf_header = (pdf_header +
                        b'1 0 obj\n<<\n/Filter /FlateDecode\n/Length ' +
                        str(zip_stream_size).encode("utf-8") +
                        b'\n>>\nstream\n')
  
          filename = tempfile.mkstemp()[1]
          logging.info("use tmp file for new zip: " + filename)
          self.generate_zip_with_pdf_part(filename, pdf_header)
  
          pdf_offset = self.get_pdf_offset(filename)
  
          self.buffer = self.get_rebuild_pdf(filename, pdf_offset)
  