Remove pre-rendered versions of images and subdocuments in LibreOffice Documents

remove_object_replacements.py

import zipfile
import re
import sys

"""
<draw:image xlink:href="Pictures/1000000100000538000005385B1FE860.png" xlink:type="simple" xlink:show="embed" xlink:actuate="onLoad" draw:mime-type="image/png"/>
<draw:image xlink:href="./ObjectReplacements/Object 1" xlink:type="simple" xlink:show="embed" xlink:actuate="onLoad"/>
"""

regex = re.compile('<draw:image[^>]*(png|ObjectReplacements)[^>]*>')

def remove_pattern_from_zip(input_zip, output_zip):
    with zipfile.ZipFile(input_zip, 'r') as zip_in:
        with zipfile.ZipFile(output_zip, 'w') as zip_out:
            for item in zip_in.infolist():
                if 'ObjectReplacements' in item.filename or '.png' in item.filename:
                    continue
                content = zip_in.read(item.filename)
                
                if item.filename.endswith('.xml'):
                    text_content = content.decode('utf-8')
                    modified_content = regex.sub('', text_content)
                    zip_out.writestr(item, modified_content.encode('utf-8'))
                else:
                    zip_out.writestr(item, content)

if __name__ == "__main__":
    if len(sys.argv) != 3:
        print("Usage: python remove_thumbnails.py <input_zip> <output_zip>")
        sys.exit(1)
    
    input_file = sys.argv[1]
    output_file = sys.argv[2]
    
    remove_pattern_from_zip(input_file, output_file)
    print(f"Processed zip saved to: {output_file}")