Compare documents and show diff in PDF with PyUNO

This script compares two Word documents with OpenOffice via the PyUNO Bridge and shows the differents in PDF file. The PDF result is the original Word document with highlighted diffs. This script came from http://mithrandr.moria.org/blog/447.html.

Before you run this script in the OpenOffice program directory with the python.bat you should start OpenOffice in server mode like:

soffice -headless -invisible '-accept=socket,host=localhost,port=2002;urp;
#!/usr/bin/env python

import uno
from com.sun.star.beans import PropertyValue

url = uno.systemPathToFileUrl('d:\\changed_document.doc')
url_original = uno.systemPathToFileUrl('d:\\original_document.doc')
url_save = uno.systemPathToFileUrl('d:\\the_diff.pdf')

### Get Service Manager
context = uno.getComponentContext()
resolver = context.ServiceManager.createInstanceWithContext("com.sun.star.bridge.UnoUrlResolver", context)
ctx = resolver.resolve("uno:socket,host=localhost,port=2002;urp;StarOffice.ComponentContext")
smgr = ctx.ServiceManager

### Load document

properties = []
p = PropertyValue()
p.Name = "Hidden"
p.Value = True
properties.append(p)
properties = tuple(properties)

desktop = smgr.createInstanceWithContext("com.sun.star.frame.Desktop", ctx)
doc = desktop.loadComponentFromURL(url, "_blank", 0, properties)

### Compare with original document
properties = []
p = PropertyValue()
p.Name = "URL"
p.Value = url_original
properties.append(p)
properties = tuple(properties)

dispatch_helper = smgr.createInstanceWithContext("com.sun.star.frame.DispatchHelper", ctx)
dispatch_helper.executeDispatch(doc.getCurrentController().getFrame(), ".uno:CompareDocuments", "", 0, properties)

### Save File
properties = []
p = PropertyValue()
p.Name = "Overwrite"
p.Value = True
properties.append(p)
p = PropertyValue()
p.Name = "FilterName"
p.Value = 'writer_pdf_Export'
properties.append(p)
properties = tuple(properties)

doc.storeToURL(url_save, properties)
doc.dispose()

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