def diff(old_html, new_html, cutoff=0.0, plaintext=False, pretty=False):
"""Show the differences between the old and new html document, as html.
Return the document html with extra tags added to show changes. Add <ins>
tags around newly added sections, and <del> tags to show sections that have
been deleted.
"""
if plaintext:
old_dom = parse_text(old_html)
new_dom = parse_text(new_html)
else:
old_dom = parse_minidom(old_html)
new_dom = parse_minidom(new_html)
# If the two documents are not similar enough, don't show the changes.
if not check_text_similarity(old_dom, new_dom, cutoff):
return "<h2>The differences from the previous version are too large to " "show concisely.</h2>"
dom = dom_diff(old_dom, new_dom)
# HTML-specific cleanup.
if not plaintext:
fix_lists(dom)
fix_tables(dom)
# Only return html for the document body contents.
body_elements = dom.getElementsByTagName("body")
if len(body_elements) == 1:
dom = body_elements[0]
return minidom_tostring(dom, pretty=pretty)
def diff(old_html, new_html, cutoff=0.0, plaintext=False, pretty=False):
"""Show the differences between the old and new html document, as html.
Return the document html with extra tags added to show changes. Add <ins>
tags around newly added sections, and <del> tags to show sections that have
been deleted.
"""
if plaintext:
old_dom = parse_text(old_html)
new_dom = parse_text(new_html)
else:
old_dom = parse_minidom(old_html)
new_dom = parse_minidom(new_html)
# If the two documents are not similar enough, don't show the changes.
if not check_text_similarity(old_dom, new_dom, cutoff):
return (
'<h2>The differences from the previous version are too large to '
'show concisely.</h2>')
dom = dom_diff(old_dom, new_dom)
# HTML-specific cleanup.
if not plaintext:
fix_lists(dom)
fix_tables(dom)
# Only return html for the document body contents.
body_elements = dom.getElementsByTagName('body')
if len(body_elements) == 1:
dom = body_elements[0]
return minidom_tostring(dom, pretty=pretty)
def test_xml_diff():
for test_name, old_html, new_html, target in test_cases:
old_dom = parse_minidom(old_html, strict_xml=True)
new_dom = parse_minidom(new_html, strict_xml=True)
changes_xml = minidom_tostring(dom_diff(old_dom, new_dom))
assert_equal(changes_xml, target)
def test_xml_diff():
for test_name, old_html, new_html, target in test_cases:
old_dom = parse_minidom(old_html, strict_xml=True)
new_dom = parse_minidom(new_html, strict_xml=True)
changes_xml = minidom_tostring(dom_diff(old_dom, new_dom))
assert_equal(changes_xml, target)