def __invoke_callback(self, page_generator, element, callback):
try:
callback(page_generator, element)
except ReplaceWithNothing as exc:
# Remove the element
element.parentNode.removeChild(element)
except ReplaceWithText as exc:
# Replace the element with the given text
text_node = element.ownerDocument.createTextNode(exc.text)
element.parentNode.replaceChild(text_node, element)
except ReplaceWithNode as exc:
# Replace the element with the given node
new_node = exc.node
if new_node.ownerDocument is not element.ownerDocument:
new_node = element.ownerDocument.importNode(new_node, True)
element.parentNode.replaceChild(new_node, element)
if exc.fix_namespaces:
# page_generator.content uses HTML without specifying a namespace
substitute_namespaces(new_node, {XHTML_NAMESPACE: EMPTY_NAMESPACE})
normalize_namespaces(new_node, strip_dups=True)
except ReplaceWithHTML as exc:
#
# Replace the element with the given HTML code
#
# Parse with TagSoupToXml
p = TagSoupToXml(omit_comments=exc.omit_comments)
p.feed(exc.html)
p.close()
# Get a DOM document
doc = p.todocument()
# Find the <body> element
for node in doc.documentElement.childNodes:
if node.nodeType != node.ELEMENT_NODE:
continue
if node.localName == 'body':
bodyElement = node
break
else:
raise AssertionError("<body> element not found")
# At this stage, HTML code doesn't have a namespace assigned yet.
assert bodyElement.namespaceURI == EMPTY_NAMESPACE
# Replace the placeholder element with the children of the <body> node.
for node in bodyElement.childNodes:
new_node = element.ownerDocument.importNode(node, True)
element.parentNode.insertBefore(new_node, element)
element.parentNode.removeChild(element)
def load_content(self):
self.invoke_filters('load_content:before')
# Convert HTML tag soup to XML
p = TagSoupToXml(omit_comments=True) # Omit commented-out parts in the final output
p.feed(open(self.path_info.source_filename, "rt", encoding="UTF-8").read()) # TODO: support other encodings? (is that safe?)
p.close()
# Return a DOM URL
self.content = p.todocument()
# Drop any "http://www.w3.org/1999/xhtml" namespace declarations
substitute_namespaces(self.content.documentElement, {XHTML_NAMESPACE: EMPTY_NAMESPACE})
normalize_namespaces(self.content.documentElement, strip_dups=True)
self.invoke_filters('load_content:after')
