+
+def add_anchor(element, prefix, with_link=True, with_target=True, link_text=None):
+ if with_link:
+ if link_text is None:
+ link_text = prefix
+ anchor = etree.Element('a', href='#%s' % prefix)
+ anchor.set('class', 'anchor')
+ anchor.text = unicode(link_text)
+ if element.text:
+ anchor.tail = element.text
+ element.text = u''
+ element.insert(0, anchor)
+
+ if with_target:
+ anchor_target = etree.Element('a', name='%s' % prefix)
+ anchor_target.set('class', 'target')
+ anchor_target.text = u' '
+ if element.text:
+ anchor_target.tail = element.text
+ element.text = u''
+ element.insert(0, anchor_target)
+
+
+def any_ancestor(element, test):
+ for ancestor in element.iterancestors():
+ if test(ancestor):
+ return True
+ return False
+
+
+def add_anchors(root):
+ counter = 1
+ for element in root.iterdescendants():
+ if any_ancestor(element, lambda e: e.get('class') in ('note', 'motto', 'motto_podpis', 'dedication')
+ or e.tag == 'blockquote'):
+ continue
+
+ if element.tag == 'p' and 'verse' in element.get('class', ''):
+ if counter == 1 or counter % 5 == 0:
+ add_anchor(element, "f%d" % counter, link_text=counter)
+ counter += 1
+ elif 'paragraph' in element.get('class', ''):
+ add_anchor(element, "f%d" % counter, link_text=counter)
+ counter += 1
+
+
+def add_table_of_contents(root):
+ sections = []
+ counter = 1
+ for element in root.iterdescendants():
+ if element.tag in ('h2', 'h3'):
+ if any_ancestor(element, lambda e: e.get('id') in ('footnotes',) or e.get('class') in ('person-list',)):
+ continue
+
+ if element.tag == 'h3' and len(sections) and sections[-1][1] == 'h2':
+ sections[-1][3].append((counter, element.tag, ''.join(element.xpath('text()')), []))
+ else:
+ sections.append((counter, element.tag, ''.join(element.xpath('text()')), []))
+ add_anchor(element, "s%d" % counter, with_link=False)
+ counter += 1
+
+ toc = etree.Element('div')
+ toc.set('id', 'toc')
+ toc_header = etree.SubElement(toc, 'h2')
+ toc_header.text = u'Spis treści'
+ toc_list = etree.SubElement(toc, 'ol')
+
+ for n, section, text, subsections in sections:
+ section_element = etree.SubElement(toc_list, 'li')
+ add_anchor(section_element, "s%d" % n, with_target=False, link_text=text)
+
+ if len(subsections):
+ subsection_list = etree.SubElement(section_element, 'ol')
+ for n, subsection, text, _ in subsections:
+ subsection_element = etree.SubElement(subsection_list, 'li')
+ add_anchor(subsection_element, "s%d" % n, with_target=False, link_text=text)
+
+ root.insert(0, toc)
+