Initial import

ebook_converter/ebooks/oeb/polish/opf.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python2
+# vim:fileencoding=utf-8
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+__license__ = 'GPL v3'
+__copyright__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
+
+from lxml import etree
+
+from calibre.ebooks.oeb.polish.container import OPF_NAMESPACES
+from calibre.utils.localization import canonicalize_lang
+
+
+def get_book_language(container):
+    for lang in container.opf_xpath('//dc:language'):
+        raw = lang.text
+        if raw:
+            code = canonicalize_lang(raw.split(',')[0].strip())
+            if code:
+                return code
+
+
+def set_guide_item(container, item_type, title, name, frag=None):
+    ref_tag = '{%s}reference' % OPF_NAMESPACES['opf']
+    href = None
+    if name:
+        href = container.name_to_href(name, container.opf_name)
+        if frag:
+            href += '#' + frag
+
+    guides = container.opf_xpath('//opf:guide')
+    if not guides and href:
+        g = container.opf.makeelement('{%s}guide' % OPF_NAMESPACES['opf'], nsmap={'opf':OPF_NAMESPACES['opf']})
+        container.insert_into_xml(container.opf, g)
+        guides = [g]
+
+    for guide in guides:
+        matches = []
+        for child in guide.iterchildren(etree.Element):
+            if child.tag == ref_tag and child.get('type', '').lower() == item_type.lower():
+                matches.append(child)
+        if not matches and href:
+            r = guide.makeelement(ref_tag, type=item_type, nsmap={'opf':OPF_NAMESPACES['opf']})
+            container.insert_into_xml(guide, r)
+            matches.append(r)
+        for m in matches:
+            if href:
+                m.set('title', title), m.set('href', href), m.set('type', item_type)
+            else:
+                container.remove_from_xml(m)
+    container.dirty(container.opf_name)
+