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Improve Python-attribute access of metadata XML-attributes.

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This commit is contained in:
Marshall T. Vandegrift 2009-01-31 11:01:31 -05:00
parent d50de0b76c
commit 53cbe4814d
1 changed files with 20 additions and 17 deletions
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33
src/calibre/ebooks/oeb/base.py
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@ -52,6 +52,8 @@ def XML(name): return '{%s}%s' % (XML_NS, name)
def XHTML(name): return '{%s}%s' % (XHTML_NS, name) def XHTML(name): return '{%s}%s' % (XHTML_NS, name)
def OPF(name): return '{%s}%s' % (OPF2_NS, name) def OPF(name): return '{%s}%s' % (OPF2_NS, name)
def DC(name): return '{%s}%s' % (DC11_NS, name) def DC(name): return '{%s}%s' % (DC11_NS, name)
def XSI(name): return '{%s}%s' % (XSI_NS, name)
def DCTERMS(name): return '{%s}%s' % (DCTERMS_NS, name)
def NCX(name): return '{%s}%s' % (NCX_NS, name) def NCX(name): return '{%s}%s' % (NCX_NS, name)
def SVG(name): return '{%s}%s' % (SVG_NS, name) def SVG(name): return '{%s}%s' % (SVG_NS, name)
def XLINK(name): return '{%s}%s' % (XLINK_NS, name) def XLINK(name): return '{%s}%s' % (XLINK_NS, name)
@ -211,11 +213,14 @@ class DirWriter(object):
class Metadata(object): class Metadata(object):
DC_TERMS = set(['contributor', 'coverage', 'creator', 'date', 'description', DC_TERMS = set(['contributor', 'coverage', 'creator', 'date',
'format', 'identifier', 'language', 'publisher', 'relation', 'description', 'format', 'identifier', 'language',
'rights', 'source', 'subject', 'title', 'type']) 'publisher', 'relation', 'rights', 'source', 'subject',
'title', 'type'])
CALIBRE_TERMS = set(['series', 'series_index', 'rating']) CALIBRE_TERMS = set(['series', 'series_index', 'rating'])
OPF_ATTRS = set(['role', 'file-as', 'scheme', 'event']) OPF_ATTRS = {'role': OPF('role'), 'file-as': OPF('file-as'),
'scheme': OPF('scheme'), 'event': OPF('event'),
'type': XSI('type'), 'id': 'id'}
OPF1_NSMAP = {'dc': DC11_NS, 'oebpackage': OPF1_NS} OPF1_NSMAP = {'dc': DC11_NS, 'oebpackage': OPF1_NS}
OPF2_NSMAP = {'opf': OPF2_NS, 'dc': DC11_NS, 'dcterms': DCTERMS_NS, OPF2_NSMAP = {'opf': OPF2_NS, 'dc': DC11_NS, 'dcterms': DCTERMS_NS,
'xsi': XSI_NS, 'calibre': CALIBRE_NS} 'xsi': XSI_NS, 'calibre': CALIBRE_NS}
@ -240,26 +245,24 @@ class Metadata(object):
for attr, value in attrib.items(): for attr, value in attrib.items():
if isprefixname(value): if isprefixname(value):
attrib[attr] = qname(value, nsmap) attrib[attr] = qname(value, nsmap)
if attr in Metadata.OPF_ATTRS: nsattr = Metadata.OPF_ATTRS.get(attr, attr)
attrib[OPF(attr)] = attrib.pop(attr) if attr != nsattr:
attrib[nsattr] = attrib.pop(attr)
self.__setattr__ = self._setattr self.__setattr__ = self._setattr
def __getattr__(self, name): def __getattr__(self, name):
attr = name.replace('_', '-') attr = name.replace('_', '-')
if attr in Metadata.OPF_ATTRS: if attr in Metadata.OPF_ATTRS:
attr = OPF(attr) attr = Metadata.OPF_ATTRS[attr]
try: return self.attrib.get(attr, None)
return self.attrib[attr] raise AttributeError(
except KeyError: '%r object has no attribute %r' \
raise AttributeError( % (self.__class__.__name__, name))
'%r object has no attribute %r' \
% (self.__class__.__name__, name))
def _setattr(self, name, value): def _setattr(self, name, value):
attr = name.replace('_', '-') attr = name.replace('_', '-')
if attr in Metadata.OPF_ATTRS: if attr in Metadata.OPF_ATTRS:
attr = OPF(attr) attr = Metadata.OPF_ATTRS[attr]
if attr in self.attrib:
self.attrib[attr] = value self.attrib[attr] = value
return return
super(Item, self).__setattr__(self, name, value) super(Item, self).__setattr__(self, name, value)