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"""L10N file handler for Python.
Exported classes:
L10NHandler - L10N file handler.
"""
import xml.sax.handler
class L10NHandler(xml.sax.handler.ContentHandler):
"""Class for receiving logical L10N content events.
It supports L10N entities as defined in the following file:
xml/l10n.dtd
The order of event in this class mirrors the order of the information in
the document.
"""
def __init__(self):
"""Creates an instance of the L10NHandler class.
The function set the object attributes with default values.
"""
self.msgDict = {}
self.msgid = ""
self.inMsgid = False
self.msg = ""
self.msgLang =""
self.inMsg = False
def startElement(self, name, attributes):
"""Signals the start of an element.
The function set a variable depending on the element and the
attribut.
Parameters:
name - contains the raw CML name of the element type as a string.
attributes - contains an instance of the Attributes class.
"""
if name == "msgid":
self.inMsgid = True
if name == "msg":
if 'xml:lang' in attributes:
self.msgLang = attributes["xml:lang"]
else:
self.msgLang = "en"
self.inMsg = True
def characters(self, data):
"""Receives notification of character data.
The parser will call this method to report each chunk of character
data.
Parameters:
data - contains the chunk of character data.
"""
if self.inMsgid:
self.msgid += data
if self.inMsg:
self.msg += data
def endElement(self,name):
"""Signals the end of an element in non-namespace mode.
Parameters:
name - contains the name of the element type.
"""
if name == "msgid":
self.inMsgid = False
self.msgDict[self.msgid] = {}
if name == "msg":
self.inMsg = False
self.msgDict[self.msgid][self.msgLang] = self.msg
self.msgLang = ""
self.msg = ""
if name == "msgset":
self.msgid = ""
def translate(self, msgid, lang):
"""Translates a string
Parameters:
msgid - contains the msgid to translate.
lang - contains the destination language.
Returns:
a string - either the translated string if the translation is
available or the msgid in other cases.
"""
if msgid in self.msgDict and lang in self.msgDict[msgid]:
return self.msgDict[msgid][lang]
else:
return msgid
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