Locator for use with the ExpatParser class. This uses a weak reference to the parser object to avoid creating a circular reference between the parser and the content handler.
| 43 | # --- ExpatLocator |
| 44 | |
| 45 | class ExpatLocator(xmlreader.Locator): |
| 46 | """Locator for use with the ExpatParser class. |
| 47 | |
| 48 | This uses a weak reference to the parser object to avoid creating |
| 49 | a circular reference between the parser and the content handler. |
| 50 | """ |
| 51 | def __init__(self, parser): |
| 52 | self._ref = _mkproxy(parser) |
| 53 | |
| 54 | def getColumnNumber(self): |
| 55 | parser = self._ref |
| 56 | if parser._parser is None: |
| 57 | return None |
| 58 | return parser._parser.ErrorColumnNumber |
| 59 | |
| 60 | def getLineNumber(self): |
| 61 | parser = self._ref |
| 62 | if parser._parser is None: |
| 63 | return 1 |
| 64 | return parser._parser.ErrorLineNumber |
| 65 | |
| 66 | def getPublicId(self): |
| 67 | parser = self._ref |
| 68 | if parser is None: |
| 69 | return None |
| 70 | return parser._source.getPublicId() |
| 71 | |
| 72 | def getSystemId(self): |
| 73 | parser = self._ref |
| 74 | if parser is None: |
| 75 | return None |
| 76 | return parser._source.getSystemId() |
| 77 | |
| 78 | |
| 79 | # --- ExpatParser |