91 lines
4.1 KiB
Python
91 lines
4.1 KiB
Python
from __future__ import absolute_import, division, unicode_literals
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from . import _base
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from ..constants import cdataElements, rcdataElements, voidElements
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from ..constants import spaceCharacters
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spaceCharacters = "".join(spaceCharacters)
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class LintError(Exception):
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pass
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class Filter(_base.Filter):
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def __iter__(self):
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open_elements = []
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contentModelFlag = "PCDATA"
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for token in _base.Filter.__iter__(self):
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type = token["type"]
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if type in ("StartTag", "EmptyTag"):
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name = token["name"]
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if contentModelFlag != "PCDATA":
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raise LintError("StartTag not in PCDATA content model flag: %(tag)s" % {"tag": name})
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if not isinstance(name, str):
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raise LintError("Tag name is not a string: %(tag)r" % {"tag": name})
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if not name:
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raise LintError("Empty tag name")
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if type == "StartTag" and name in voidElements:
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raise LintError("Void element reported as StartTag token: %(tag)s" % {"tag": name})
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elif type == "EmptyTag" and name not in voidElements:
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raise LintError("Non-void element reported as EmptyTag token: %(tag)s" % {"tag": token["name"]})
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if type == "StartTag":
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open_elements.append(name)
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for name, value in token["data"]:
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if not isinstance(name, str):
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raise LintError("Attribute name is not a string: %(name)r" % {"name": name})
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if not name:
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raise LintError("Empty attribute name")
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if not isinstance(value, str):
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raise LintError("Attribute value is not a string: %(value)r" % {"value": value})
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if name in cdataElements:
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contentModelFlag = "CDATA"
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elif name in rcdataElements:
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contentModelFlag = "RCDATA"
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elif name == "plaintext":
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contentModelFlag = "PLAINTEXT"
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elif type == "EndTag":
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name = token["name"]
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if not isinstance(name, str):
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raise LintError("Tag name is not a string: %(tag)r" % {"tag": name})
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if not name:
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raise LintError("Empty tag name")
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if name in voidElements:
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raise LintError("Void element reported as EndTag token: %(tag)s" % {"tag": name})
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start_name = open_elements.pop()
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if start_name != name:
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raise LintError("EndTag (%(end)s) does not match StartTag (%(start)s)" % {"end": name, "start": start_name})
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contentModelFlag = "PCDATA"
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elif type == "Comment":
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if contentModelFlag != "PCDATA":
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raise LintError("Comment not in PCDATA content model flag")
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elif type in ("Characters", "SpaceCharacters"):
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data = token["data"]
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if not isinstance(data, str):
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raise LintError("Attribute name is not a string: %(name)r" % {"name": data})
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if not data:
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raise LintError("%(type)s token with empty data" % {"type": type})
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if type == "SpaceCharacters":
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data = data.strip(spaceCharacters)
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if data:
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raise LintError("Non-space character(s) found in SpaceCharacters token: %(token)r" % {"token": data})
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elif type == "Doctype":
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name = token["name"]
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if contentModelFlag != "PCDATA":
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raise LintError("Doctype not in PCDATA content model flag: %(name)s" % {"name": name})
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if not isinstance(name, str):
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raise LintError("Tag name is not a string: %(tag)r" % {"tag": name})
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# XXX: what to do with token["data"] ?
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elif type in ("ParseError", "SerializeError"):
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pass
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else:
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raise LintError("Unknown token type: %(type)s" % {"type": type})
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yield token
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