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Commit461bda3

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willkggsnedders
authored andcommitted
First pass at documenting serializer (#376)
1 parented8e017 commit461bda3

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‎html5lib/serializer.py

Lines changed: 119 additions & 44 deletions
Original file line numberDiff line numberDiff line change
@@ -68,10 +68,33 @@ def htmlentityreplace_errors(exc):
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else:
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returnxmlcharrefreplace_errors(exc)
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register_error("htmlentityreplace",htmlentityreplace_errors)
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defserialize(input,tree="etree",encoding=None,**serializer_opts):
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"""Serializes the input token stream using the specified treewalker
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:arg input: the token stream to serialize
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:arg tree: the treewalker to use
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:arg encoding: the encoding to use
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:arg serializer_opts: any options to pass to the
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:py:class:`html5lib.serializer.HTMLSerializer` that gets created
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:returns: the tree serialized as a string
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Example:
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>>> from html5lib.html5parser import parse
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>>> from html5lib.serializer import serialize
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>>> token_stream = parse('<html><body><p>Hi!</p></body></html>')
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>>> serialize(token_stream, omit_optional_tags=False)
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'<html><head></head><body><p>Hi!</p></body></html>'
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"""
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# XXX: Should we cache this?
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walker=treewalkers.getTreeWalker(tree)
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s=HTMLSerializer(**serializer_opts)
@@ -110,50 +133,83 @@ class HTMLSerializer(object):
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"strip_whitespace","sanitize")
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def__init__(self,**kwargs):
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"""Initialize HTMLSerializer.
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Keyword options (default given first unless specified) include:
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inject_meta_charset=True|False
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Whether it insert a meta element to define the character set of the
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document.
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quote_attr_values="legacy"|"spec"|"always"
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Whether to quote attribute values that don't require quoting
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per legacy browser behaviour, when required by the standard, or always.
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quote_char=u'"'|u"'"
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Use given quote character for attribute quoting. Default is to
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use double quote unless attribute value contains a double quote,
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in which case single quotes are used instead.
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escape_lt_in_attrs=False|True
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Whether to escape < in attribute values.
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escape_rcdata=False|True
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Whether to escape characters that need to be escaped within normal
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elements within rcdata elements such as style.
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resolve_entities=True|False
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Whether to resolve named character entities that appear in the
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source tree. The XML predefined entities &lt; &gt; &amp; &quot; &apos;
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are unaffected by this setting.
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strip_whitespace=False|True
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Whether to remove semantically meaningless whitespace. (This
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compresses all whitespace to a single space except within pre.)
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minimize_boolean_attributes=True|False
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Shortens boolean attributes to give just the attribute value,
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for example <input disabled="disabled"> becomes <input disabled>.
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use_trailing_solidus=False|True
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Includes a close-tag slash at the end of the start tag of void
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elements (empty elements whose end tag is forbidden). E.g. <hr/>.
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space_before_trailing_solidus=True|False
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Places a space immediately before the closing slash in a tag
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using a trailing solidus. E.g. <hr />. Requires use_trailing_solidus.
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sanitize=False|True
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Strip all unsafe or unknown constructs from output.
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See `html5lib user documentation`_
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omit_optional_tags=True|False
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Omit start/end tags that are optional.
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alphabetical_attributes=False|True
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Reorder attributes to be in alphabetical order.
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.. _html5lib user documentation: http://code.google.com/p/html5lib/wiki/UserDocumentation
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"""Initialize HTMLSerializer
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:arg inject_meta_charset: Whether or not to inject the meta charset.
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Defaults to ``True``.
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:arg quote_attr_values: Whether to quote attribute values that don't
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require quoting per legacy browser behavior (``"legacy"``), when
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required by the standard (``"spec"``), or always (``"always"``).
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Defaults to ``"legacy"``.
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:arg quote_char: Use given quote character for attribute quoting.
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Defaults to ``"`` which will use double quotes unless attribute
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value contains a double quote, in which case single quotes are
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used.
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:arg escape_lt_in_attrs: Whether or not to escape ``<`` in attribute
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values.
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Defaults to ``False``.
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:arg escape_rcdata: Whether to escape characters that need to be
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escaped within normal elements within rcdata elements such as
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style.
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Defaults to ``False``.
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:arg resolve_entities: Whether to resolve named character entities that
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appear in the source tree. The XML predefined entities &lt; &gt;
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&amp; &quot; &apos; are unaffected by this setting.
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Defaults to ``True``.
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:arg strip_whitespace: Whether to remove semantically meaningless
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whitespace. (This compresses all whitespace to a single space
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except within ``pre``.)
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Defaults to ``False``.
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:arg minimize_boolean_attributes: Shortens boolean attributes to give
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just the attribute value, for example::
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<input disabled="disabled">
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becomes::
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<input disabled>
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Defaults to ``True``.
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:arg use_trailing_solidus: Includes a close-tag slash at the end of the
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start tag of void elements (empty elements whose end tag is
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forbidden). E.g. ``<hr/>``.
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Defaults to ``False``.
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:arg space_before_trailing_solidus: Places a space immediately before
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the closing slash in a tag using a trailing solidus. E.g.
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``<hr />``. Requires ``use_trailing_solidus=True``.
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Defaults to ``True``.
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:arg sanitize: Strip all unsafe or unknown constructs from output.
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See :py:class:`html5lib.filters.sanitizer.Filter`.
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Defaults to ``False``.
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:arg omit_optional_tags: Omit start/end tags that are optional.
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Defaults to ``True``.
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:arg alphabetical_attributes: Reorder attributes to be in alphabetical order.
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Defaults to ``False``.
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"""
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unexpected_args=frozenset(kwargs)-frozenset(self.options)
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iflen(unexpected_args)>0:
@@ -317,6 +373,25 @@ def serialize(self, treewalker, encoding=None):
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self.serializeError(token["data"])
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defrender(self,treewalker,encoding=None):
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"""Serializes the stream from the treewalker into a string
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:arg treewalker: the treewalker to serialize
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:arg encoding: the string encoding to use
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:returns: the serialized tree
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Example:
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>>> from html5lib import parse, getTreeWalker
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>>> from html5lib.serializer import HTMLSerializer
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>>> token_stream = parse('<html><body>Hi!</body></html>')
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>>> walker = getTreeWalker('etree')
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>>> serializer = HTMLSerializer(omit_optional_tags=False)
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>>> serializer.render(walker(token_stream))
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'<html><head></head><body>Hi!</body></html>'
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"""
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ifencoding:
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returnb"".join(list(self.serialize(treewalker,encoding)))
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else:

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