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-rw-r--r--src/beautifulsoup/element.py851
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diff --git a/src/beautifulsoup/element.py b/src/beautifulsoup/element.py
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--- a/src/beautifulsoup/element.py
+++ /dev/null
@@ -1,851 +0,0 @@
-import re
-import types
-try:
- from htmlentitydefs import name2codepoint
-except ImportError:
- name2codepoint = {}
-
-from util import isString, isList
-
-DEFAULT_OUTPUT_ENCODING = "utf-8"
-
-class Entities:
- """A mixin class that knows about XML entities."""
-
- HTML_ENTITIES = "html"
- XML_ENTITIES = "xml"
- XHTML_ENTITIES = "xhtml"
-
- def _invert(h):
- "Cheap function to invert a hash."
- i = {}
- for k,v in h.items():
- i[v] = k
- return i
-
- XML_ENTITIES_TO_SPECIAL_CHARS = { "apos" : "'",
- "quot" : '"',
- "amp" : "&",
- "lt" : "<",
- "gt" : ">" }
-
- XML_SPECIAL_CHARS_TO_ENTITIES = _invert(XML_ENTITIES_TO_SPECIAL_CHARS)
-
-class PageElement:
- """Contains the navigational information for some part of the page
- (either a tag or a piece of text)"""
-
- def setup(self, parent=None, previous=None):
- """Sets up the initial relations between this element and
- other elements."""
- self.parent = parent
- self.previous = previous
- self.next = None
- self.previousSibling = None
- self.nextSibling = None
- if self.parent and self.parent.contents:
- self.previousSibling = self.parent.contents[-1]
- self.previousSibling.nextSibling = self
-
- def replaceWith(self, replaceWith):
- oldParent = self.parent
- myIndex = self.parent.contents.index(self)
- if hasattr(replaceWith, 'parent') and replaceWith.parent == self.parent:
- # We're replacing this element with one of its siblings.
- index = self.parent.contents.index(replaceWith)
- if index and index < myIndex:
- # Furthermore, it comes before this element. That
- # means that when we extract it, the index of this
- # element will change.
- myIndex = myIndex - 1
- self.extract()
- oldParent.insert(myIndex, replaceWith)
-
- def extract(self):
- """Destructively rips this element out of the tree."""
- if self.parent:
- try:
- self.parent.contents.remove(self)
- except ValueError:
- pass
-
- #Find the two elements that would be next to each other if
- #this element (and any children) hadn't been parsed. Connect
- #the two.
- lastChild = self._lastRecursiveChild()
- nextElement = lastChild.next
-
- if self.previous:
- self.previous.next = nextElement
- if nextElement:
- nextElement.previous = self.previous
- self.previous = None
- lastChild.next = None
-
- self.parent = None
- if self.previousSibling:
- self.previousSibling.nextSibling = self.nextSibling
- if self.nextSibling:
- self.nextSibling.previousSibling = self.previousSibling
- self.previousSibling = self.nextSibling = None
- return self
-
- def _lastRecursiveChild(self):
- "Finds the last element beneath this object to be parsed."
- lastChild = self
- while hasattr(lastChild, 'contents') and lastChild.contents:
- lastChild = lastChild.contents[-1]
- return lastChild
-
- def insert(self, position, newChild):
- if (isinstance(newChild, basestring)
- or isinstance(newChild, unicode)) \
- and not isinstance(newChild, NavigableString):
- newChild = NavigableString(newChild)
-
- position = min(position, len(self.contents))
- if hasattr(newChild, 'parent') and newChild.parent != None:
- # We're 'inserting' an element that's already one
- # of this object's children.
- if newChild.parent == self:
- index = self.find(newChild)
- if index and index < position:
- # Furthermore we're moving it further down the
- # list of this object's children. That means that
- # when we extract this element, our target index
- # will jump down one.
- position = position - 1
- newChild.extract()
-
- newChild.parent = self
- previousChild = None
- if position == 0:
- newChild.previousSibling = None
- newChild.previous = self
- else:
- previousChild = self.contents[position-1]
- newChild.previousSibling = previousChild
- newChild.previousSibling.nextSibling = newChild
- newChild.previous = previousChild._lastRecursiveChild()
- if newChild.previous:
- newChild.previous.next = newChild
-
- newChildsLastElement = newChild._lastRecursiveChild()
-
- if position >= len(self.contents):
- newChild.nextSibling = None
-
- parent = self
- parentsNextSibling = None
- while not parentsNextSibling:
- parentsNextSibling = parent.nextSibling
- parent = parent.parent
- if not parent: # This is the last element in the document.
- break
- if parentsNextSibling:
- newChildsLastElement.next = parentsNextSibling
- else:
- newChildsLastElement.next = None
- else:
- nextChild = self.contents[position]
- newChild.nextSibling = nextChild
- if newChild.nextSibling:
- newChild.nextSibling.previousSibling = newChild
- newChildsLastElement.next = nextChild
-
- if newChildsLastElement.next:
- newChildsLastElement.next.previous = newChildsLastElement
- self.contents.insert(position, newChild)
-
- def append(self, tag):
- """Appends the given tag to the contents of this tag."""
- self.insert(len(self.contents), tag)
-
- def findNext(self, name=None, attrs={}, text=None, **kwargs):
- """Returns the first item that matches the given criteria and
- appears after this Tag in the document."""
- return self._findOne(self.findAllNext, name, attrs, text, **kwargs)
-
- def findAllNext(self, name=None, attrs={}, text=None, limit=None,
- **kwargs):
- """Returns all items that match the given criteria and appear
- after this Tag in the document."""
- return self._findAll(name, attrs, text, limit, self.nextGenerator,
- **kwargs)
-
- def findNextSibling(self, name=None, attrs={}, text=None, **kwargs):
- """Returns the closest sibling to this Tag that matches the
- given criteria and appears after this Tag in the document."""
- return self._findOne(self.findNextSiblings, name, attrs, text,
- **kwargs)
-
- def findNextSiblings(self, name=None, attrs={}, text=None, limit=None,
- **kwargs):
- """Returns the siblings of this Tag that match the given
- criteria and appear after this Tag in the document."""
- return self._findAll(name, attrs, text, limit,
- self.nextSiblingGenerator, **kwargs)
- fetchNextSiblings = findNextSiblings # Compatibility with pre-3.x
-
- def findPrevious(self, name=None, attrs={}, text=None, **kwargs):
- """Returns the first item that matches the given criteria and
- appears before this Tag in the document."""
- return self._findOne(self.findAllPrevious, name, attrs, text, **kwargs)
-
- def findAllPrevious(self, name=None, attrs={}, text=None, limit=None,
- **kwargs):
- """Returns all items that match the given criteria and appear
- before this Tag in the document."""
- return self._findAll(name, attrs, text, limit, self.previousGenerator,
- **kwargs)
- fetchPrevious = findAllPrevious # Compatibility with pre-3.x
-
- def findPreviousSibling(self, name=None, attrs={}, text=None, **kwargs):
- """Returns the closest sibling to this Tag that matches the
- given criteria and appears before this Tag in the document."""
- return self._findOne(self.findPreviousSiblings, name, attrs, text,
- **kwargs)
-
- def findPreviousSiblings(self, name=None, attrs={}, text=None,
- limit=None, **kwargs):
- """Returns the siblings of this Tag that match the given
- criteria and appear before this Tag in the document."""
- return self._findAll(name, attrs, text, limit,
- self.previousSiblingGenerator, **kwargs)
- fetchPreviousSiblings = findPreviousSiblings # Compatibility with pre-3.x
-
- def findParent(self, name=None, attrs={}, **kwargs):
- """Returns the closest parent of this Tag that matches the given
- criteria."""
- # NOTE: We can't use _findOne because findParents takes a different
- # set of arguments.
- r = None
- l = self.findParents(name, attrs, 1)
- if l:
- r = l[0]
- return r
-
- def findParents(self, name=None, attrs={}, limit=None, **kwargs):
- """Returns the parents of this Tag that match the given
- criteria."""
-
- return self._findAll(name, attrs, None, limit, self.parentGenerator,
- **kwargs)
- fetchParents = findParents # Compatibility with pre-3.x
-
- #These methods do the real heavy lifting.
-
- def _findOne(self, method, name, attrs, text, **kwargs):
- r = None
- l = method(name, attrs, text, 1, **kwargs)
- if l:
- r = l[0]
- return r
-
- def _findAll(self, name, attrs, text, limit, generator, **kwargs):
- "Iterates over a generator looking for things that match."
-
- if isinstance(name, SoupStrainer):
- strainer = name
- else:
- # Build a SoupStrainer
- strainer = SoupStrainer(name, attrs, text, **kwargs)
- results = ResultSet(strainer)
- g = generator()
- while True:
- try:
- i = g.next()
- except StopIteration:
- break
- if i:
- found = strainer.search(i)
- if found:
- results.append(found)
- if limit and len(results) >= limit:
- break
- return results
-
- #These Generators can be used to navigate starting from both
- #NavigableStrings and Tags.
- def nextGenerator(self):
- i = self
- while i:
- i = i.next
- yield i
-
- def nextSiblingGenerator(self):
- i = self
- while i:
- i = i.nextSibling
- yield i
-
- def previousGenerator(self):
- i = self
- while i:
- i = i.previous
- yield i
-
- def previousSiblingGenerator(self):
- i = self
- while i:
- i = i.previousSibling
- yield i
-
- def parentGenerator(self):
- i = self
- while i:
- i = i.parent
- yield i
-
- # Utility methods
- def substituteEncoding(self, str, encoding=None):
- encoding = encoding or "utf-8"
- return str.replace("%SOUP-ENCODING%", encoding)
-
- def toEncoding(self, s, encoding=None):
- """Encodes an object to a string in some encoding, or to Unicode.
- ."""
- if isinstance(s, unicode):
- if encoding:
- s = s.encode(encoding)
- elif isinstance(s, str):
- if encoding:
- s = s.encode(encoding)
- else:
- s = unicode(s)
- else:
- if encoding:
- s = self.toEncoding(str(s), encoding)
- else:
- s = unicode(s)
- return s
-
-class NavigableString(unicode, PageElement):
-
- def __new__(cls, value):
- """Create a new NavigableString.
-
- When unpickling a NavigableString, this method is called with
- the string in DEFAULT_OUTPUT_ENCODING. That encoding needs to be
- passed in to the superclass's __new__ or the superclass won't know
- how to handle non-ASCII characters.
- """
- if isinstance(value, unicode):
- return unicode.__new__(cls, value)
- return unicode.__new__(cls, value, DEFAULT_OUTPUT_ENCODING)
-
- def __getnewargs__(self):
- return (unicode(self),)
-
- def __getattr__(self, attr):
- """text.string gives you text. This is for backwards
- compatibility for Navigable*String, but for CData* it lets you
- get the string without the CData wrapper."""
- if attr == 'string':
- return self
- else:
- raise AttributeError, "'%s' object has no attribute '%s'" % (self.__class__.__name__, attr)
-
- def encode(self, encoding=DEFAULT_OUTPUT_ENCODING):
- return self.decode().encode(encoding)
-
- def decodeGivenEventualEncoding(self, eventualEncoding):
- return self
-
-class CData(NavigableString):
-
- def decodeGivenEventualEncoding(self, eventualEncoding):
- return u'<![CDATA[' + self + u']]>'
-
-class ProcessingInstruction(NavigableString):
-
- def decodeGivenEventualEncoding(self, eventualEncoding):
- output = self
- if u'%SOUP-ENCODING%' in output:
- output = self.substituteEncoding(output, eventualEncoding)
- return u'<?' + output + u'?>'
-
-class Comment(NavigableString):
- def decodeGivenEventualEncoding(self, eventualEncoding):
- return u'<!--' + self + u'-->'
-
-class Declaration(NavigableString):
- def decodeGivenEventualEncoding(self, eventualEncoding):
- return u'<!' + self + u'>'
-
-class Tag(PageElement, Entities):
-
- """Represents a found HTML tag with its attributes and contents."""
-
- def _convertEntities(self, builder, match):
- """Used in a call to re.sub to replace HTML, XML, and numeric
- entities with the appropriate Unicode characters. If HTML
- entities are being converted, any unrecognized entities are
- escaped."""
- x = match.group(1)
- if builder.convert_html_entities and x in name2codepoint:
- return unichr(name2codepoint[x])
- elif x in self.XML_ENTITIES_TO_SPECIAL_CHARS:
- if builder.convert_xml_entities:
- return self.XML_ENTITIES_TO_SPECIAL_CHARS[x]
- else:
- return u'&%s;' % x
- elif len(x) > 0 and x[0] == '#':
- # Handle numeric entities
- if len(x) > 1 and x[1] == 'x':
- return unichr(int(x[2:], 16))
- else:
- return unichr(int(x[1:]))
-
- elif self.escapeUnrecognizedEntities:
- return u'&amp;%s;' % x
- else:
- return u'&%s;' % x
-
- def __init__(self, parser, builder, name, attrs=None, parent=None,
- previous=None):
- "Basic constructor."
-
- # We don't actually store the parser object: that lets extracted
- # chunks be garbage-collected
- self.parserClass = parser.__class__
- self.name = name
- self.isSelfClosing = builder.isSelfClosingTag(name)
- if attrs == None:
- attrs = []
- if isinstance(attrs, types.DictType):
- self.attrMap = attrs
- self.attrs = attrs
- self.contents = []
- self.setup(parent, previous)
- self.hidden = False
- self.containsSubstitutions = False
- self.escapeUnrecognizedEntities = parser.escapeUnrecognizedEntities
-
- # Convert any HTML, XML, or numeric entities in the attribute values.
- convert_one = lambda x: self._convertEntities(parser.builder, x)
- def convert(kval):
- k, val = kval
- if val is None:
- return kval
- return (k, re.sub("&(#\d+|#x[0-9a-fA-F]+|\w+);", convert_one, val))
- if isinstance(attrs, types.DictType):
- self.attrs = [convert(kv) for kv in attrs.items()]
- else:
- self.attrs = map(convert, attrs)
-
- def get(self, key, default=None):
- """Returns the value of the 'key' attribute for the tag, or
- the value given for 'default' if it doesn't have that
- attribute."""
- return self._getAttrMap().get(key, default)
-
- def has_key(self, key):
- return self._getAttrMap().has_key(key)
-
- def __getitem__(self, key):
- """tag[key] returns the value of the 'key' attribute for the tag,
- and throws an exception if it's not there."""
- return self._getAttrMap()[key]
-
- def __iter__(self):
- "Iterating over a tag iterates over its contents."
- return iter(self.contents)
-
- def __len__(self):
- "The length of a tag is the length of its list of contents."
- return len(self.contents)
-
- def __contains__(self, x):
- return x in self.contents
-
- def __nonzero__(self):
- "A tag is non-None even if it has no contents."
- return True
-
- def __setitem__(self, key, value):
- """Setting tag[key] sets the value of the 'key' attribute for the
- tag."""
- self._getAttrMap()
- self.attrMap[key] = value
- found = False
- for i in range(0, len(self.attrs)):
- if self.attrs[i][0] == key:
- self.attrs[i] = (key, value)
- found = True
- if not found:
- self.attrs.append((key, value))
- self._getAttrMap()[key] = value
-
- def __delitem__(self, key):
- "Deleting tag[key] deletes all 'key' attributes for the tag."
- for item in self.attrs:
- if item[0] == key:
- self.attrs.remove(item)
- #We don't break because bad HTML can define the same
- #attribute multiple times.
- self._getAttrMap()
- if self.attrMap.has_key(key):
- del self.attrMap[key]
-
- def __call__(self, *args, **kwargs):
- """Calling a tag like a function is the same as calling its
- findAll() method. Eg. tag('a') returns a list of all the A tags
- found within this tag."""
- return apply(self.findAll, args, kwargs)
-
- def __getattr__(self, tag):
- #print "Getattr %s.%s" % (self.__class__, tag)
- if len(tag) > 3 and tag.rfind('Tag') == len(tag)-3:
- return self.find(tag[:-3])
- elif tag.find('__') != 0:
- return self.find(tag)
- raise AttributeError, "'%s' object has no attribute '%s'" % (self.__class__, tag)
-
- def __eq__(self, other):
- """Returns true iff this tag has the same name, the same attributes,
- and the same contents (recursively) as the given tag.
-
- NOTE: right now this will return false if two tags have the
- same attributes in a different order. Should this be fixed?"""
- if not hasattr(other, 'name') or not hasattr(other, 'attrs') or not hasattr(other, 'contents') or self.name != other.name or self.attrs != other.attrs or len(self) != len(other):
- return False
- for i in range(0, len(self.contents)):
- if self.contents[i] != other.contents[i]:
- return False
- return True
-
- def __ne__(self, other):
- """Returns true iff this tag is not identical to the other tag,
- as defined in __eq__."""
- return not self == other
-
- def __repr__(self, encoding=DEFAULT_OUTPUT_ENCODING):
- """Renders this tag as a string."""
- return self.decode(eventualEncoding=encoding)
-
- BARE_AMPERSAND_OR_BRACKET = re.compile("([<>]|"
- + "&(?!#\d+;|#x[0-9a-fA-F]+;|\w+;)"
- + ")")
-
- def _sub_entity(self, x):
- """Used with a regular expression to substitute the
- appropriate XML entity for an XML special character."""
- return "&" + self.XML_SPECIAL_CHARS_TO_ENTITIES[x.group(0)[0]] + ";"
-
- def __unicode__(self):
- return self.decode()
-
- def __str__(self):
- return self.encode()
-
- def encode(self, encoding=DEFAULT_OUTPUT_ENCODING,
- prettyPrint=False, indentLevel=0):
- return self.decode(prettyPrint, indentLevel, encoding).encode(encoding)
-
- def decode(self, prettyPrint=False, indentLevel=0,
- eventualEncoding=DEFAULT_OUTPUT_ENCODING):
- """Returns a string or Unicode representation of this tag and
- its contents. To get Unicode, pass None for encoding."""
-
- attrs = []
- if self.attrs:
- for key, val in self.attrs:
- fmt = '%s="%s"'
- if isString(val):
- if (self.containsSubstitutions
- and eventualEncoding is not None
- and '%SOUP-ENCODING%' in val):
- val = self.substituteEncoding(val, eventualEncoding)
-
- # The attribute value either:
- #
- # * Contains no embedded double quotes or single quotes.
- # No problem: we enclose it in double quotes.
- # * Contains embedded single quotes. No problem:
- # double quotes work here too.
- # * Contains embedded double quotes. No problem:
- # we enclose it in single quotes.
- # * Embeds both single _and_ double quotes. This
- # can't happen naturally, but it can happen if
- # you modify an attribute value after parsing
- # the document. Now we have a bit of a
- # problem. We solve it by enclosing the
- # attribute in single quotes, and escaping any
- # embedded single quotes to XML entities.
- if '"' in val:
- fmt = "%s='%s'"
- if "'" in val:
- # TODO: replace with apos when
- # appropriate.
- val = val.replace("'", "&squot;")
-
- # Now we're okay w/r/t quotes. But the attribute
- # value might also contain angle brackets, or
- # ampersands that aren't part of entities. We need
- # to escape those to XML entities too.
- val = self.BARE_AMPERSAND_OR_BRACKET.sub(self._sub_entity, val)
- if val is None:
- # Handle boolean attributes.
- decoded = key
- else:
- decoded = fmt % (key, val)
- attrs.append(decoded)
- close = ''
- closeTag = ''
- if self.isSelfClosing:
- close = ' /'
- else:
- closeTag = '</%s>' % self.name
-
- indentTag, indentContents = 0, 0
- if prettyPrint:
- indentTag = indentLevel
- space = (' ' * (indentTag-1))
- indentContents = indentTag + 1
- contents = self.decodeContents(prettyPrint, indentContents,
- eventualEncoding)
- if self.hidden:
- s = contents
- else:
- s = []
- attributeString = ''
- if attrs:
- attributeString = ' ' + ' '.join(attrs)
- if prettyPrint:
- s.append(space)
- s.append('<%s%s%s>' % (self.name, attributeString, close))
- if prettyPrint:
- s.append("\n")
- s.append(contents)
- if prettyPrint and contents and contents[-1] != "\n":
- s.append("\n")
- if prettyPrint and closeTag:
- s.append(space)
- s.append(closeTag)
- if prettyPrint and closeTag and self.nextSibling:
- s.append("\n")
- s = ''.join(s)
- return s
-
- def decompose(self):
- """Recursively destroys the contents of this tree."""
- contents = [i for i in self.contents]
- for i in contents:
- if isinstance(i, Tag):
- i.decompose()
- else:
- i.extract()
- self.extract()
-
- def prettify(self, encoding=DEFAULT_OUTPUT_ENCODING):
- return self.encode(encoding, True)
-
- def encodeContents(self, encoding=DEFAULT_OUTPUT_ENCODING,
- prettyPrint=False, indentLevel=0):
- return self.decodeContents(prettyPrint, indentLevel).encode(encoding)
-
- def decodeContents(self, prettyPrint=False, indentLevel=0,
- eventualEncoding=DEFAULT_OUTPUT_ENCODING):
- """Renders the contents of this tag as a string in the given
- encoding. If encoding is None, returns a Unicode string.."""
- s=[]
- for c in self:
- text = None
- if isinstance(c, NavigableString):
- text = c.decodeGivenEventualEncoding(eventualEncoding)
- elif isinstance(c, Tag):
- s.append(c.decode(prettyPrint, indentLevel, eventualEncoding))
- if text and prettyPrint:
- text = text.strip()
- if text:
- if prettyPrint:
- s.append(" " * (indentLevel-1))
- s.append(text)
- if prettyPrint:
- s.append("\n")
- return ''.join(s)
-
- #Soup methods
-
- def find(self, name=None, attrs={}, recursive=True, text=None,
- **kwargs):
- """Return only the first child of this Tag matching the given
- criteria."""
- r = None
- l = self.findAll(name, attrs, recursive, text, 1, **kwargs)
- if l:
- r = l[0]
- return r
- findChild = find
-
- def findAll(self, name=None, attrs={}, recursive=True, text=None,
- limit=None, **kwargs):
- """Extracts a list of Tag objects that match the given
- criteria. You can specify the name of the Tag and any
- attributes you want the Tag to have.
-
- The value of a key-value pair in the 'attrs' map can be a
- string, a list of strings, a regular expression object, or a
- callable that takes a string and returns whether or not the
- string matches for some custom definition of 'matches'. The
- same is true of the tag name."""
- generator = self.recursiveChildGenerator
- if not recursive:
- generator = self.childGenerator
- return self._findAll(name, attrs, text, limit, generator, **kwargs)
- findChildren = findAll
-
- #Private methods
-
- def _getAttrMap(self):
- """Initializes a map representation of this tag's attributes,
- if not already initialized."""
- if not getattr(self, 'attrMap'):
- self.attrMap = {}
- for (key, value) in self.attrs:
- self.attrMap[key] = value
- return self.attrMap
-
- #Generator methods
- def childGenerator(self):
- for i in range(0, len(self.contents)):
- yield self.contents[i]
- raise StopIteration
-
- def recursiveChildGenerator(self):
- if not len(self.contents):
- raise StopIteration
- stopNode = self._lastRecursiveChild().next
- current = self.contents[0]
- while current is not stopNode:
- yield current
- current = current.next
-
-# Next, a couple classes to represent queries and their results.
-class SoupStrainer:
- """Encapsulates a number of ways of matching a markup element (tag or
- text)."""
-
- def __init__(self, name=None, attrs={}, text=None, **kwargs):
- self.name = name
- if isString(attrs):
- kwargs['class'] = attrs
- attrs = None
- if kwargs:
- if attrs:
- attrs = attrs.copy()
- attrs.update(kwargs)
- else:
- attrs = kwargs
- self.attrs = attrs
- self.text = text
-
- def __str__(self):
- if self.text:
- return self.text
- else:
- return "%s|%s" % (self.name, self.attrs)
-
- def searchTag(self, markupName=None, markupAttrs={}):
- found = None
- markup = None
- if isinstance(markupName, Tag):
- markup = markupName
- markupAttrs = markup
- callFunctionWithTagData = callable(self.name) \
- and not isinstance(markupName, Tag)
-
- if (not self.name) \
- or callFunctionWithTagData \
- or (markup and self._matches(markup, self.name)) \
- or (not markup and self._matches(markupName, self.name)):
- if callFunctionWithTagData:
- match = self.name(markupName, markupAttrs)
- else:
- match = True
- markupAttrMap = None
- for attr, matchAgainst in self.attrs.items():
- if not markupAttrMap:
- if hasattr(markupAttrs, 'get'):
- markupAttrMap = markupAttrs
- else:
- markupAttrMap = {}
- for k,v in markupAttrs:
- markupAttrMap[k] = v
- attrValue = markupAttrMap.get(attr)
- if not self._matches(attrValue, matchAgainst):
- match = False
- break
- if match:
- if markup:
- found = markup
- else:
- found = markupName
- return found
-
- def search(self, markup):
- #print 'looking for %s in %s' % (self, markup)
- found = None
- # If given a list of items, scan it for a text element that
- # matches.
- if isList(markup) and not isinstance(markup, Tag):
- for element in markup:
- if isinstance(element, NavigableString) \
- and self.search(element):
- found = element
- break
- # If it's a Tag, make sure its name or attributes match.
- # Don't bother with Tags if we're searching for text.
- elif isinstance(markup, Tag):
- if not self.text:
- found = self.searchTag(markup)
- # If it's text, make sure the text matches.
- elif isinstance(markup, NavigableString) or \
- isString(markup):
- if self._matches(markup, self.text):
- found = markup
- else:
- raise Exception, "I don't know how to match against a %s" \
- % markup.__class__
- return found
-
- def _matches(self, markup, matchAgainst):
- #print "Matching %s against %s" % (markup, matchAgainst)
- result = False
- if matchAgainst == True and type(matchAgainst) == types.BooleanType:
- result = markup != None
- elif callable(matchAgainst):
- result = matchAgainst(markup)
- else:
- #Custom match methods take the tag as an argument, but all
- #other ways of matching match the tag name as a string.
- if isinstance(markup, Tag):
- markup = markup.name
- if markup is not None and not isString(markup):
- markup = unicode(markup)
- #Now we know that chunk is either a string, or None.
- if hasattr(matchAgainst, 'match'):
- # It's a regexp object.
- result = markup and matchAgainst.search(markup)
- elif (isList(matchAgainst)
- and (markup is not None or not isString(matchAgainst))):
- result = markup in matchAgainst
- elif hasattr(matchAgainst, 'items'):
- result = markup.has_key(matchAgainst)
- elif matchAgainst and isString(markup):
- if isinstance(markup, unicode):
- matchAgainst = unicode(matchAgainst)
- else:
- matchAgainst = str(matchAgainst)
-
- if not result:
- result = matchAgainst == markup
- return result
-
-class ResultSet(list):
- """A ResultSet is just a list that keeps track of the SoupStrainer
- that created it."""
- def __init__(self, source):
- list.__init__([])
- self.source = source