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########################################################################
#
# File Name: HTMLDocument.py
#
# Documentation: http://docs.4suite.com/4DOM/HTMLDocument.py.html
#
"""
WWW: http://4suite.com/4DOM e-mail: support@4suite.com
Copyright (c) 2000 Fourthought Inc, USA. All Rights Reserved.
See http://4suite.com/COPYRIGHT for license and copyright information
"""
from xml.dom import Node
from xml.dom import NotSupportedErr
from xml.dom.Document import Document
from xml.dom import implementation
from xml.dom import ext
import string, sys
from xml.dom.html import HTML_DTD
class HTMLDocument(Document):
def __init__(self):
Document.__init__(self, None)
# These only make sense in a browser environment, therefore
# they never change
self.__dict__['__referrer'] = ''
self.__dict__['__domain'] = None
self.__dict__['__URL'] = ''
self.__dict__['__cookie'] = ''
self.__dict__['__writable'] = 0
self.__dict__['_html'] = vars(sys.modules['xml.dom.html'])
### Attribute Methods ###
def _get_URL(self):
return self.__dict__['__URL']
def _get_anchors(self):
anchors = self.getElementsByTagName('A');
anchors = filter(lambda x: x._get_name(), anchors)
return implementation._4dom_createHTMLCollection(anchors)
def _get_applets(self):
al = self.getElementsByTagName('APPLET')
ol = self.getElementsByTagName('OBJECT')
ol = filter(lambda x: x._get_code(), ol)
return implementation._4dom_createHTMLCollection(al+ol)
def _get_body(self):
body = ''
#Try to find the body or FRAMESET
elements = self.getElementsByTagName('FRAMESET')
if not elements:
elements = self.getElementsByTagName('BODY')
if elements:
body = elements[0]
else:
#Create a body
body = self.createElement('BODY')
self.documentElement.appendChild(body)
return body
def _set_body(self, newBody):
elements = self.getElementsByTagName('FRAMESET')
if not elements:
elements = self.getElementsByTagName('BODY')
if elements:
# Replace the existing one
elements[0].parentNode.replaceChild(newBody, elements[0])
else:
# Add it
self.documentElement.appendChild(newBody)
def _get_cookie(self):
return self.__dict__['__cookie']
def _set_cookie(self, cookie):
self.__dict__['__cookie'] = cookie
def _get_domain(self):
return self.__dict__['__domain']
def _get_forms(self):
forms = self.getElementsByTagName('FORM')
return implementation._4dom_createHTMLCollection(forms)
def _get_images(self):
images = self.getElementsByTagName('IMG')
return implementation._4dom_createHTMLCollection(images)
def _get_links(self):
areas = self.getElementsByTagName('AREA')
anchors = self.getElementsByTagName('A')
links = filter(lambda x: x._get_href(), areas+anchors)
return implementation._4dom_createHTMLCollection(links)
def _get_referrer(self):
return self.__dict__['__referrer']
def _get_title(self):
elements = self.getElementsByTagName('TITLE')
if elements:
#Take the first
title = elements[0]
title.normalize()
if title.firstChild:
return title.firstChild.data
return ''
def _set_title(self, title):
# See if we can find the title
title_nodes = self.getElementsByTagName('TITLE')
if title_nodes:
title_node = title_nodes[0]
title_node.normalize()
if title_node.firstChild:
title_node.firstChild.data = title
return
else:
title_node = self.createElement('TITLE')
self._4dom_getHead().appendChild(title_node)
text = self.createTextNode(title)
title_node.appendChild(text)
### Methods ###
def close(self):
self.__dict__['__writable'] = 0
def getElementsByName(self, elementName):
return self._4dom_getElementsByAttribute('*', 'NAME', elementName)
def open(self):
#Clear out the doc
self.__dict__['__referrer'] = ''
self.__dict__['__domain'] = None
self.__dict__['__url'] = ''
self.__dict__['__cookie'] = ''
self.__dict__['__writable'] = 1
def write(self, st):
if not self.__dict__['__writable']:
return
#We need to parse the string here
from xml.dom.ext.reader.HtmlLib import FromHTML
d = FromHtml(st, self)
if d != self:
self.appendChild(d)
def writeln(self, st):
st = st + '\n'
self.write(st)
def getElementByID(self, ID):
hc = self._4dom_getElementsByAttribute('*','ID',ID)
if hc.length != 0:
return hc[0]
return None
### Overridden Methods ###
def createElement(self, tagName):
return self._4dom_createHTMLElement(tagName)
def createAttribute(self, name):
return Document.createAttribute(self, string.upper(name))
def createCDATASection(*args, **kw):
raise NotSupportedErr()
def createEntityReference(*args, **kw):
raise NotSupportedErr()
def createProcessingInstruction(*args, **kw):
raise NotSupportedErr()
def _4dom_createEntity(*args, **kw):
raise NotSupportedErr()
def _4dom_createNotation(*args, **kw):
raise NotSupportedErr()
### Internal Methods ###
def _4dom_getElementsByAttribute(self, tagName, attribute, attrValue=None):
nl = self.getElementsByTagName(tagName)
hc = implementation._4dom_createHTMLCollection()
for elem in nl:
attr = elem.getAttribute(attribute)
if attrValue == None and attr != '':
hc.append(elem)
elif attr == attrValue:
hc.append(elem)
return hc
def _4dom_getHead(self):
nl = self.getElementsByTagName('HEAD')
if not nl:
head = self.createElement('HEAD')
#The head goes in front of the body
body = self._get_body()
self.documentElement.insertBefore(head, body)
else:
head = nl[0]
return head
def _4dom_createHTMLElement(self, tagName):
lowered = string.lower(tagName)
if not HTML_DTD.has_key(lowered):
raise TypeError('Unknown HTML Element: %s' % tagName)
if lowered in NoClassTags:
from HTMLElement import HTMLElement
return HTMLElement(self, tagName)
#FIXME: capitalize() broken with unicode in Python 2.0
#normTagName = string.capitalize(tagName)
capitalized = string.upper(tagName[0]) + lowered[1:]
element = HTMLTagMap.get(capitalized, capitalized)
module = 'HTML%sElement' % element
if not self._html.has_key(module):
#Try to import it (should never fail)
__import__('xml.dom.html.%s' % module)
# Class and module have the same name
klass = getattr(self._html[module], module)
return klass(self, tagName)
def cloneNode(self, deep):
clone = HTMLDocument()
clone.__dict__['__referrer'] = self._get_referrer()
clone.__dict__['__domain'] = self._get_domain()
clone.__dict__['__URL'] = self._get_URL()
clone.__dict__['__cookie'] = self._get_cookie()
if deep:
if self.doctype is not None:
# Cannot have any children, no deep needed
dt = self.doctype.cloneNode(0)
clone._4dom_setDocumentType(dt)
if self.documentElement is not None:
# The root element can have children, duh
root = self.documentElement.cloneNode(1, newOwner=clone)
clone.appendChild(root)
return clone
def isXml(self):
return 0
def isHtml(self):
return 1
### Attribute Access Mappings ###
_readComputedAttrs = Document._readComputedAttrs.copy()
_readComputedAttrs.update ({
'title' : _get_title,
'referrer' : _get_referrer,
'domain' : _get_domain,
'URL' : _get_URL,
'body' : _get_body,
'images' : _get_images,
'applets' : _get_applets,
'links' : _get_links,
'forms' : _get_forms,
'anchors' : _get_anchors,
'cookie' : _get_cookie
})
_writeComputedAttrs = Document._writeComputedAttrs.copy()
_writeComputedAttrs.update ({
'title' : _set_title,
'body' : _set_body,
'cookie' : _set_cookie,
})
# Create the read-only list of attributes
_readOnlyAttrs = filter(lambda k,m=_writeComputedAttrs: not m.has_key(k),
Document._readOnlyAttrs + _readComputedAttrs.keys())
# HTML tags that don't map directly to a class name
HTMLTagMap = {'Isindex': 'IsIndex',
'Optgroup': 'OptGroup',
'Textarea': 'TextArea',
'Fieldset': 'FieldSet',
'Ul': 'UList',
'Ol': 'OList',
'Dl': 'DList',
'Dir': 'Directory',
'Li': 'LI',
'P': 'Paragraph',
'H1': 'Heading',
'H2': 'Heading',
'H3': 'Heading',
'H4': 'Heading',
'H5': 'Heading',
'H6': 'Heading',
'Q': 'Quote',
'Blockquote': 'Quote',
'Br': 'BR',
'Basefont': 'BaseFont',
'Hr': 'HR',
'A': 'Anchor',
'Img': 'Image',
'Caption': 'TableCaption',
'Col': 'TableCol',
'Colgroup': 'TableCol',
'Td': 'TableCell',
'Th': 'TableCell',
'Tr': 'TableRow',
'Thead': 'TableSection',
'Tbody': 'TableSection',
'Tfoot': 'TableSection',
'Frameset': 'FrameSet',
'Iframe': 'IFrame',
'Form': 'Form',
'Ins' : 'Mod',
'Del' : 'Mod',
}
#HTML Elements with no specific DOM Interface of their own
NoClassTags = ['sub',
'sup',
'span',
'bdo',
'tt',
'i',
'b',
'u',
's',
'strike',
'big',
'small',
'em',
'strong',
'dfn',
'code',
'samp',
'kbd',
'var',
'cite',
'acronym',
'abbr',
'dd',
'dt',
'noframes',
'noscript',
'address',
'center',
]
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