from . import _base

from ..constants import voidElements

from xml.sax.saxutils import escape

# Really crappy basic implementation of a DOM-core like thing

class Node(_base.Node):

type = -1

def __init__(self, name):

self.name = name

self.parent = None

self.value = None

self.childNodes = []

self._flags = []

def __iter__(self):

for node in self.childNodes:

yield node

for item in node:

yield item

def __str__(self):

return self.name

def toxml(self):

raise NotImplementedError

def printTree(self, indent=0):

tree = '\n|%s%s' % (' '* indent, str(self))

for child in self.childNodes:

tree += child.printTree(indent + 2)

return tree

def appendChild(self, node):

if (isinstance(node, TextNode) and self.childNodes and

isinstance(self.childNodes[-1], TextNode)):

self.childNodes[-1].value += node.value

else:

self.childNodes.append(node)

node.parent = self

def insertText(self, data, insertBefore=None):

if insertBefore is None:

self.appendChild(TextNode(data))

else:

self.insertBefore(TextNode(data), insertBefore)

def insertBefore(self, node, refNode):

index = self.childNodes.index(refNode)

if (isinstance(node, TextNode) and index > 0 and

isinstance(self.childNodes[index - 1], TextNode)):

self.childNodes[index - 1].value += node.value

else:

self.childNodes.insert(index, node)

node.parent = self

def removeChild(self, node):

try:

self.childNodes.remove(node)

except:

# XXX

raise

node.parent = None

def cloneNode(self):

newNode = type(self)(self.name)

if hasattr(self, 'namespace'):

newNode.namespace = self.namespace

if hasattr(self, 'attributes'):

for attr, value in self.attributes.items():

newNode.attributes[attr] = value

newNode.value = self.value

return newNode

def hasContent(self):

"""Return true if the node has children or text"""

return bool(self.childNodes)

class Document(Node):

type = 1

def __init__(self):

Node.__init__(self, None)

def __str__(self):

return "#document"

def appendChild(self, child):

Node.appendChild(self, child)

def toxml(self, encoding="utf=8"):

result = ""

for child in self.childNodes:

result += child.toxml()

return result.encode(encoding)

def hilite(self, encoding="utf-8"):

result = "<pre>"

for child in self.childNodes:

result += child.hilite()

return result.encode(encoding) + "</pre>"

def printTree(self):

tree = str(self)

for child in self.childNodes:

tree += child.printTree(2)

return tree

class DocumentFragment(Document):

type = 2

def __str__(self):

return "#document-fragment"

class DocumentType(Node):

type = 3

def __init__(self, name, publicId, systemId):

Node.__init__(self, name)

self.publicId = publicId

self.systemId = systemId

def __str__(self):

if self.publicId or self.systemId:

publicId = self.publicId or ""

systemId = self.systemId or ""

return """<!DOCTYPE %s "%s" "%s">"""%(

self.name, publicId, systemId)

else:

return "<!DOCTYPE %s>" % self.name

toxml = __str__

def hilite(self):

return '<code class="markup doctype">&lt;!DOCTYPE %s></code>' % self.name

class TextNode(Node):

type = 4

def __init__(self, value):

Node.__init__(self, None)

self.value = value

def __str__(self):

return "\"%s\"" % self.value

def toxml(self):

return escape(self.value)

hilite = toxml

class Element(Node):

type = 5

def __init__(self, name, namespace=None):

Node.__init__(self, name)

self.namespace = namespace

self.attributes = {}

def __str__(self):

return "<%s>" % self.name

def toxml(self):

result = '<' + self.name

if self.attributes:

for name,value in self.attributes.items():

result += ' %s="%s"' % (name, escape(value,{'"':'&quot;'}))

if self.childNodes:

result += '>'

for child in self.childNodes:

result += child.toxml()

result += '</%s>' % self.name

else:

result += '/>'

return result

def hilite(self):

result = '&lt;<code class="markup element-name">%s</code>' % self.name

if self.attributes:

for name, value in self.attributes.items():

result += ' <code class="markup attribute-name">%s</code>=<code class="markup attribute-value">"%s"</code>' % (name, escape(value, {'"':'&quot;'}))

if self.childNodes:

result += ">"

for child in self.childNodes:

result += child.hilite()

elif self.name in voidElements:

return result + ">"

return result + '&lt;/<code class="markup element-name">%s</code>>' % self.name

def printTree(self, indent):

tree = '\n|%s%s' % (' '*indent, str(self))

indent += 2

if self.attributes:

for name, value in self.attributes.items():

tree += '\n|%s%s="%s"' % (' ' * indent, name, value)

for child in self.childNodes:

tree += child.printTree(indent)

return tree

class CommentNode(Node):

type = 6

def __init__(self, data):

Node.__init__(self, None)

self.data = data

def __str__(self):

return "<!-- %s -->" % self.data

def toxml(self):

return "<!--%s-->" % self.data

def hilite(self):

return '<code class="markup comment">&lt;!--%s--></code>' % escape(self.data)

class TreeBuilder(_base.TreeBuilder):

documentClass = Document

doctypeClass = DocumentType

elementClass = Element

commentClass = CommentNode

fragmentClass = DocumentFragment

def testSerializer(self, node):

return node.printTree()