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from zope.interface import implements
from twisted.python.components import registerAdapter
from nevow import loaders, rend, inevow, tags as T
from formless import annotate, webform
class Tree(dict):
def __init__(self, name, description, *children):
self.name = name
self.description = description
for child in children:
self.add(child)
def add(self, child):
self[child.name] = child
def __nonzero__(self):
return True
class ITreeEdit(annotate.TypedInterface):
def setDescription(description=annotate.String()):
pass
setDescription = annotate.autocallable(setDescription)
def deleteChild(name=annotate.String(required=True)):
pass
deleteChild = annotate.autocallable(deleteChild, invisible=True)
def addChild(name=annotate.String(required=True),
description=annotate.String()):
pass
addChild = annotate.autocallable(addChild)
class TreeRenderer(rend.Page):
implements(ITreeEdit)
addSlash = True
docFactory = loaders.htmlstr("""
<html>
<head><title>Tree Editor</title></head>
<body><h1><span nevow:data="description"
nevow:render="string">Tree Description</span></h1>
<span nevow:render="descriptionForm"/>
<ol nevow:data="children" nevow:render="sequence">
<li nevow:pattern="item"><span nevow:render="childLink"/>
<span nevow:render="childDel"/>
</li>
</ol>
<a href="..">Up</a>
</body>
</html>
""")
def setDescription(self, description):
self.original.description = description
def addChild(self, name, description):
self.original.add(Tree(name, description))
def deleteChild(self, name):
del self.original[name]
def data_description(self, context, data):
return self.original.description
def data_children(self, context, data):
return self.original.items()
def render_childLink(self, context, data):
return T.a(href='subtree_%s/'%data[0])[data[1].description]
def childFactory(self, ctx, name):
if name.startswith('subtree_'):
return self.original[name[len('subtree_'):]]
def render_descriptionForm(self, context, data):
return webform.renderForms()
def render_childDel(self, context, (name, _)):
ret = T.form(action="./freeform_post!!deleteChild",
enctype="multipart/form-data", method="POST")[
T.input(type="hidden", name="name", value=name),
T.input(type="submit", value="Delete")]
return ret
registerAdapter(TreeRenderer, Tree, inevow.IResource)
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