def add_branch(self, node=None, text=None):
"""Add new node to specified existing node.
Input Arguments:
node - ID of node to branch off. Default is START_OF_BOOK
text - Text to associate with newly created node. Default is ""
Returns:
ID of newly created node
"""
node = node or self._BEGIN
assert(node in self._nodes)
new_node = Node()
new_id = new_node.get_id()
if text is not None:
new_node.set_text(text)
self._nodes[new_id] = new_node
self._nodes[node].add_link(new_id)
return new_id
def add_branch(self, node=None, text=None):
"""Add new node to specified existing node.
Input Arguments:
node - ID of node to branch off. Default is START_OF_BOOK
text - Text to associate with newly created node. Default is ""
Returns:
ID of newly created node
"""
node = node or self._BEGIN
assert (node in self._nodes)
new_node = Node()
new_id = new_node.get_id()
if text is not None:
new_node.set_text(text)
self._nodes[new_id] = new_node
self._nodes[node].add_link(new_id)
return new_id
def insert_branch(self, node, break_pt):
"""Break a specified node in two, thus introducing a new branch point.
Input Arguments:
node - ID of node to insert branch point
break_pt - location in node for new branch point
Returns:
ID of original node
"""
assert(node in self._nodes)
assert(0 < break_pt < len(self._nodes[node].get_text()))
new_node = Node()
new_id = new_node.get_id()
new_node.set_text(self._nodes[node].get_text()[break_pt:])
new_node._set_links(self._nodes[node].get_links())
self._nodes[new_id] = new_node
self._nodes[node].set_text(self._nodes[node].get_text()[0:break_pt])
self._nodes[node]._set_links({new_id: 0.0})
return node
def insert_branch(self, node, break_pt):
"""Break a specified node in two, thus introducing a new branch point.
Input Arguments:
node - ID of node to insert branch point
break_pt - location in node for new branch point
Returns:
ID of original node
"""
assert (node in self._nodes)
assert (0 < break_pt < len(self._nodes[node].get_text()))
new_node = Node()
new_id = new_node.get_id()
new_node.set_text(self._nodes[node].get_text()[break_pt:])
new_node._set_links(self._nodes[node].get_links())
self._nodes[new_id] = new_node
self._nodes[node].set_text(self._nodes[node].get_text()[0:break_pt])
self._nodes[node]._set_links({new_id: 0.0})
return node