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from ..lists import flat_map
from .nodes import TextNode, Element, SelfClosingElement, ForceWrite, NodeVisitor
def text(value):
return TextNode(value)
def element(tag_name, attributes=None, children=None):
if attributes is None:
attributes = {}
if children is None:
children = []
return Element([tag_name], attributes, children, collapsible=False)
def self_closing_element(tag_name, attributes=None):
if attributes is None:
attributes = {}
return SelfClosingElement(tag_name, attributes)
force_write = ForceWrite()
def strip_empty(nodes):
return flat_map(_strip_empty_node, nodes)
def _strip_empty_node(node):
return StripEmpty().visit(node)
class StripEmpty(NodeVisitor):
def visit_text_node(self, node):
if node.value:
return [node]
else:
return []
def visit_element(self, element):
children = strip_empty(element.children)
if len(children) == 0:
return []
else:
return [Element(
element.tag_names,
element.attributes,
children,
collapsible=element.collapsible)]
def visit_self_closing_element(self, element):
return [element]
def visit_force_write(self, node):
return [node]
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