Geometry serialization (#71)

Serialize geometry to IFC instances directly from a TopoDS_Shape

src/ifcopenshell-python/ifcopenshell/file.py

@@ -0,0 +1,57 @@
+###############################################################################
+#                                                                             #
+# This file is part of IfcOpenShell.                                          #
+#                                                                             #
+# IfcOpenShell is free software: you can redistribute it and/or modify        #
+# it under the terms of the Lesser GNU General Public License as published by #
+# the Free Software Foundation, either version 3.0 of the License, or         #
+# (at your option) any later version.                                         #
+#                                                                             #
+# IfcOpenShell is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                #
+# Lesser GNU General Public License for more details.                         #
+#                                                                             #
+# You should have received a copy of the Lesser GNU General Public License    #
+# along with this program. If not, see <http://www.gnu.org/licenses/>.        #
+#                                                                             #
+###############################################################################
+
+import numbers
+import functools
+
+from . import ifcopenshell_wrapper
+from .entity_instance import entity_instance
+
+class file(object):
+	def __init__(self, f=None):
+		self.wrapped_data = f or ifcopenshell_wrapper.file(True)
+	def create_entity(self,type,*args,**kwargs):
+		e = entity_instance(ifcopenshell_wrapper.entity_instance(type))
+		attrs = list(enumerate(args)) + \
+			[(e.wrapped_data.get_argument_index(name), arg) for name, arg in kwargs.items()]
+		for idx, arg in attrs: e[idx] = arg
+		self.wrapped_data.add(e.wrapped_data)
+		e.wrapped_data.this.disown()
+		return e
+	def __getattr__(self, attr):
+		if attr[0:6] == 'create': return functools.partial(self.create_entity,attr[6:])
+		else: return getattr(self.wrapped_data, attr)
+	def __getitem__(self, key):
+		if isinstance(key, numbers.Integral):
+			return entity_instance(self.wrapped_data.by_id(key))
+		elif isinstance(key, str):
+			return entity_instance(self.wrapped_data.by_guid(key))
+	def by_id(self, id): return self[id]
+	def by_guid(self, guid): return self[guid]
+	def add(self, inst):
+		inst.wrapped_data.this.disown()
+		return entity_instance(self.wrapped_data.add(inst.wrapped_data))
+	def by_type(self, type):
+		return [entity_instance(e) for e in self.wrapped_data.by_type(type)]
+	def traverse(self, inst):
+		return [entity_instance(e) for e in self.wrapped_data.traverse(inst.wrapped_data)]
+	def remove(self, inst):
+		return self.wrapped_data.remove(inst.wrapped_data)
+	def __iter__(self):
+		return iter(self[id] for id in self.wrapped_data.entity_names())