WIP implement partial editing for adding / removing subcontexts. See #1222.

src/ifcblenderexport/blenderbim/bim/module/context/add_context.py

@@ -0,0 +1,36 @@
+class Usecase:
+    def __init__(self, file, settings=None):
+        self.file = file
+        self.settings = {
+            "context": None,
+            "subcontext": None,
+            "target_view": None,
+        }
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        parent = [
+            c
+            for c in self.file.by_type("IfcGeometricRepresentationContext")
+            if c.ContextType == self.settings["context"]
+        ]
+        if not parent:
+            self.create_origin()
+            if self.settings["context"] == "Plan":
+                return self.file.createIfcGeometricRepresentationContext(None, "Plan", 2, 1.0e-05, self.origin)
+            return self.file.createIfcGeometricRepresentationContext(None, "Model", 3, 1.0e-05, self.origin)
+        parent = parent[0]
+        return self.file.create_entity("IfcGeometricRepresentationSubContext", **{
+            "ContextIdentifier": self.settings["subcontext"],
+            "ContextType": self.settings["context"],
+            "ParentContext": parent,
+            "TargetView": self.settings["target_view"],
+        })
+
+    def create_origin(self):
+        self.origin = self.file.createIfcAxis2Placement3D(
+            self.file.createIfcCartesianPoint((0.0, 0.0, 0.0)),
+            self.file.createIfcDirection((0.0, 0.0, 1.0)),
+            self.file.createIfcDirection((1.0, 0.0, 0.0)),
+        )

src/ifcblenderexport/blenderbim/bim/module/context/remove_context.py

@@ -0,0 +1,12 @@
+class Usecase:
+    def __init__(self, file, settings=None):
+        self.file = file
+        self.settings = {"context": None}
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        # TODO: this is a light remove only
+        for subcontext in self.settings["context"].HasSubContexts:
+            self.file.remove(subcontext)
+        self.file.remove(self.settings["context"])