From 08d6c0a2d8c707cbd12ecf25c18bc74554aa596b Mon Sep 17 00:00:00 2001
From: Dion Moult <dion@thinkmoult.com>
Date: Sat, 24 Jul 2021 22:08:50 +1000
Subject: [PATCH] Openings are now auto dissolved when authoring for easier
 editing.

---
 .../blenderbim/bim/module/model/handler.py    |  4 ++-
 .../blenderbim/bim/module/model/opening.py    | 27 +++++++++++++++++++
 2 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/src/blenderbim/blenderbim/bim/module/model/handler.py b/src/blenderbim/blenderbim/bim/module/model/handler.py
index e24fbac6e3..58bfa687aa 100644
--- a/src/blenderbim/blenderbim/bim/module/model/handler.py
+++ b/src/blenderbim/blenderbim/bim/module/model/handler.py
@@ -1,7 +1,7 @@
 import bpy
 import ifcopenshell
 import ifcopenshell.api
-from blenderbim.bim.module.model import product, wall, slab, profile
+from blenderbim.bim.module.model import product, wall, slab, profile, opening
 from blenderbim.bim.ifc import IfcStore
 from bpy.app.handlers import persistent
 
@@ -17,6 +17,8 @@ def load_post(*args):
         product.regenerate_profile_usage,
     )
 
+    IfcStore.add_element_listener(opening.element_listener)
+
     IfcStore.add_element_listener(wall.element_listener)
     ifcopenshell.api.add_pre_listener(
         "geometry.add_representation", "BlenderBIM.DumbWall.EnsureSolid", wall.ensure_solid
diff --git a/src/blenderbim/blenderbim/bim/module/model/opening.py b/src/blenderbim/blenderbim/bim/module/model/opening.py
index e2dcdd33c2..795035aa41 100644
--- a/src/blenderbim/blenderbim/bim/module/model/opening.py
+++ b/src/blenderbim/blenderbim/bim/module/model/opening.py
@@ -1,10 +1,37 @@
 import bpy
 import bmesh
+import blenderbim.bim.handler
+from blenderbim.bim.ifc import IfcStore
+from math import pi
 from bpy.types import Operator
 from bpy.props import FloatProperty
 from bpy_extras.object_utils import AddObjectHelper, object_data_add
 
 
+def element_listener(element, obj):
+    blenderbim.bim.handler.subscribe_to(obj, "mode", mode_callback)
+
+
+def mode_callback(obj, data):
+    for obj in bpy.context.selected_objects + [bpy.context.active_object]:
+        if (
+            obj.mode != "EDIT"
+            or not obj.data
+            or not isinstance(obj.data, (bpy.types.Mesh, bpy.types.Curve, bpy.types.TextCurve))
+            or not obj.BIMObjectProperties.ifc_definition_id
+            or not bpy.context.scene.BIMProjectProperties.is_authoring
+        ):
+            return
+        product = IfcStore.get_file().by_id(obj.BIMObjectProperties.ifc_definition_id)
+        if not product.is_a("IfcOpeningElement"):
+            return
+        IfcStore.edited_objs.add(obj)
+        bm = bmesh.from_edit_mesh(obj.data)
+        bmesh.ops.dissolve_limit(bm, angle_limit=pi / 180 * 1, verts=bm.verts, edges=bm.edges)
+        bmesh.update_edit_mesh(obj.data)
+        bm.free()
+
+
 def add_object(self, context):
     bm = bmesh.new()
     bmesh.ops.create_cube(bm, size=self.size)