Begin drafting out a new representation items panel for managing styles and layers properly

src/blenderbim/blenderbim/bim/module/geometry/__init__.py

@@ -22,7 +22,9 @@ from . import ui, prop, operator
 classes = (
     operator.AddRepresentation,
     operator.CopyRepresentation,
+    operator.DisableEditingRepresentationItems,
     operator.EditObjectPlacement,
+    operator.EnableEditingRepresentationItems,
     operator.FlipObject,
     operator.GetRepresentationIfcParameters,
     operator.OverrideDelete,
@@ -47,16 +49,19 @@ classes = (
     operator.SwitchRepresentation,
     operator.UpdateParametricRepresentation,
     operator.UpdateRepresentation,
+    prop.RepresentationItem,
     prop.BIMObjectGeometryProperties,
     prop.BIMGeometryProperties,
     ui.BIM_PT_placement,
     ui.BIM_PT_representations,
+    ui.BIM_PT_representation_items,
     ui.BIM_PT_connections,
     ui.BIM_PT_mesh,
     ui.BIM_PT_derived_coordinates,
     ui.BIM_PT_workarounds,
     ui.BIM_MT_object_set_origin,
     ui.BIM_MT_separate,
+    ui.BIM_UL_representation_items,
 )
 
 

src/blenderbim/blenderbim/bim/module/geometry/data.py

@@ -26,6 +26,7 @@ def refresh():
     PlacementData.is_loaded = False
     DerivedCoordinatesData.is_loaded = False
     RepresentationsData.is_loaded = False
+    RepresentationItemsData.is_loaded = False
     ConnectionsData.is_loaded = False
 
 
@@ -92,6 +93,34 @@ class RepresentationsData:
         return results
 
 
+class RepresentationItemsData:
+    data = {}
+    is_loaded = False
+
+    @classmethod
+    def load(cls):
+        cls.data = {"total_items": cls.total_items()}
+        cls.is_loaded = True
+
+    @classmethod
+    def total_items(cls):
+        active_representation_id = None
+        result = 0
+        if bpy.context.active_object.data and hasattr(bpy.context.active_object.data, "BIMMeshProperties"):
+            active_representation_id = bpy.context.active_object.data.BIMMeshProperties.ifc_definition_id
+            element = tool.Ifc.get().by_id(active_representation_id)
+            if not element.is_a("IfcShapeRepresentation"):
+                return 0
+            queue = list(element.Items)
+            while queue:
+                item = queue.pop()
+                if item.is_a("IfcMappedItem"):
+                    queue.extend(item.MappingSource.MappedRepresentation.Items)
+                else:
+                    result += 1
+        return result
+
+
 class ConnectionsData:
     data = {}
     is_loaded = False

src/blenderbim/blenderbim/bim/module/geometry/operator.py

@@ -1727,3 +1727,53 @@ class FlipObject(bpy.types.Operator):
         for obj in context.selected_objects:
             tool.Geometry.flip_object(obj, self.flip_local_axes)
         return {"FINISHED"}
+
+
+class EnableEditingRepresentationItems(bpy.types.Operator, Operator):
+    bl_idname = "bim.enable_editing_representation_items"
+    bl_label = "Enable Editing Representation Items"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        obj = context.active_object
+
+        props = obj.BIMGeometryProperties
+        props.is_editing = True
+
+        props.items.clear()
+
+        if bpy.context.active_object.data and hasattr(bpy.context.active_object.data, "BIMMeshProperties"):
+            active_representation_id = bpy.context.active_object.data.BIMMeshProperties.ifc_definition_id
+            element = tool.Ifc.get().by_id(active_representation_id)
+            if not element.is_a("IfcShapeRepresentation"):
+                return
+            queue = list(element.Items)
+            while queue:
+                item = queue.pop()
+                if item.is_a("IfcMappedItem"):
+                    queue.extend(item.MappingSource.MappedRepresentation.Items)
+                else:
+                    new = props.items.add()
+                    new.name = item.is_a()
+                    new.ifc_definition_id = item.id()
+
+                    styles = []
+                    for inverse in tool.Ifc.get().get_inverse(item):
+                        if inverse.is_a("IfcStyledItem"):
+                            styles = inverse.Styles
+                            if styles and styles[0].is_a("IfcPresentationStyleAssignment"):
+                                styles = styles[0].Styles
+                            for style in styles:
+                                if style.is_a("IfcSurfaceStyle"):
+                                    new.surface_style = style.Name or "Unnamed"
+                                    break
+
+
+class DisableEditingRepresentationItems(bpy.types.Operator, Operator):
+    bl_idname = "bim.disable_editing_representation_items"
+    bl_label = "Disable Editing Representation Items"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        obj = context.active_object
+        obj.BIMGeometryProperties.is_editing = False

src/blenderbim/blenderbim/bim/module/geometry/prop.py

@@ -38,8 +38,17 @@ def get_contexts(self, context):
     return RepresentationsData.data["contexts"]
 
 
+class RepresentationItem(PropertyGroup):
+    name: StringProperty(name="Name")
+    surface_style: StringProperty(name="Surface Style")
+    ifc_definition_id: IntProperty(name="IFC Definition ID")
+
+
 class BIMObjectGeometryProperties(PropertyGroup):
     contexts: EnumProperty(items=get_contexts, name="Contexts")
+    is_editing: BoolProperty(name="Is Editing", default=False)
+    items: CollectionProperty(name="Representation Items", type=RepresentationItem)
+    active_item_index: IntProperty(name="Active Representation Item Index")
 
 
 class BIMGeometryProperties(PropertyGroup):

src/blenderbim/blenderbim/bim/module/geometry/ui.py

@@ -18,11 +18,12 @@
 
 import bpy
 import blenderbim.tool as tool
-from bpy.types import Panel, Menu
+from bpy.types import Panel, Menu, UIList
 from blenderbim.bim.ifc import IfcStore
 from blenderbim.bim.helper import prop_with_search
 from blenderbim.bim.module.geometry.data import (
     RepresentationsData,
+    RepresentationItemsData,
     ConnectionsData,
     PlacementData,
     DerivedCoordinatesData,
@@ -129,6 +130,41 @@ class BIM_PT_representations(Panel):
             row.operator("bim.remove_representation", icon="X", text="").representation_id = representation["id"]
 
 
+class BIM_PT_representation_items(Panel):
+    bl_label = "Representation Items"
+    bl_idname = "BIM_PT_representation_items"
+    bl_space_type = "PROPERTIES"
+    bl_region_type = "WINDOW"
+    bl_context = "scene"
+    bl_order = 1
+    bl_parent_id = "BIM_PT_tab_representations"
+
+    @classmethod
+    def poll(cls, context):
+        if not context.active_object:
+            return False
+        if not IfcStore.get_element(context.active_object.BIMObjectProperties.ifc_definition_id):
+            return False
+        return IfcStore.get_file()
+
+    def draw(self, context):
+        if not RepresentationItemsData.is_loaded:
+            RepresentationItemsData.load()
+
+        props = context.active_object.BIMGeometryProperties
+
+        row = self.layout.row(align=True)
+        row.label(text=f"{RepresentationItemsData.data['total_items']} Items Found")
+
+        if props.is_editing:
+            row.operator("bim.disable_editing_representation_items", icon="CANCEL", text="")
+        else:
+            row.operator("bim.enable_editing_representation_items", icon="IMPORT", text="")
+            return
+
+        self.layout.template_list("BIM_UL_representation_items", "", props, "items", props, "active_item_index")
+
+
 class BIM_PT_connections(Panel):
     bl_label = "Connections"
     bl_idname = "BIM_PT_connections"
@@ -267,7 +303,7 @@ class BIM_PT_mesh(Panel):
                 row.prop(ifc_parameter, "name", text="")
                 row.prop(ifc_parameter, "value", text="")
                 row.operator("bim.update_parametric_representation", icon="FILE_REFRESH", text="").index = index
-        
+
 
 class BIM_PT_placement(Panel):
     bl_label = "Placement"
@@ -327,7 +363,7 @@ class BIM_PT_derived_coordinates(Panel):
         row.label(text="XYZ Dimensions")
 
         row = self.layout.row(align=True)
-        row.enabled=False
+        row.enabled = False
         row.prop(context.active_object, "dimensions", text="X", index=0, slider=True)
         row.prop(context.active_object, "dimensions", text="Y", index=1, slider=True)
         row.prop(context.active_object, "dimensions", text="Z", index=2, slider=True)
@@ -379,3 +415,13 @@ class BIM_PT_workarounds(Panel):
         row.prop(props, "should_force_triangulation")
         row = self.layout.row()
         row.prop(props, "should_use_presentation_style_assignment")
+
+
+class BIM_UL_representation_items(UIList):
+    def draw_item(self, context, layout, data, item, icon, active_data, active_propname):
+        if item:
+            icon = "MATERIAL" if item.surface_style else "MESH_UVSPHERE"
+            row = layout.row(align=True)
+            row.label(text=item.name, icon=icon)
+            if item.surface_style:
+                row.label(text=item.surface_style)