From b9583c562d4067c0d30206f72f31795552b25c21 Mon Sep 17 00:00:00 2001
From: Dion Moult <dion@thinkmoult.com>
Date: Sun, 27 Dec 2020 16:53:40 +1100
Subject: [PATCH] Implement support for deleting reference links

---
 .../blenderbim/bim/__init__.py                |  1 +
 .../blenderbim/bim/operator.py                | 23 +++++++++++++++++--
 src/ifcblenderexport/blenderbim/bim/ui.py     |  1 +
 3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/src/ifcblenderexport/blenderbim/bim/__init__.py b/src/ifcblenderexport/blenderbim/bim/__init__.py
index e388735cf7..16b5b0dba3 100644
--- a/src/ifcblenderexport/blenderbim/bim/__init__.py
+++ b/src/ifcblenderexport/blenderbim/bim/__init__.py
@@ -38,6 +38,7 @@ if bpy is not None:
         operator.AddBcfHeaderFile,
         operator.ViewBcfTopic,
         operator.RemoveBcfComment,
+        operator.RemoveBcfReferenceLink,
         operator.EditBcfComment,
         operator.AddBcfComment,
         operator.ActivateBcfViewpoint,
diff --git a/src/ifcblenderexport/blenderbim/bim/operator.py b/src/ifcblenderexport/blenderbim/bim/operator.py
index d2af9239aa..7fa8272628 100644
--- a/src/ifcblenderexport/blenderbim/bim/operator.py
+++ b/src/ifcblenderexport/blenderbim/bim/operator.py
@@ -743,8 +743,10 @@ class AddBcfHeaderFile(bpy.types.Operator):
         header_file.reference = blender_topic.file_reference
         if not os.path.exists(header_file.reference):
             header_file.filename = header_file.reference
-        header_file.ifc_project = blender_topic.file_ifc_project
-        header_file.ifc_spatial_structure_element = blender_topic.file_ifc_spatial_structure_element
+        if len(blender_topic.file_ifc_project) == 22:
+            header_file.ifc_project = blender_topic.file_ifc_project
+        if len(blender_topic.file_ifc_spatial_structure_element) == 22:
+            header_file.ifc_spatial_structure_element = blender_topic.file_ifc_spatial_structure_element
         bcfxml.add_file(topic, header_file)
         props.active_topic_index = props.active_topic_index # refreshes the BCF Topic
         return {"FINISHED"}
@@ -839,6 +841,23 @@ class RemoveBcfFile(bpy.types.Operator):
         return {"FINISHED"}
 
 
+class RemoveBcfReferenceLink(bpy.types.Operator):
+    bl_idname = "bim.remove_bcf_reference_link"
+    bl_label = "Remove BCF Reference Link"
+    index: bpy.props.IntProperty()
+
+    def execute(self, context):
+        bcfxml = bcfstore.BcfStore.get_bcfxml()
+        props = bpy.context.scene.BCFProperties
+        blender_topic = props.topics[props.active_topic_index]
+        topic = bcfxml.topics[blender_topic.name]
+        del topic.reference_links[self.index]
+        bcfxml.edit_topic(topic)
+        blender_topic.reference_links.remove(self.index)
+        props.active_topic_index = props.active_topic_index # Refreshes the BCF Topic
+        return {"FINISHED"}
+
+
 class RemoveBcfComment(bpy.types.Operator):
     bl_idname = "bim.remove_bcf_comment"
     bl_label = "Remove BCF Comment"
diff --git a/src/ifcblenderexport/blenderbim/bim/ui.py b/src/ifcblenderexport/blenderbim/bim/ui.py
index 64a1b7fe26..1beaf049ac 100644
--- a/src/ifcblenderexport/blenderbim/bim/ui.py
+++ b/src/ifcblenderexport/blenderbim/bim/ui.py
@@ -1791,6 +1791,7 @@ class BIM_PT_bcf_metadata(Panel):
                 row = layout.row(align=True)
                 row.prop(link, "name")
                 row.operator("bim.open_uri", icon="URL", text="").uri = link.name
+                row.operator("bim.remove_bcf_reference_link", icon="X", text="").index = index
 
         if topic.labels:
             layout.label(text="Labels:")