From 510d756cc48798f0a5ffb1a16c248c64954ff1fb Mon Sep 17 00:00:00 2001
From: Dion Moult <dion@thinkmoult.com>
Date: Mon, 28 Dec 2020 13:14:33 +1100
Subject: [PATCH] Implement delete BCF topic BIM snippet

---
 src/bcf/bcf/bcfxml.py                           | 10 ++++++++++
 src/ifcblenderexport/blenderbim/bim/__init__.py |  1 +
 src/ifcblenderexport/blenderbim/bim/operator.py | 16 ++++++++++++++++
 src/ifcblenderexport/blenderbim/bim/ui.py       |  7 ++++---
 4 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/src/bcf/bcf/bcfxml.py b/src/bcf/bcf/bcfxml.py
index 92a8cc7771..31aca111ef 100644
--- a/src/bcf/bcf/bcfxml.py
+++ b/src/bcf/bcf/bcfxml.py
@@ -513,6 +513,16 @@ class BcfXml:
             os.remove(filepath)
         self.edit_topic(topic)
 
+    def delete_bim_snippet(self, topic):
+        if not topic.bim_snippet:
+            return
+        if topic.bim_snippet.reference and not topic.bim_snippet.is_external:
+            filepath = os.path.join(self.filepath, topic.guid, topic.bim_snippet.reference)
+            if os.path.exists(filepath):
+                os.remove(filepath)
+        topic.bim_snippet = None
+        self.edit_topic(topic)
+
     def add_file(self, topic, header_file):
         if os.path.exists(header_file.reference):
             topic_filepath = os.path.join(self.filepath, topic.guid)
diff --git a/src/ifcblenderexport/blenderbim/bim/__init__.py b/src/ifcblenderexport/blenderbim/bim/__init__.py
index cd0e27846f..2bd55bc823 100644
--- a/src/ifcblenderexport/blenderbim/bim/__init__.py
+++ b/src/ifcblenderexport/blenderbim/bim/__init__.py
@@ -40,6 +40,7 @@ if bpy is not None:
         operator.AddBcfLabel,
         operator.ViewBcfTopic,
         operator.RemoveBcfComment,
+        operator.RemoveBcfBimSnippet,
         operator.RemoveBcfReferenceLink,
         operator.EditBcfReferenceLinks,
         operator.EditBcfLabels,
diff --git a/src/ifcblenderexport/blenderbim/bim/operator.py b/src/ifcblenderexport/blenderbim/bim/operator.py
index d0de452d8c..d8099288e3 100644
--- a/src/ifcblenderexport/blenderbim/bim/operator.py
+++ b/src/ifcblenderexport/blenderbim/bim/operator.py
@@ -945,6 +945,22 @@ class RemoveBcfLabel(bpy.types.Operator):
         return {"FINISHED"}
 
 
+class RemoveBcfBimSnippet(bpy.types.Operator):
+    bl_idname = "bim.remove_bcf_bim_snippet"
+    bl_label = "Remove BCF BIM Snippet"
+
+    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]
+        bcfxml.delete_bim_snippet(topic)
+        blender_topic.bim_snippet.schema = ""
+        blender_topic.bim_snippet.reference = ""
+        blender_topic.bim_snippet.type = ""
+        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 f3d9e77932..76b81ba4dd 100644
--- a/src/ifcblenderexport/blenderbim/bim/ui.py
+++ b/src/ifcblenderexport/blenderbim/bim/ui.py
@@ -1807,20 +1807,21 @@ class BIM_PT_bcf_metadata(Panel):
         row = layout.row()
         row.operator("bim.add_bcf_label")
 
+        layout.label(text="BIM Snippet:")
         if topic.bim_snippet.schema:
-            layout.label(text="BIM Snippet:")
             row = layout.row(align=True)
-            row.prop(topic.bim_snippet, "type")
+            row.prop(topic.bim_snippet, "type", emboss=False)
             if topic.bim_snippet.schema:
                 row.operator("bim.open_uri", icon="URL", text="").uri = topic.bim_snippet.schema
 
             row = layout.row(align=True)
-            row.prop(topic.bim_snippet, "reference")
+            row.prop(topic.bim_snippet, "reference", emboss=False)
             if topic.bim_snippet.is_external:
                 row.operator("bim.open_uri", icon="URL", text="").uri = topic.bim_snippet.reference
             else:
                 op = row.operator("bim.open_uri", icon="FILE_FOLDER", text="")
                 op.uri = os.path.join(bcfxml.filepath, topic.name, topic.bim_snippet.reference)
+            row.operator("bim.remove_bcf_bim_snippet", icon="X", text="")
 
         if topic.document_references:
             layout.label(text="Document References:")