More options to save .ifc as relative path in blender

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

@@ -74,19 +74,21 @@ class SelectLibraryFile(bpy.types.Operator, IFCFileSelector):
     filepath: bpy.props.StringProperty(subtype="FILE_PATH")
     filter_glob: bpy.props.StringProperty(default="*.ifc;*.ifczip;*.ifcxml", options={"HIDDEN"})
     append_all: bpy.props.BoolProperty(default=False)
+    use_relative_path: bpy.props.BoolProperty(name="Use Relative Path", default=False)
 
     def execute(self, context):
         IfcStore.begin_transaction(self)
         old_filepath = IfcStore.library_path
         result = self._execute(context)
-        self.transaction_data = {"old_filepath": old_filepath, "filepath": self.filepath}
+        self.transaction_data = {"old_filepath": old_filepath, "filepath": self.get_filepath()}
         IfcStore.add_transaction_operation(self)
         IfcStore.end_transaction(self)
         return result
 
     def _execute(self, context):
-        IfcStore.library_path = self.filepath
-        IfcStore.library_file = ifcopenshell.open(self.filepath)
+        filepath = self.get_filepath()
+        IfcStore.library_path = filepath
+        IfcStore.library_file = ifcopenshell.open(filepath)
         bpy.ops.bim.refresh_library()
         if context.area:
             context.area.tag_redraw()
@@ -525,11 +527,12 @@ class LoadProject(bpy.types.Operator, IFCFileSelector):
     filepath: bpy.props.StringProperty(subtype="FILE_PATH")
     filter_glob: bpy.props.StringProperty(default="*.ifc;*.ifczip;*.ifcxml", options={"HIDDEN"})
     is_advanced: bpy.props.BoolProperty(name="Enable Advanced Mode", default=False)
+    use_relative_path: bpy.props.BoolProperty(name="Use Relative Path", default=False)
 
     def execute(self, context):
         if not self.is_existing_ifc_file():
             return {"FINISHED"}
-        context.scene.BIMProperties.ifc_file = self.filepath
+        context.scene.BIMProperties.ifc_file = self.get_filepath()
         context.scene.BIMProjectProperties.is_loading = True
         context.scene.BIMProjectProperties.total_elements = len(tool.Ifc.get().by_type("IfcElement"))
         if not self.is_advanced:

src/blenderbim/blenderbim/bim/operator.py

@@ -94,10 +94,11 @@ class SelectIfcFile(bpy.types.Operator, IFCFileSelector):
     bl_description = "Select a different IFC file"
     filepath: bpy.props.StringProperty(subtype="FILE_PATH")
     filter_glob: bpy.props.StringProperty(default="*.ifc;*.ifczip;*.ifcxml", options={"HIDDEN"})
+    use_relative_path: bpy.props.BoolProperty(name="Use Relative Path", default=False)
 
     def execute(self, context):
         if self.is_existing_ifc_file():
-            context.scene.BIMProperties.ifc_file = self.filepath
+            context.scene.BIMProperties.ifc_file = self.get_filepath()
         return {"FINISHED"}
 
     def invoke(self, context, event):
@@ -105,7 +106,7 @@ class SelectIfcFile(bpy.types.Operator, IFCFileSelector):
         return {"RUNNING_MODAL"}
 
 
-class ReloadSelectedIfcFile(bpy.types.Operator, IFCFileSelector):
+class ReloadSelectedIfcFile(bpy.types.Operator):
     bl_idname = "bim.reload_selected_ifc_file"
     bl_label = "Reload selected IFC File"
     bl_options = {"REGISTER", "UNDO"}
@@ -113,9 +114,12 @@ class ReloadSelectedIfcFile(bpy.types.Operator, IFCFileSelector):
     filepath: bpy.props.StringProperty(subtype="FILE_PATH")
 
     def execute(self, context):
-        self.filepath = context.scene.BIMProperties.ifc_file
-        if self.is_existing_ifc_file():
-            context.scene.BIMProperties.ifc_file = context.scene.BIMProperties.ifc_file
+        filepath = context.scene.BIMProperties.ifc_file
+        valid_file = os.path.exists(filepath) and "ifc" in os.path.splitext(filepath)[1].lower()
+        if not valid_file:
+            self.report({"ERROR"}, f"Couldn't find .ifc file by the path '{filepath}'")
+            return {"ERROR"}
+        context.scene.BIMProperties.ifc_file = context.scene.BIMProperties.ifc_file
         return {"FINISHED"}
 
 

src/blenderbim/blenderbim/bim/ui.py

@@ -39,14 +39,23 @@ class IFCFileSelector:
             filepath = self.filepath
         return os.path.exists(filepath) and "ifc" in os.path.splitext(filepath)[1].lower()
 
+    def get_filepath(self):
+        """get filepath taking into account relative paths"""
+        if self.use_relative_path:
+            filepath = os.path.relpath(self.filepath, bpy.path.abspath("//"))
+        else:
+            filepath = self.filepath
+        return filepath
+
     def draw(self, context):
         # Access filepath & Directory https://blender.stackexchange.com/a/207665
         params = context.space_data.params
         # Decode byte string https://stackoverflow.com/a/47737082/
         directory = Path(params.directory.decode("utf-8"))
         filepath = os.path.join(directory, params.filename)
+        layout = self.layout
         if self.is_existing_ifc_file(filepath):
-            box = self.layout.box()
+            box = layout.box()
             box.label(text="IFC Header Specifications", icon="INFO")
             header_data = IfcHeaderExtractor(filepath).extract()
             for key, value in header_data.items():
@@ -65,6 +74,13 @@ class IFCFileSelector:
                         op.outfile = filepath[0:-4] + "-IFC4.ifc"
                         op.schema = "IFC4"
 
+        if bpy.data.is_saved:
+            layout.prop(self, "use_relative_path")
+        else:
+            self.use_relative_path = False
+            layout.label(text="Save the .blend file first ")
+            layout.label(text="to use relative paths for .ifc.")
+
 
 class BIM_PT_section_plane(Panel):
     bl_label = "Temporary Section Cutaways"