Header data previews for IFCZIP are now supported as well.

src/blenderbim/blenderbim/bim/helper.py

@@ -19,6 +19,7 @@
 import bpy
 import json
 import math
+import zipfile
 import ifcopenshell
 import ifcopenshell.util.attribute
 from mathutils import geometry
@@ -99,35 +100,44 @@ def export_attributes(props, callback=None):
     return attributes
 
 
-class IFCHeaderSpecs:
+class IfcHeaderExtractor:
     def __init__(self, filepath: str):
-        # According to https://www.steptools.com/stds/step/IS_final_p21e3.html#clause-8
+        self.filepath = filepath
-        self.description = ""
+
-        self.implementation_level = ""
+    def extract(self):
-        self.name = ""
+        extension = self.filepath.split(".")[-1]
-        self.time_stamp = ""
+        if extension.lower() == "ifc":
-        self.author = ""
+            with open(self.filepath) as ifc_file:
-        self.organization = ""
+                return self.extract_ifc_spf(ifc_file)
-        self.preprocessor_version = ""
+        elif extension.lower() == "ifczip":
-        self.originating_system = ""
+            return self.extract_ifc_zip()
-        self.authorization = ""
+
-        self.schema_name = ""
+    def extract_ifc_spf(self, ifc_file):
-        with open(filepath) as ifc_file:
+        # https://www.steptools.com/stds/step/IS_final_p21e3.html#clause-8
-            max_lines_to_parse = 50
+        data = {}
-            for _ in range(max_lines_to_parse):
+        max_lines_to_parse = 50
-                line = next(ifc_file)
+        for _ in range(max_lines_to_parse):
-                if line.startswith("FILE_DESCRIPTION"):
+            line = next(ifc_file)
-                    for i, part in enumerate(line.split("'")):
+            if isinstance(line, bytes):
-                        if i == 1:
+                line = line.decode("utf-8")
-                            self.description = part
+            print(line)
-                        elif i == 3:
+            if line.startswith("FILE_DESCRIPTION"):
-                            self.implementation_level = part
+                for i, part in enumerate(line.split("'")):
-                elif line.startswith("FILE_NAME"):
+                    if i == 1:
-                    for i, part in enumerate(line.split("'")):
+                        data["description"] = part
-                        if i == 1:
+                    elif i == 3:
-                            self.name = part
+                        data["implementation_level"] = part
-                        elif i == 3:
+            elif line.startswith("FILE_NAME"):
-                            self.time_stamp = part
+                for i, part in enumerate(line.split("'")):
-                elif line.startswith("FILE_SCHEMA"):
+                    if i == 1:
-                    self.schema_name = line.split("'")[1]
+                        data["name"] = part
-                    break
+                    elif i == 3:
+                        data["time_stamp"] = part
+            elif line.startswith("FILE_SCHEMA"):
+                data["schema_name"] = line.split("'")[1]
+                break
+        return data
+
+    def extract_ifc_zip(self):
+        archive = zipfile.ZipFile(self.filepath, "r")
+        return self.extract_ifc_spf(archive.open(archive.filelist[0]))

src/blenderbim/blenderbim/bim/ui.py

@@ -22,7 +22,7 @@ from pathlib import Path
 from . import ifc
 from bpy.types import Panel
 from bpy.props import StringProperty, IntProperty, BoolProperty
-from blenderbim.bim.helper import IFCHeaderSpecs
+from blenderbim.bim.helper import IfcHeaderExtractor
 import blenderbim.tool as tool
 
 
@@ -41,15 +41,15 @@ class IFCFileSelector:
         if self.is_existing_ifc_file(filepath):
             box = self.layout.box()
             box.label(text="IFC Header Specifications", icon="INFO")
-            ifc_specs = IFCHeaderSpecs(filepath)
+            header_data = IfcHeaderExtractor(filepath).extract()
-            for attr_name, attr_value in ifc_specs.__dict__.items():
+            for key, value in header_data.items():
-                if attr_value != "":
+                if value != "":
                     split = box.split()
-                    split.label(text=attr_name.title().replace("_", " "))
+                    split.label(text=key.title().replace("_", " "))
-                    split.label(text=str(attr_value))
+                    split.label(text=str(value))
                     if (
-                        attr_name.lower() == "schema_name"
+                        key.lower() == "schema_name"
-                        and str(attr_value).lower() == "ifc2x3"
+                        and str(value).lower() == "ifc2x3"
                         and filepath[-4:].lower() == ".ifc"
                     ):
                         row = box.row()