Fix #2620. You can now run patches from models in memory.

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

@@ -71,7 +71,7 @@ class ExecuteIfcPatch(bpy.types.Operator):
     @classmethod
     def poll(cls, context):
         input_file = context.scene.BIMPatchProperties.ifc_patch_input
-        return os.path.isfile(input_file) and "ifc" in os.path.splitext(input_file)[1].lower()
+        return input_file or context.scene.BIMPatchProperties.should_load_from_memory
 
     def execute(self, context):
         props = context.scene.BIMPatchProperties
@@ -80,10 +80,17 @@ class ExecuteIfcPatch(bpy.types.Operator):
         else:
             arguments = [arg.get_value() for arg in props.ifc_patch_args_attr]
 
+        if props.should_load_from_memory and tool.Ifc.get():
+            input_file = props.ifc_patch_input
+            file = tool.Ifc.get()
+        else:
+            input_file = props.ifc_patch_input
+            file = ifcopenshell.open(props.ifc_patch_input)
+
         output = ifcpatch.execute(
             {
-                "input": props.ifc_patch_input,
-                "file": ifcopenshell.open(props.ifc_patch_input),
+                "input": input_file,
+                "file": file,
                 "recipe": props.ifc_patch_recipes,
                 "arguments": arguments,
                 "log": os.path.join(context.scene.BIMProperties.data_dir, "process.log"),

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

@@ -66,3 +66,4 @@ class BIMPatchProperties(PropertyGroup):
     ifc_patch_output: StringProperty(default="", name="IFC Patch Output IFC")
     ifc_patch_args: StringProperty(default="", name="Arguments")
     ifc_patch_args_attr: CollectionProperty(type=Attribute, name="Arguments")
+    should_load_from_memory: BoolProperty(default=False, name="Load from Memory")

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

@@ -16,8 +16,9 @@
 # You should have received a copy of the GNU General Public License
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
 
-from blenderbim.bim.helper import prop_with_search
 import bpy
+import blenderbim.tool as tool
+from blenderbim.bim.helper import prop_with_search
 from blenderbim.bim.helper import draw_attributes
 
 
@@ -40,9 +41,14 @@ class BIM_PT_patch(bpy.types.Panel):
         row = layout.row()
         prop_with_search(row, props, "ifc_patch_recipes")
 
-        row = layout.row(align=True)
-        row.prop(props, "ifc_patch_input")
-        row.operator("bim.select_ifc_patch_input", icon="FILE_FOLDER", text="")
+        if tool.Ifc.get():
+            row = self.layout.row()
+            row.prop(props, "should_load_from_memory")
+
+        if not tool.Ifc.get() or not props.should_load_from_memory:
+            row = layout.row(align=True)
+            row.prop(props, "ifc_patch_input")
+            row.operator("bim.select_ifc_patch_input", icon="FILE_FOLDER", text="")
 
         row = layout.row(align=True)
         row.prop(props, "ifc_patch_output")

src/blenderbim/test/bim/feature/patch.feature

@@ -1,7 +1,16 @@
 @patch
 Feature: Patch
 
-Scenario: Execute IFC Patch 
+Scenario: Execute IFC Patch - file in memory
+    Given an empty IFC project
+    And I set "scene.BIMPatchProperties.ifc_patch_recipes" to "OffsetObjectPlacements"
+    And I set "scene.BIMPatchProperties.should_load_from_memory" to "True"
+    And I set "scene.BIMPatchProperties.ifc_patch_output" to "{cwd}/test/files/basic-patched.ifc"
+    And I set "scene.BIMPatchProperties.ifc_patch_args" to "[123454321,0,0,0]"
+    When I press "bim.execute_ifc_patch(use_json_for_args=True)"
+    Then the file "{cwd}/test/files/basic-patched.ifc" should contain "123454321"
+
+Scenario: Execute IFC Patch - file from disk
     Given an empty IFC project
     And I set "scene.BIMPatchProperties.ifc_patch_recipes" to "OffsetObjectPlacements"
     And I set "scene.BIMPatchProperties.ifc_patch_input" to "{cwd}/test/files/basic.ifc"