IfcOpenShell/src/ifcblenderexport/blenderbim/bim/operator.py

import os
import bpy
import uuid
import time
import json
import logging
import webbrowser
import ifcopenshell
import ifcopenshell.util.selector
import ifcopenshell.util.geolocation
import tempfile
from . import export_ifc
from . import import_ifc
from . import qto
from . import cut_ifc
from . import svgwriter
from . import sheeter
from . import scheduler
from . import schema
from . import bcf
from . import ifc
from . import annotation
from . import helper
from bpy_extras.io_utils import ImportHelper
from itertools import cycle
from mathutils import Vector, Matrix, Euler, geometry
from math import radians, atan, tan, cos, sin, atan2, pi
from pathlib import Path
from bpy.app.handlers import persistent

colour_list = [
    (.651, .81, .892, 1),
    (.121, .471, .706, 1),
    (.699, .876, .54, 1),
    (.199, .629, .174, 1),
    (.983, .605, .602, 1),
    (.89, .101, .112, 1),
    (.989, .751, .427, 1),
    (.986, .497, .1, 1),
    (.792, .699, .839, 1),
    (.414, .239, .603, 1),
    (.993, .999, .6, 1),
    (.693, .349, .157, 1)]


@persistent
def depsgraph_update_pre_handler(scene):
    set_active_camera_resolution(scene)


def set_active_camera_resolution(scene):
    if not scene.camera \
            or '/' not in scene.camera.name \
            or not scene.DocProperties.drawings:
        return
    if scene.render.resolution_x != scene.camera.data.BIMCameraProperties.raster_x \
            or scene.render.resolution_y != scene.camera.data.BIMCameraProperties.raster_y:
        scene.render.resolution_x = scene.camera.data.BIMCameraProperties.raster_x
        scene.render.resolution_y = scene.camera.data.BIMCameraProperties.raster_y
    current_drawing = scene.DocProperties.drawings[scene.DocProperties.current_drawing_index]
    if scene.camera != current_drawing.camera:
        scene.DocProperties.current_drawing_index = scene.DocProperties.drawings.find(scene.camera.name.split('/')[1])
        bpy.ops.bim.activate_view(drawing_index=scene.DocProperties.current_drawing_index)


class ExportIFC(bpy.types.Operator):
    bl_idname = "export_ifc.bim"
    bl_label = "Export IFC"
    filename_ext = ".ifc"
    filepath: bpy.props.StringProperty(subtype='FILE_PATH')

    def invoke(self, context, event):
        if not self.filepath:
            self.filepath = bpy.path.ensure_ext(bpy.data.filepath, ".ifc")
        WindowManager = context.window_manager
        WindowManager.fileselect_add(self)
        return {'RUNNING_MODAL'}

    def execute(self, context):
        start = time.time()
        logger = logging.getLogger('ExportIFC')
        logging.basicConfig(
                filename=context.scene.BIMProperties.data_dir + 'process.log',
                filemode='a', level=logging.DEBUG)
        extension = self.filepath.split('.')[-1]
        if extension == 'ifczip':
            output_file = bpy.path.ensure_ext(self.filepath, '.ifczip')
        elif extension == 'ifcjson':
            output_file = bpy.path.ensure_ext(self.filepath, '.ifcjson')
        else:
            output_file = bpy.path.ensure_ext(self.filepath, '.ifc')
        ifc_export_settings = export_ifc.IfcExportSettings.factory(context, output_file, logger)
        qto_calculator = qto.QtoCalculator()
        ifc_parser = export_ifc.IfcParser(ifc_export_settings, qto_calculator)
        ifc_exporter = export_ifc.IfcExporter(ifc_export_settings, ifc_parser)
        ifc_export_settings.logger.info('Starting export')
        ifc_exporter.export(context.selected_objects)
        ifc_export_settings.logger.info('Export finished in {:.2f} seconds'.format(time.time() - start))
        if not bpy.context.scene.DocProperties.ifc_files:
            new = bpy.context.scene.DocProperties.ifc_files.add()
            new.name = output_file
        return {'FINISHED'}

class ImportIFC(bpy.types.Operator, ImportHelper):
    bl_idname = "import_ifc.bim"
    bl_label = "Import IFC"
    filename_ext = ".ifc"
    filter_glob: bpy.props.StringProperty(default="*.ifc;*.ifczip;*.ifcxml", options={'HIDDEN'})

    def execute(self, context):
        start = time.time()
        logger = logging.getLogger('ImportIFC')
        logging.basicConfig(
            filename=bpy.context.scene.BIMProperties.data_dir + 'process.log',
            filemode='a', level=logging.DEBUG)
        ifc_import_settings = import_ifc.IfcImportSettings.factory(context, self.filepath, logger)
        ifc_import_settings.logger.info('Starting import')
        ifc_importer = import_ifc.IfcImporter(ifc_import_settings)
        ifc_importer.execute()
        ifc_import_settings.logger.info('Import finished in {:.2f} seconds'.format(time.time() - start))
        print('Import finished in {:.2f} seconds'.format(time.time() - start))
        return {'FINISHED'}

class SelectGlobalId(bpy.types.Operator):
    bl_idname = 'bim.select_global_id'
    bl_label = 'Select GlobalId'

    def execute(self, context):
        for obj in bpy.context.visible_objects:
            index = obj.BIMObjectProperties.attributes.find('GlobalId')
            if index != -1 \
                    and obj.BIMObjectProperties.attributes[index].string_value == bpy.context.scene.BIMProperties.global_id:
                obj.select_set(True)
                break
        return {'FINISHED'}

class SelectAttribute(bpy.types.Operator):
    bl_idname = 'bim.select_attribute'
    bl_label = 'Select Attribute'

    def execute(self, context):
        import re
        search_value = bpy.context.scene.BIMProperties.search_attribute_value
        for object in bpy.context.visible_objects:
            index = object.BIMObjectProperties.attributes.find(bpy.context.scene.BIMProperties.search_attribute_name)
            if index == -1:
                continue
            value = object.BIMObjectProperties.attributes[index].string_value
            if bpy.context.scene.BIMProperties.search_regex \
                    and bpy.context.scene.BIMProperties.search_ignorecase \
                    and re.search(search_value, value, flags=re.IGNORECASE):
                object.select_set(True)
            elif bpy.context.scene.BIMProperties.search_regex \
                    and re.search(search_value, value):
                object.select_set(True)
            elif bpy.context.scene.BIMProperties.search_ignorecase \
                    and value.lower() == search_value.lower():
                object.select_set(True)
            elif value == search_value:
                object.select_set(True)
        return {'FINISHED'}


class SelectPset(bpy.types.Operator):
    bl_idname = 'bim.select_pset'
    bl_label = 'Select Pset'

    def execute(self, context):
        import re
        search_pset_name = bpy.context.scene.BIMProperties.search_pset_name
        search_prop_name = bpy.context.scene.BIMProperties.search_prop_name
        search_value = bpy.context.scene.BIMProperties.search_pset_value
        for object in bpy.context.visible_objects:
            pset_index = object.BIMObjectProperties.psets.find(search_pset_name)
            if pset_index == -1:
                continue
            prop_index = object.BIMObjectProperties.psets[pset_index].properties.find(search_prop_name)
            if prop_index == -1:
                continue
            value = object.BIMObjectProperties.psets[pset_index].properties[prop_index].string_value
            if bpy.context.scene.BIMProperties.search_regex \
                    and bpy.context.scene.BIMProperties.search_ignorecase \
                    and re.search(search_value, value, flags=re.IGNORECASE):
                object.select_set(True)
            elif bpy.context.scene.BIMProperties.search_regex \
                    and re.search(search_value, value):
                object.select_set(True)
            elif bpy.context.scene.BIMProperties.search_ignorecase \
                    and value.lower() == search_value.lower():
                object.select_set(True)
            elif value == search_value:
                object.select_set(True)
        return {'FINISHED'}


class AssignClass(bpy.types.Operator):
    bl_idname = 'bim.assign_class'
    bl_label = 'Assign IFC Class'
    object_name: bpy.props.StringProperty()

    def execute(self, context):
        if self.object_name:
            objects = [bpy.data.objects.get(self.object_name)]
        else:
            objects = bpy.context.selected_objects
        for obj in objects:
            existing_class = None
            if '/' in obj.name \
                    and obj.name[0:3] == 'Ifc':
                existing_class = obj.name.split('/')[0]
            if existing_class:
                obj.name = '{}/{}'.format(
                    bpy.context.scene.BIMProperties.ifc_class,
                    obj.name.split('/')[1])
            else:
                obj.name = '{}/{}'.format(
                    bpy.context.scene.BIMProperties.ifc_class,
                    obj.name)
            predefined_type_index = obj.BIMObjectProperties.attributes.find('PredefinedType')
            if predefined_type_index >= 0:
                obj.BIMObjectProperties.attributes.remove(predefined_type_index)
            object_type_index = obj.BIMObjectProperties.attributes.find('ObjectType')
            if object_type_index >= 0:
                obj.BIMObjectProperties.attributes.remove(object_type_index)
            if bpy.context.scene.BIMProperties.ifc_predefined_type:
                predefined_type = obj.BIMObjectProperties.attributes.add()
                predefined_type.name = 'PredefinedType'
                predefined_type.string_value = bpy.context.scene.BIMProperties.ifc_predefined_type # TODO: make it an enum
            if bpy.context.scene.BIMProperties.ifc_predefined_type == 'USERDEFINED':
                object_type = obj.BIMObjectProperties.attributes.add()
                object_type.name = 'ObjectType'
                object_type.string_value = bpy.context.scene.BIMProperties.ifc_userdefined_type
            if bpy.context.scene.BIMProperties.ifc_product == 'IfcElementType':
                for project in [c for c in bpy.context.view_layer.layer_collection.children if 'IfcProject' in c.name]:
                    if not [c for c in project.children if 'Types' in c.name]:
                        types = bpy.data.collections.new('Types')
                        project.collection.children.link(types)
                    for collection in [c for c in project.children if 'Types' in c.name]:
                        for user_collection in obj.users_collection:
                            user_collection.objects.unlink(obj)
                        collection.collection.objects.link(obj)
                        break
                    break
        return {'FINISHED'}


class UnassignClass(bpy.types.Operator):
    bl_idname = 'bim.unassign_class'
    bl_label = 'Unassign IFC Class'
    object_name: bpy.props.StringProperty()

    def execute(self, context):
        if self.object_name:
            objects = [bpy.data.objects.get(self.object_name)]
        else:
            objects = bpy.context.selected_objects
        for obj in objects:
            existing_class = None
            if '/' in obj.name \
                    and obj.name[0:3] == 'Ifc':
                obj.name = '/'.join(obj.name.split('/')[1:])
        return {'FINISHED'}


class SelectClass(bpy.types.Operator):
    bl_idname = 'bim.select_class'
    bl_label = 'Select IFC Class'

    def execute(self, context):
        for object in bpy.context.visible_objects:
            if '/' in object.name \
                and object.name[0:3] == 'Ifc' \
                and object.name.split('/')[0] == bpy.context.scene.BIMProperties.ifc_class:
                object.select_set(True)
        return {'FINISHED'}

class SelectType(bpy.types.Operator):
    bl_idname = 'bim.select_type'
    bl_label = 'Select IFC Type'

    def execute(self, context):
        for object in bpy.context.visible_objects:
            if '/' in object.name \
                    and object.name[0:3] == 'Ifc' \
                    and object.name.split('/')[0] == bpy.context.scene.BIMProperties.ifc_class \
                    and 'PredefinedType' in object.BIMObjectProperties.attributes \
                    and object.BIMObjectProperties.attributes['PredefinedType'].string_value == bpy.context.scene.BIMProperties.ifc_predefined_type:
                if bpy.context.scene.BIMProperties.ifc_predefined_type != 'USERDEFINED':
                    object.select_set(True)
                elif 'ObjectType' in object.BIMObjectProperties.attributes \
                        and object.BIMObjectProperties.attributes['ObjectType'].string_value == bpy.context.scene.BIMProperties.ifc_userdefined_type:
                    object.select_set(True)
        return {'FINISHED'}

class ColourByClass(bpy.types.Operator):
    bl_idname = 'bim.colour_by_class'
    bl_label = 'Colour by Class'

    def execute(self, context):
        colours = cycle(colour_list)
        ifc_classes = {}
        for obj in bpy.context.visible_objects:
            if '/' not in obj.name:
                continue
            ifc_class = obj.name.split('/')[0]
            if ifc_class not in ifc_classes:
                ifc_classes[ifc_class] = next(colours)
            obj.color = ifc_classes[ifc_class]
        area = next(area for area in bpy.context.screen.areas if area.type == 'VIEW_3D')
        area.spaces[0].shading.color_type = 'OBJECT'
        return {'FINISHED'}


class ColourByAttribute(bpy.types.Operator):
    bl_idname = 'bim.colour_by_attribute'
    bl_label = 'Colour by Attribute'

    def execute(self, context):
        colours = cycle(colour_list)
        values = {}
        attribute_name = bpy.context.scene.BIMProperties.search_attribute_name
        for obj in bpy.context.visible_objects:
            index = obj.BIMObjectProperties.attributes.find(attribute_name)
            if index == -1:
                continue
            value = obj.BIMObjectProperties.attributes[index].string_value
            if value not in values:
                values[value] = next(colours)
            obj.color = values[value]
        area = next(area for area in bpy.context.screen.areas if area.type == 'VIEW_3D')
        area.spaces[0].shading.color_type = 'OBJECT'
        return {'FINISHED'}


class ColourByPset(bpy.types.Operator):
    bl_idname = 'bim.colour_by_pset'
    bl_label = 'Colour by Pset'

    def execute(self, context):
        colours = cycle(colour_list)
        values = {}
        search_pset_name = bpy.context.scene.BIMProperties.search_pset_name
        search_prop_name = bpy.context.scene.BIMProperties.search_prop_name
        for obj in bpy.context.visible_objects:
            pset_index = obj.BIMObjectProperties.psets.find(search_pset_name)
            if pset_index == -1:
                continue
            prop_index = obj.BIMObjectProperties.psets[pset_index].properties.find(search_prop_name)
            if prop_index == -1:
                continue
            value = obj.BIMObjectProperties.psets[pset_index].properties[prop_index].string_value
            if value not in values:
                values[value] = next(colours)
            obj.color = values[value]
        area = next(area for area in bpy.context.screen.areas if area.type == 'VIEW_3D')
        area.spaces[0].shading.color_type = 'OBJECT'
        return {'FINISHED'}


class ResetObjectColours(bpy.types.Operator):
    bl_idname = 'bim.reset_object_colours'
    bl_label = 'Reset Colours'

    def execute(self, context):
        for object in bpy.context.selected_objects:
            object.color = (1, 1, 1, 1)
        return {'FINISHED'}


class QAHelper():
    @classmethod
    def append_to_scenario(cls, lines):
        filename = os.path.join(
            bpy.context.scene.BIMProperties.features_dir,
            bpy.context.scene.BIMProperties.features_file + '.feature')
        if os.path.exists(filename+'~'):
            os.remove(filename+'~')
        os.rename(filename, filename+'~')
        with open(filename, 'w') as destination:
            with open(filename+'~', 'r') as source:
                is_in_scenario = False
                for source_line in source:
                    if 'Scenario: 'in source_line \
                            and bpy.context.scene.BIMProperties.scenario == source_line.strip()[len('Scenario: '):]:
                        is_in_scenario = True
                    elif is_in_scenario:
                        for line in lines:
                            destination.write(line + '\n')
                        is_in_scenario = False
                    destination.write(source_line)
        os.remove(filename+'~')


class ApproveClass(bpy.types.Operator):
    bl_idname = 'bim.approve_class'
    bl_label = 'Approve Class'

    def execute(self, context):
        lines = []
        for object in bpy.context.selected_objects:
            index = object.BIMObjectProperties.attributes.find('GlobalId')
            if index != -1:
                lines.append(' * The element {} is an {}'.format(
                    object.BIMObjectProperties.attributes[index].string_value,
                    object.name.split('/')[0]))
        QAHelper.append_to_scenario(lines)
        return {'FINISHED'}


class RejectClass(bpy.types.Operator):
    bl_idname = 'bim.reject_class'
    bl_label = 'Reject Class'

    def execute(self, context):
        lines = []
        for object in bpy.context.selected_objects:
            lines.append(' * The element {} is an {}'.format(
                object.BIMObjectProperties.attributes[
                    object.BIMObjectProperties.attributes.find('GlobalId')].string_value,
                bpy.context.scene.BIMProperties.audit_ifc_class))
        QAHelper.append_to_scenario(lines)
        return {'FINISHED'}


class RejectElement(bpy.types.Operator):
    bl_idname = 'bim.reject_element'
    bl_label = 'Reject Element'

    def execute(self, context):
        lines = []
        for object in bpy.context.selected_objects:
            lines.append(' * The element {} should not exist because {}'.format(
                object.BIMObjectProperties.attributes[
                    object.BIMObjectProperties.attributes.find('GlobalId')].string_value,
                bpy.context.scene.BIMProperties.qa_reject_element_reason))
        QAHelper.append_to_scenario(lines)
        return {'FINISHED'}


class GetBcfTopics(bpy.types.Operator):
    bl_idname = 'bim.get_bcf_topics'
    bl_label = 'Get BCF Topics'

    def execute(self, context):
        import bcfplugin
        bcfplugin.openProject(bpy.context.scene.BCFProperties.bcf_file)
        bcf.BcfStore.topics = bcfplugin.getTopics()
        while len(bpy.context.scene.BCFProperties.topics) > 0:
            bpy.context.scene.BCFProperties.topics.remove(0)
        for topic in bcf.BcfStore.topics:
            new = bpy.context.scene.BCFProperties.topics.add()
            new.name = topic[0]
        return {'FINISHED'}


class ViewBcfTopic(bpy.types.Operator):
    bl_idname = 'bim.view_bcf_topic'
    bl_label = 'Get BCF Topic'
    topic_guid: bpy.props.StringProperty()

    def execute(self, context):
        for index, topic in enumerate(bcf.BcfStore.topics):
            if str(topic[1].xmlId) == self.topic_guid:
                bpy.context.scene.BCFProperties.active_topic_index = index
        return {'FINISHED'}


class ActivateBcfViewpoint(bpy.types.Operator):
    bl_idname = 'bim.activate_bcf_viewpoint'
    bl_label = 'Activate BCF Viewpoint'

    def execute(self, context):
        import bcfplugin

        topics = bcf.BcfStore.topics
        if not topics:
            return {'FINISHED'}
        topic = topics[bpy.context.scene.BCFProperties.active_topic_index][1]
        viewpoints = bcf.BcfStore.viewpoints
        if not viewpoints:
            return {'FINISHED'}
        viewpoint_reference = viewpoints[int(bpy.context.scene.BCFProperties.viewpoints)][1]
        viewpoint = viewpoint_reference.viewpoint

        obj = bpy.data.objects.get('Viewpoint')
        if not obj:
            obj = bpy.data.objects.new('Viewpoint', bpy.data.cameras.new('Viewpoint'))
            bpy.context.scene.collection.objects.link(obj)
            bpy.context.scene.camera = obj

        cam_width = bpy.context.scene.render.resolution_x
        cam_height = bpy.context.scene.render.resolution_y
        cam_aspect = cam_width / cam_height

        if viewpoint_reference.snapshot:
            obj.data.show_background_images = True
            while len(obj.data.background_images) > 0:
                obj.data.background_images.remove(obj.data.background_images[0])
            background = obj.data.background_images.new()
            background.image = bpy.data.images.load(os.path.join(
                bcfplugin.util.getBcfDir(),
                str(topic.xmlId),
                viewpoint_reference.snapshot.uri
            ))
            src_width = background.image.size[0]
            src_height = background.image.size[1]
            src_aspect = src_width / src_height

            if src_aspect > cam_aspect:
                background.frame_method = 'FIT'
            else:
                background.frame_method = 'CROP'
            background.display_depth = 'FRONT'
        area = next(area for area in bpy.context.screen.areas if area.type == 'VIEW_3D')
        area.spaces[0].region_3d.view_perspective = 'CAMERA'

        if viewpoint.oCamera:
            camera = viewpoint.oCamera
            obj.data.type = 'ORTHO'
            obj.data.ortho_scale = viewpoint.oCamera.viewWorldScale
        elif viewpoint.pCamera:
            camera = viewpoint.pCamera
            obj.data.type = 'PERSP'
            if cam_aspect >= 1:
                obj.data.angle = radians(camera.fieldOfView)
            else:
                # https://blender.stackexchange.com/questions/23431/how-to-set-camera-horizontal-and-vertical-fov
                obj.data.angle = 2 * atan((0.5 * cam_height) / (0.5 * cam_width / tan(radians(camera.fieldOfView)/2)))

        self.set_viewpoint_components(viewpoint)

        gp = bpy.data.grease_pencils.get('BCF')
        if gp:
            bpy.data.grease_pencils.remove(gp)
        if viewpoint.lines:
            self.draw_lines(viewpoint)

        self.delete_clipping_planes()
        if viewpoint.clippingPlanes:
            self.create_clipping_planes(viewpoint)

        self.delete_bitmaps()
        if viewpoint.bitmaps:
            self.create_bitmaps(viewpoint)

        z_axis = Vector((-camera.direction.x, -camera.direction.y, -camera.direction.z)).normalized()
        y_axis = Vector((camera.upVector.x, camera.upVector.y, camera.upVector.z)).normalized()
        x_axis = y_axis.cross(z_axis).normalized()
        rotation = Matrix((x_axis, y_axis, z_axis))
        rotation.invert()
        location = Vector((camera.viewPoint.x, camera.viewPoint.y, camera.viewPoint.z))
        obj.matrix_world = rotation.to_4x4()
        obj.location = location
        return {'FINISHED'}

    def set_viewpoint_components(self, viewpoint):
        selected_global_ids = [s.ifcId for s in viewpoint.components.selection]
        exception_global_ids = [v.ifcId for v in viewpoint.components.visibilityExceptions]
        global_id_colours = {}
        for colouring in viewpoint.components.colouring:
            for component in colouring.components:
                global_id_colours.setdefault(component.ifcId, colouring.colour)

        for obj in bpy.data.objects:
            global_id = obj.BIMObjectProperties.attributes.get('GlobalId')
            if not global_id:
                continue
            global_id = global_id.string_value
            is_visible = viewpoint.components.visibilityDefault
            if global_id in exception_global_ids:
                is_visible = not is_visible
            if not is_visible:
                obj.hide_set(True)
                continue
            if 'IfcSpace' in obj.name:
                is_visible = viewpoint.components.viewSetuphints.spacesVisible
            elif 'IfcOpeningElement' in obj.name:
                is_visible = viewpoint.components.viewSetuphints.openingsVisible
            obj.hide_set(not is_visible)
            if not is_visible:
                continue
            obj.select_set(global_id in selected_global_ids)
            if global_id in global_id_colours:
                obj.color = self.hex_to_rgb(global_id_colours[global_id])

    def draw_lines(self, viewpoint):
        gp = bpy.data.grease_pencils.new('BCF')
        scene = bpy.context.scene
        scene.grease_pencil = gp
        scene.frame_set(1)
        layer = gp.layers.new('BCF Annotation', set_active=True)
        layer.thickness = 3
        layer.color = (1, 0, 0)
        frame = layer.frames.new(1)
        stroke = frame.strokes.new()
        stroke.display_mode = '3DSPACE'
        stroke.points.add(len(viewpoint.lines)*2)
        coords = []
        for l in viewpoint.lines:
            coords.extend([l.start.x, l.start.y, l.start.z, l.end.x, l.end.y, l.end.z])
        stroke.points.foreach_set('co', coords)

    def create_clipping_planes(self, viewpoint):
        n = 0
        for plane in viewpoint.clippingPlanes:
            bpy.ops.bim.add_section_plane()
            if n == 0:
                obj = bpy.data.objects['Section']
            else:
                obj = bpy.data.objects['Section.{:03d}'.format(n)]
            obj.location = (plane.location.x, plane.location.y, plane.location.z)
            obj.rotation_mode = 'QUATERNION'
            obj.rotation_quaternion = Vector(
                    (plane.direction.x, plane.direction.y, plane.direction.z)
                ).to_track_quat('Z', 'Y')
            n += 1

    def delete_clipping_planes(self):
        collection = bpy.data.collections.get('Sections')
        if not collection:
            return
        for section in collection.objects:
            bpy.context.view_layer.objects.active = section
            bpy.ops.bim.remove_section_plane()

    def delete_bitmaps(self):
        collection = bpy.data.collections.get('Bitmaps')
        if not collection:
            collection = bpy.data.collections.new('Bitmaps')
            bpy.context.scene.collection.children.link(collection)
        for bitmap in collection.objects:
            bpy.data.objects.remove(bitmap)

    def create_bitmaps(self, viewpoint):
        import bcfplugin
        topics = bcf.BcfStore.topics
        topic = topics[bpy.context.scene.BCFProperties.active_topic_index][1]
        collection = bpy.data.collections.get('Bitmaps')
        if not collection:
            collection = bpy.data.collections.new('Bitmaps')
        for bitmap in viewpoint.bitmaps:
            obj = bpy.data.objects.new('Bitmap', None)
            obj.empty_display_type = 'IMAGE'
            image = bpy.data.images.load(os.path.join(
                bcfplugin.util.getBcfDir(),
                str(topic.xmlId),
                bitmap.reference
            ))
            src_width = image.size[0]
            src_height = image.size[1]
            if src_height > src_width:
                obj.empty_display_size = bitmap.height
            else:
                obj.empty_display_size = bitmap.height * (src_width / src_height)
            obj.data = image
            y = Vector((bitmap.upVector.x, bitmap.upVector.y, bitmap.upVector.z))
            z = Vector((bitmap.normal.x, bitmap.normal.y, bitmap.normal.z))
            x = y.cross(z)
            obj.matrix_world = Matrix([
                [x[0], y[0], z[0], 0],
                [x[1], y[1], z[1], 0],
                [x[2], y[2], z[2], 0],
                [0, 0, 0, 1]
            ])
            obj.location = (bitmap.location.x, bitmap.location.y, bitmap.location.z)
            collection.objects.link(obj)

    def hex_to_rgb(self, value):
        value = value.lstrip('#')
        lv = len(value)
        t = tuple(int(value[i:i+lv//3], 16) for i in range(0, lv, lv//3))
        return [t[0]/255., t[1]/255., t[2]/255., 1]

class OpenBcfFileReference(bpy.types.Operator):
    bl_idname = 'bim.open_bcf_file_reference'
    bl_label = 'Open BCF File Reference'
    data: bpy.props.StringProperty()

    def execute(self, context):
        if '/' not in self.data:
            webbrowser.open(bpy.context.scene.BCFProperties.topic_files[int(self.data)].reference)
            return {'FINISHED'}
        import bcfplugin
        topic_guid, index = self.data.split('/')
        path = os.path.join(
            bcfplugin.util.getBcfDir(), topic_guid)
        #   bpy.context.scene.BCFProperties.topic_files[int(index)].reference)
        # TODO - maybe allow immediate importing?
        webbrowser.open(path)
        return {'FINISHED'}


class OpenBcfReferenceLink(bpy.types.Operator):
    bl_idname = 'bim.open_bcf_reference_link'
    bl_label = 'Open BCF Reference Link'
    index: bpy.props.IntProperty()

    def execute(self, context):
        webbrowser.open(bpy.context.scene.BCFProperties.topic_links[self.index].name)
        return {'FINISHED'}


class OpenBcfBimSnippetSchema(bpy.types.Operator):
    bl_idname = 'bim.open_bcf_bim_snippet_schema'
    bl_label = 'Open BCF BIM Snippet Schema'

    def execute(self, context):
        webbrowser.open(bpy.context.scene.BCFProperties.topic_snippet_schema)
        return {'FINISHED'}


class OpenBcfBimSnippetReference(bpy.types.Operator):
    bl_idname = 'bim.open_bcf_bim_snippet_reference'
    bl_label = 'Open BCF BIM Snippet Reference'
    topic_guid: bpy.props.StringProperty()

    def execute(self, context):
        import bcfplugin
        if bpy.context.scene.BCFProperties.topic_snippet_is_external:
            webbrowser.open(bpy.context.scene.BCFProperties.topic_snippet_reference)
            return {'FINISHED'}
        webbrowser.open('file://' + os.path.join(
            bcfplugin.util.getBcfDir(),
            self.topic_guid,
            bpy.context.scene.BCFProperties.topic_snippet_reference
            ))
        return {'FINISHED'}


class OpenBcfDocumentReference(bpy.types.Operator):
    bl_idname = 'bim.open_bcf_document_reference'
    bl_label = 'Open BCF Document Reference'
    data: bpy.props.StringProperty()

    def execute(self, context):
        import bcfplugin
        topic_guid, index = self.data.split('/')
        doc = bpy.context.scene.BCFProperties.topic_document_references[int(index)]
        uri = doc.name
        if doc.is_external:
            webbrowser.open(uri)
            return {'FINISHED'}
        webbrowser.open('file://' + os.path.join(
            bcfplugin.util.getBcfDir(),
            topic_guid, uri))
        return {'FINISHED'}


class SelectAudited(bpy.types.Operator):
    bl_idname = 'bim.select_audited'
    bl_label = 'Select Audited'

    def execute(self, context):
        audited_global_ids = []
        for filename in Path(bpy.context.scene.BIMProperties.features_dir).glob('*.feature'):
            with open(filename, 'r') as feature_file:
                lines = feature_file.readlines()
                for line in lines:
                    words = line.strip().split()
                    for word in words:
                        if self.is_a_global_id(word):
                            audited_global_ids.append(word)
        for object in bpy.context.visible_objects:
            index = object.BIMObjectProperties.attributes.find('GlobalId')
            if index != -1 \
                and object.BIMObjectProperties.attributes[index].string_value in audited_global_ids:
                object.select_set(True)
        return {'FINISHED'}

    def is_a_global_id(self, word):
        return word[0] in ['0', '1', '2', '3'] and len(word) == 22

class QuickProjectSetup(bpy.types.Operator):
    bl_idname = 'bim.quick_project_setup'
    bl_label = 'Quick Project Setup'

    def execute(self, context):
        project = bpy.data.collections.new('IfcProject/My Project')
        site = bpy.data.collections.new('IfcSite/My Site')
        building = bpy.data.collections.new('IfcBuilding/My Building')
        building_storey = bpy.data.collections.new('IfcBuildingStorey/Ground Floor')

        project_obj = bpy.data.objects.new('IfcProject/My Project', None)
        site_obj = bpy.data.objects.new('IfcSite/My Site', None)
        building_obj = bpy.data.objects.new('IfcBuilding/My Building', None)
        building_storey_obj = bpy.data.objects.new('IfcBuildingStorey/Ground Floor', None)

        bpy.context.scene.collection.children.link(project)
        project.children.link(site)
        site.children.link(building)
        building.children.link(building_storey)

        project.objects.link(project_obj)
        site.objects.link(site_obj)
        building.objects.link(building_obj)
        building_storey.objects.link(building_storey_obj)
        return {'FINISHED'}


class AddQto(bpy.types.Operator):
    bl_idname = 'bim.add_qto'
    bl_label = 'Add Qto'

    def execute(self, context):
        name = bpy.context.active_object.BIMObjectProperties.qto_name
        if name not in schema.ifc.qtos:
            return {'FINISHED'}
        qto = bpy.context.active_object.BIMObjectProperties.qtos.add()
        qto.name = name
        for prop_name in schema.ifc.qtos[name]['HasPropertyTemplates'].keys():
            prop = qto.properties.add()
            prop.name = prop_name
        return {'FINISHED'}


class AddPset(bpy.types.Operator):
    bl_idname = 'bim.add_pset'
    bl_label = 'Add Pset'

    def execute(self, context):
        pset_name = bpy.context.active_object.BIMObjectProperties.pset_name
        if pset_name not in schema.ifc.psets:
            return {'FINISHED'}
        pset = bpy.context.active_object.BIMObjectProperties.psets.add()
        pset.name = pset_name
        for prop_name in schema.ifc.psets[pset_name]['HasPropertyTemplates'].keys():
            prop = pset.properties.add()
            prop.name = prop_name
        return {'FINISHED'}


class RemovePset(bpy.types.Operator):
    bl_idname = 'bim.remove_pset'
    bl_label = 'Remove Pset'
    pset_index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.active_object.BIMObjectProperties.psets.remove(self.pset_index)
        return {'FINISHED'}


class RemoveQto(bpy.types.Operator):
    bl_idname = 'bim.remove_qto'
    bl_label = 'Remove Qto'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.active_object.BIMObjectProperties.qtos.remove(self.index)
        return {'FINISHED'}


class AddMaterialPset(bpy.types.Operator):
    bl_idname = 'bim.add_material_pset'
    bl_label = 'Add Material Pset'

    def execute(self, context):
        pset = bpy.context.active_object.active_material.BIMMaterialProperties.psets.add()
        pset.name = bpy.context.active_object.active_material.BIMMaterialProperties.available_material_psets
        return {'FINISHED'}


class RemoveMaterialPset(bpy.types.Operator):
    bl_idname = 'bim.remove_material_pset'
    bl_label = 'Remove Pset'
    pset_index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.active_object.active_material.BIMMaterialProperties.psets.remove(self.pset_index)
        return {'FINISHED'}


class AddConstraint(bpy.types.Operator):
    bl_idname = 'bim.add_constraint'
    bl_label = 'Add Constraint'

    def execute(self, context):
        constraint = bpy.context.scene.BIMProperties.constraints.add()
        constraint.name = 'New Constraint'
        return {'FINISHED'}


class RemoveConstraint(bpy.types.Operator):
    bl_idname = 'bim.remove_constraint'
    bl_label = 'Remove Constraint'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.BIMProperties.constraints.remove(self.index)
        return {'FINISHED'}


class AssignConstraint(bpy.types.Operator):
    bl_idname = 'bim.assign_constraint'
    bl_label = 'Assign Constraint'

    def execute(self, context):
        identification = bpy.context.scene.BIMProperties.constraints[bpy.context.scene.BIMProperties.active_constraint_index].name
        for obj in bpy.context.selected_objects:
            if obj.BIMObjectProperties.constraints.get(identification):
                continue
            constraint = obj.BIMObjectProperties.constraints.add()
            constraint.name = identification
        return {'FINISHED'}


class UnassignConstraint(bpy.types.Operator):
    bl_idname = 'bim.unassign_constraint'
    bl_label = 'Unassign Constraint'

    def execute(self, context):
        identification = bpy.context.scene.BIMProperties.constraints[bpy.context.scene.BIMProperties.active_constraint_index].name
        for obj in bpy.context.selected_objects:
            index = obj.BIMObjectProperties.constraints.find(identification)
            if index >= 0:
                obj.BIMObjectProperties.constraints.remove(index)
        return {'FINISHED'}


class RemoveObjectConstraint(bpy.types.Operator):
    bl_idname = 'bim.remove_object_constraint'
    bl_label = 'Remove Object Constraint'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.active_object.BIMObjectProperties.constraints.remove(self.index)
        return {'FINISHED'}


class AddPerson(bpy.types.Operator):
    bl_idname = 'bim.add_person'
    bl_label = 'Add Person'

    def execute(self, context):
        new = bpy.context.scene.BIMProperties.people.add()
        new.name = 'New Person'
        return {'FINISHED'}


class RemovePerson(bpy.types.Operator):
    bl_idname = 'bim.remove_person'
    bl_label = 'Remove Person'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.BIMProperties.people.remove(self.index)
        return {'FINISHED'}


class AddPersonAddress(bpy.types.Operator):
    bl_idname = 'bim.add_person_address'
    bl_label = 'Add Person Address'

    def execute(self, context):
        new = bpy.context.scene.BIMProperties.people[bpy.context.scene.BIMProperties.active_person_index].addresses.add()
        new.name = 'IfcPostalAddress'
        return {'FINISHED'}


class RemovePersonAddress(bpy.types.Operator):
    bl_idname = 'bim.remove_person_address'
    bl_label = 'Remove Person Address'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.BIMProperties.people[bpy.context.scene.BIMProperties.active_person_index].addresses.remove(self.index)
        return {'FINISHED'}


class AddPersonRole(bpy.types.Operator):
    bl_idname = 'bim.add_person_role'
    bl_label = 'Add Person Role'

    def execute(self, context):
        new = bpy.context.scene.BIMProperties.people[bpy.context.scene.BIMProperties.active_person_index].roles.add()
        return {'FINISHED'}


class RemovePersonRole(bpy.types.Operator):
    bl_idname = 'bim.remove_person_role'
    bl_label = 'Remove Person Role'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.BIMProperties.people[bpy.context.scene.BIMProperties.active_person_index].roles.remove(self.index)
        return {'FINISHED'}


class AddOrganisation(bpy.types.Operator):
    bl_idname = 'bim.add_organisation'
    bl_label = 'Add Organisation'

    def execute(self, context):
        new = bpy.context.scene.BIMProperties.organisations.add()
        new.name = 'New Organisation'
        return {'FINISHED'}


class RemoveOrganisation(bpy.types.Operator):
    bl_idname = 'bim.remove_organisation'
    bl_label = 'Remove Organisation'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.BIMProperties.organisations.remove(self.index)
        return {'FINISHED'}


class AddOrganisationAddress(bpy.types.Operator):
    bl_idname = 'bim.add_organisation_address'
    bl_label = 'Add Organisation Address'

    def execute(self, context):
        new = bpy.context.scene.BIMProperties.organisations[bpy.context.scene.BIMProperties.active_organisation_index].addresses.add()
        new.name = 'IfcPostalAddress'
        return {'FINISHED'}


class RemoveOrganisationAddress(bpy.types.Operator):
    bl_idname = 'bim.remove_organisation_address'
    bl_label = 'Remove Organisation Address'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.BIMProperties.organisations[bpy.context.scene.BIMProperties.active_organisation_index].addresses.remove(self.index)
        return {'FINISHED'}


class AddOrganisationRole(bpy.types.Operator):
    bl_idname = 'bim.add_organisation_role'
    bl_label = 'Add Organisation Role'

    def execute(self, context):
        new = bpy.context.scene.BIMProperties.organisations[bpy.context.scene.BIMProperties.active_organisation_index].roles.add()
        return {'FINISHED'}


class RemoveOrganisationRole(bpy.types.Operator):
    bl_idname = 'bim.remove_organisation_role'
    bl_label = 'Remove Organisation Role'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.BIMProperties.organisations[bpy.context.scene.BIMProperties.active_organisation_index].roles.remove(self.index)
        return {'FINISHED'}


class AddDocumentInformation(bpy.types.Operator):
    bl_idname = 'bim.add_document_information'
    bl_label = 'Add Document Information'

    def execute(self, context):
        info = bpy.context.scene.BIMProperties.document_information.add()
        info.name = 'New Document ID'
        return {'FINISHED'}


class RemoveDocumentInformation(bpy.types.Operator):
    bl_idname = 'bim.remove_document_information'
    bl_label = 'Remove Document Information'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.BIMProperties.document_information.remove(self.index)
        return {'FINISHED'}


class AssignDocumentInformation(bpy.types.Operator):
    bl_idname = 'bim.assign_document_information'
    bl_label = 'Assign Document Information'
    index: bpy.props.IntProperty()

    def execute(self, context):
        reference = bpy.context.scene.BIMProperties.document_references[self.index]
        index = bpy.context.scene.BIMProperties.active_document_information_index
        info = bpy.context.scene.BIMProperties.document_information
        if index < len(info):
            reference.referenced_document = info[index].name
        return {'FINISHED'}


class AddDocumentReference(bpy.types.Operator):
    bl_idname = 'bim.add_document_reference'
    bl_label = 'Add Document Reference'

    def execute(self, context):
        document = bpy.context.scene.BIMProperties.document_references.add()
        document.name = 'New Document Reference ID'
        return {'FINISHED'}


class RemoveDocumentReference(bpy.types.Operator):
    bl_idname = 'bim.remove_document_reference'
    bl_label = 'Remove Document Reference'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.BIMProperties.document_references.remove(self.index)
        return {'FINISHED'}


class RemoveObjectDocumentReference(bpy.types.Operator):
    bl_idname = 'bim.remove_object_document_reference'
    bl_label = 'Remove Object Document Reference'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.active_object.BIMObjectProperties.document_references.remove(self.index)
        return {'FINISHED'}


class AssignDocumentReference(bpy.types.Operator):
    bl_idname = 'bim.assign_document_reference'
    bl_label = 'Assign Document Reference'

    def execute(self, context):
        identification = bpy.context.scene.BIMProperties.document_references[bpy.context.scene.BIMProperties.active_document_reference_index].name
        for obj in bpy.context.selected_objects:
            if obj.BIMObjectProperties.document_references.get(identification):
                continue
            reference = obj.BIMObjectProperties.document_references.add()
            reference.name = identification
        return {'FINISHED'}


class UnassignDocumentReference(bpy.types.Operator):
    bl_idname = 'bim.unassign_document_reference'
    bl_label = 'Unassign Document Reference'

    def execute(self, context):
        identification = bpy.context.scene.BIMProperties.document_references[bpy.context.scene.BIMProperties.active_document_reference_index].name
        for obj in bpy.context.selected_objects:
            index = obj.BIMObjectProperties.document_references.find(identification)
            if index >= 0:
                obj.BIMObjectProperties.document_references.remove(index)
        return {'FINISHED'}


class RemoveObjectDocumentReference(bpy.types.Operator):
    bl_idname = 'bim.remove_object_document_reference'
    bl_label = 'Remove Object Document Reference'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.active_object.BIMObjectProperties.document_references.remove(self.index)
        return {'FINISHED'}

class GenerateGlobalId(bpy.types.Operator):
    bl_idname = 'bim.generate_global_id'
    bl_label = 'Regenerate GlobalId'

    def execute(self, context):
        index = bpy.context.active_object.BIMObjectProperties.attributes.find('GlobalId')
        if index >= 0:
            global_id = bpy.context.active_object.BIMObjectProperties.attributes[index]
        else:
            global_id = bpy.context.active_object.BIMObjectProperties.attributes.add()
        global_id.name = 'GlobalId'
        global_id.data_type = 'string'
        global_id.string_value = ifcopenshell.guid.new()
        return {'FINISHED'}

class AddAttribute(bpy.types.Operator):
    bl_idname = 'bim.add_attribute'
    bl_label = 'Add Attribute'

    def execute(self, context):
        if bpy.context.active_object.BIMObjectProperties.applicable_attributes:
            attribute = bpy.context.active_object.BIMObjectProperties.attributes.add()
            attribute.name = bpy.context.active_object.BIMObjectProperties.applicable_attributes
            if attribute.name == 'GlobalId':
                attribute.string_value = ifcopenshell.guid.new()
        return {'FINISHED'}


class AddMaterialAttribute(bpy.types.Operator):
    bl_idname = 'bim.add_material_attribute'
    bl_label = 'Add Material Attribute'

    def execute(self, context):
        if bpy.context.active_object.active_material.BIMMaterialProperties.applicable_attributes:
            attribute = bpy.context.active_object.active_material.BIMMaterialProperties.attributes.add()
            attribute.name = bpy.context.active_object.active_material.BIMMaterialProperties.applicable_attributes
        return {'FINISHED'}


class RemoveAttribute(bpy.types.Operator):
    bl_idname = 'bim.remove_attribute'
    bl_label = 'Remove Attribute'
    attribute_index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.active_object.BIMObjectProperties.attributes.remove(self.attribute_index)
        return {'FINISHED'}


class RemoveMaterialAttribute(bpy.types.Operator):
    bl_idname = 'bim.remove_material_attribute'
    bl_label = 'Remove Material Attribute'
    attribute_index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.active_object.active_material.BIMMaterialProperties.attributes.remove(self.attribute_index)
        return {'FINISHED'}


class AddSweptSolid(bpy.types.Operator):
    bl_idname = 'bim.add_swept_solid'
    bl_label = 'Add Swept Solid'

    def execute(self, context):
        swept_solids = bpy.context.active_object.data.BIMMeshProperties.swept_solids
        swept_solid = swept_solids.add()
        swept_solid.name = 'Swept Solid {}'.format(len(swept_solids))
        return {'FINISHED'}

class RemoveSweptSolid(bpy.types.Operator):
    bl_idname = 'bim.remove_swept_solid'
    bl_label = 'Remove Swept Solid'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.active_object.data.BIMMeshProperties.swept_solids.remove(self.index)
        return {'FINISHED'}

class AssignSweptSolidOuterCurve(bpy.types.Operator):
    bl_idname = 'bim.assign_swept_solid_outer_curve'
    bl_label = 'Assign Outer Curve'
    index: bpy.props.IntProperty()

    def execute(self, context):
        if bpy.context.mode != 'EDIT_MESH':
            return {'FINISHED'}
        bpy.ops.object.mode_set(mode='OBJECT')
        bpy.ops.object.mode_set(mode='EDIT')
        vertices = [v.index for v in bpy.context.active_object.data.vertices if v.select == True]
        bpy.context.active_object.data.BIMMeshProperties.swept_solids[self.index].outer_curve = json.dumps(vertices)
        return {'FINISHED'}

class SelectSweptSolidOuterCurve(bpy.types.Operator):
    bl_idname = 'bim.select_swept_solid_outer_curve'
    bl_label = 'Select Outer Curve'
    index: bpy.props.IntProperty()

    def execute(self, context):
        if bpy.context.mode != 'EDIT_MESH':
            return {'FINISHED'}
        bpy.ops.object.mode_set(mode='OBJECT')
        outer_curve = bpy.context.active_object.data.BIMMeshProperties.swept_solids[self.index].outer_curve
        if not outer_curve:
            return {'FINISHED'}
        indices = json.loads(outer_curve)
        for index in indices:
            bpy.context.active_object.data.vertices[index].select = True
        bpy.ops.object.mode_set(mode='EDIT')
        return {'FINISHED'}

class AddSweptSolidInnerCurve(bpy.types.Operator):
    bl_idname = 'bim.add_swept_solid_inner_curve'
    bl_label = 'Add Inner Curve'
    index: bpy.props.IntProperty()

    def execute(self, context):
        if bpy.context.mode != 'EDIT_MESH':
            return {'FINISHED'}
        bpy.ops.object.mode_set(mode='OBJECT')
        bpy.ops.object.mode_set(mode='EDIT')
        vertices = [v.index for v in bpy.context.active_object.data.vertices if v.select == True]
        swept_solid = bpy.context.active_object.data.BIMMeshProperties.swept_solids[self.index]
        if swept_solid.inner_curves:
            curves = json.loads(swept_solid.inner_curves)
        else:
            curves = []
        curves.append(vertices)
        swept_solid.inner_curves = json.dumps(curves)
        return {'FINISHED'}

class SelectSweptSolidInnerCurves(bpy.types.Operator):
    bl_idname = 'bim.select_swept_solid_inner_curves'
    bl_label = 'Select Inner Curves'
    index: bpy.props.IntProperty()

    def execute(self, context):
        if bpy.context.mode != 'EDIT_MESH':
            return {'FINISHED'}
        bpy.ops.object.mode_set(mode='OBJECT')
        inner_curves = bpy.context.active_object.data.BIMMeshProperties.swept_solids[self.index].inner_curves
        if not inner_curves:
            return {'FINISHED'}
        curves = json.loads(inner_curves)
        for curve in curves:
            for index in curve:
                bpy.context.active_object.data.vertices[index].select = True
        bpy.ops.object.mode_set(mode='EDIT')
        return {'FINISHED'}

class AssignSweptSolidExtrusion(bpy.types.Operator):
    bl_idname = 'bim.assign_swept_solid_extrusion'
    bl_label = 'Assign Extrusion'
    index: bpy.props.IntProperty()

    def execute(self, context):
        if bpy.context.mode != 'EDIT_MESH':
            return {'FINISHED'}
        bpy.ops.object.mode_set(mode='OBJECT')
        bpy.ops.object.mode_set(mode='EDIT')
        vertices = [v.index for v in bpy.context.active_object.data.vertices if v.select == True]
        bpy.context.active_object.data.BIMMeshProperties.swept_solids[self.index].extrusion = json.dumps(vertices)
        return {'FINISHED'}

class SelectSweptSolidExtrusion(bpy.types.Operator):
    bl_idname = 'bim.select_swept_solid_extrusion'
    bl_label = 'Select Extrusion'
    index: bpy.props.IntProperty()

    def execute(self, context):
        if bpy.context.mode != 'EDIT_MESH':
            return {'FINISHED'}
        bpy.ops.object.mode_set(mode='OBJECT')
        extrusion = bpy.context.active_object.data.BIMMeshProperties.swept_solids[self.index].extrusion
        if not extrusion:
            return {'FINISHED'}
        indices = json.loads(extrusion)
        for index in indices:
            bpy.context.active_object.data.vertices[index].select = True
        bpy.ops.object.mode_set(mode='EDIT')
        return {'FINISHED'}

class SelectExternalMaterialDir(bpy.types.Operator):
    bl_idname = "bim.select_external_material_dir"
    bl_label = "Select Material File"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")

    def execute(self, context):
        bpy.context.active_object.active_material.BIMMaterialProperties.location = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class SelectCobieIfcFile(bpy.types.Operator):
    bl_idname = "bim.select_cobie_ifc_file"
    bl_label = "Select COBie IFC File"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")

    def execute(self, context):
        bpy.context.scene.BIMProperties.cobie_ifc_file = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class SelectCobieJsonFile(bpy.types.Operator):
    bl_idname = "bim.select_cobie_json_file"
    bl_label = "Select COBie JSON File"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")

    def execute(self, context):
        bpy.context.scene.BIMProperties.cobie_json_file = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class ExecuteIfcCobie(bpy.types.Operator):
    bl_idname = 'bim.execute_ifc_cobie'
    bl_label = 'Execute IFCCOBie'
    file_format: bpy.props.StringProperty()

    def execute(self, context):
        from cobie import IfcCobieParser
        output_dir = os.path.dirname(bpy.context.scene.BIMProperties.cobie_ifc_file)
        output = os.path.join(output_dir, 'output')
        logger = logging.getLogger('IFCtoCOBie')
        fh = logging.FileHandler(os.path.join(output_dir, 'cobie.log'))
        fh.setLevel(logging.DEBUG)
        fh.setFormatter(logging.Formatter('%(asctime)s : %(levelname)s : %(message)s'))
        logger = logging.getLogger('IFCtoCOBie')
        logger.addHandler(fh)
        selector = ifcopenshell.util.selector.Selector()
        if bpy.context.scene.BIMProperties.cobie_json_file:
            with open(bpy.context.scene.BIMProperties.cobie_json_file, 'r') as f:
                custom_data = json.load(f)
        else:
            custom_data = {}
        parser = IfcCobieParser(logger, selector)
        parser.parse(
            bpy.context.scene.BIMProperties.cobie_ifc_file,
            bpy.context.scene.BIMProperties.cobie_types,
            bpy.context.scene.BIMProperties.cobie_components,
            custom_data)
        if self.file_format == 'xlsx':
            from cobie import CobieXlsWriter
            writer = CobieXlsWriter(parser, output)
            writer.write()
            webbrowser.open('file://' + output + '.' + self.file_format)
        elif self.file_format == 'ods':
            from cobie import CobieOdsWriter
            writer = CobieOdsWriter(parser, output)
            writer.write()
            webbrowser.open('file://' + output + '.' + self.file_format)
        else:
            from cobie import CobieCsvWriter
            writer = CobieCsvWriter(parser, output_dir)
            writer.write()
            webbrowser.open('file://' + output_dir)
        webbrowser.open('file://' + output_dir + '/cobie.log')
        return {'FINISHED'}


class ExecuteIfcPatch(bpy.types.Operator):
    bl_idname = 'bim.execute_ifc_patch'
    bl_label = 'Execute IFCPatch'
    file_format: bpy.props.StringProperty()

    def execute(self, context):
        import ifcpatch
        ifcpatch.execute({
            'input': bpy.context.scene.BIMProperties.ifc_patch_input,
            'output': bpy.context.scene.BIMProperties.ifc_patch_output,
            'recipe': bpy.context.scene.BIMProperties.ifc_patch_recipes,
            'arguments': json.loads('[' + bpy.context.scene.BIMProperties.ifc_patch_args + ']'),
            'log': bpy.context.scene.BIMProperties.data_dir + 'process.log'
        })
        return {'FINISHED'}


class SelectDiffJsonFile(bpy.types.Operator):
    bl_idname = "bim.select_diff_json_file"
    bl_label = "Select Diff JSON File"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")

    def execute(self, context):
        bpy.context.scene.BIMProperties.diff_json_file = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class VisualiseDiff(bpy.types.Operator):
    bl_idname = 'bim.visualise_diff'
    bl_label = 'Visualise Diff'

    def execute(self, context):
        with open(bpy.context.scene.BIMProperties.diff_json_file, 'r') as file:
            diff = json.load(file)
        for obj in bpy.context.visible_objects:
            obj.color = (1., 1., 1., .2)
            global_id = obj.BIMObjectProperties.attributes.get('GlobalId')
            if not global_id:
                continue
            if global_id.string_value in diff['deleted']:
                obj.color = (1., 0., 0., .2)
            elif global_id.string_value in diff['added']:
                obj.color = (0., 1., 0., .2)
            elif global_id.string_value in diff['changed']:
                obj.color = (0., 0., 1., .2)
        area = next(area for area in bpy.context.screen.areas if area.type == 'VIEW_3D')
        area.spaces[0].shading.color_type = 'OBJECT'
        return {'FINISHED'}


class SelectDiffOldFile(bpy.types.Operator):
    bl_idname = "bim.select_diff_old_file"
    bl_label = "Select Diff Old File"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")

    def execute(self, context):
        bpy.context.scene.BIMProperties.diff_old_file = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class SelectDiffNewFile(bpy.types.Operator):
    bl_idname = "bim.select_diff_new_file"
    bl_label = "Select Diff New File"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")

    def execute(self, context):
        bpy.context.scene.BIMProperties.diff_new_file = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class ExecuteIfcDiff(bpy.types.Operator):
    bl_idname = 'bim.execute_ifc_diff'
    bl_label = 'Execute IFC Diff'
    filename_ext = '.json'
    filepath: bpy.props.StringProperty(subtype='FILE_PATH')

    def invoke(self, context, event):
        self.filepath = bpy.path.ensure_ext(bpy.data.filepath, '.json')
        WindowManager = context.window_manager
        WindowManager.fileselect_add(self)
        return {'RUNNING_MODAL'}

    def execute(self, context):
        import ifcdiff
        ifc_diff = ifcdiff.IfcDiff(
            bpy.context.scene.BIMProperties.diff_old_file,
            bpy.context.scene.BIMProperties.diff_new_file,
            self.filepath,
            bpy.context.scene.BIMProperties.diff_relationships.split()
        )
        ifc_diff.diff()
        ifc_diff.export()
        bpy.context.scene.BIMProperties.diff_json_file = self.filepath
        return {'FINISHED'}


class ExportClashSets(bpy.types.Operator):
    bl_idname = 'bim.export_clash_sets'
    bl_label = 'Export Clash Sets'
    filename_ext = '.json'
    filepath: bpy.props.StringProperty(subtype='FILE_PATH')

    def invoke(self, context, event):
        self.filepath = bpy.path.ensure_ext(bpy.data.filepath, '.json')
        WindowManager = context.window_manager
        WindowManager.fileselect_add(self)
        return {'RUNNING_MODAL'}

    def execute(self, context):
        self.filepath = bpy.path.ensure_ext(self.filepath, '.json')
        clash_sets = []
        for clash_set in bpy.context.scene.BIMProperties.clash_sets:
            self.a = []
            self.b = []
            for ab in ['a', 'b']:
                for data in getattr(clash_set, ab):
                    clash_source = { 'file': data.name }
                    if data.selector:
                        clash_source['selector'] = data.selector
                        clash_source['mode'] = data.mode
                    getattr(self, ab).append(clash_source)
            clash_sets.append({
                'name': clash_set.name,
                'tolerance': clash_set.tolerance,
                'a': self.a,
                'b': self.b
                })
        with open(self.filepath, 'w') as destination:
            destination.write(json.dumps(clash_sets, indent=4))
        return {'FINISHED'}


class ImportClashSets(bpy.types.Operator):
    bl_idname = 'bim.import_clash_sets'
    bl_label = 'Import Clash Sets'
    filename_ext = '.json'
    filepath: bpy.props.StringProperty(subtype='FILE_PATH')

    def invoke(self, context, event):
        self.filepath = bpy.path.ensure_ext(bpy.data.filepath, '.json')
        WindowManager = context.window_manager
        WindowManager.fileselect_add(self)
        return {'RUNNING_MODAL'}

    def execute(self, context):
        with open(self.filepath) as f:
            clash_sets = json.load(f)
        for clash_set in clash_sets:
            new = bpy.context.scene.BIMProperties.clash_sets.add()
            new.name = clash_set['name']
            new.tolerance = clash_set['tolerance']
            for clash_source in clash_set['a']:
                new_source = new.a.add()
                new_source.name = clash_source['file']
                if 'selector' in clash_source:
                    new_source.selector = clash_source['selector']
                    new_source.mode = clash_source['mode']
            if clash_set['b']:
                for clash_source in clash_set['b']:
                    new_source = new.b.add()
                    new_source.name = clash_source['file']
                    if 'selector' in clash_source:
                        new_source.selector = clash_source['selector']
                        new_source.mode = clash_source['mode']
        return {'FINISHED'}


class AddClashSet(bpy.types.Operator):
    bl_idname = 'bim.add_clash_set'
    bl_label = 'Add Clash Set'

    def execute(self, context):
        new = bpy.context.scene.BIMProperties.clash_sets.add()
        new.name = 'New Clash Set'
        new.tolerance = 0.01
        return {'FINISHED'}


class RemoveClashSet(bpy.types.Operator):
    bl_idname = 'bim.remove_clash_set'
    bl_label = 'Remove Clash Set'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.BIMProperties.clash_sets.remove(self.index)
        return {'FINISHED'}


class AddClashSource(bpy.types.Operator):
    bl_idname = 'bim.add_clash_source'
    bl_label = 'Add Clash Source'
    group: bpy.props.StringProperty()

    def execute(self, context):
        clash_set = bpy.context.scene.BIMProperties.clash_sets[bpy.context.scene.BIMProperties.active_clash_set_index]
        source = getattr(clash_set, self.group).add()
        return {'FINISHED'}


class RemoveClashSource(bpy.types.Operator):
    bl_idname = 'bim.remove_clash_source'
    bl_label = 'Remove Clash Source'
    index: bpy.props.IntProperty()
    group: bpy.props.StringProperty()

    def execute(self, context):
        clash_set = bpy.context.scene.BIMProperties.clash_sets[bpy.context.scene.BIMProperties.active_clash_set_index]
        getattr(clash_set, self.group).remove(self.index)
        return {'FINISHED'}


class SelectClashSource(bpy.types.Operator):
    bl_idname = "bim.select_clash_source"
    bl_label = "Select Clash Source"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")
    index: bpy.props.IntProperty()
    group: bpy.props.StringProperty()

    def execute(self, context):
        clash_set = bpy.context.scene.BIMProperties.clash_sets[bpy.context.scene.BIMProperties.active_clash_set_index]
        getattr(clash_set, self.group)[self.index].name = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class ExecuteIfcClash(bpy.types.Operator):
    bl_idname = 'bim.execute_ifc_clash'
    bl_label = 'Execute IFC Clash'
    filename_ext = '.json'
    filepath: bpy.props.StringProperty(subtype='FILE_PATH')

    def invoke(self, context, event):
        self.filepath = bpy.path.ensure_ext(bpy.data.filepath, '.json')
        WindowManager = context.window_manager
        WindowManager.fileselect_add(self)
        return {'RUNNING_MODAL'}

    def execute(self, context):
        import ifcclash
        settings = ifcclash.IfcClashSettings()
        self.filepath = bpy.path.ensure_ext(self.filepath, '.json')
        settings.output = self.filepath
        settings.logger = logging.getLogger('Clash')
        settings.logger.setLevel(logging.DEBUG)
        ifc_clasher = ifcclash.IfcClasher(settings)
        ifc_clasher.clash_sets = []
        for clash_set in bpy.context.scene.BIMProperties.clash_sets:
            self.a = []
            self.b = []
            for ab in ['a', 'b']:
                for data in getattr(clash_set, ab):
                    clash_source = { 'file': data.name }
                    if data.selector:
                        clash_source['selector'] = data.selector
                        clash_source['mode'] = data.mode
                    getattr(self, ab).append(clash_source)
            ifc_clasher.clash_sets.append({
                'name': clash_set.name,
                'tolerance': clash_set.tolerance,
                'a': self.a,
                'b': self.b
                })
        ifc_clasher.clash()
        ifc_clasher.export()
        return {'FINISHED'}


class SelectIfcClashResults(bpy.types.Operator):
    bl_idname = 'bim.select_ifc_clash_results'
    bl_label = 'Select IFC Clash Results'
    filename_ext = '.json'
    filepath: bpy.props.StringProperty(subtype='FILE_PATH')

    def invoke(self, context, event):
        self.filepath = bpy.path.ensure_ext(bpy.data.filepath, '.json')
        WindowManager = context.window_manager
        WindowManager.fileselect_add(self)
        return {'RUNNING_MODAL'}

    def execute(self, context):
        self.filepath = bpy.path.ensure_ext(self.filepath, '.json')
        with open(self.filepath) as f:
            clash_sets = json.load(f)
        clash_set_name = bpy.context.scene.BIMProperties.clash_sets[
            bpy.context.scene.BIMProperties.active_clash_set_index].name
        global_ids = []
        for clash_set in clash_sets:
            if clash_set['name'] != clash_set_name:
                continue
            for clash in clash_set['clashes'].values():
                global_ids.extend([clash['a_global_id'], clash['b_global_id']])
        for obj in bpy.context.visible_objects:
            global_id = obj.BIMObjectProperties.attributes.get('GlobalId')
            if global_id and global_id.string_value in global_ids:
                obj.select_set(True)
        return {'FINISHED'}


class SelectBcfFile(bpy.types.Operator):
    bl_idname = "bim.select_bcf_file"
    bl_label = "Select BCF File"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")

    def execute(self, context):
        bpy.context.scene.BCFProperties.bcf_file = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class SelectFeaturesDir(bpy.types.Operator):
    bl_idname = "bim.select_features_dir"
    bl_label = "Select Features Directory"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")

    def execute(self, context):
        bpy.context.scene.BIMProperties.features_dir = os.path.dirname(os.path.abspath(self.filepath)) if '.' in self.filepath else self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class SelectIfcFile(bpy.types.Operator):
    bl_idname = "bim.select_ifc_file"
    bl_label = "Select IFC File"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")

    def execute(self, context):
        bpy.context.scene.BIMProperties.ifc_file = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class ValidateIfcFile(bpy.types.Operator):
    bl_idname = 'bim.validate_ifc_file'
    bl_label = 'Validate IFC File'

    def execute(self, context):
        import ifcopenshell.validate
        logger = logging.getLogger('validate')
        logger.setLevel(logging.DEBUG)
        ifcopenshell.validate.validate(ifc.IfcStore.get_file(), logger)
        return {'FINISHED'}


class SelectDataDir(bpy.types.Operator):
    bl_idname = "bim.select_data_dir"
    bl_label = "Select Data Directory"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")

    def execute(self, context):
        bpy.context.scene.BIMProperties.data_dir = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class SelectSchemaDir(bpy.types.Operator):
    bl_idname = "bim.select_schema_dir"
    bl_label = "Select Schema Directory"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")

    def execute(self, context):
        bpy.context.scene.BIMProperties.schema_dir = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}

class CreateAggregate(bpy.types.Operator):
    bl_idname = 'bim.create_aggregate'
    bl_label = 'Create Aggregate'

    def execute(self, context):
        spatial_container = None
        for obj in bpy.context.selected_objects:
            if obj.instance_collection:
                return {'FINISHED'}
            for collection in obj.users_collection:
                if 'IfcRelAggregates' in collection.name:
                    return {'FINISHED'}
                elif collection.name[0:3] == 'Ifc':
                    spatial_container = collection
        if not spatial_container:
            return {'FINISHED'}

        aggregate = bpy.data.collections.new('IfcRelAggregates/{}'.format(
            bpy.context.scene.BIMProperties.aggregate_class))
        for project in [c for c in bpy.context.view_layer.layer_collection.children if 'IfcProject' in c.name]:
            if not [c for c in project.children if 'Aggregates' in c.name]:
                aggregates = bpy.data.collections.new('Aggregates')
                project.collection.children.link(aggregates)
            for aggregate_collection in [c for c in project.children if 'Aggregates' in c.name]:
                aggregate_collection.collection.children.link(aggregate)
                aggregate_collection.children[aggregate.name].hide_viewport = True
                break
            break
        for obj in bpy.context.selected_objects:
            for collection in obj.users_collection:
                collection.objects.unlink(obj)
            aggregate.objects.link(obj)

        instance = bpy.data.objects.new('{}/{}'.format(
            bpy.context.scene.BIMProperties.aggregate_class,
            bpy.context.scene.BIMProperties.aggregate_name),
            None)
        instance.instance_type = 'COLLECTION'
        instance.instance_collection = aggregate
        spatial_container.objects.link(instance)
        return {'FINISHED'}

class EditAggregate(bpy.types.Operator):
    bl_idname = 'bim.edit_aggregate'
    bl_label = 'Edit Aggregate'

    def execute(self, context):
        obj = bpy.context.active_object
        if obj.instance_type != 'COLLECTION' \
                or 'IfcRelAggregates' not in obj.instance_collection.name:
            return {'FINISHED'}
        bpy.context.view_layer.objects[obj.name].hide_viewport = True
        for project in [c for c in bpy.context.view_layer.layer_collection.children if 'IfcProject' in c.name]:
            for aggregate_collection in [c for c in project.children if 'Aggregates' in c.name]:
                for aggregate in [c for c in aggregate_collection.children if c.name == obj.instance_collection.name]:
                    aggregate.hide_viewport = False
                    break
        return {'FINISHED'}

class SaveAggregate(bpy.types.Operator):
    bl_idname = 'bim.save_aggregate'
    bl_label = 'Save Aggregate'

    def execute(self, context):
        obj = bpy.context.active_object
        aggregate = None
        names = [c.name for c in obj.users_collection]
        for project in [c for c in bpy.context.view_layer.layer_collection.children if 'IfcProject' in c.name]:
            for aggregate_collection in [c for c in project.children if 'Aggregates' in c.name]:
                for collection in [c for c in aggregate_collection.children if c.name in names]:
                    collection.hide_viewport = True
                    aggregate = collection.collection
                    break
        if not aggregate:
            return {'FINISHED'}
        for obj in bpy.context.view_layer.objects:
            if obj.instance_collection == aggregate:
                obj.hide_viewport = False
        return {'FINISHED'}


class ExplodeAggregate(bpy.types.Operator):
    bl_idname = 'bim.explode_aggregate'
    bl_label = 'Explode Aggregate'

    def execute(self, context):
        obj = bpy.context.active_object
        if obj.instance_type != 'COLLECTION' \
                or 'IfcRelAggregates' not in obj.instance_collection.name:
            return {'FINISHED'}
        aggregate_collection = bpy.data.collections.get(obj.instance_collection.name)
        spatial_collection = obj.users_collection[0]
        for part in aggregate_collection.objects:
            spatial_collection.objects.link(part)
            aggregate_collection.objects.unlink(part)
        bpy.data.objects.remove(obj, do_unlink=True)
        bpy.data.collections.remove(aggregate_collection, do_unlink=True)
        return {'FINISHED'}


class LoadClassification(bpy.types.Operator):
    bl_idname = 'bim.load_classification'
    bl_label = 'Load Classification'

    def execute(self, context):
        from . import prop
        prop.ClassificationView.raw_data = schema.ifc.load_classification(
            context.scene.BIMProperties.classification)
        context.scene.BIMProperties.classification_references.root = ''
        return {'FINISHED'}


class AddClassification(bpy.types.Operator):
    bl_idname = 'bim.add_classification'
    bl_label = 'Add Classification'

    def execute(self, context):
        if context.scene.BIMProperties.classification not in schema.ifc.classifications:
            return {'FINISHED'}
        data = schema.ifc.classifications[context.scene.BIMProperties.classification]
        classification = context.scene.BIMProperties.classifications.add()
        data_map = {
            'name': 'Name', 'source': 'Source',
            'edition': 'Edition', 'edition_date': 'EditionDate',
            'description': 'Description', 'location': 'Location',
            'reference_tokens': 'ReferenceTokens'
        }
        for key, value in data_map.items():
            if hasattr(data, value) and getattr(data, value):
                setattr(classification, key, str(getattr(data, value)))
        classification.filename = context.scene.BIMProperties.classification
        return {'FINISHED'}


class RemoveClassification(bpy.types.Operator):
    bl_idname = 'bim.remove_classification'
    bl_label = 'Remove Classification'
    classification_index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.BIMProperties.classifications.remove(self.classification_index)
        return {'FINISHED'}


class AssignClassification(bpy.types.Operator):
    bl_idname = 'bim.assign_classification'
    bl_label = 'Assign Classification'

    def execute(self, context):
        for obj in bpy.context.selected_objects:
            classification = obj.BIMObjectProperties.classifications.add()
            refs = bpy.context.scene.BIMProperties.classification_references
            data = refs.root['children'][refs.children[refs.active_index].name]
            if data['identification']:
                classification.name = data['identification']
            if data['name']:
                classification.human_name = data['name']
            for key in ['location', 'description']:
                if data[key]:
                    setattr(classification, key, data[key])
            classification.referenced_source = bpy.context.scene.BIMProperties.classification
        return {'FINISHED'}


class UnassignClassification(bpy.types.Operator):
    bl_idname = 'bim.unassign_classification'
    bl_label = 'Unassign Classification'

    def execute(self, context):
        refs = bpy.context.scene.BIMProperties.classification_references
        key = refs.children[refs.active_index].name
        for obj in bpy.context.selected_objects:
            index = obj.BIMObjectProperties.classifications.find(key)
            if index != -1:
                obj.BIMObjectProperties.classifications.remove(index)

            obj.BIMObjectProperties.classification = ''
        return {'FINISHED'}


class RemoveClassificationReference(bpy.types.Operator):
    bl_idname = 'bim.remove_classification_reference'
    bl_label = 'Remove Classification Reference'
    classification_index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.active_object.BIMObjectProperties.classifications.remove(self.classification_index)
        return {'FINISHED'}


class FetchExternalMaterial(bpy.types.Operator):
    bl_idname = 'bim.fetch_external_material'
    bl_label = 'Fetch External Material'

    def execute(self, context):
        location = bpy.context.active_object.active_material.BIMMaterialProperties.location
        if location[-6:] != '.mpass':
            return {'FINISHED'}
        if not os.path.isabs(location):
            location = os.path.join(os.path.join(
                bpy.context.scene.BIMProperties.data_dir, location))
        with open(location) as f:
            self.material_pass = json.load(f)
        if bpy.context.scene.render.engine == 'BLENDER_EEVEE' \
                and 'eevee' in self.material_pass:
            self.fetch_eevee_or_cycles('eevee')
        elif bpy.context.scene.render.engine == 'CYCLES' \
                and 'cycles' in self.material_pass:
            self.fetch_eevee_or_cycles('cycles')
        return {'FINISHED'}

    def fetch_eevee_or_cycles(self, name):
        identification = bpy.context.active_object.active_material.BIMMaterialProperties.identification
        uri = self.material_pass[name]['uri']
        if not os.path.isabs(uri):
            uri = os.path.join(os.path.join(
                bpy.context.scene.BIMProperties.data_dir, uri))
        bpy.ops.wm.link(
            filename=identification,
            directory=os.path.join(uri, 'Material')
        )
        for material in bpy.data.materials:
            if material.name == identification \
                    and material.library:
                bpy.context.active_object.material_slots[0].material = material
                return


class FetchLibraryInformation(bpy.types.Operator):
    bl_idname = 'bim.fetch_library_information'
    bl_label = 'Fetch Library Information'

    def execute(self, context):
        # TODO
        return {'FINISHED'}


class FetchObjectPassport(bpy.types.Operator):
    bl_idname = 'bim.fetch_object_passport'
    bl_label = 'Fetch Object Passport'

    def execute(self, context):
        for reference in bpy.context.active_object.BIMObjectProperties.document_references:
            reference = bpy.context.scene.BIMProperties.document_references[reference.name]
            if reference.location[-6:] == '.blend':
                self.fetch_blender(reference)
        return {'FINISHED'}

    def fetch_blender(self, reference):
        bpy.ops.wm.link(
            filename=reference.name,
            directory=os.path.join(reference.location, 'Mesh')
        )
        bpy.context.active_object.data = bpy.data.meshes[reference.name]


class AddSubcontext(bpy.types.Operator):
    bl_idname = 'bim.add_subcontext'
    bl_label = 'Add Subcontext'
    context: bpy.props.StringProperty()

    def execute(self, context):
        props = bpy.context.scene.BIMProperties
        subcontext = getattr(bpy.context.scene.BIMProperties, '{}_subcontexts'.format(self.context)).add()
        subcontext.name = bpy.context.scene.BIMProperties.available_subcontexts
        subcontext.target_view = bpy.context.scene.BIMProperties.available_target_views
        return {'FINISHED'}


class RemoveSubcontext(bpy.types.Operator):
    bl_idname = 'bim.remove_subcontext'
    bl_label = 'Remove Context'
    indexes: bpy.props.StringProperty()

    def execute(self, context):
        context, subcontext_index = self.indexes.split('-')
        subcontext_index = int(subcontext_index)
        getattr(bpy.context.scene.BIMProperties, '{}_subcontexts'.format(context)).remove(subcontext_index)
        return {'FINISHED'}


class OpenView(bpy.types.Operator):
    bl_idname = 'bim.open_view'
    bl_label = 'Open View'
    view: bpy.props.StringProperty()

    def execute(self, context):
        webbrowser.open('file://' + os.path.join(
            bpy.context.scene.BIMProperties.data_dir, 'diagrams',
            self.view + '.svg'))
        return {'FINISHED'}


class CutSection(bpy.types.Operator):
    bl_idname = 'bim.cut_section'
    bl_label = 'Cut Section'

    def execute(self, context):
        camera = bpy.context.scene.camera
        if not (camera.type == 'CAMERA' and camera.data.type == 'ORTHO'):
            return {'FINISHED'}
        self.diagram_name = camera.name.split('/')[1]
        bpy.context.scene.render.filepath = os.path.join(
            bpy.context.scene.BIMProperties.data_dir,
            'diagrams',
            '{}.png'.format(self.diagram_name)
        )
        if bpy.context.scene.DocProperties.should_render == 'DEFAULT':
            bpy.ops.render.render(write_still=True)
        elif bpy.context.scene.DocProperties.should_render == 'VIEWPORT':
            for obj in camera.users_collection[0].objects:
                obj.hide_set(True)
            bpy.ops.render.opengl(write_still=True)
            for obj in camera.users_collection[0].objects:
                obj.hide_set(False)
        location = camera.location
        render = bpy.context.scene.render
        if self.is_landscape():
            width = camera.data.ortho_scale
            height = width / render.resolution_x * render.resolution_y
        else:
            height = camera.data.ortho_scale
            width = height / render.resolution_y * render.resolution_x
        depth = camera.data.clip_end
        projection = camera.matrix_world.to_quaternion() @ Vector((0, 0, -1))
        x_axis = camera.matrix_world.to_quaternion() @ Vector((1, 0, 0))
        y_axis = camera.matrix_world.to_quaternion() @ Vector((0, -1, 0))
        top_left_corner = location - (width / 2 * x_axis) - (height / 2 * y_axis)
        ifc_cutter = cut_ifc.IfcCutter()
        import ifccsv
        ifc_cutter.ifc_filenames = [i.name for i in bpy.context.scene.DocProperties.ifc_files]
        ifc_cutter.data_dir = bpy.context.scene.BIMProperties.data_dir
        drawing_style = bpy.context.scene.DocProperties.drawing_styles[camera.data.BIMCameraProperties.active_drawing_style_index]
        ifc_cutter.vector_style = drawing_style.vector_style
        ifc_cutter.diagram_name = self.diagram_name
        ifc_cutter.background_image = bpy.context.scene.render.filepath
        if camera.data.BIMCameraProperties.cut_objects == 'CUSTOM':
            ifc_cutter.cut_objects = camera.data.BIMCameraProperties.cut_objects_custom
        else:
            ifc_cutter.cut_objects = camera.data.BIMCameraProperties.cut_objects
        ifc_cutter.leader_obj = None
        ifc_cutter.stair_obj = None
        ifc_cutter.dimension_obj = None
        ifc_cutter.break_obj = None
        ifc_cutter.equal_obj = None
        ifc_cutter.hidden_objs = []
        ifc_cutter.solid_objs = []
        ifc_cutter.plan_level_obj = None
        ifc_cutter.section_level_obj = None
        ifc_cutter.grid_objs = []
        ifc_cutter.text_objs = []
        ifc_cutter.misc_objs = []
        ifc_cutter.attributes = [a.name for a in drawing_style.attributes]
        for obj in camera.users_collection[0].objects:
            if 'IfcGrid' in obj.name:
                ifc_cutter.grid_objs.append(obj)
            elif 'IfcGroup' in obj.name and obj.type == 'CAMERA':
                ifc_cutter.camera_obj = obj

            if 'IfcAnnotation/' not in obj.name:
                continue

            if 'Leader' in obj.name:
                ifc_cutter.leader_obj = (obj, obj.data)
            elif 'Stair' in obj.name:
                ifc_cutter.stair_obj = obj
            elif 'Equal' in obj.name:
                ifc_cutter.equal_obj = obj
            elif 'Dimension' in obj.name:
                ifc_cutter.dimension_obj = obj
            elif 'Break' in obj.name:
                ifc_cutter.break_obj = obj
            elif 'Hidden' in obj.name:
                ifc_cutter.hidden_objs.append((obj, obj.data))
            elif 'Solid' in obj.name:
                ifc_cutter.solid_objs.append((obj, obj.data))
            elif 'Plan Level' in obj.name:
                ifc_cutter.plan_level_obj = obj
            elif 'Section Level' in obj.name:
                ifc_cutter.section_level_obj = obj
            elif obj.type == 'FONT':
                ifc_cutter.text_objs.append(obj)
            else:
                ifc_cutter.misc_objs.append(obj)

        ifc_cutter.section_box = {
            'projection': tuple(projection),
            'x_axis': tuple(x_axis),
            'y_axis': tuple(y_axis),
            'top_left_corner': tuple(top_left_corner),
            'x': width,
            'y': height,
            'z': depth,
            'shape': None,
            'face': None
        }
        ifc_cutter.cut_pickle_file = os.path.join(ifc_cutter.data_dir, '{}-cut.pickle'.format(self.diagram_name))
        ifc_cutter.text_pickle_file = os.path.join(ifc_cutter.data_dir, '{}-text.pickle'.format(self.diagram_name))
        ifc_cutter.metadata_pickle_file = os.path.join(ifc_cutter.data_dir, '{}-metadata.pickle'.format(self.diagram_name))
        ifc_cutter.should_recut = bpy.context.scene.DocProperties.should_recut
        ifc_cutter.should_recut_selected = bpy.context.scene.DocProperties.should_recut_selected
        selected_global_ids = []
        for obj in bpy.context.selected_objects:
            if 'Ifc' not in obj.name:
                continue
            for attribute in obj.BIMObjectProperties.attributes:
                if attribute.name == 'GlobalId':
                    selected_global_ids.append(attribute.string_value)
                    break
        ifc_cutter.selected_global_ids = selected_global_ids
        ifc_cutter.should_extract = bpy.context.scene.DocProperties.should_extract
        svg_writer = svgwriter.SvgWriter(ifc_cutter)
        if camera.data.BIMCameraProperties.diagram_scale == 'CUSTOM':
            human_scale, fraction = camera.data.BIMCameraProperties.custom_diagram_scale.split('|')
        else:
            human_scale, fraction = camera.data.BIMCameraProperties.diagram_scale.split('|')
        numerator, denominator = fraction.split('/')
        if camera.data.BIMCameraProperties.is_nts:
            svg_writer.human_scale = 'NTS'
        else:
            svg_writer.human_scale = human_scale
        svg_writer.scale = float(numerator) / float(denominator)
        ifc_cutter.cut()
        svg_writer.write()
        bpy.ops.bim.open_view(view=self.diagram_name)
        return {'FINISHED'}

    def is_landscape(self):
        return bpy.context.scene.render.resolution_x > bpy.context.scene.render.resolution_y


class AddSheet(bpy.types.Operator):
    bl_idname = 'bim.add_sheet'
    bl_label = 'Add Sheet'

    def execute(self, context):
        new = bpy.context.scene.DocProperties.sheets.add()
        new.name = '{} - SHEET'.format(len(bpy.context.scene.DocProperties.sheets))
        sheet_builder = sheeter.SheetBuilder()
        sheet_builder.data_dir = bpy.context.scene.BIMProperties.data_dir
        sheet_builder.create(new.name, bpy.context.scene.DocProperties.titleblock)
        return {'FINISHED'}


class OpenSheet(bpy.types.Operator):
    bl_idname = 'bim.open_sheet'
    bl_label = 'Open Sheet'

    def execute(self, context):
        props = bpy.context.scene.DocProperties
        webbrowser.open('file://' + os.path.join(
            bpy.context.scene.BIMProperties.data_dir, 'sheets',
            props.sheets[props.active_sheet_index].name + '.svg'))
        return {'FINISHED'}


class AddDrawingToSheet(bpy.types.Operator):
    bl_idname = 'bim.add_drawing_to_sheet'
    bl_label = 'Add Drawing To Sheet'

    def execute(self, context):
        props = bpy.context.scene.DocProperties
        sheet_builder = sheeter.SheetBuilder()
        sheet_builder.data_dir = bpy.context.scene.BIMProperties.data_dir
        try:
            sheet_builder.add_drawing(
                props.drawings[props.active_drawing_index].name,
                props.sheets[props.active_sheet_index].name)
        except:
            self.report({'ERROR'}, 'Drawings need to be created before being added to a sheet')
        return {'FINISHED'}


class CreateSheets(bpy.types.Operator):
    bl_idname = 'bim.create_sheets'
    bl_label = 'Create Sheets'

    def execute(self, context):
        props = bpy.context.scene.DocProperties
        name = props.sheets[props.active_sheet_index].name
        sheet_builder = sheeter.SheetBuilder()
        sheet_builder.data_dir = bpy.context.scene.BIMProperties.data_dir
        sheet_builder.build(name)

        svg2pdf_command = bpy.context.preferences.addons['blenderbim'].preferences.svg2pdf_command
        if svg2pdf_command:
            import subprocess
            path = os.path.join(bpy.context.scene.BIMProperties.data_dir, 'build', name)
            svg = os.path.join(path, name + '.svg')
            pdf = os.path.join(path, name + '.pdf')
            # With great power comes great responsibility. Example:
            # [['inkscape', svg, '-o', pdf]]
            commands = eval(svg2pdf_command)
            for command in commands:
                subprocess.run(command)

        svg2dxf_command = bpy.context.preferences.addons['blenderbim'].preferences.svg2dxf_command
        if svg2dxf_command:
            import subprocess
            path = os.path.join(bpy.context.scene.BIMProperties.data_dir, 'build', name)
            svg = os.path.join(path, name + '.svg')
            eps = os.path.join(path, name + '.eps')
            dxf = os.path.join(path, name + '.dxf')
            base = os.path.join(path, name)
            # With great power comes great responsibility. Example:
            # [['inkscape', svg, '-o', eps], ['pstoedit', '-dt', '-f', 'dxf:-polyaslines -mm', eps, dxf, '-psarg', '-dNOSAFER']]
            commands = eval(svg2dxf_command)
            for command in commands:
                subprocess.run(command)


        if svg2pdf_command:
            webbrowser.open('file://' + os.path.join(pdf))
        else:
            webbrowser.open('file://' + os.path.join(bpy.context.scene.BIMProperties.data_dir, 'build', name, name + '.svg'))
        return {'FINISHED'}


class ActivateView(bpy.types.Operator):
    bl_idname = 'bim.activate_view'
    bl_label = 'Activate View'
    drawing_index: bpy.props.IntProperty()

    def execute(self, context):
        camera = bpy.context.scene.DocProperties.drawings[self.drawing_index].camera
        if not camera:
            return {'FINISHED'}
        bpy.context.scene.camera = camera
        area = next(area for area in bpy.context.screen.areas if area.type == 'VIEW_3D')
        area.spaces[0].region_3d.view_perspective = 'CAMERA'
        views_collection = bpy.data.collections.get('Views')
        for collection in views_collection.children:
            bpy.context.view_layer.layer_collection.children['Views'].children[collection.name].hide_viewport = True
            bpy.data.collections.get(collection.name).hide_render = True
        bpy.context.view_layer.layer_collection.children['Views'].children[camera.users_collection[0].name].hide_viewport = False
        bpy.data.collections.get(camera.users_collection[0].name).hide_render = False
        bpy.ops.bim.activate_drawing_style()
        return {'FINISHED'}


class AssignContext(bpy.types.Operator):
    bl_idname = 'bim.assign_context'
    bl_label = 'Assign Context'

    def execute(self, context):
        if not self.is_mesh_context_sensitive(bpy.context.active_object.data.name):
            bpy.context.active_object.data.name = '{}/{}/{}/{}'.format(
                bpy.context.scene.BIMProperties.available_contexts,
                bpy.context.scene.BIMProperties.available_subcontexts,
                bpy.context.scene.BIMProperties.available_target_views,
                bpy.context.active_object.data.name
            )
        else:
            bpy.context.active_object.data.name = '{}/{}/{}/{}'.format(
                bpy.context.scene.BIMProperties.available_contexts,
                bpy.context.scene.BIMProperties.available_subcontexts,
                bpy.context.scene.BIMProperties.available_target_views,
                bpy.context.active_object.data.name.split('/')[3]
            )
        return {'FINISHED'}

    def is_mesh_context_sensitive(self, name):
        return '/' in name \
            and ( \
                name[0:6] == 'Model/' \
                or name[0:5] == 'Plan/' \
            )


class SwitchContext(bpy.types.Operator):
    bl_idname = 'bim.switch_context'
    bl_label = 'Switch Context'
    has_target_context: bpy.props.BoolProperty()
    context_name: bpy.props.StringProperty()
    subcontext_name: bpy.props.StringProperty()
    target_view_name: bpy.props.StringProperty()

    # Warning: This is an incredibly experimental operator. It effectively does
    # a mini-import. A better approach will make this obsolete in the future.
    def execute(self, context):
        self.obj = bpy.context.active_object

        if '/' not in self.obj.data.name:
            self.obj.data.name = ifcopenshell.guid.compress(str(uuid.uuid4()).replace('-', ''))
            self.obj.data.name = 'Model/Body/MODEL_VIEW/' + self.obj.data.name
            representation_context = self.obj.BIMObjectProperties.representation_contexts.add()
            representation_context.context = 'Model'
            representation_context.name = 'Body'
            representation_context.target_view = 'MODEL_VIEW'

        self.context = bpy.context.scene.BIMProperties.available_contexts
        self.subcontext = bpy.context.scene.BIMProperties.available_subcontexts
        self.target_view = bpy.context.scene.BIMProperties.available_target_views

        if self.has_target_context:
            self.context = self.context_name
            self.subcontext = self.subcontext_name
            self.target_view = self.target_view_name

        existing_mesh = self.obj.data
        existing_mesh.use_fake_user = True
        mesh = bpy.data.meshes.get('{}/{}/{}/{}'.format(
            self.context, self.subcontext, self.target_view, self.obj.data.name.split('/')[3]))
        if not mesh:
            try:
                global_id = self.obj.BIMObjectProperties.attributes.get('GlobalId').string_value
                mesh = self.pull_mesh_from_ifc(global_id)
            except:
                mesh = self.obj.data.copy()
                mesh.name = '{}/{}/{}/{}'.format(
                    self.context, self.subcontext, self.target_view, self.obj.data.name.split('/')[3])
                has_context = False
                for context in self.obj.BIMObjectProperties.representation_contexts:
                    if context.context == self.context \
                            and context.name == self.subcontext \
                            and context.target_view == self.target_view:
                        has_context = True
                        break
                if not has_context:
                    representation_context = self.obj.BIMObjectProperties.representation_contexts.add()
                    representation_context.context = self.context
                    representation_context.name = self.subcontext
                    representation_context.target_view = self.target_view
            mesh.use_fake_user = True
        self.obj.data = mesh
        return {'FINISHED'}

    def pull_mesh_from_ifc(self, global_id):
        self.file = ifc.IfcStore.get_file()
        logger = logging.getLogger('ImportIFC')
        ifc_import_settings = import_ifc.IfcImportSettings.factory(bpy.context, ifc.IfcStore.path, logger)
        element = self.file.by_id(global_id)
        settings = ifcopenshell.geom.settings()
        settings.set(settings.INCLUDE_CURVES, True)
        if element.is_a('IfcProduct'):
            representations = element.Representation.Representations
        else:
            representations = element.RepresentationMaps

        for rep in element.Representation.Representations:
            if rep.ContextOfItems.is_a('IfcGeometricRepresentationSubContext') \
                    and rep.ContextOfItems.ContextType == self.context \
                    and rep.ContextOfItems.ContextIdentifier == self.subcontext \
                    and rep.ContextOfItems.TargetView == self.target_view:
                break
            elif rep.ContextOfItems.is_a('IfcGeometricRepresentationContext') \
                    and rep.ContextOfItems.ContextType == self.context \
                    and rep.ContextOfItems.ContextIdentifier == self.subcontext:
                break

        if not element.is_a('IfcProduct'):
            rep = rep.MappedRepresentation

        shape = ifcopenshell.geom.create_shape(settings, rep)
        ifc_importer = import_ifc.IfcImporter(ifc_import_settings)
        ifc_importer.file = self.file
        mesh = ifc_importer.create_mesh(element, shape)
        mesh.name = '{}/{}/{}/{}'.format(
            self.context, self.subcontext, self.target_view, self.obj.data.name.split('/')[3])
        self.obj.data = mesh
        material_creator = import_ifc.MaterialCreator(ifc_import_settings)
        material_creator.create(element, self.obj, mesh)
        return mesh


class RemoveContext(bpy.types.Operator):
    bl_idname = 'bim.remove_context'
    bl_label = 'Remove Context'
    index: bpy.props.IntProperty()

    def execute(self, context):
        obj = bpy.context.active_object
        data = obj.BIMObjectProperties.representation_contexts[self.index]

        if '/' not in obj.data.name:
            obj.data.name = 'Model/Body/MODEL_VIEW/' + obj.data.name

        mesh = bpy.data.meshes.get('{}/{}/{}/{}'.format(
            data.context, data.name, data.target_view, obj.data.name.split('/')[3]))

        if mesh:
            if obj.data == mesh:
                void_name = 'Void/Void/Void/' + obj.data.name.split('/')[3]
                void_mesh = bpy.data.meshes.get(void_name)
                if not void_mesh:
                    void_mesh = bpy.data.meshes.new(void_name)
                obj.data = void_mesh
            bpy.data.meshes.remove(mesh)

        obj.BIMObjectProperties.representation_contexts.remove(self.index)
        return {'FINISHED'}


class OpenUpstream(bpy.types.Operator):
    bl_idname = 'bim.open_upstream'
    bl_label = 'Open Upstream Reference'
    page: bpy.props.StringProperty()

    def execute(self, context):
        if self.page == 'home':
            webbrowser.open('https://blenderbim.org/')
        elif self.page == 'docs':
            webbrowser.open('https://blenderbim.org/docs/')
        elif self.page == 'wiki':
            webbrowser.open('https://wiki.osarch.org/')
        elif self.page == 'community':
            webbrowser.open('https://community.osarch.org/')
        return {'FINISHED'}


class BIM_OT_CopyAttributesToSelection(bpy.types.Operator):
    """Copies attributes from the active object towards selected objects"""
    bl_idname = "bim.copy_attributes_to_selection"
    bl_label = "Copy Attributes To Selection"

    prop_base = bpy.props.StringProperty() # data for properties to assign to
    prop_name = bpy.props.StringProperty(description="Property name which to change")
    sub_props = bpy.props.StringProperty() # properties which to copy (commasep). (empty = all)
    collection_element = bpy.props.BoolProperty(
        description="If this is a collection element, copy the complete thing")

    @classmethod
    def poll(cls, context):
        return context.active_object is not None

    def execute(self, context):
        active_object = bpy.context.active_object
        selected_objects = [obj for obj in bpy.context.visible_objects
            if obj.type == active_object.type and obj in bpy.context.selected_objects and obj!=active_object]
        if self.prop_base:
            prop_base = eval('active_object.'+ self.prop_base)
        else:
            prop_base = active_object
        if not self.collection_element:
            self.copy_simple(prop_base, selected_objects)
            return {'FINISHED'}
        self.copy_collection(prop_base, selected_objects)
        return {'FINISHED'}

    def copy_simple(self, prop_base, selected_objects):
        prop = getattr(prop_base, self.prop_name)
        for obj in selected_objects:
            if self.prop_base:
                new_prop_base = eval('obj.' + self.prop_base)
            else:
                new_prop_base = obj
            setattr(new_prop_base, self.prop_name, prop)

    def copy_collection(self, prop_base, selected_objects):
        prop = prop_base[self.prop_name]
        for obj in selected_objects:
            if self.prop_base:
                new_prop_base = eval('obj.' + self.prop_base)
            else:
                new_prop_base = obj

            if self.prop_name in new_prop_base:
                new_prop_base = new_prop_base[self.prop_name]
            else:
                new_prop_base = new_prop_base.add()

            if self.sub_props:
                for p in self.sub_props.replace(' ','').split(','):
                    try:
                        setattr(new_prop_base, p, getattr(prop, p))
                    except: pass
            else:
                for p in dir(prop):
                    try:
                        setattr(new_prop_base, p, getattr(prop, p))
                    except: pass


class CopyPropertyToSelection(bpy.types.Operator):
    bl_idname = 'bim.copy_property_to_selection'
    bl_label = 'Copy Property To Selection'
    pset_name: bpy.props.StringProperty()
    prop_name: bpy.props.StringProperty()
    prop_value: bpy.props.StringProperty()

    def execute(self, context):
        self.applicable_psets_cache = {}
        self.empty = ifcopenshell.file()
        for obj in bpy.context.selected_objects:
            if '/' not in obj.name:
                continue
            pset = obj.BIMObjectProperties.psets.get(self.pset_name)
            if not pset:
                applicable_psets = self.get_applicable_psets(obj.name.split('/')[0])
                if self.pset_name not in applicable_psets:
                    continue
                pset = obj.BIMObjectProperties.psets.add()
                pset.name = self.pset_name
                for template_prop_name in schema.ifc.psets[self.pset_name]['HasPropertyTemplates'].keys():
                    prop = pset.properties.add()
                    prop.name = template_prop_name
            prop = pset.properties.get(self.prop_name)
            if prop:
                prop.string_value = self.prop_value
        return {'FINISHED'}

    # TODO: move into util module. See bug #971
    def get_applicable_psets(self, element_class):
        if element_class not in self.applicable_psets_cache:
            element = self.empty.create_entity(element_class)
            applicable_psets = []
            for ifc_class, pset_names in schema.ifc.applicable_psets.items():
                if element.is_a(ifc_class):
                    applicable_psets.extend(pset_names)
            self.applicable_psets_cache[element_class] = applicable_psets
        return self.applicable_psets_cache[element_class]


class BIM_OT_ChangeClassificationLevel(bpy.types.Operator):
    bl_idname = "bim.change_classification_level"
    bl_label = "Change Classification Level"

    # string representing the id-data (e.g. the scene).
    path_sid: bpy.props.StringProperty()
    # path from the id-data to the classification view object
    path_lst: bpy.props.StringProperty()
    # name of child entity to enter (empty = go up one level)
    path_itm: bpy.props.StringProperty()

    def invoke(self, context, event):
        id_data = eval(self.path_sid)
        lst = id_data.path_resolve(self.path_lst)
        if self.path_itm:
            lst.root = self.path_itm
        else:
            lst.root = ''
        return {'FINISHED'}


class AddPropertySetTemplate(bpy.types.Operator):
    bl_idname = 'bim.add_property_set_template'
    bl_label = 'Add Property Set Template'

    def execute(self, context):
        context.scene.BIMProperties.active_property_set_template.global_id = ''
        context.scene.BIMProperties.active_property_set_template.name = 'New_Pset'
        context.scene.BIMProperties.active_property_set_template.description = ''
        context.scene.BIMProperties.active_property_set_template.template_type = 'PSET_TYPEDRIVENONLY'
        context.scene.BIMProperties.active_property_set_template.applicable_entity = 'IfcTypeObject'
        while len(bpy.context.scene.BIMProperties.property_templates) > 0:
            bpy.context.scene.BIMProperties.property_templates.remove(0)
        return {'FINISHED'}


class RemovePropertySetTemplate(bpy.types.Operator):
    bl_idname = 'bim.remove_property_set_template'
    bl_label = 'Remove Property Set Template'

    def execute(self, context):
        template = ifc.IfcStore.pset_template_file.by_guid(context.scene.BIMProperties.property_set_templates)
        ifc.IfcStore.pset_template_file.remove(template)
        ifc.IfcStore.pset_template_file.write(ifc.IfcStore.pset_template_path)
        from . import prop
        prop.refreshPropertySetTemplates(self, context)
        return {'FINISHED'}

class EditPropertySetTemplate(bpy.types.Operator):
    bl_idname = 'bim.edit_property_set_template'
    bl_label = 'Edit Property Set Template'

    def execute(self, context):
        template = ifc.IfcStore.pset_template_file.by_guid(context.scene.BIMProperties.property_set_templates)
        context.scene.BIMProperties.active_property_set_template.global_id = template.GlobalId
        context.scene.BIMProperties.active_property_set_template.name = template.Name
        context.scene.BIMProperties.active_property_set_template.description = template.Description
        context.scene.BIMProperties.active_property_set_template.template_type = template.TemplateType
        context.scene.BIMProperties.active_property_set_template.applicable_entity = template.ApplicableEntity

        while len(bpy.context.scene.BIMProperties.property_templates) > 0:
            bpy.context.scene.BIMProperties.property_templates.remove(0)

        if template.HasPropertyTemplates:
            for property_template in template.HasPropertyTemplates:
                if not property_template.is_a('IfcSimplePropertyTemplate'):
                    continue
                new = context.scene.BIMProperties.property_templates.add()
                new.global_id = property_template.GlobalId
                new.name = property_template.Name
                new.description = property_template.Description
                new.primary_measure_type = property_template.PrimaryMeasureType
        return {'FINISHED'}

class SavePropertySetTemplate(bpy.types.Operator):
    bl_idname = 'bim.save_property_set_template'
    bl_label = 'Save Property Set Template'

    def execute(self, context):
        blender_property_set_template = context.scene.BIMProperties.active_property_set_template
        if blender_property_set_template.global_id:
            template = ifc.IfcStore.pset_template_file.by_guid(blender_property_set_template.global_id)
        else:
            template = ifc.IfcStore.pset_template_file.createIfcPropertySetTemplate()
            template.GlobalId = ifcopenshell.guid.new()
        template.Name = blender_property_set_template.name
        template.Description = blender_property_set_template.description
        template.TemplateType = blender_property_set_template.template_type
        template.ApplicableEntity = blender_property_set_template.applicable_entity

        saved_global_ids = []

        for blender_property_template in context.scene.BIMProperties.property_templates:
            if blender_property_template.global_id:
                property_template = ifc.IfcStore.pset_template_file.by_guid(blender_property_template.global_id)
            else:
                property_template = ifc.IfcStore.pset_template_file.createIfcSimplePropertyTemplate()
                property_template.GlobalId = ifcopenshell.guid.new()
                if template.HasPropertyTemplates:
                    has_property_templates = list(template.HasPropertyTemplates)
                else:
                    has_property_templates = []
                has_property_templates.append(property_template)
                template.HasPropertyTemplates = has_property_templates
            property_template.Name = blender_property_template.name
            property_template.Description = blender_property_template.description
            property_template.PrimaryMeasureType = blender_property_template.primary_measure_type
            property_template.TemplateType = 'P_SINGLEVALUE'
            property_template.AccessState = 'READWRITE'
            saved_global_ids.append(property_template.GlobalId)

        for element in template.HasPropertyTemplates:
            if element.GlobalId not in saved_global_ids:
                ifc.IfcStore.pset_template_file.remove(element)

        ifc.IfcStore.pset_template_file.write(ifc.IfcStore.pset_template_path)
        from . import prop
        prop.refreshPropertySetTemplates(self, context)
        return {'FINISHED'}


class AddPropertyTemplate(bpy.types.Operator):
    bl_idname = 'bim.add_property_template'
    bl_label = 'Add Property Template'

    def execute(self, context):
        context.scene.BIMProperties.property_templates.add()
        return {'FINISHED'}


class RemovePropertyTemplate(bpy.types.Operator):
    bl_idname = 'bim.remove_property_template'
    bl_label = 'Remove Property Template'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.BIMProperties.property_templates.remove(self.index)
        return {'FINISHED'}


class AddSectionPlane(bpy.types.Operator):
    bl_idname = 'bim.add_section_plane'
    bl_label = 'Add Temporary Section Cutaway'

    def execute(self, context):
        obj = self.create_section_obj()
        if not self.has_section_override_node():
            self.create_section_compare_node()
            self.create_section_override_node(obj)
        else:
            self.append_obj_to_section_override_node(obj)
        self.add_default_material_if_none_exists()
        self.override_materials()
        return {'FINISHED'}

    def create_section_obj(self):
        section = bpy.data.objects.new('Section', None)
        section.empty_display_type = 'SINGLE_ARROW'
        section.empty_display_size = 5
        section.show_in_front = True
        if bpy.context.active_object.select_get() \
                and isinstance(bpy.context.active_object.data, bpy.types.Camera):
            section.matrix_world = bpy.context.active_object.matrix_world @ Euler((radians(180.0), 0.0, 0.0), 'XYZ').to_matrix().to_4x4()
        else:
            section.rotation_euler = Euler((radians(180.0), 0.0, 0.0), 'XYZ')
            section.location = bpy.context.scene.cursor.location
        collection = bpy.data.collections.get('Sections')
        if not collection:
            collection = bpy.data.collections.new('Sections')
            bpy.context.scene.collection.children.link(collection)
        collection.objects.link(section)
        return section

    def has_section_override_node(self):
        return bpy.data.node_groups.get('Section Override')

    def create_section_compare_node(self):
        group = bpy.data.node_groups.new('Section Compare', type='ShaderNodeTree')
        group_input = group.nodes.new(type='NodeGroupInput')
        group_output = group.nodes.new(type='NodeGroupOutput')
        separate_xyz_a = group.nodes.new(type='ShaderNodeSeparateXYZ')
        separate_xyz_b = group.nodes.new(type='ShaderNodeSeparateXYZ')
        gt_a = group.nodes.new(type='ShaderNodeMath')
        gt_a.operation = 'GREATER_THAN'
        gt_a.inputs[1].default_value = 0
        gt_b = group.nodes.new(type='ShaderNodeMath')
        gt_b.operation = 'GREATER_THAN'
        gt_b.inputs[1].default_value = 0
        add = group.nodes.new(type='ShaderNodeMath')
        compare = group.nodes.new(type='ShaderNodeMath')
        compare.operation = 'COMPARE'
        compare.inputs[1].default_value = 2
        group.links.new(group_input.outputs[''], separate_xyz_a.inputs[0])
        group.links.new(group_input.outputs[''], separate_xyz_b.inputs[0])
        group.links.new(separate_xyz_a.outputs[2], gt_a.inputs[0])
        group.links.new(separate_xyz_b.outputs[2], gt_b.inputs[0])
        group.links.new(gt_a.outputs[0], add.inputs[0])
        group.links.new(gt_b.outputs[0], add.inputs[1])
        group.links.new(add.outputs[0], compare.inputs[0])
        group.links.new(compare.outputs[0], group_output.inputs[''])

    def create_section_override_node(self, obj):
        group = bpy.data.node_groups.new('Section Override', type='ShaderNodeTree')

        group_input = group.nodes.new(type='NodeGroupInput')
        group_output = group.nodes.new(type='NodeGroupOutput')

        backfacing = group.nodes.new(type='ShaderNodeNewGeometry')
        backfacing_mix = group.nodes.new(type='ShaderNodeMixShader')
        emission = group.nodes.new(type='ShaderNodeEmission')
        emission.inputs[0].default_value = list(bpy.context.scene.BIMProperties.section_plane_colour) + [1]

        group.links.new(backfacing.outputs['Backfacing'], backfacing_mix.inputs[0])
        group.links.new(group_input.outputs[''], backfacing_mix.inputs[1])
        group.links.new(emission.outputs['Emission'], backfacing_mix.inputs[2])

        transparent = group.nodes.new(type='ShaderNodeBsdfTransparent')
        section_mix = group.nodes.new(type='ShaderNodeMixShader')
        section_mix.name = 'Section Mix'

        group.links.new(transparent.outputs['BSDF'], section_mix.inputs[1])
        group.links.new(backfacing_mix.outputs['Shader'], section_mix.inputs[2])

        group.links.new(section_mix.outputs['Shader'], group_output.inputs[''])

        cut_obj = group.nodes.new(type='ShaderNodeTexCoord')
        cut_obj.object = obj
        section_compare = group.nodes.new(type='ShaderNodeGroup')
        section_compare.node_tree = bpy.data.node_groups.get('Section Compare')
        section_compare.name = 'Last Section Compare'
        value = group.nodes.new(type='ShaderNodeValue')
        value.name = 'Mock Section'
        group.links.new(cut_obj.outputs['Object'], section_compare.inputs[0])
        group.links.new(value.outputs[0], section_compare.inputs[1])
        group.links.new(section_compare.outputs[0], section_mix.inputs[0])

    def append_obj_to_section_override_node(self, obj):
        group = bpy.data.node_groups.get('Section Override')
        cut_obj = group.nodes.new(type='ShaderNodeTexCoord')
        cut_obj.object = obj
        section_compare = group.nodes.new(type='ShaderNodeGroup')
        section_compare.node_tree = bpy.data.node_groups.get('Section Compare')

        last_compare = group.nodes.get('Last Section Compare')
        last_compare.name = 'Section Compare'
        mock_section = group.nodes.get('Mock Section')
        section_mix = group.nodes.get('Section Mix')

        group.links.new(last_compare.outputs[0], section_compare.inputs[0])
        group.links.new(mock_section.outputs[0], section_compare.inputs[1])
        group.links.new(cut_obj.outputs['Object'], last_compare.inputs[1])
        group.links.new(section_compare.outputs[0], section_mix.inputs[0])

        section_compare.name = 'Last Section Compare'

    def add_default_material_if_none_exists(self):
        material = bpy.data.materials.get('Section Override')
        if not material:
            material = bpy.data.materials.new('Section Override')
            material.use_nodes = True

        if bpy.context.scene.BIMProperties.should_section_selected_objects:
            objects = list(bpy.context.selected_objects)
        else:
            objects = list(bpy.context.visible_objects)

        for obj in objects:
            aggregate = obj.instance_collection
            if aggregate and 'IfcRelAggregates/' in aggregate.name:
                for part in aggregate.objects:
                    objects.append(part)
            if not (obj.data \
                    and hasattr(obj.data, 'materials') \
                    and obj.data.materials \
                    and obj.data.materials[0]):
                if obj.data and hasattr(obj.data, 'materials'):
                    if len(obj.material_slots):
                        obj.material_slots[0].material = material
                    else:
                        obj.data.materials.append(material)

    def override_materials(self):
        override = bpy.data.node_groups.get('Section Override')
        for material in bpy.data.materials:
            material.use_nodes = True
            if material.node_tree.nodes.get('Section Override'):
                continue
            material.blend_method = 'HASHED'
            material.shadow_method = 'HASHED'
            material_output = self.get_node(material.node_tree.nodes, 'OUTPUT_MATERIAL')
            if not material_output:
                continue
            from_socket = material_output.inputs[0].links[0].from_socket
            section_override = material.node_tree.nodes.new(type='ShaderNodeGroup')
            section_override.name = 'Section Override'
            section_override.node_tree = override
            material.node_tree.links.new(from_socket, section_override.inputs[0])
            material.node_tree.links.new(section_override.outputs[0], material_output.inputs[0])

    def get_node(self, nodes, node_type):
        for node in nodes:
            if node.type == node_type:
                return node


class RemoveSectionPlane(bpy.types.Operator):
    bl_idname = 'bim.remove_section_plane'
    bl_label = 'Remove Temporary Section Cutaway'

    def execute(self, context):
        name = bpy.context.active_object.name
        section_override = bpy.data.node_groups.get('Section Override')
        if not section_override:
            return {'FINISHED'}
        for node in section_override.nodes:
            if node.type != 'TEX_COORD' or node.object.name != name:
                continue
            section_compare = node.outputs['Object'].links[0].to_node
            # If the tex coord links to section_compare.inputs[1], it is called 'Input_3'
            if node.outputs['Object'].links[0].to_socket.identifier == 'Input_3':
                section_override.links.new(
                    section_compare.inputs[0].links[0].from_socket,
                    section_compare.outputs[0].links[0].to_socket)
            else: # If it links to section_compare.inputs[0]
                if section_compare.inputs[1].links[0].from_node.name == 'Mock Section':
                    # Then it is the very last section. Purge everything.
                    self.purge_all_section_data()
                    return {'FINISHED'}
                section_override.links.new(
                    section_compare.inputs[1].links[0].from_socket,
                    section_compare.outputs[0].links[0].to_socket)
            section_override.nodes.remove(section_compare)
            section_override.nodes.remove(node)

            old_last_compare = section_override.nodes.get('Last Section Compare')
            old_last_compare.name = 'Section Compare'
            section_mix = section_override.nodes.get('Section Mix')
            new_last_compare = section_mix.inputs[0].links[0].from_node
            new_last_compare.name = 'Last Section Compare'
        bpy.ops.object.delete({"selected_objects": [bpy.context.active_object]})
        return {'FINISHED'}

    def purge_all_section_data(self):
        bpy.data.materials.remove(bpy.data.materials.get('Section Override'))
        for material in bpy.data.materials:
            if not material.node_tree:
                continue
            override = material.node_tree.nodes.get('Section Override')
            if not override:
                continue
            material.node_tree.links.new(
                override.inputs[0].links[0].from_socket,
                override.outputs[0].links[0].to_socket)
            material.node_tree.nodes.remove(override)
        bpy.data.node_groups.remove(bpy.data.node_groups.get('Section Override'))
        bpy.data.node_groups.remove(bpy.data.node_groups.get('Section Compare'))
        bpy.ops.object.delete({"selected_objects": [bpy.context.active_object]})


class AddCsvAttribute(bpy.types.Operator):
    bl_idname = 'bim.add_csv_attribute'
    bl_label = 'Add CSV Attribute'

    def execute(self, context):
        attribute = bpy.context.scene.BIMProperties.csv_attributes.add()
        return {'FINISHED'}


class RemoveCsvAttribute(bpy.types.Operator):
    bl_idname = 'bim.remove_csv_attribute'
    bl_label = 'Remove CSV Attribute'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.BIMProperties.csv_attributes.remove(self.index)
        return {'FINISHED'}


class ExportIfcCsv(bpy.types.Operator):
    bl_idname = 'bim.export_ifccsv'
    bl_label = 'Export IFC to CSV'
    filename_ext = '.csv'
    filepath: bpy.props.StringProperty(subtype='FILE_PATH')

    def invoke(self, context, event):
        self.filepath = bpy.path.ensure_ext(bpy.data.filepath, '.csv')
        WindowManager = context.window_manager
        WindowManager.fileselect_add(self)
        return {'RUNNING_MODAL'}

    def execute(self, context):
        import ifccsv
        self.filepath = bpy.path.ensure_ext(self.filepath, '.csv')
        ifc_file = ifcopenshell.open(bpy.context.scene.BIMProperties.ifc_file)
        selector = ifcopenshell.util.selector.Selector()
        results = selector.parse(ifc_file, bpy.context.scene.BIMProperties.ifc_selector)
        ifc_csv = ifccsv.IfcCsv()
        ifc_csv.output = self.filepath
        ifc_csv.attributes = [a.name for a in bpy.context.scene.BIMProperties.csv_attributes]
        ifc_csv.selector = selector
        ifc_csv.export(ifc_file, results)
        return {'FINISHED'}


class ImportIfcCsv(bpy.types.Operator):
    bl_idname = 'bim.import_ifccsv'
    bl_label = 'Import CSV to IFC'
    filename_ext = '.csv'
    filepath: bpy.props.StringProperty(subtype='FILE_PATH')

    def invoke(self, context, event):
        self.filepath = bpy.path.ensure_ext(bpy.data.filepath, '.csv')
        WindowManager = context.window_manager
        WindowManager.fileselect_add(self)
        return {'RUNNING_MODAL'}

    def execute(self, context):
        import ifccsv
        ifc_csv = ifccsv.IfcCsv()
        ifc_csv.output = self.filepath
        ifc_csv.Import(bpy.context.scene.BIMProperties.ifc_file)
        return {'FINISHED'}


class EyedropIfcCsv(bpy.types.Operator):
    bl_idname = 'bim.eyedrop_ifccsv'
    bl_label = 'Query Selected Items'

    def execute(self, context):
        global_ids = []
        for obj in bpy.context.selected_objects:
            if hasattr(obj, 'BIMObjectProperties') \
                    and obj.BIMObjectProperties.attributes.get('GlobalId'):
                global_ids.append('#' + obj.BIMObjectProperties.attributes.get('GlobalId').string_value)
        bpy.context.scene.BIMProperties.ifc_selector = '|'.join(global_ids)
        return {'FINISHED'}


class ReloadIfcFile(bpy.types.Operator):
    bl_idname = 'bim.reload_ifc_file'
    bl_label = 'Reload IFC File'

    def execute(self, context):
        self.diff_ifc()
        self.reimport_ifc(context)
        return {'FINISHED'}

    def diff_ifc(self):
        import ifcdiff
        temp_file = tempfile.NamedTemporaryFile(delete = False)
        temp_file.close()
        ifc_diff = ifcdiff.IfcDiff(
            bpy.context.scene.BIMProperties.ifc_cache,
            bpy.context.scene.BIMProperties.ifc_file,
            temp_file.name
        )
        ifc_diff.diff()
        ifc_diff.export()
        bpy.context.scene.BIMProperties.diff_json_file = temp_file.name

    def reimport_ifc(self, context):
        logger = logging.getLogger('ImportIFC')
        logging.basicConfig(
            filename=bpy.context.scene.BIMProperties.data_dir + 'process.log',
            filemode='a', level=logging.DEBUG)
        ifc_import_settings = import_ifc.IfcImportSettings.factory(
            context, bpy.context.scene.BIMProperties.ifc_file, logger)
        ifc_importer = import_ifc.IfcImporter(ifc_import_settings)
        ifc_importer.execute()


class SelectSimilarType(bpy.types.Operator):
    bl_idname = 'bim.select_similar_type'
    bl_label = 'Select Similar Type'

    def execute(self, context):
        if context.active_object.BIMObjectProperties.relating_type:
            relating_type = context.active_object.BIMObjectProperties.relating_type
        elif 'Type/' in context.active_object.name:
            relating_type = context.active_object
        else:
            return {'FINISHED'}
        for obj in bpy.context.visible_objects:
            if obj.BIMObjectProperties.relating_type == relating_type:
                obj.select_set(True)
        return {'FINISHED'}


class AddIfcFile(bpy.types.Operator):
    bl_idname = 'bim.add_ifc_file'
    bl_label = 'Add IFC File'

    def execute(self, context):
        bpy.context.scene.DocProperties.ifc_files.add()
        return {'FINISHED'}


class RemoveIfcFile(bpy.types.Operator):
    bl_idname = 'bim.remove_ifc_file'
    bl_label = 'Remove IFC File'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.DocProperties.ifc_files.remove(self.index)
        return {'FINISHED'}


class SelectDocIfcFile(bpy.types.Operator):
    bl_idname = "bim.select_doc_ifc_file"
    bl_label = "Select Documentation IFC File"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.DocProperties.ifc_files[self.index].name = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class AddAnnotation(bpy.types.Operator):
    bl_idname = 'bim.add_annotation'
    bl_label = 'Add Annotation'
    obj_name = bpy.props.StringProperty()
    data_type = bpy.props.StringProperty()

    def execute(self, context):
        if not bpy.context.scene.camera:
            return {'FINISHED'}
        if self.data_type == 'text':
            if bpy.context.selected_objects:
                for selected_object in bpy.context.selected_objects:
                    obj = annotation.Annotator.add_text(related_element=selected_object)
            else:
                obj = annotation.Annotator.add_text()
        else:
            obj = annotation.Annotator.get_annotation_obj(self.obj_name, self.data_type)
            obj = annotation.Annotator.add_line_to_annotation(obj)
        bpy.ops.object.select_all(action='DESELECT')
        bpy.context.view_layer.objects.active = obj
        bpy.ops.object.mode_set(mode='EDIT')
        return {'FINISHED'}


class GenerateReferences(bpy.types.Operator):
    bl_idname = 'bim.generate_references'
    bl_label = 'Generate References'

    def execute(self, context):
        self.camera = bpy.context.scene.camera
        self.filter_potential_references()
        if self.camera.data.BIMCameraProperties.target_view == 'PLAN_VIEW':
            self.generate_grids()
        if self.camera.data.BIMCameraProperties.target_view == 'ELEVATION_VIEW':
            self.generate_grids()
            self.generate_levels()
        if self.camera.data.BIMCameraProperties.target_view == 'SECTION_VIEW':
            self.generate_grids()
            self.generate_levels()
        return {'FINISHED'}

    def filter_potential_references(self):
        for name in ['grids', 'levels']:
            setattr(self, name, [])
        for obj in bpy.data.objects:
            if 'IfcGridAxis/' in obj.name:
                self.grids.append(obj)
            if 'IfcBuildingStorey/' in obj.name:
                self.levels.append(obj)

    def generate_grids(self):
        # TODO
        pass

    def generate_levels(self):
        if self.camera.data.BIMCameraProperties.raster_x > self.camera.data.BIMCameraProperties.raster_y:
            width = self.camera.data.ortho_scale
            height = width / self.camera.data.BIMCameraProperties.raster_x * self.camera.data.BIMCameraProperties.raster_y
        else:
            height = self.camera.data.ortho_scale
            width = height / self.camera.data.BIMCameraProperties.raster_y * self.camera.data.BIMCameraProperties.raster_x
        level_obj = annotation.Annotator.get_annotation_obj('Section Level', 'curve')

        width_in_mm = width * 1000
        if self.camera.data.BIMCameraProperties.diagram_scale == 'CUSTOM':
            human_scale, fraction = self.camera.data.BIMCameraProperties.custom_diagram_scale.split('|')
        else:
            human_scale, fraction = self.camera.data.BIMCameraProperties.diagram_scale.split('|')
        numerator, denominator = fraction.split('/')
        scale = float(numerator) / float(denominator)
        real_world_width_in_mm = width_in_mm * scale
        offset_in_mm = 20
        offset_percentage = offset_in_mm / real_world_width_in_mm

        for obj in self.levels:
            projection = self.project_point_onto_camera(obj.location)
            co1 = self.camera.matrix_world @ Vector((width/2-(offset_percentage * width), projection[1], -1))
            co2 = self.camera.matrix_world @ Vector((-(width/2), projection[1], -1))
            annotation.Annotator.add_line_to_annotation(level_obj, co1, co2)

    def project_point_onto_camera(self, point):
        projection = self.camera.matrix_world.to_quaternion() @ Vector((0, 0, -1))
        return self.camera.matrix_world.inverted() @ geometry.intersect_line_plane(
            point.xyz,
            point.xyz-projection,
            self.camera.location,
            projection)


class ResizeText(bpy.types.Operator):
    bl_idname = 'bim.resize_text'
    bl_label = 'Resize Text'

    def execute(self, context):
        for obj in bpy.context.scene.camera.users_collection[0].objects:
            if isinstance(obj.data, bpy.types.TextCurve):
                annotation.Annotator.resize_text(obj)
        return {'FINISHED'}


class AddVariable(bpy.types.Operator):
    bl_idname = 'bim.add_variable'
    bl_label = 'Add Variable'

    def execute(self, context):
        bpy.context.active_object.data.BIMTextProperties.variables.add()
        return {'FINISHED'}


class RemoveVariable(bpy.types.Operator):
    bl_idname = 'bim.remove_variable'
    bl_label = 'Remove Variable'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.active_object.data.BIMTextProperties.variables.remove(self.index)
        return {'FINISHED'}


class PropagateTextData(bpy.types.Operator):
    bl_idname = 'bim.propagate_text_data'
    bl_label = 'Propagate Text Data'

    def execute(self, context):
        source = bpy.context.active_object
        for obj in bpy.context.selected_objects:
            if obj == source:
                continue
            obj.data.body = source.data.body
            obj.data.align_x = source.data.align_x
            obj.data.align_y = source.data.align_y
            obj.data.BIMTextProperties.font_size = source.data.BIMTextProperties.font_size
            obj.data.BIMTextProperties.symbol = source.data.BIMTextProperties.symbol
            while len(obj.data.BIMTextProperties.variables) > 0:
                obj.data.BIMTextProperties.variables.remove(0)
            for variable in source.data.BIMTextProperties.variables:
                new_variable = obj.data.BIMTextProperties.variables.add()
                new_variable.name = variable.name
                new_variable.prop_key = variable.prop_key
        return {'FINISHED'}


class PushRepresentation(bpy.types.Operator):
    bl_idname = 'bim.push_representation'
    bl_label = 'Push Representation'

    # Warning: This is an incredibly experimental operator.
    def execute(self, context):
        self.file = ifc.IfcStore.get_file()

        logger = logging.getLogger('ExportIFC')
        output_file = 'tmp.ifc'
        ifc_export_settings = export_ifc.IfcExportSettings.factory(context, output_file, logger)
        qto_calculator = qto.QtoCalculator()
        ifc_parser = export_ifc.IfcParser(ifc_export_settings, qto_calculator)
        ifc_parser.parse([bpy.context.active_object])
        self.ifc_exporter = export_ifc.IfcExporter(ifc_export_settings, ifc_parser)
        self.ifc_exporter.file = ifcopenshell.file(schema=self.file.schema)
        self.ifc_exporter.create_origin()
        self.ifc_exporter.create_rep_context()
        self.ifc_exporter.create_representations()

        self.context, self.subcontext, self.target_view, self.mesh_name = bpy.context.active_object.data.name.split('/')
        rep_context = self.get_geometric_representation_context()

        for key, rep in self.ifc_exporter.ifc_parser.representations.items():
            if key != bpy.context.active_object.data.name:
                continue
            if rep_context:
                self.ifc_exporter.file.add(rep_context)
                rep['ifc'].MappedRepresentation.ContextOfItems = rep_context
            self.push_representation(rep['ifc'])
            break
        self.file.write(bpy.context.scene.BIMProperties.ifc_file[0:-4] + '-patch.ifc')
        return {'FINISHED'}

    def get_geometric_representation_context(self):
        for element in self.file.by_type('IfcGeometricRepresentationSubContext'):
            if self.is_current_context(element):
                return element

    def push_representation(self, new_representation):
        element = self.file.by_guid(bpy.context.active_object.BIMObjectProperties.attributes.get('GlobalId').string_value)
        old_shape = None
        new_shape = self.file.add(new_representation.MappedRepresentation)
        if element.is_a('IfcProduct'):
            representations = element.Representation.Representations
        else:
            representations = [rm.MappedRepresentation for rm in element.RepresentationMaps]
        for representation in representations:
            if self.is_current_context(representation.ContextOfItems):
                old_shape = self.resolve_mapped_representation(representation)
                break
        if old_shape:
            self.swap_old_representation(old_shape, new_shape)
        else:
            self.add_new_representation(element, new_shape)

    def resolve_mapped_representation(self, representation):
        if representation.RepresentationType == 'MappedRepresentation':
            if representation.Items:
                return representation.Items[0].MappingSource.MappedRepresentation
        return representation

    def swap_old_representation(self, old, new):
        inverse_elements = self.file.get_inverse(old)
        for element in inverse_elements:
            for i, attribute in enumerate(element):
                if (isinstance(attribute, list) or isinstance(attribute, tuple)) \
                        and old in attribute:
                    items = list(attribute)
                    for j, item in enumerate(items):
                        if item == old:
                            del items[j]
                    items.append(new)
                    element[i] = items
                elif attribute == old:
                    element[i] = new

    def add_new_representation(self, element, new):
        if element.is_a('IfcProduct'):
            self.add_new_representation_to_product(element, new)
            return

        if element.RepresentationMaps:
            representation_maps = list(element.RepresentationMaps)
            representation_maps.append(self.file.createIfcRepresentationMap(self.ifc_exporter.origin, new))
            element.RepresentationMaps = representation_maps
        else:
            element.RepresentationMaps = (self.file.createIfcRepresentationMap(self.ifc_exporter.origin, new))

        if hasattr(element, 'Types'):
            related_objects = element.Types[0].RelatedObjects
        elif hasattr(element, 'ObjectTypeOf'): # IFC2X3
            related_objects = element.ObjectTypeOf[0].RelatedObjects

        for related_object in related_objects:
            self.add_new_representation_to_product(related_object, new)

    def add_new_representation_to_product(self, element, new):
        representations = list(element.Representation.Representations)
        representations.append(new)
        element.Representation.Representations = representations

    def is_current_context(self, element):
        return element.ContextType == self.context \
            and element.ContextIdentifier == self.subcontext \
            and element.TargetView == self.target_view


class ConvertLocalToGlobal(bpy.types.Operator):
    bl_idname = 'bim.convert_local_to_global'
    bl_label = 'Convert Local To Global'

    def execute(self, context):
        x, y, z = bpy.context.scene.cursor.location

        if bpy.context.scene.MapConversion.scale:
            scale = float(bpy.context.scene.MapConversion.scale)
        else:
            scale = 1.

        rotation = atan2(
            float(bpy.context.scene.MapConversion.x_axis_ordinate),
            float(bpy.context.scene.MapConversion.x_axis_abscissa))
        a = scale * cos(rotation)
        b = scale * sin(rotation)

        eastings = (a * x) - (b * y) + float(bpy.context.scene.MapConversion.eastings)
        northings = (b * x) + (a * y) + float(bpy.context.scene.MapConversion.northings)
        height = z + float(bpy.context.scene.MapConversion.orthogonal_height)

        bpy.context.scene.cursor.location = (eastings, northings, height)
        return {'FINISHED'}


class GuessQuantity(bpy.types.Operator):
    bl_idname = 'bim.guess_quantity'
    bl_label = 'Guess Quantity'
    qto_index: bpy.props.IntProperty()
    prop_index: bpy.props.IntProperty()

    def execute(self, context):
        self.qto_calculator = qto.QtoCalculator()
        source_qto = bpy.context.active_object.BIMObjectProperties.qtos[self.qto_index]
        props = source_qto.properties
        prop = props[self.prop_index]
        for obj in bpy.context.selected_objects:
            dest_qto = obj.BIMObjectProperties.qtos.get(source_qto.name)
            if not dest_qto:
                if source_qto.name not in obj.BIMObjectProperties.qto_name:
                    continue
                dest_qto = self.add_qto(obj, source_qto.name)
            prop = dest_qto.properties.get(prop.name)
            self.guess_quantity(obj, prop, props)
        return {'FINISHED'}

    def guess_quantity(self, obj, prop, props):
        quantity = self.qto_calculator.guess_quantity(
            prop.name, [p.name for p in props], obj)
        if 'area' in prop.name.lower():
            if bpy.context.scene.BIMProperties.area_unit:
                prefix, name = self.get_prefix_name(bpy.context.scene.BIMProperties.area_unit)
                quantity = helper.SIUnitHelper.convert(quantity, None, 'SQUARE_METRE', prefix, name)
        elif 'volume' in prop.name.lower():
            if bpy.context.scene.BIMProperties.volume_unit:
                prefix, name = self.get_prefix_name(bpy.context.scene.BIMProperties.volume_unit)
                quantity = helper.SIUnitHelper.convert(quantity, None, 'CUBIC_METRE', prefix, name)
        else:
            prefix, name = self.get_blender_prefix_name()
            quantity = helper.SIUnitHelper.convert(quantity, None, 'METRE', prefix, name)
        prop.string_value = str(round(quantity, 3))

    def add_qto(self, obj, name):
        if name not in schema.ifc.qtos:
            return
        qto = obj.BIMObjectProperties.qtos.add()
        qto.name = name
        for prop_name in schema.ifc.qtos[name]['HasPropertyTemplates'].keys():
            prop = qto.properties.add()
            prop.name = prop_name
        return qto

    def get_prefix_name(self, value):
        if '/' in value:
            return value.split('/')
        return None, value

    def get_blender_prefix_name(self):
        if bpy.context.scene.unit_settings.system == 'IMPERIAL':
            if bpy.context.scene.unit_settings.length_unit == 'INCHES':
                return None, 'inch'
            elif bpy.context.scene.unit_settings.length_unit == 'FEET':
                return None, 'foot'
        elif bpy.context.scene.unit_settings.system == 'METRIC':
            if bpy.context.scene.unit_settings.length_unit == 'METERS':
                return None, 'METRE'
            return bpy.context.scene.unit_settings.length_unit[0:-len('METERS')], 'METRE'


class ExecuteBIMTester(bpy.types.Operator):
    bl_idname = 'bim.execute_bim_tester'
    bl_label = 'Execute BIMTester'

    def execute(self, context):
        import bimtester
        filename = os.path.join(
            bpy.context.scene.BIMProperties.features_dir,
            bpy.context.scene.BIMProperties.features_file + '.feature')
        cwd = os.getcwd()
        os.chdir(bpy.context.scene.BIMProperties.features_dir)
        bimtester.run_tests({'feature': filename, 'advanced_arguments': None, 'console': False})
        bimtester.generate_report()
        webbrowser.open(os.path.join(
            bpy.context.scene.BIMProperties.features_dir,
            'report', bpy.context.scene.BIMProperties.features_file + '.feature.html'))
        os.chdir(cwd)
        return {'FINISHED'}


class BIMTesterPurge(bpy.types.Operator):
    bl_idname = 'bim.bim_tester_purge'
    bl_label = 'Purge Tests'

    def execute(self, context):
        import bimtester
        filename = os.path.join(
            bpy.context.scene.BIMProperties.features_dir,
            bpy.context.scene.BIMProperties.features_file + '.feature')
        cwd = os.getcwd()
        os.chdir(bpy.context.scene.BIMProperties.features_dir)
        bimtester.TestPurger().purge()
        os.chdir(cwd)
        return {'FINISHED'}


class SelectIfcPatchInput(bpy.types.Operator):
    bl_idname = "bim.select_ifc_patch_input"
    bl_label = "Select IFC Patch Input"
    filter_glob: bpy.props.StringProperty(default="*.ifc", options={'HIDDEN'})
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")

    def execute(self, context):
        bpy.context.scene.BIMProperties.ifc_patch_input = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class SelectIfcPatchOutput(bpy.types.Operator):
    bl_idname = "bim.select_ifc_patch_output"
    bl_label = "Select IFC Patch Output"
    filename_ext = '.ifc'
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")

    def execute(self, context):
        bpy.context.scene.BIMProperties.ifc_patch_output = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class CalculateEdgeLengths(bpy.types.Operator):
    bl_idname = 'bim.calculate_edge_lengths'
    bl_label = 'Calculate Edge Lengths'

    def execute(self, context):
        result = 0
        for obj in bpy.context.selected_objects:
            if not obj.data or not obj.data.edges:
                continue
            for edge in obj.data.edges:
                if edge.select:
                    result += (obj.data.vertices[edge.vertices[1]].co -
                        obj.data.vertices[edge.vertices[0]].co).length
        bpy.context.scene.BIMProperties.qto_result = str(round(result, 3))
        return {'FINISHED'}


class CalculateFaceAreas(bpy.types.Operator):
    bl_idname = 'bim.calculate_face_areas'
    bl_label = 'Calculate Face Areas'

    def execute(self, context):
        result = 0
        for obj in bpy.context.selected_objects:
            if not obj.data or not obj.data.polygons:
                continue
            for polygon in obj.data.polygons:
                if polygon.select:
                    result += polygon.area
        bpy.context.scene.BIMProperties.qto_result = str(round(result, 3))
        return {'FINISHED'}


class CalculateObjectVolumes(bpy.types.Operator):
    bl_idname = 'bim.calculate_object_volumes'
    bl_label = 'Calculate Object Volumes'

    def execute(self, context):
        qto_calculator = qto.QtoCalculator()
        result = 0
        for obj in bpy.context.selected_objects:
            if not obj.data:
                continue
            result += qto_calculator.get_volume(obj)
        bpy.context.scene.BIMProperties.qto_result = str(round(result, 3))
        return {'FINISHED'}


class AddOpening(bpy.types.Operator):
    bl_idname = 'bim.add_opening'
    bl_label = 'Add Opening'

    def execute(self, context):
        opening = context.active_object
        if context.selected_objects[0] != context.active_object:
            obj = context.selected_objects[0]
        else:
            obj = context.selected_objects[1]
        modifier = obj.modifiers.new('IfcOpeningElement', 'BOOLEAN')
        modifier.operation = 'DIFFERENCE'
        modifier.object = opening
        return {'FINISHED'}


class SetOverrideColour(bpy.types.Operator):
    bl_idname = 'bim.set_override_colour'
    bl_label = 'Set Override Colour'

    def execute(self, context):
        result = 0
        for obj in bpy.context.selected_objects:
            obj.color = bpy.context.scene.BIMProperties.override_colour
        area = next(area for area in bpy.context.screen.areas if area.type == 'VIEW_3D')
        area.spaces[0].shading.color_type = 'OBJECT'
        return {'FINISHED'}


class AddDrawingStyle(bpy.types.Operator):
    bl_idname = 'bim.add_drawing_style'
    bl_label = 'Add Drawing Style'

    def execute(self, context):
        new = bpy.context.scene.DocProperties.drawing_styles.add()
        new.name = 'New Drawing Style'
        return {'FINISHED'}


class RemoveDrawingStyle(bpy.types.Operator):
    bl_idname = 'bim.remove_drawing_style'
    bl_label = 'Remove Drawing Style'
    index: bpy.props.IntProperty()

    def execute(self, context):
        bpy.context.scene.DocProperties.drawing_styles.remove(self.index)
        return {'FINISHED'}


class SaveDrawingStyle(bpy.types.Operator):
    bl_idname = 'bim.save_drawing_style'
    bl_label = 'Save Drawing Style'
    index: bpy.props.StringProperty()

    def execute(self, context):
        style = {
            'bpy.data.worlds[0].color': tuple(bpy.data.worlds[0].color),
            'bpy.context.scene.render.engine': bpy.context.scene.render.engine,
            'bpy.context.scene.display.shading.show_object_outline': bpy.context.scene.display.shading.show_object_outline,
            'bpy.context.scene.display.shading.show_cavity': bpy.context.scene.display.shading.show_cavity,
            'bpy.context.scene.display.shading.cavity_type': bpy.context.scene.display.shading.cavity_type,
            'bpy.context.scene.display.shading.curvature_ridge_factor': bpy.context.scene.display.shading.curvature_ridge_factor,
            'bpy.context.scene.display.shading.curvature_valley_factor': bpy.context.scene.display.shading.curvature_valley_factor,
            'bpy.context.scene.view_settings.view_transform': bpy.context.scene.view_settings.view_transform,
            'bpy.context.scene.display.shading.light': bpy.context.scene.display.shading.light,
            'bpy.context.scene.display.shading.color_type': bpy.context.scene.display.shading.color_type,
            'bpy.context.scene.display.shading.single_color': tuple(bpy.context.scene.display.shading.single_color),
            'bpy.context.scene.view_settings.use_curve_mapping': bpy.context.scene.view_settings.use_curve_mapping,
        }
        if self.index:
            index = int(self.index)
        else:
            index = bpy.context.active_object.data.BIMCameraProperties.active_drawing_style_index
        bpy.context.scene.DocProperties.drawing_styles[index].raster_style = json.dumps(style)
        return {'FINISHED'}


class ActivateDrawingStyle(bpy.types.Operator):
    bl_idname = 'bim.activate_drawing_style'
    bl_label = 'Activate Drawing Style'

    def execute(self, context):
        self.drawing_style = bpy.context.scene.DocProperties.drawing_styles[context.scene.camera.data.BIMCameraProperties.active_drawing_style_index]
        self.set_raster_style()
        self.set_query()
        return {'FINISHED'}

    def set_raster_style(self):
        style = json.loads(self.drawing_style.raster_style)
        bpy.data.worlds[0].color = style['bpy.data.worlds[0].color']
        bpy.context.scene.render.engine = style['bpy.context.scene.render.engine']
        bpy.context.scene.display.shading.show_object_outline = style['bpy.context.scene.display.shading.show_object_outline']
        bpy.context.scene.display.shading.show_cavity = style['bpy.context.scene.display.shading.show_cavity']
        bpy.context.scene.display.shading.cavity_type = style['bpy.context.scene.display.shading.cavity_type']
        bpy.context.scene.display.shading.curvature_ridge_factor = style['bpy.context.scene.display.shading.curvature_ridge_factor']
        bpy.context.scene.display.shading.curvature_valley_factor = style['bpy.context.scene.display.shading.curvature_valley_factor']
        bpy.context.scene.view_settings.view_transform = style['bpy.context.scene.view_settings.view_transform']
        bpy.context.scene.display.shading.light = style['bpy.context.scene.display.shading.light']
        bpy.context.scene.display.shading.color_type = style['bpy.context.scene.display.shading.color_type']
        bpy.context.scene.display.shading.single_color = style['bpy.context.scene.display.shading.single_color']
        bpy.context.scene.view_settings.use_curve_mapping = style['bpy.context.scene.view_settings.use_curve_mapping']

    def set_query(self):
        self.selector = ifcopenshell.util.selector.Selector()
        self.include_global_ids = []
        self.exclude_global_ids = []
        for ifc_file in bpy.context.scene.DocProperties.ifc_files:
            try:
                ifc = ifcopenshell.open(ifc_file.name)
            except:
                continue
            if self.drawing_style.include_query:
                results = self.selector.parse(ifc, self.drawing_style.include_query)
                self.include_global_ids.extend([e.GlobalId for e in results])
            if self.drawing_style.exclude_query:
                results = self.selector.parse(ifc, self.drawing_style.exclude_query)
                self.exclude_global_ids.extend([e.GlobalId for e in results])
        if self.drawing_style.include_query:
            self.parse_filter_query('INCLUDE')
        else:
            for obj in bpy.context.scene.objects:
                obj.hide_viewport = False
        if self.drawing_style.exclude_query:
            self.parse_filter_query('EXCLUDE')

    def parse_filter_query(self, mode):
        if mode == 'INCLUDE':
            objects = bpy.context.scene.objects
        elif mode == 'EXCLUDE':
            objects = bpy.context.visible_objects
        for obj in objects:
            if mode == 'INCLUDE':
                obj.hide_viewport = False # Note: this breaks alt-H
            global_id = obj.BIMObjectProperties.attributes.get('GlobalId')
            if not global_id:
                continue
            global_id = global_id.string_value
            if mode == 'INCLUDE':
                if global_id not in self.include_global_ids:
                    obj.hide_viewport = True # Note: this breaks alt-H
            elif mode == 'EXCLUDE':
                if global_id in self.exclude_global_ids:
                    obj.hide_viewport = True # Note: this breaks alt-H


class AddDrawing(bpy.types.Operator):
    bl_idname = 'bim.add_drawing'
    bl_label = 'Add Drawing'

    def execute(self, context):
        new = bpy.context.scene.DocProperties.drawings.add()
        new.name = 'DRAWING {}'.format(len(bpy.context.scene.DocProperties.drawings))
        if not bpy.data.collections.get('Views'):
            bpy.context.scene.collection.children.link(bpy.data.collections.new('Views'))
        views_collection = bpy.data.collections.get('Views')
        view_collection = bpy.data.collections.new('IfcGroup/' + new.name)
        views_collection.children.link(view_collection)
        camera = bpy.data.objects.new('IfcGroup/' + new.name,
                bpy.data.cameras.new('IfcGroup/' + new.name))
        camera.location = (0, 0, 1.7) # The view shall be 1.7m above the origin
        camera.data.type = 'ORTHO'
        camera.data.ortho_scale = 50 # The default of 6m is too small
        if bpy.context.scene.unit_settings.system == 'IMPERIAL':
            camera.data.BIMCameraProperties.diagram_scale = '1/8"=1\'-0"|1/96'
        else:
            camera.data.BIMCameraProperties.diagram_scale = '1:100|1/100'
        bpy.context.scene.camera = camera
        view_collection.objects.link(camera)
        area = next(area for area in bpy.context.screen.areas if area.type == 'VIEW_3D')
        area.spaces[0].region_3d.view_perspective = 'CAMERA'
        new.camera = camera
        return {'FINISHED'}


class RemoveDrawing(bpy.types.Operator):
    bl_idname = 'bim.remove_drawing'
    bl_label = 'Remove Drawing'
    index: bpy.props.IntProperty()

    def execute(self, context):
        props = bpy.context.scene.DocProperties
        camera = props.drawings[self.index].camera
        collection = camera.users_collection[0]
        for obj in collection.objects:
            bpy.data.objects.remove(obj)
        bpy.data.collections.remove(collection, do_unlink=True)
        props.drawings.remove(self.index)
        return {'FINISHED'}


class EditVectorStyle(bpy.types.Operator):
    bl_idname = 'bim.edit_vector_style'
    bl_label = 'Edit Vector Style'

    def execute(self, context):
        camera = context.scene.camera
        vector_style = context.scene.DocProperties.drawing_styles[camera.data.BIMCameraProperties.active_drawing_style_index].vector_style
        bpy.data.texts.load(os.path.join(context.scene.BIMProperties.data_dir, 'styles', vector_style + '.css'))
        return {'FINISHED'}


class PurgeProjectClassifications(bpy.types.Operator):
    bl_idname = 'bim.purge_project_classifications'
    bl_label = 'Purge Project Classifications'

    def execute(self, context):
        self.schema_dir = bpy.context.scene.BIMProperties.schema_dir
        path = os.path.join(self.schema_dir, 'project_classifications')
        files = os.listdir(path)
        for f in files:
            os.remove(os.path.join(path, f))
        from . import prop
        prop.classification_enum.clear()
        prop.getClassifications(self, context)
        return {'FINISHED'}


class RemoveSheet(bpy.types.Operator):
    bl_idname = 'bim.remove_sheet'
    bl_label = 'Remove Sheet'
    index: bpy.props.IntProperty()

    def execute(self, context):
        props = bpy.context.scene.DocProperties
        props.sheets.remove(self.index)
        return {'FINISHED'}


class AddSchedule(bpy.types.Operator):
    bl_idname = 'bim.add_schedule'
    bl_label = 'Add Schedule'

    def execute(self, context):
        new = bpy.context.scene.DocProperties.schedules.add()
        new.name = 'SCHEDULE {}'.format(len(bpy.context.scene.DocProperties.schedules))
        return {'FINISHED'}


class RemoveSchedule(bpy.types.Operator):
    bl_idname = 'bim.remove_schedule'
    bl_label = 'Remove Schedule'
    index: bpy.props.IntProperty()

    def execute(self, context):
        props = bpy.context.scene.DocProperties
        props.schedules.remove(self.index)
        return {'FINISHED'}


class SelectScheduleFile(bpy.types.Operator):
    bl_idname = "bim.select_schedule_file"
    bl_label = "Select Documentation IFC File"
    filepath: bpy.props.StringProperty(subtype="FILE_PATH")
    filter_glob: bpy.props.StringProperty(default="*.ods", options={'HIDDEN'})
    index: bpy.props.IntProperty()

    def execute(self, context):
        props = bpy.context.scene.DocProperties
        props.schedules[props.active_schedule_index].file = self.filepath
        return {'FINISHED'}

    def invoke(self, context, event):
        context.window_manager.fileselect_add(self)
        return {'RUNNING_MODAL'}


class BuildSchedule(bpy.types.Operator):
    bl_idname = 'bim.build_schedule'
    bl_label = 'Build Schedule'

    def execute(self, context):
        props = bpy.context.scene.DocProperties
        schedule = props.schedules[props.active_schedule_index]
        schedule_creator = scheduler.Scheduler()
        outfile = os.path.join(
            bpy.context.scene.BIMProperties.data_dir, 'schedules',
            schedule.name + '.svg')
        schedule_creator.schedule(schedule.file, outfile)
        webbrowser.open('file://' + outfile)
        return {'FINISHED'}


class AddScheduleToSheet(bpy.types.Operator):
    bl_idname = 'bim.add_schedule_to_sheet'
    bl_label = 'Add Schedule To Sheet'

    def execute(self, context):
        props = bpy.context.scene.DocProperties
        sheet_builder = sheeter.SheetBuilder()
        sheet_builder.data_dir = bpy.context.scene.BIMProperties.data_dir
        sheet_builder.add_schedule(
            props.schedules[props.active_schedule_index].name,
            props.sheets[props.active_sheet_index].name)
        return {'FINISHED'}


class SetViewportShadowFromSun(bpy.types.Operator):
    bl_idname = 'bim.set_viewport_shadow_from_sun'
    bl_label = 'Set Viewport Shadow from Sun'

    def execute(self, context):
        # The vector used for the light direction is a bit funny
        mat = Matrix(((-1.0, 0.0, 0.0, 0.0),
            (0.0, 0, 1.0, 0.0),
            (-0.0, -1.0, 0, 0.0),
            (0.0, 0.0, 0.0, 1.0)))
        context.scene.display.light_direction = mat.inverted() @ (context.active_object.matrix_world.to_quaternion() @ Vector((0,0,-1)))
        return {'FINISHED'}


class SetNorthOffset(bpy.types.Operator):
    bl_idname = 'bim.set_north_offset'
    bl_label = 'Set North Offset'

    def execute(self, context):
        context.scene.sun_pos_properties.north_offset = radians(ifcopenshell.util.geolocation.xy2angle(
            float(bpy.context.scene.MapConversion.x_axis_ordinate),
            float(bpy.context.scene.MapConversion.x_axis_abscissa)))
        return {'FINISHED'}


class GetNorthOffset(bpy.types.Operator):
    bl_idname = 'bim.get_north_offset'
    bl_label = 'Get North Offset'

    def execute(self, context):
        x_angle = -context.scene.sun_pos_properties.north_offset
        bpy.context.scene.MapConversion.x_axis_abscissa = str(cos(x_angle))
        bpy.context.scene.MapConversion.x_axis_ordinate = str(sin(x_angle))
        return {'FINISHED'}


class AddDrawingStyleAttribute(bpy.types.Operator):
    bl_idname = 'bim.add_drawing_style_attribute'
    bl_label = 'Add Drawing Style Attribute'

    def execute(self, context):
        props = bpy.context.scene.camera.data.BIMCameraProperties
        context.scene.DocProperties.drawing_styles[props.active_drawing_style_index].attributes.add()
        return {'FINISHED'}


class RemoveDrawingStyleAttribute(bpy.types.Operator):
    bl_idname = 'bim.remove_drawing_style_attribute'
    bl_label = 'Remove Drawing Style Attribute'
    index: bpy.props.IntProperty()

    def execute(self, context):
        props = bpy.context.scene.camera.data.BIMCameraProperties
        context.scene.DocProperties.drawing_styles[props.active_drawing_style_index].attributes.remove(self.index)
        return {'FINISHED'}


class CreateShapeFromStepId(bpy.types.Operator):
    bl_idname = 'bim.create_shape_from_step_id'
    bl_label = 'Create Shape From STEP ID'

    def execute(self, context):
        logger = logging.getLogger('ImportIFC')
        self.ifc_import_settings = import_ifc.IfcImportSettings.factory(bpy.context, ifc.IfcStore.path, logger)
        self.file = ifc.IfcStore.get_file()
        element = self.file.by_id(int(bpy.context.scene.BIMDebugProperties.step_id))
        settings = ifcopenshell.geom.settings()
        #settings.set(settings.INCLUDE_CURVES, True)
        shape = ifcopenshell.geom.create_shape(settings, element)
        ifc_importer = import_ifc.IfcImporter(self.ifc_import_settings)
        ifc_importer.file = self.file
        mesh = ifc_importer.create_mesh(element, shape)
        obj = bpy.data.objects.new('Debug', mesh)
        bpy.context.scene.collection.objects.link(obj)
        return {'FINISHED'}


class SelectHighPolygonMeshes(bpy.types.Operator):
    bl_idname = 'bim.select_high_polygon_meshes'
    bl_label = 'Select High Polygon Meshes'

    def execute(self, context):
        results = {}
        for obj in bpy.data.objects:
            if not isinstance(obj.data, bpy.types.Mesh) \
                    or len(obj.data.polygons) < int(bpy.context.scene.BIMDebugProperties.number_of_polygons):
                continue
            try:
                obj.select_set(True)
            except:
                # If it is not in the view layer
                pass
            relating_type = obj.BIMObjectProperties.relating_type
            if relating_type:
                relating_type.select_set(True)
        return {'FINISHED'}


class RefreshDrawingList(bpy.types.Operator):
    bl_idname = 'bim.refresh_drawing_list'
    bl_label = 'Refresh Drawing List'

    def execute(self, context):
        while len(bpy.context.scene.DocProperties.drawings) > 0:
            bpy.context.scene.DocProperties.drawings.remove(0)
        for obj in bpy.context.scene.objects:
            if not isinstance(obj.data, bpy.types.Camera):
                continue
            if 'IfcGroup/' in obj.name and obj.users_collection[0].name == obj.name:
                new = bpy.context.scene.DocProperties.drawings.add()
                new.name = obj.name.split('/')[1]
                new.camera = obj
        return {'FINISHED'}