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api.unassign_representation_styles
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Andrej730
@@ -0,0 +1,87 @@
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# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
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#
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# This file is part of IfcOpenShell.
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#
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# IfcOpenShell is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# IfcOpenShell is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with IfcOpenShell. If not, see <http://www.gnu.org/licenses/>.
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class Usecase:
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def __init__(self, file, shape_representation=None, styles=None, should_use_presentation_style_assignment=False):
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"""Unassigns styles directly assigned to an object representation
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This does the inverse of assign_representation_styles.
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:param shape_representation: The IfcShapeRepresentation of the object
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that you want to unassign styles from.
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:type shape_representation: ifcopenshell.entity_instance.entity_instance
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:param styles: A list of presentation styles, typically IfcSurfaceStyle.
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The number of items in the list should correlate with the number of
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items in the shape_representation's Items attribute. If you have
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more items than styles, the last style is used.
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:type styles: list[ifcopenshell.entity_instance.entity_instance]
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:param should_use_presentation_style_assignment: This is a technical
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detail to accomodate a bug in Revit. This should always be left as
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the default of False, unless you are finding that colours aren't
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showing up in Revit. In that case, set it to True, but keep in mind
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that this is no longer a valid IFC. Blame Autodesk.
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:type should_use_presentation_style_assignment: bool
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:return: None
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:rtype: None
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Example:
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.. code:: python
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ifcopenshell.api.run("style.unassign_representation_styles", model,
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shape_representation=representation, styles=[style])
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"""
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self.file = file
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self.settings = {
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"shape_representation": shape_representation,
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"styles": styles or [],
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"should_use_presentation_style_assignment": should_use_presentation_style_assignment,
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}
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def execute(self):
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if not self.settings["styles"]:
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return []
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self.results = []
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use_style_assignment = self.file.schema == "IFC2X3" or self.settings["should_use_presentation_style_assignment"]
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for element in self.file.traverse(self.settings["shape_representation"]):
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if not element.is_a("IfcShapeRepresentation"):
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continue
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for item in element.Items:
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if not item.is_a("IfcGeometricRepresentationItem"):
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continue
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if not item.StyledByItem:
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continue
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item = item.StyledByItem[0]
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if use_style_assignment:
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for style_ in item.Styles:
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if style_.is_a("IfcPresentationStyleAssignment"):
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self.remove_styles(style_)
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self.remove_styles(item)
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def remove_styles(self, item):
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"""Removes styles from a styled item or a style assignment
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and purges item if doesn't have any styles after"""
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styles = [s for s in item.Styles if s not in self.settings["styles"]]
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if not styles:
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self.file.remove(item)
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elif len(styles) != len(item.Styles):
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item.Styles = styles
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@@ -0,0 +1,111 @@
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# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
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#
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# This file is part of IfcOpenShell.
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#
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# IfcOpenShell is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# IfcOpenShell is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with IfcOpenShell. If not, see <http://www.gnu.org/licenses/>.
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import pytest
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import test.bootstrap
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import ifcopenshell
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import ifcopenshell.api
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class TestUnassignRepresentationStyles(test.bootstrap.IFC4):
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def test_run(self):
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element = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcWall")
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product_shape = self.file.createIfcProductDefinitionShape()
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element.Representation = product_shape
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representation = self.file.createIfcShapeRepresentation()
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item = self.file.createIfcExtrudedAreaSolid()
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representation.Items = [item]
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style = self.file.createIfcSurfaceStyle()
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ifcopenshell.api.run(
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"style.assign_representation_styles", self.file, styles=[style], shape_representation=representation
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)
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style2 = self.file.createIfcSurfaceStyle()
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ifcopenshell.api.run(
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"style.assign_representation_styles", self.file, styles=[style2], shape_representation=representation
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)
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assert item.StyledByItem[0].Styles == (style, style2)
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ifcopenshell.api.run(
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"style.unassign_representation_styles", self.file, styles=[style], shape_representation=representation
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)
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assert item.StyledByItem[0].Styles == (style2,)
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# unassigning last style removes styled item
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ifcopenshell.api.run(
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"style.unassign_representation_styles", self.file, styles=[style2], shape_representation=representation
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)
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assert len(item.StyledByItem) == 0
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assert len(self.file.by_type("IfcStyledItem")) == 0
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def test_assign_using_style_assignment(self):
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element = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcWall")
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product_shape = self.file.createIfcProductDefinitionShape()
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element.Representation = product_shape
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representation = self.file.createIfcShapeRepresentation()
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item = self.file.createIfcExtrudedAreaSolid()
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representation.Items = [item]
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style = self.file.createIfcSurfaceStyle()
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ifcopenshell.api.run(
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"style.assign_representation_styles",
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self.file,
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styles=[style],
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shape_representation=representation,
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should_use_presentation_style_assignment=True,
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)
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style_assignment = self.file.by_type("IfcPresentationStyleAssignment")[0]
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# reusing existing styled item and style assignment
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style2 = self.file.createIfcSurfaceStyle()
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ifcopenshell.api.run(
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"style.assign_representation_styles",
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self.file,
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styles=[style2],
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shape_representation=representation,
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should_use_presentation_style_assignment=True,
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)
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assert style_assignment.Styles == (style, style2)
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ifcopenshell.api.run(
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"style.unassign_representation_styles",
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self.file,
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styles=[style],
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shape_representation=representation,
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should_use_presentation_style_assignment=True,
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)
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assert style_assignment.Styles == (style2,)
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# unassigning last style removes styled item and presentation style
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ifcopenshell.api.run(
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"style.unassign_representation_styles",
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self.file,
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styles=[style2],
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shape_representation=representation,
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should_use_presentation_style_assignment=True,
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)
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assert len(item.StyledByItem) == 0
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assert len(self.file.by_type("IfcStyledItem")) == 0
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assert len(self.file.by_type("IfcPresentationStyleAssignment")) == 0
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class TestUnassignRepresentationStylesIFC2X3(test.bootstrap.IFC2X3):
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def test_run(self):
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TestUnassignRepresentationStyles.test_assign_using_style_assignment(self)
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