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59 lines
2.1 KiB
Python
59 lines
2.1 KiB
Python
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"""Utility functions not closely tied to other spec_tools types."""
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# Copyright (c) 2018-2019 Collabora, Ltd.
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# Copyright (c) 2013-2020 The Khronos Group Inc.
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#
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# SPDX-License-Identifier: Apache-2.0
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def getElemName(elem, default=None):
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"""Get the name associated with an element, either a name child or name attribute."""
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name_elem = elem.find('name')
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if name_elem is not None:
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return name_elem.text
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# Fallback if there is no child.
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return elem.get('name', default)
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def getElemType(elem, default=None):
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"""Get the type associated with an element, either a type child or type attribute."""
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type_elem = elem.find('type')
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if type_elem is not None:
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return type_elem.text
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# Fallback if there is no child.
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return elem.get('type', default)
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def findFirstWithPredicate(collection, pred):
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"""Return the first element that satisfies the predicate, or None if none exist.
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NOTE: Some places where this is used might be better served by changing to a dictionary.
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"""
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for elt in collection:
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if pred(elt):
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return elt
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return None
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def findNamedElem(elems, name):
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"""Traverse a collection of elements with 'name' nodes or attributes, looking for and returning one with the right name.
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NOTE: Many places where this is used might be better served by changing to a dictionary.
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"""
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return findFirstWithPredicate(elems, lambda elem: getElemName(elem) == name)
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def findTypedElem(elems, typename):
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"""Traverse a collection of elements with 'type' nodes or attributes, looking for and returning one with the right typename.
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NOTE: Many places where this is used might be better served by changing to a dictionary.
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"""
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return findFirstWithPredicate(elems, lambda elem: getElemType(elem) == typename)
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def findNamedObject(collection, name):
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"""Traverse a collection of elements with 'name' attributes, looking for and returning one with the right name.
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NOTE: Many places where this is used might be better served by changing to a dictionary.
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"""
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return findFirstWithPredicate(collection, lambda elt: elt.name == name)
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