c1bc70b711
A lot of files were missing copyright field in the header and
the Blender Foundation contributed to them in a sense of bug
fixing and general maintenance.
This change makes it explicit that those files are at least
partially copyrighted by the Blender Foundation.
Note that this does not make it so the Blender Foundation is
the only holder of the copyright in those files, and developers
who do not have a signed contract with the foundation still
hold the copyright as well.
Another aspect of this change is using SPDX format for the
header. We already used it for the license specification,
and now we state it for the copyright as well, following the
FAQ:
https://reuse.software/faq/
67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Foundation
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#pragma once
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#include <atomic>
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#include "BLI_function_ref.hh"
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#include "BLI_map.hh"
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#include "BLI_vector.hh"
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namespace blender::ed::spreadsheet {
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/**
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* A generic cache for the spreadsheet. Different data sources can cache custom data using custom
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* keys.
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*
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* Elements are removed from the cache when they are not used during a redraw.
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*/
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class SpreadsheetCache {
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public:
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class Key {
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public:
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virtual ~Key() = default;
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mutable bool is_used = false;
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virtual uint64_t hash() const = 0;
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friend bool operator==(const Key &a, const Key &b)
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{
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return a.is_equal_to(b);
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}
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private:
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virtual bool is_equal_to(const Key &other) const = 0;
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};
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class Value {
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public:
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virtual ~Value() = default;
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};
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private:
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Vector<std::unique_ptr<Key>> keys_;
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Map<std::reference_wrapper<const Key>, std::unique_ptr<Value>> cache_map_;
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public:
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/* Adding or looking up a key tags it as being used, so that it won't be removed. */
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void add(std::unique_ptr<Key> key, std::unique_ptr<Value> value);
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Value *lookup(const Key &key);
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Value &lookup_or_add(std::unique_ptr<Key> key,
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FunctionRef<std::unique_ptr<Value>()> create_value);
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void set_all_unused();
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void remove_all_unused();
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template<typename T> T &lookup_or_add(std::unique_ptr<Key> key)
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{
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return dynamic_cast<T &>(
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this->lookup_or_add(std::move(key), []() { return std::make_unique<T>(); }));
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}
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};
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} // namespace blender::ed::spreadsheet
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