e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Authors
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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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