74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <TextLayoutCache.hxx>
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#include <scrptrun.h>
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#include <o3tl/hash_combine.hxx>
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#include <o3tl/lru_map.hxx>
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#include <unotools/configmgr.hxx>
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#include <tools/lazydelete.hxx>
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#include <officecfg/Office/Common.hxx>
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namespace vcl::text
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{
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TextLayoutCache::TextLayoutCache(sal_Unicode const* pStr, sal_Int32 const nEnd)
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{
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vcl::ScriptRun aScriptRun(reinterpret_cast<const UChar*>(pStr), nEnd);
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while (aScriptRun.next())
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{
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runs.emplace_back(aScriptRun.getScriptStart(), aScriptRun.getScriptEnd(),
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aScriptRun.getScriptCode());
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}
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}
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namespace
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{
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struct TextLayoutCacheCost
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{
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size_t operator()(const std::shared_ptr<const TextLayoutCache>& item) const
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{
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return item->runs.size() * sizeof(item->runs.front());
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}
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};
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} // namespace
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std::shared_ptr<const TextLayoutCache> TextLayoutCache::Create(OUString const& rString)
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{
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typedef o3tl::lru_map<OUString, std::shared_ptr<const TextLayoutCache>, FirstCharsStringHash,
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FastStringCompareEqual, TextLayoutCacheCost>
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Cache;
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static tools::DeleteOnDeinit<Cache> cache(
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!comphelper::IsFuzzing() ? officecfg::Office::Common::Cache::Font::TextRunsCacheSize::get()
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: 100);
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if (Cache* map = cache.get())
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{
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auto it = map->find(rString);
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if (it != map->end())
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return it->second;
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auto ret = std::make_shared<const TextLayoutCache>(rString.getStr(), rString.getLength());
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map->insert({ rString, ret });
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return ret;
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}
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return std::make_shared<const TextLayoutCache>(rString.getStr(), rString.getLength());
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
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