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