LibreOffice Module vcl (master) 1
TextLayoutCache.cxx
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1/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
2/*
3 * This file is part of the LibreOffice project.
4 *
5 * This Source Code Form is subject to the terms of the Mozilla Public
6 * License, v. 2.0. If a copy of the MPL was not distributed with this
7 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 *
9 * This file incorporates work covered by the following license notice:
10 *
11 * Licensed to the Apache Software Foundation (ASF) under one or more
12 * contributor license agreements. See the NOTICE file distributed
13 * with this work for additional information regarding copyright
14 * ownership. The ASF licenses this file to you under the Apache
15 * License, Version 2.0 (the "License"); you may not use this file
16 * except in compliance with the License. You may obtain a copy of
17 * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 */
19
20#include <TextLayoutCache.hxx>
21
22#include <scrptrun.h>
23
24#include <o3tl/hash_combine.hxx>
25#include <o3tl/lru_map.hxx>
27#include <vcl/lazydelete.hxx>
28#include <officecfg/Office/Common.hxx>
29
30namespace vcl::text
31{
32TextLayoutCache::TextLayoutCache(sal_Unicode const* pStr, sal_Int32 const nEnd)
33{
34 vcl::ScriptRun aScriptRun(reinterpret_cast<const UChar*>(pStr), nEnd);
35 while (aScriptRun.next())
36 {
37 runs.emplace_back(aScriptRun.getScriptStart(), aScriptRun.getScriptEnd(),
38 aScriptRun.getScriptCode());
39 }
40}
41
42namespace
43{
44struct TextLayoutCacheCost
45{
46 size_t operator()(const std::shared_ptr<const TextLayoutCache>& item) const
47 {
48 return item->runs.size() * sizeof(item->runs.front());
49 }
50};
51} // namespace
52
53std::shared_ptr<const TextLayoutCache> TextLayoutCache::Create(OUString const& rString)
54{
56 FastStringCompareEqual, TextLayoutCacheCost>
57 Cache;
58 static vcl::DeleteOnDeinit<Cache> cache(
60 ? officecfg::Office::Common::Cache::Font::TextRunsCacheSize::get()
61 : 100);
62 if (Cache* map = cache.get())
63 {
64 auto it = map->find(rString);
65 if (it != map->end())
66 return it->second;
67 auto ret = std::make_shared<const TextLayoutCache>(rString.getStr(), rString.getLength());
68 map->insert({ rString, ret });
69 return ret;
70 }
71 return std::make_shared<const TextLayoutCache>(rString.getStr(), rString.getLength());
72}
73}
74
75/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
static bool IsFuzzing()
UBool next()
Definition: scrptrun.cxx:149
int32_t getScriptStart() const
Definition: scrptrun.h:122
UScriptCode getScriptCode() const
Definition: scrptrun.h:126
int32_t getScriptEnd() const
Definition: scrptrun.h:124
std::vector< vcl::text::Run > runs
TextLayoutCache(sal_Unicode const *pStr, sal_Int32 const nEnd)
static std::shared_ptr< const vcl::text::TextLayoutCache > Create(OUString const &)
std::map< OUString, rtl::Reference< Entity > > map
sal_uInt16 sal_Unicode