0eedac9d66
This change fixes an issue causing incorrect font fallback for certain RTL grapheme clusters. Change-Id: I6cff7f175b766d40c4faf204d1d65c8c366eb3e3 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/168410 Tested-by: Jenkins Reviewed-by: Jonathan Clark <jonathan@libreoffice.org>
80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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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#pragma once
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#include <vcl/dllapi.h>
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#include <boost/container/small_vector.hpp>
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// used for managing runs e.g. for BiDi, glyph and script fallback
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class VCL_DLLPUBLIC ImplLayoutRuns
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{
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public:
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struct Run
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{
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int m_nMinRunPos;
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int m_nEndRunPos;
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bool m_bRTL;
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Run(int nMinRunPos, int nEndRunPos, bool bRTL)
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: m_nMinRunPos(nMinRunPos)
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, m_nEndRunPos(nEndRunPos)
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, m_bRTL(bRTL)
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{
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}
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inline bool Contains(int nCharPos) const
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{
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return (m_nMinRunPos <= nCharPos) && (nCharPos < m_nEndRunPos);
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}
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bool operator==(const Run&) const = default;
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};
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private:
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int mnRunIndex;
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boost::container::small_vector<Run, 8> maRuns;
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public:
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ImplLayoutRuns() { mnRunIndex = 0; }
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void Clear() { maRuns.clear(); }
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void AddPos(int nCharPos, bool bRTL);
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void AddRun(int nMinRunPos, int nEndRunPos, bool bRTL);
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void Normalize();
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void ReverseTail(size_t nTailIndex);
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bool IsEmpty() const { return maRuns.empty(); }
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void ResetPos() { mnRunIndex = 0; }
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void NextRun() { ++mnRunIndex; }
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bool GetRun(int* nMinRunPos, int* nEndRunPos, bool* bRTL) const;
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bool GetNextPos(int* nCharPos, bool* bRTL);
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bool PosIsInRun(int nCharPos) const;
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bool PosIsInAnyRun(int nCharPos) const;
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inline auto begin() const { return maRuns.begin(); }
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inline auto end() const { return maRuns.end(); }
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inline const auto& at(size_t nIndex) const { return maRuns.at(nIndex); }
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inline auto size() const { return maRuns.size(); }
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static void PrepareFallbackRuns(ImplLayoutRuns* paRuns, ImplLayoutRuns* paFallbackRuns);
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};
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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