114 lines
2.8 KiB
C++
114 lines
2.8 KiB
C++
/* GRAPHITE2 LICENSING
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Copyright 2020, SIL International
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All rights reserved.
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This library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should also have received a copy of the GNU Lesser General Public
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License along with this library in the file named "LICENSE".
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If not, write to the Free Software Foundation, 51 Franklin Street,
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Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
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internet at http://www.fsf.org/licenses/lgpl.html.
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Alternatively, the contents of this file may be used under the terms of the
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Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
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License, as published by the Free Software Foundation, either version 2
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of the License or (at your option) any later version.
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*/
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#pragma once
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#include <cstddef>
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#include "inc/SlotBuffer.h"
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#include "inc/vector.hpp"
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namespace graphite2 {
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class Segment;
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class json;
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class ShapingContext
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{
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public:
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static constexpr size_t MAX_SLOTS=64;
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using slotref = SlotBuffer::iterator;
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using const_slotref = SlotBuffer::iterator;
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using map_t = vector<const_slotref>;
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ShapingContext(Segment & seg, uint8_t direction, size_t maxSize);
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size_t context() const;
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void reset(SlotBuffer::iterator & slot, unsigned short max_pre_context);
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void pushSlot(slotref slot);
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void collectGarbage(slotref & aSlot);
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const_slotref highwater() const;
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void highwater(const_slotref s);
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bool highpassed() const;
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void highpassed(bool v);
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int decMax();
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Segment & segment;
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json * const dbgout;
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map_t map;
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SlotBuffer in;
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uint8_t const dir;
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private:
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const_slotref _highwater;
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int _max_size;
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unsigned short _precontext;
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bool _highpassed;
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};
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inline
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size_t ShapingContext::context() const {
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return _precontext;
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}
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inline
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auto ShapingContext::highwater() const -> const_slotref {
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return _highwater;
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}
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inline
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void ShapingContext::highwater(const_slotref s) {
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_highwater = s; _highpassed = false;
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}
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inline
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bool ShapingContext::highpassed() const {
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return _highpassed;
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}
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inline
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void ShapingContext::highpassed(bool v) {
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_highpassed = v;
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}
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inline
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int ShapingContext::decMax() {
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return --_max_size;
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}
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inline
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void ShapingContext::pushSlot(slotref slot)
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{
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map.push_back(slot);
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}
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} // namespace graphite2
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