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/*
* Qt implementation of TCIME library
* This file is part of the Qt Virtual Keyboard module.
* Contact: http://www.qt.io/licensing/
*
* Copyright (C) 2015 The Qt Company
* Copyright 2010 Google Inc.
*
* Licensed 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "zhuyintable.h"
#include <QStringList>
using namespace tcime;
const int ZhuyinTable::INITIALS_SIZE = 22;
const QList<QChar> ZhuyinTable::yiEndingFinals = QList<QChar>()
<< 0x311a << 0x311b << 0x311d << 0x311e << 0x3120 << 0x3121 << 0x3122
<< 0x3123 << 0x3124 << 0x3125;
const QList<QChar> ZhuyinTable::wuEndingFinals = QList<QChar>()
<< 0x311a << 0x311b << 0x311e << 0x311f << 0x3122 << 0x3123 << 0x3124
<< 0x3125;
const QList<QChar> ZhuyinTable::yuEndingFinals = QList<QChar>()
<< 0x311d << 0x3122 << 0x3123 << 0x3125;
const int ZhuyinTable::YI_FINALS_INDEX = 14;
const int ZhuyinTable::WU_FINALS_INDEX = 25;
const int ZhuyinTable::YU_FINALS_INDEX = 34;
const QChar ZhuyinTable::YI_FINALS = 0x3127;
const QChar ZhuyinTable::WU_FINALS = 0x3128;
const QChar ZhuyinTable::YU_FINALS = 0x3129;
const QList<QChar> ZhuyinTable::tones = QList<QChar>()
<< ZhuyinTable::DEFAULT_TONE << 0x02d9 << 0x02ca << 0x02c7 << 0x02cb;
const QChar ZhuyinTable::DEFAULT_TONE = QLatin1Char(' ');
int ZhuyinTable::getInitials(const QChar &initials)
{
// Calculate the index by its distance to the first initials 'ㄅ' (b).
int index = initials.unicode() - 0x3105 + 1;
if (index >= ZhuyinTable::INITIALS_SIZE)
// Syllables starting with finals can still be valid.
return 0;
return (index >= 0) ? index : -1;
}
int ZhuyinTable::getFinals(const QString &finals)
{
if (finals.length() == 0)
// Syllables ending with no finals can still be valid.
return 0;
if (finals.length() > 2)
return -1;
// Compute the index instead of direct lookup the whole array to save
// traversing time. First calculate the distance to the first finals
// 'ㄚ' (a).
const QChar firstFinal = finals.at(0);
int index = firstFinal.unicode() - 0x311a + 1;
if (index < YI_FINALS_INDEX)
return index;
// Check 'ㄧ' (yi), 'ㄨ' (wu) , and 'ㄩ' (yu) group finals.
QList<QChar> endingFinals;
if (firstFinal == YI_FINALS) {
index = YI_FINALS_INDEX;
endingFinals = yiEndingFinals;
} else if (firstFinal == WU_FINALS) {
index = WU_FINALS_INDEX;
endingFinals = wuEndingFinals;
} else if (firstFinal == YU_FINALS) {
index = YU_FINALS_INDEX;
endingFinals = yuEndingFinals;
} else {
return -1;
}
if (finals.length() == 1)
return index;
for (int i = 0; i < endingFinals.size(); ++i) {
if (finals.at(1) == endingFinals[i])
return index + i + 1;
}
return -1;
}
int ZhuyinTable::getSyllablesIndex(const QString &syllables)
{
if (syllables.isEmpty())
return -1;
int initials = getInitials(syllables.at(0));
if (initials < 0)
return -1;
// Strip out initials before getting finals column-index.
int finals = getFinals((initials != 0) ? syllables.mid(1) : syllables);
if (finals < 0)
return -1;
return (finals * INITIALS_SIZE + initials);
}
int ZhuyinTable::getTones(const QChar &c)
{
for (int i = 0; i < tones.size(); ++i) {
if (tones[i] == c)
return i;
}
// Treat all other characters as the default tone with the index 0.
return 0;
}
int ZhuyinTable::getTonesCount()
{
return tones.size();
}
bool ZhuyinTable::isTone(const QChar &c)
{
for (int i = 0; i < tones.size(); ++i) {
if (tones[i] == c)
return true;
}
return false;
}
bool ZhuyinTable::isYiWuYuFinals(const QChar &c)
{
ushort unicode = c.unicode();
return unicode == YI_FINALS || unicode == WU_FINALS || unicode == YU_FINALS;
}
QStringList ZhuyinTable::stripTones(const QString &input)
{
const int last = input.length() - 1;
if (last < 0)
return QStringList();
QChar tone = input.at(last);
if (isTone(tone)) {
QString syllables = input.left(last);
if (syllables.length() <= 0)
return QStringList();
return QStringList() << syllables << QString(tone);
}
// Treat the tone-less input as the default tone (tone-0).
return QStringList() << input << QString(DEFAULT_TONE);
}
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