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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 "cangjietable.h"
using namespace tcime;
const int CangjieTable::BASE_NUMBER = 26;
const int CangjieTable::MAX_CODE_LENGTH = 5;
const int CangjieTable::MAX_SIMPLIFIED_CODE_LENGTH = 2;
const QMap<QChar, int> &CangjieTable::letters()
{
static QMap<QChar, int> letters;
if (letters.isEmpty()) {
int i = 1;
letters.insert(0x65e5, i++);
letters.insert(0x6708, i++);
letters.insert(0x91d1, i++);
letters.insert(0x6728, i++);
letters.insert(0x6c34, i++);
letters.insert(0x706b, i++);
letters.insert(0x571f, i++);
letters.insert(0x7af9, i++);
letters.insert(0x6208, i++);
letters.insert(0x5341, i++);
letters.insert(0x5927, i++);
letters.insert(0x4e2d, i++);
letters.insert(0x4e00, i++);
letters.insert(0x5f13, i++);
letters.insert(0x4eba, i++);
letters.insert(0x5fc3, i++);
letters.insert(0x624b, i++);
letters.insert(0x53e3, i++);
letters.insert(0x5c38, i++);
letters.insert(0x5eff, i++);
letters.insert(0x5c71, i++);
letters.insert(0x5973, i++);
letters.insert(0x7530, i++);
letters.insert(0x96e3, i++);
letters.insert(0x535c, i++);
}
return letters;
}
bool CangjieTable::isLetter(const QChar &c)
{
static const QMap<QChar, int> &letters = CangjieTable::letters();
return letters.contains(c);
}
int CangjieTable::getPrimaryIndex(const QString &code)
{
static const QMap<QChar, int> &letters = CangjieTable::letters();
int length = code.length();
if ((length < 1) || (length > MAX_CODE_LENGTH))
return -1;
QChar c = code.at(0);
if (!isLetter(c))
return -1;
// The first letter cannot be absent in the code; therefore, the numerical
// index of the first letter starts from 0 instead.
int index = (letters[c] - 1) * BASE_NUMBER;
if (length < 2)
return index;
c = code.at(length - 1);
if (!isLetter(c))
return -1;
return index + letters[c];
}
int CangjieTable::getSecondaryIndex(const QString &code)
{
static const QMap<QChar, int> &letters = CangjieTable::letters();
int index = 0;
int last = code.length() - 1;
for (int i = 1; i < last; i++) {
QChar c = code.at(i);
if (!isLetter(c))
return -1;
index = index * BASE_NUMBER + letters[c];
}
int maxEnd = MAX_CODE_LENGTH - 1;
for (int i = last; i < maxEnd; i++)
index = index * BASE_NUMBER;
return index;
}
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