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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://www.qt.io
**
** This file is part of the Qt Virtual Keyboard add-on for Qt Enterprise.
**
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://www.qt.io
**
****************************************************************************/
#include "pinyindecoderservice.h"
#include "pinyinime.h"
#include "dictdef.h"
#include <QStandardPaths>
#include <QFileInfo>
#include <QDir>
#include "virtualkeyboarddebug.h"
using namespace ime_pinyin;
QScopedPointer<PinyinDecoderService> PinyinDecoderService::_instance;
PinyinDecoderService::PinyinDecoderService(QObject *parent) :
QObject(parent),
initDone(false)
{
}
PinyinDecoderService::~PinyinDecoderService()
{
if (initDone) {
im_close_decoder();
initDone = false;
}
}
PinyinDecoderService *PinyinDecoderService::getInstance()
{
if (!_instance)
_instance.reset(new PinyinDecoderService());
if (!_instance->init())
return 0;
return _instance.data();
}
bool PinyinDecoderService::init()
{
if (initDone)
return true;
QString sysDict(QString::fromLatin1(qgetenv("QT_VIRTUALKEYBOARD_PINYIN_DICTIONARY").constData()));
if (sysDict.isEmpty())
sysDict = QT_VIRTUALKEYBOARD_PINYIN_DICTIONARY;
QString usrDictPath = QStandardPaths::writableLocation(QStandardPaths::ConfigLocation);
QFileInfo usrDictInfo(usrDictPath + "/qtvirtualkeyboard/pinyin/usr_dict.dat");
if (!usrDictInfo.exists()) {
VIRTUALKEYBOARD_DEBUG() << "PinyinDecoderService::init(): creating directory for user dictionary" << usrDictInfo.absolutePath();
QDir().mkpath(usrDictInfo.absolutePath());
}
initDone = im_open_decoder(sysDict.toUtf8().constData(), usrDictInfo.absoluteFilePath().toUtf8().constData());
if (!initDone)
VIRTUALKEYBOARD_DEBUG() << "Could not initialize pinyin engine. sys_dict:" << sysDict << "usr_dict:" << usrDictInfo.absoluteFilePath();
return initDone;
}
void PinyinDecoderService::setUserDictionary(bool enabled)
{
if (enabled == im_is_user_dictionary_enabled())
return;
if (enabled) {
QString usrDictPath = QStandardPaths::writableLocation(QStandardPaths::ConfigLocation);
QFileInfo usrDictInfo(usrDictPath + "/qtvirtualkeyboard/pinyin/usr_dict.dat");
im_init_user_dictionary(usrDictInfo.absoluteFilePath().toUtf8().constData());
} else {
im_init_user_dictionary(NULL);
}
}
bool PinyinDecoderService::isUserDictionaryEnabled() const
{
return im_is_user_dictionary_enabled();
}
void PinyinDecoderService::setLimits(int maxSpsLen, int maxHzsLen)
{
if (maxSpsLen <= 0)
maxSpsLen = kMaxSearchSteps - 1;
if (maxHzsLen <= 0)
maxHzsLen = kMaxSearchSteps;
im_set_max_lens(size_t(maxSpsLen), size_t(maxHzsLen));
}
int PinyinDecoderService::search(const QString &spelling)
{
QByteArray spellingBuf = spelling.toLatin1();
return int(im_search(spellingBuf.constData(), spellingBuf.length()));
}
int PinyinDecoderService::deleteSearch(int pos, bool isPosInSpellingId, bool clearFixedInThisStep)
{
if (pos <= 0)
pos = 0;
return int(im_delsearch(size_t(pos), isPosInSpellingId, clearFixedInThisStep));
}
void PinyinDecoderService::resetSearch()
{
im_reset_search();
}
QString PinyinDecoderService::pinyinString(bool decoded)
{
size_t py_len;
const char *py = im_get_sps_str(&py_len);
if (!decoded)
py_len = strlen(py);
return QString(QLatin1String(py, py_len));
}
int PinyinDecoderService::pinyinStringLength(bool decoded)
{
size_t py_len;
const char *py = im_get_sps_str(&py_len);
if (!decoded)
py_len = strlen(py);
return py_len;
}
QVector<int> PinyinDecoderService::spellingStartPositions()
{
const unsigned short *spl_start;
size_t len;
// There will be len + 1 elements in the buffer when len > 0.
len = im_get_spl_start_pos(spl_start);
QVector<int> arr;
arr.resize(len + 2);
arr[0] = len; // element 0 is used to store the length of buffer.
for (size_t i = 0; i <= len; i++)
arr[i + 1] = spl_start[i];
return arr;
}
QString PinyinDecoderService::candidateAt(int index)
{
Q_ASSERT(index >= 0);
QVector<QChar> candidateBuf;
candidateBuf.resize(kMaxSearchSteps + 1);
if (!im_get_candidate(size_t(index), (char16 *)candidateBuf.data(), candidateBuf.length() - 1))
return QString();
candidateBuf.last() = 0;
return QString(candidateBuf.data());
}
QList<QString> PinyinDecoderService::fetchCandidates(int index, int count, int sentFixedLen)
{
QList<QString> candidatesList;
for (int i = index; i < index + count; i++) {
QString retStr = candidateAt(i);
if (0 == i)
retStr.remove(0, sentFixedLen);
candidatesList.append(retStr);
}
return candidatesList;
}
int PinyinDecoderService::chooceCandidate(int index)
{
return int(im_choose(index));
}
int PinyinDecoderService::cancelLastChoice()
{
return int(im_cancel_last_choice());
}
int PinyinDecoderService::fixedLength()
{
return im_get_fixed_len();
}
void PinyinDecoderService::flushCache()
{
im_flush_cache();
}
QList<QString> PinyinDecoderService::predictionList(const QString &history)
{
QList<QString> predictList;
char16 (*predictItems)[kMaxPredictSize + 1] = 0;
int predictNum = int(im_get_predicts(history.utf16(), predictItems));
predictList.reserve(predictNum);
for (int i = 0; i < predictNum; i++)
predictList.append(QString((QChar *)predictItems[i]));
return predictList;
}
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