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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Virtual Keyboard module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "pinyindecoderservice_p.h"
#include "pinyinime.h"
#include "dictdef.h"
#include <QStandardPaths>
#include <QFileInfo>
#include <QDir>
#include <QtCore/QLibraryInfo>
#include <QLoggingCategory>
QT_BEGIN_NAMESPACE
namespace QtVirtualKeyboard {
Q_DECLARE_LOGGING_CATEGORY(lcPinyin)
using namespace ime_pinyin;
QScopedPointer<PinyinDecoderService> PinyinDecoderService::_instance;
/*!
\class QtVirtualKeyboard::PinyinDecoderService
\internal
*/
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 nullptr;
return _instance.data();
}
bool PinyinDecoderService::init()
{
if (initDone)
return true;
QString sysDict(qEnvironmentVariable("QT_VIRTUALKEYBOARD_PINYIN_DICTIONARY"));
if (!QFileInfo::exists(sysDict)) {
sysDict = QLatin1String(":///QtQuick/VirtualKeyboard/3rdparty/pinyin/data/dict_pinyin.dat");
if (!QFileInfo::exists(sysDict))
sysDict = QLibraryInfo::location(QLibraryInfo::DataPath) + QLatin1String("/qtvirtualkeyboard/pinyin/dict_pinyin.dat");
}
QString usrDictPath = QStandardPaths::writableLocation(QStandardPaths::ConfigLocation);
QFileInfo usrDictInfo(usrDictPath + QLatin1String("/qtvirtualkeyboard/pinyin/usr_dict.dat"));
if (!usrDictInfo.exists()) {
qCWarning(lcPinyin) << "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)
qCWarning(lcPinyin) << "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 + QLatin1String("/qtvirtualkeyboard/pinyin/usr_dict.dat"));
im_init_user_dictionary(usrDictInfo.absoluteFilePath().toUtf8().constData());
} else {
im_init_user_dictionary(nullptr);
}
}
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, (int)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 (int)py_len;
}
QVector<int> PinyinDecoderService::spellingStartPositions()
{
const unsigned short *spl_start;
int len;
// There will be len + 1 elements in the buffer when len > 0.
len = (int)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 (int 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 (int)im_get_fixed_len();
}
void PinyinDecoderService::flushCache()
{
im_flush_cache();
}
QList<QString> PinyinDecoderService::predictionList(const QString &history)
{
QList<QString> predictList;
char16 (*predictItems)[kMaxPredictSize + 1] = nullptr;
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;
}
} // namespace QtVirtualKeyboard
QT_END_NAMESPACE
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