author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 04 Oct 2010 00:38:12 +0300 | |
changeset 30 | 80e4d18b72f5 |
parent 6 | c3690ec91ef8 |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (developer.feedback@nokia.com) |
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** |
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** This file is part of the HbCore module of the UI Extensions for Mobile. |
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** |
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** GNU Lesser General Public License Usage |
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** This file may be used under the terms of the GNU Lesser General Public |
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** License version 2.1 as published by the Free Software Foundation and |
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** appearing in the file LICENSE.LGPL included in the packaging of this file. |
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** Please review the following information to ensure the GNU Lesser General |
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** Public License version 2.1 requirements will be met: |
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at developer.feedback@nokia.com. |
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** |
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****************************************************************************/ |
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#include "hbinputpredictionfactory.h" |
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#include <QLocale> |
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#include <QPluginLoader> |
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#include <QDir> |
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#include <QLibrary> |
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#include <QMutex> |
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#include <QMutexLocker> |
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#include <QApplication> |
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#include <QList> |
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#include "hbinputsettingproxy.h" |
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#include "hbinputpredictionengine.h" |
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/*! |
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@stable |
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@hbcore |
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\class HbPredictionFactory |
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\brief A factory class for prediction engine abstractation layer. |
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A singleton factory class, which knows how to list and instantiate available input engine implementations. |
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\sa HbPredictionBase |
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\sa HbPredictionEngine |
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\sa HbPredictionEngineChinese |
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*/ |
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/// @cond |
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class HbEngineData |
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{ |
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public: |
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HbEngineData() |
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: cachedInstance(0) { |
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} |
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~HbEngineData() { |
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delete cachedInstance; |
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} |
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public: |
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QList<HbInputLanguage> languages; |
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HbPredictionInterfaceType type; |
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int handle; |
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HbPredictionEngine *cachedInstance; |
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QString filename; |
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QString vendorId; |
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}; |
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class HbPredictionFactoryPrivate |
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{ |
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public: |
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HbPredictionFactoryPrivate() : leadingHandle(0) {} |
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~HbPredictionFactoryPrivate(); |
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void initialize(); |
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HbPredictionEngine *predictionEngineForLanguage(const HbInputLanguage &language); |
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void clearEngineData(); |
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HbPredictionEngine *createInstance(int index); |
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int newHandle() { |
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return ++leadingHandle; |
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} |
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public: |
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QList<HbPredictionPlugin *> activePlugins; |
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QList<HbEngineData> engines; |
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int leadingHandle; |
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QMutex mutex; |
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}; |
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HbPredictionFactoryPrivate::~HbPredictionFactoryPrivate() |
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{ |
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clearEngineData(); |
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for (int j = 0; j < activePlugins.count(); j++) { |
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delete activePlugins[j]; |
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} |
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activePlugins.clear(); |
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} |
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void HbPredictionFactoryPrivate::initialize() |
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{ |
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|
106 |
clearEngineData(); |
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|
107 |
for (int j = 0; j < activePlugins.count(); j++) { |
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|
108 |
delete activePlugins[j]; |
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109 |
} |
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110 |
activePlugins.clear(); |
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|
111 |
|
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QStringList pathList = HbInputSettingProxy::predictionEnginePaths(); |
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|
113 |
|
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114 |
for (int kk = 0; kk < pathList.count(); kk++) { |
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QDir dir(pathList[kk]); |
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116 |
|
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for (unsigned int i = 0; i < dir.count(); i++) { |
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QString fileName = dir[i]; |
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119 |
|
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if (!QLibrary::isLibrary(dir[i])) { |
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121 |
continue; |
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122 |
} |
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123 |
|
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QPluginLoader loader(dir.absoluteFilePath(fileName)); |
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QObject *engine_base = loader.instance(); |
0
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126 |
if (engine_base) { |
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HbPredictionPlugin *plugin = qobject_cast<HbPredictionPlugin *>(engine_base); |
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128 |
if (plugin) { |
0
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129 |
HbEngineData data; |
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data.languages = plugin->languages(); |
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data.type = plugin->type(); |
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data.handle = newHandle(); |
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data.filename = fileName; |
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data.vendorId = plugin->vendorId(); |
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135 |
engines.append(data); |
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136 |
delete plugin; |
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137 |
} else { |
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|
138 |
qDebug("HbPredictionFactory::Initialize qobject_cast failed, probably loading ime plugin."); |
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139 |
} |
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140 |
} else { |
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141 |
qDebug("HbPredictionFactory: Unable to create found plugin instance!"); |
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142 |
} |
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143 |
} |
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144 |
} |
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145 |
} |
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|
146 |
|
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147 |
void HbPredictionFactoryPrivate::clearEngineData() |
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148 |
{ |
0
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149 |
engines.clear(); |
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150 |
} |
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|
151 |
|
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152 |
HbPredictionEngine *HbPredictionFactoryPrivate::predictionEngineForLanguage(const HbInputLanguage &language) |
0
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153 |
{ |
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154 |
bool anyVariant = (language.variant() == QLocale::AnyCountry); |
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155 |
for (int i = 0; i < engines.count(); ++i) { |
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|
156 |
for (int j = 0; j < engines[i].languages.count(); ++j) { |
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|
157 |
if ((engines[i].type & HbPredInterfaceHidden) == 0) { // Include only those that are not hidden. |
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|
158 |
bool checkLangOnly = (anyVariant || (engines[i].languages[j].variant() == QLocale::AnyCountry)); |
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|
159 |
if ((checkLangOnly && (engines[i].languages[j].language() == language.language())) |
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|
160 |
|| engines[i].languages[j] == language) { |
0
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|
161 |
return createInstance(i); |
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|
162 |
} |
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|
163 |
} |
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|
164 |
} |
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|
165 |
} |
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|
166 |
|
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|
167 |
return 0; |
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|
168 |
} |
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|
169 |
|
6
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|
170 |
HbPredictionEngine *HbPredictionFactoryPrivate::createInstance(int index) |
0
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|
171 |
{ |
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|
172 |
if (index < engines.count()) { |
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|
173 |
if (engines[index].cachedInstance) { |
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|
174 |
return engines[index].cachedInstance; |
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|
175 |
} |
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|
176 |
|
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|
177 |
QStringList pathList = HbInputSettingProxy::predictionEnginePaths(); |
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|
178 |
|
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|
179 |
for (int kk = 0; kk < pathList.count(); kk++) { |
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|
180 |
QString fullName = pathList[kk]; |
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|
181 |
fullName += QDir::separator(); |
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|
182 |
fullName += engines[index].filename; |
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|
183 |
QPluginLoader loader(fullName); |
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|
184 |
|
6
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|
185 |
QObject *plugin_base = loader.instance(); |
0
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|
186 |
if (plugin_base) { |
6
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|
187 |
HbPredictionPlugin *plugin = qobject_cast<HbPredictionPlugin *>(plugin_base); |
0
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|
188 |
if (plugin) { |
6
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|
189 |
HbPredictionEngine *newEngine = plugin->createInterface(); |
0
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|
190 |
if (newEngine) { |
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|
191 |
engines[index].cachedInstance = newEngine; |
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|
192 |
activePlugins.append(plugin); |
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|
193 |
return newEngine; |
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|
194 |
} |
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|
195 |
} |
0
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|
196 |
} |
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|
197 |
} |
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|
198 |
} |
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|
199 |
|
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|
200 |
return 0; |
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diff
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|
201 |
} |
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|
202 |
|
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|
203 |
/// @endcond |
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|
204 |
|
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|
205 |
/*! |
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|
206 |
Returns reference to singleton object. |
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|
207 |
*/ |
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|
208 |
HbPredictionFactory *HbPredictionFactory::instance() |
0
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|
209 |
{ |
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static HbPredictionFactory myInstance; |
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return &myInstance; |
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} |
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/*! |
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Constructs the object. |
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*/ |
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HbPredictionFactory::HbPredictionFactory() |
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{ |
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d = new HbPredictionFactoryPrivate(); |
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d->initialize(); |
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} |
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/*! |
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Destructs the object. |
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*/ |
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HbPredictionFactory::~HbPredictionFactory() |
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{ |
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} |
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|
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/*! |
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Returns prediction engine capable of handling given language. Returns 0 if |
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not found. Engine is instantiated and cached. This method returns |
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the first suitable prediction engine it finds for given |
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language. There may be also others available. |
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\sa allPredictionEnginesForLanguage |
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\sa allPredictionEngines |
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*/ |
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HbPredictionEngine *HbPredictionFactory::predictionEngineForLanguage(const HbInputLanguage &language) |
0
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{ |
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QMutexLocker locker(&d->mutex); |
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return d->predictionEngineForLanguage(language); |
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} |
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|
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/*! |
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Clears engine cache and frees all the resources. |
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\sa initialize |
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*/ |
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void HbPredictionFactory::clearEngineData() |
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{ |
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QMutexLocker locker(&d->mutex); |
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d->clearEngineData(); |
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} |
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void HbPredictionFactory::shutDown() |
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{ |
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delete d; |
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d = 0; |
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} |
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|
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/*! |
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Initializes and fills cache. This is done automatically when a factory instance is |
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created. Can be called again to refresh the list. |
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|
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\sa clearEngineData |
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*/ |
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void HbPredictionFactory::initialize() |
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{ |
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// No mutex here, clearEngineData does that. |
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// clearEngineData(); |
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|
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QMutexLocker locker(&d->mutex); |
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d->initialize(); |
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} |
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|
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/*! |
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Returns all available prediction engines for given language. The returned list contains handles |
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which can then be used for instantiating listed engines. |
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|
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\sa createEngine |
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\sa allPredictionEngines |
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*/ |
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QList<int> HbPredictionFactory::allPredictionEnginesForLanguage(const HbInputLanguage &language) |
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{ |
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QMutexLocker locker(&d->mutex); |
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|
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QList<int> results; |
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|
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for (int i = 0; i < d->engines.count(); ++i) { |
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for (int j = 0; j < d->engines[i].languages.count(); ++j) { |
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if ((d->engines[i].type & HbPredInterfaceHidden) == 0) { |
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if (d->engines[i].languages[j] == language) { |
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results << d->engines[i].handle; |
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} |
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} |
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} |
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} |
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return QList<int>(results); |
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} |
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|
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/*! |
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Returns all available prediction engines. The returned list contains handles |
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which can then be used for instantiating returned engines. |
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|
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\sa createEngine |
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\sa allPredictionEnginesForLanguage |
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*/ |
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QList<int> HbPredictionFactory::allPredictionEngines() |
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{ |
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QMutexLocker locker(&d->mutex); |
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|
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QList<int> results; |
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for (int i = 0; i < d->engines.count(); ++i) { |
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if ((d->engines[i].type & HbPredInterfaceHidden) == 0) { |
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results << d->engines[i].handle; |
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} |
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} |
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|
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return QList<int>(results); |
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} |
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|
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/*! |
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Creates and caches an instance of given language. |
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|
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\sa allPredictionEnginesForLanguage |
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\sa allPredictionEngines |
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*/ |
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HbPredictionEngine *HbPredictionFactory::createEngine(int handle) |
0
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{ |
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QMutexLocker locker(&d->mutex); |
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|
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for (int i = 0; i < d->engines.count(); ++i) { |
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if (d->engines[i].handle == handle) { |
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return d->createInstance(i); |
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} |
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} |
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|
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return 0; |
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} |
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|
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/*! |
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Creates and caches an instance of known prediction engine. Parameter vendorIdString is matched |
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to HbPredictionPlugin::VendorId() string. |
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|
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\sa allPredictionEnginesForLanguage |
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\sa allPredictionEngines |
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\sa HbPredictionEngine |
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\sa HbPredictionPlugin |
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*/ |
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HbPredictionEngine *HbPredictionFactory::createEngine(const QString &vendorIdString) |
0
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{ |
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QMutexLocker locker(&d->mutex); |
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|
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for (int i = 0; i < d->engines.count(); ++i) { |
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if (d->engines[i].vendorId == vendorIdString) { |
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return d->createInstance(i); |
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} |
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} |
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|
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return 0; |
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} |
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|
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// End of file |