3rdparty/openwnn: Fix and optimize the engine due to QStringLiteral

QStringLiteral is broken in MSVC2015 onwards when used with \uXXXX
encoded character literals. This was the reason Japanese tests were
failing - the OpenWNN engine was actually broken and producing
garbage.

Not only this change eliminates QStringLiteral from openwnn, but also
reduces runtime memory usage by replacing QMap<QString, QString>.

The new solution is based on simple binary lookup table WnnLookupTable.
WnnLookupTable data was converted from existing QMap structures using
WnnLookupTable::create() method, which was left there for future
reference.

This change also removes the unnecessary QObjectPrivate definitions
from Romkan* classes.

[ChangeLog][OpenWNN] Fixed and optimized OpenWNN engine (as a workaround
for QStringLiteral breakage)

Task-number: QTBUG-62133
Change-Id: I50c9e2f5c363e1314f47d7023685da543ec9a7eb
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
(cherry picked from commit 0bf1c6ad9e0b5572b8ea99f5fc8945dade5675b7)

1 files changed, 47 insertions, 0 deletions

diff --git a/src/virtualkeyboard/3rdparty/openwnn/wnnEngine/include/wnnlookuptable.h b/src/virtualkeyboard/3rdparty/openwnn/wnnEngine/include/wnnlookuptable.h
new file mode 100644
index 00000000..49d88208
--- /dev/null
+++ b/src/virtualkeyboard/3rdparty/openwnn/wnnEngine/include/wnnlookuptable.h
@@ -0,0 +1,47 @@
+/*
+ * Qt implementation of OpenWnn library
+ * This file is part of the Qt Virtual Keyboard module.
+ * Contact: http://www.qt.io/licensing/
+ *
+ * Copyright (C) 2017  The Qt Company
+ *
+ * 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.
+ */
+
+#ifndef WNNLOOKUPTABLE_H
+#define WNNLOOKUPTABLE_H
+
+#include <QString>
+#if WNN_LOOKUP_TABLE_CREATE
+#include <QMap>
+#endif
+
+class WnnLookupTable
+{
+public:
+    explicit WnnLookupTable(const char **keys, const char **values, const int length);
+
+    const QString value(const QString &what) const;
+    inline const QString operator[](const QString &what) const { return value(what); }
+
+#if WNN_LOOKUP_TABLE_CREATE
+    static void create(const QMap<QString, QString> &map, const QString &privatePrefix, const QString &fileName);
+#endif
+
+private:
+    const char **keys;
+    const char **values;
+    const int length;
+};
+
+#endif // WNNLOOKUPTABLE_H