Improve script lookup caching

1 files changed, 108 insertions, 0 deletions

diff --git a/src/declarative/qml/qmlintegercache.cpp b/src/declarative/qml/qmlintegercache.cpp
new file mode 100644
index 0000000..1bc4086
--- /dev/null
+++ b/src/declarative/qml/qmlintegercache.cpp
@@ -0,0 +1,108 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qmlintegercache_p.h"
+#include <private/qmlengine_p.h>
+#include <QtDeclarative/qmlmetatype.h>
+
+QT_BEGIN_NAMESPACE
+
+QmlIntegerCache::QmlIntegerCache(QmlEngine *e)
+: engine(e)
+{
+}
+
+QmlIntegerCache::~QmlIntegerCache()
+{
+    qDeleteAll(stringCache);
+}
+
+void QmlIntegerCache::add(const QString &id, int value)
+{
+    Q_ASSERT(!stringCache.contains(id));
+
+    QmlEnginePrivate *enginePriv = QmlEnginePrivate::get(engine);
+
+    // ### use contextClass
+    QScriptDeclarativeClass::PersistentIdentifier<Data> *d = 
+        enginePriv->objectClass->createPersistentIdentifier<Data>(id);
+    d->value = value;
+
+    stringCache.insert(id, d);
+    identifierCache.insert(d->identifier, d);
+}
+
+int QmlIntegerCache::value(const QString &id)
+{
+    Data *d = stringCache.value(id);
+    return d?d->value:-1;
+}
+
+QmlIntegerCache *QmlIntegerCache::createForEnums(QmlType *type, QmlEngine *engine)
+{
+    Q_ASSERT(type);
+    Q_ASSERT(engine);
+
+    QmlIntegerCache *cache = new QmlIntegerCache(engine);
+
+    const QMetaObject *mo = type->metaObject();
+
+    for (int ii = mo->enumeratorCount() - 1; ii >= 0; --ii) {
+        QMetaEnum enumerator = mo->enumerator(ii);
+
+        for (int jj = 0; jj < enumerator.keyCount(); ++jj) {
+            QString name = QLatin1String(enumerator.key(jj));
+            int value = enumerator.value(jj);
+
+            if (!name.at(0).isUpper())
+                continue;
+
+            if (cache->stringCache.contains(name))
+                continue;
+
+            cache->add(name, value);
+        }
+    }
+
+    return cache;
+}
+
+QT_END_NAMESPACE