Long live Qt 4.5!

1 files changed, 139 insertions, 0 deletions

diff --git a/src/xmlpatterns/expr/qcurrentitemstore.cpp b/src/xmlpatterns/expr/qcurrentitemstore.cpp
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+++ b/src/xmlpatterns/expr/qcurrentitemstore.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtXmlPatterns 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 "qbuiltintypes_p.h"
+#include "qcommonsequencetypes_p.h"
+#include "qcurrentitemcontext_p.h"
+#include "qstaticcurrentcontext_p.h"
+
+#include "qcurrentitemstore_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QPatternist;
+
+CurrentItemStore::CurrentItemStore(const Expression::Ptr &operand) : SingleContainer(operand)
+{
+}
+
+DynamicContext::Ptr CurrentItemStore::createContext(const DynamicContext::Ptr &old) const
+{
+    return DynamicContext::Ptr(new CurrentItemContext(old->contextItem(), old));
+}
+
+bool CurrentItemStore::evaluateEBV(const DynamicContext::Ptr &context) const
+{
+    return m_operand->evaluateEBV(createContext(context));
+}
+
+Item::Iterator::Ptr CurrentItemStore::evaluateSequence(const DynamicContext::Ptr &context) const
+{
+    return m_operand->evaluateSequence(createContext(context));
+}
+
+Item CurrentItemStore::evaluateSingleton(const DynamicContext::Ptr &context) const
+{
+    return m_operand->evaluateSingleton(createContext(context));
+}
+
+SequenceType::Ptr CurrentItemStore::staticType() const
+{
+    return m_operand->staticType();
+}
+
+SequenceType::List CurrentItemStore::expectedOperandTypes() const
+{
+    SequenceType::List result;
+    result.append(CommonSequenceTypes::ZeroOrMoreItems);
+    return result;
+}
+
+StaticContext::Ptr CurrentItemStore::newStaticContext(const StaticContext::Ptr &context)
+{
+    /* It might be we are generated despite there is no focus. In that case
+     * an error will reported in case current() is used, but in any case we cannot
+     * crash, so use item() in case we have no focus.
+     *
+     * Such a case is when we're inside a named template, and it's invoked
+     * without focus. */
+    const ItemType::Ptr t(context->contextItemType());
+    return StaticContext::Ptr(new StaticCurrentContext(t ? t : BuiltinTypes::item, context));
+}
+
+Expression::Ptr CurrentItemStore::compress(const StaticContext::Ptr &context)
+{
+    const Expression::Ptr me(SingleContainer::compress(newStaticContext(context)));
+
+    if(me != this)
+        return me;
+    else
+    {
+        /* If fn:current() isn't called, there's no point in us sticking
+         * around. */
+        if(m_operand->deepProperties().testFlag(RequiresCurrentItem))
+            return me;
+        else
+            return m_operand;
+    }
+}
+
+Expression::Ptr CurrentItemStore::typeCheck(const StaticContext::Ptr &context,
+                                            const SequenceType::Ptr &reqType)
+{
+    return SingleContainer::typeCheck(newStaticContext(context), reqType);
+}
+
+ExpressionVisitorResult::Ptr CurrentItemStore::accept(const ExpressionVisitor::Ptr &visitor) const
+{
+    return visitor->visit(this);
+}
+
+const SourceLocationReflection *CurrentItemStore::actualReflection() const
+{
+    return m_operand->actualReflection();
+}
+
+Expression::Properties CurrentItemStore::properties() const
+{
+    return m_operand->properties() & (RequiresFocus | IsEvaluated | DisableElimination);
+}
+
+QT_END_NAMESPACE