--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xmlpatterns/expr/qapplytemplate.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,210 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtDebug>
+
+#include "qaxisstep_p.h"
+#include "qcommonsequencetypes_p.h"
+#include "qcommonvalues_p.h"
+#include "qitemmappingiterator_p.h"
+#include "qsequencemappingiterator_p.h"
+#include "qpatternistlocale_p.h"
+
+#include "qapplytemplate_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QPatternist;
+
+ApplyTemplate::ApplyTemplate(const TemplateMode::Ptr &mode,
+ const WithParam::Hash &withParams,
+ const TemplateMode::Ptr &defaultMode) : TemplateInvoker(withParams)
+ , m_mode(mode)
+ , m_defaultMode(defaultMode)
+{
+ Q_ASSERT_X(m_mode || m_defaultMode, Q_FUNC_INFO,
+ "Either a mode, or the default mode must be supplied.");
+}
+
+Item ApplyTemplate::mapToItem(const QXmlNodeModelIndex &node,
+ const DynamicContext::Ptr &) const
+{
+ return Item(node);
+}
+
+Item::Iterator::Ptr ApplyTemplate::mapToSequence(const Item &item,
+ const DynamicContext::Ptr &context) const
+{
+ Q_UNUSED(item);
+ return evaluateSequence(context);
+}
+
+TemplateMode::Ptr ApplyTemplate::effectiveMode(const DynamicContext::Ptr &context) const
+{
+ if(m_mode)
+ return m_mode;
+ else
+ {
+ const TemplateMode::Ptr currentMode(context->currentTemplateMode());
+
+ if(currentMode)
+ return currentMode;
+ else
+ return m_defaultMode;
+ }
+}
+
+Template::Ptr ApplyTemplate::findTemplate(const DynamicContext::Ptr &context,
+ const TemplateMode::Ptr &templateMode) const
+{
+ const int count = templateMode->templatePatterns.count();
+ Template::Ptr result;
+ /* It's redundant to initialize these values, but it suppresses false
+ * positives with GCC. */
+ PatternPriority priority = 0;
+ TemplatePattern::ID id = -1;
+
+ /* Possible optimization: detecting ambiguous rule matches could be forked off to a
+ * low prioirity thread. */
+ for(int i = 0; i < count; ++i)
+ {
+ const TemplatePattern::Ptr &candidate = templateMode->templatePatterns.at(i);
+ if(candidate->matchPattern()->evaluateEBV(context))
+ {
+ if(result)
+ {
+ if( candidate->id() != id
+ && candidate->priority() == priority
+ && candidate->templateTarget()->importPrecedence ==
+ result->importPrecedence)
+ {
+ context->error(QtXmlPatterns::tr("Ambiguous rule match."),
+ ReportContext::XTRE0540, this);
+ }
+ else
+ break;
+ }
+ else
+ {
+ result = candidate->templateTarget();
+ priority = candidate->priority();
+ id = candidate->id();
+ }
+ }
+ }
+
+ return result;
+}
+
+Item::Iterator::Ptr ApplyTemplate::evaluateSequence(const DynamicContext::Ptr &context) const
+{
+ const TemplateMode::Ptr templateMode(effectiveMode(context));
+ const Template::Ptr &templateMatch = findTemplate(context, templateMode);
+
+ if(templateMatch)
+ return templateMatch->body->evaluateSequence(templateMatch->createContext(this, context, false));
+ else
+ {
+ /* None of our templates matched. Proceed with a built-in. */
+ const Item current(context->contextItem());
+ // TODO it can be an atomic value?
+ const QXmlNodeModelIndex::NodeKind kind(current.asNode().kind());
+
+ if(kind == QXmlNodeModelIndex::Element || kind == QXmlNodeModelIndex::Document)
+ {
+ pDebug() << "No template match, using builtin template for element() | document-node()";
+
+ const Item::Iterator::Ptr focusIterator(makeItemMappingIterator<Item>(ConstPtr(this),
+ current.asNode().iterate(QXmlNodeModelIndex::AxisChild),
+ context));
+
+ const DynamicContext::Ptr focus(context->createFocus());
+ focus->setFocusIterator(focusIterator);
+ return makeSequenceMappingIterator<Item>(ConstPtr(this), focusIterator, focus);
+ }
+ return CommonValues::emptyIterator;
+ }
+}
+
+Expression::Ptr ApplyTemplate::compress(const StaticContext::Ptr &context)
+{
+ /* If we have a mode, we will never need the default mode. */
+ if(m_mode)
+ m_defaultMode.reset();
+
+ return TemplateInvoker::compress(context);
+}
+
+SequenceType::Ptr ApplyTemplate::staticType() const
+{
+ return CommonSequenceTypes::ZeroOrMoreItems;
+}
+
+ExpressionVisitorResult::Ptr ApplyTemplate::accept(const ExpressionVisitor::Ptr &visitor) const
+{
+ return visitor->visit(this);
+}
+
+Expression::Properties ApplyTemplate::properties() const
+{
+ return RequiresFocus | DisableElimination;
+}
+
+bool ApplyTemplate::configureRecursion(const CallTargetDescription::Ptr &sign)
+{
+ Q_ASSERT_X(false, Q_FUNC_INFO, "We're not expected to be called.");
+ Q_UNUSED(sign);
+ return false;
+}
+
+Expression::Ptr ApplyTemplate::body() const
+{
+ Q_ASSERT_X(false, Q_FUNC_INFO, "We're not expected to be called.");
+ return Expression::Ptr();
+}
+
+CallTargetDescription::Ptr ApplyTemplate::callTargetDescription() const
+{
+ Q_ASSERT_X(false, Q_FUNC_INFO, "We're not expected to be called.");
+ return CallTargetDescription::Ptr();
+}
+
+QT_END_NAMESPACE