1 files changed, 211 insertions, 0 deletions
diff --git a/src/xmlpatterns/expr/qapplytemplate.cpp b/src/xmlpatterns/expr/qapplytemplate.cpp
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+++ b/src/xmlpatterns/expr/qapplytemplate.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 <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);
+        }
+        else
+            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