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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 232 insertions, 0 deletions

diff --git a/src/xmlpatterns/expr/qtemplate.cpp b/src/xmlpatterns/expr/qtemplate.cpp
new file mode 100644
index 0000000..79afab6
--- /dev/null
+++ b/src/xmlpatterns/expr/qtemplate.cpp
@@ -0,0 +1,232 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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 "qdynamiccontextstore_p.h"
+#include "qpatternistlocale_p.h"
+
+#include "qtemplate_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QPatternist;
+
+const SourceLocationReflection* Template::actualReflection() const
+{
+    return this;
+}
+
+DynamicContext::TemplateParameterHash Template::parametersAsHash() const
+{
+    DynamicContext::TemplateParameterHash retval;
+    const int len = templateParameters.count();
+
+    for(int i = 0; i < len; ++i)
+    {
+        const VariableDeclaration::Ptr &at = templateParameters.at(i);
+        retval.insert(at->name, at->expression());
+    }
+
+    return retval;
+}
+
+void Template::raiseXTSE0680(const ReportContext::Ptr &context,
+                             const QXmlName &name,
+                             const SourceLocationReflection *const reflection)
+{
+    context->error(QtXmlPatterns::tr("The parameter %1 is passed, but no corresponding %2 exists.")
+                                     .arg(formatKeyword(context->namePool(), name),
+                                          formatKeyword(QLatin1String("xsl:param"))),
+                   ReportContext::XTSE0680,
+                   reflection);
+}
+
+DynamicContext::Ptr Template::createContext(const TemplateInvoker *const invoker,
+                                            const DynamicContext::Ptr &context,
+                                            const bool isCallTemplate) const
+{
+    Q_ASSERT(invoker);
+    Q_ASSERT(context);
+
+    /* We have:
+     * - xsl:params in the target template (if any) which may provide
+     *   default values.
+     * - xsl:with-params in the caller (if any) which provides values.
+     *
+     * We need to, for each parameter:
+     * - If the called template provides no default value and the caller
+     *   has no value, it's an error
+     * - If the called template has a default value and the caller provides
+     *   none, it should be used
+     * - In any case the caller provides a value, it needs to be used.
+     *
+     * Problems to look out for:
+     *
+     * - Each xsl:param is in scope for the subsequent xsl:params. Hence,
+     *   the evaluation of one xsl:param can depend on another xsl:param,
+     *   and so on
+     * - The focus for xsl:params is different from the focus for
+     *   the xsl:with-params
+     * - The xsl:with-params are not in scope for the xsl:params.
+     */
+
+    WithParam::Hash withParams(invoker->withParams());
+
+    /**
+     * Parameters or not, we must in any case create a new stack frame
+     * for the template invocation since otherwise we will trash our existing
+     * variables. Hence it's as with calling user functions.
+     *
+     * This is especially reproducible with recursive functions.
+     */
+    DynamicContext::Ptr newStack(context->createStack());
+
+    /* We have no parameters, and we have no further error checking to
+     * do in the case of not being xsl:apply-templates, so we need to do nothing. */
+    if(templateParameters.isEmpty() && (!isCallTemplate || withParams.isEmpty()))
+        return newStack;
+
+    const DynamicContext::TemplateParameterHash hashedParams(parametersAsHash());
+    DynamicContext::TemplateParameterHash sewnTogether(hashedParams);
+
+    const DynamicContext::TemplateParameterHash::iterator end(sewnTogether.end());
+
+    for(DynamicContext::TemplateParameterHash::iterator it(sewnTogether.begin());
+        it != end;
+        ++it)
+    {
+        Expression::Ptr &param = it.value();
+
+        WithParam::Ptr &withParam = withParams[it.key()];
+
+        if(withParam)
+            param = Expression::Ptr(new DynamicContextStore(withParam->sourceExpression(), context));
+        else if(!param)
+        {
+            /* Ops, no xsl:with-param and no default value to cover up for it.
+             */
+            context->error(QtXmlPatterns::tr("The parameter %1 is required, but no corresponding %2 is supplied.")
+                                             .arg(formatKeyword(context->namePool(), it.key()),
+                                                  formatKeyword(QLatin1String("xsl:with-param"))),
+                           ReportContext::XTSE0690,
+                           this);
+        }
+    }
+
+    if(isCallTemplate)
+    {
+        /* Find xsl:with-param that has no corresponding xsl:param. */
+        /* Optimization: candidate for threading? */
+
+        const WithParam::Hash::const_iterator end(withParams.constEnd());
+
+        for(WithParam::Hash::const_iterator it(withParams.constBegin()); it != end; ++it)
+        {
+            if(!hashedParams.contains(it.key()))
+                raiseXTSE0680(context, it.key(), this);
+        }
+
+    }
+
+    newStack->templateParameterStore() = sewnTogether;
+    return newStack;
+}
+
+void Template::compileParameters(const StaticContext::Ptr &context)
+{
+    Q_ASSERT(context);
+
+    const int len = templateParameters.count();
+
+    for(int i = 0; i < len; ++i)
+    {
+        const VariableDeclaration::Ptr &at = templateParameters.at(i);
+
+        /* If our value is required, we don't have a default value. */
+        if(at->expression())
+        {
+            // TODO why do we pass in its own type here?
+            at->setExpression(at->expression()->typeCheck(context, at->expression()->staticType()));
+
+            at->setExpression(at->expression()->compress(context));
+        }
+    }
+}
+
+Expression::Properties Template::properties() const
+{
+    return Expression::DisableElimination; /* We're having issues with recursion detection, so this path currently loops infintely. */
+
+    Expression::Properties collect(body->properties());
+
+    VariableDeclaration::List::const_iterator end(templateParameters.constEnd());
+
+    for(VariableDeclaration::List::const_iterator it(templateParameters.constBegin());
+        it != end;
+        ++it)
+    {
+        if((*it)->expression())
+            collect |= (*it)->expression()->properties();
+    }
+
+    // TODO simplify.
+    return collect & (Expression::RequiresFocus | Expression::IsEvaluated | Expression::DisableElimination);
+}
+
+Expression::Properties Template::dependencies() const
+{
+    return Expression::DisableElimination; /* We're having issues with recursion detection, so this path currently loops infintely. */
+
+    Expression::Properties collect(body->dependencies());
+
+    VariableDeclaration::List::const_iterator end(templateParameters.constEnd());
+
+    for(VariableDeclaration::List::const_iterator it(templateParameters.constBegin());
+        it != end;
+        ++it)
+    {
+        if((*it)->expression())
+            collect |= (*it)->expression()->dependencies();
+    }
+
+    return collect & (Expression::RequiresFocus | Expression::IsEvaluated | Expression::DisableElimination);
+}
+
+QT_END_NAMESPACE