Long live Qt 4.5!

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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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+
+#ifndef Patternist_StaticContext_H
+#define Patternist_StaticContext_H
+
+#include "qexternalvariableloader_p.h"
+#include "qitemtype_p.h"
+#include "qnamepool_p.h"
+#include "qnamespaceresolver_p.h"
+#include "qreportcontext_p.h"
+#include "qresourceloader_p.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+class QUrl;
+template<typename Key, typename T> class QHash;
+
+namespace QPatternist
+{
+    class DynamicContext;
+    class Expression;
+    class FunctionFactory;
+    class SchemaTypeFactory;
+
+    /**
+     * @short Carries information and facilities used at compilation time.
+     *
+     * A representation of the Static Context in XPath 2.0. The Static Context
+     * contains information which doesn't change and is the "outer scope" of the
+     * expression. It provides for example a base URI the expression can relate to and
+     * what functions and variables that are available for the expression.
+     *
+     * @see <a href="http://www.w3.org/TR/xpath20/#static_context">XML Path
+     * Language (XPath) 2.0, 2.1.1 Static Context</a>
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class StaticContext : public ReportContext
+    {
+    public:
+        /**
+         * A smart pointer wrapping StaticContext instances.
+         */
+        typedef QExplicitlySharedDataPointer<StaticContext> Ptr;
+
+        /**
+         * @see <a href="http://www.w3.org/TR/xquery/#id-boundary-space-decls">XQuery 1.0:
+         * An XML Query Language, 4.3 Boundary-space Declaration</a>
+         * @see <a href="http://www.w3.org/TR/xquery/#dt-boundary-space-policy">XQuery 1.0:
+         * An XML Query Language, Definition: Boundary-space policy</a>
+         */
+        enum BoundarySpacePolicy
+        {
+            BSPPreserve,
+            BSPStrip
+        };
+
+        /**
+         * @see <a href="http://www.w3.org/TR/xquery/#id-construction-declaration">XQuery 1.0:
+         * An XML Query Language, 4.6 Construction Declaration</a>
+         * @see <a href="http://www.w3.org/TR/xquery/#dt-construction-mode">XQuery 1.0:
+         * An XML Query Language, Definition: Construction mode</a>
+         */
+        enum ConstructionMode
+        {
+            CMPreserve,
+            CMStrip
+        };
+
+        /**
+         * @see <a href="http://www.w3.org/TR/xquery/#id-default-ordering-decl">XQuery 1.0:
+         * An XML Query Language, 4.7 Ordering Mode Declaration</a>
+         * @see <a href="http://www.w3.org/TR/xquery/#dt-ordering-mode">XQuery 1.0:
+         * An XML Query Language, Definition: Ordering mode</a>
+         */
+        enum OrderingMode
+        {
+            Ordered,
+            Unordered
+        };
+
+        /**
+         * @see <a href="http://www.w3.org/TR/xquery/#id-empty-order-decl">XQuery 1.0:
+         * An XML Query Language, 4.8 Empty Order Declaration</a>
+         * @see <a href="http://www.w3.org/TR/xquery/#dt-default-empty-order">XQuery 1.0:
+         * An XML Query Language, Definition: Default order for empty sequences</a>
+         */
+        enum OrderingEmptySequence
+        {
+            Greatest,
+            Least
+        };
+
+        enum InheritMode
+        {
+            Inherit,
+            NoInherit
+        };
+
+        enum PreserveMode
+        {
+            Preserve,
+            NoPreserve
+        };
+
+        inline StaticContext()
+        {
+        }
+
+        virtual ~StaticContext();
+
+        virtual NamespaceResolver::Ptr namespaceBindings() const = 0;
+        virtual void setNamespaceBindings(const NamespaceResolver::Ptr &) = 0;
+        virtual QExplicitlySharedDataPointer<FunctionFactory> functionSignatures() const = 0;
+        virtual QExplicitlySharedDataPointer<SchemaTypeFactory> schemaDefinitions() const = 0;
+
+        /**
+         * The base URI of the context. Typically, this is the base URI
+         * if of the element that contained the expression.
+         *
+         * The base URI is in this implementation is never undefined, but is
+         * always valid.
+         */
+        virtual QUrl baseURI() const = 0;
+
+        virtual void setBaseURI(const QUrl &uri) = 0;
+
+        /**
+         * @returns always the standard function namespace defined in
+         * <a href="http://www.w3.org/TR/xpath-functions/">XQuery 1.0 and
+         * XPath 2.0 Functions and Operators</a>
+         */
+        virtual QString defaultFunctionNamespace() const = 0;
+        virtual void setDefaultFunctionNamespace(const QString &ns) = 0;
+
+        virtual QString defaultElementNamespace() const = 0;
+        virtual void setDefaultElementNamespace(const QString &ns) = 0;
+
+        /**
+         * @returns the URI identifying the default collation. The function
+         * is responsible for ensuring a collation is always returned. If
+         * a collation is not provided by the user or the host language in the
+         * context, the Unicode codepoint URI should be returned.
+         */
+        virtual QUrl defaultCollation() const = 0;
+
+        virtual void setDefaultCollation(const QUrl &uri) = 0;
+
+        /**
+         * Determine whether Backwards Compatible Mode is used.
+         *
+         * @see <a href="http://www.w3.org/TR/xpath20/#id-backwards-compatibility">XML Path
+         * Language (XPath) 2.0, I Backwards Compatibility with XPath 1.0 (Non-Normative)</a>
+         * @see <a href="http://www.w3.org/TR/xpath20/#dt-xpath-compat-mode">XML Path
+         * Language (XPath) 2.0, Definition: XPath 1.0 compatibility mode</a>
+         */
+        virtual bool compatModeEnabled() const = 0;
+
+        virtual void setCompatModeEnabled(const bool newVal) = 0;
+
+        /**
+         * This is the DynamicContext that is used for pre-evaluation at
+         * compilation time, const-folding at the static stage.
+         */
+        virtual QExplicitlySharedDataPointer<DynamicContext> dynamicContext() const = 0;
+
+        virtual BoundarySpacePolicy boundarySpacePolicy() const = 0;
+        virtual void setBoundarySpacePolicy(const BoundarySpacePolicy policy) = 0;
+
+        virtual ConstructionMode constructionMode() const = 0;
+        virtual void setConstructionMode(const ConstructionMode mode) = 0;
+
+        virtual OrderingMode orderingMode() const = 0;
+        virtual void setOrderingMode(const OrderingMode mode) = 0;
+        virtual OrderingEmptySequence orderingEmptySequence() const = 0;
+        virtual void setOrderingEmptySequence(const OrderingEmptySequence ordering) = 0;
+
+        virtual InheritMode inheritMode() const = 0;
+        virtual void setInheritMode(const InheritMode mode) = 0;
+
+        virtual PreserveMode preserveMode() const = 0;
+        virtual void setPreserveMode(const PreserveMode mode) = 0;
+
+        /**
+         * @short The static type of the context item.
+         *
+         * Different StaticContext instances are used for different nodes in the
+         * AST to properly reflect the type of the focus. If the focus is undefined,
+         * this function must return @c null.
+         *
+         * @see <a href="http://www.w3.org/TR/xquery/#dt-context-item-static-type">XQuery
+         * 1.0: An XML Query Language, Definition: Context item static type</a>
+         */
+        virtual ItemType::Ptr contextItemType() const = 0;
+
+        /**
+         * @short The static type of the current item, as returned by @c
+         * fn:current().
+         */
+        virtual ItemType::Ptr currentItemType() const = 0;
+
+        /**
+         * Copies this StaticContext and returns the copy.
+         *
+         * The copy and original must not be independent. Since the StaticContext is modified
+         * during the compilation process, the copy must be independent from the original
+         * to the degree that is required for the subclass in question.
+         */
+        virtual StaticContext::Ptr copy() const = 0;
+
+        virtual ExternalVariableLoader::Ptr externalVariableLoader() const = 0;
+        virtual ResourceLoader::Ptr resourceLoader() const = 0;
+        virtual NamePool::Ptr namePool() const = 0;
+
+        /**
+         * @short Adds @p location for @p reflection.
+         */
+        virtual void addLocation(const SourceLocationReflection *const reflection,
+                                 const QSourceLocation &location) = 0;
+
+        /**
+         * @short Returns a hash of the contained locations.
+         *
+         * The key is the address for the expression, and the value is its location. Note
+         * that the key cannot be dereferenced, there's no guarantee the
+         * Expression is in scope. The key is merely an identifier.
+         */
+        virtual LocationHash sourceLocations() const = 0;
+
+        virtual VariableSlotID currentRangeSlot() const = 0;
+        virtual VariableSlotID allocateRangeSlot() = 0;
+
+        /**
+         * @short Ensures source locations are handled in such a manner that @p
+         * existingNode wraps @p newNode.
+         *
+         * Ensures that the source locations for @p existingNode, applies to
+         * @p newNode.
+         */
+        void wrapExpressionWith(const SourceLocationReflection *const existingNode,
+                                const QExplicitlySharedDataPointer<Expression> &newNode);
+    };
+}
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif