author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 17 Dec 2009 09:20:16 +0200 | |
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/* |
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* Copyright 2005 Frerich Raabe <raabe@kde.org> |
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* Copyright (C) 2006 Apple Computer, Inc. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef XPathValue_h |
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#define XPathValue_h |
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#if ENABLE(XPATH) |
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#include "PlatformString.h" |
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#include "XPathNodeSet.h" |
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namespace WebCore { |
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namespace XPath { |
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class ValueData : public Shared<ValueData> { |
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public: |
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ValueData() {} |
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ValueData(const NodeSet& nodeSet) : m_nodeSet(nodeSet) {} |
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ValueData(const String& string) : m_string(string) {} |
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NodeSet m_nodeSet; |
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String m_string; |
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}; |
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// Copying Value objects makes their data partially shared, so care has to be taken when dealing with copies. |
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class Value { |
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public: |
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enum Type { NodeSetValue, BooleanValue, NumberValue, StringValue }; |
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Value(unsigned value) : m_type(NumberValue), m_number(value) {} |
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Value(unsigned long value) : m_type(NumberValue), m_number(value) {} |
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Value(double value) : m_type(NumberValue), m_number(value) {} |
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Value(const char* value) : m_type(StringValue), m_data(new ValueData(value)) {} |
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Value(const String& value) : m_type(StringValue), m_data(new ValueData(value)) {} |
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Value(const NodeSet& value) : m_type(NodeSetValue), m_data(new ValueData(value)) {} |
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Value(Node* value) : m_type(NodeSetValue), m_data(new ValueData) { m_data->m_nodeSet.append(value); } |
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// This is needed to safely implement constructing from bool - with normal function overloading, any pointer type would match. |
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template<typename T> Value(T); |
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static const struct AdoptTag {} adopt; |
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Value(NodeSet& value, const AdoptTag&) : m_type(NodeSetValue), m_data(new ValueData) { value.swap(m_data->m_nodeSet); } |
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Type type() const { return m_type; } |
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bool isNodeSet() const { return m_type == NodeSetValue; } |
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bool isBoolean() const { return m_type == BooleanValue; } |
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bool isNumber() const { return m_type == NumberValue; } |
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bool isString() const { return m_type == StringValue; } |
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const NodeSet& toNodeSet() const; |
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NodeSet& modifiableNodeSet(); |
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bool toBoolean() const; |
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double toNumber() const; |
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String toString() const; |
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private: |
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Type m_type; |
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bool m_bool; |
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double m_number; |
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RefPtr<ValueData> m_data; |
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}; |
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template<> |
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inline Value::Value(bool value) |
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: m_type(BooleanValue) |
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, m_bool(value) |
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{ |
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} |
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} |
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} |
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#endif // ENABLE(XPATH) |
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#endif // XPath_Value_H |