/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the  "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#if !defined(DOMSERVICES_HEADER_GUARD_1357924680)
#define DOMSERVICES_HEADER_GUARD_1357924680


// Base include file.  Must be first.
#include <xalanc/DOMSupport/DOMSupportDefinitions.hpp>


#include <xalanc/XalanDOM/XalanDOMString.hpp>
#include <xalanc/XalanDOM/XalanAttr.hpp>
#include <xalanc/XalanDOM/XalanComment.hpp>
#include <xalanc/XalanDOM/XalanDocument.hpp>
#include <xalanc/XalanDOM/XalanElement.hpp>
#include <xalanc/XalanDOM/XalanProcessingInstruction.hpp>
#include <xalanc/XalanDOM/XalanText.hpp>


#include <xalanc/PlatformSupport/DOMStringHelper.hpp>
#include <xalanc/PlatformSupport/ExecutionContext.hpp>
#include <xalanc/PlatformSupport/FormatterListener.hpp>


namespace XALAN_CPP_NAMESPACE {


class XalanDocument;
class XalanDocumentFragment;


class XALAN_DOMSUPPORT_EXPORT DOMServices
{
public:

    static const XalanDOMString&    s_XMLString;
    static const XalanDOMString&    s_XMLStringWithSeparator;
    static const XalanDOMString&    s_XMLNamespacePrefix;
    static const XalanDOMString&    s_XMLNamespaceURI;
    static const XalanDOMString&    s_XMLNamespace;
    static const XalanDOMString&    s_XMLNamespaceWithSeparator;
    static const XalanDOMString&    s_XMLNamespaceSeparatorString;
    static const XalanDOMString&    s_XMLNamespacePrefixURI;

    static const XalanDOMString::size_type&     s_XMLStringLength;
    static const XalanDOMString::size_type&     s_XMLStringWithSeparatorLength;
    static const XalanDOMString::size_type&     s_XMLNamespacePrefixLength;
    static const XalanDOMString::size_type&     s_XMLNamespaceURILength;
    static const XalanDOMString::size_type&     s_XMLNamespaceLength;
    static const XalanDOMString::size_type&     s_XMLNamespaceWithSeparatorLength;
    static const XalanDOMString::size_type&     s_XMLNamespaceSeparatorStringLength;
    static const XalanDOMString::size_type&     s_XMLNamespacePrefixURILength;


    // A dummy string to return when we need an emtpy string...
    static const XalanDOMString     s_emptyString;


    /**
     * Initialize static data.  Must be called before any
     * other functions are called.
     */
    static void
    initialize(MemoryManager&   theManager);

    /**
     * Destroy static data.  After thus function is called,
     * no other functions can be called.
     */
    static void
    terminate();


    /**
     * Retrieves data for node
     * 
     * @param node DOM node whose data is to be returned
     * @param data a string to which the node's data will be appended
     */
    static void
    getNodeData(
            const XalanNode&    node,
            XalanDOMString&     data);

    /**
     * Retrieves data for node
     * 
     * @param node DOM node whose data is to be returned
     * @param context The current execution context
     * @param data a string to which the node's data will be appended
     */
    static void
    getNodeData(
            const XalanNode&    node,
            ExecutionContext&   context,
            XalanDOMString&     data)
    {
        if (!context.hasPreserveOrStripSpaceConditions())
        {
            getNodeData(node, data);
        }
        else
        {
            doGetNodeData(node, context, data);
        }
    }


    /**
     * Retrieves data for node
     * 
     * @param attribute DOM node whose data is to be returned
     * @param data a string to which the node's data will be appended
     */
    static void
    getNodeData(
            const XalanAttr&    attribute,
            XalanDOMString&     data)
    {
        data.append(attribute.getNodeValue());
    }


    /**
     * Retrieves data for node
     * 
     * @param comment DOM node whose data is to be returned
     * @param data a string to which the node's data will be appended
     */
    static void
    getNodeData(
            const XalanComment&     comment,
            XalanDOMString&         data)
    {
        data.append(comment.getData());
    }

    /**
     * Retrieves data for node
     * 
     * @param document DOM node whose data is to be returned
     * @param data a string to which the node's data will be appended
     */
    static void
    getNodeData(
            const XalanDocument&    document,
            XalanDOMString&         data);

    /**
     * Retrieves data for node
     * 
     * @param document The DOM node whose data is to be returned
     * @param context The current execution context
     * @param data a string to which the node's data will be appended
     */
    static void
    getNodeData(
            const XalanDocument&    document,
            ExecutionContext&       context,
            XalanDOMString&         data)
    {
        if (!context.hasPreserveOrStripSpaceConditions())
        {
            getNodeData(document, data);
        }
        else
        {
            doGetNodeData(document, context, data);
        }
    }

    /**
     * Retrieves data for node
     * 
     * @param documentFragment The DOM node whose data is to be returned
     * @param data a string to which the node's data will be appended
     */
    static void
    getNodeData(
            const XalanDocumentFragment&    documentFragment,
            XalanDOMString&                 data);

    /**
     * Retrieves data for node
     * 
     * @param documentFragment The DOM node whose data is to be returned
     * @param context The current execution context
     * @param data a string to which the node's data will be appended
     */
    static void
    getNodeData(
            const XalanDocumentFragment&    documentFragment,
            ExecutionContext&               context,
            XalanDOMString&                 data)
    {
        if (!context.hasPreserveOrStripSpaceConditions())
        {
            getNodeData(documentFragment, data);
        }
        else
        {
            doGetNodeData(documentFragment, context, data);
        }
    }

    /**
     * Retrieves data for node
     * 
     * @param element DOM node whose data is to be returned
     * @param data a string to which the node's data will be appended
     */
    static void
    getNodeData(
            const XalanElement&     element,
            XalanDOMString&         data);

    /**
     * Retrieves data for node
     * 
     * @param node DOM node whose data is to be returned
     * @param context The current execution context
     * @param data a string to which the node's data will be appended
     */
    static void
    getNodeData(
            const XalanElement&     element,
            ExecutionContext&       context,
            XalanDOMString&         data)
    {
        if (!context.hasPreserveOrStripSpaceConditions())
        {
            getNodeData(element, data);
        }
        else
        {
            doGetNodeData(element, context, data);
        }
    }

    /**
     * Retrieves data for node
     * 
     * @param pi DOM node whose data is to be returned
     * @param data a string to which the node's data will be appended
     */
    static void
    getNodeData(
            const XalanProcessingInstruction&   pi,
            XalanDOMString&                     data)
    {
        data.append(pi.getData());
    }

    /**
     * Retrieves data for node
     * 
     * @param node DOM node whose data is to be returned
     * @param data a string to which the node's data will be appended
     */
    static void
    getNodeData(
            const XalanText&    text,
            XalanDOMString&     data)
    {
        data.append(text.getData());
    }

    /**
     * Retrieves data for node
     * 
     * @param text DOM node whose data is to be returned
     * @param context The current execution context
     * @param data a string to which the node's data will be appended
     */
    static void
    getNodeData(
            const XalanText&    text,
            ExecutionContext&   context,
            XalanDOMString&     data)
    {
        if (!context.hasPreserveOrStripSpaceConditions())
        {
            getNodeData(text, data);
        }
        else
        {
            doGetNodeData(text, context, data);
        }
    }

    typedef void (FormatterListener::*MemberFunctionPtr)(const XMLCh* const, const FormatterListener::size_type);

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param node DOM node whose data is to be returned
     * @param formatterListener the FormatterListener instance to receive the data
     * @param function A pointer to the member function of FormatterListener to call
     */
    static void
    getNodeData(
            const XalanNode&    node,
            FormatterListener&  formatterListener,
            MemberFunctionPtr   function);

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param node DOM node whose data is to be returned
     * @param context The current execution context
     * @param formatterListener the FormatterListener instance to receive the data
     * @param function A pointer to the member function of FormatterListener to call
     */
    static void
    getNodeData(
            const XalanNode&    node,
            ExecutionContext&   context,
            FormatterListener&  formatterListener,
            MemberFunctionPtr   function)
    {
        if (!context.hasPreserveOrStripSpaceConditions())
        {
            getNodeData(node, formatterListener, function);
        }
        else
        {
            doGetNodeData(node, context, formatterListener, function);
        }
    }

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param attribute DOM node whose data is to be returned
     * @param formatterListener the FormatterListener instance to receive the data
     * @param fRaw Whether or not the data should be sent raw.
     */
    static void
    getNodeData(
            const XalanAttr&    attribute,
            FormatterListener&  formatterListener,
            MemberFunctionPtr   function)
    {
        sendData(formatterListener, function, attribute.getNodeValue());
    }

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param comment DOM node whose data is to be returned
     * @param formatterListener the FormatterListener instance to receive the data
     * @param fRaw Whether or not the data should be sent raw.
     */
    static void
    getNodeData(
            const XalanComment&     comment,
            FormatterListener&      formatterListener,
            MemberFunctionPtr       function)
    {
        sendData(formatterListener, function, comment.getData());
    }

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param document DOM node whose data is to be returned
     * @param formatterListener the FormatterListener instance to receive the data
     * @param fRaw Whether or not the data should be sent raw.
     */
    static void
    getNodeData(
            const XalanDocument&    document,
            FormatterListener&      formatterListener,
            MemberFunctionPtr       function);

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param node DOM node whose data is to be returned
     * @param context The current execution context
     * @param formatterListener the FormatterListener instance to receive the data
     * @param function A pointer to the member function of FormatterListener to call
     */
    static void
    getNodeData(
            const XalanDocument&    document,
            ExecutionContext&       context,
            FormatterListener&      formatterListener,
            MemberFunctionPtr       function)
    {
        if (!context.hasPreserveOrStripSpaceConditions())
        {
            getNodeData(document, formatterListener, function);
        }
        else
        {
            doGetNodeData(document, context, formatterListener, function);
        }
    }

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param documentFragment DOM node whose data is to be sent
     * @param formatterListener the FormatterListener instance to receive the data
     * @param fRaw Whether or not the data should be sent raw.
     */
    static void
    getNodeData(
            const XalanDocumentFragment&    documentFragment,
            FormatterListener&              formatterListener,
            MemberFunctionPtr               function);

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param documentFragment DOM node whose data is to be sent
     * @param context The current execution context
     * @param formatterListener the FormatterListener instance to receive the data
     * @param fRaw Whether or not the data should be sent raw.
     */
    static void
    getNodeData(
            const XalanDocumentFragment&    documentFragment,
            ExecutionContext&               context,
            FormatterListener&              formatterListener,
            MemberFunctionPtr               function)
    {
        if (!context.hasPreserveOrStripSpaceConditions())
        {
            getNodeData(documentFragment, formatterListener, function);
        }
        else
        {
            doGetNodeData(documentFragment, context, formatterListener, function);
        }
    }

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param element DOM node whose data is to be returned
     * @param formatterListener the FormatterListener instance to receive the data
     * @param fRaw Whether or not the data should be sent raw.
     */
    static void
    getNodeData(
            const XalanElement&     element,
            FormatterListener&      formatterListener,
            MemberFunctionPtr       function);

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param node DOM node whose data is to be returned
     * @param context The current execution context
     * @param formatterListener the FormatterListener instance to receive the data
     * @param function A pointer to the member function of FormatterListener to call
     */
    static void
    getNodeData(
            const XalanElement&     element,
            ExecutionContext&       context,
            FormatterListener&      formatterListener,
            MemberFunctionPtr       function)
    {
        if (!context.hasPreserveOrStripSpaceConditions())
        {
            getNodeData(element, formatterListener, function);
        }
        else
        {
            doGetNodeData(element, context, formatterListener, function);
        }
    }

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param pi DOM node whose data is to be returned
     * @param formatterListener the FormatterListener instance to receive the data
     * @param fRaw Whether or not the data should be sent raw.
     */
    static void
    getNodeData(
            const XalanProcessingInstruction&   pi,
            FormatterListener&                  formatterListener,
            MemberFunctionPtr                   function)
    {
        sendData(formatterListener, function, pi.getData());
    }

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param node DOM node whose data is to be returned
     * @param formatterListener the FormatterListener instance to receive the data
     * @param fRaw Whether or not the data should be sent raw.
     */
    static void
    getNodeData(
            const XalanText&    text,
            FormatterListener&  formatterListener,
            MemberFunctionPtr   function)
    {
        sendData(formatterListener, function, text.getData());
    }

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param node DOM node whose data is to be returned
     * @param context The current execution context
     * @param formatterListener the FormatterListener instance to receive the data
     * @param fRaw Whether or not the data should be sent raw.
     */
    static void
    getNodeData(
            const XalanText&    text,
            ExecutionContext&   context,
            FormatterListener&  formatterListener,
            MemberFunctionPtr   function)
    {
        if (!context.hasPreserveOrStripSpaceConditions())
        {
            getNodeData(text, formatterListener, function);
        }
        else
        {
            doGetNodeData(text, context, formatterListener, function);
        }
    }

    /**
     * Retrieve the name of the node, taking into
     * account the differences between the DOM and
     * XSLT data models.
     * 
     * @param node  DOM node whose name is returned
     * @return name of the node
     */
    static const XalanDOMString&
    getNameOfNode(const XalanNode&  n);

    /**
     * Retrieve the name of the node, taking into
     * account the differences between the DOM and
     * XSLT data models.
     * 
     * @param attr  DOM attribute node whose name is returned
     * @return name of the node
     */
    static const XalanDOMString&
    getNameOfNode(const XalanAttr&  attr)
    {
        const XalanDOMString&   theName = attr.getNodeName();

        if (startsWith(theName, s_XMLNamespaceWithSeparator) == true)
        {
            // Special case for namespace nodes...
            return attr.getLocalName();
        }
        else if (equals(theName, s_XMLNamespace) == true)
        {
            return s_emptyString;
        }
        else
        {
            return theName;
        }
    }

    /**
     * Retrieve the name of the node, taking into
     * account the differences between the DOM and
     * XSLT data models.
     * 
     * @param attr  DOM element node whose name is returned
     * @return name of the node
     */
    static const XalanDOMString&
    getNameOfNode(const XalanElement&   element)
    {
        return element.getNodeName();
    }

    /**
     * Retrieve local name of node, taking into
     * account the differences between the DOM and
     * XSLT data models.
     * 
     * @param node  DOM node whose name is returned
     * @return name of node without namespace
     */
    static const XalanDOMString&
    getLocalNameOfNode(const XalanNode&     n)
    {
        const XalanDOMString&   theLocalName = n.getLocalName();

        if (theLocalName.empty() == false)
        {
            return theLocalName;
        }
        else
        {
            return n.getNodeName();
        }
    }

    /**
     * Retrieve the namespace of the node, taking into
     * account the differences between the DOM and
     * XSLT data models.
     * 
     * @param node  DOM node whose namespace is returned
     * @return namespace of the node
     */
    static const XalanDOMString&
    getNamespaceOfNode(const XalanNode& n);

    /**
     * Determine whether or not an attribute node
     * is declaring a namespace.
     * 
     * @param node  DOM node to check
     * @return true if the attribute is declaring a namespace, false if not.
     */
    static bool
    isNamespaceDeclaration(const XalanAttr&     n)
    {
        const XalanDOMString&   theName = n.getNodeName();

        return startsWith(theName, DOMServices::s_XMLNamespaceWithSeparator) == true ||
                equals(theName, DOMServices::s_XMLNamespace) == true;
    }

    /**
     * Retrieve the parent of a node. This function has to be implemented,
     * because the DOM WG decided that attributes don't have parents.
     * 
     * @param node child node
     * @return parent node
     */
    static XalanNode*
    getParentOfNode(const XalanNode&    node)
    {
        if(node.getNodeType() == XalanNode::ATTRIBUTE_NODE)
        {
            return static_cast<const XalanAttr&>(node).getOwnerElement();
        }
        else
        {
            return node.getParentNode();
        }
    }

    /**
     * Retrieve the URI corresponding to a namespace prefix
     * 
     * @param prefix           prefix for a namespace
     * @param namespaceContext DOM element representing the context for namespace
     * @return URI corresponding to namespace
     */
    static const XalanDOMString*
    getNamespaceForPrefix(
            const XalanDOMString&   prefix,
            const XalanElement&     namespaceContext);

    /**
     * Retrieve the URI corresponding to a namespace prefix, using the supplied
     * name, and PrefixResolver.  The routine also returns the prefix.
     * 
     * @param theName           The name that contains the prefix
     * @param thePrefixResolver The PrefixResolver to use
     * @param isAttribute       If true, special rules for attributes are used
     * @param thePrefix         The prefix
     * @return URI corresponding to namespace
     */
    static const XalanDOMString*
    getNamespaceForPrefix(
            const XalanDOMChar*     theName,
            const PrefixResolver&   thePrefixResolver,
            bool                    isAttribute,
            XalanDOMString&         thePrefix);

    /**
     * Determine if a node is after another node, in document order.
     *
     * @param node1 The first node
     * @param node2 The second node
     * @return true if node1 one is after node2, or false if it is not.
     */
    static bool
    isNodeAfter(
            const XalanNode&    node1,
            const XalanNode&    node2);

    /**
     * Determine if a node is after another node in the sibling list.
     *
     * @param parent The parent of the nodes.
     * @param node1 The first node
     * @param node2 The second node
     * @return true if node1 one is after node2, or false if it is not.
     */
    static bool
    isNodeAfterSibling(
            const XalanNode&    parent,
            const XalanNode&    child1,
            const XalanNode&    child2);

private:

    friend void
    getChildData(
            const XalanNode*    child,
            XalanDOMString&     data);

    friend void
    getChildData(
            const XalanNode*    child,
            ExecutionContext&   executionContext,
            XalanDOMString&     data);

    friend void
    getChildData(
            const XalanNode*                child,
            FormatterListener&              formatterListener,
            DOMServices::MemberFunctionPtr  function);

    /**
     * Retrieves data for node
     * 
     * @param node DOM node whose data is to be returned
     * @param context The current execution context
     * @param data a string to which the node's data will be appended
     */
    static void
    doGetNodeData(
            const XalanNode&    node,
            ExecutionContext&   executionContext,
            XalanDOMString&     data);

    /**
     * Retrieves data for node
     * 
     * @param document DOM node whose data is to be returned
     * @param context The current execution context
     * @param data a string to which the node's data will be appended
     */
    static void
    doGetNodeData(
            const XalanDocument&    document,
            ExecutionContext&       context,
            XalanDOMString&         data);

    /**
     * Retrieves data for node
     * 
     * @param documentFragment DOM node whose data is to be returned
     * @param context The current execution context
     * @param data a string to which the node's data will be appended
     */
    static void
    doGetNodeData(
            const XalanDocumentFragment&    documentFragment,
            ExecutionContext&               context,
            XalanDOMString&                 data);

    /**
     * Retrieves data for node
     * 
     * @param element DOM node whose data is to be returned
     * @param context The current execution context
     * @param data a string to which the node's data will be appended
     */
    static void
    doGetNodeData(
            const XalanElement&     element,
            ExecutionContext&       context,
            XalanDOMString&         data);

    /**
     * Retrieves data for node
     * 
     * @param node DOM node whose data is to be returned
     * @param context The current execution context
     * @param data a string to which the node's data will be appended
     */
    static void
    doGetNodeData(
            const XalanText&    text,
            ExecutionContext&   context,
            XalanDOMString&     data)
    {
        assert(context.hasPreserveOrStripSpaceConditions() == true);

        if (context.shouldStripSourceNode(text) == false)
        {
            data.append(text.getData());
        }
    }

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param node DOM node whose data is to be returned
     * @param context The current execution context
     * @param formatterListener the FormatterListener instance to receive the data
     * @param function A pointer to the member function of FormatterListener to call
     */
    static void
    doGetNodeData(
            const XalanNode&    node,
            ExecutionContext&   context,
            FormatterListener&  formatterListener,
            MemberFunctionPtr   function);

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param node DOM node whose data is to be returned
     * @param context The current execution context
     * @param formatterListener the FormatterListener instance to receive the data
     * @param function A pointer to the member function of FormatterListener to call
     */
    static void
    doGetNodeData(
            const XalanDocument&    document,
            ExecutionContext&       context,
            FormatterListener&      formatterListener,
            MemberFunctionPtr       function);

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param documentFragment DOM node whose data is to be sent
     * @param context The current execution context
     * @param formatterListener the FormatterListener instance to receive the data
     * @param fRaw Whether or not the data should be sent raw.
     */
    static void
    doGetNodeData(
            const XalanDocumentFragment&    documentFragment,
            ExecutionContext&               context,
            FormatterListener&              formatterListener,
            MemberFunctionPtr               function);

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param node DOM node whose data is to be returned
     * @param context The current execution context
     * @param formatterListener the FormatterListener instance to receive the data
     * @param function A pointer to the member function of FormatterListener to call
     */
    static void
    doGetNodeData(
            const XalanElement&     element,
            ExecutionContext&       context,
            FormatterListener&      formatterListener,
            MemberFunctionPtr       function);

    /**
     * Sends the data for a node to a FormatterListener
     * 
     * @param node DOM node whose data is to be returned
     * @param context The current execution context
     * @param formatterListener the FormatterListener instance to receive the data
     * @param fRaw Whether or not the data should be sent raw.
     */
    static void
    doGetNodeData(
            const XalanText&    text,
            ExecutionContext&   context,
            FormatterListener&  formatterListener,
            MemberFunctionPtr   function)
    {
        assert(context.hasPreserveOrStripSpaceConditions() == true);

        if (context.shouldStripSourceNode(text) == false)
        {
            sendData(formatterListener, function, text.getData());
        }
    }

    /**
     * Utility function to send data to a FormatterListener
     *
     * @param formatterListener The FormatterListener instance.
     * @param fRaw Whether or not the data should be sent raw.
     * @param data The data to send.
     */
    static void
    sendData(
            FormatterListener&      formatterListener,
            MemberFunctionPtr       function,
            const XalanDOMString&   data)
    {
        const XalanDOMString::size_type     theLength =
            data.length();

        if (theLength != 0)
        {
            assert(theLength == FormatterListener::size_type(theLength));

            (formatterListener.*function)(
                data.c_str(),
                FormatterListener::size_type(theLength));
        }
    }
};


}


#endif  // DOMSERVICES_HEADER_GUARD_1357924680