/*

 * 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.

 */

/*

 * $Id: DOM_Text.hpp 568078 2007-08-21 11:43:25Z amassari $

 */

#ifndef DOM_Text_HEADER_GUARD_

#define DOM_Text_HEADER_GUARD_

#include <xercesc/util/XercesDefs.hpp>

#include "DOM_CharacterData.hpp"

XERCES_CPP_NAMESPACE_BEGIN

class TextImpl;

/**

 * The <code>Text</code> interface represents the textual content (termed

 * character  data in XML) of an <code>Element</code> or <code>Attr</code>.

 * If there is no markup inside an element's content, the text is contained

 * in a single object implementing the <code>Text</code> interface that is

 * the only child of the element. If there is markup, it is parsed into a

 * list of elements and <code>Text</code> nodes that form the list of

 * children of the element.

 * <p>When a document is first made available via the DOM, there is  only one

 * <code>Text</code> node for each block of text. Users may create  adjacent

 * <code>Text</code> nodes that represent the  contents of a given element

 * without any intervening markup, but should be aware that there is no way

 * to represent the separations between these nodes in XML, so they

 * will not (in general) persist between DOM editing sessions. The

 * <code>normalize()</code> method on <code>Element</code> merges any such

 * adjacent <code>Text</code> objects into a single node for each block of

 * text; this is  recommended before employing operations that depend on a

 * particular document structure, such as navigation with

 * <code>XPointers.</code>

 */

class DEPRECATED_DOM_EXPORT DOM_Text: public DOM_CharacterData {

    public:

    /** @name Constructors and assignment operator */

    //@{

    /**

      * Default constructor for DOM_Text.  The resulting object does not

      * refer to an actual Text node; it will compare == to 0, and is similar

      * to a null object reference variable in Java.  It may subsequently be

      * assigned to refer to an actual comment node.

      *

      */

    DOM_Text();

    /**

      * Copy constructor.  Creates a new <code>DOM_Text</code> that refers to the

      * same underlying node as the original.  See also DOM_Node::clone(),

      * which will copy the actual Text node, rather than just creating a new

      * reference to the original node.

      *

      * @param other The object to be copied.

      */

    DOM_Text(const DOM_Text &other);

    /**

      * Assignment operator.

      *

      * @param other The object to be copied.

      */

    DOM_Text & operator = (const DOM_Text &other);

    /**

      * Assignment operator.  This overloaded variant is provided for

      *   the sole purpose of setting a DOM_Node reference variable to

      *   zero.  Nulling out a reference variable in this way will decrement

      *   the reference count on the underlying Node object that the variable

      *   formerly referenced.  This effect is normally obtained when reference

      *   variable goes out of scope, but zeroing them can be useful for

      *   global instances, or for local instances that will remain in scope

      *   for an extended time,  when the storage belonging to the underlying

      *   node needs to be reclaimed.

      *

      * @param val  Only a value of 0, or null, is allowed.

      */

    DOM_Text & operator = (const DOM_NullPtr *val);

    //@}

    /** @name Destructor. */

    //@{

	 /**

	  * Destructor for DOM_Text. The object being destroyed is the reference

      * object, not the underlying Comment node itself.

	  *

	  */

    ~DOM_Text();

    //@}

    /** @name Functions to modify the Text node. */

    //@{

    /**

     * Breaks this node into two nodes at the specified

     * offset, keeping both in the tree as siblings.

     *

     * This node then only

     * contains all the content up to the <code>offset</code> point. And a new

     * node of the same nodeType, which is inserted as the next sibling of this

     * node, contains all the content at and after the <code>offset</code>

     * point. When the <code>offset</code> is equal to the lenght of this node,

     * the new node has no data.

     * @param offset The offset at which to split, starting from 0.

     * @return The new <code>Text</code> node.

     * @exception DOMException

     *   INDEX_SIZE_ERR: Raised if the specified offset is negative or greater

     *   than the number of characters in <code>data</code>.

     *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.

     */

    DOM_Text splitText(unsigned int offset);

    //@}

    /** @name Non-standard (not defined by the DOM specification) functions. */

    //@{

    /**

     *

     * Return true if this node contains ignorable whitespaces only.

     * @return True if this node contains ignorable whitespaces only.

     */

    bool isIgnorableWhitespace();

    //@}

protected:

    DOM_Text(TextImpl *);

    friend class DOM_Document;

    friend class RangeImpl;

};

XERCES_CPP_NAMESPACE_END

#endif