/*

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

 */

#ifndef DOMString_HEADER_GUARD_

#define DOMString_HEADER_GUARD_

#include <xercesc/util/XMemory.hpp>

#ifdef XML_DEBUG

#include "DOMStringImpl.hpp"

XERCES_CPP_NAMESPACE_BEGIN

#else

XERCES_CPP_NAMESPACE_BEGIN

class DOMStringHandle;

#endif

class DOM_NullPtr;

/**

 * <code>DOMString</code> is the generic string class that stores all strings

 * used in the DOM C++ API.

 *

 * Though this class supports most of the common string operations to manipulate

 * strings, it is not meant to be a comphrehensive string class.

 */

class DEPRECATED_DOM_EXPORT DOMString : public XMemory{

public:

    /** @name Constructors and assignment operator */

    //@{

    /**

      * Default constructor for DOMString.  The resulting DOMString

      * object refers to no string at all; it will compare == 0.

      *

      */

    DOMString();

    /**

      * Copy constructor.

      *

      * @param other The object to be copied.

      */

    DOMString(const DOMString &other);

    /**

      * Constructor to build a DOMString from an XML character array.

      * (XMLCh is a 16 bit UNICODE character).

      *

      * @param other The null-terminated character array to be

      *   that provides the initial value for the DOMString.

      */

    DOMString(const XMLCh *other);

    /**

      * Constructor to build a DOMString from a character array of given length.

      *

      * @param other The character array to be imported into the <code>DOMString</code>

      * @param length The length of the character array to be imported

      */

    DOMString(const XMLCh *other, unsigned int length);

    /**

      * Constructor to build a DOMString from an 8 bit character array.

      * The char * string will be transcoded to UNICODE using the default

      * code page on the system where the code is running.

      *

      * @param other The character array to be imported into the <code>DOMString</code>

      */

    DOMString(const char *other);

    /**

      * Construct a null DOMString.

      */

    DOMString(int nullPointerValue);

    /**

      * Assignment operator.  Make destination DOMString refer to the same

      *      underlying string in memory as the source string.

      *

      * @param other the source DOMString.

      */

    DOMString &        operator = (const DOMString &other);

    DOMString &        operator = (DOM_NullPtr *other);

    //@}

    /** @name Destructor. */

    //@{

	 /**

	  * Destructor for DOMString

	  *

	  */

    ~DOMString();

    //@}

    /** @name Operators for string manipulation. */

    //@{

    /**

      * Concatenate a DOMString to another.

      *

      * @param other The string to be concatenated.

      * @return The concatenated object

      */

    // DOMString   operator + (const DOMString &other);

    //@}

    /** @name Equality and Inequality operators. */

    //@{

    /**

      * Equality operator.

      *

      * @param other The object to be compared with.

      * @return True if the two DOMStrings refer to the same underlying string

      *  in memory.

      *  <p>

      *  WARNING:  operator == does NOT compare the contents of

      *  the two  strings.  To do this, use the <code>DOMString::equals()</code>

      *  This behavior is modelled after the String operations in Java, and

      *  is also similar to operator == on the other DOM_* classes.

      */

    bool        operator == (const DOMString &other) const;

    /**

      * Inequality operator.

      *

      * @param other The object to be compared with.

      * @return True if the two DOMStrings refer to different underlying strings in

      *    memory.

      * <p>

      *  WARNING:  operator == does NOT compare the contents of

      *  the two  strings.  To do this, use the <code>DOMString::equals()</code>

      *  This behavior is modelled after the String operations in Java, and

      *  is also similar to operator == on the other DOM_* classes.

      */

    bool        operator != (const DOMString &other) const;

    /**

      * Equality operator.  Test for a null DOMString, which is one that does

      *   not refer to any string at all; similar to a null object reference

      *   variable in Java.

      *

      * @param other must be 0 or null.

      * @return

      */

    bool        operator == (const DOM_NullPtr *other) const;

    /**

      * Inequality operator, for null test.

      *

      * @param other must be 0 or null.

      * @return True if the two strings are different, false otherwise

      */

    bool        operator != (const DOM_NullPtr *other) const;

    //@}

    /** @name Functions to change the string. */

    //@{

    /**

      * Preallocate storage in the string to hold a given number of characters.

      * A DOMString will grow its buffer on demand, as characters are added,

      * but it can be more efficient to allocate once in advance, if the size is known.

      *

      * @param size The number of 16 bit characters to reserve.

      */

    void reserve(unsigned int size);

    /**

      * Appends the content of another <code>DOMString</code> to this string.

      *

      * @param other The object to be appended

      */

    void        appendData(const DOMString &other);

    /**

      * Append a single Unicode character to this string.

      *

      * @param ch The single character to be appended

      */

    void        appendData(XMLCh ch);

     /**

      * Append a null-terminated XMLCh * (Unicode) string to this string.

      *

      * @param other The object to be appended

      */

    void        appendData(const XMLCh *other);

    /**

      * Appends the content of another <code>DOMString</code> to this string.

      *

      * @param other The object to be appended

      */

	DOMString& operator +=(const DOMString &other);

    /**

      * Appends the content of a c-style string to this string.

      *

      * @param other The string to be appended

      */

    DOMString& operator +=(const XMLCh* other);

    /**

      * Appends a character to this string.

      *

      * @param ch The character to be appended

      */

	DOMString& operator +=(XMLCh ch);

    /**

      * Clears the data of this <code>DOMString</code>.

      *

      * @param offset The position from the beginning from which the data must be deleted

      * @param count The count of characters from the offset that must be deleted

      */

    void        deleteData(unsigned int offset, unsigned int count);

    /**

      * Inserts a string within the existing <code>DOMString</code> at an arbitrary position.

      *

      * @param offset The offset from the beginning at which the insertion needs to be done

      *               in <code>this</code> object

      * @param data The <code>DOMString</code> containing the data that needs to be inserted

      * @return The object to be returned.

      */

    void        insertData(unsigned int offset, const DOMString &data);

    //@}

    /** @name Functions to get properties of the string. */

    //@{

    /**

      * Returns the character at the specified position.

      *

      * @param index The position at which the character is being requested

      * @return Returns the character at the specified position.

      */

    XMLCh       charAt(unsigned int index) const;

    /**

      * Returns a handle to the raw buffer in the <code>DOMString</code>.

      *

      * @return The pointer inside the <code>DOMString</code> containg the string data.

      *         Note: the data is not always null terminated.  Do not rely on

      *         a null being there, and do not add one, as several DOMStrings

      *         with different lengths may share the same raw buffer.

      */

    const XMLCh *rawBuffer() const;

    /**

      * Returns a copy of the string, transcoded to the local code page. The

      * caller owns the (char *) string that is returned, and is responsible

      * for deleting it.

      *

      * Note: The buffer returned is allocated using the global operator new

      *       and users need to make sure to use the corresponding delete [].

      *       This method will be deprecated in later versions, as we move

      *       towards using a memory manager for allocation and deallocation.

      *

      * @return A pointer to a newly allocated buffer of char elements, which

      *         represents the original string, but in the local encoding.

      */

    char        *transcode() const;

    /**

      * Returns a copy of the string, transcoded to the local code page. The

      * caller owns the (char *) string that is returned, and is responsible

      * for deleting it.

      *

      * @param  manager the memory manager to use for allocating returned

      *         returned buffer.

      *

      * @return A pointer to a newly allocated buffer of char elements, which

      *         represents the original string, but in the local encoding.

      */

    char        *transcode(MemoryManager* const manager) const;

    /**

      * Creates a DOMString, transcoded from an input 8 bit char * string

      * in the local code page.

      *

      * @param str The string to be transcoded

      * @return A new DOMString object

      */

    static DOMString transcode(const char* str);

    /**

      * Returns a sub-string of the <code>DOMString</code> starting at a specified position.

      *

      * @param offset The offset from the beginning from which the sub-string is being requested.

      * @param count The count of characters in the requested sub-string

      * @return The sub-string of the <code>DOMString</code> being requested

      */

    DOMString   substringData(unsigned int offset, unsigned int count) const;

    /**

      * Returns the length of the DOMString.

      *

      * @return The length of the string

      */

    unsigned int length() const;

    //@}

    /** @name Cloning function. */

    //@{

    /**

      * Makes a clone of a the DOMString.

      *

      * @return The object to be cloned.

      */

    DOMString   clone() const;

    //@}

    /** @name Print functions. */

    //@{

    /**

      * Dumps the <code>DOMString</code> on the console.

      *

      */

    void        print() const;

    /**

      * Dumps the <code>DOMString</code> on the console with a line feed at the end.

      *

      */

    void        println() const;

    //@}

    /** @name Functions to compare a string with another. */

    //@{

    /**

      * Compares a DOMString with another.

      *

      * This compareString does not match the semantics of the standard C strcmp.

      * All it needs to do is define some less than - equals - greater than

      * ordering of strings.  How doesn't matter.

      *

      *

      * @param other The object to be compared with

      * @return Either -1, 0, or 1 based on the comparison.

      */

    int         compareString(const DOMString &other) const;

    /**

      * Less than operator. It is a helper operator for compareString.

      *

      * @param other The object to be compared with.

      * @return True if this DOMString is lexically less than the other DOMString.

      */

    bool        operator < (const DOMString &other) const;

    /**

      * Tells if a <code>DOMString</code> contains the same character data

      * as another.

      *

      * @param other The DOMString to be compared with.

      * @return True if the two <code>DOMString</code>s are same, false otherwise.

      */

    bool        equals(const DOMString &other) const;

      /**

      * Compare a DOMString with a null-terminated raw 16-bit character

      * string.

      *

      * @param other The character string to be compared with.

      * @return True if the strings are the same, false otherwise.

      */

    bool        equals(const XMLCh  *other) const;

    //@}

    friend      class DOMStringData;

    friend      class DOMStringHandle;

    friend      class DomMemDebug;

private:

    DOMStringHandle         *fHandle;

    static int              gLiveStringHandleCount;

    static int              gTotalStringHandleCount;

    static int              gLiveStringDataCount;

    static int              gTotalStringDataCount;

};

/****** Global Helper Functions ******/

/**

  * Concatenate two DOMString's.

  *

  * @param lhs the first string

  * @param rhs the second string

  * @return The concatenated object

  */

DOMString DEPRECATED_DOM_EXPORT operator + (const DOMString &lhs, const DOMString &rhs);

/**

  * Concatenate a null terminated Unicode string to a DOMString.

  *

  * @param lhs the DOMString

  * @param rhs the XMLCh * string

  * @return The concatenated object

  */

DOMString DEPRECATED_DOM_EXPORT operator + (const DOMString &lhs, const XMLCh* rhs);

/**

  * Concatenate a DOMString to a null terminated Unicode string

  *

  * @param lhs the null-terminated Unicode string

  * @param rhs the DOMString

  * @return The concatenated object

  */

DOMString DEPRECATED_DOM_EXPORT operator + (const XMLCh* lhs, const DOMString &rhs);

/**

  * Concatenate a single Unicode character to a DOMString.

  *

  * @param lhs the DOMString

  * @param rhs the character

  * @return The concatenated object

  */

DOMString DEPRECATED_DOM_EXPORT operator + (const DOMString &lhs, XMLCh rhs);

/**

  * Concatenate a DOMString to a single Unicode character.

  *

  * @param lhs the character

  * @param rhs the DOMString

  * @return The concatenated object

  */

DOMString DEPRECATED_DOM_EXPORT operator + (XMLCh lhs, const DOMString &rhs);

XERCES_CPP_NAMESPACE_END

#endif