/*
 * Copyright (C) 2008, 2009 Apple Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#import <Foundation/Foundation.h>

#if MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_4
#define WebNSUInteger unsigned int
#else
#define WebNSUInteger NSUInteger
#endif

@class DOMRange;
@class DOMNode;
@class WebTextIteratorPrivate;

@interface WebTextIterator : NSObject {
@private
    WebTextIteratorPrivate *_private;
}

- (id)initWithRange:(DOMRange *)range;

/*!
 @method advance
 @abstract Makes the WebTextIterator iterate to the next visible text element.
 */
- (void)advance;

/*!
 @method atEnd
 @result YES if the WebTextIterator has reached the end of the DOMRange.
 */
- (BOOL)atEnd;

/*!
 @method currentRange
 @result A range, indicating the position within the document of the current text.
 */
- (DOMRange *)currentRange;

/*!
 @method currentTextPointer
 @result A pointer to the current text. The pointer becomes invalid after any modification is made to the document; it must be used right away.
 */
- (const unichar *)currentTextPointer;

/*!
 @method currentTextLength
 @result lengthPtr Length of the current text.
 */
- (WebNSUInteger)currentTextLength;

@end

@interface WebTextIterator (WebTextIteratorDeprecated)

/*!
 @method currentNode
 @abstract A convenience method that finds the first node in currentRange; it's almost always better to use currentRange instead.
 @result The current DOMNode in the WebTextIterator
 */
- (DOMNode *)currentNode;

/*!
 @method currentText
 @abstract A convenience method that makes an NSString out of the current text; it's almost always better to use currentTextPointer and currentTextLength instead.
 @result The current text in the WebTextIterator.
 */
- (NSString *)currentText;

@end

#undef WebNSUInteger