textboundaries.mm

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2004, 2006 Apple Computer, 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 COMPUTER, 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 COMPUTER, 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 "config.h"
#import "TextBoundaries.h"

namespace WebCore {

void findWordBoundary(const UChar* chars, int len, int position, int* start, int* end)
{
    NSString* string = [[NSString alloc] initWithCharactersNoCopy:const_cast<unichar*>(chars)
        length:len freeWhenDone:NO];
    NSAttributedString* attr = [[NSAttributedString alloc] initWithString:string];
    NSRange range = [attr doubleClickAtIndex:(position >= len) ? len - 1 : position];
    [attr release];
    [string release];
    *start = range.location;
    *end = range.location + range.length;
}

int findNextWordFromIndex(const UChar* chars, int len, int position, bool forward)
{   
    NSString* string = [[NSString alloc] initWithCharactersNoCopy:const_cast<unichar*>(chars)
        length:len freeWhenDone:NO];
    NSAttributedString* attr = [[NSAttributedString alloc] initWithString:string];
    int result = [attr nextWordFromIndex:position forward:forward];
    [attr release];
    [string release];
    return result;
}

}