1/* 2 * Copyright (C) 2004, 2006, 2011 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#import "config.h" 27#import "TextBoundaries.h" 28 29#import <wtf/RetainPtr.h> 30 31namespace WebCore { 32 33void findWordBoundary(const UChar* chars, int len, int position, int* start, int* end) 34{ 35 NSString* string = [[NSString alloc] initWithCharactersNoCopy:const_cast<unichar*>(chars) 36 length:len freeWhenDone:NO]; 37 NSAttributedString* attr = [[NSAttributedString alloc] initWithString:string]; 38 NSRange range = [attr doubleClickAtIndex:(position >= len) ? len - 1 : position]; 39 [attr release]; 40 [string release]; 41 *start = range.location; 42 *end = range.location + range.length; 43} 44 45static CFStringTokenizerRef wordStringTokenizer(CFStringRef string) 46{ 47 static CFStringTokenizerRef stringTokenizer; 48 if (stringTokenizer) 49 CFStringTokenizerSetString(stringTokenizer, string, CFRangeMake(0, CFStringGetLength(string))); 50 else 51 stringTokenizer = CFStringTokenizerCreate(kCFAllocatorDefault, string, CFRangeMake(0, CFStringGetLength(string)), kCFStringTokenizerUnitWord, 0); 52 53 return stringTokenizer; 54} 55 56int findNextWordFromIndex(const UChar* chars, int len, int position, bool forward) 57{ 58 RetainPtr<CFStringRef> string(AdoptCF, CFStringCreateWithCharactersNoCopy(kCFAllocatorDefault, chars, len, kCFAllocatorNull)); 59 CFStringTokenizerRef stringTokenizer = wordStringTokenizer(string.get()); 60 61 CFIndex lastTokenStart = 0; 62 while (true) { 63 CFStringTokenizerTokenType tokenType = CFStringTokenizerAdvanceToNextToken(stringTokenizer); 64 if (tokenType == kCFStringTokenizerTokenNone) 65 return forward ? len : lastTokenStart; 66 67 CFRange tokenRange = CFStringTokenizerGetCurrentTokenRange(stringTokenizer); 68 69 if (!forward && tokenRange.location >= position) 70 return lastTokenStart; 71 if (forward && tokenRange.location + tokenRange.length > position) 72 return tokenRange.location + tokenRange.length; 73 74 lastTokenStart = tokenRange.location; 75 } 76} 77 78} 79