1 /*
2 * Copyright (C) 2006 Zack Rusin <zack@kde.org>
3 *
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "config.h"
29
30 #include "TextBoundaries.h"
31 #include "NotImplemented.h"
32
33 #include <QString>
34 #include <QChar>
35
36 #include <QDebug>
37 #include <stdio.h>
38
39 #if QT_VERSION >= 0x040400
40 #include <qtextboundaryfinder.h>
41
42 namespace WebCore {
43
findNextWordFromIndex(UChar const * buffer,int len,int position,bool forward)44 int findNextWordFromIndex(UChar const* buffer, int len, int position, bool forward)
45 {
46 QString str(reinterpret_cast<QChar const*>(buffer), len);
47 QTextBoundaryFinder iterator(QTextBoundaryFinder::Word, str);
48 iterator.setPosition(position >= len ? len - 1 : position);
49 if (forward) {
50 int pos = iterator.toNextBoundary();
51 while (pos > 0) {
52 if (QChar(buffer[pos-1]).isLetterOrNumber())
53 return pos;
54 pos = iterator.toNextBoundary();
55 }
56 return len;
57 } else {
58 int pos = iterator.toPreviousBoundary();
59 while (pos > 0) {
60 if (QChar(buffer[pos]).isLetterOrNumber())
61 return pos;
62 pos = iterator.toPreviousBoundary();
63 }
64 return 0;
65 }
66 }
67
findWordBoundary(UChar const * buffer,int len,int position,int * start,int * end)68 void findWordBoundary(UChar const* buffer, int len, int position, int* start, int* end)
69 {
70 QString str(reinterpret_cast<QChar const*>(buffer), len);
71 QTextBoundaryFinder iterator(QTextBoundaryFinder::Word, str);
72 iterator.setPosition(position);
73 *start = position > 0 ? iterator.toPreviousBoundary() : 0;
74 *end = position == len ? len : iterator.toNextBoundary();
75 }
76
77 }
78
79 #else
80 namespace WebCore {
81
findNextWordFromIndex(UChar const * buffer,int len,int position,bool forward)82 int findNextWordFromIndex(UChar const* buffer, int len, int position, bool forward)
83 {
84 QString str(reinterpret_cast<QChar const*>(buffer), len);
85 notImplemented();
86 return 0;
87 }
88
findWordBoundary(UChar const * buffer,int len,int position,int * start,int * end)89 void findWordBoundary(UChar const* buffer, int len, int position, int* start, int* end)
90 {
91 QString str(reinterpret_cast<QChar const*>(buffer), len);
92
93 if (position > str.length()) {
94 *start = 0;
95 *end = 0;
96 return;
97 }
98
99 int currentPosition = position - 1;
100 QString foundWord;
101 while (currentPosition >= 0 &&
102 str[currentPosition].isLetter()) {
103 foundWord.prepend(str[currentPosition]);
104 --currentPosition;
105 }
106
107 // currentPosition == 0 means the first char is not letter
108 // currentPosition == -1 means we reached the beginning
109 int startPos = (currentPosition < 0) ? 0 : ++currentPosition;
110 currentPosition = position;
111 if (str[currentPosition].isLetter()) {
112 while (str[currentPosition].isLetter()) {
113 foundWord.append(str[currentPosition]);
114 ++currentPosition;
115 }
116 }
117
118 *start = startPos;
119 *end = currentPosition;
120 }
121
122 }
123 #endif
124