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comparison engine/core/util/utf8/utf8stringeditor.cpp @ 228:756b895e1dab

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Merged unicode-support back into trunk. Now all GUI/visible strings should be unicode. Internal strings unchanged. Remember to use a font that actually has the desired codepoints. Current default unicode policiy is 'ignore'.
author phoku@33b003aa-7bff-0310-803a-e67f0ece8222
date Sat, 21 Mar 2009 10:38:11 +0000
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227:d642169490f7 228:756b895e1dab
1 /***************************************************************************
2 * Copyright (C) 2009 by the FIFE team *
3 * http://www.fifengine.de *
4 * This file is part of FIFE. *
5 * *
6 * FIFE is free software; you can redistribute it and/or *
7 * modify it under the terms of the GNU Lesser General Public *
8 * License as published by the Free Software Foundation; either *
9 * version 2.1 of the License, or (at your option) any later version. *
10 * *
11 * This library is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
14 * Lesser General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU Lesser General Public *
17 * License along with this library; if not, write to the *
18 * Free Software Foundation, Inc., *
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
20 ***************************************************************************/
21
22 // Standard C++ library includes
23 #include <iostream>
24
25 // 3rd party library includes
26
27 // FIFE includes
28 // These includes are split up in two parts, separated by one empty line
29 // First block: files included from the FIFE root src directory
30 // Second block: files included from the same folder
31 #include "utf8stringeditor.h"
32 #include "utf8.h"
33
34 namespace gcn {
35
36 int UTF8StringEditor::nextChar(const std::string & text, int byteOffset)
37 {
38 std::string::const_iterator c, e;
39
40 c = text.begin() + byteOffset;
41 e = text.end();
42
43 utf8::next(c, e);
44 return std::string(text.begin(), c).size();
45 }
46
47 int UTF8StringEditor::prevChar(const std::string & text, int byteOffset)
48 {
49 std::string::const_iterator c, b;
50
51 c = text.begin() + byteOffset;
52 b = text.begin();
53
54 utf8::prior(c, b);
55 return std::string(b, c).size();
56 }
57
58 int UTF8StringEditor::eraseChar(std::string & text, int byteOffset)
59 {
60 std::string::iterator begin, cur;
61 begin = text.begin() + byteOffset;
62 cur = begin;
63 utf8::next(cur, text.end());
64
65 text = std::string(text.begin(), begin) + std::string(cur, text.end());
66 return byteOffset; // this shouldn't change!
67 }
68
69 int UTF8StringEditor::insertChar(std::string & text, int byteOffset, int ch)
70 {
71 std::string newText;
72 std::string::iterator cut;
73 int newOffset;
74
75 // make a temp string from left part of the caret (+6 extra chars)
76 newText = text.substr(0, byteOffset) + " ";
77 // append character
78 utf8::append(ch, newText.begin() + byteOffset);
79 // calculate newText real length
80 cut = newText.begin() + byteOffset;
81 utf8::next(cut, newText.end());
82 // cut the string to real length
83 newText = std::string(newText.begin(), cut);
84 newOffset = newText.size();
85 // make new text
86 text = newText + text.substr(byteOffset);
87
88 return newOffset;
89 }
90
91 int UTF8StringEditor::countChars(const std::string & text, int byteOffset)
92 {
93 return utf8::distance(text.begin(), text.begin() + byteOffset);
94 }
95
96 int UTF8StringEditor::getOffset(const std::string & text, int charIndex)
97 {
98 std::string::const_iterator cur, end;
99 int bytes = 0, i;
100
101 if (charIndex < 0) return 0;
102
103 cur = text.begin();
104 end = text.end();
105
106 for(i = 0; i < charIndex && cur != end; i++) {
107 utf8::next(cur, end);
108 }
109
110 return std::string(text.begin(), cur).size();
111 }
112 };
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