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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #include <com/sun/star/i18n/CTLScriptType.hpp>
21 : #include <com/sun/star/i18n/ScriptDirection.hpp>
22 : #include <com/sun/star/i18n/UnicodeScript.hpp>
23 : #include <i18nutil/scripttypedetector.hxx>
24 : #include <i18nutil/unicode.hxx>
25 :
26 : using namespace com::sun::star::i18n;
27 :
28 : static sal_Int16 scriptDirection[] = {
29 : ScriptDirection::LEFT_TO_RIGHT, // DirectionProperty_LEFT_TO_RIGHT = 0,
30 : ScriptDirection::RIGHT_TO_LEFT, // DirectionProperty_RIGHT_TO_LEFT = 1,
31 : ScriptDirection::LEFT_TO_RIGHT, // DirectionProperty_EUROPEAN_NUMBER = 2,
32 : ScriptDirection::LEFT_TO_RIGHT, // DirectionProperty_EUROPEAN_NUMBER_SEPARATOR = 3,
33 : ScriptDirection::LEFT_TO_RIGHT, // DirectionProperty_EUROPEAN_NUMBER_TERMINATOR = 4,
34 : ScriptDirection::RIGHT_TO_LEFT, // DirectionProperty_ARABIC_NUMBER = 5,
35 : ScriptDirection::NEUTRAL, // DirectionProperty_COMMON_NUMBER_SEPARATOR = 6,
36 : ScriptDirection::NEUTRAL, // DirectionProperty_BLOCK_SEPARATOR = 7,
37 : ScriptDirection::NEUTRAL, // DirectionProperty_SEGMENT_SEPARATOR = 8,
38 : ScriptDirection::NEUTRAL, // DirectionProperty_WHITE_SPACE_NEUTRAL = 9,
39 : ScriptDirection::NEUTRAL, // DirectionProperty_OTHER_NEUTRAL = 10,
40 : ScriptDirection::LEFT_TO_RIGHT, // DirectionProperty_LEFT_TO_RIGHT_EMBEDDING = 11,
41 : ScriptDirection::LEFT_TO_RIGHT, // DirectionProperty_LEFT_TO_RIGHT_OVERRIDE = 12,
42 : ScriptDirection::RIGHT_TO_LEFT, // DirectionProperty_RIGHT_TO_LEFT_ARABIC = 13,
43 : ScriptDirection::RIGHT_TO_LEFT, // DirectionProperty_RIGHT_TO_LEFT_EMBEDDING = 14,
44 : ScriptDirection::RIGHT_TO_LEFT, // DirectionProperty_RIGHT_TO_LEFT_OVERRIDE = 15,
45 : ScriptDirection::NEUTRAL, // DirectionProperty_POP_DIRECTIONAL_FORMAT = 16,
46 : ScriptDirection::NEUTRAL, // DirectionProperty_DIR_NON_SPACING_MARK = 17,
47 : ScriptDirection::NEUTRAL, // DirectionProperty_BOUNDARY_NEUTRAL = 18,
48 : };
49 :
50 0 : sal_Int16 ScriptTypeDetector::getScriptDirection( const rtl::OUString& Text, sal_Int32 nPos, sal_Int16 defaultScriptDirection )
51 : {
52 0 : sal_Int16 dir = scriptDirection[unicode::getUnicodeDirection(Text[nPos])];
53 0 : return (dir == ScriptDirection::NEUTRAL) ? defaultScriptDirection : dir;
54 : }
55 :
56 : // return value '-1' means either the direction on nPos is not same as scriptDirection or nPos is out of range.
57 0 : sal_Int32 ScriptTypeDetector::beginOfScriptDirection( const rtl::OUString& Text, sal_Int32 nPos, sal_Int16 direction )
58 : {
59 0 : sal_Int32 cPos = nPos;
60 :
61 0 : if (cPos < Text.getLength()) {
62 0 : for (; cPos >= 0; cPos--) {
63 0 : if (direction != getScriptDirection(Text, cPos, direction))
64 0 : break;
65 : }
66 : }
67 0 : return cPos == nPos ? -1 : cPos + 1;
68 : }
69 :
70 0 : sal_Int32 ScriptTypeDetector::endOfScriptDirection( const rtl::OUString& Text, sal_Int32 nPos, sal_Int16 direction )
71 : {
72 0 : sal_Int32 cPos = nPos;
73 0 : sal_Int32 len = Text.getLength();
74 :
75 0 : if (cPos >=0) {
76 0 : for (; cPos < len; cPos++) {
77 0 : if (direction != getScriptDirection(Text, cPos, direction))
78 0 : break;
79 : }
80 : }
81 0 : return cPos == nPos ? -1 : cPos;
82 : }
83 :
84 46 : sal_Int16 ScriptTypeDetector::getCTLScriptType( const rtl::OUString& Text, sal_Int32 nPos )
85 : {
86 : static ScriptTypeList typeList[] = {
87 : { UnicodeScript_kHebrew, UnicodeScript_kHebrew, CTLScriptType::CTL_HEBREW }, // 10
88 : { UnicodeScript_kArabic, UnicodeScript_kArabic, CTLScriptType::CTL_ARABIC }, // 11
89 : { UnicodeScript_kDevanagari, UnicodeScript_kDevanagari, CTLScriptType::CTL_INDIC }, // 14
90 : { UnicodeScript_kThai, UnicodeScript_kThai, CTLScriptType::CTL_THAI }, // 24
91 : { UnicodeScript_kScriptCount, UnicodeScript_kScriptCount, CTLScriptType::CTL_UNKNOWN } // 88
92 : };
93 :
94 46 : return unicode::getUnicodeScriptType(Text[nPos], typeList, CTLScriptType::CTL_UNKNOWN);
95 : }
96 :
97 : // Begin of Script Type is inclusive.
98 0 : sal_Int32 ScriptTypeDetector::beginOfCTLScriptType( const rtl::OUString& Text, sal_Int32 nPos )
99 : {
100 0 : if (nPos < 0)
101 0 : return 0;
102 0 : else if (nPos >= Text.getLength())
103 0 : return Text.getLength();
104 : else {
105 0 : sal_Int16 cType = getCTLScriptType(Text, nPos);
106 0 : for (nPos--; nPos >= 0; nPos--) {
107 0 : if (cType != getCTLScriptType(Text, nPos))
108 0 : break;
109 : }
110 0 : return nPos + 1;
111 : }
112 : }
113 :
114 : // End of the Script Type is exclusive, the return value pointing to the begin of next script type
115 10 : sal_Int32 ScriptTypeDetector::endOfCTLScriptType( const rtl::OUString& Text, sal_Int32 nPos )
116 : {
117 10 : if (nPos < 0)
118 0 : return 0;
119 10 : else if (nPos >= Text.getLength())
120 0 : return Text.getLength();
121 : else {
122 10 : sal_Int16 cType = getCTLScriptType(Text, nPos);
123 10 : sal_Int32 len = Text.getLength();
124 30 : for (nPos++; nPos < len; nPos++) {
125 26 : if (cType != getCTLScriptType(Text, nPos))
126 6 : break;
127 : }
128 10 : return nPos;
129 : }
130 : }
131 :
132 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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