LibreOffice Module sw (master)  1
breakit.cxx
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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.
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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:
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11  * Licensed to the Apache Software Foundation (ASF) under one or more
12  * contributor license agreements. See the NOTICE file distributed
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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 <breakit.hxx>
21 #include <swtypes.hxx>
22 
23 #include <com/sun/star/i18n/ScriptType.hpp>
24 #include <com/sun/star/i18n/CharacterIteratorMode.hpp>
25 #include <com/sun/star/i18n/BreakIterator.hpp>
26 #include <editeng/unolingu.hxx>
28 #include <unicode/uchar.h>
30 #include <algorithm>
31 
32 using namespace com::sun::star;
33 
34 SwBreakIt* g_pBreakIt = nullptr;
35 
36 void SwBreakIt::Create_( const uno::Reference<uno::XComponentContext> & rxContext )
37 {
38  delete g_pBreakIt;
39  g_pBreakIt = new SwBreakIt( rxContext );
40 }
41 
43 {
44  delete g_pBreakIt;
45  g_pBreakIt = nullptr;
46 }
47 
49 {
50  return g_pBreakIt;
51 }
52 
53 SwBreakIt::SwBreakIt( const uno::Reference<uno::XComponentContext> & rxContext )
54  : m_xContext(rxContext)
55  , m_xBreak(i18n::BreakIterator::create(m_xContext))
56  , m_aForbiddenLang(LANGUAGE_DONTKNOW)
57 {
58 }
59 
61 {
62  if (m_xLanguageTag)
63  m_xLanguageTag->reset(aLang);
64  else
65  m_xLanguageTag.reset(new LanguageTag(aLang));
66 }
67 
68 void SwBreakIt::GetLocale_( const LanguageTag& rLanguageTag )
69 {
70  if (m_xLanguageTag)
71  *m_xLanguageTag = rLanguageTag;
72  else
73  m_xLanguageTag.reset(new LanguageTag(rLanguageTag));
74 }
75 
77 {
79 
80  m_aForbiddenLang = aLang;
81  m_xForbidden.reset(new i18n::ForbiddenCharacters(aWrap.getForbiddenCharacters()));
82 }
83 
84 sal_uInt16 SwBreakIt::GetRealScriptOfText( const OUString& rText, sal_Int32 nPos ) const
85 {
86  sal_uInt16 nScript = i18n::ScriptType::WEAK;
87  if (!rText.isEmpty())
88  {
89  if( nPos && nPos == rText.getLength() )
90  --nPos;
91  else if( nPos < 0)
92  nPos = 0;
93 
94  nScript = m_xBreak->getScriptType(rText, nPos);
95  sal_Int32 nChgPos = 0;
96  if (i18n::ScriptType::WEAK == nScript && nPos >= 0 && nPos + 1 < rText.getLength())
97  {
98  // A weak character followed by a mark may be meant to combine with
99  // the mark, so prefer the following character's script
100  switch (u_charType(rText[nPos + 1]))
101  {
102  case U_NON_SPACING_MARK:
103  case U_ENCLOSING_MARK:
104  case U_COMBINING_SPACING_MARK:
105  nScript = m_xBreak->getScriptType(rText, nPos+1);
106  break;
107  }
108  }
109  if( i18n::ScriptType::WEAK == nScript &&
110  nPos &&
111  0 < ( nChgPos = m_xBreak->beginOfScript(rText, nPos, nScript) ) )
112  {
113  nScript = m_xBreak->getScriptType(rText, nChgPos-1);
114  }
115 
116  if( i18n::ScriptType::WEAK == nScript &&
117  rText.getLength() > ( nChgPos = m_xBreak->endOfScript(rText, nPos, nScript) ) &&
118  0 <= nChgPos )
119  {
120  nScript = m_xBreak->getScriptType(rText, nChgPos);
121  }
122  }
123  if( i18n::ScriptType::WEAK == nScript )
125  return nScript;
126 }
127 
128 SvtScriptType SwBreakIt::GetAllScriptsOfText( const OUString& rText ) const
129 {
130  const SvtScriptType coAllScripts = SvtScriptType::LATIN |
131  SvtScriptType::ASIAN |
132  SvtScriptType::COMPLEX;
133  SvtScriptType nRet = SvtScriptType::NONE;
134  sal_uInt16 nScript = 0;
135  if (!rText.isEmpty())
136  {
137  for( sal_Int32 n = 0, nEnd = rText.getLength(); n < nEnd;
138  n = m_xBreak->endOfScript(rText, n, nScript) )
139  {
140  nScript = m_xBreak->getScriptType(rText, n);
141  switch( nScript )
142  {
143  case i18n::ScriptType::LATIN: nRet |= SvtScriptType::LATIN; break;
144  case i18n::ScriptType::ASIAN: nRet |= SvtScriptType::ASIAN; break;
145  case i18n::ScriptType::COMPLEX: nRet |= SvtScriptType::COMPLEX; break;
146  case i18n::ScriptType::WEAK:
147  if( nRet == SvtScriptType::NONE )
148  nRet |= coAllScripts;
149  break;
150  }
151  if( coAllScripts == nRet )
152  break;
153  }
154  }
155  return nRet;
156 }
157 
158 sal_Int32 SwBreakIt::getGraphemeCount(const OUString& rText,
159  sal_Int32 nStart, sal_Int32 nEnd) const
160 {
161  sal_Int32 nGraphemeCount = 0;
162 
163  sal_Int32 nCurPos = std::max(static_cast<sal_Int32>(0), nStart);
164  while (nCurPos < nEnd)
165  {
166  // fdo#49208 cheat and assume that nothing can combine with a space
167  // to form a single grapheme
168  if (rText[nCurPos] == ' ')
169  {
170  ++nCurPos;
171  }
172  else
173  {
174  sal_Int32 nCount2 = 1;
175  nCurPos = m_xBreak->nextCharacters(rText, nCurPos, lang::Locale(),
176  i18n::CharacterIteratorMode::SKIPCELL, nCount2, nCount2);
177  }
178  ++nGraphemeCount;
179  }
180 
181  return nGraphemeCount;
182 }
183 
184 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
LanguageType m_aForbiddenLang
language of the current forbiddenChar struct
Definition: breakit.hxx:41
css::uno::Reference< css::uno::XComponentContext > m_xContext
Definition: breakit.hxx:35
void GetLocale_(const LanguageType aLang)
Definition: breakit.cxx:60
SvtScriptType GetAllScriptsOfText(const OUString &rText) const
Definition: breakit.cxx:128
css::i18n::ForbiddenCharacters getForbiddenCharacters() const
std::unique_ptr< LanguageTag > m_xLanguageTag
language tag of the current locale
Definition: breakit.hxx:38
static void Delete_()
Definition: breakit.cxx:42
sal_uInt16 GetRealScriptOfText(const OUString &rText, sal_Int32 nPos) const
Definition: breakit.cxx:84
const LanguageTag & GetLanguageTag(const LanguageType aLang)
Definition: breakit.hxx:85
sal_Int32 getGraphemeCount(const OUString &rStr, sal_Int32 nStart, sal_Int32 nEnd) const
Definition: breakit.cxx:158
SwBreakIt * g_pBreakIt
Definition: breakit.cxx:34
SwBreakIt(SwBreakIt const &)=delete
Reference< deployment::XPackageRegistry > create(Reference< deployment::XPackageRegistry > const &xRootRegistry, OUString const &context, OUString const &cachePath, Reference< XComponentContext > const &xComponentContext)
SvtScriptType
static sal_Int16 GetI18NScriptTypeOfLanguage(LanguageType nLang)
#define LANGUAGE_DONTKNOW
void GetForbidden_(const LanguageType aLang)
Definition: breakit.cxx:76
LanguageType GetAppLanguage()
Definition: init.cxx:760
css::uno::Reference< css::i18n::XBreakIterator > m_xBreak
Definition: breakit.hxx:36
std::unique_ptr< css::i18n::ForbiddenCharacters > m_xForbidden
Definition: breakit.hxx:39
static void Create_(const css::uno::Reference< css::uno::XComponentContext > &rxContext)
Definition: breakit.cxx:36
static SwBreakIt * Get()
Definition: breakit.cxx:48
const uno::Reference< uno::XComponentContext > m_xContext