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Diffstat (limited to 'comphelper/source/misc/accessibletexthelper.cxx')
| -rw-r--r-- | comphelper/source/misc/accessibletexthelper.cxx | 916 |
1 files changed, 916 insertions, 0 deletions
diff --git a/comphelper/source/misc/accessibletexthelper.cxx b/comphelper/source/misc/accessibletexthelper.cxx new file mode 100644 index 000000000000..d344192e7b46 --- /dev/null +++ b/comphelper/source/misc/accessibletexthelper.cxx @@ -0,0 +1,916 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +// MARKER(update_precomp.py): autogen include statement, do not remove +#include "precompiled_comphelper.hxx" + +// includes -------------------------------------------------------------- +#include <comphelper/accessibletexthelper.hxx> +#include <com/sun/star/accessibility/AccessibleTextType.hpp> +#include <com/sun/star/i18n/CharacterIteratorMode.hpp> +#include <com/sun/star/i18n/WordType.hpp> +#include <com/sun/star/i18n/KCharacterType.hpp> +#include <comphelper/processfactory.hxx> +#include <com/sun/star/accessibility/TextSegment.hpp> + +#include <algorithm> + +//.............................................................................. +namespace comphelper +{ +//.............................................................................. + + using namespace ::com::sun::star; + using namespace ::com::sun::star::uno; + using namespace ::com::sun::star::lang; + using namespace ::com::sun::star::beans; + using namespace ::com::sun::star::accessibility; + + //============================================================================== + // OCommonAccessibleText + //============================================================================== + + OCommonAccessibleText::OCommonAccessibleText() + { + } + + // ----------------------------------------------------------------------------- + + OCommonAccessibleText::~OCommonAccessibleText() + { + } + + // ----------------------------------------------------------------------------- + + Reference < i18n::XBreakIterator > OCommonAccessibleText::implGetBreakIterator() + { + if ( !m_xBreakIter.is() ) + { + Reference< lang::XMultiServiceFactory > xMSF = ::comphelper::getProcessServiceFactory(); + if ( xMSF.is() ) + { + m_xBreakIter = Reference< i18n::XBreakIterator > + ( xMSF->createInstance( ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM( "com.sun.star.i18n.BreakIterator" ) ) ), UNO_QUERY ); + } + } + + return m_xBreakIter; + } + + // ----------------------------------------------------------------------------- + + Reference < i18n::XCharacterClassification > OCommonAccessibleText::implGetCharacterClassification() + { + if ( !m_xCharClass.is() ) + { + Reference< lang::XMultiServiceFactory > xMSF = ::comphelper::getProcessServiceFactory(); + if ( xMSF.is() ) + { + m_xCharClass = Reference< i18n::XCharacterClassification > + ( xMSF->createInstance( ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM( "com.sun.star.i18n.CharacterClassification" ) ) ), UNO_QUERY ); + } + } + + return m_xCharClass; + } + + // ----------------------------------------------------------------------------- + + sal_Bool OCommonAccessibleText::implIsValidBoundary( i18n::Boundary& rBoundary, sal_Int32 nLength ) + { + return ( rBoundary.startPos >= 0 ) && ( rBoundary.startPos < nLength ) && ( rBoundary.endPos >= 0 ) && ( rBoundary.endPos <= nLength ); + } + + // ----------------------------------------------------------------------------- + + sal_Bool OCommonAccessibleText::implIsValidIndex( sal_Int32 nIndex, sal_Int32 nLength ) + { + return ( nIndex >= 0 ) && ( nIndex < nLength ); + } + + // ----------------------------------------------------------------------------- + + sal_Bool OCommonAccessibleText::implIsValidRange( sal_Int32 nStartIndex, sal_Int32 nEndIndex, sal_Int32 nLength ) + { + return ( nStartIndex >= 0 ) && ( nStartIndex <= nLength ) && ( nEndIndex >= 0 ) && ( nEndIndex <= nLength ); + } + + // ----------------------------------------------------------------------------- + + void OCommonAccessibleText::implGetGlyphBoundary( i18n::Boundary& rBoundary, sal_Int32 nIndex ) + { + ::rtl::OUString sText( implGetText() ); + + if ( implIsValidIndex( nIndex, sText.getLength() ) ) + { + Reference < i18n::XBreakIterator > xBreakIter = implGetBreakIterator(); + if ( xBreakIter.is() ) + { + sal_Int32 nCount = 1; + sal_Int32 nDone; + sal_Int32 nStartIndex = xBreakIter->previousCharacters( sText, nIndex, implGetLocale(), i18n::CharacterIteratorMode::SKIPCELL, nCount, nDone ); + if ( nDone != 0 ) + nStartIndex = xBreakIter->nextCharacters( sText, nStartIndex, implGetLocale(), i18n::CharacterIteratorMode::SKIPCELL, nCount, nDone ); + sal_Int32 nEndIndex = xBreakIter->nextCharacters( sText, nStartIndex, implGetLocale(), i18n::CharacterIteratorMode::SKIPCELL, nCount, nDone ); + if ( nDone != 0 ) + { + rBoundary.startPos = nStartIndex; + rBoundary.endPos = nEndIndex; + } + } + } + else + { + rBoundary.startPos = nIndex; + rBoundary.endPos = nIndex; + } + } + + // ----------------------------------------------------------------------------- + + sal_Bool OCommonAccessibleText::implGetWordBoundary( i18n::Boundary& rBoundary, sal_Int32 nIndex ) + { + sal_Bool bWord = sal_False; + ::rtl::OUString sText( implGetText() ); + + if ( implIsValidIndex( nIndex, sText.getLength() ) ) + { + Reference < i18n::XBreakIterator > xBreakIter = implGetBreakIterator(); + if ( xBreakIter.is() ) + { + rBoundary = xBreakIter->getWordBoundary( sText, nIndex, implGetLocale(), i18n::WordType::ANY_WORD, sal_True ); + + // it's a word, if the first character is an alpha-numeric character + Reference< i18n::XCharacterClassification > xCharClass = implGetCharacterClassification(); + if ( xCharClass.is() ) + { + sal_Int32 nType = xCharClass->getCharacterType( sText, rBoundary.startPos, implGetLocale() ); + if ( ( nType & ( i18n::KCharacterType::LETTER | i18n::KCharacterType::DIGIT ) ) != 0 ) + bWord = sal_True; + } + } + } + else + { + rBoundary.startPos = nIndex; + rBoundary.endPos = nIndex; + } + + return bWord; + } + + // ----------------------------------------------------------------------------- + + void OCommonAccessibleText::implGetSentenceBoundary( i18n::Boundary& rBoundary, sal_Int32 nIndex ) + { + ::rtl::OUString sText( implGetText() ); + + if ( implIsValidIndex( nIndex, sText.getLength() ) ) + { + Locale aLocale = implGetLocale(); + Reference < i18n::XBreakIterator > xBreakIter = implGetBreakIterator(); + if ( xBreakIter.is() ) + { + rBoundary.endPos = xBreakIter->endOfSentence( sText, nIndex, aLocale ); + rBoundary.startPos = xBreakIter->beginOfSentence( sText, rBoundary.endPos, aLocale ); + } + } + else + { + rBoundary.startPos = nIndex; + rBoundary.endPos = nIndex; + } + } + + // ----------------------------------------------------------------------------- + + void OCommonAccessibleText::implGetParagraphBoundary( i18n::Boundary& rBoundary, sal_Int32 nIndex ) + { + ::rtl::OUString sText( implGetText() ); + + if ( implIsValidIndex( nIndex, sText.getLength() ) ) + { + rBoundary.startPos = 0; + rBoundary.endPos = sText.getLength(); + + sal_Int32 nFound = sText.lastIndexOf( (sal_Unicode)'\n', nIndex ); + if ( nFound != -1 ) + rBoundary.startPos = nFound + 1; + + nFound = sText.indexOf( (sal_Unicode)'\n', nIndex ); + if ( nFound != -1 ) + rBoundary.endPos = nFound + 1; + } + else + { + rBoundary.startPos = nIndex; + rBoundary.endPos = nIndex; + } + } + + // ----------------------------------------------------------------------------- + + void OCommonAccessibleText::implGetLineBoundary( i18n::Boundary& rBoundary, sal_Int32 nIndex ) + { + ::rtl::OUString sText( implGetText() ); + sal_Int32 nLength = sText.getLength(); + + if ( implIsValidIndex( nIndex, nLength ) || nIndex == nLength ) + { + rBoundary.startPos = 0; + rBoundary.endPos = nLength; + } + else + { + rBoundary.startPos = nIndex; + rBoundary.endPos = nIndex; + } + } + + // ----------------------------------------------------------------------------- + + sal_Unicode OCommonAccessibleText::getCharacter( sal_Int32 nIndex ) throw (IndexOutOfBoundsException, RuntimeException) + { + ::rtl::OUString sText( implGetText() ); + + if ( !implIsValidIndex( nIndex, sText.getLength() ) ) + throw IndexOutOfBoundsException(); + + return sText.getStr()[nIndex]; + } + + // ----------------------------------------------------------------------------- + + sal_Int32 OCommonAccessibleText::getCharacterCount() throw (RuntimeException) + { + return implGetText().getLength(); + } + + // ----------------------------------------------------------------------------- + + ::rtl::OUString OCommonAccessibleText::getSelectedText() throw (RuntimeException) + { + ::rtl::OUString sText; + sal_Int32 nStartIndex; + sal_Int32 nEndIndex; + + implGetSelection( nStartIndex, nEndIndex ); + + try + { + sText = getTextRange( nStartIndex, nEndIndex ); + } + catch ( IndexOutOfBoundsException& ) + { + } + + return sText; + } + + // ----------------------------------------------------------------------------- + + sal_Int32 OCommonAccessibleText::getSelectionStart() throw (RuntimeException) + { + sal_Int32 nStartIndex; + sal_Int32 nEndIndex; + + implGetSelection( nStartIndex, nEndIndex ); + + return nStartIndex; + } + + // ----------------------------------------------------------------------------- + + sal_Int32 OCommonAccessibleText::getSelectionEnd() throw (RuntimeException) + { + sal_Int32 nStartIndex; + sal_Int32 nEndIndex; + + implGetSelection( nStartIndex, nEndIndex ); + + return nEndIndex; + } + + // ----------------------------------------------------------------------------- + + ::rtl::OUString OCommonAccessibleText::getText() throw (RuntimeException) + { + return implGetText(); + } + + // ----------------------------------------------------------------------------- + + ::rtl::OUString OCommonAccessibleText::getTextRange( sal_Int32 nStartIndex, sal_Int32 nEndIndex ) throw (IndexOutOfBoundsException, RuntimeException) + { + ::rtl::OUString sText( implGetText() ); + + if ( !implIsValidRange( nStartIndex, nEndIndex, sText.getLength() ) ) + throw IndexOutOfBoundsException(); + + sal_Int32 nMinIndex = ::std::min( nStartIndex, nEndIndex ); + sal_Int32 nMaxIndex = ::std::max( nStartIndex, nEndIndex ); + + return sText.copy( nMinIndex, nMaxIndex - nMinIndex ); + } + + // ----------------------------------------------------------------------------- + + TextSegment OCommonAccessibleText::getTextAtIndex( sal_Int32 nIndex, sal_Int16 aTextType ) throw (IndexOutOfBoundsException, IllegalArgumentException, RuntimeException) + { + ::rtl::OUString sText( implGetText() ); + sal_Int32 nLength = sText.getLength(); + + if ( !implIsValidIndex( nIndex, nLength ) && nIndex != nLength ) + throw IndexOutOfBoundsException(); + + i18n::Boundary aBoundary; + TextSegment aResult; + aResult.SegmentStart = -1; + aResult.SegmentEnd = -1; + + switch ( aTextType ) + { + case AccessibleTextType::CHARACTER: + { + if ( implIsValidIndex( nIndex, nLength ) ) + { + aResult.SegmentText = sText.copy( nIndex, 1 ); + aResult.SegmentStart = nIndex; + aResult.SegmentEnd = nIndex+1; + } + } + break; + case AccessibleTextType::GLYPH: + { + // get glyph at index + implGetGlyphBoundary( aBoundary, nIndex ); + if ( implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + break; + case AccessibleTextType::WORD: + { + // get word at index + sal_Bool bWord = implGetWordBoundary( aBoundary, nIndex ); + if ( bWord && implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + break; + case AccessibleTextType::SENTENCE: + { + // get sentence at index + implGetSentenceBoundary( aBoundary, nIndex ); + if ( implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + break; + case AccessibleTextType::PARAGRAPH: + { + // get paragraph at index + implGetParagraphBoundary( aBoundary, nIndex ); + if ( implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + break; + case AccessibleTextType::LINE: + { + // get line at index + implGetLineBoundary( aBoundary, nIndex ); + if ( implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + break; + case AccessibleTextType::ATTRIBUTE_RUN: + { + // TODO: implGetAttributeRunBoundary() (incompatible!) + + aResult.SegmentText = sText; + aResult.SegmentStart = 0; + aResult.SegmentEnd = nLength; + } + break; + default: + { + // unknown text type + } + } + + return aResult; + } + + // ----------------------------------------------------------------------------- + + TextSegment OCommonAccessibleText::getTextBeforeIndex( sal_Int32 nIndex, sal_Int16 aTextType ) throw (IndexOutOfBoundsException, IllegalArgumentException, RuntimeException) + { + ::rtl::OUString sText( implGetText() ); + sal_Int32 nLength = sText.getLength(); + + if ( !implIsValidIndex( nIndex, nLength ) && nIndex != nLength ) + throw IndexOutOfBoundsException(); + + i18n::Boundary aBoundary; + TextSegment aResult; + aResult.SegmentStart = -1; + aResult.SegmentEnd = -1; + + switch ( aTextType ) + { + case AccessibleTextType::CHARACTER: + { + if ( implIsValidIndex( nIndex - 1, nLength ) ) + { + aResult.SegmentText = sText.copy( nIndex - 1, 1 ); + aResult.SegmentStart = nIndex-1; + aResult.SegmentEnd = nIndex; + } + } + break; + case AccessibleTextType::GLYPH: + { + // get glyph at index + implGetGlyphBoundary( aBoundary, nIndex ); + // get previous glyph + if ( aBoundary.startPos > 0 ) + { + implGetGlyphBoundary( aBoundary, aBoundary.startPos - 1 ); + if ( implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + } + break; + case AccessibleTextType::WORD: + { + // get word at index + implGetWordBoundary( aBoundary, nIndex ); + // get previous word + sal_Bool bWord = sal_False; + while ( !bWord && aBoundary.startPos > 0 ) + bWord = implGetWordBoundary( aBoundary, aBoundary.startPos - 1 ); + if ( bWord && implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + break; + case AccessibleTextType::SENTENCE: + { + // get sentence at index + implGetSentenceBoundary( aBoundary, nIndex ); + // get previous sentence + if ( aBoundary.startPos > 0 ) + { + implGetSentenceBoundary( aBoundary, aBoundary.startPos - 1 ); + if ( implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + } + break; + case AccessibleTextType::PARAGRAPH: + { + // get paragraph at index + implGetParagraphBoundary( aBoundary, nIndex ); + // get previous paragraph + if ( aBoundary.startPos > 0 ) + { + implGetParagraphBoundary( aBoundary, aBoundary.startPos - 1 ); + if ( implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + } + break; + case AccessibleTextType::LINE: + { + // get line at index + implGetLineBoundary( aBoundary, nIndex ); + // get previous line + if ( aBoundary.startPos > 0 ) + { + implGetLineBoundary( aBoundary, aBoundary.startPos - 1 ); + if ( implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + } + break; + case AccessibleTextType::ATTRIBUTE_RUN: + { + // TODO: implGetAttributeRunBoundary() (incompatible!) + } + break; + default: + { + // unknown text type + } + } + + return aResult; + } + + // ----------------------------------------------------------------------------- + + TextSegment OCommonAccessibleText::getTextBehindIndex( sal_Int32 nIndex, sal_Int16 aTextType ) throw (IndexOutOfBoundsException, IllegalArgumentException, RuntimeException) + { + ::rtl::OUString sText( implGetText() ); + sal_Int32 nLength = sText.getLength(); + + if ( !implIsValidIndex( nIndex, nLength ) && nIndex != nLength ) + throw IndexOutOfBoundsException(); + + i18n::Boundary aBoundary; + TextSegment aResult; + aResult.SegmentStart = -1; + aResult.SegmentEnd = -1; + + switch ( aTextType ) + { + case AccessibleTextType::CHARACTER: + { + if ( implIsValidIndex( nIndex + 1, nLength ) ) + { + aResult.SegmentText = sText.copy( nIndex + 1, 1 ); + aResult.SegmentStart = nIndex+1; + aResult.SegmentEnd = nIndex+2; + } + } + break; + case AccessibleTextType::GLYPH: + { + // get glyph at index + implGetGlyphBoundary( aBoundary, nIndex ); + // get next glyph + if ( aBoundary.endPos < nLength ) + { + implGetGlyphBoundary( aBoundary, aBoundary.endPos ); + if ( implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + } + break; + case AccessibleTextType::WORD: + { + // get word at index + implGetWordBoundary( aBoundary, nIndex ); + // get next word + sal_Bool bWord = sal_False; + while ( !bWord && aBoundary.endPos < nLength ) + bWord = implGetWordBoundary( aBoundary, aBoundary.endPos ); + if ( bWord && implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + break; + case AccessibleTextType::SENTENCE: + { + // get sentence at index + implGetSentenceBoundary( aBoundary, nIndex ); + // get next sentence + sal_Int32 nEnd = aBoundary.endPos; + sal_Int32 nI = aBoundary.endPos; + sal_Bool bFound = sal_False; + while ( !bFound && ++nI < nLength ) + { + implGetSentenceBoundary( aBoundary, nI ); + bFound = ( aBoundary.endPos > nEnd ); + } + if ( bFound && implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + break; + case AccessibleTextType::PARAGRAPH: + { + // get paragraph at index + implGetParagraphBoundary( aBoundary, nIndex ); + // get next paragraph + if ( aBoundary.endPos < nLength ) + { + implGetParagraphBoundary( aBoundary, aBoundary.endPos ); + if ( implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + } + break; + case AccessibleTextType::LINE: + { + // get line at index + implGetLineBoundary( aBoundary, nIndex ); + // get next line + if ( aBoundary.endPos < nLength ) + { + implGetLineBoundary( aBoundary, aBoundary.endPos ); + if ( implIsValidBoundary( aBoundary, nLength ) ) + { + aResult.SegmentText = sText.copy( aBoundary.startPos, aBoundary.endPos - aBoundary.startPos ); + aResult.SegmentStart = aBoundary.startPos; + aResult.SegmentEnd = aBoundary.endPos; + } + } + } + break; + case AccessibleTextType::ATTRIBUTE_RUN: + { + // TODO: implGetAttributeRunBoundary() (incompatible!) + } + break; + default: + { + // unknown text type + } + } + + return aResult; + } + + // ----------------------------------------------------------------------------- + bool OCommonAccessibleText::implInitTextChangedEvent( + const rtl::OUString& rOldString, + const rtl::OUString& rNewString, + ::com::sun::star::uno::Any& rDeleted, + ::com::sun::star::uno::Any& rInserted) // throw() + { + sal_uInt32 nLenOld = rOldString.getLength(); + sal_uInt32 nLenNew = rNewString.getLength(); + + // equal + if ((0 == nLenOld) && (0 == nLenNew)) + return false; + + TextSegment aDeletedText; + TextSegment aInsertedText; + + aDeletedText.SegmentStart = -1; + aDeletedText.SegmentEnd = -1; + aInsertedText.SegmentStart = -1; + aInsertedText.SegmentEnd = -1; + + // insert only + if ((0 == nLenOld) && (nLenNew > 0)) + { + aInsertedText.SegmentStart = 0; + aInsertedText.SegmentEnd = nLenNew; + aInsertedText.SegmentText = rNewString.copy( aInsertedText.SegmentStart, aInsertedText.SegmentEnd - aInsertedText.SegmentStart ); + + rInserted <<= aInsertedText; + return true; + } + + // delete only + if ((nLenOld > 0) && (0 == nLenNew)) + { + aDeletedText.SegmentStart = 0; + aDeletedText.SegmentEnd = nLenOld; + aDeletedText.SegmentText = rOldString.copy( aDeletedText.SegmentStart, aDeletedText.SegmentEnd - aDeletedText.SegmentStart ); + + rDeleted <<= aDeletedText; + return true; + } + + const sal_Unicode* pFirstDiffOld = rOldString.getStr(); + const sal_Unicode* pLastDiffOld = rOldString.getStr() + nLenOld; + const sal_Unicode* pFirstDiffNew = rNewString.getStr(); + const sal_Unicode* pLastDiffNew = rNewString.getStr() + nLenNew; + + // find first difference + while ((*pFirstDiffOld == *pFirstDiffNew) && + (pFirstDiffOld < pLastDiffOld) && + (pFirstDiffNew < pLastDiffNew)) + { + pFirstDiffOld++; + pFirstDiffNew++; + } + + // equality test + if ((0 == *pFirstDiffOld) && (0 == *pFirstDiffNew)) + return false; + + // find last difference + while ( ( pLastDiffOld > pFirstDiffOld) && + ( pLastDiffNew > pFirstDiffNew) && + (pLastDiffOld[-1] == pLastDiffNew[-1])) + { + pLastDiffOld--; + pLastDiffNew--; + } + + if (pFirstDiffOld < pLastDiffOld) + { + aDeletedText.SegmentStart = pFirstDiffOld - rOldString.getStr(); + aDeletedText.SegmentEnd = pLastDiffOld - rOldString.getStr(); + aDeletedText.SegmentText = rOldString.copy( aDeletedText.SegmentStart, aDeletedText.SegmentEnd - aDeletedText.SegmentStart ); + + rDeleted <<= aDeletedText; + } + + if (pFirstDiffNew < pLastDiffNew) + { + aInsertedText.SegmentStart = pFirstDiffNew - rNewString.getStr(); + aInsertedText.SegmentEnd = pLastDiffNew - rNewString.getStr(); + aInsertedText.SegmentText = rNewString.copy( aInsertedText.SegmentStart, aInsertedText.SegmentEnd - aInsertedText.SegmentStart ); + + rInserted <<= aInsertedText; + } + return true; + } + + //============================================================================== + // OAccessibleTextHelper + //============================================================================== + + OAccessibleTextHelper::OAccessibleTextHelper() + { + } + + // ----------------------------------------------------------------------------- + + OAccessibleTextHelper::OAccessibleTextHelper( IMutex* _pExternalLock ) + :OAccessibleExtendedComponentHelper( _pExternalLock ) + { + } + + // ----------------------------------------------------------------------------- + // XInterface + // ----------------------------------------------------------------------------- + + IMPLEMENT_FORWARD_XINTERFACE2( OAccessibleTextHelper, OAccessibleExtendedComponentHelper, OAccessibleTextHelper_Base ) + + // ----------------------------------------------------------------------------- + // XTypeProvider + // ----------------------------------------------------------------------------- + + IMPLEMENT_FORWARD_XTYPEPROVIDER2( OAccessibleTextHelper, OAccessibleExtendedComponentHelper, OAccessibleTextHelper_Base ) + + // ----------------------------------------------------------------------------- + // XAccessibleText + // ----------------------------------------------------------------------------- + + sal_Unicode OAccessibleTextHelper::getCharacter( sal_Int32 nIndex ) throw (IndexOutOfBoundsException, RuntimeException) + { + OExternalLockGuard aGuard( this ); + + return OCommonAccessibleText::getCharacter( nIndex ); + } + + // ----------------------------------------------------------------------------- + + sal_Int32 OAccessibleTextHelper::getCharacterCount() throw (RuntimeException) + { + OExternalLockGuard aGuard( this ); + + return OCommonAccessibleText::getCharacterCount(); + } + + // ----------------------------------------------------------------------------- + + ::rtl::OUString OAccessibleTextHelper::getSelectedText() throw (RuntimeException) + { + OExternalLockGuard aGuard( this ); + + return OCommonAccessibleText::getSelectedText(); + } + + // ----------------------------------------------------------------------------- + + sal_Int32 OAccessibleTextHelper::getSelectionStart() throw (RuntimeException) + { + OExternalLockGuard aGuard( this ); + + return OCommonAccessibleText::getSelectionStart(); + } + + // ----------------------------------------------------------------------------- + + sal_Int32 OAccessibleTextHelper::getSelectionEnd() throw (RuntimeException) + { + OExternalLockGuard aGuard( this ); + + return OCommonAccessibleText::getSelectionEnd(); + } + + // ----------------------------------------------------------------------------- + + ::rtl::OUString OAccessibleTextHelper::getText() throw (RuntimeException) + { + OExternalLockGuard aGuard( this ); + + return OCommonAccessibleText::getText(); + } + + // ----------------------------------------------------------------------------- + + ::rtl::OUString OAccessibleTextHelper::getTextRange( sal_Int32 nStartIndex, sal_Int32 nEndIndex ) throw (IndexOutOfBoundsException, RuntimeException) + { + OExternalLockGuard aGuard( this ); + + return OCommonAccessibleText::getTextRange( nStartIndex, nEndIndex ); + } + + // ----------------------------------------------------------------------------- + + TextSegment OAccessibleTextHelper::getTextAtIndex( sal_Int32 nIndex, sal_Int16 aTextType ) throw (IndexOutOfBoundsException, IllegalArgumentException, RuntimeException) + { + OExternalLockGuard aGuard( this ); + + return OCommonAccessibleText::getTextAtIndex( nIndex, aTextType ); + } + + // ----------------------------------------------------------------------------- + + TextSegment OAccessibleTextHelper::getTextBeforeIndex( sal_Int32 nIndex, sal_Int16 aTextType ) throw (IndexOutOfBoundsException, IllegalArgumentException, RuntimeException) + { + OExternalLockGuard aGuard( this ); + + return OCommonAccessibleText::getTextBeforeIndex( nIndex, aTextType ); + } + + // ----------------------------------------------------------------------------- + + TextSegment OAccessibleTextHelper::getTextBehindIndex( sal_Int32 nIndex, sal_Int16 aTextType ) throw (IndexOutOfBoundsException, IllegalArgumentException, RuntimeException) + { + OExternalLockGuard aGuard( this ); + + return OCommonAccessibleText::getTextBehindIndex( nIndex, aTextType ); + } + + // ----------------------------------------------------------------------------- + +//.............................................................................. +} // namespace comphelper +//.............................................................................. + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |