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Diffstat (limited to 'include/comphelper/accessibletexthelper.hxx')
| -rw-r--r-- | include/comphelper/accessibletexthelper.hxx | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/include/comphelper/accessibletexthelper.hxx b/include/comphelper/accessibletexthelper.hxx new file mode 100644 index 000000000000..ea3f505ee7fe --- /dev/null +++ b/include/comphelper/accessibletexthelper.hxx @@ -0,0 +1,178 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#ifndef COMPHELPER_ACCESSIBLE_TEXT_HELPER_HXX +#define COMPHELPER_ACCESSIBLE_TEXT_HELPER_HXX + +#include <com/sun/star/accessibility/XAccessibleText.hpp> +#include <com/sun/star/accessibility/TextSegment.hpp> +#include <com/sun/star/i18n/XBreakIterator.hpp> +#include <com/sun/star/i18n/XCharacterClassification.hpp> +#include <comphelper/accessiblecomponenthelper.hxx> +#include <cppuhelper/implbase1.hxx> +#include "comphelper/comphelperdllapi.h" + + +//.............................................................................. +namespace comphelper +{ +//.............................................................................. + + //============================================================================== + // OCommonAccessibleText + //============================================================================== + /** base class encapsulating common functionality for the helper classes implementing + the XAccessibleText + */ + class COMPHELPER_DLLPUBLIC OCommonAccessibleText + { + private: + ::com::sun::star::uno::Reference < ::com::sun::star::i18n::XBreakIterator > m_xBreakIter; + ::com::sun::star::uno::Reference < ::com::sun::star::i18n::XCharacterClassification > m_xCharClass; + + protected: + OCommonAccessibleText(); + virtual ~OCommonAccessibleText(); + + ::com::sun::star::uno::Reference < ::com::sun::star::i18n::XBreakIterator > implGetBreakIterator(); + ::com::sun::star::uno::Reference < ::com::sun::star::i18n::XCharacterClassification > implGetCharacterClassification(); + sal_Bool implIsValidBoundary( ::com::sun::star::i18n::Boundary& rBoundary, sal_Int32 nLength ); + virtual sal_Bool implIsValidIndex( sal_Int32 nIndex, sal_Int32 nLength ); + virtual sal_Bool implIsValidRange( sal_Int32 nStartIndex, sal_Int32 nEndIndex, sal_Int32 nLength ); + virtual OUString implGetText() = 0; + virtual ::com::sun::star::lang::Locale implGetLocale() = 0; + virtual void implGetSelection( sal_Int32& nStartIndex, sal_Int32& nEndIndex ) = 0; + virtual void implGetGlyphBoundary( ::com::sun::star::i18n::Boundary& rBoundary, sal_Int32 nIndex ); + virtual sal_Bool implGetWordBoundary( ::com::sun::star::i18n::Boundary& rBoundary, sal_Int32 nIndex ); + virtual void implGetSentenceBoundary( ::com::sun::star::i18n::Boundary& rBoundary, sal_Int32 nIndex ); + virtual void implGetParagraphBoundary( ::com::sun::star::i18n::Boundary& rBoundary, sal_Int32 nIndex ); + virtual void implGetLineBoundary( ::com::sun::star::i18n::Boundary& rBoundary, sal_Int32 nIndex ); + + /** non-virtual versions of the methods + */ + sal_Unicode SAL_CALL getCharacter( sal_Int32 nIndex ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException); + sal_Int32 SAL_CALL getCharacterCount() throw (::com::sun::star::uno::RuntimeException); + OUString SAL_CALL getSelectedText() throw (::com::sun::star::uno::RuntimeException); + sal_Int32 SAL_CALL getSelectionStart() throw (::com::sun::star::uno::RuntimeException); + sal_Int32 SAL_CALL getSelectionEnd() throw (::com::sun::star::uno::RuntimeException); + OUString SAL_CALL getText() throw (::com::sun::star::uno::RuntimeException); + OUString SAL_CALL getTextRange( sal_Int32 nStartIndex, sal_Int32 nEndIndex ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException); + ::com::sun::star::accessibility::TextSegment SAL_CALL getTextAtIndex( sal_Int32 nIndex, sal_Int16 aTextType ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::uno::RuntimeException); + ::com::sun::star::accessibility::TextSegment SAL_CALL getTextBeforeIndex( sal_Int32 nIndex, sal_Int16 aTextType ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::uno::RuntimeException); + ::com::sun::star::accessibility::TextSegment SAL_CALL getTextBehindIndex( sal_Int32 nIndex, sal_Int16 aTextType ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::uno::RuntimeException); + + public: + + /** Helper method, that detects the difference between + two strings and returns the deleted selection and + the inserted selection if available. + + @returns true if there are differences between the + two strings and false if both are equal + + @see ::com::sun::star::accessibility::AccessibleEventId + ::com::sun::star::accessibility::TextSegment + */ + static bool implInitTextChangedEvent( + const OUString& rOldString, + const OUString& rNewString, + /*out*/ ::com::sun::star::uno::Any& rDeleted, + /*out*/ ::com::sun::star::uno::Any& rInserted); // throw() + }; + + + //============================================================================== + // OAccessibleTextHelper + //============================================================================== + + typedef ::cppu::ImplHelper1 < ::com::sun::star::accessibility::XAccessibleText + > OAccessibleTextHelper_Base; + + /** a helper class for implementing an AccessibleExtendedComponent which at the same time + supports an XAccessibleText interface + */ + class COMPHELPER_DLLPUBLIC OAccessibleTextHelper : public OAccessibleExtendedComponentHelper, + public OCommonAccessibleText, + public OAccessibleTextHelper_Base + { + protected: + // see the respective base class ctor for an extensive comment on this, please + OAccessibleTextHelper( IMutex* _pExternalLock ); + + public: + // XInterface + DECLARE_XINTERFACE( ) + + // XTypeProvider + DECLARE_XTYPEPROVIDER( ) + + // XAccessibleText + virtual sal_Unicode SAL_CALL getCharacter( sal_Int32 nIndex ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException); + virtual sal_Int32 SAL_CALL getCharacterCount() throw (::com::sun::star::uno::RuntimeException); + virtual OUString SAL_CALL getSelectedText() throw (::com::sun::star::uno::RuntimeException); + virtual sal_Int32 SAL_CALL getSelectionStart() throw (::com::sun::star::uno::RuntimeException); + virtual sal_Int32 SAL_CALL getSelectionEnd() throw (::com::sun::star::uno::RuntimeException); + virtual OUString SAL_CALL getText() throw (::com::sun::star::uno::RuntimeException); + virtual OUString SAL_CALL getTextRange( sal_Int32 nStartIndex, sal_Int32 nEndIndex ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException); + virtual ::com::sun::star::accessibility::TextSegment SAL_CALL getTextAtIndex( sal_Int32 nIndex, sal_Int16 aTextType ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::uno::RuntimeException); + virtual ::com::sun::star::accessibility::TextSegment SAL_CALL getTextBeforeIndex( sal_Int32 nIndex, sal_Int16 aTextType ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::uno::RuntimeException); + virtual ::com::sun::star::accessibility::TextSegment SAL_CALL getTextBehindIndex( sal_Int32 nIndex, sal_Int16 aTextType ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::uno::RuntimeException); + }; + +//.............................................................................. +} // namespace comphelper +//.............................................................................. + +#endif // COMPHELPER_ACCESSIBLE_TEXT_HELPER_HXX + + +// ----------------------------------------------------------------------------- +// +// OAccessibleTextHelper is a helper class for implementing the +// XAccessibleText interface. +// +// The following methods have a default implementation: +// +// getCharacter +// getCharacterCount +// getSelectedText +// getSelectionStart +// getSelectionEnd +// getText +// getTextRange +// getTextAtIndex +// getTextBeforeIndex +// getTextBehindIndex +// +// The following methods must be overriden by derived classes: +// +// implGetText +// implGetLocale +// implGetSelection +// getCaretPosition +// setCaretPosition +// getCharacterAttributes +// getCharacterBounds +// getIndexAtPoint +// setSelection +// copyText +// +// ----------------------------------------------------------------------------- + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |