Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 176 insertions, 0 deletions

diff --git a/include/comphelper/accessibletexthelper.hxx b/include/comphelper/accessibletexthelper.hxx
new file mode 100644
index 000000000..607004aee
--- /dev/null
+++ b/include/comphelper/accessibletexthelper.hxx
@@ -0,0 +1,176 @@
+/* -*- 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 INCLUDED_COMPHELPER_ACCESSIBLETEXTHELPER_HXX
+#define INCLUDED_COMPHELPER_ACCESSIBLETEXTHELPER_HXX
+
+#include <com/sun/star/accessibility/XAccessibleText.hpp>
+#include <com/sun/star/accessibility/TextSegment.hpp>
+#include <comphelper/accessiblecomponenthelper.hxx>
+#include <cppuhelper/implbase1.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::i18n { class XBreakIterator; }
+namespace com::sun::star::i18n { class XCharacterClassification; }
+namespace com::sun::star::i18n { struct Boundary; }
+
+namespace comphelper
+{
+
+
+    // OCommonAccessibleText
+
+    /** base class encapsulating common functionality for the helper classes implementing
+        the XAccessibleText
+    */
+    class COMPHELPER_DLLPUBLIC OCommonAccessibleText
+    {
+    private:
+        css::uno::Reference < css::i18n::XBreakIterator >             m_xBreakIter;
+        css::uno::Reference < css::i18n::XCharacterClassification >   m_xCharClass;
+
+    protected:
+        OCommonAccessibleText();
+        virtual ~OCommonAccessibleText();
+
+        css::uno::Reference < css::i18n::XBreakIterator > const &            implGetBreakIterator();
+        css::uno::Reference < css::i18n::XCharacterClassification > const &  implGetCharacterClassification();
+        static bool                      implIsValidBoundary( css::i18n::Boundary const & rBoundary, sal_Int32 nLength );
+        static bool                      implIsValidIndex( sal_Int32 nIndex, sal_Int32 nLength );
+        static bool                      implIsValidRange( sal_Int32 nStartIndex, sal_Int32 nEndIndex, sal_Int32 nLength );
+        static sal_Unicode               implGetCharacter( std::u16string_view rText, sal_Int32 nIndex );
+        static OUString                  implGetTextRange( std::u16string_view rText, sal_Int32 nStartIndex, sal_Int32 nEndIndex );
+        virtual OUString                 implGetText() = 0;
+        virtual css::lang::Locale        implGetLocale() = 0;
+        virtual void                     implGetSelection( sal_Int32& nStartIndex, sal_Int32& nEndIndex ) = 0;
+        void                             implGetGlyphBoundary( const OUString& rText, css::i18n::Boundary& rBoundary, sal_Int32 nIndex );
+        bool                             implGetWordBoundary( const OUString& rText, css::i18n::Boundary& rBoundary, sal_Int32 nIndex );
+        void                             implGetSentenceBoundary( const OUString& rText, css::i18n::Boundary& rBoundary, sal_Int32 nIndex );
+        virtual void                     implGetParagraphBoundary( const OUString& rText, css::i18n::Boundary& rBoundary, sal_Int32 nIndex );
+        virtual void                     implGetLineBoundary( const OUString& rText, css::i18n::Boundary& rBoundary, sal_Int32 nIndex );
+
+        /** non-virtual versions of the methods
+
+            @throws css::lang::IndexOutOfBoundsException
+            @throws css::uno::RuntimeException
+        */
+        OUString getSelectedText();
+        /// @throws css::uno::RuntimeException
+        sal_Int32 getSelectionStart();
+        /// @throws css::uno::RuntimeException
+        sal_Int32 getSelectionEnd();
+        /// @throws css::lang::IndexOutOfBoundsException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::uno::RuntimeException
+        css::accessibility::TextSegment getTextAtIndex( sal_Int32 nIndex, sal_Int16 aTextType );
+        /// @throws css::lang::IndexOutOfBoundsException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::uno::RuntimeException
+        css::accessibility::TextSegment getTextBeforeIndex( sal_Int32 nIndex, sal_Int16 aTextType );
+        /// @throws css::lang::IndexOutOfBoundsException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::uno::RuntimeException
+        css::accessibility::TextSegment getTextBehindIndex( sal_Int32 nIndex, sal_Int16 aTextType );
+
+    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 css::accessibility::AccessibleEventId
+                 css::accessibility::TextSegment
+        */
+        static bool implInitTextChangedEvent(
+            std::u16string_view rOldString,
+            std::u16string_view rNewString,
+            /*out*/ css::uno::Any& rDeleted,
+            /*out*/ css::uno::Any& rInserted); // throw()
+    };
+
+
+    // OAccessibleTextHelper
+
+
+    typedef ::cppu::ImplHelper1 <   css::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:
+        OAccessibleTextHelper();
+
+    public:
+        // XInterface
+        DECLARE_XINTERFACE( )
+
+        // XTypeProvider
+        DECLARE_XTYPEPROVIDER( )
+
+        // XAccessibleText
+        virtual OUString SAL_CALL getSelectedText() override;
+        virtual sal_Int32 SAL_CALL getSelectionStart() override;
+        virtual sal_Int32 SAL_CALL getSelectionEnd() override;
+        virtual css::accessibility::TextSegment SAL_CALL getTextAtIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override;
+        virtual css::accessibility::TextSegment SAL_CALL getTextBeforeIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override;
+        virtual css::accessibility::TextSegment SAL_CALL getTextBehindIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override;
+    };
+
+
+}   // namespace comphelper
+
+
+//  OAccessibleTextHelper is a helper class for implementing the
+//  XAccessibleText interface.
+
+//  The following methods have a default implementation:
+
+//      getCharacter
+//      getSelectedText
+//      getSelectionStart
+//      getSelectionEnd
+//      getTextRange
+//      getTextAtIndex
+//      getTextBeforeIndex
+//      getTextBehindIndex
+
+//  The following methods must be overridden by derived classes:
+
+//      implGetText
+//      implGetLocale
+//      implGetSelection
+//      getCaretPosition
+//      setCaretPosition
+//      getCharacterAttributes
+//      getCharacterBounds
+//      getIndexAtPoint
+//      setSelection
+//      copyText
+
+#endif // INCLUDED_COMPHELPER_ACCESSIBLETEXTHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */