summaryrefslogtreecommitdiff
path: root/include/comphelper/accessibletexthelper.hxx
blob: e522448132cd684fd3d74c5776f8aa465bf23d1c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
/* -*- 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 <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:
        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( const OUString& rText, sal_Int32 nIndex );
        static OUString                  implGetTextRange( const OUString& rTest, 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( css::i18n::Boundary& rBoundary, sal_Int32 nIndex );
        bool                             implGetWordBoundary( css::i18n::Boundary& rBoundary, sal_Int32 nIndex );
        void                             implGetSentenceBoundary( css::i18n::Boundary& rBoundary, sal_Int32 nIndex );
        virtual void                     implGetParagraphBoundary( css::i18n::Boundary& rBoundary, sal_Int32 nIndex );
        virtual void                     implGetLineBoundary( css::i18n::Boundary& rBoundary, sal_Int32 nIndex );

        /** non-virtual versions of the methods

            @throws css::lang::IndexOutOfBoundsException
            @throws css::uno::RuntimeException
        */
        OUString SAL_CALL getSelectedText();
        /// @throws css::uno::RuntimeException
        sal_Int32 SAL_CALL getSelectionStart();
        /// @throws css::uno::RuntimeException
        sal_Int32 SAL_CALL getSelectionEnd();
        /// @throws css::lang::IndexOutOfBoundsException
        /// @throws css::lang::IllegalArgumentException
        /// @throws css::uno::RuntimeException
        css::accessibility::TextSegment SAL_CALL getTextAtIndex( sal_Int32 nIndex, sal_Int16 aTextType );
        /// @throws css::lang::IndexOutOfBoundsException
        /// @throws css::lang::IllegalArgumentException
        /// @throws css::uno::RuntimeException
        css::accessibility::TextSegment SAL_CALL getTextBeforeIndex( sal_Int32 nIndex, sal_Int16 aTextType );
        /// @throws css::lang::IndexOutOfBoundsException
        /// @throws css::lang::IllegalArgumentException
        /// @throws css::uno::RuntimeException
        css::accessibility::TextSegment SAL_CALL 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(
            const OUString& rOldString,
            const OUString& 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


#endif // INCLUDED_COMPHELPER_ACCESSIBLETEXTHELPER_HXX


//  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


/* vim:set shiftwidth=4 softtabstop=4 expandtab: */