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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
/* -*- 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_EDITENG_ACCESSIBLESTATICTEXTBASE_HXX
#define INCLUDED_EDITENG_ACCESSIBLESTATICTEXTBASE_HXX
#include <memory>
#include <tools/gen.hxx>
#include <cppuhelper/implbase2.hxx>
#include <com/sun/star/uno/Reference.hxx>
#include <com/sun/star/accessibility/AccessibleScrollType.hpp>
#include <com/sun/star/accessibility/XAccessibleText.hpp>
#include <com/sun/star/accessibility/XAccessibleTextAttributes.hpp>
#include <com/sun/star/accessibility/TextSegment.hpp>
#include <editeng/AccessibleEditableTextPara.hxx>
#include <editeng/EPaM.hxx>
#include <editeng/editengdllapi.h>
#include <editeng/unoedprx.hxx>
namespace com::sun::star::accessibility { class XAccessible; }
class SvxEditSource;
namespace accessibility
{
typedef ::cppu::ImplHelper2<
css::accessibility::XAccessibleText,
css::accessibility::XAccessibleTextAttributes > AccessibleStaticTextBase_BASE;
/** Helper class for objects containing EditEngine/Outliner text
This class implements the XAccessibleText interface for static
text, somewhat similar to the children of the
AccessibleTextHelper class. Currently, there are no children,
i.e. the whole text is presented in one big chunk. This might
change in the future, if a need for image bullets should
arise. These, by convention, would be represented as children
of the text.
You have to implement the SvxEditSource, SvxTextForwarder,
SvxViewForwarder and SvxEditViewForwarder interfaces in order
to enable your object to cooperate with this
class. SvxTextForwarder encapsulates the fact that text
objects do not necessarily have an EditEngine at their
disposal, SvxViewForwarder and SvxEditViewForwarder do the
same for the document and the edit view. The three mentioned
forwarder objects are not stored by the AccessibleTextHelper,
but fetched every time from the SvxEditSource. So you are best
off making your SvxEditSource::Get*Forwarder methods cache the
current forwarder.
As this class is intended for static (i.e. non-changing) text
only, no event broadcasting is necessary. You must handle
visibility by yourself, the bounding boxes returned by
getCharacterBounds() are relative to your accessibility
object.
@attention All public non-UNO methods (those are the uppercase
ones) must not be called with any mutex hold, except when
calling from the main thread (with holds the solar mutex),
unless stated otherwise. This is because they themselves might
need the solar mutex in addition to the object mutex, and the
ordering of the locking must be: first solar mutex, then
object mutex. Furthermore, state change events might be fired
internally.
@derive Use this class as a base for objects containing static
edit engine text. To avoid overwriting every interface method
to intercept derived object defunc state, just set NULL as the
edit source. Every interface method will then properly throw
an exception.
*/
class EDITENG_DLLPUBLIC AccessibleStaticTextBase : public AccessibleStaticTextBase_BASE
{
public:
/** Create accessible text object for given edit source
@param pEditSource
The edit source to use. Object ownership is transferred
from the caller to the callee. The object listens on the
SvxEditSource for object disposal, so no provisions have
to be taken if the caller destroys the data (e.g. the
model) contained in the given SvxEditSource.
*/
explicit AccessibleStaticTextBase( ::std::unique_ptr< SvxEditSource > && pEditSource );
virtual ~AccessibleStaticTextBase();
private:
AccessibleStaticTextBase( const AccessibleStaticTextBase& ) = delete;
AccessibleStaticTextBase& operator= ( const AccessibleStaticTextBase& ) = delete;
public:
/** Set the current edit source
@attention You are required to have the solar mutex
locked, when calling this method. Thus, the method should
only be called from the main office thread.
The EditSource set here is required to broadcast out the
following hints: SfxHintId::EditSourceParasMoved,
SfxHintId::EditSourceSelectionChanged, SfxHintId::TextModified,
SfxHintId::TextParaInserted, SfxHintId::TextParaRemoved,
SfxHintId::TextHeightChanged,
SfxHintId::TextViewScrolled. Otherwise, not all state changes
will get noticed by the accessibility object. Further
more, when the corresponding core object or the model is
dying, either the edit source must be set to NULL or it
has to broadcast a SfxHintId::Dying hint.
This class does not have a dispose method, since it is not
a UNO component. Nevertheless, it holds C++ references to
several core objects, so you should issue a
SetEditSource(::std::unique_ptr<SvxEditSource>()) in
your dispose() method.
@param pEditSource
The new edit source to set. Object ownership is transferred
from the caller to the callee.
*/
void SetEditSource( ::std::unique_ptr< SvxEditSource > && pEditSource );
/** Set offset of EditEngine from parent
@attention You are required to have the solar mutex
locked, when calling this method. Thus, the method should
only be called from the main office thread.
If the origin of the underlying EditEngine does
not correspond to the upper left corner of the object
using this class, you have to specify the offset.
@param rPoint
The offset in screen coordinates (i.e. pixel)
*/
void SetOffset( const Point& rPoint );
/** Drop all references and enter disposed state
This method drops all references to external objects (also
the event source reference set via SetEventSource()) and
sets the object into the disposed state (i.e. the methods
return default values or throw a uno::DisposedException
exception).
*/
void Dispose();
// XAccessibleText interface implementation
virtual sal_Int32 SAL_CALL getCaretPosition() override final;
virtual sal_Bool SAL_CALL setCaretPosition( sal_Int32 nIndex ) override final;
virtual sal_Unicode SAL_CALL getCharacter( sal_Int32 nIndex ) override final;
virtual css::uno::Sequence< css::beans::PropertyValue > SAL_CALL getCharacterAttributes( sal_Int32 nIndex, const css::uno::Sequence< OUString >& aRequestedAttributes ) override;
virtual css::awt::Rectangle SAL_CALL getCharacterBounds( sal_Int32 nIndex ) override final;
virtual sal_Int32 SAL_CALL getCharacterCount() override final;
virtual sal_Int32 SAL_CALL getIndexAtPoint( const css::awt::Point& aPoint ) override final;
virtual OUString SAL_CALL getSelectedText() override final;
virtual sal_Int32 SAL_CALL getSelectionStart() override final;
virtual sal_Int32 SAL_CALL getSelectionEnd() override final;
/// This will only work with a functional SvxEditViewForwarder, i.e. an EditEngine/Outliner in edit mode
virtual sal_Bool SAL_CALL setSelection( sal_Int32 nStartIndex, sal_Int32 nEndIndex ) override final;
virtual OUString SAL_CALL getText() override final;
virtual OUString SAL_CALL getTextRange( sal_Int32 nStartIndex, sal_Int32 nEndIndex ) override final;
/// Does not support AccessibleTextType::SENTENCE (missing feature in EditEngine)
virtual css::accessibility::TextSegment SAL_CALL getTextAtIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override final;
/// Does not support AccessibleTextType::SENTENCE (missing feature in EditEngine)
virtual css::accessibility::TextSegment SAL_CALL getTextBeforeIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override final;
/// Does not support AccessibleTextType::SENTENCE (missing feature in EditEngine)
virtual css::accessibility::TextSegment SAL_CALL getTextBehindIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override final;
/// This will only work with a functional SvxEditViewForwarder, i.e. an EditEngine/Outliner in edit mode
virtual sal_Bool SAL_CALL copyText( sal_Int32 nStartIndex, sal_Int32 nEndIndex ) override final;
virtual sal_Bool SAL_CALL scrollSubstringTo( sal_Int32 nStartIndex, sal_Int32 nEndIndex, css::accessibility::AccessibleScrollType aScrollType) override final;
// XAccessibleTextAttributes
virtual css::uno::Sequence< css::beans::PropertyValue > SAL_CALL getDefaultAttributes( const css::uno::Sequence< OUString >& RequestedAttributes ) override final;
virtual css::uno::Sequence< css::beans::PropertyValue > SAL_CALL getRunAttributes( sal_Int32 Index, const css::uno::Sequence< OUString >& RequestedAttributes ) override final;
// child-related methods from XAccessibleContext
/// @throws css::uno::RuntimeException
virtual sal_Int64 SAL_CALL getAccessibleChildCount();
/// @throws css::lang::IndexOutOfBoundsException
/// @throws css::uno::RuntimeException
virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL getAccessibleChild( sal_Int64 i );
// child-related methods from XAccessibleComponent
/// @throws css::uno::RuntimeException
virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL getAccessibleAtPoint( const css::awt::Point& aPoint );
protected:
tools::Rectangle GetParagraphBoundingBox() const;
private:
EPaM ImpCalcInternal(sal_Int32 nFlatIndex, bool bExclusive) const;
EPaM Index2Internal(sal_Int32 nFlatIndex) const
{
return ImpCalcInternal(nFlatIndex, false);
}
EPaM Range2Internal(sal_Int32 nFlatIndex) const
{
return ImpCalcInternal(nFlatIndex, true);
}
AccessibleEditableTextPara& GetParagraph(sal_Int32 nPara) const;
sal_Int32 GetParagraphCount() const;
sal_Int32 Internal2Index(EPaM nEEIndex) const;
void CorrectTextSegment(css::accessibility::TextSegment& aTextSegment, int nPara) const;
bool SetSelection(sal_Int32 nStartPara, sal_Int32 nStartIndex,
sal_Int32 nEndPara, sal_Int32 nEndIndex);
bool CopyText(sal_Int32 nStartPara, sal_Int32 nStartIndex,
sal_Int32 nEndPara, sal_Int32 nEndIndex);
bool RemoveLineBreakCount(sal_Int32& rIndex);
// implements our functionality, we're just an adapter (guarded by solar mutex)
mutable rtl::Reference<AccessibleEditableTextPara> mxTextParagraph;
// a wrapper for the text forwarders (guarded by solar mutex)
mutable SvxEditSourceAdapter maEditSource;
};
} // end of namespace accessibility
#endif // INCLUDED_EDITENG_ACCESSIBLESTATICTEXTBASE_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
