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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #ifndef INCLUDED_SDEXT_SOURCE_PRESENTER_PRESENTERTEXTVIEW_HXX
21 : #define INCLUDED_SDEXT_SOURCE_PRESENTER_PRESENTERTEXTVIEW_HXX
22 :
23 : #include "PresenterTheme.hxx"
24 : #include <com/sun/star/accessibility/XAccessibleText.hpp>
25 : #include <com/sun/star/awt/Size.hpp>
26 : #include <com/sun/star/geometry/RealPoint2D.hpp>
27 : #include <com/sun/star/geometry/RealSize2D.hpp>
28 : #include <com/sun/star/i18n/XBreakIterator.hpp>
29 : #include <com/sun/star/i18n/XScriptTypeDetector.hpp>
30 : #include <com/sun/star/rendering/XCanvas.hpp>
31 : #include <com/sun/star/style/ParagraphAdjust.hpp>
32 : #include <com/sun/star/text/XText.hpp>
33 : #include <com/sun/star/uno/XComponentContext.hpp>
34 : #include <cppuhelper/compbase1.hxx>
35 : #include <cppuhelper/basemutex.hxx>
36 :
37 : namespace cssu = ::com::sun::star::uno;
38 : namespace cssa = ::com::sun::star::accessibility;
39 :
40 : namespace sdext { namespace presenter {
41 :
42 : class PresenterTextCaret
43 : {
44 : public:
45 : PresenterTextCaret (
46 : const ::boost::function<css::awt::Rectangle(const sal_Int32,const sal_Int32)>&
47 : rCharacterBoundsAccess,
48 : const ::boost::function<void(const css::awt::Rectangle&)>&
49 : rInvalidator);
50 : ~PresenterTextCaret (void);
51 :
52 : void ShowCaret (void);
53 : void HideCaret (void);
54 :
55 : sal_Int32 GetParagraphIndex (void) const;
56 : sal_Int32 GetCharacterIndex (void) const;
57 : void SetPosition (
58 : const sal_Int32 nParagraphIndex,
59 : const sal_Int32 nCharacterIndex);
60 :
61 : bool IsVisible (void) const;
62 :
63 : /** Set a (possibly empty) functor that broadcasts changes of the caret
64 : position. This is used when a PresenterTextView object is set at
65 : the accessibility object so that accessibility events can be sent
66 : when the caret changes position.
67 : */
68 : void SetCaretMotionBroadcaster (
69 : const ::boost::function<void(sal_Int32,sal_Int32,sal_Int32,sal_Int32)>& rBroadcaster);
70 :
71 : css::awt::Rectangle GetBounds (void) const;
72 :
73 : private:
74 : sal_Int32 mnParagraphIndex;
75 : sal_Int32 mnCharacterIndex;
76 : sal_Int32 mnCaretBlinkTaskId;
77 : bool mbIsCaretVisible;
78 : const ::boost::function<css::awt::Rectangle(const sal_Int32,const sal_Int32)> maCharacterBoundsAccess;
79 : const ::boost::function<void(const css::awt::Rectangle&)> maInvalidator;
80 : ::boost::function<void(sal_Int32,sal_Int32,sal_Int32,sal_Int32)> maBroadcaster;
81 : css::awt::Rectangle maCaretBounds;
82 :
83 : void InvertCaret (void);
84 : };
85 : typedef ::boost::shared_ptr<PresenterTextCaret> SharedPresenterTextCaret;
86 :
87 : //===== PresenterTextParagraph ================================================
88 :
89 0 : class PresenterTextParagraph
90 : {
91 : public:
92 : PresenterTextParagraph (
93 : const sal_Int32 nParagraphIndex,
94 : const cssu::Reference<css::i18n::XBreakIterator>& rxBreakIterator,
95 : const cssu::Reference<css::i18n::XScriptTypeDetector>& rxScriptTypeDetector,
96 : const cssu::Reference<css::text::XTextRange>& rxTextRange,
97 : const SharedPresenterTextCaret& rpCaret);
98 :
99 : void Paint (
100 : const cssu::Reference<css::rendering::XCanvas>& rxCanvas,
101 : const css::geometry::RealSize2D& rSize,
102 : const PresenterTheme::SharedFontDescriptor& rpFont,
103 : const css::rendering::ViewState& rViewState,
104 : css::rendering::RenderState& rRenderState,
105 : const double nTopOffset,
106 : const double nClipTop,
107 : const double nClipBottom);
108 :
109 : double GetTotalTextHeight (void);
110 :
111 : void SetCharacterOffset (const sal_Int32 nCharacterOffset);
112 : sal_Int32 GetCharacterCount (void) const;
113 : sal_Unicode GetCharacter (const sal_Int32 nGlobalCharacterIndex) const;
114 : OUString GetText (void) const;
115 : cssa::TextSegment GetTextSegment (
116 : const sal_Int32 nOffset,
117 : const sal_Int32 nGlobalCharacterIndex,
118 : const sal_Int16 nTextType) const;
119 : cssa::TextSegment GetWordTextSegment (
120 : const sal_Int32 nOffset,
121 : const sal_Int32 nIndex) const;
122 : cssa::TextSegment CreateTextSegment (
123 : sal_Int32 nStartIndex,
124 : sal_Int32 nEndIndex) const;
125 : css::awt::Rectangle GetCharacterBounds (
126 : sal_Int32 nGlobalCharacterIndex,
127 : const bool bCaretBox);
128 : sal_Int32 GetIndexAtPoint (const css::awt::Point& rPoint) const;
129 : void SetupCellArray (
130 : const PresenterTheme::SharedFontDescriptor& rpFont);
131 : void Format (
132 : const double nY,
133 : const double nWidth,
134 : const PresenterTheme::SharedFontDescriptor& rpFont);
135 : sal_Int32 GetWordBoundary(
136 : const sal_Int32 nLocalCharacterIndex,
137 : const sal_Int32 nDistance);
138 : sal_Int32 GetCaretPosition (void) const;
139 : void SetCaretPosition (const sal_Int32 nPosition) const;
140 : void SetOrigin (const double nXOrigin, const double nYOrigin);
141 : css::awt::Point GetRelativeLocation (void) const;
142 : css::awt::Size GetSize (void);
143 :
144 : private:
145 : OUString msParagraphText;
146 : const sal_Int32 mnParagraphIndex;
147 : SharedPresenterTextCaret mpCaret;
148 :
149 : /** A portion of a string that encodes one unicode cell. It describes
150 : number of characters in the unicode string that make up the cell and its
151 : width in pixel (with respect to some configuration that is stored
152 : externally or implicitly).
153 : */
154 : class Cell
155 : {
156 : public:
157 : Cell (const sal_Int32 nCharacterIndex, const sal_Int32 nCharacterCount, const double nCellWidth);
158 : sal_Int32 mnCharacterIndex;
159 : sal_Int32 mnCharacterCount;
160 : double mnCellWidth;
161 : };
162 :
163 0 : class Line
164 : {
165 : public:
166 : Line (const sal_Int32 nLineStartCharacterIndex, const sal_Int32 nLineEndCharacterIndex);
167 : sal_Int32 mnLineStartCharacterIndex;
168 : sal_Int32 mnLineEndCharacterIndex;
169 : sal_Int32 mnLineStartCellIndex;
170 : sal_Int32 mnLineEndCellIndex;
171 : cssu::Reference<css::rendering::XTextLayout> mxLayoutedLine;
172 : double mnBaseLine;
173 : double mnWidth;
174 : cssu::Sequence<css::geometry::RealRectangle2D> maCellBoxes;
175 :
176 : void ProvideLayoutedLine (
177 : const OUString& rsParagraphText,
178 : const PresenterTheme::SharedFontDescriptor& rpFont,
179 : const sal_Int8 nTextDirection);
180 : void ProvideCellBoxes (void);
181 : bool IsEmpty (void) const;
182 : };
183 :
184 : cssu::Reference<css::i18n::XBreakIterator> mxBreakIterator;
185 : cssu::Reference<css::i18n::XScriptTypeDetector> mxScriptTypeDetector;
186 : ::std::vector<Line> maLines;
187 : ::std::vector<sal_Int32> maWordBoundaries;
188 : // Offset of the top of the paragraph with respect to the origin of the
189 : // whole text (specified by mnXOrigin and mnYOrigin).
190 : double mnVerticalOffset;
191 : double mnXOrigin;
192 : double mnYOrigin;
193 : double mnWidth;
194 : double mnAscent;
195 : double mnDescent;
196 : double mnLineHeight;
197 : css::style::ParagraphAdjust meAdjust;
198 : sal_Int8 mnWritingMode;
199 : /// The index of the first character in this paragraph with respect to
200 : /// the whole text.
201 : sal_Int32 mnCharacterOffset;
202 : ::std::vector<Cell> maCells;
203 :
204 : void AddWord (
205 : const double nWidth,
206 : css::i18n::Boundary& rCurrentLine,
207 : const sal_Int32 nWordBoundary,
208 : const PresenterTheme::SharedFontDescriptor& rpFont);
209 : void AddLine (
210 : css::i18n::Boundary& rCurrentLine);
211 : sal_Int8 GetTextDirection (void) const;
212 : bool IsTextReferencePointLeft (void) const;
213 : };
214 : typedef ::boost::shared_ptr<PresenterTextParagraph> SharedPresenterTextParagraph;
215 :
216 : /** A simple text view that paints text onto a given canvas.
217 : */
218 0 : class PresenterTextView
219 : {
220 : public:
221 :
222 : PresenterTextView (
223 : const css::uno::Reference<css::uno::XComponentContext>& rxContext,
224 : const css::uno::Reference<css::rendering::XCanvas>& rxCanvas,
225 : const ::boost::function<void(const css::awt::Rectangle&)>& rInvalidator);
226 : void SetText (const css::uno::Reference<css::text::XText>& rxText);
227 : void SetTextChangeBroadcaster (const ::boost::function<void(void)>& rBroadcaster);
228 :
229 : void SetLocation (const css::geometry::RealPoint2D& rLocation);
230 : void SetSize (const css::geometry::RealSize2D& rSize);
231 : double GetTotalTextHeight (void);
232 :
233 : void SetFont (const PresenterTheme::SharedFontDescriptor& rpFont);
234 :
235 : void SetOffset (
236 : const double nLeft,
237 : const double nTop);
238 :
239 : /** Move the caret forward or backward by character or by word.
240 : @param nDistance
241 : Should be either -1 or +1 to move caret backwards or forwards,
242 : respectively.
243 : @param nTextType
244 : Valid values are the
245 : com::sun::star::accessibility::AccessibleTextType constants.
246 : */
247 : void MoveCaret (
248 : const sal_Int32 nDistance,
249 : const sal_Int16 nTextType);
250 :
251 : void Paint (const css::awt::Rectangle& rUpdateBox);
252 :
253 : SharedPresenterTextCaret GetCaret (void) const;
254 :
255 : sal_Int32 GetParagraphCount (void) const;
256 : SharedPresenterTextParagraph GetParagraph (const sal_Int32 nParagraphIndex) const;
257 :
258 : private:
259 : css::uno::Reference<css::rendering::XCanvas> mxCanvas;
260 : bool mbDoOuput;
261 : css::uno::Reference<css::i18n::XBreakIterator> mxBreakIterator;
262 : css::uno::Reference<css::i18n::XScriptTypeDetector> mxScriptTypeDetector;
263 : css::geometry::RealPoint2D maLocation;
264 : css::geometry::RealSize2D maSize;
265 : PresenterTheme::SharedFontDescriptor mpFont;
266 : ::std::vector<SharedPresenterTextParagraph> maParagraphs;
267 : SharedPresenterTextCaret mpCaret;
268 : double mnLeftOffset;
269 : double mnTopOffset;
270 : const ::boost::function<void(const css::awt::Rectangle&)> maInvalidator;
271 : bool mbIsFormatPending;
272 : sal_Int32 mnCharacterCount;
273 : ::boost::function<void(void)> maTextChangeBroadcaster;
274 :
275 : void RequestFormat (void);
276 : void Format (void);
277 : SharedPresenterTextParagraph GetParagraphForCharacterIndex (const sal_Int32 nCharacterIndex) const;
278 : css::awt::Rectangle GetCaretBounds (
279 : const sal_Int32 nParagraphIndex,
280 : const sal_Int32 nCharacterIndex) const;
281 : };
282 :
283 : } } // end of namespace ::sdext::presenter
284 :
285 : #endif
286 :
287 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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