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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 :
38 : namespace sdext { namespace presenter {
39 :
40 : class PresenterTextCaret
41 : {
42 : public:
43 : PresenterTextCaret (
44 : const ::boost::function<css::awt::Rectangle(const sal_Int32,const sal_Int32)>&
45 : rCharacterBoundsAccess,
46 : const ::boost::function<void(const css::awt::Rectangle&)>&
47 : rInvalidator);
48 : ~PresenterTextCaret (void);
49 :
50 : void ShowCaret (void);
51 : void HideCaret (void);
52 :
53 0 : sal_Int32 GetParagraphIndex (void) const { return mnParagraphIndex;}
54 0 : sal_Int32 GetCharacterIndex (void) const { return mnCharacterIndex;}
55 : void SetPosition (
56 : const sal_Int32 nParagraphIndex,
57 : const sal_Int32 nCharacterIndex);
58 :
59 0 : bool IsVisible (void) const { return mbIsCaretVisible;}
60 :
61 : /** Set a (possibly empty) functor that broadcasts changes of the caret
62 : position. This is used when a PresenterTextView object is set at
63 : the accessibility object so that accessibility events can be sent
64 : when the caret changes position.
65 : */
66 : void SetCaretMotionBroadcaster (
67 : const ::boost::function<void(sal_Int32,sal_Int32,sal_Int32,sal_Int32)>& rBroadcaster);
68 :
69 : css::awt::Rectangle GetBounds (void) const;
70 :
71 : private:
72 : sal_Int32 mnParagraphIndex;
73 : sal_Int32 mnCharacterIndex;
74 : sal_Int32 mnCaretBlinkTaskId;
75 : bool mbIsCaretVisible;
76 : const ::boost::function<css::awt::Rectangle(const sal_Int32,const sal_Int32)> maCharacterBoundsAccess;
77 : const ::boost::function<void(const css::awt::Rectangle&)> maInvalidator;
78 : ::boost::function<void(sal_Int32,sal_Int32,sal_Int32,sal_Int32)> maBroadcaster;
79 : css::awt::Rectangle maCaretBounds;
80 :
81 : void InvertCaret (void);
82 : };
83 : typedef ::boost::shared_ptr<PresenterTextCaret> SharedPresenterTextCaret;
84 :
85 : //===== PresenterTextParagraph ================================================
86 :
87 0 : class PresenterTextParagraph
88 : {
89 : public:
90 : PresenterTextParagraph (
91 : const sal_Int32 nParagraphIndex,
92 : const css::uno::Reference<css::i18n::XBreakIterator>& rxBreakIterator,
93 : const css::uno::Reference<css::i18n::XScriptTypeDetector>& rxScriptTypeDetector,
94 : const css::uno::Reference<css::text::XTextRange>& rxTextRange,
95 : const SharedPresenterTextCaret& rpCaret);
96 :
97 : void Paint (
98 : const css::uno::Reference<css::rendering::XCanvas>& rxCanvas,
99 : const css::geometry::RealSize2D& rSize,
100 : const PresenterTheme::SharedFontDescriptor& rpFont,
101 : const css::rendering::ViewState& rViewState,
102 : css::rendering::RenderState& rRenderState,
103 : const double nTopOffset,
104 : const double nClipTop,
105 : const double nClipBottom);
106 :
107 : double GetTotalTextHeight (void);
108 :
109 : void SetCharacterOffset (const sal_Int32 nCharacterOffset);
110 : sal_Int32 GetCharacterCount (void) const;
111 : sal_Unicode GetCharacter (const sal_Int32 nGlobalCharacterIndex) const;
112 : OUString GetText (void) const;
113 : css::accessibility::TextSegment GetTextSegment (
114 : const sal_Int32 nOffset,
115 : const sal_Int32 nGlobalCharacterIndex,
116 : const sal_Int16 nTextType) const;
117 : css::accessibility::TextSegment GetWordTextSegment (
118 : const sal_Int32 nOffset,
119 : const sal_Int32 nIndex) const;
120 : css::accessibility::TextSegment CreateTextSegment (
121 : sal_Int32 nStartIndex,
122 : sal_Int32 nEndIndex) const;
123 : css::awt::Rectangle GetCharacterBounds (
124 : sal_Int32 nGlobalCharacterIndex,
125 : const bool bCaretBox);
126 : sal_Int32 GetIndexAtPoint (const css::awt::Point& rPoint) const;
127 : void SetupCellArray (
128 : const PresenterTheme::SharedFontDescriptor& rpFont);
129 : void Format (
130 : const double nY,
131 : const double nWidth,
132 : const PresenterTheme::SharedFontDescriptor& rpFont);
133 : sal_Int32 GetWordBoundary(
134 : const sal_Int32 nLocalCharacterIndex,
135 : const sal_Int32 nDistance);
136 : sal_Int32 GetCaretPosition (void) const;
137 : void SetCaretPosition (const sal_Int32 nPosition) const;
138 : void SetOrigin (const double nXOrigin, const double nYOrigin);
139 : css::awt::Point GetRelativeLocation (void) const;
140 : css::awt::Size GetSize (void);
141 :
142 : private:
143 : OUString msParagraphText;
144 : const sal_Int32 mnParagraphIndex;
145 : SharedPresenterTextCaret mpCaret;
146 :
147 : /** A portion of a string that encodes one unicode cell. It describes
148 : number of characters in the unicode string that make up the cell and its
149 : width in pixel (with respect to some configuration that is stored
150 : externally or implicitly).
151 : */
152 : class Cell
153 : {
154 : public:
155 : Cell (const sal_Int32 nCharacterIndex, const sal_Int32 nCharacterCount, const double nCellWidth);
156 : sal_Int32 mnCharacterIndex;
157 : sal_Int32 mnCharacterCount;
158 : double mnCellWidth;
159 : };
160 :
161 0 : class Line
162 : {
163 : public:
164 : Line (const sal_Int32 nLineStartCharacterIndex, const sal_Int32 nLineEndCharacterIndex);
165 : sal_Int32 mnLineStartCharacterIndex;
166 : sal_Int32 mnLineEndCharacterIndex;
167 : sal_Int32 mnLineStartCellIndex;
168 : sal_Int32 mnLineEndCellIndex;
169 : css::uno::Reference<css::rendering::XTextLayout> mxLayoutedLine;
170 : double mnBaseLine;
171 : double mnWidth;
172 : css::uno::Sequence<css::geometry::RealRectangle2D> maCellBoxes;
173 :
174 : void ProvideLayoutedLine (
175 : const OUString& rsParagraphText,
176 : const PresenterTheme::SharedFontDescriptor& rpFont,
177 : const sal_Int8 nTextDirection);
178 : void ProvideCellBoxes (void);
179 : bool IsEmpty (void) const;
180 : };
181 :
182 : css::uno::Reference<css::i18n::XBreakIterator> mxBreakIterator;
183 : css::uno::Reference<css::i18n::XScriptTypeDetector> mxScriptTypeDetector;
184 : ::std::vector<Line> maLines;
185 : ::std::vector<sal_Int32> maWordBoundaries;
186 : // Offset of the top of the paragraph with respect to the origin of the
187 : // whole text (specified by mnXOrigin and mnYOrigin).
188 : double mnVerticalOffset;
189 : double mnXOrigin;
190 : double mnYOrigin;
191 : double mnWidth;
192 : double mnAscent;
193 : double mnDescent;
194 : double mnLineHeight;
195 : css::style::ParagraphAdjust meAdjust;
196 : sal_Int8 mnWritingMode;
197 : /// The index of the first character in this paragraph with respect to
198 : /// the whole text.
199 : sal_Int32 mnCharacterOffset;
200 : ::std::vector<Cell> maCells;
201 :
202 : void AddWord (
203 : const double nWidth,
204 : css::i18n::Boundary& rCurrentLine,
205 : const sal_Int32 nWordBoundary,
206 : const PresenterTheme::SharedFontDescriptor& rpFont);
207 : void AddLine (
208 : css::i18n::Boundary& rCurrentLine);
209 : sal_Int8 GetTextDirection (void) const;
210 : bool IsTextReferencePointLeft (void) const;
211 : };
212 : typedef ::boost::shared_ptr<PresenterTextParagraph> SharedPresenterTextParagraph;
213 :
214 : /** A simple text view that paints text onto a given canvas.
215 : */
216 0 : class PresenterTextView
217 : {
218 : public:
219 :
220 : PresenterTextView (
221 : const css::uno::Reference<css::uno::XComponentContext>& rxContext,
222 : const css::uno::Reference<css::rendering::XCanvas>& rxCanvas,
223 : const ::boost::function<void(const css::awt::Rectangle&)>& rInvalidator);
224 : void SetText (const css::uno::Reference<css::text::XText>& rxText);
225 : void SetTextChangeBroadcaster (const ::boost::function<void(void)>& rBroadcaster);
226 :
227 : void SetLocation (const css::geometry::RealPoint2D& rLocation);
228 : void SetSize (const css::geometry::RealSize2D& rSize);
229 : double GetTotalTextHeight (void);
230 :
231 : void SetFont (const PresenterTheme::SharedFontDescriptor& rpFont);
232 :
233 : void SetOffset (
234 : const double nLeft,
235 : const double nTop);
236 :
237 : /** Move the caret forward or backward by character or by word.
238 : @param nDistance
239 : Should be either -1 or +1 to move caret backwards or forwards,
240 : respectively.
241 : @param nTextType
242 : Valid values are the
243 : css::accessibility::AccessibleTextType constants.
244 : */
245 : void MoveCaret (
246 : const sal_Int32 nDistance,
247 : const sal_Int16 nTextType);
248 :
249 : void Paint (const css::awt::Rectangle& rUpdateBox);
250 :
251 : SharedPresenterTextCaret GetCaret (void) const;
252 :
253 : sal_Int32 GetParagraphCount (void) const;
254 : SharedPresenterTextParagraph GetParagraph (const sal_Int32 nParagraphIndex) const;
255 :
256 : private:
257 : css::uno::Reference<css::rendering::XCanvas> mxCanvas;
258 : bool mbDoOuput;
259 : css::uno::Reference<css::i18n::XBreakIterator> mxBreakIterator;
260 : css::uno::Reference<css::i18n::XScriptTypeDetector> mxScriptTypeDetector;
261 : css::geometry::RealPoint2D maLocation;
262 : css::geometry::RealSize2D maSize;
263 : PresenterTheme::SharedFontDescriptor mpFont;
264 : ::std::vector<SharedPresenterTextParagraph> maParagraphs;
265 : SharedPresenterTextCaret mpCaret;
266 : double mnLeftOffset;
267 : double mnTopOffset;
268 : const ::boost::function<void(const css::awt::Rectangle&)> maInvalidator;
269 : bool mbIsFormatPending;
270 : sal_Int32 mnCharacterCount;
271 : ::boost::function<void(void)> maTextChangeBroadcaster;
272 :
273 : void RequestFormat (void);
274 : void Format (void);
275 : SharedPresenterTextParagraph GetParagraphForCharacterIndex (const sal_Int32 nCharacterIndex) const;
276 : css::awt::Rectangle GetCaretBounds (
277 : const sal_Int32 nParagraphIndex,
278 : const sal_Int32 nCharacterIndex) const;
279 : };
280 :
281 : } } // end of namespace ::sdext::presenter
282 :
283 : #endif
284 :
285 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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