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
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef _SV_GRAPHITELAYOUT_HXX
#define _SV_GRAPHITELAYOUT_HXX
// Description: An implementation of the SalLayout interface that uses the
// Graphite engine.
// We need this to enable namespace support in libgrengine headers.
#define GR_NAMESPACE
// Standard Library
#include <memory>
#include <vector>
#include <map>
#include <utility>
// Libraries
#include <graphite2/Font.h>
#include <graphite2/Segment.h>
// Platform
#include <sallayout.hxx>
#include <vcl/dllapi.h>
// Module
// Module type definitions and forward declarations.
// SAL/VCL types
class ServerFont;
// Graphite types
namespace grutils { class GrFeatureParser; }
class GraphiteFaceWrapper
{
public:
typedef std::map<int, gr_font*> GrFontMap;
GraphiteFaceWrapper(gr_face * pFace) : m_pFace(pFace) {}
~GraphiteFaceWrapper()
{
GrFontMap::iterator i = m_fonts.begin();
while (i != m_fonts.end())
gr_font_destroy((*i++).second);
m_fonts.clear();
gr_face_destroy(m_pFace);
}
const gr_face * face() const { return m_pFace; }
gr_font * font(int ppm) const
{
GrFontMap::const_iterator i = m_fonts.find(ppm);
if (i != m_fonts.end())
return i->second;
return NULL;
};
void addFont(int ppm, gr_font * pFont)
{
if (m_fonts[ppm])
gr_font_destroy(m_fonts[ppm]);
m_fonts[ppm] = pFont;
}
private:
gr_face * m_pFace;
GrFontMap m_fonts;
};
// This class uses the SIL Graphite engine to provide complex text layout services to the VCL
// @author tse
//
class VCL_PLUGIN_PUBLIC GraphiteLayout : public SalLayout
{
public:
class Glyphs : public std::vector<GlyphItem>
{
public:
typedef std::pair<Glyphs::const_iterator, Glyphs::const_iterator> iterator_pair_t;
};
mutable Glyphs mvGlyphs;
void clear();
private:
const gr_face * mpFace; // not owned by layout
gr_font * mpFont; // not owned by layout
int mnSegCharOffset; // relative to ImplLayoutArgs::mpStr
long mnWidth;
std::vector<int> mvChar2BaseGlyph;
std::vector<int> mvGlyph2Char;
std::vector<int> mvCharDxs;
std::vector<int> mvCharBreaks;
float mfScaling;
const grutils::GrFeatureParser * mpFeatures;
public:
GraphiteLayout(const gr_face * pFace, gr_font * pFont = NULL,
const grutils::GrFeatureParser * features = NULL) throw();
// used by upper layers
virtual bool LayoutText( ImplLayoutArgs& ); // first step of layout
// split into two stages to allow dc to be restored on the segment
gr_segment * CreateSegment(ImplLayoutArgs& rArgs);
bool LayoutGlyphs(ImplLayoutArgs& rArgs, gr_segment * pSegment);
virtual void AdjustLayout( ImplLayoutArgs& ); // adjusting positions
// methods using string indexing
virtual int GetTextBreak( long nMaxWidth, long nCharExtra=0, int nFactor=1 ) const;
virtual long FillDXArray( sal_Int32* pDXArray ) const;
virtual void ApplyDXArray(ImplLayoutArgs &rArgs, std::vector<int> & rDeltaWidth);
virtual void GetCaretPositions( int nArraySize, sal_Int32* pCaretXArray ) const;
// methods using glyph indexing
virtual int GetNextGlyphs(int nLen, sal_GlyphId* pGlyphIdxAry, ::Point & rPos, int&,
sal_Int32* pGlyphAdvAry = 0, int* pCharPosAry = 0 ) const;
// used by glyph+font+script fallback
virtual void MoveGlyph( int nStart, long nNewXPos );
virtual void DropGlyph( int nStart );
virtual void Simplify( bool bIsBase );
// Dummy implementation so layout can be shared between Linux/Windows
virtual void DrawText(SalGraphics&) const {};
virtual ~GraphiteLayout() throw();
void SetFont(gr_font * pFont) { mpFont = pFont; }
gr_font * GetFont() { return mpFont; }
void SetFeatures(grutils::GrFeatureParser * aFeature) { mpFeatures = aFeature; }
void SetFontScale(float s) { mfScaling = s; };
virtual sal_GlyphId getKashidaGlyph(int & width) = 0;
void kashidaJustify(std::vector<int> & rDeltaWidth, sal_GlyphId, int width);
static const int EXTRA_CONTEXT_LENGTH;
private:
void expandOrCondense(ImplLayoutArgs &rArgs);
void fillFrom(gr_segment * rSeg, ImplLayoutArgs & rArgs, float fScaling);
float append(gr_segment * pSeg,
ImplLayoutArgs & rArgs,
const gr_slot * pSlot, float gOrigin,
float nextGlyphOrigin, float fScaling,
long & rDXOffset, bool bIsBase, int baseChar);
};
#endif // _SV_GRAPHITELAYOUT_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
