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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_VCL_INC_GRAPHITE_LAYOUT_HXX
21 : #define INCLUDED_VCL_INC_GRAPHITE_LAYOUT_HXX
22 : // Description: An implementation of the SalLayout interface that uses the
23 : // Graphite engine.
24 :
25 : // We need this to enable namespace support in libgrengine headers.
26 : #define GR_NAMESPACE
27 :
28 : // Standard Library
29 : #include <memory>
30 : #include <vector>
31 : #include <map>
32 : #include <utility>
33 : // Libraries
34 : #include <graphite_static.hxx>
35 : #include <graphite2/Font.h>
36 : #include <graphite2/Segment.h>
37 : // Platform
38 : #include <vcl/dllapi.h>
39 :
40 : #include "sallayout.hxx"
41 :
42 : // Module
43 :
44 : // Module type definitions and forward declarations.
45 : // SAL/VCL types
46 : class ServerFont;
47 : class PhysicalFontFace;
48 :
49 : // Graphite types
50 : namespace grutils { class GrFeatureParser; }
51 :
52 : class GraphiteFaceWrapper
53 : {
54 : public:
55 : typedef std::map<int, gr_font*> GrFontMap;
56 0 : GraphiteFaceWrapper(gr_face * pFace) : m_pFace(pFace) {}
57 0 : ~GraphiteFaceWrapper()
58 0 : {
59 0 : GrFontMap::iterator i = m_fonts.begin();
60 0 : while (i != m_fonts.end())
61 0 : gr_font_destroy((*i++).second);
62 0 : m_fonts.clear();
63 0 : gr_face_destroy(m_pFace);
64 0 : }
65 0 : const gr_face * face() const { return m_pFace; }
66 0 : gr_font * font(int ppm) const
67 : {
68 0 : GrFontMap::const_iterator i = m_fonts.find(ppm);
69 0 : if (i != m_fonts.end())
70 0 : return i->second;
71 0 : return NULL;
72 : };
73 0 : void addFont(int ppm, gr_font * pFont)
74 : {
75 0 : if (m_fonts[ppm])
76 0 : gr_font_destroy(m_fonts[ppm]);
77 0 : m_fonts[ppm] = pFont;
78 0 : }
79 : private:
80 : gr_face * m_pFace;
81 : GrFontMap m_fonts;
82 : };
83 :
84 : // This class uses the SIL Graphite engine to provide complex text layout services to the VCL
85 : // @author tse
86 :
87 : class VCL_PLUGIN_PUBLIC GraphiteLayout : public SalLayout
88 : {
89 : public:
90 : typedef std::vector<GlyphItem> Glyphs;
91 :
92 : mutable Glyphs mvGlyphs;
93 : void clear();
94 :
95 : private:
96 : const gr_face * mpFace; // not owned by layout
97 : gr_font * mpFont; // not owned by layout
98 : int mnSegCharOffset; // relative to ImplLayoutArgs::mpStr
99 : long mnWidth;
100 : std::vector<int> mvChar2BaseGlyph;
101 : std::vector<int> mvGlyph2Char;
102 : std::vector<int> mvCharDxs;
103 : std::vector<int> mvCharBreaks;
104 : float mfScaling;
105 : const grutils::GrFeatureParser * mpFeatures;
106 :
107 : public:
108 : GraphiteLayout(const gr_face * pFace, gr_font * pFont = NULL,
109 : const grutils::GrFeatureParser * features = NULL) throw();
110 :
111 : // used by upper layers
112 : virtual bool LayoutText( ImplLayoutArgs& ) SAL_OVERRIDE; // first step of layout
113 : // split into two stages to allow dc to be restored on the segment
114 : gr_segment * CreateSegment(ImplLayoutArgs& rArgs);
115 : bool LayoutGlyphs(ImplLayoutArgs& rArgs, gr_segment * pSegment);
116 :
117 : virtual void AdjustLayout( ImplLayoutArgs& ) SAL_OVERRIDE; // adjusting positions
118 :
119 : // methods using string indexing
120 : virtual sal_Int32 GetTextBreak(DeviceCoordinate nMaxWidth, DeviceCoordinate nCharExtra=0, int nFactor=1) const SAL_OVERRIDE;
121 : virtual DeviceCoordinate FillDXArray( DeviceCoordinate* pDXArray ) const SAL_OVERRIDE;
122 : virtual void ApplyDXArray(ImplLayoutArgs &rArgs, std::vector<int> & rDeltaWidth);
123 :
124 : virtual void GetCaretPositions( int nArraySize, long* pCaretXArray ) const SAL_OVERRIDE;
125 :
126 : // methods using glyph indexing
127 : virtual int GetNextGlyphs(int nLen, sal_GlyphId* pGlyphIdxAry, ::Point & rPos, int&,
128 : long* pGlyphAdvAry = NULL, int* pCharPosAry = NULL,
129 : const PhysicalFontFace** pFallbackFonts = NULL ) const SAL_OVERRIDE;
130 :
131 : // used by glyph+font+script fallback
132 : virtual void MoveGlyph( int nStart, long nNewXPos ) SAL_OVERRIDE;
133 : virtual void DropGlyph( int nStart ) SAL_OVERRIDE;
134 : virtual void Simplify( bool bIsBase ) SAL_OVERRIDE;
135 :
136 : // Dummy implementation so layout can be shared between Linux/Windows
137 0 : virtual void DrawText(SalGraphics&) const SAL_OVERRIDE {};
138 :
139 : virtual ~GraphiteLayout() throw();
140 0 : void SetFont(gr_font * pFont) { mpFont = pFont; }
141 : gr_font * GetFont() { return mpFont; }
142 0 : void SetFeatures(grutils::GrFeatureParser * aFeature) { mpFeatures = aFeature; }
143 : void SetFontScale(float s) { mfScaling = s; };
144 : virtual sal_GlyphId getKashidaGlyph(int & width) = 0;
145 : void kashidaJustify(std::vector<int> & rDeltaWidth, sal_GlyphId, int width);
146 :
147 : static const int EXTRA_CONTEXT_LENGTH;
148 : private:
149 : void expandOrCondense(ImplLayoutArgs &rArgs);
150 : void fillFrom(gr_segment * rSeg, ImplLayoutArgs & rArgs, float fScaling);
151 :
152 : float append(gr_segment * pSeg,
153 : ImplLayoutArgs & rArgs,
154 : const gr_slot * pSlot, float gOrigin,
155 : float nextGlyphOrigin, float fScaling,
156 : long & rDXOffset, bool bIsBase, int baseChar);
157 : };
158 :
159 : #endif // INCLUDED_VCL_INC_GRAPHITE_LAYOUT_HXX
160 :
161 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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