1/*
2 * Copyright (C) 2007 Rob Buis <buis@kde.org>
3 *           (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB.  If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 *
20 */
21
22#ifndef SVGInlineTextBox_h
23#define SVGInlineTextBox_h
24
25#if ENABLE(SVG)
26#include "InlineTextBox.h"
27
28namespace WebCore {
29
30    class SVGRootInlineBox;
31
32    struct SVGChar;
33    struct SVGTextDecorationInfo;
34
35    enum SVGTextPaintSubphase {
36        SVGTextPaintSubphaseBackground,
37        SVGTextPaintSubphaseGlyphFill,
38        SVGTextPaintSubphaseGlyphFillSelection,
39        SVGTextPaintSubphaseGlyphStroke,
40        SVGTextPaintSubphaseGlyphStrokeSelection,
41        SVGTextPaintSubphaseForeground
42    };
43
44    struct SVGTextPaintInfo {
45        SVGTextPaintInfo() : activePaintServer(0), subphase(SVGTextPaintSubphaseBackground) {}
46
47        SVGPaintServer* activePaintServer;
48        SVGTextPaintSubphase subphase;
49    };
50
51    class SVGInlineTextBox : public InlineTextBox {
52    public:
53        SVGInlineTextBox(RenderObject* obj);
54
55        virtual int virtualHeight() const { return m_height; }
56        void setHeight(int h) { m_height = h; }
57
58        virtual int selectionTop();
59        virtual int selectionHeight();
60
61        virtual int offsetForPosition(int x, bool includePartialGlyphs = true) const;
62        virtual int positionForOffset(int offset) const;
63
64        virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty);
65        virtual IntRect selectionRect(int absx, int absy, int startPos, int endPos);
66
67        // SVGs custom paint text method
68        void paintCharacters(RenderObject::PaintInfo&, int tx, int ty, const SVGChar&, const UChar* chars, int length, SVGTextPaintInfo&);
69
70        // SVGs custom paint selection method
71        void paintSelection(int boxStartOffset, const SVGChar&, const UChar*, int length, GraphicsContext*, RenderStyle*, const Font&);
72
73        // SVGs custom paint decoration method
74        void paintDecoration(ETextDecoration, GraphicsContext*, int tx, int ty, int width, const SVGChar&, const SVGTextDecorationInfo&);
75
76        SVGRootInlineBox* svgRootInlineBox() const;
77
78        // Helper functions shared with SVGRootInlineBox
79        float calculateGlyphWidth(RenderStyle* style, int offset, int extraCharsAvailable, int& charsConsumed, String& glyphName) const;
80        float calculateGlyphHeight(RenderStyle*, int offset, int extraCharsAvailable) const;
81
82        FloatRect calculateGlyphBoundaries(RenderStyle*, int offset, const SVGChar&) const;
83        SVGChar* closestCharacterToPosition(int x, int y, int& offset) const;
84
85    private:
86        friend class RenderSVGInlineText;
87        bool svgCharacterHitsPosition(int x, int y, int& offset) const;
88        bool chunkSelectionStartEnd(const UChar* chunk, int chunkLength, int& selectionStart, int& selectionEnd);
89
90        int m_height;
91    };
92
93} // namespace WebCore
94
95#endif
96#endif // SVGInlineTextBox_h
97