1/*
2 * Copyright (C) 2011 Apple Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 *
19 */
20
21#ifndef RenderCombineText_h
22#define RenderCombineText_h
23
24#include "RenderText.h"
25
26namespace WebCore {
27
28class RenderCombineText : public RenderText {
29public:
30    RenderCombineText(Node*, PassRefPtr<StringImpl>);
31
32    void combineText();
33    void adjustTextOrigin(FloatPoint& textOrigin, const FloatRect& boxRect) const;
34    void charactersToRender(int start, const UChar*& characters, int& length) const;
35    bool isCombined() const { return m_isCombined; }
36    float combinedTextWidth(const Font& font) const { return font.size(); }
37    const Font& originalFont() const { return parent()->style()->font(); }
38
39private:
40    virtual bool isCombineText() const { return true; }
41    virtual float width(unsigned from, unsigned length, const Font&, float xPosition, HashSet<const SimpleFontData*>* fallbackFonts = 0, GlyphOverflow* = 0) const;
42    virtual const char* renderName() const { return "RenderCombineText"; }
43    virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
44    virtual void setTextInternal(PassRefPtr<StringImpl>);
45
46    float m_combinedTextWidth;
47    bool m_isCombined : 1;
48    bool m_needsFontUpdate : 1;
49};
50
51inline RenderCombineText* toRenderCombineText(RenderObject* object)
52{
53    ASSERT(!object || object->isCombineText());
54    return static_cast<RenderCombineText*>(object);
55}
56
57inline const RenderCombineText* toRenderCombineText(const RenderObject* object)
58{
59    ASSERT(!object || object->isCombineText());
60    return static_cast<const RenderCombineText*>(object);
61}
62
63// This will catch anyone doing an unnecessary cast.
64void toRenderCombineText(const RenderCombineText*);
65
66} // namespace WebCore
67
68#endif // RenderCombineText_h
69