1 /*
2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
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 RenderBR_h
22 #define RenderBR_h
23
24 #include "RenderText.h"
25
26 /*
27 * The whole class here is a hack to get <br> working, as long as we don't have support for
28 * CSS2 :before and :after pseudo elements
29 */
30 namespace WebCore {
31
32 class Position;
33
34 class RenderBR : public RenderText {
35 public:
36 RenderBR(Node*);
37 virtual ~RenderBR();
38
renderName()39 virtual const char* renderName() const { return "RenderBR"; }
40
selectionRectForRepaint(RenderBoxModelObject *,bool)41 virtual IntRect selectionRectForRepaint(RenderBoxModelObject* /*repaintContainer*/, bool /*clipToVisibleContent*/) { return IntRect(); }
42
43 virtual float width(unsigned /*from*/, unsigned /*len*/, const Font&, float /*xPos*/, HashSet<const SimpleFontData*>* = 0 /*fallbackFonts*/ , GlyphOverflow* = 0) const { return 0; }
44 virtual float width(unsigned /*from*/, unsigned /*len*/, float /*xpos*/, bool = false /*firstLine*/, HashSet<const SimpleFontData*>* = 0 /*fallbackFonts*/, GlyphOverflow* = 0) const { return 0; }
45
46 int lineHeight(bool firstLine) const;
47
48 // overrides
isBR()49 virtual bool isBR() const { return true; }
50
51 virtual int caretMinOffset() const;
52 virtual int caretMaxOffset() const;
53 virtual unsigned caretMaxRenderedOffset() const;
54
55 virtual VisiblePosition positionForPoint(const IntPoint&);
56
57 protected:
58 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
59
60 private:
61 mutable int m_lineHeight;
62 };
63
64
toRenderBR(RenderObject * object)65 inline RenderBR* toRenderBR(RenderObject* object)
66 {
67 ASSERT(!object || object->isBR());
68 return static_cast<RenderBR*>(object);
69 }
70
toRenderBR(const RenderObject * object)71 inline const RenderBR* toRenderBR(const RenderObject* object)
72 {
73 ASSERT(!object || object->isBR());
74 return static_cast<const RenderBR*>(object);
75 }
76
77 // This will catch anyone doing an unnecessary cast.
78 void toRenderBR(const RenderBR*);
79
80 } // namespace WebCore
81
82 #endif // RenderBR_h
83