1 /* 2 * Copyright (C) 2000 Lars Knoll (knoll (at) 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 39 virtual const char* renderName() const { return "RenderBR"; } 40 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 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 65 inline RenderBR* toRenderBR(RenderObject* object) 66 { 67 ASSERT(!object || object->isBR()); 68 return static_cast<RenderBR*>(object); 69 } 70 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
