WebCore/RenderBR.h

   1 /*
   2  * This file is part of the DOM implementation for KDE.
   3  *
   4  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public License
  17  * along with this library; see the file COPYING.LIB.  If not, write to
  18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA 02110-1301, USA.
  20  *
  21  */
  22
  23 #ifndef RenderBR_h
  24 #define RenderBR_h
  25
  26 #include "RenderText.h"
  27
  28 /*
  29  * The whole class here is a hack to get <br> working, as long as we don't have support for
  30  * CSS2 :before and :after pseudo elements
  31  */
  32 namespace WebCore {
  33
  34 class Position;
  35
  36 class RenderBR : public RenderText {
  37 public:
  38     RenderBR(Node*);
  39     virtual ~RenderBR();
  40
  41     virtual const char* renderName() const { return "RenderBR"; }
  42
  43     virtual IntRect selectionRectForRepaint(RenderBox* /*repaintContainer*/, bool /*clipToVisibleContent*/) { return IntRect(); }
  44
  45     virtual unsigned width(unsigned /*from*/, unsigned /*len*/, const Font&, int /*xpos*/) const { return 0; }
  46     virtual unsigned width(unsigned /*from*/, unsigned /*len*/, int /*xpos*/, bool /*firstLine = false*/) const { return 0; }
  47
  48     virtual int lineHeight(bool firstLine, bool isRootLineBox = false) const;
  49     virtual int baselinePosition(bool firstLine, bool isRootLineBox = false) const;
  50
  51     // overrides
  52     virtual InlineBox* createInlineBox(bool, bool, bool isOnlyRun = false);
  53
  54     virtual bool isBR() const { return true; }
  55
  56     virtual int caretMinOffset() const;
  57     virtual int caretMaxOffset() const;
  58     virtual unsigned caretMaxRenderedOffset() const;
  59
  60     virtual VisiblePosition positionForCoordinates(int x, int y);
  61
  62 protected:
  63     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
  64
  65 private:
  66     mutable int m_lineHeight;
  67 };
  68
  69 } // namespace WebCore
  70
  71 #endif // RenderBR_h