WebCore/RenderSelectionInfo.h

   1 /*
   2  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
   3  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
   4  *           (C) 2000 Dirk Mueller (mueller@kde.org)
   5  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
   6  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Library General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Library General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Library General Public License
  19  * along with this library; see the file COPYING.LIB.  If not, write to
  20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21  * Boston, MA 02110-1301, USA.
  22  *
  23  */
  24
  25 #ifndef SelectionInfo_h
  26 #define SelectionInfo_h
  27
  28 #include "IntRect.h"
  29 #include "RenderBox.h"
  30
  31 namespace WebCore {
  32
  33 class RenderSelectionInfoBase {
  34 public:
  35     RenderSelectionInfoBase()
  36         : m_object(0)
  37         , m_repaintContainer(0)
  38         , m_state(RenderObject::SelectionNone)
  39     {
  40     }
  41
  42     RenderSelectionInfoBase(RenderObject* o)
  43         : m_object(o)
  44         , m_repaintContainer(o->containerForRepaint())
  45         , m_state(o->selectionState())
  46     {
  47     }
  48
  49     RenderObject* object() const { return m_object; }
  50     RenderBox* repaintContainer() const { return m_repaintContainer; }
  51     RenderObject::SelectionState state() const { return m_state; }
  52
  53 protected:
  54     RenderObject* m_object;
  55     RenderBox* m_repaintContainer;
  56     RenderObject::SelectionState m_state;
  57 };
  58
  59 // This struct is used when the selection changes to cache the old and new state of the selection for each RenderObject.
  60 class RenderSelectionInfo : public RenderSelectionInfoBase {
  61 public:
  62     RenderSelectionInfo(RenderObject* o, bool clipToVisibleContent)
  63         : RenderSelectionInfoBase(o)
  64         , m_rect(o->needsLayout() ? IntRect() : o->selectionRectForRepaint(m_repaintContainer, clipToVisibleContent))
  65     {
  66     }
  67
  68     void repaint()
  69     {
  70         m_object->repaintUsingContainer(m_repaintContainer, m_rect);
  71     }
  72
  73     IntRect rect() const { return m_rect; }
  74
  75 private:
  76     IntRect m_rect; // relative to repaint container
  77 };
  78
  79
  80 // This struct is used when the selection changes to cache the old and new state of the selection for each RenderBlock.
  81 class RenderBlockSelectionInfo : public RenderSelectionInfoBase {
  82 public:
  83     RenderBlockSelectionInfo(RenderBlock* b)
  84         : RenderSelectionInfoBase(b)
  85         , m_rects(b->needsLayout() ? GapRects() : block()->selectionGapRectsForRepaint(m_repaintContainer))
  86     {
  87     }
  88
  89     void repaint()
  90     {
  91         m_object->repaintUsingContainer(m_repaintContainer, m_rects);
  92     }
  93
  94     RenderBlock* block() const { ASSERT(m_object->isRenderBlock()); return static_cast<RenderBlock*>(m_object); }
  95     GapRects rects() const { return m_rects; }
  96
  97 private:
  98     GapRects m_rects; // relative to repaint container
  99 };
 100
 101 } // namespace WebCore
 102
 103
 104 #endif // SelectionInfo_h