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      1 /*
      2  * Copyright (C) 2000 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 2000 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2000 Dirk Mueller (mueller (at) kde.org)
      5  *           (C) 2004 Allan Sandfeld Jensen (kde (at) 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 : public Noncopyable {
     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     RenderBoxModelObject* repaintContainer() const { return m_repaintContainer; }
     51     RenderObject::SelectionState state() const { return m_state; }
     52 
     53 protected:
     54     RenderObject* m_object;
     55     RenderBoxModelObject* 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 { return toRenderBlock(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
    105