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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 RenderSelectionInfo_h
     26 #define RenderSelectionInfo_h
     27 
     28 #include "IntRect.h"
     29 #include "RenderBox.h"
     30 
     31 namespace WebCore {
     32 
     33 class RenderSelectionInfoBase {
     34     WTF_MAKE_NONCOPYABLE(RenderSelectionInfoBase); WTF_MAKE_FAST_ALLOCATED;
     35 public:
     36     RenderSelectionInfoBase()
     37         : m_object(0)
     38         , m_repaintContainer(0)
     39         , m_state(RenderObject::SelectionNone)
     40     {
     41     }
     42 
     43     RenderSelectionInfoBase(RenderObject* o)
     44         : m_object(o)
     45         , m_repaintContainer(o->containerForRepaint())
     46         , m_state(o->selectionState())
     47     {
     48     }
     49 
     50     RenderObject* object() const { return m_object; }
     51     RenderBoxModelObject* repaintContainer() const { return m_repaintContainer; }
     52     RenderObject::SelectionState state() const { return m_state; }
     53 
     54 protected:
     55     RenderObject* m_object;
     56     RenderBoxModelObject* m_repaintContainer;
     57     RenderObject::SelectionState m_state;
     58 };
     59 
     60 // This struct is used when the selection changes to cache the old and new state of the selection for each RenderObject.
     61 class RenderSelectionInfo : public RenderSelectionInfoBase {
     62 public:
     63     RenderSelectionInfo(RenderObject* o, bool clipToVisibleContent)
     64         : RenderSelectionInfoBase(o)
     65         , m_rect(o->needsLayout() ? IntRect() : o->selectionRectForRepaint(m_repaintContainer, clipToVisibleContent))
     66     {
     67     }
     68 
     69     void repaint()
     70     {
     71         m_object->repaintUsingContainer(m_repaintContainer, m_rect);
     72     }
     73 
     74     IntRect rect() const { return m_rect; }
     75 
     76 private:
     77     IntRect m_rect; // relative to repaint container
     78 };
     79 
     80 
     81 // This struct is used when the selection changes to cache the old and new state of the selection for each RenderBlock.
     82 class RenderBlockSelectionInfo : public RenderSelectionInfoBase {
     83 public:
     84     RenderBlockSelectionInfo(RenderBlock* b)
     85         : RenderSelectionInfoBase(b)
     86         , m_rects(b->needsLayout() ? GapRects() : block()->selectionGapRectsForRepaint(m_repaintContainer))
     87     {
     88     }
     89 
     90     void repaint()
     91     {
     92         m_object->repaintUsingContainer(m_repaintContainer, m_rects);
     93     }
     94 
     95     RenderBlock* block() const { return toRenderBlock(m_object); }
     96     GapRects rects() const { return m_rects; }
     97 
     98 private:
     99     GapRects m_rects; // relative to repaint container
    100 };
    101 
    102 } // namespace WebCore
    103 
    104 
    105 #endif // RenderSelectionInfo_h
    106