Home | History | Annotate | Download | only in rendering 
      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 "core/rendering/RenderBox.h"
     29 #include "platform/geometry/IntRect.h"
     30 
     31 namespace blink {
     32 
     33 class RenderSelectionInfoBase : public NoBaseWillBeGarbageCollected<RenderSelectionInfoBase> {
     34     WTF_MAKE_NONCOPYABLE(RenderSelectionInfoBase); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
     35 public:
     36     RenderSelectionInfoBase()
     37         : m_object(nullptr)
     38         , m_paintInvalidationContainer(nullptr)
     39         , m_state(RenderObject::SelectionNone)
     40     {
     41     }
     42 
     43     RenderSelectionInfoBase(RenderObject* o)
     44         : m_object(o)
     45         , m_paintInvalidationContainer(o->isRooted() ? o->containerForPaintInvalidation() : nullptr)
     46         , m_state(o->selectionState())
     47     {
     48     }
     49 
     50     void trace(Visitor* visitor)
     51     {
     52         visitor->trace(m_object);
     53         visitor->trace(m_paintInvalidationContainer);
     54     }
     55 
     56     RenderObject* object() const { return m_object; }
     57     const RenderLayerModelObject* paintInvalidationContainer() const { return m_paintInvalidationContainer; }
     58     RenderObject::SelectionState state() const { return m_state; }
     59 
     60 protected:
     61     RawPtrWillBeMember<RenderObject> m_object;
     62     RawPtrWillBeMember<const RenderLayerModelObject> m_paintInvalidationContainer;
     63     RenderObject::SelectionState m_state;
     64 };
     65 
     66 // This struct is used when the selection changes to cache the old and new state of the selection for each RenderObject.
     67 class RenderSelectionInfo FINAL : public RenderSelectionInfoBase {
     68 public:
     69     RenderSelectionInfo(RenderObject* o)
     70         : RenderSelectionInfoBase(o)
     71     {
     72         if (m_paintInvalidationContainer && o->canUpdateSelectionOnRootLineBoxes()) {
     73             m_rect = o->selectionRectForPaintInvalidation(m_paintInvalidationContainer);
     74             // FIXME: groupedMapping() leaks the squashing abstraction. See RenderBlockSelectionInfo for more details.
     75             if (m_paintInvalidationContainer->layer()->groupedMapping())
     76                 RenderLayer::mapRectToPaintBackingCoordinates(m_paintInvalidationContainer, m_rect);
     77         } else {
     78             m_rect = LayoutRect();
     79         }
     80     }
     81 
     82     void invalidatePaint()
     83     {
     84         m_object->invalidatePaintUsingContainer(m_paintInvalidationContainer, enclosingIntRect(m_rect), InvalidationSelection);
     85     }
     86 
     87     LayoutRect rect() const { return m_rect; }
     88 
     89 private:
     90     LayoutRect m_rect; // relative to paint invalidation container
     91 };
     92 
     93 // This struct is used when the selection changes to cache the old and new state of the selection for each RenderBlock.
     94 class RenderBlockSelectionInfo FINAL : public RenderSelectionInfoBase {
     95 public:
     96     RenderBlockSelectionInfo(RenderBlock* b)
     97         : RenderSelectionInfoBase(b)
     98     {
     99         if (m_paintInvalidationContainer && b->canUpdateSelectionOnRootLineBoxes())
    100             m_rects = block()->selectionGapRectsForPaintInvalidation(m_paintInvalidationContainer);
    101         else
    102             m_rects = GapRects();
    103     }
    104 
    105     void invalidatePaint()
    106     {
    107         LayoutRect paintInvalidationRect = m_rects;
    108         // FIXME: this is leaking the squashing abstraction. However, removing the groupedMapping() condiitional causes
    109         // RenderBox::mapRectToPaintInvalidationBacking to get called, which makes rect adjustments even if you pass the same
    110         // paintInvalidationContainer as the render object. Find out why it does that and fix.
    111         if (m_paintInvalidationContainer && m_paintInvalidationContainer->layer()->groupedMapping())
    112             RenderLayer::mapRectToPaintBackingCoordinates(m_paintInvalidationContainer, paintInvalidationRect);
    113         m_object->invalidatePaintUsingContainer(m_paintInvalidationContainer, enclosingIntRect(paintInvalidationRect), InvalidationSelection);
    114     }
    115 
    116     RenderBlock* block() const { return toRenderBlock(m_object); }
    117     GapRects rects() const { return m_rects; }
    118 
    119 private:
    120     GapRects m_rects; // relative to paint invalidation container
    121 };
    122 
    123 } // namespace blink
    124 
    125 
    126 #endif // RenderSelectionInfo_h
    127