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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
      4  *
      5  * This library is free software; you can redistribute it and/or
      6  * modify it under the terms of the GNU Library General Public
      7  * License as published by the Free Software Foundation; either
      8  * version 2 of the License, or (at your option) any later version.
      9  *
     10  * This library is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13  * Library General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU Library General Public License
     16  * along with this library; see the file COPYING.LIB.  If not, write to
     17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18  * Boston, MA 02110-1301, USA.
     19  *
     20  */
     21 
     22 #ifndef PseudoStyleRequest_h
     23 #define PseudoStyleRequest_h
     24 
     25 #include "core/rendering/style/RenderStyleConstants.h"
     26 #include "platform/scroll/ScrollTypes.h"
     27 
     28 namespace blink {
     29 
     30 class RenderScrollbar;
     31 class RenderStyle;
     32 
     33 class PseudoStyleRequest {
     34 public:
     35 
     36     enum RequestType { ForRenderer, ForComputedStyle };
     37 
     38     PseudoStyleRequest(PseudoId pseudoId, RenderScrollbar* scrollbar = 0, ScrollbarPart scrollbarPart = NoPart)
     39         : pseudoId(pseudoId)
     40         , type(ForRenderer)
     41         , scrollbarPart(scrollbarPart)
     42         , scrollbar(scrollbar)
     43     {
     44     }
     45 
     46     PseudoStyleRequest(PseudoId pseudoId, RequestType requestType)
     47         : pseudoId(pseudoId)
     48         , type(requestType)
     49         , scrollbarPart(NoPart)
     50         , scrollbar(0)
     51     {
     52     }
     53 
     54     // The spec disallows inheritance for ::backdrop.
     55     bool allowsInheritance(const RenderStyle* parentStyle) const
     56     {
     57         return parentStyle && pseudoId != BACKDROP;
     58     }
     59 
     60     PseudoId pseudoId;
     61     RequestType type;
     62     ScrollbarPart scrollbarPart;
     63     RenderScrollbar* scrollbar;
     64 };
     65 
     66 } // namespace blink
     67 
     68 #endif // PseudoStyleRequest_h
     69