third_party/WebKit/Source/core/css/TreeBoundaryCrossingRules.cpp

   1 /*
   2  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
   3  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
   4  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
   5  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
   6  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
   7  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
   8  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
   9  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  10  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
  11  * Copyright (C) 2013 Google Inc. All rights reserved.
  12  *
  13  * This library is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU Library General Public
  15  * License as published by the Free Software Foundation; either
  16  * version 2 of the License, or (at your option) any later version.
  17  *
  18  * This library is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21  * Library General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU Library General Public License
  24  * along with this library; see the file COPYING.LIB.  If not, write to
  25  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  26  * Boston, MA 02110-1301, USA.
  27  */
  28
  29 #include "config.h"
  30 #include "core/css/TreeBoundaryCrossingRules.h"
  31
  32 #include "core/css/ElementRuleCollector.h"
  33 #include "core/css/StylePropertySet.h"
  34 #include "core/css/resolver/ScopedStyleResolver.h"
  35
  36 namespace blink {
  37
  38 void TreeBoundaryCrossingRules::collectTreeBoundaryCrossingRules(Element* element, ElementRuleCollector& collector, bool includeEmptyRules)
  39 {
  40     if (m_scopingNodes.isEmpty())
  41         return;
  42
  43     // When comparing rules declared in outer treescopes, outer's rules win.
  44     CascadeOrder outerCascadeOrder = size() + size();
  45     // When comparing rules declared in inner treescopes, inner's rules win.
  46     CascadeOrder innerCascadeOrder = size();
  47
  48     ASSERT(!collector.scopeContainsLastMatchedElement());
  49     collector.setScopeContainsLastMatchedElement(true);
  50
  51     for (const auto& scope : m_scopingNodes) {
  52
  53         bool isInnerTreeScope = element->treeScope().isInclusiveAncestorOf(scope->treeScope());
  54         CascadeOrder cascadeOrder = isInnerTreeScope ? innerCascadeOrder : outerCascadeOrder;
  55
  56         scope->treeScope().scopedStyleResolver()->collectMatchingTreeBoundaryCrossingRules(collector, includeEmptyRules, cascadeOrder);
  57
  58         ++innerCascadeOrder;
  59         --outerCascadeOrder;
  60     }
  61
  62     collector.setScopeContainsLastMatchedElement(false);
  63 }
  64
  65 void TreeBoundaryCrossingRules::addScope(ContainerNode& scopingNode)
  66 {
  67     m_scopingNodes.add(&scopingNode);
  68 }
  69
  70 void TreeBoundaryCrossingRules::removeScope(const ContainerNode& scopingNode)
  71 {
  72     m_scopingNodes.remove(&scopingNode);
  73 }
  74
  75 DEFINE_TRACE(TreeBoundaryCrossingRules)
  76 {
  77 #if ENABLE(OILPAN)
  78     visitor->trace(m_scopingNodes);
  79 #endif
  80 }
  81
  82 } // namespace blink