src/third_party/WebKit/Source/core/dom/shadow/ShadowRootRareData.h

   1 /*
   2  * Copyright (C) 2013 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #ifndef ShadowRootRareData_h
  32 #define ShadowRootRareData_h
  33
  34 #include "core/dom/shadow/InsertionPoint.h"
  35 #include "wtf/RefPtr.h"
  36 #include "wtf/Vector.h"
  37
  38 namespace WebCore {
  39
  40 class ShadowRootRareData : public NoBaseWillBeGarbageCollectedFinalized<ShadowRootRareData> {
  41 public:
  42     ShadowRootRareData()
  43         : m_descendantShadowElementCount(0)
  44         , m_descendantContentElementCount(0)
  45         , m_childShadowRootCount(0)
  46     {
  47     }
  48
  49     HTMLShadowElement* shadowInsertionPointOfYoungerShadowRoot() const { return m_shadowInsertionPointOfYoungerShadowRoot.get(); }
  50     void setShadowInsertionPointOfYoungerShadowRoot(PassRefPtr<HTMLShadowElement> shadowInsertionPoint) { m_shadowInsertionPointOfYoungerShadowRoot = shadowInsertionPoint; }
  51
  52     void didAddInsertionPoint(InsertionPoint*);
  53     void didRemoveInsertionPoint(InsertionPoint*);
  54
  55     bool containsShadowElements() const { return m_descendantShadowElementCount; }
  56     bool containsContentElements() const { return m_descendantContentElementCount; }
  57     bool containsShadowRoots() const { return m_childShadowRootCount; }
  58
  59     unsigned descendantShadowElementCount() const { return m_descendantShadowElementCount; }
  60
  61     void didAddChildShadowRoot() { ++m_childShadowRootCount; }
  62     void didRemoveChildShadowRoot() { ASSERT(m_childShadowRootCount > 0); --m_childShadowRootCount; }
  63
  64     unsigned childShadowRootCount() const { return m_childShadowRootCount; }
  65
  66     const Vector<RefPtr<InsertionPoint> >& descendantInsertionPoints() { return m_descendantInsertionPoints; }
  67     void setDescendantInsertionPoints(Vector<RefPtr<InsertionPoint> >& list) { m_descendantInsertionPoints.swap(list); }
  68     void clearDescendantInsertionPoints() { m_descendantInsertionPoints.clear(); }
  69
  70     StyleSheetList* styleSheets() { return m_styleSheetList.get(); }
  71     void setStyleSheets(PassRefPtrWillBeRawPtr<StyleSheetList> styleSheetList) { m_styleSheetList = styleSheetList; }
  72
  73     void trace(Visitor* visitor) { visitor->trace(m_styleSheetList); }
  74
  75 private:
  76     RefPtr<HTMLShadowElement> m_shadowInsertionPointOfYoungerShadowRoot;
  77     unsigned m_descendantShadowElementCount;
  78     unsigned m_descendantContentElementCount;
  79     unsigned m_childShadowRootCount;
  80     Vector<RefPtr<InsertionPoint> > m_descendantInsertionPoints;
  81     RefPtrWillBeMember<StyleSheetList> m_styleSheetList;
  82 };
  83
  84 inline void ShadowRootRareData::didAddInsertionPoint(InsertionPoint* point)
  85 {
  86     ASSERT(point);
  87     if (isHTMLShadowElement(*point))
  88         ++m_descendantShadowElementCount;
  89     else if (isHTMLContentElement(*point))
  90         ++m_descendantContentElementCount;
  91     else
  92         ASSERT_NOT_REACHED();
  93 }
  94
  95 inline void ShadowRootRareData::didRemoveInsertionPoint(InsertionPoint* point)
  96 {
  97     ASSERT(point);
  98     if (isHTMLShadowElement(*point))
  99         --m_descendantShadowElementCount;
 100     else if (isHTMLContentElement(*point))
 101         --m_descendantContentElementCount;
 102     else
 103         ASSERT_NOT_REACHED();
 104
 105     ASSERT(m_descendantContentElementCount >= 0);
 106     ASSERT(m_descendantShadowElementCount >= 0);
 107 }
 108
 109 } // namespace WebCore
 110
 111 #endif