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 blink {
  39
  40 class ShadowRootRareData : public NoBaseWillBeGarbageCollected<ShadowRootRareData> {
  41     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(ShadowRootRareData);
  42 public:
  43     ShadowRootRareData()
  44         : m_descendantShadowElementCount(0)
  45         , m_descendantContentElementCount(0)
  46         , m_childShadowRootCount(0)
  47     {
  48     }
  49
  50     HTMLShadowElement* shadowInsertionPointOfYoungerShadowRoot() const { return m_shadowInsertionPointOfYoungerShadowRoot.get(); }
  51     void setShadowInsertionPointOfYoungerShadowRoot(PassRefPtrWillBeRawPtr<HTMLShadowElement> shadowInsertionPoint) { m_shadowInsertionPointOfYoungerShadowRoot = shadowInsertionPoint; }
  52
  53     void didAddInsertionPoint(InsertionPoint*);
  54     void didRemoveInsertionPoint(InsertionPoint*);
  55
  56     bool containsShadowElements() const { return m_descendantShadowElementCount; }
  57     bool containsContentElements() const { return m_descendantContentElementCount; }
  58     bool containsShadowRoots() const { return m_childShadowRootCount; }
  59
  60     unsigned descendantShadowElementCount() const { return m_descendantShadowElementCount; }
  61
  62     void didAddChildShadowRoot() { ++m_childShadowRootCount; }
  63     void didRemoveChildShadowRoot() { ASSERT(m_childShadowRootCount > 0); --m_childShadowRootCount; }
  64
  65     unsigned childShadowRootCount() const { return m_childShadowRootCount; }
  66
  67     const WillBeHeapVector<RefPtrWillBeMember<InsertionPoint>>& descendantInsertionPoints() { return m_descendantInsertionPoints; }
  68     void setDescendantInsertionPoints(WillBeHeapVector<RefPtrWillBeMember<InsertionPoint>>& list) { m_descendantInsertionPoints.swap(list); }
  69     void clearDescendantInsertionPoints() { m_descendantInsertionPoints.clear(); }
  70
  71     StyleSheetList* styleSheets() { return m_styleSheetList.get(); }
  72     void setStyleSheets(PassRefPtrWillBeRawPtr<StyleSheetList> styleSheetList) { m_styleSheetList = styleSheetList; }
  73
  74     DEFINE_INLINE_TRACE()
  75     {
  76         visitor->trace(m_shadowInsertionPointOfYoungerShadowRoot);
  77         visitor->trace(m_descendantInsertionPoints);
  78         visitor->trace(m_styleSheetList);
  79     }
  80
  81 private:
  82     RefPtrWillBeMember<HTMLShadowElement> m_shadowInsertionPointOfYoungerShadowRoot;
  83     unsigned m_descendantShadowElementCount;
  84     unsigned m_descendantContentElementCount;
  85     unsigned m_childShadowRootCount;
  86     WillBeHeapVector<RefPtrWillBeMember<InsertionPoint>> m_descendantInsertionPoints;
  87     RefPtrWillBeMember<StyleSheetList> m_styleSheetList;
  88 };
  89
  90 inline void ShadowRootRareData::didAddInsertionPoint(InsertionPoint* point)
  91 {
  92     ASSERT(point);
  93     if (isHTMLShadowElement(*point))
  94         ++m_descendantShadowElementCount;
  95     else if (isHTMLContentElement(*point))
  96         ++m_descendantContentElementCount;
  97     else
  98         ASSERT_NOT_REACHED();
  99 }
 100
 101 inline void ShadowRootRareData::didRemoveInsertionPoint(InsertionPoint* point)
 102 {
 103     ASSERT(point);
 104     if (isHTMLShadowElement(*point))
 105         --m_descendantShadowElementCount;
 106     else if (isHTMLContentElement(*point))
 107         --m_descendantContentElementCount;
 108     else
 109         ASSERT_NOT_REACHED();
 110
 111     ASSERT(m_descendantContentElementCount >= 0);
 112     ASSERT(m_descendantShadowElementCount >= 0);
 113 }
 114
 115 } // namespace blink
 116
 117 #endif