1 files changed, 121 insertions, 0 deletions
diff --git a/dom/base/nsMappedAttributes.h b/dom/base/nsMappedAttributes.h
new file mode 100644
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+++ b/dom/base/nsMappedAttributes.h
@@ -0,0 +1,121 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * A unique per-element set of attributes that is used as an
+ * nsIStyleRule; used to implement presentational attributes.
+ */
+
+#ifndef nsMappedAttributes_h___
+#define nsMappedAttributes_h___
+
+#include "nsAttrAndChildArray.h"
+#include "nsMappedAttributeElement.h"
+#include "nsIStyleRule.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/MemoryReporting.h"
+
+class nsIAtom;
+class nsHTMLStyleSheet;
+
+class nsMappedAttributes final : public nsIStyleRule
+{
+public:
+  nsMappedAttributes(nsHTMLStyleSheet* aSheet,
+                     nsMapRuleToAttributesFunc aMapRuleFunc);
+
+  // Do not return null.
+  void* operator new(size_t size, uint32_t aAttrCount = 1) CPP_THROW_NEW;
+  nsMappedAttributes* Clone(bool aWillAddAttr);
+
+  NS_DECL_ISUPPORTS
+
+  void SetAndTakeAttr(nsIAtom* aAttrName, nsAttrValue& aValue);
+  const nsAttrValue* GetAttr(nsIAtom* aAttrName) const;
+  const nsAttrValue* GetAttr(const nsAString& aAttrName) const;
+
+  uint32_t Count() const
+  {
+    return mAttrCount;
+  }
+
+  bool Equals(const nsMappedAttributes* aAttributes) const;
+  uint32_t HashValue() const;
+
+  void DropStyleSheetReference()
+  {
+    mSheet = nullptr;
+  }
+  void SetStyleSheet(nsHTMLStyleSheet* aSheet);
+  nsHTMLStyleSheet* GetStyleSheet()
+  {
+    return mSheet;
+  }
+
+  const nsAttrName* NameAt(uint32_t aPos) const
+  {
+    NS_ASSERTION(aPos < mAttrCount, "out-of-bounds");
+    return &Attrs()[aPos].mName;
+  }
+  const nsAttrValue* AttrAt(uint32_t aPos) const
+  {
+    NS_ASSERTION(aPos < mAttrCount, "out-of-bounds");
+    return &Attrs()[aPos].mValue;
+  }
+  // Remove the attr at position aPos.  The value of the attr is placed in
+  // aValue; any value that was already in aValue is destroyed.
+  void RemoveAttrAt(uint32_t aPos, nsAttrValue& aValue);
+  const nsAttrName* GetExistingAttrNameFromQName(const nsAString& aName) const;
+  int32_t IndexOfAttr(nsIAtom* aLocalName) const;
+  
+
+  // nsIStyleRule 
+  virtual void MapRuleInfoInto(nsRuleData* aRuleData) override;
+  virtual bool MightMapInheritedStyleData() override;
+  virtual bool GetDiscretelyAnimatedCSSValue(nsCSSPropertyID aProperty,
+                                             nsCSSValue* aValue) override;
+#ifdef DEBUG
+  virtual void List(FILE* out = stdout, int32_t aIndent = 0) const override;
+#endif
+
+  size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
+
+private:
+  nsMappedAttributes(const nsMappedAttributes& aCopy);
+  ~nsMappedAttributes();
+
+  struct InternalAttr
+  {
+    nsAttrName mName;
+    nsAttrValue mValue;
+  };
+
+  /**
+   * Due to a compiler bug in VisualAge C++ for AIX, we need to return the
+   * address of the first index into mAttrs here, instead of simply
+   * returning mAttrs itself.
+   *
+   * See Bug 231104 for more information.
+   */
+  const InternalAttr* Attrs() const
+  {
+    return reinterpret_cast<const InternalAttr*>(&(mAttrs[0]));
+  }
+  InternalAttr* Attrs()
+  {
+    return reinterpret_cast<InternalAttr*>(&(mAttrs[0]));
+  }
+
+  uint16_t mAttrCount;
+#ifdef DEBUG
+  uint16_t mBufferSize;
+#endif
+  nsHTMLStyleSheet* mSheet; //weak
+  nsMapRuleToAttributesFunc mRuleMapper;
+  void* mAttrs[1];
+};
+
+#endif /* nsMappedAttributes_h___ */