The Tor Browser: content/base/src/nsDOMAttributeMap.h@6474c204b198 (annotated)

content/base/src/nsDOMAttributeMap.h@6474c204b198 (annotated)

content/base/src/nsDOMAttributeMap.h

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* 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/. */
 /*
  * Implementation of the |attributes| property of DOM Core's Element object.
  */
 #ifndef nsDOMAttributeMap_h
 #define nsDOMAttributeMap_h
 #include "mozilla/MemoryReporting.h"
 #include "mozilla/dom/Attr.h"
 #include "mozilla/ErrorResult.h"
 #include "nsCycleCollectionParticipant.h"
 #include "nsIDOMMozNamedAttrMap.h"
 #include "nsRefPtrHashtable.h"
 #include "nsString.h"
 #include "nsWrapperCache.h"
 class nsIAtom;
 class nsINodeInfo;
 class nsIDocument;
 /**
  * Structure used as a key for caching Attrs in nsDOMAttributeMap's mAttributeCache.
  */
 class nsAttrKey
 {
 public:
   /**
    * The namespace of the attribute
    */
   int32_t  mNamespaceID;
   /**
    * The atom for attribute, weak ref. is fine as we only use it for the
    * hashcode, we never dereference it.
    */
   nsIAtom* mLocalName;
   nsAttrKey(int32_t aNs, nsIAtom* aName)
     : mNamespaceID(aNs), mLocalName(aName) {}
   nsAttrKey(const nsAttrKey& aAttr)
     : mNamespaceID(aAttr.mNamespaceID), mLocalName(aAttr.mLocalName) {}
 };
 /**
  * PLDHashEntryHdr implementation for nsAttrKey.
  */
 class nsAttrHashKey : public PLDHashEntryHdr
 {
 public:
   typedef const nsAttrKey& KeyType;
   typedef const nsAttrKey* KeyTypePointer;
   nsAttrHashKey(KeyTypePointer aKey) : mKey(*aKey) {}
   nsAttrHashKey(const nsAttrHashKey& aCopy) : mKey(aCopy.mKey) {}
   ~nsAttrHashKey() {}
   KeyType GetKey() const { return mKey; }
   bool KeyEquals(KeyTypePointer aKey) const
     {
       return mKey.mLocalName == aKey->mLocalName &&
              mKey.mNamespaceID == aKey->mNamespaceID;
     }
   static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; }
   static PLDHashNumber HashKey(KeyTypePointer aKey)
     {
       if (!aKey)
         return 0;
       return mozilla::HashGeneric(aKey->mNamespaceID, aKey->mLocalName);
     }
   enum { ALLOW_MEMMOVE = true };
 private:
   nsAttrKey mKey;
 };
 // Helper class that implements the nsIDOMMozNamedAttrMap interface.
 class nsDOMAttributeMap : public nsIDOMMozNamedAttrMap
                         , public nsWrapperCache
 {
 public:
   typedef mozilla::dom::Attr Attr;
   typedef mozilla::dom::Element Element;
   typedef mozilla::ErrorResult ErrorResult;
   nsDOMAttributeMap(Element *aContent);
   virtual ~nsDOMAttributeMap();
   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
   NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS(nsDOMAttributeMap)
   // nsIDOMMozNamedAttrMap interface
   NS_DECL_NSIDOMMOZNAMEDATTRMAP
   void DropReference();
   Element* GetContent()
   {
     return mContent;
   }
   /**
    * Called when mContent is moved into a new document.
    * Updates the nodeinfos of all owned nodes.
    */
   nsresult SetOwnerDocument(nsIDocument* aDocument);
   /**
    * Drop an attribute from the map's cache (does not remove the attribute
    * from the node!)
    */
   void DropAttribute(int32_t aNamespaceID, nsIAtom* aLocalName);
   /**
    * Returns the number of attribute nodes currently in the map.
    * Note: this is just the number of cached attribute nodes, not the number of
    * attributes in mContent.
    *
    * @return The number of attribute nodes in the map.
    */
   uint32_t Count() const;
   typedef nsRefPtrHashtable<nsAttrHashKey, Attr> AttrCache;
   /**
    * Enumerates over the attribute nodess in the map and calls aFunc for each
    * one. If aFunc returns PL_DHASH_STOP we'll stop enumerating at that point.
    *
    * @return The number of attribute nodes that aFunc was called for.
    */
   uint32_t Enumerate(AttrCache::EnumReadFunction aFunc, void *aUserArg) const;
   Element* GetParentObject() const
   {
     return mContent;
   }
   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
   // WebIDL
   Attr* GetNamedItem(const nsAString& aAttrName);
   Attr* NamedGetter(const nsAString& aAttrName, bool& aFound);
   bool NameIsEnumerable(const nsAString& aName);
   already_AddRefed<Attr>
   SetNamedItem(Attr& aAttr, ErrorResult& aError)
   {
     return SetNamedItemInternal(aAttr, false, aError);
   }
   already_AddRefed<Attr>
   RemoveNamedItem(const nsAString& aName, ErrorResult& aError);
   Attr* Item(uint32_t aIndex);
   Attr* IndexedGetter(uint32_t aIndex, bool& aFound);
   uint32_t Length() const;
   Attr*
   GetNamedItemNS(const nsAString& aNamespaceURI,
                  const nsAString& aLocalName);
   already_AddRefed<Attr>
   SetNamedItemNS(Attr& aNode, ErrorResult& aError)
   {
     return SetNamedItemInternal(aNode, true, aError);
   }
   already_AddRefed<Attr>
   RemoveNamedItemNS(const nsAString& aNamespaceURI, const nsAString& aLocalName,
                     ErrorResult& aError);
   void GetSupportedNames(unsigned, nsTArray<nsString>& aNames)
   {
     // No supported names we want to show up in iteration.
   }
   size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
 private:
   nsCOMPtr<Element> mContent;
   /**
    * Cache of Attrs.
    */
   AttrCache mAttributeCache;
   /**
    * SetNamedItem() (aWithNS = false) and SetNamedItemNS() (aWithNS =
    * true) implementation.
    */
   already_AddRefed<Attr>
   SetNamedItemInternal(Attr& aNode, bool aWithNS, ErrorResult& aError);
   already_AddRefed<nsINodeInfo>
   GetAttrNodeInfo(const nsAString& aNamespaceURI,
                   const nsAString& aLocalName);
   Attr* GetAttribute(nsINodeInfo* aNodeInfo, bool aNsAware);
   /**
    * Remove an attribute, returns the removed node.
    */
   already_AddRefed<Attr> RemoveAttribute(nsINodeInfo* aNodeInfo);
 };
 // XXX khuey yes this is crazy.  The bindings code needs to see this include,
 // but if we pull it in at the top of the file we get a circular include
 // problem.
 #include "mozilla/dom/Element.h"
 #endif /* nsDOMAttributeMap_h */

The Tor Browser / annotate

content/base/src/nsDOMAttributeMap.h@6474c204b198 (annotated)

content/base/src/nsDOMAttributeMap.h