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