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: #ifndef nsNameSpaceManager_h___
michael@0: #define nsNameSpaceManager_h___
michael@0: 
michael@0: #include "nsDataHashtable.h"
michael@0: #include "nsTArray.h"
michael@0: 
michael@0: #include "mozilla/StaticPtr.h"
michael@0: 
michael@0: class nsIAtom;
michael@0: class nsAString;
michael@0: 
michael@0: #define kNameSpaceID_Unknown -1
michael@0: // 0 is special at C++, so use a static const int32_t for
michael@0: // kNameSpaceID_None to keep if from being cast to pointers
michael@0: // Note that the XBL cache assumes (and asserts) that it can treat a
michael@0: // single-byte value higher than kNameSpaceID_LastBuiltin specially. 
michael@0: static const int32_t kNameSpaceID_None = 0;
michael@0: #define kNameSpaceID_XMLNS    1 // not really a namespace, but it needs to play the game
michael@0: #define kNameSpaceID_XML      2
michael@0: #define kNameSpaceID_XHTML    3
michael@0: #define kNameSpaceID_XLink    4
michael@0: #define kNameSpaceID_XSLT     5
michael@0: #define kNameSpaceID_XBL      6
michael@0: #define kNameSpaceID_MathML   7
michael@0: #define kNameSpaceID_RDF      8
michael@0: #define kNameSpaceID_XUL      9
michael@0: #define kNameSpaceID_SVG      10
michael@0: #define kNameSpaceID_LastBuiltin          10 // last 'built-in' namespace
michael@0: 
michael@0: class nsNameSpaceKey : public PLDHashEntryHdr
michael@0: {
michael@0: public:
michael@0:   typedef const nsAString* KeyType;
michael@0:   typedef const nsAString* KeyTypePointer;
michael@0: 
michael@0:   nsNameSpaceKey(KeyTypePointer aKey) : mKey(aKey)
michael@0:   {
michael@0:   }
michael@0:   nsNameSpaceKey(const nsNameSpaceKey& toCopy) : mKey(toCopy.mKey)
michael@0:   {
michael@0:   }
michael@0: 
michael@0:   KeyType GetKey() const
michael@0:   {
michael@0:     return mKey;
michael@0:   }
michael@0:   bool KeyEquals(KeyType aKey) const
michael@0:   {
michael@0:     return mKey->Equals(*aKey);
michael@0:   }
michael@0: 
michael@0:   static KeyTypePointer KeyToPointer(KeyType aKey)
michael@0:   {
michael@0:     return aKey;
michael@0:   }
michael@0:   static PLDHashNumber HashKey(KeyTypePointer aKey) {
michael@0:     return mozilla::HashString(*aKey);
michael@0:   }
michael@0: 
michael@0:   enum {
michael@0:     ALLOW_MEMMOVE = true
michael@0:   };
michael@0: 
michael@0: private:
michael@0:   const nsAString* mKey;
michael@0: };
michael@0:  
michael@0: /**
michael@0:  * The Name Space Manager tracks the association between a NameSpace
michael@0:  * URI and the int32_t runtime id. Mappings between NameSpaces and 
michael@0:  * NameSpace prefixes are managed by nsINameSpaces.
michael@0:  *
michael@0:  * All NameSpace URIs are stored in a global table so that IDs are
michael@0:  * consistent accross the app. NameSpace IDs are only consistent at runtime
michael@0:  * ie: they are not guaranteed to be consistent accross app sessions.
michael@0:  *
michael@0:  * The nsNameSpaceManager needs to have a live reference for as long as
michael@0:  * the NameSpace IDs are needed.
michael@0:  *
michael@0:  */
michael@0: 
michael@0: class nsNameSpaceManager
michael@0: {
michael@0: public:
michael@0:   virtual ~nsNameSpaceManager() {}
michael@0: 
michael@0:   virtual nsresult RegisterNameSpace(const nsAString& aURI,
michael@0:                                      int32_t& aNameSpaceID);
michael@0: 
michael@0:   virtual nsresult GetNameSpaceURI(int32_t aNameSpaceID, nsAString& aURI);
michael@0:   virtual int32_t GetNameSpaceID(const nsAString& aURI);
michael@0: 
michael@0:   virtual bool HasElementCreator(int32_t aNameSpaceID);
michael@0: 
michael@0:   static nsNameSpaceManager* GetInstance();
michael@0: private:
michael@0:   bool Init();
michael@0:   nsresult AddNameSpace(const nsAString& aURI, const int32_t aNameSpaceID);
michael@0: 
michael@0:   nsDataHashtable<nsNameSpaceKey,int32_t> mURIToIDTable;
michael@0:   nsTArray< nsAutoPtr<nsString> > mURIArray;
michael@0: 
michael@0:   static mozilla::StaticAutoPtr<nsNameSpaceManager> sInstance;
michael@0: };
michael@0:  
michael@0: #endif // nsNameSpaceManager_h___