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/* -*- 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/. */
#ifndef nsNameSpaceManager_h___
#define nsNameSpaceManager_h___
#include "nsDataHashtable.h"
#include "nsTArray.h"
#include "mozilla/StaticPtr.h"
class nsIAtom;
class nsAString;
class nsNameSpaceKey : public PLDHashEntryHdr
{
public:
typedef const nsAString* KeyType;
typedef const nsAString* KeyTypePointer;
explicit nsNameSpaceKey(KeyTypePointer aKey) : mKey(aKey)
{
}
nsNameSpaceKey(const nsNameSpaceKey& toCopy) : mKey(toCopy.mKey)
{
}
KeyType GetKey() const
{
return mKey;
}
bool KeyEquals(KeyType aKey) const
{
return mKey->Equals(*aKey);
}
static KeyTypePointer KeyToPointer(KeyType aKey)
{
return aKey;
}
static PLDHashNumber HashKey(KeyTypePointer aKey) {
return mozilla::HashString(*aKey);
}
enum {
ALLOW_MEMMOVE = true
};
private:
const nsAString* mKey;
};
/**
* The Name Space Manager tracks the association between a NameSpace
* URI and the int32_t runtime id. Mappings between NameSpaces and
* NameSpace prefixes are managed by nsINameSpaces.
*
* All NameSpace URIs are stored in a global table so that IDs are
* consistent accross the app. NameSpace IDs are only consistent at runtime
* ie: they are not guaranteed to be consistent accross app sessions.
*
* The nsNameSpaceManager needs to have a live reference for as long as
* the NameSpace IDs are needed.
*
*/
class nsNameSpaceManager final
{
public:
virtual ~nsNameSpaceManager() {}
virtual nsresult RegisterNameSpace(const nsAString& aURI,
int32_t& aNameSpaceID);
virtual nsresult GetNameSpaceURI(int32_t aNameSpaceID, nsAString& aURI);
virtual int32_t GetNameSpaceID(const nsAString& aURI);
virtual bool HasElementCreator(int32_t aNameSpaceID);
static nsNameSpaceManager* GetInstance();
private:
bool Init();
nsresult AddNameSpace(const nsAString& aURI, const int32_t aNameSpaceID);
nsDataHashtable<nsNameSpaceKey,int32_t> mURIToIDTable;
nsTArray< nsAutoPtr<nsString> > mURIArray;
static mozilla::StaticAutoPtr<nsNameSpaceManager> sInstance;
};
#endif // nsNameSpaceManager_h___
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