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/* -*- 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/. */
#ifndef nsDocShellEnumerator_h___
#define nsDocShellEnumerator_h___
#include "nsISimpleEnumerator.h"
#include "nsTArray.h"
#include "nsIWeakReferenceUtils.h"
class nsIDocShellTreeItem;
/*
// {13cbc281-35ae-11d5-be5b-bde0edece43c}
#define NS_DOCSHELL_FORWARDS_ENUMERATOR_CID \
{ 0x13cbc281, 0x35ae, 0x11d5, { 0xbe, 0x5b, 0xbd, 0xe0, 0xed, 0xec, 0xe4, 0x3c } }
#define NS_DOCSHELL_FORWARDS_ENUMERATOR_CONTRACTID \
"@mozilla.org/docshell/enumerator-forwards;1"
// {13cbc282-35ae-11d5-be5b-bde0edece43c}
#define NS_DOCSHELL_BACKWARDS_ENUMERATOR_CID \
{ 0x13cbc282, 0x35ae, 0x11d5, { 0xbe, 0x5b, 0xbd, 0xe0, 0xed, 0xec, 0xe4, 0x3c } }
#define NS_DOCSHELL_BACKWARDS_ENUMERATOR_CONTRACTID \
"@mozilla.org/docshell/enumerator-backwards;1"
*/
class nsDocShellEnumerator : public nsISimpleEnumerator
{
protected:
enum
{
enumerateForwards,
enumerateBackwards
};
virtual ~nsDocShellEnumerator();
public:
explicit nsDocShellEnumerator(int32_t aEnumerationDirection);
// nsISupports
NS_DECL_ISUPPORTS
// nsISimpleEnumerator
NS_DECL_NSISIMPLEENUMERATOR
public:
nsresult GetEnumerationRootItem(nsIDocShellTreeItem** aEnumerationRootItem);
nsresult SetEnumerationRootItem(nsIDocShellTreeItem* aEnumerationRootItem);
nsresult GetEnumDocShellType(int32_t* aEnumerationItemType);
nsresult SetEnumDocShellType(int32_t aEnumerationItemType);
nsresult First();
protected:
nsresult EnsureDocShellArray();
nsresult ClearState();
nsresult BuildDocShellArray(nsTArray<nsWeakPtr>& aItemArray);
virtual nsresult BuildArrayRecursive(nsIDocShellTreeItem* aItem,
nsTArray<nsWeakPtr>& aItemArray) = 0;
protected:
nsWeakPtr mRootItem; // weak ref!
nsTArray<nsWeakPtr> mItemArray; // flattened list of items with matching type
uint32_t mCurIndex;
int32_t mDocShellType; // only want shells of this type
bool mArrayValid; // is mItemArray up to date?
const int8_t mEnumerationDirection;
};
class nsDocShellForwardsEnumerator : public nsDocShellEnumerator
{
public:
nsDocShellForwardsEnumerator()
: nsDocShellEnumerator(enumerateForwards)
{
}
protected:
virtual nsresult BuildArrayRecursive(nsIDocShellTreeItem* aItem,
nsTArray<nsWeakPtr>& aItemArray);
};
class nsDocShellBackwardsEnumerator : public nsDocShellEnumerator
{
public:
nsDocShellBackwardsEnumerator()
: nsDocShellEnumerator(enumerateBackwards)
{
}
protected:
virtual nsresult BuildArrayRecursive(nsIDocShellTreeItem* aItem,
nsTArray<nsWeakPtr>& aItemArray);
};
#endif // nsDocShellEnumerator_h___
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