зеркало из https://github.com/mozilla/pjs.git
222 строки
6.3 KiB
C++
222 строки
6.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Mozilla browser.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications, Inc.
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* Portions created by the Initial Developer are Copyright (C) 1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsDocShellEnumerator.h"
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#include "nsIDocShellTreeItem.h"
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#include "nsIDocShellTreeNode.h"
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nsDocShellEnumerator::nsDocShellEnumerator(PRInt32 inEnumerationDirection)
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: mRootItem(nsnull)
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, mCurIndex(0)
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, mDocShellType(nsIDocShellTreeItem::typeAll)
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, mArrayValid(false)
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, mEnumerationDirection(inEnumerationDirection)
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{
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}
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nsDocShellEnumerator::~nsDocShellEnumerator()
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{
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}
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NS_IMPL_ISUPPORTS1(nsDocShellEnumerator, nsISimpleEnumerator)
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/* nsISupports getNext (); */
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NS_IMETHODIMP nsDocShellEnumerator::GetNext(nsISupports **outCurItem)
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{
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NS_ENSURE_ARG_POINTER(outCurItem);
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*outCurItem = nsnull;
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nsresult rv = EnsureDocShellArray();
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if (NS_FAILED(rv)) return rv;
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if (mCurIndex >= mItemArray.Length()) {
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return NS_ERROR_FAILURE;
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}
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// post-increment is important here
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nsCOMPtr<nsISupports> item = do_QueryReferent(mItemArray[mCurIndex++], &rv);
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item.forget(outCurItem);
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return rv;
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}
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/* boolean hasMoreElements (); */
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NS_IMETHODIMP nsDocShellEnumerator::HasMoreElements(bool *outHasMore)
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{
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NS_ENSURE_ARG_POINTER(outHasMore);
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*outHasMore = false;
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nsresult rv = EnsureDocShellArray();
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if (NS_FAILED(rv)) return rv;
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*outHasMore = (mCurIndex < mItemArray.Length());
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return NS_OK;
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}
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nsresult nsDocShellEnumerator::GetEnumerationRootItem(nsIDocShellTreeItem * *aEnumerationRootItem)
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{
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NS_ENSURE_ARG_POINTER(aEnumerationRootItem);
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nsCOMPtr<nsIDocShellTreeItem> item = do_QueryReferent(mRootItem);
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item.forget(aEnumerationRootItem);
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return NS_OK;
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}
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nsresult nsDocShellEnumerator::SetEnumerationRootItem(nsIDocShellTreeItem * aEnumerationRootItem)
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{
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mRootItem = do_GetWeakReference(aEnumerationRootItem);
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ClearState();
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return NS_OK;
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}
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nsresult nsDocShellEnumerator::GetEnumDocShellType(PRInt32 *aEnumerationItemType)
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{
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NS_ENSURE_ARG_POINTER(aEnumerationItemType);
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*aEnumerationItemType = mDocShellType;
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return NS_OK;
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}
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nsresult nsDocShellEnumerator::SetEnumDocShellType(PRInt32 aEnumerationItemType)
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{
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mDocShellType = aEnumerationItemType;
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ClearState();
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return NS_OK;
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}
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nsresult nsDocShellEnumerator::First()
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{
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mCurIndex = 0;
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return EnsureDocShellArray();
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}
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nsresult nsDocShellEnumerator::EnsureDocShellArray()
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{
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if (!mArrayValid)
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{
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mArrayValid = true;
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return BuildDocShellArray(mItemArray);
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}
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return NS_OK;
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}
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nsresult nsDocShellEnumerator::ClearState()
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{
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mItemArray.Clear();
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mArrayValid = false;
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mCurIndex = 0;
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return NS_OK;
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}
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nsresult nsDocShellEnumerator::BuildDocShellArray(nsTArray<nsWeakPtr>& inItemArray)
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{
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NS_ENSURE_TRUE(mRootItem, NS_ERROR_NOT_INITIALIZED);
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inItemArray.Clear();
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nsCOMPtr<nsIDocShellTreeItem> item = do_QueryReferent(mRootItem);
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return BuildArrayRecursive(item, inItemArray);
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}
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nsresult nsDocShellForwardsEnumerator::BuildArrayRecursive(nsIDocShellTreeItem* inItem, nsTArray<nsWeakPtr>& inItemArray)
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{
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nsresult rv;
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nsCOMPtr<nsIDocShellTreeNode> itemAsNode = do_QueryInterface(inItem, &rv);
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if (NS_FAILED(rv)) return rv;
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PRInt32 itemType;
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// add this item to the array
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if ((mDocShellType == nsIDocShellTreeItem::typeAll) ||
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(NS_SUCCEEDED(inItem->GetItemType(&itemType)) && (itemType == mDocShellType)))
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{
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if (!inItemArray.AppendElement(do_GetWeakReference(inItem)))
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return NS_ERROR_OUT_OF_MEMORY;
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}
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PRInt32 numChildren;
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rv = itemAsNode->GetChildCount(&numChildren);
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if (NS_FAILED(rv)) return rv;
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for (PRInt32 i = 0; i < numChildren; ++i)
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{
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nsCOMPtr<nsIDocShellTreeItem> curChild;
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rv = itemAsNode->GetChildAt(i, getter_AddRefs(curChild));
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if (NS_FAILED(rv)) return rv;
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rv = BuildArrayRecursive(curChild, inItemArray);
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if (NS_FAILED(rv)) return rv;
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}
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return NS_OK;
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}
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nsresult nsDocShellBackwardsEnumerator::BuildArrayRecursive(nsIDocShellTreeItem* inItem, nsTArray<nsWeakPtr>& inItemArray)
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{
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nsresult rv;
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nsCOMPtr<nsIDocShellTreeNode> itemAsNode = do_QueryInterface(inItem, &rv);
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if (NS_FAILED(rv)) return rv;
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PRInt32 numChildren;
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rv = itemAsNode->GetChildCount(&numChildren);
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if (NS_FAILED(rv)) return rv;
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for (PRInt32 i = numChildren - 1; i >= 0; --i)
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{
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nsCOMPtr<nsIDocShellTreeItem> curChild;
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rv = itemAsNode->GetChildAt(i, getter_AddRefs(curChild));
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if (NS_FAILED(rv)) return rv;
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rv = BuildArrayRecursive(curChild, inItemArray);
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if (NS_FAILED(rv)) return rv;
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}
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PRInt32 itemType;
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// add this item to the array
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if ((mDocShellType == nsIDocShellTreeItem::typeAll) ||
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(NS_SUCCEEDED(inItem->GetItemType(&itemType)) && (itemType == mDocShellType)))
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{
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if (!inItemArray.AppendElement(do_GetWeakReference(inItem)))
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return NS_OK;
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}
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