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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/. */
#include "nsDocShellEnumerator.h"
#include "nsDocShell.h"
using namespace mozilla;
nsDocShellEnumerator::nsDocShellEnumerator(
nsDocShellEnumerator::EnumerationDirection aDirection,
int32_t aDocShellType, nsDocShell& aRootItem)
: mRootItem(&aRootItem),
mDocShellType(aDocShellType),
mDirection(aDirection) {}
nsresult nsDocShellEnumerator::BuildDocShellArray(
nsTArray<RefPtr<nsIDocShell>>& aItemArray) {
MOZ_ASSERT(mRootItem);
aItemArray.Clear();
if (mDirection == EnumerationDirection::Forwards) {
return BuildArrayRecursiveForwards(mRootItem, aItemArray);
}
MOZ_ASSERT(mDirection == EnumerationDirection::Backwards);
return BuildArrayRecursiveBackwards(mRootItem, aItemArray);
}
nsresult nsDocShellEnumerator::BuildArrayRecursiveForwards(
nsDocShell* aItem, nsTArray<RefPtr<nsIDocShell>>& aItemArray) {
nsresult rv;
// add this item to the array
if (mDocShellType == nsIDocShellTreeItem::typeAll ||
aItem->ItemType() == mDocShellType) {
if (!aItemArray.AppendElement(aItem, fallible)) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
int32_t numChildren = aItem->ChildCount();
for (int32_t i = 0; i < numChildren; ++i) {
RefPtr<nsDocShell> curChild = aItem->GetInProcessChildAt(i);
MOZ_ASSERT(curChild);
rv = BuildArrayRecursiveForwards(curChild, aItemArray);
if (NS_FAILED(rv)) {
return rv;
}
}
return NS_OK;
}
nsresult nsDocShellEnumerator::BuildArrayRecursiveBackwards(
nsDocShell* aItem, nsTArray<RefPtr<nsIDocShell>>& aItemArray) {
nsresult rv;
uint32_t numChildren = aItem->ChildCount();
for (int32_t i = numChildren - 1; i >= 0; --i) {
RefPtr<nsDocShell> curChild = aItem->GetInProcessChildAt(i);
MOZ_ASSERT(curChild);
rv = BuildArrayRecursiveBackwards(curChild, aItemArray);
if (NS_FAILED(rv)) {
return rv;
}
}
// add this item to the array
if (mDocShellType == nsIDocShellTreeItem::typeAll ||
aItem->ItemType() == mDocShellType) {
if (!aItemArray.AppendElement(aItem, fallible)) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
return NS_OK;
}