RetroZilla/extensions/transformiix/source/xpath/nsXPathResult.cpp

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2015-10-21 05:03:22 +02:00
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is TransforMiiX XSLT processor code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Peter Van der Beken <peterv@propagandism.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsXPathResult.h"
#include "ExprResult.h"
#include "txNodeSet.h"
#include "nsDOMError.h"
#include "nsIContent.h"
#include "nsIDOMClassInfo.h"
#include "nsIDOMNode.h"
#include "nsXPathException.h"
#include "nsIDOMDocument.h"
#include "nsDOMString.h"
nsXPathResult::nsXPathResult() : mDocument(nsnull),
mCurrentPos(0),
mResultType(ANY_TYPE),
mInvalidIteratorState(PR_TRUE)
{
}
nsXPathResult::~nsXPathResult()
{
if (mDocument) {
mDocument->RemoveObserver(this);
}
}
NS_IMPL_ADDREF(nsXPathResult)
NS_IMPL_RELEASE(nsXPathResult)
NS_INTERFACE_MAP_BEGIN(nsXPathResult)
NS_INTERFACE_MAP_ENTRY(nsIDOMXPathResult)
NS_INTERFACE_MAP_ENTRY(nsIDocumentObserver)
NS_INTERFACE_MAP_ENTRY(nsIXPathResult)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMXPathResult)
NS_INTERFACE_MAP_ENTRY_EXTERNAL_DOM_CLASSINFO(XPathResult)
NS_INTERFACE_MAP_END
NS_IMETHODIMP
nsXPathResult::GetResultType(PRUint16 *aResultType)
{
*aResultType = mResultType;
return NS_OK;
}
NS_IMETHODIMP
nsXPathResult::GetNumberValue(double *aNumberValue)
{
if (mResultType != NUMBER_TYPE) {
return NS_ERROR_DOM_TYPE_ERR;
}
*aNumberValue = mResult.get()->numberValue();
return NS_OK;
}
NS_IMETHODIMP
nsXPathResult::GetStringValue(nsAString &aStringValue)
{
if (mResultType != STRING_TYPE) {
return NS_ERROR_DOM_TYPE_ERR;
}
mResult.get()->stringValue(aStringValue);
return NS_OK;
}
NS_IMETHODIMP
nsXPathResult::GetBooleanValue(PRBool *aBooleanValue)
{
if (mResultType != BOOLEAN_TYPE) {
return NS_ERROR_DOM_TYPE_ERR;
}
*aBooleanValue = mResult.get()->booleanValue();
return NS_OK;
}
NS_IMETHODIMP
nsXPathResult::GetSingleNodeValue(nsIDOMNode **aSingleNodeValue)
{
if (!isNode()) {
return NS_ERROR_DOM_TYPE_ERR;
}
txNodeSet *nodeSet = NS_STATIC_CAST(txNodeSet*, mResult.get());
if (nodeSet->size() > 0) {
return txXPathNativeNode::getNode(nodeSet->get(0), aSingleNodeValue);
}
*aSingleNodeValue = nsnull;
return NS_OK;
}
NS_IMETHODIMP
nsXPathResult::GetInvalidIteratorState(PRBool *aInvalidIteratorState)
{
*aInvalidIteratorState = isIterator() && mInvalidIteratorState;
return NS_OK;
}
NS_IMETHODIMP
nsXPathResult::GetSnapshotLength(PRUint32 *aSnapshotLength)
{
if (!isSnapshot()) {
return NS_ERROR_DOM_TYPE_ERR;
}
txNodeSet *nodeSet = NS_STATIC_CAST(txNodeSet*, mResult.get());
*aSnapshotLength = (PRUint32)nodeSet->size();
return NS_OK;
}
NS_IMETHODIMP
nsXPathResult::IterateNext(nsIDOMNode **aResult)
{
if (!isIterator()) {
return NS_ERROR_DOM_TYPE_ERR;
}
if (mDocument) {
mDocument->FlushPendingNotifications(Flush_Content);
}
if (mInvalidIteratorState) {
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
txNodeSet *nodeSet = NS_STATIC_CAST(txNodeSet*, mResult.get());
if (mCurrentPos < (PRUint32)nodeSet->size()) {
return txXPathNativeNode::getNode(nodeSet->get(mCurrentPos++),
aResult);
}
*aResult = nsnull;
return NS_OK;
}
NS_IMETHODIMP
nsXPathResult::SnapshotItem(PRUint32 aIndex, nsIDOMNode **aResult)
{
if (!isSnapshot()) {
return NS_ERROR_DOM_TYPE_ERR;
}
txNodeSet *nodeSet = NS_STATIC_CAST(txNodeSet*, mResult.get());
if (aIndex < (PRUint32)nodeSet->size()) {
return txXPathNativeNode::getNode(nodeSet->get(aIndex), aResult);
}
*aResult = nsnull;
return NS_OK;
}
NS_IMPL_NSIDOCUMENTOBSERVER_CORE_STUB(nsXPathResult)
NS_IMPL_NSIDOCUMENTOBSERVER_LOAD_STUB(nsXPathResult)
NS_IMPL_NSIDOCUMENTOBSERVER_REFLOW_STUB(nsXPathResult)
NS_IMPL_NSIDOCUMENTOBSERVER_STYLE_STUB(nsXPathResult)
NS_IMPL_NSIDOCUMENTOBSERVER_STATE_STUB(nsXPathResult)
void
nsXPathResult::CharacterDataChanged(nsIDocument* aDocument,
nsIContent *aContent,
PRBool aAppend)
{
Invalidate();
}
void
nsXPathResult::AttributeChanged(nsIDocument* aDocument,
nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
Invalidate();
}
void
nsXPathResult::ContentAppended(nsIDocument* aDocument,
nsIContent* aContainer,
PRInt32 aNewIndexInContainer)
{
Invalidate();
}
void
nsXPathResult::ContentInserted(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
Invalidate();
}
void
nsXPathResult::ContentRemoved(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
Invalidate();
}
nsresult
nsXPathResult::SetExprResult(txAExprResult* aExprResult, PRUint16 aResultType)
{
mResultType = aResultType;
if ((isSnapshot() || isIterator() || isNode()) &&
aExprResult->getResultType() != txAExprResult::NODESET) {
return NS_ERROR_DOM_TYPE_ERR;
}
if (mDocument) {
mDocument->RemoveObserver(this);
mDocument = nsnull;
}
mResult.set(aExprResult);
if (!isIterator()) {
return NS_OK;
}
mInvalidIteratorState = PR_FALSE;
txNodeSet* nodeSet = NS_STATIC_CAST(txNodeSet*, aExprResult);
nsCOMPtr<nsIDOMNode> node;
if (nodeSet->size() > 0) {
nsresult rv = txXPathNativeNode::getNode(nodeSet->get(0),
getter_AddRefs(node));
NS_ENSURE_SUCCESS(rv, rv);
// If we support the document() function in DOM-XPath we need to
// observe all documents that we have resultnodes in.
nsCOMPtr<nsIDOMDocument> document;
node->GetOwnerDocument(getter_AddRefs(document));
if (document) {
mDocument = do_QueryInterface(document);
}
else {
mDocument = do_QueryInterface(node);
}
NS_ASSERTION(mDocument, "We need a document!");
if (mDocument) {
mDocument->AddObserver(this);
}
}
return NS_OK;
}
void
nsXPathResult::Invalidate()
{
if (mDocument) {
mDocument->RemoveObserver(this);
mDocument = nsnull;
}
mInvalidIteratorState = PR_TRUE;
}
nsresult
nsXPathResult::GetExprResult(txAExprResult** aExprResult)
{
if (isIterator() && mInvalidIteratorState) {
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
*aExprResult = mResult.get();
if (!*aExprResult) {
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
NS_ADDREF(*aExprResult);
return NS_OK;
}
nsresult
nsXPathResult::Clone(nsIXPathResult **aResult)
{
*aResult = nsnull;
if (isIterator() && mInvalidIteratorState) {
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
nsCOMPtr<nsIXPathResult> result = new nsXPathResult();
if (!result) {
return NS_ERROR_OUT_OF_MEMORY;
}
nsresult rv = result->SetExprResult(mResult.get(), mResultType);
NS_ENSURE_SUCCESS(rv, rv);
result.swap(*aResult);
return NS_OK;
}
void
txResultHolder::set(txAExprResult *aResult)
{
releaseNodeSet();
// XXX This will keep the recycler alive, should we clear it?
mResult = aResult;
if (mResult && mResult->getResultType() == txAExprResult::NODESET) {
txNodeSet *nodeSet =
NS_STATIC_CAST(txNodeSet*,
NS_STATIC_CAST(txAExprResult*, mResult));
PRInt32 i, count = nodeSet->size();
for (i = 0; i < count; ++i) {
txXPathNativeNode::addRef(nodeSet->get(i));
}
}
}
void
txResultHolder::releaseNodeSet()
{
if (mResult && mResult->getResultType() == txAExprResult::NODESET) {
txNodeSet *nodeSet =
NS_STATIC_CAST(txNodeSet*,
NS_STATIC_CAST(txAExprResult*, mResult));
PRInt32 i, count = nodeSet->size();
for (i = 0; i < count; ++i) {
txXPathNativeNode::release(nodeSet->get(i));
}
}
}