mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-09-19 11:40:21 +02:00
235 lines
6.9 KiB
C++
235 lines
6.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** 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) 2003
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Heikki Toivonen <heikki@netscape.com> (Original Author)
|
|
*
|
|
* 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 ***** */
|
|
|
|
/**
|
|
* This file implements the xpath1 XPointer scheme, and the xmlns scheme
|
|
* as well but only for xpath1.
|
|
*
|
|
* http://www.simonstl.com/ietf/draft-stlaurent-xpath-frag-00.html
|
|
*/
|
|
|
|
#include "nsXPath1Scheme.h"
|
|
#include "nsXPathEvaluator.h"
|
|
#include "nsXPathException.h"
|
|
#include "nsDOMError.h"
|
|
#include "nsXPathResult.h"
|
|
#include "nsIDOMNode.h"
|
|
#include "nsIDOMDocument.h"
|
|
#include "nsIDOMXPathNSResolver.h"
|
|
#include "nsIDOMRange.h"
|
|
#include "nsDOMString.h"
|
|
#include "nsIModifyableXPointer.h"
|
|
#include "nsAutoPtr.h"
|
|
#include "nsString.h"
|
|
|
|
#include "nsContentCID.h"
|
|
static NS_DEFINE_IID(kRangeCID, NS_RANGE_CID);
|
|
|
|
/**
|
|
* nsXPath1SchemeNSResolver
|
|
*
|
|
* This will effectively give us xmlns scheme support.
|
|
*/
|
|
class nsXPath1SchemeNSResolver : public nsIDOMXPathNSResolver
|
|
{
|
|
public:
|
|
nsXPath1SchemeNSResolver(nsIXPointerSchemeContext *aContext)
|
|
: mContext(aContext)
|
|
{
|
|
}
|
|
|
|
virtual ~nsXPath1SchemeNSResolver()
|
|
{
|
|
}
|
|
|
|
NS_DECL_ISUPPORTS
|
|
NS_DECL_NSIDOMXPATHNSRESOLVER
|
|
|
|
private:
|
|
nsCOMPtr<nsIXPointerSchemeContext> mContext;
|
|
};
|
|
|
|
NS_IMPL_ISUPPORTS1(nsXPath1SchemeNSResolver, nsIDOMXPathNSResolver)
|
|
|
|
//DOMString lookupNamespaceURI(in DOMString prefix);
|
|
NS_IMETHODIMP
|
|
nsXPath1SchemeNSResolver::LookupNamespaceURI(const nsAString &aPrefix,
|
|
nsAString &aURI)
|
|
{
|
|
aURI.Truncate();
|
|
|
|
// This method will be called each time the XPath engine encounters
|
|
// a prefix.
|
|
|
|
// We could cache the extracted prefix + URI pairs in a hash table,
|
|
// and do a lookup from that first. But typical XPointers only have
|
|
// a few scheme + data pairs (and only some of those will be xmlns
|
|
// schemes), and typical XPath expressions only have a few prefixes
|
|
// as well, so we'll see if we can manage without...
|
|
|
|
if (!mContext) {
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_NAMED_LITERAL_STRING(xmlns, "xmlns");
|
|
|
|
PRUint32 count;
|
|
mContext->GetCount(&count);
|
|
PRUint32 i;
|
|
for (i = 0; i < count; ++i) {
|
|
nsAutoString scheme, data;
|
|
mContext->GetSchemeData(i, scheme, data);
|
|
if (scheme.Equals(xmlns)) {
|
|
PRInt32 sep = data.FindChar('=');
|
|
if (sep > 0 && aPrefix.Equals(Substring(data, 0, sep))) {
|
|
aURI.Assign(Substring(data, sep + 1, data.Length() - sep - 1));
|
|
return NS_OK;
|
|
}
|
|
}
|
|
}
|
|
|
|
SetDOMStringToNull(aURI);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
// nsXPath1SchemeProcessor
|
|
nsXPath1SchemeProcessor::nsXPath1SchemeProcessor()
|
|
{
|
|
}
|
|
|
|
nsXPath1SchemeProcessor::~nsXPath1SchemeProcessor()
|
|
{
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS1(nsXPath1SchemeProcessor, nsIXPointerSchemeProcessor)
|
|
|
|
/**
|
|
* Evaluate.
|
|
*
|
|
* @param aDocument The document in which to resolve the XPointer.
|
|
* @param aContext The XPointer context in which to process aData.
|
|
* @param aData The data in the scheme that needs to be resolved.
|
|
* @return The result of the evaluation.
|
|
*/
|
|
NS_IMETHODIMP
|
|
nsXPath1SchemeProcessor::Evaluate(nsIDOMDocument *aDocument,
|
|
nsIXPointerSchemeContext *aContext,
|
|
const nsAString &aData,
|
|
nsIXPointerResult **aResult)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aDocument);
|
|
NS_ENSURE_ARG_POINTER(aContext);
|
|
NS_ENSURE_ARG_POINTER(aResult);
|
|
*aResult = nsnull;
|
|
|
|
// Resolve expression
|
|
nsCOMPtr<nsIDOMXPathNSResolver> nsresolver(new nsXPath1SchemeNSResolver(aContext));
|
|
if (!nsresolver) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
nsRefPtr<nsXPathEvaluator> e(new nsXPathEvaluator());
|
|
if (!e) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
nsCOMPtr<nsIDOMXPathResult> result;
|
|
nsresult rv = e->Evaluate(aData,
|
|
aDocument,
|
|
nsresolver,
|
|
nsIDOMXPathResult::ORDERED_NODE_ITERATOR_TYPE,
|
|
nsnull,
|
|
getter_AddRefs(result));
|
|
if (NS_FAILED(rv)) {
|
|
if ((rv == NS_ERROR_DOM_INVALID_EXPRESSION_ERR) ||
|
|
(rv == NS_ERROR_DOM_NAMESPACE_ERR) ||
|
|
(rv == NS_ERROR_DOM_TYPE_ERR)) {
|
|
// These errors are benign, change them to NS_OK so that
|
|
// we will not terminate the processor.
|
|
rv = NS_OK;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
// Create return result
|
|
// XXX perf: just store the XPathResult and resolve as XPointerResult on demand
|
|
nsCOMPtr<nsIXPointerResult> xpointerResult(
|
|
do_CreateInstance("@mozilla.org/xmlextras/xpointerresult;1", &rv));
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
nsCOMPtr<nsIModifyableXPointerResult> privatePointerResult(do_QueryInterface(xpointerResult));
|
|
if (!privatePointerResult) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsCOMPtr<nsIDOMNode> node;
|
|
rv = result->IterateNext(getter_AddRefs(node));
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Fill in return result
|
|
while (node) {
|
|
nsCOMPtr<nsIDOMRange> range(do_CreateInstance(kRangeCID, &rv));
|
|
if (NS_FAILED(rv))
|
|
break;
|
|
|
|
rv = range->SelectNode(node);
|
|
if (NS_FAILED(rv))
|
|
break;
|
|
|
|
rv = privatePointerResult->AppendRange(range);
|
|
if (NS_FAILED(rv))
|
|
break;
|
|
|
|
rv = result->IterateNext(getter_AddRefs(node));
|
|
if (NS_FAILED(rv))
|
|
break;
|
|
}
|
|
|
|
PRUint32 count;
|
|
xpointerResult->GetLength(&count);
|
|
if (NS_SUCCEEDED(rv) && (count > 0)) {
|
|
*aResult = xpointerResult;
|
|
NS_ADDREF(*aResult);
|
|
}
|
|
|
|
return rv;
|
|
}
|