1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/xslt/xpath/nsXPathExpression.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,199 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "nsXPathExpression.h"
1.10 +#include "txExpr.h"
1.11 +#include "txExprResult.h"
1.12 +#include "nsError.h"
1.13 +#include "nsIDOMCharacterData.h"
1.14 +#include "nsDOMClassInfoID.h"
1.15 +#include "nsIDOMDocument.h"
1.16 +#include "nsXPathResult.h"
1.17 +#include "txURIUtils.h"
1.18 +#include "txXPathTreeWalker.h"
1.19 +
1.20 +NS_IMPL_CYCLE_COLLECTION(nsXPathExpression, mDocument)
1.21 +
1.22 +NS_IMPL_CYCLE_COLLECTING_ADDREF(nsXPathExpression)
1.23 +NS_IMPL_CYCLE_COLLECTING_RELEASE(nsXPathExpression)
1.24 +
1.25 +DOMCI_DATA(XPathExpression, nsXPathExpression)
1.26 +
1.27 +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsXPathExpression)
1.28 + NS_INTERFACE_MAP_ENTRY(nsIDOMXPathExpression)
1.29 + NS_INTERFACE_MAP_ENTRY(nsIDOMNSXPathExpression)
1.30 + NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMXPathExpression)
1.31 + NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(XPathExpression)
1.32 +NS_INTERFACE_MAP_END
1.33 +
1.34 +nsXPathExpression::nsXPathExpression(nsAutoPtr<Expr>& aExpression,
1.35 + txResultRecycler* aRecycler,
1.36 + nsIDOMDocument *aDocument)
1.37 + : mExpression(aExpression),
1.38 + mRecycler(aRecycler),
1.39 + mDocument(aDocument)
1.40 +{
1.41 +}
1.42 +
1.43 +NS_IMETHODIMP
1.44 +nsXPathExpression::Evaluate(nsIDOMNode *aContextNode,
1.45 + uint16_t aType,
1.46 + nsISupports *aInResult,
1.47 + nsISupports **aResult)
1.48 +{
1.49 + return EvaluateWithContext(aContextNode, 1, 1, aType, aInResult, aResult);
1.50 +}
1.51 +
1.52 +NS_IMETHODIMP
1.53 +nsXPathExpression::EvaluateWithContext(nsIDOMNode *aContextNode,
1.54 + uint32_t aContextPosition,
1.55 + uint32_t aContextSize,
1.56 + uint16_t aType,
1.57 + nsISupports *aInResult,
1.58 + nsISupports **aResult)
1.59 +{
1.60 + nsCOMPtr<nsINode> context = do_QueryInterface(aContextNode);
1.61 + NS_ENSURE_ARG(context);
1.62 +
1.63 + if (aContextPosition > aContextSize)
1.64 + return NS_ERROR_FAILURE;
1.65 +
1.66 + if (!nsContentUtils::CanCallerAccess(aContextNode))
1.67 + return NS_ERROR_DOM_SECURITY_ERR;
1.68 +
1.69 + if (mDocument && mDocument != aContextNode) {
1.70 + nsCOMPtr<nsIDOMDocument> contextDocument;
1.71 + aContextNode->GetOwnerDocument(getter_AddRefs(contextDocument));
1.72 +
1.73 + if (mDocument != contextDocument) {
1.74 + return NS_ERROR_DOM_WRONG_DOCUMENT_ERR;
1.75 + }
1.76 + }
1.77 +
1.78 + uint16_t nodeType = context->NodeType();
1.79 +
1.80 + if (nodeType == nsIDOMNode::TEXT_NODE ||
1.81 + nodeType == nsIDOMNode::CDATA_SECTION_NODE) {
1.82 + nsCOMPtr<nsIDOMCharacterData> textNode = do_QueryInterface(aContextNode);
1.83 + NS_ENSURE_TRUE(textNode, NS_ERROR_FAILURE);
1.84 +
1.85 + if (textNode) {
1.86 + uint32_t textLength;
1.87 + textNode->GetLength(&textLength);
1.88 + if (textLength == 0)
1.89 + return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
1.90 + }
1.91 +
1.92 + // XXX Need to get logical XPath text node for CDATASection
1.93 + // and Text nodes.
1.94 + }
1.95 + else if (nodeType != nsIDOMNode::DOCUMENT_NODE &&
1.96 + nodeType != nsIDOMNode::ELEMENT_NODE &&
1.97 + nodeType != nsIDOMNode::ATTRIBUTE_NODE &&
1.98 + nodeType != nsIDOMNode::COMMENT_NODE &&
1.99 + nodeType != nsIDOMNode::PROCESSING_INSTRUCTION_NODE) {
1.100 + return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
1.101 + }
1.102 +
1.103 + NS_ENSURE_ARG(aResult);
1.104 + *aResult = nullptr;
1.105 +
1.106 + nsAutoPtr<txXPathNode> contextNode(txXPathNativeNode::createXPathNode(aContextNode));
1.107 + if (!contextNode) {
1.108 + return NS_ERROR_OUT_OF_MEMORY;
1.109 + }
1.110 +
1.111 + EvalContextImpl eContext(*contextNode, aContextPosition, aContextSize,
1.112 + mRecycler);
1.113 + nsRefPtr<txAExprResult> exprResult;
1.114 + nsresult rv = mExpression->evaluate(&eContext, getter_AddRefs(exprResult));
1.115 + NS_ENSURE_SUCCESS(rv, rv);
1.116 +
1.117 + uint16_t resultType = aType;
1.118 + if (aType == nsIDOMXPathResult::ANY_TYPE) {
1.119 + short exprResultType = exprResult->getResultType();
1.120 + switch (exprResultType) {
1.121 + case txAExprResult::NUMBER:
1.122 + resultType = nsIDOMXPathResult::NUMBER_TYPE;
1.123 + break;
1.124 + case txAExprResult::STRING:
1.125 + resultType = nsIDOMXPathResult::STRING_TYPE;
1.126 + break;
1.127 + case txAExprResult::BOOLEAN:
1.128 + resultType = nsIDOMXPathResult::BOOLEAN_TYPE;
1.129 + break;
1.130 + case txAExprResult::NODESET:
1.131 + resultType = nsIDOMXPathResult::UNORDERED_NODE_ITERATOR_TYPE;
1.132 + break;
1.133 + case txAExprResult::RESULT_TREE_FRAGMENT:
1.134 + NS_ERROR("Can't return a tree fragment!");
1.135 + return NS_ERROR_FAILURE;
1.136 + }
1.137 + }
1.138 +
1.139 + // We need a result object and it must be our implementation.
1.140 + nsCOMPtr<nsIXPathResult> xpathResult = do_QueryInterface(aInResult);
1.141 + if (!xpathResult) {
1.142 + // Either no aInResult or not one of ours.
1.143 + xpathResult = new nsXPathResult();
1.144 + NS_ENSURE_TRUE(xpathResult, NS_ERROR_OUT_OF_MEMORY);
1.145 + }
1.146 + rv = xpathResult->SetExprResult(exprResult, resultType, context);
1.147 + NS_ENSURE_SUCCESS(rv, rv);
1.148 +
1.149 + return CallQueryInterface(xpathResult, aResult);
1.150 +}
1.151 +
1.152 +/*
1.153 + * Implementation of the txIEvalContext private to nsXPathExpression
1.154 + * EvalContextImpl bases on only one context node and no variables
1.155 + */
1.156 +
1.157 +nsresult
1.158 +nsXPathExpression::EvalContextImpl::getVariable(int32_t aNamespace,
1.159 + nsIAtom* aLName,
1.160 + txAExprResult*& aResult)
1.161 +{
1.162 + aResult = 0;
1.163 + return NS_ERROR_INVALID_ARG;
1.164 +}
1.165 +
1.166 +bool nsXPathExpression::EvalContextImpl::isStripSpaceAllowed(const txXPathNode& aNode)
1.167 +{
1.168 + return false;
1.169 +}
1.170 +
1.171 +void* nsXPathExpression::EvalContextImpl::getPrivateContext()
1.172 +{
1.173 + // we don't have a private context here.
1.174 + return nullptr;
1.175 +}
1.176 +
1.177 +txResultRecycler* nsXPathExpression::EvalContextImpl::recycler()
1.178 +{
1.179 + return mRecycler;
1.180 +}
1.181 +
1.182 +void nsXPathExpression::EvalContextImpl::receiveError(const nsAString& aMsg,
1.183 + nsresult aRes)
1.184 +{
1.185 + mLastError = aRes;
1.186 + // forward aMsg to console service?
1.187 +}
1.188 +
1.189 +const txXPathNode& nsXPathExpression::EvalContextImpl::getContextNode()
1.190 +{
1.191 + return mContextNode;
1.192 +}
1.193 +
1.194 +uint32_t nsXPathExpression::EvalContextImpl::size()
1.195 +{
1.196 + return mContextSize;
1.197 +}
1.198 +
1.199 +uint32_t nsXPathExpression::EvalContextImpl::position()
1.200 +{
1.201 + return mContextPosition;
1.202 +}
