The Tor Browser / file comparison
comparison: dom/xslt/xpath/nsXPathExpression.cpp
dom/xslt/xpath/nsXPathExpression.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:2a233a55d8ea |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "nsXPathExpression.h" | |
| 7 #include "txExpr.h" | |
| 8 #include "txExprResult.h" | |
| 9 #include "nsError.h" | |
| 10 #include "nsIDOMCharacterData.h" | |
| 11 #include "nsDOMClassInfoID.h" | |
| 12 #include "nsIDOMDocument.h" | |
| 13 #include "nsXPathResult.h" | |
| 14 #include "txURIUtils.h" | |
| 15 #include "txXPathTreeWalker.h" | |
| 16 | |
| 17 NS_IMPL_CYCLE_COLLECTION(nsXPathExpression, mDocument) | |
| 18 | |
| 19 NS_IMPL_CYCLE_COLLECTING_ADDREF(nsXPathExpression) | |
| 20 NS_IMPL_CYCLE_COLLECTING_RELEASE(nsXPathExpression) | |
| 21 | |
| 22 DOMCI_DATA(XPathExpression, nsXPathExpression) | |
| 23 | |
| 24 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsXPathExpression) | |
| 25 NS_INTERFACE_MAP_ENTRY(nsIDOMXPathExpression) | |
| 26 NS_INTERFACE_MAP_ENTRY(nsIDOMNSXPathExpression) | |
| 27 NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMXPathExpression) | |
| 28 NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(XPathExpression) | |
| 29 NS_INTERFACE_MAP_END | |
| 30 | |
| 31 nsXPathExpression::nsXPathExpression(nsAutoPtr<Expr>& aExpression, | |
| 32 txResultRecycler* aRecycler, | |
| 33 nsIDOMDocument *aDocument) | |
| 34 : mExpression(aExpression), | |
| 35 mRecycler(aRecycler), | |
| 36 mDocument(aDocument) | |
| 37 { | |
| 38 } | |
| 39 | |
| 40 NS_IMETHODIMP | |
| 41 nsXPathExpression::Evaluate(nsIDOMNode *aContextNode, | |
| 42 uint16_t aType, | |
| 43 nsISupports *aInResult, | |
| 44 nsISupports **aResult) | |
| 45 { | |
| 46 return EvaluateWithContext(aContextNode, 1, 1, aType, aInResult, aResult); | |
| 47 } | |
| 48 | |
| 49 NS_IMETHODIMP | |
| 50 nsXPathExpression::EvaluateWithContext(nsIDOMNode *aContextNode, | |
| 51 uint32_t aContextPosition, | |
| 52 uint32_t aContextSize, | |
| 53 uint16_t aType, | |
| 54 nsISupports *aInResult, | |
| 55 nsISupports **aResult) | |
| 56 { | |
| 57 nsCOMPtr<nsINode> context = do_QueryInterface(aContextNode); | |
| 58 NS_ENSURE_ARG(context); | |
| 59 | |
| 60 if (aContextPosition > aContextSize) | |
| 61 return NS_ERROR_FAILURE; | |
| 62 | |
| 63 if (!nsContentUtils::CanCallerAccess(aContextNode)) | |
| 64 return NS_ERROR_DOM_SECURITY_ERR; | |
| 65 | |
| 66 if (mDocument && mDocument != aContextNode) { | |
| 67 nsCOMPtr<nsIDOMDocument> contextDocument; | |
| 68 aContextNode->GetOwnerDocument(getter_AddRefs(contextDocument)); | |
| 69 | |
| 70 if (mDocument != contextDocument) { | |
| 71 return NS_ERROR_DOM_WRONG_DOCUMENT_ERR; | |
| 72 } | |
| 73 } | |
| 74 | |
| 75 uint16_t nodeType = context->NodeType(); | |
| 76 | |
| 77 if (nodeType == nsIDOMNode::TEXT_NODE || | |
| 78 nodeType == nsIDOMNode::CDATA_SECTION_NODE) { | |
| 79 nsCOMPtr<nsIDOMCharacterData> textNode = do_QueryInterface(aContextNode); | |
| 80 NS_ENSURE_TRUE(textNode, NS_ERROR_FAILURE); | |
| 81 | |
| 82 if (textNode) { | |
| 83 uint32_t textLength; | |
| 84 textNode->GetLength(&textLength); | |
| 85 if (textLength == 0) | |
| 86 return NS_ERROR_DOM_NOT_SUPPORTED_ERR; | |
| 87 } | |
| 88 | |
| 89 // XXX Need to get logical XPath text node for CDATASection | |
| 90 // and Text nodes. | |
| 91 } | |
| 92 else if (nodeType != nsIDOMNode::DOCUMENT_NODE && | |
| 93 nodeType != nsIDOMNode::ELEMENT_NODE && | |
| 94 nodeType != nsIDOMNode::ATTRIBUTE_NODE && | |
| 95 nodeType != nsIDOMNode::COMMENT_NODE && | |
| 96 nodeType != nsIDOMNode::PROCESSING_INSTRUCTION_NODE) { | |
| 97 return NS_ERROR_DOM_NOT_SUPPORTED_ERR; | |
| 98 } | |
| 99 | |
| 100 NS_ENSURE_ARG(aResult); | |
| 101 *aResult = nullptr; | |
| 102 | |
| 103 nsAutoPtr<txXPathNode> contextNode(txXPathNativeNode::createXPathNode(aContextNode)); | |
| 104 if (!contextNode) { | |
| 105 return NS_ERROR_OUT_OF_MEMORY; | |
| 106 } | |
| 107 | |
| 108 EvalContextImpl eContext(*contextNode, aContextPosition, aContextSize, | |
| 109 mRecycler); | |
| 110 nsRefPtr<txAExprResult> exprResult; | |
| 111 nsresult rv = mExpression->evaluate(&eContext, getter_AddRefs(exprResult)); | |
| 112 NS_ENSURE_SUCCESS(rv, rv); | |
| 113 | |
| 114 uint16_t resultType = aType; | |
| 115 if (aType == nsIDOMXPathResult::ANY_TYPE) { | |
| 116 short exprResultType = exprResult->getResultType(); | |
| 117 switch (exprResultType) { | |
| 118 case txAExprResult::NUMBER: | |
| 119 resultType = nsIDOMXPathResult::NUMBER_TYPE; | |
| 120 break; | |
| 121 case txAExprResult::STRING: | |
| 122 resultType = nsIDOMXPathResult::STRING_TYPE; | |
| 123 break; | |
| 124 case txAExprResult::BOOLEAN: | |
| 125 resultType = nsIDOMXPathResult::BOOLEAN_TYPE; | |
| 126 break; | |
| 127 case txAExprResult::NODESET: | |
| 128 resultType = nsIDOMXPathResult::UNORDERED_NODE_ITERATOR_TYPE; | |
| 129 break; | |
| 130 case txAExprResult::RESULT_TREE_FRAGMENT: | |
| 131 NS_ERROR("Can't return a tree fragment!"); | |
| 132 return NS_ERROR_FAILURE; | |
| 133 } | |
| 134 } | |
| 135 | |
| 136 // We need a result object and it must be our implementation. | |
| 137 nsCOMPtr<nsIXPathResult> xpathResult = do_QueryInterface(aInResult); | |
| 138 if (!xpathResult) { | |
| 139 // Either no aInResult or not one of ours. | |
| 140 xpathResult = new nsXPathResult(); | |
| 141 NS_ENSURE_TRUE(xpathResult, NS_ERROR_OUT_OF_MEMORY); | |
| 142 } | |
| 143 rv = xpathResult->SetExprResult(exprResult, resultType, context); | |
| 144 NS_ENSURE_SUCCESS(rv, rv); | |
| 145 | |
| 146 return CallQueryInterface(xpathResult, aResult); | |
| 147 } | |
| 148 | |
| 149 /* | |
| 150 * Implementation of the txIEvalContext private to nsXPathExpression | |
| 151 * EvalContextImpl bases on only one context node and no variables | |
| 152 */ | |
| 153 | |
| 154 nsresult | |
| 155 nsXPathExpression::EvalContextImpl::getVariable(int32_t aNamespace, | |
| 156 nsIAtom* aLName, | |
| 157 txAExprResult*& aResult) | |
| 158 { | |
| 159 aResult = 0; | |
| 160 return NS_ERROR_INVALID_ARG; | |
| 161 } | |
| 162 | |
| 163 bool nsXPathExpression::EvalContextImpl::isStripSpaceAllowed(const txXPathNode& aNode) | |
| 164 { | |
| 165 return false; | |
| 166 } | |
| 167 | |
| 168 void* nsXPathExpression::EvalContextImpl::getPrivateContext() | |
| 169 { | |
| 170 // we don't have a private context here. | |
| 171 return nullptr; | |
| 172 } | |
| 173 | |
| 174 txResultRecycler* nsXPathExpression::EvalContextImpl::recycler() | |
| 175 { | |
| 176 return mRecycler; | |
| 177 } | |
| 178 | |
| 179 void nsXPathExpression::EvalContextImpl::receiveError(const nsAString& aMsg, | |
| 180 nsresult aRes) | |
| 181 { | |
| 182 mLastError = aRes; | |
| 183 // forward aMsg to console service? | |
| 184 } | |
| 185 | |
| 186 const txXPathNode& nsXPathExpression::EvalContextImpl::getContextNode() | |
| 187 { | |
| 188 return mContextNode; | |
| 189 } | |
| 190 | |
| 191 uint32_t nsXPathExpression::EvalContextImpl::size() | |
| 192 { | |
| 193 return mContextSize; | |
| 194 } | |
| 195 | |
| 196 uint32_t nsXPathExpression::EvalContextImpl::position() | |
| 197 { | |
| 198 return mContextPosition; | |
| 199 } |
