dom/xslt/xpath/nsXPathExpression.cpp@b8a032363ba2 (annotated)
dom/xslt/xpath/nsXPathExpression.cpp
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #include "nsXPathExpression.h" |
| michael@0 | 7 | #include "txExpr.h" |
| michael@0 | 8 | #include "txExprResult.h" |
| michael@0 | 9 | #include "nsError.h" |
| michael@0 | 10 | #include "nsIDOMCharacterData.h" |
| michael@0 | 11 | #include "nsDOMClassInfoID.h" |
| michael@0 | 12 | #include "nsIDOMDocument.h" |
| michael@0 | 13 | #include "nsXPathResult.h" |
| michael@0 | 14 | #include "txURIUtils.h" |
| michael@0 | 15 | #include "txXPathTreeWalker.h" |
| michael@0 | 16 | |
| michael@0 | 17 | NS_IMPL_CYCLE_COLLECTION(nsXPathExpression, mDocument) |
| michael@0 | 18 | |
| michael@0 | 19 | NS_IMPL_CYCLE_COLLECTING_ADDREF(nsXPathExpression) |
| michael@0 | 20 | NS_IMPL_CYCLE_COLLECTING_RELEASE(nsXPathExpression) |
| michael@0 | 21 | |
| michael@0 | 22 | DOMCI_DATA(XPathExpression, nsXPathExpression) |
| michael@0 | 23 | |
| michael@0 | 24 | NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsXPathExpression) |
| michael@0 | 25 | NS_INTERFACE_MAP_ENTRY(nsIDOMXPathExpression) |
| michael@0 | 26 | NS_INTERFACE_MAP_ENTRY(nsIDOMNSXPathExpression) |
| michael@0 | 27 | NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMXPathExpression) |
| michael@0 | 28 | NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(XPathExpression) |
| michael@0 | 29 | NS_INTERFACE_MAP_END |
| michael@0 | 30 | |
| michael@0 | 31 | nsXPathExpression::nsXPathExpression(nsAutoPtr<Expr>& aExpression, |
| michael@0 | 32 | txResultRecycler* aRecycler, |
| michael@0 | 33 | nsIDOMDocument *aDocument) |
| michael@0 | 34 | : mExpression(aExpression), |
| michael@0 | 35 | mRecycler(aRecycler), |
| michael@0 | 36 | mDocument(aDocument) |
| michael@0 | 37 | { |
| michael@0 | 38 | } |
| michael@0 | 39 | |
| michael@0 | 40 | NS_IMETHODIMP |
| michael@0 | 41 | nsXPathExpression::Evaluate(nsIDOMNode *aContextNode, |
| michael@0 | 42 | uint16_t aType, |
| michael@0 | 43 | nsISupports *aInResult, |
| michael@0 | 44 | nsISupports **aResult) |
| michael@0 | 45 | { |
| michael@0 | 46 | return EvaluateWithContext(aContextNode, 1, 1, aType, aInResult, aResult); |
| michael@0 | 47 | } |
| michael@0 | 48 | |
| michael@0 | 49 | NS_IMETHODIMP |
| michael@0 | 50 | nsXPathExpression::EvaluateWithContext(nsIDOMNode *aContextNode, |
| michael@0 | 51 | uint32_t aContextPosition, |
| michael@0 | 52 | uint32_t aContextSize, |
| michael@0 | 53 | uint16_t aType, |
| michael@0 | 54 | nsISupports *aInResult, |
| michael@0 | 55 | nsISupports **aResult) |
| michael@0 | 56 | { |
| michael@0 | 57 | nsCOMPtr<nsINode> context = do_QueryInterface(aContextNode); |
| michael@0 | 58 | NS_ENSURE_ARG(context); |
| michael@0 | 59 | |
| michael@0 | 60 | if (aContextPosition > aContextSize) |
| michael@0 | 61 | return NS_ERROR_FAILURE; |
| michael@0 | 62 | |
| michael@0 | 63 | if (!nsContentUtils::CanCallerAccess(aContextNode)) |
| michael@0 | 64 | return NS_ERROR_DOM_SECURITY_ERR; |
| michael@0 | 65 | |
| michael@0 | 66 | if (mDocument && mDocument != aContextNode) { |
| michael@0 | 67 | nsCOMPtr<nsIDOMDocument> contextDocument; |
| michael@0 | 68 | aContextNode->GetOwnerDocument(getter_AddRefs(contextDocument)); |
| michael@0 | 69 | |
| michael@0 | 70 | if (mDocument != contextDocument) { |
| michael@0 | 71 | return NS_ERROR_DOM_WRONG_DOCUMENT_ERR; |
| michael@0 | 72 | } |
| michael@0 | 73 | } |
| michael@0 | 74 | |
| michael@0 | 75 | uint16_t nodeType = context->NodeType(); |
| michael@0 | 76 | |
| michael@0 | 77 | if (nodeType == nsIDOMNode::TEXT_NODE || |
| michael@0 | 78 | nodeType == nsIDOMNode::CDATA_SECTION_NODE) { |
| michael@0 | 79 | nsCOMPtr<nsIDOMCharacterData> textNode = do_QueryInterface(aContextNode); |
| michael@0 | 80 | NS_ENSURE_TRUE(textNode, NS_ERROR_FAILURE); |
| michael@0 | 81 | |
| michael@0 | 82 | if (textNode) { |
| michael@0 | 83 | uint32_t textLength; |
| michael@0 | 84 | textNode->GetLength(&textLength); |
| michael@0 | 85 | if (textLength == 0) |
| michael@0 | 86 | return NS_ERROR_DOM_NOT_SUPPORTED_ERR; |
| michael@0 | 87 | } |
| michael@0 | 88 | |
| michael@0 | 89 | // XXX Need to get logical XPath text node for CDATASection |
| michael@0 | 90 | // and Text nodes. |
| michael@0 | 91 | } |
| michael@0 | 92 | else if (nodeType != nsIDOMNode::DOCUMENT_NODE && |
| michael@0 | 93 | nodeType != nsIDOMNode::ELEMENT_NODE && |
| michael@0 | 94 | nodeType != nsIDOMNode::ATTRIBUTE_NODE && |
| michael@0 | 95 | nodeType != nsIDOMNode::COMMENT_NODE && |
| michael@0 | 96 | nodeType != nsIDOMNode::PROCESSING_INSTRUCTION_NODE) { |
| michael@0 | 97 | return NS_ERROR_DOM_NOT_SUPPORTED_ERR; |
| michael@0 | 98 | } |
| michael@0 | 99 | |
| michael@0 | 100 | NS_ENSURE_ARG(aResult); |
| michael@0 | 101 | *aResult = nullptr; |
| michael@0 | 102 | |
| michael@0 | 103 | nsAutoPtr<txXPathNode> contextNode(txXPathNativeNode::createXPathNode(aContextNode)); |
| michael@0 | 104 | if (!contextNode) { |
| michael@0 | 105 | return NS_ERROR_OUT_OF_MEMORY; |
| michael@0 | 106 | } |
| michael@0 | 107 | |
| michael@0 | 108 | EvalContextImpl eContext(*contextNode, aContextPosition, aContextSize, |
| michael@0 | 109 | mRecycler); |
| michael@0 | 110 | nsRefPtr<txAExprResult> exprResult; |
| michael@0 | 111 | nsresult rv = mExpression->evaluate(&eContext, getter_AddRefs(exprResult)); |
| michael@0 | 112 | NS_ENSURE_SUCCESS(rv, rv); |
| michael@0 | 113 | |
| michael@0 | 114 | uint16_t resultType = aType; |
| michael@0 | 115 | if (aType == nsIDOMXPathResult::ANY_TYPE) { |
| michael@0 | 116 | short exprResultType = exprResult->getResultType(); |
| michael@0 | 117 | switch (exprResultType) { |
| michael@0 | 118 | case txAExprResult::NUMBER: |
| michael@0 | 119 | resultType = nsIDOMXPathResult::NUMBER_TYPE; |
| michael@0 | 120 | break; |
| michael@0 | 121 | case txAExprResult::STRING: |
| michael@0 | 122 | resultType = nsIDOMXPathResult::STRING_TYPE; |
| michael@0 | 123 | break; |
| michael@0 | 124 | case txAExprResult::BOOLEAN: |
| michael@0 | 125 | resultType = nsIDOMXPathResult::BOOLEAN_TYPE; |
| michael@0 | 126 | break; |
| michael@0 | 127 | case txAExprResult::NODESET: |
| michael@0 | 128 | resultType = nsIDOMXPathResult::UNORDERED_NODE_ITERATOR_TYPE; |
| michael@0 | 129 | break; |
| michael@0 | 130 | case txAExprResult::RESULT_TREE_FRAGMENT: |
| michael@0 | 131 | NS_ERROR("Can't return a tree fragment!"); |
| michael@0 | 132 | return NS_ERROR_FAILURE; |
| michael@0 | 133 | } |
| michael@0 | 134 | } |
| michael@0 | 135 | |
| michael@0 | 136 | // We need a result object and it must be our implementation. |
| michael@0 | 137 | nsCOMPtr<nsIXPathResult> xpathResult = do_QueryInterface(aInResult); |
| michael@0 | 138 | if (!xpathResult) { |
| michael@0 | 139 | // Either no aInResult or not one of ours. |
| michael@0 | 140 | xpathResult = new nsXPathResult(); |
| michael@0 | 141 | NS_ENSURE_TRUE(xpathResult, NS_ERROR_OUT_OF_MEMORY); |
| michael@0 | 142 | } |
| michael@0 | 143 | rv = xpathResult->SetExprResult(exprResult, resultType, context); |
| michael@0 | 144 | NS_ENSURE_SUCCESS(rv, rv); |
| michael@0 | 145 | |
| michael@0 | 146 | return CallQueryInterface(xpathResult, aResult); |
| michael@0 | 147 | } |
| michael@0 | 148 | |
| michael@0 | 149 | /* |
| michael@0 | 150 | * Implementation of the txIEvalContext private to nsXPathExpression |
| michael@0 | 151 | * EvalContextImpl bases on only one context node and no variables |
| michael@0 | 152 | */ |
| michael@0 | 153 | |
| michael@0 | 154 | nsresult |
| michael@0 | 155 | nsXPathExpression::EvalContextImpl::getVariable(int32_t aNamespace, |
| michael@0 | 156 | nsIAtom* aLName, |
| michael@0 | 157 | txAExprResult*& aResult) |
| michael@0 | 158 | { |
| michael@0 | 159 | aResult = 0; |
| michael@0 | 160 | return NS_ERROR_INVALID_ARG; |
| michael@0 | 161 | } |
| michael@0 | 162 | |
| michael@0 | 163 | bool nsXPathExpression::EvalContextImpl::isStripSpaceAllowed(const txXPathNode& aNode) |
| michael@0 | 164 | { |
| michael@0 | 165 | return false; |
| michael@0 | 166 | } |
| michael@0 | 167 | |
| michael@0 | 168 | void* nsXPathExpression::EvalContextImpl::getPrivateContext() |
| michael@0 | 169 | { |
| michael@0 | 170 | // we don't have a private context here. |
| michael@0 | 171 | return nullptr; |
| michael@0 | 172 | } |
| michael@0 | 173 | |
| michael@0 | 174 | txResultRecycler* nsXPathExpression::EvalContextImpl::recycler() |
| michael@0 | 175 | { |
| michael@0 | 176 | return mRecycler; |
| michael@0 | 177 | } |
| michael@0 | 178 | |
| michael@0 | 179 | void nsXPathExpression::EvalContextImpl::receiveError(const nsAString& aMsg, |
| michael@0 | 180 | nsresult aRes) |
| michael@0 | 181 | { |
| michael@0 | 182 | mLastError = aRes; |
| michael@0 | 183 | // forward aMsg to console service? |
| michael@0 | 184 | } |
| michael@0 | 185 | |
| michael@0 | 186 | const txXPathNode& nsXPathExpression::EvalContextImpl::getContextNode() |
| michael@0 | 187 | { |
| michael@0 | 188 | return mContextNode; |
| michael@0 | 189 | } |
| michael@0 | 190 | |
| michael@0 | 191 | uint32_t nsXPathExpression::EvalContextImpl::size() |
| michael@0 | 192 | { |
| michael@0 | 193 | return mContextSize; |
| michael@0 | 194 | } |
| michael@0 | 195 | |
| michael@0 | 196 | uint32_t nsXPathExpression::EvalContextImpl::position() |
| michael@0 | 197 | { |
| michael@0 | 198 | return mContextPosition; |
| michael@0 | 199 | } |
