The Tor Browser / annotate

dom/xslt/xpath/txXPathTreeWalker.h@97036ab72558 (annotated)

dom/xslt/xpath/txXPathTreeWalker.h

Tue, 06 Jan 2015 21:39:09 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Tue, 06 Jan 2015 21:39:09 +0100
branch
TOR_BUG_9701
changeset 8
97036ab72558
permissions
-rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

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 #ifndef txXPathTreeWalker_h__
michael@0 7 #define txXPathTreeWalker_h__
michael@0 8
michael@0 9 #include "txCore.h"
michael@0 10 #include "txXPathNode.h"
michael@0 11 #include "nsIContentInlines.h"
michael@0 12 #include "nsINodeInfo.h"
michael@0 13 #include "nsTArray.h"
michael@0 14
michael@0 15 class nsIAtom;
michael@0 16 class nsIDOMDocument;
michael@0 17
michael@0 18 class txUint32Array : public nsTArray<uint32_t>
michael@0 19 {
michael@0 20 public:
michael@0 21 bool AppendValue(uint32_t aValue)
michael@0 22 {
michael@0 23 return AppendElement(aValue) != nullptr;
michael@0 24 }
michael@0 25 bool RemoveValueAt(uint32_t aIndex)
michael@0 26 {
michael@0 27 if (aIndex < Length()) {
michael@0 28 RemoveElementAt(aIndex);
michael@0 29 }
michael@0 30 return true;
michael@0 31 }
michael@0 32 uint32_t ValueAt(uint32_t aIndex) const
michael@0 33 {
michael@0 34 return (aIndex < Length()) ? ElementAt(aIndex) : 0;
michael@0 35 }
michael@0 36 };
michael@0 37
michael@0 38 class txXPathTreeWalker
michael@0 39 {
michael@0 40 public:
michael@0 41 txXPathTreeWalker(const txXPathTreeWalker& aOther);
michael@0 42 explicit txXPathTreeWalker(const txXPathNode& aNode);
michael@0 43
michael@0 44 bool getAttr(nsIAtom* aLocalName, int32_t aNSID, nsAString& aValue) const;
michael@0 45 int32_t getNamespaceID() const;
michael@0 46 uint16_t getNodeType() const;
michael@0 47 void appendNodeValue(nsAString& aResult) const;
michael@0 48 void getNodeName(nsAString& aName) const;
michael@0 49
michael@0 50 void moveTo(const txXPathTreeWalker& aWalker);
michael@0 51
michael@0 52 void moveToRoot();
michael@0 53 bool moveToParent();
michael@0 54 bool moveToElementById(const nsAString& aID);
michael@0 55 bool moveToFirstAttribute();
michael@0 56 bool moveToNextAttribute();
michael@0 57 bool moveToNamedAttribute(nsIAtom* aLocalName, int32_t aNSID);
michael@0 58 bool moveToFirstChild();
michael@0 59 bool moveToLastChild();
michael@0 60 bool moveToNextSibling();
michael@0 61 bool moveToPreviousSibling();
michael@0 62
michael@0 63 bool isOnNode(const txXPathNode& aNode) const;
michael@0 64
michael@0 65 const txXPathNode& getCurrentPosition() const;
michael@0 66
michael@0 67 private:
michael@0 68 txXPathNode mPosition;
michael@0 69
michael@0 70 bool moveToValidAttribute(uint32_t aStartIndex);
michael@0 71 bool moveToSibling(int32_t aDir);
michael@0 72
michael@0 73 uint32_t mCurrentIndex;
michael@0 74 txUint32Array mDescendants;
michael@0 75 };
michael@0 76
michael@0 77 class txXPathNodeUtils
michael@0 78 {
michael@0 79 public:
michael@0 80 static bool getAttr(const txXPathNode& aNode, nsIAtom* aLocalName,
michael@0 81 int32_t aNSID, nsAString& aValue);
michael@0 82 static already_AddRefed<nsIAtom> getLocalName(const txXPathNode& aNode);
michael@0 83 static nsIAtom* getPrefix(const txXPathNode& aNode);
michael@0 84 static void getLocalName(const txXPathNode& aNode, nsAString& aLocalName);
michael@0 85 static void getNodeName(const txXPathNode& aNode,
michael@0 86 nsAString& aName);
michael@0 87 static int32_t getNamespaceID(const txXPathNode& aNode);
michael@0 88 static void getNamespaceURI(const txXPathNode& aNode, nsAString& aURI);
michael@0 89 static uint16_t getNodeType(const txXPathNode& aNode);
michael@0 90 static void appendNodeValue(const txXPathNode& aNode, nsAString& aResult);
michael@0 91 static bool isWhitespace(const txXPathNode& aNode);
michael@0 92 static txXPathNode* getOwnerDocument(const txXPathNode& aNode);
michael@0 93 static int32_t getUniqueIdentifier(const txXPathNode& aNode);
michael@0 94 static nsresult getXSLTId(const txXPathNode& aNode,
michael@0 95 const txXPathNode& aBase, nsAString& aResult);
michael@0 96 static void release(txXPathNode* aNode);
michael@0 97 static void getBaseURI(const txXPathNode& aNode, nsAString& aURI);
michael@0 98 static int comparePosition(const txXPathNode& aNode,
michael@0 99 const txXPathNode& aOtherNode);
michael@0 100 static bool localNameEquals(const txXPathNode& aNode,
michael@0 101 nsIAtom* aLocalName);
michael@0 102 static bool isRoot(const txXPathNode& aNode);
michael@0 103 static bool isElement(const txXPathNode& aNode);
michael@0 104 static bool isAttribute(const txXPathNode& aNode);
michael@0 105 static bool isProcessingInstruction(const txXPathNode& aNode);
michael@0 106 static bool isComment(const txXPathNode& aNode);
michael@0 107 static bool isText(const txXPathNode& aNode);
michael@0 108 static inline bool isHTMLElementInHTMLDocument(const txXPathNode& aNode)
michael@0 109 {
michael@0 110 if (!aNode.isContent()) {
michael@0 111 return false;
michael@0 112 }
michael@0 113 nsIContent* content = aNode.Content();
michael@0 114 return content->IsHTML() && content->IsInHTMLDocument();
michael@0 115 }
michael@0 116 };
michael@0 117
michael@0 118 class txXPathNativeNode
michael@0 119 {
michael@0 120 public:
michael@0 121 static txXPathNode* createXPathNode(nsIDOMNode* aNode,
michael@0 122 bool aKeepRootAlive = false);
michael@0 123 static txXPathNode* createXPathNode(nsIContent* aContent,
michael@0 124 bool aKeepRootAlive = false);
michael@0 125 static txXPathNode* createXPathNode(nsIDOMDocument* aDocument);
michael@0 126 static nsresult getNode(const txXPathNode& aNode, nsIDOMNode** aResult);
michael@0 127 static nsIContent* getContent(const txXPathNode& aNode);
michael@0 128 static nsIDocument* getDocument(const txXPathNode& aNode);
michael@0 129 static void addRef(const txXPathNode& aNode)
michael@0 130 {
michael@0 131 NS_ADDREF(aNode.mNode);
michael@0 132 }
michael@0 133 static void release(const txXPathNode& aNode)
michael@0 134 {
michael@0 135 nsINode *node = aNode.mNode;
michael@0 136 NS_RELEASE(node);
michael@0 137 }
michael@0 138 };
michael@0 139
michael@0 140 inline const txXPathNode&
michael@0 141 txXPathTreeWalker::getCurrentPosition() const
michael@0 142 {
michael@0 143 return mPosition;
michael@0 144 }
michael@0 145
michael@0 146 inline bool
michael@0 147 txXPathTreeWalker::getAttr(nsIAtom* aLocalName, int32_t aNSID,
michael@0 148 nsAString& aValue) const
michael@0 149 {
michael@0 150 return txXPathNodeUtils::getAttr(mPosition, aLocalName, aNSID, aValue);
michael@0 151 }
michael@0 152
michael@0 153 inline int32_t
michael@0 154 txXPathTreeWalker::getNamespaceID() const
michael@0 155 {
michael@0 156 return txXPathNodeUtils::getNamespaceID(mPosition);
michael@0 157 }
michael@0 158
michael@0 159 inline void
michael@0 160 txXPathTreeWalker::appendNodeValue(nsAString& aResult) const
michael@0 161 {
michael@0 162 txXPathNodeUtils::appendNodeValue(mPosition, aResult);
michael@0 163 }
michael@0 164
michael@0 165 inline void
michael@0 166 txXPathTreeWalker::getNodeName(nsAString& aName) const
michael@0 167 {
michael@0 168 txXPathNodeUtils::getNodeName(mPosition, aName);
michael@0 169 }
michael@0 170
michael@0 171 inline void
michael@0 172 txXPathTreeWalker::moveTo(const txXPathTreeWalker& aWalker)
michael@0 173 {
michael@0 174 nsINode *root = nullptr;
michael@0 175 if (mPosition.mRefCountRoot) {
michael@0 176 root = mPosition.Root();
michael@0 177 }
michael@0 178 mPosition.mIndex = aWalker.mPosition.mIndex;
michael@0 179 mPosition.mRefCountRoot = aWalker.mPosition.mRefCountRoot;
michael@0 180 mPosition.mNode = aWalker.mPosition.mNode;
michael@0 181 nsINode *newRoot = nullptr;
michael@0 182 if (mPosition.mRefCountRoot) {
michael@0 183 newRoot = mPosition.Root();
michael@0 184 }
michael@0 185 if (root != newRoot) {
michael@0 186 NS_IF_ADDREF(newRoot);
michael@0 187 NS_IF_RELEASE(root);
michael@0 188 }
michael@0 189
michael@0 190 mCurrentIndex = aWalker.mCurrentIndex;
michael@0 191 mDescendants.Clear();
michael@0 192 }
michael@0 193
michael@0 194 inline bool
michael@0 195 txXPathTreeWalker::isOnNode(const txXPathNode& aNode) const
michael@0 196 {
michael@0 197 return (mPosition == aNode);
michael@0 198 }
michael@0 199
michael@0 200 /* static */
michael@0 201 inline int32_t
michael@0 202 txXPathNodeUtils::getUniqueIdentifier(const txXPathNode& aNode)
michael@0 203 {
michael@0 204 NS_PRECONDITION(!aNode.isAttribute(),
michael@0 205 "Not implemented for attributes.");
michael@0 206 return NS_PTR_TO_INT32(aNode.mNode);
michael@0 207 }
michael@0 208
michael@0 209 /* static */
michael@0 210 inline void
michael@0 211 txXPathNodeUtils::release(txXPathNode* aNode)
michael@0 212 {
michael@0 213 NS_RELEASE(aNode->mNode);
michael@0 214 }
michael@0 215
michael@0 216 /* static */
michael@0 217 inline bool
michael@0 218 txXPathNodeUtils::localNameEquals(const txXPathNode& aNode,
michael@0 219 nsIAtom* aLocalName)
michael@0 220 {
michael@0 221 if (aNode.isContent() &&
michael@0 222 aNode.Content()->IsElement()) {
michael@0 223 return aNode.Content()->NodeInfo()->Equals(aLocalName);
michael@0 224 }
michael@0 225
michael@0 226 nsCOMPtr<nsIAtom> localName = txXPathNodeUtils::getLocalName(aNode);
michael@0 227
michael@0 228 return localName == aLocalName;
michael@0 229 }
michael@0 230
michael@0 231 /* static */
michael@0 232 inline bool
michael@0 233 txXPathNodeUtils::isRoot(const txXPathNode& aNode)
michael@0 234 {
michael@0 235 return !aNode.isAttribute() && !aNode.mNode->GetParentNode();
michael@0 236 }
michael@0 237
michael@0 238 /* static */
michael@0 239 inline bool
michael@0 240 txXPathNodeUtils::isElement(const txXPathNode& aNode)
michael@0 241 {
michael@0 242 return aNode.isContent() &&
michael@0 243 aNode.Content()->IsElement();
michael@0 244 }
michael@0 245
michael@0 246
michael@0 247 /* static */
michael@0 248 inline bool
michael@0 249 txXPathNodeUtils::isAttribute(const txXPathNode& aNode)
michael@0 250 {
michael@0 251 return aNode.isAttribute();
michael@0 252 }
michael@0 253
michael@0 254 /* static */
michael@0 255 inline bool
michael@0 256 txXPathNodeUtils::isProcessingInstruction(const txXPathNode& aNode)
michael@0 257 {
michael@0 258 return aNode.isContent() &&
michael@0 259 aNode.Content()->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION);
michael@0 260 }
michael@0 261
michael@0 262 /* static */
michael@0 263 inline bool
michael@0 264 txXPathNodeUtils::isComment(const txXPathNode& aNode)
michael@0 265 {
michael@0 266 return aNode.isContent() &&
michael@0 267 aNode.Content()->IsNodeOfType(nsINode::eCOMMENT);
michael@0 268 }
michael@0 269
michael@0 270 /* static */
michael@0 271 inline bool
michael@0 272 txXPathNodeUtils::isText(const txXPathNode& aNode)
michael@0 273 {
michael@0 274 return aNode.isContent() &&
michael@0 275 aNode.Content()->IsNodeOfType(nsINode::eTEXT);
michael@0 276 }
michael@0 277
michael@0 278 #endif /* txXPathTreeWalker_h__ */

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