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Diffstat (limited to 'dom/xslt/xpath/txXPathTreeWalker.h')
| -rw-r--r-- | dom/xslt/xpath/txXPathTreeWalker.h | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/dom/xslt/xpath/txXPathTreeWalker.h b/dom/xslt/xpath/txXPathTreeWalker.h new file mode 100644 index 000000000..99a07ffe7 --- /dev/null +++ b/dom/xslt/xpath/txXPathTreeWalker.h @@ -0,0 +1,287 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef txXPathTreeWalker_h__ +#define txXPathTreeWalker_h__ + +#include "txCore.h" +#include "txXPathNode.h" +#include "nsIContentInlines.h" +#include "nsTArray.h" + +class nsIAtom; +class nsIDOMDocument; + +class txUint32Array : public nsTArray<uint32_t> +{ +public: + bool AppendValue(uint32_t aValue) + { + return AppendElement(aValue) != nullptr; + } + bool RemoveValueAt(uint32_t aIndex) + { + if (aIndex < Length()) { + RemoveElementAt(aIndex); + } + return true; + } + uint32_t ValueAt(uint32_t aIndex) const + { + return (aIndex < Length()) ? ElementAt(aIndex) : 0; + } +}; + +class txXPathTreeWalker +{ +public: + txXPathTreeWalker(const txXPathTreeWalker& aOther); + explicit txXPathTreeWalker(const txXPathNode& aNode); + + bool getAttr(nsIAtom* aLocalName, int32_t aNSID, nsAString& aValue) const; + int32_t getNamespaceID() const; + uint16_t getNodeType() const; + void appendNodeValue(nsAString& aResult) const; + void getNodeName(nsAString& aName) const; + + void moveTo(const txXPathTreeWalker& aWalker); + + void moveToRoot(); + bool moveToParent(); + bool moveToElementById(const nsAString& aID); + bool moveToFirstAttribute(); + bool moveToNextAttribute(); + bool moveToNamedAttribute(nsIAtom* aLocalName, int32_t aNSID); + bool moveToFirstChild(); + bool moveToLastChild(); + bool moveToNextSibling(); + bool moveToPreviousSibling(); + + bool isOnNode(const txXPathNode& aNode) const; + + const txXPathNode& getCurrentPosition() const; + +private: + txXPathNode mPosition; + + bool moveToValidAttribute(uint32_t aStartIndex); + bool moveToSibling(int32_t aDir); + + uint32_t mCurrentIndex; + txUint32Array mDescendants; +}; + +class txXPathNodeUtils +{ +public: + static bool getAttr(const txXPathNode& aNode, nsIAtom* aLocalName, + int32_t aNSID, nsAString& aValue); + static already_AddRefed<nsIAtom> getLocalName(const txXPathNode& aNode); + static nsIAtom* getPrefix(const txXPathNode& aNode); + static void getLocalName(const txXPathNode& aNode, nsAString& aLocalName); + static void getNodeName(const txXPathNode& aNode, + nsAString& aName); + static int32_t getNamespaceID(const txXPathNode& aNode); + static void getNamespaceURI(const txXPathNode& aNode, nsAString& aURI); + static uint16_t getNodeType(const txXPathNode& aNode); + static void appendNodeValue(const txXPathNode& aNode, nsAString& aResult); + static bool isWhitespace(const txXPathNode& aNode); + static txXPathNode* getOwnerDocument(const txXPathNode& aNode); + static int32_t getUniqueIdentifier(const txXPathNode& aNode); + static nsresult getXSLTId(const txXPathNode& aNode, + const txXPathNode& aBase, nsAString& aResult); + static void release(txXPathNode* aNode); + static nsresult getBaseURI(const txXPathNode& aNode, nsAString& aURI); + static int comparePosition(const txXPathNode& aNode, + const txXPathNode& aOtherNode); + static bool localNameEquals(const txXPathNode& aNode, + nsIAtom* aLocalName); + static bool isRoot(const txXPathNode& aNode); + static bool isElement(const txXPathNode& aNode); + static bool isAttribute(const txXPathNode& aNode); + static bool isProcessingInstruction(const txXPathNode& aNode); + static bool isComment(const txXPathNode& aNode); + static bool isText(const txXPathNode& aNode); + static inline bool isHTMLElementInHTMLDocument(const txXPathNode& aNode) + { + if (!aNode.isContent()) { + return false; + } + nsIContent* content = aNode.Content(); + return content->IsHTMLElement() && content->IsInHTMLDocument(); + } +}; + +class txXPathNativeNode +{ +public: + static txXPathNode* createXPathNode(nsINode* aNode, + bool aKeepRootAlive = false); + static txXPathNode* createXPathNode(nsIDOMNode* aNode, + bool aKeepRootAlive = false) + { + nsCOMPtr<nsINode> node = do_QueryInterface(aNode); + return createXPathNode(node, aKeepRootAlive); + } + static txXPathNode* createXPathNode(nsIContent* aContent, + bool aKeepRootAlive = false); + static txXPathNode* createXPathNode(nsIDOMDocument* aDocument); + static nsINode* getNode(const txXPathNode& aNode); + static nsresult getNode(const txXPathNode& aNode, nsIDOMNode** aResult) + { + return CallQueryInterface(getNode(aNode), aResult); + } + static nsIContent* getContent(const txXPathNode& aNode); + static nsIDocument* getDocument(const txXPathNode& aNode); + static void addRef(const txXPathNode& aNode) + { + NS_ADDREF(aNode.mNode); + } + static void release(const txXPathNode& aNode) + { + nsINode *node = aNode.mNode; + NS_RELEASE(node); + } +}; + +inline const txXPathNode& +txXPathTreeWalker::getCurrentPosition() const +{ + return mPosition; +} + +inline bool +txXPathTreeWalker::getAttr(nsIAtom* aLocalName, int32_t aNSID, + nsAString& aValue) const +{ + return txXPathNodeUtils::getAttr(mPosition, aLocalName, aNSID, aValue); +} + +inline int32_t +txXPathTreeWalker::getNamespaceID() const +{ + return txXPathNodeUtils::getNamespaceID(mPosition); +} + +inline void +txXPathTreeWalker::appendNodeValue(nsAString& aResult) const +{ + txXPathNodeUtils::appendNodeValue(mPosition, aResult); +} + +inline void +txXPathTreeWalker::getNodeName(nsAString& aName) const +{ + txXPathNodeUtils::getNodeName(mPosition, aName); +} + +inline void +txXPathTreeWalker::moveTo(const txXPathTreeWalker& aWalker) +{ + nsINode *root = nullptr; + if (mPosition.mRefCountRoot) { + root = mPosition.Root(); + } + mPosition.mIndex = aWalker.mPosition.mIndex; + mPosition.mRefCountRoot = aWalker.mPosition.mRefCountRoot; + mPosition.mNode = aWalker.mPosition.mNode; + nsINode *newRoot = nullptr; + if (mPosition.mRefCountRoot) { + newRoot = mPosition.Root(); + } + if (root != newRoot) { + NS_IF_ADDREF(newRoot); + NS_IF_RELEASE(root); + } + + mCurrentIndex = aWalker.mCurrentIndex; + mDescendants.Clear(); +} + +inline bool +txXPathTreeWalker::isOnNode(const txXPathNode& aNode) const +{ + return (mPosition == aNode); +} + +/* static */ +inline int32_t +txXPathNodeUtils::getUniqueIdentifier(const txXPathNode& aNode) +{ + NS_PRECONDITION(!aNode.isAttribute(), + "Not implemented for attributes."); + return NS_PTR_TO_INT32(aNode.mNode); +} + +/* static */ +inline void +txXPathNodeUtils::release(txXPathNode* aNode) +{ + NS_RELEASE(aNode->mNode); +} + +/* static */ +inline bool +txXPathNodeUtils::localNameEquals(const txXPathNode& aNode, + nsIAtom* aLocalName) +{ + if (aNode.isContent() && + aNode.Content()->IsElement()) { + return aNode.Content()->NodeInfo()->Equals(aLocalName); + } + + nsCOMPtr<nsIAtom> localName = txXPathNodeUtils::getLocalName(aNode); + + return localName == aLocalName; +} + +/* static */ +inline bool +txXPathNodeUtils::isRoot(const txXPathNode& aNode) +{ + return !aNode.isAttribute() && !aNode.mNode->GetParentNode(); +} + +/* static */ +inline bool +txXPathNodeUtils::isElement(const txXPathNode& aNode) +{ + return aNode.isContent() && + aNode.Content()->IsElement(); +} + + +/* static */ +inline bool +txXPathNodeUtils::isAttribute(const txXPathNode& aNode) +{ + return aNode.isAttribute(); +} + +/* static */ +inline bool +txXPathNodeUtils::isProcessingInstruction(const txXPathNode& aNode) +{ + return aNode.isContent() && + aNode.Content()->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION); +} + +/* static */ +inline bool +txXPathNodeUtils::isComment(const txXPathNode& aNode) +{ + return aNode.isContent() && + aNode.Content()->IsNodeOfType(nsINode::eCOMMENT); +} + +/* static */ +inline bool +txXPathNodeUtils::isText(const txXPathNode& aNode) +{ + return aNode.isContent() && + aNode.Content()->IsNodeOfType(nsINode::eTEXT); +} + +#endif /* txXPathTreeWalker_h__ */ |