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/* -*- 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__ */
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