зеркало из https://github.com/mozilla/gecko-dev.git
143 строки
3.8 KiB
C++
143 строки
3.8 KiB
C++
/* -*- 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 __TX_I_XPATH_CONTEXT
|
|
#define __TX_I_XPATH_CONTEXT
|
|
|
|
#include "txCore.h"
|
|
|
|
class FunctionCall;
|
|
class nsAtom;
|
|
class txAExprResult;
|
|
class txResultRecycler;
|
|
class txXPathNode;
|
|
|
|
/*
|
|
* txIParseContext
|
|
*
|
|
* This interface describes the context needed to create
|
|
* XPath Expressions and XSLT Patters.
|
|
* (not completely though. key() requires the ProcessorState, which is
|
|
* not part of this interface.)
|
|
*/
|
|
|
|
class txIParseContext
|
|
{
|
|
public:
|
|
virtual ~txIParseContext()
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Return a namespaceID for a given prefix.
|
|
*/
|
|
virtual nsresult resolveNamespacePrefix(nsAtom* aPrefix, int32_t& aID) = 0;
|
|
|
|
/*
|
|
* Create a FunctionCall, needed for extension function calls and
|
|
* XSLT. XPath function calls are resolved by the Parser.
|
|
*/
|
|
virtual nsresult resolveFunctionCall(nsAtom* aName, int32_t aID,
|
|
FunctionCall** aFunction) = 0;
|
|
|
|
/**
|
|
* Should nametests parsed in this context be case-sensitive
|
|
*/
|
|
virtual bool caseInsensitiveNameTests() = 0;
|
|
|
|
/*
|
|
* Callback to be used by the Parser if errors are detected.
|
|
*/
|
|
virtual void SetErrorOffset(uint32_t aOffset) = 0;
|
|
|
|
enum Allowed {
|
|
KEY_FUNCTION = 1 << 0
|
|
};
|
|
virtual bool allowed(Allowed aAllowed)
|
|
{
|
|
return true;
|
|
}
|
|
};
|
|
|
|
/*
|
|
* txIMatchContext
|
|
*
|
|
* Interface used for matching XSLT Patters.
|
|
* This is the part of txIEvalContext (see below), that is independent
|
|
* of the context node when evaluating a XPath expression, too.
|
|
* When evaluating a XPath expression, |txIMatchContext|s are used
|
|
* to transport the information from Step to Step.
|
|
*/
|
|
class txIMatchContext
|
|
{
|
|
public:
|
|
virtual ~txIMatchContext()
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Return the ExprResult associated with the variable with the
|
|
* given namespace and local name.
|
|
*/
|
|
virtual nsresult getVariable(int32_t aNamespace, nsAtom* aLName,
|
|
txAExprResult*& aResult) = 0;
|
|
|
|
/*
|
|
* Is whitespace stripping allowed for the given node?
|
|
* See http://www.w3.org/TR/xslt#strip
|
|
*/
|
|
virtual nsresult isStripSpaceAllowed(const txXPathNode& aNode,
|
|
bool& aAllowed) = 0;
|
|
|
|
/**
|
|
* Returns a pointer to the private context
|
|
*/
|
|
virtual void* getPrivateContext() = 0;
|
|
|
|
virtual txResultRecycler* recycler() = 0;
|
|
|
|
/*
|
|
* Callback to be used by the expression/pattern if errors are detected.
|
|
*/
|
|
virtual void receiveError(const nsAString& aMsg, nsresult aRes) = 0;
|
|
};
|
|
|
|
#define TX_DECL_MATCH_CONTEXT \
|
|
nsresult getVariable(int32_t aNamespace, nsAtom* aLName, \
|
|
txAExprResult*& aResult) override; \
|
|
nsresult isStripSpaceAllowed(const txXPathNode& aNode, \
|
|
bool& aAllowed) override; \
|
|
void* getPrivateContext() override; \
|
|
txResultRecycler* recycler() override; \
|
|
void receiveError(const nsAString& aMsg, nsresult aRes) override
|
|
|
|
class txIEvalContext : public txIMatchContext
|
|
{
|
|
public:
|
|
/*
|
|
* Get the context node.
|
|
*/
|
|
virtual const txXPathNode& getContextNode() = 0;
|
|
|
|
/*
|
|
* Get the size of the context node set.
|
|
*/
|
|
virtual uint32_t size() = 0;
|
|
|
|
/*
|
|
* Get the position of the context node in the context node set,
|
|
* starting with 1.
|
|
*/
|
|
virtual uint32_t position() = 0;
|
|
};
|
|
|
|
#define TX_DECL_EVAL_CONTEXT \
|
|
TX_DECL_MATCH_CONTEXT; \
|
|
const txXPathNode& getContextNode() override; \
|
|
uint32_t size() override; \
|
|
uint32_t position() override
|
|
|
|
#endif // __TX_I_XPATH_CONTEXT
|