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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/. */
#include "nsGkAtoms.h"
#include "txIXPathContext.h"
#include "txNodeSet.h"
#include "txXPathTreeWalker.h"
#include "txXSLTFunctions.h"
#include "txExecutionState.h"
/*
Implementation of XSLT 1.0 extension function: generate-id
*/
/**
* Creates a new generate-id function call
**/
GenerateIdFunctionCall::GenerateIdFunctionCall()
{
}
/**
* Evaluates this Expr based on the given context node and processor state
* @param context the context node for evaluation of this Expr
* @param ps the ContextState containing the stack information needed
* for evaluation
* @return the result of the evaluation
* @see FunctionCall.h
**/
nsresult
GenerateIdFunctionCall::evaluate(txIEvalContext* aContext,
txAExprResult** aResult)
{
*aResult = nullptr;
if (!requireParams(0, 1, aContext))
return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
txExecutionState* es =
static_cast<txExecutionState*>(aContext->getPrivateContext());
if (!es) {
NS_ERROR(
"called xslt extension function \"generate-id\" with wrong context");
return NS_ERROR_UNEXPECTED;
}
nsresult rv = NS_OK;
if (mParams.IsEmpty()) {
StringResult* strRes;
rv = aContext->recycler()->getStringResult(&strRes);
NS_ENSURE_SUCCESS(rv, rv);
txXPathNodeUtils::getXSLTId(aContext->getContextNode(),
es->getSourceDocument(),
strRes->mValue);
*aResult = strRes;
return NS_OK;
}
RefPtr<txNodeSet> nodes;
rv = evaluateToNodeSet(mParams[0], aContext,
getter_AddRefs(nodes));
NS_ENSURE_SUCCESS(rv, rv);
if (nodes->isEmpty()) {
aContext->recycler()->getEmptyStringResult(aResult);
return NS_OK;
}
StringResult* strRes;
rv = aContext->recycler()->getStringResult(&strRes);
NS_ENSURE_SUCCESS(rv, rv);
txXPathNodeUtils::getXSLTId(nodes->get(0), es->getSourceDocument(),
strRes->mValue);
*aResult = strRes;
return NS_OK;
}
Expr::ResultType
GenerateIdFunctionCall::getReturnType()
{
return STRING_RESULT;
}
bool
GenerateIdFunctionCall::isSensitiveTo(ContextSensitivity aContext)
{
if (aContext & PRIVATE_CONTEXT) {
return true;
}
if (mParams.IsEmpty()) {
return !!(aContext & NODE_CONTEXT);
}
return argsSensitiveTo(aContext);
}
#ifdef TX_TO_STRING
nsresult
GenerateIdFunctionCall::getNameAtom(nsIAtom** aAtom)
{
*aAtom = nsGkAtoms::generateId;
NS_ADDREF(*aAtom);
return NS_OK;
}
#endif
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