109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is XSL:P XSLT processor.
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*
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* The Initial Developer of the Original Code is Keith Visco.
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* Portions created by Keith Visco (C) 1999, 2000 Keith Visco.
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* All Rights Reserved.
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*
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* Contributor(s):
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*
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* Keith Visco, kvisco@ziplink.net
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* -- original author.
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*
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*/
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#include "txAtoms.h"
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#include "txIXPathContext.h"
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#include "XSLTFunctions.h"
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#include "prprf.h"
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#include "txNodeSet.h"
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/*
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Implementation of XSLT 1.0 extension function: generate-id
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*/
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#ifndef HAVE_64BIT_OS
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const char GenerateIdFunctionCall::printfFmt[] = "id0x%08p";
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#else
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const char GenerateIdFunctionCall::printfFmt[] = "id0x%016p";
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#endif
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/**
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* Creates a new generate-id function call
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**/
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GenerateIdFunctionCall::GenerateIdFunctionCall()
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{
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}
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/**
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* Evaluates this Expr based on the given context node and processor state
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* @param context the context node for evaluation of this Expr
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* @param ps the ContextState containing the stack information needed
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* for evaluation
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* @return the result of the evaluation
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* @see FunctionCall.h
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**/
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nsresult
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GenerateIdFunctionCall::evaluate(txIEvalContext* aContext,
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txAExprResult** aResult)
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{
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*aResult = nsnull;
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if (!requireParams(0, 1, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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Node* node = 0;
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// get node to generate id for
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if (params.getLength() == 1) {
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txListIterator iter(¶ms);
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Expr* param = (Expr*)iter.next();
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nsRefPtr<txAExprResult> exprResult;
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nsresult rv = param->evaluate(aContext, getter_AddRefs(exprResult));
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NS_ENSURE_SUCCESS(rv, rv);
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if (exprResult->getResultType() != txAExprResult::NODESET) {
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NS_NAMED_LITERAL_STRING(err, "Invalid argument passed to generate-id(), expecting NodeSet");
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aContext->receiveError(err, NS_ERROR_XSLT_NODESET_EXPECTED);
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return NS_ERROR_XSLT_NODESET_EXPECTED;
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}
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txNodeSet* nodes = NS_STATIC_CAST(txNodeSet*,
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NS_STATIC_CAST(txAExprResult*,
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exprResult));
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if (nodes->isEmpty()) {
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aContext->recycler()->getEmptyStringResult(aResult);
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return NS_OK;
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}
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node = nodes->get(0);
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}
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else {
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node = aContext->getContextNode();
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}
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// generate id for selected node
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char buf[22];
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PR_snprintf(buf, 21, printfFmt, node);
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return aContext->recycler()->getStringResult(NS_ConvertASCIItoUCS2(buf),
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aResult);
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}
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nsresult GenerateIdFunctionCall::getNameAtom(nsIAtom** aAtom)
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{
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*aAtom = txXSLTAtoms::generateId;
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NS_ADDREF(*aAtom);
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return NS_OK;
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}
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