78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
#include "XSLTFunctions.h"
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#include "XMLUtils.h"
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#include "Names.h"
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#include "txIXPathContext.h"
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const String XSL_VERSION_PROPERTY("version");
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const String XSL_VENDOR_PROPERTY("vendor");
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const String XSL_VENDOR_URL_PROPERTY("vendor-url");
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/*
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Implementation of XSLT 1.0 extension function: system-property
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*/
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/**
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* Creates a new system-property function call
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* aNode is the Element in the stylesheet containing the
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* Expr and is used for namespaceID resolution
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**/
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SystemPropertyFunctionCall::SystemPropertyFunctionCall(Element* aNode) :
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mStylesheetNode(aNode), FunctionCall(SYSTEM_PROPERTY_FN)
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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 cs 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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ExprResult* SystemPropertyFunctionCall::evaluate(txIEvalContext* aContext)
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{
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ExprResult* result = NULL;
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if (requireParams(1, 1, aContext)) {
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txListIterator iter(¶ms);
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Expr* param = (Expr*)iter.next();
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ExprResult* exprResult = param->evaluate(aContext);
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if (exprResult->getResultType() == ExprResult::STRING) {
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String property;
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exprResult->stringValue(property);
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if (XMLUtils::isValidQName(property)) {
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String prefix;
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PRInt32 namespaceID = kNameSpaceID_None;
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XMLUtils::getPrefix(property, prefix);
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if (!prefix.isEmpty()) {
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txAtom* prefixAtom = TX_GET_ATOM(prefix);
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namespaceID =
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mStylesheetNode->lookupNamespaceID(prefixAtom);
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TX_IF_RELEASE_ATOM(prefixAtom);
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}
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if (namespaceID == kNameSpaceID_XSLT) {
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String localName;
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XMLUtils::getLocalPart(property, localName);
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if (localName.isEqual(XSL_VERSION_PROPERTY))
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result = new NumberResult(1.0);
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else if (localName.isEqual(XSL_VENDOR_PROPERTY))
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result = new StringResult("Transformiix");
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else if (localName.isEqual(XSL_VENDOR_URL_PROPERTY))
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result = new StringResult("http://www.mozilla.org/projects/xslt/");
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}
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}
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}
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else {
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String err("Invalid argument passed to system-property(), expecting String");
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aContext->receiveError(err, NS_ERROR_XPATH_INVALID_ARG);
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result = new StringResult(err);
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}
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}
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if (result)
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return result;
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else
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return new StringResult("");
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}
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