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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
/*
* DocumentFunctionCall
* A representation of the XSLT additional function: document()
*/
#include "nsGkAtoms.h"
#include "txIXPathContext.h"
#include "txXSLTFunctions.h"
#include "txExecutionState.h"
#include "txURIUtils.h"
/*
* Creates a new DocumentFunctionCall.
*/
DocumentFunctionCall::DocumentFunctionCall(const nsAString& aBaseURI)
: mBaseURI(aBaseURI) {}
static void retrieveNode(txExecutionState* aExecutionState,
const nsAString& aUri, const nsAString& aBaseUri,
txNodeSet* aNodeSet) {
nsAutoString absUrl;
URIUtils::resolveHref(aUri, aBaseUri, absUrl);
int32_t hash = absUrl.RFindChar(char16_t('#'));
uint32_t urlEnd, fragStart, fragEnd;
if (hash == kNotFound) {
urlEnd = absUrl.Length();
fragStart = 0;
fragEnd = 0;
} else {
urlEnd = hash;
fragStart = hash + 1;
fragEnd = absUrl.Length();
}
nsDependentSubstring docUrl(absUrl, 0, urlEnd);
nsDependentSubstring frag(absUrl, fragStart, fragEnd);
const txXPathNode* loadNode = aExecutionState->retrieveDocument(docUrl);
if (loadNode) {
if (frag.IsEmpty()) {
aNodeSet->add(*loadNode);
} else {
txXPathTreeWalker walker(*loadNode);
if (walker.moveToElementById(frag)) {
aNodeSet->add(walker.getCurrentPosition());
}
}
}
}
/*
* Evaluates this Expr based on the given context node and processor state
* NOTE: the implementation is incomplete since it does not make use of the
* second argument (base URI)
* @param context the context node for evaluation of this Expr
* @return the result of the evaluation
*/
nsresult DocumentFunctionCall::evaluate(txIEvalContext* aContext,
txAExprResult** aResult) {
*aResult = nullptr;
txExecutionState* es =
static_cast<txExecutionState*>(aContext->getPrivateContext());
RefPtr<txNodeSet> nodeSet;
nsresult rv = aContext->recycler()->getNodeSet(getter_AddRefs(nodeSet));
NS_ENSURE_SUCCESS(rv, rv);
// document(object, node-set?)
if (!requireParams(1, 2, aContext)) {
return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
}
RefPtr<txAExprResult> exprResult1;
rv = mParams[0]->evaluate(aContext, getter_AddRefs(exprResult1));
NS_ENSURE_SUCCESS(rv, rv);
nsAutoString baseURI;
bool baseURISet = false;
if (mParams.Length() == 2) {
// We have 2 arguments, get baseURI from the first node
// in the resulting nodeset
RefPtr<txNodeSet> nodeSet2;
rv = evaluateToNodeSet(mParams[1], aContext, getter_AddRefs(nodeSet2));
NS_ENSURE_SUCCESS(rv, rv);
// Make this true, even if nodeSet2 is empty. For relative URLs,
// we'll fail to load the document with an empty base URI, and for
// absolute URLs, the base URI doesn't matter
baseURISet = true;
if (!nodeSet2->isEmpty()) {
rv = txXPathNodeUtils::getBaseURI(nodeSet2->get(0), baseURI);
NS_ENSURE_SUCCESS(rv, rv);
}
}
if (exprResult1->getResultType() == txAExprResult::NODESET) {
// The first argument is a NodeSet, iterate on its nodes
txNodeSet* nodeSet1 =
static_cast<txNodeSet*>(static_cast<txAExprResult*>(exprResult1));
int32_t i;
for (i = 0; i < nodeSet1->size(); ++i) {
const txXPathNode& node = nodeSet1->get(i);
nsAutoString uriStr;
txXPathNodeUtils::appendNodeValue(node, uriStr);
if (!baseURISet) {
// if the second argument wasn't specified, use
// the baseUri of node itself
rv = txXPathNodeUtils::getBaseURI(node, baseURI);
NS_ENSURE_SUCCESS(rv, rv);
}
retrieveNode(es, uriStr, baseURI, nodeSet);
}
NS_ADDREF(*aResult = nodeSet);
return NS_OK;
}
// The first argument is not a NodeSet
nsAutoString uriStr;
exprResult1->stringValue(uriStr);
const nsAString* base = baseURISet ? &baseURI : &mBaseURI;
retrieveNode(es, uriStr, *base, nodeSet);
NS_ADDREF(*aResult = nodeSet);
return NS_OK;
}
Expr::ResultType DocumentFunctionCall::getReturnType() {
return NODESET_RESULT;
}
bool DocumentFunctionCall::isSensitiveTo(ContextSensitivity aContext) {
return (aContext & PRIVATE_CONTEXT) || argsSensitiveTo(aContext);
}
#ifdef TX_TO_STRING
void DocumentFunctionCall::appendName(nsAString& aDest) {
aDest.Append(nsGkAtoms::document->GetUTF16String());
}
#endif
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