/* -*- 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 "nsInstantiationNode.h" #include "nsTemplateRule.h" #include "nsXULTemplateQueryProcessorRDF.h" #include "mozilla/Logging.h" extern mozilla::LazyLogModule gXULTemplateLog; nsInstantiationNode::nsInstantiationNode(nsXULTemplateQueryProcessorRDF* aProcessor, nsRDFQuery* aQuery) : mProcessor(aProcessor), mQuery(aQuery) { MOZ_LOG(gXULTemplateLog, LogLevel::Debug, ("nsInstantiationNode[%p] query=%p", this, aQuery)); MOZ_COUNT_CTOR(nsInstantiationNode); } nsInstantiationNode::~nsInstantiationNode() { MOZ_COUNT_DTOR(nsInstantiationNode); } nsresult nsInstantiationNode::Propagate(InstantiationSet& aInstantiations, bool aIsUpdate, bool& aTakenInstantiations) { // In update mode, iterate through the results and call the template // builder to update them. In non-update mode, cache them in the processor // to be used during processing. The results are cached in the processor // so that the simple rules are only computed once. In this situation, all // data for all queries are calculated at once. nsresult rv = NS_OK; aTakenInstantiations = false; if (aIsUpdate) { // Iterate through newly added keys to determine which rules fired. // // XXXwaterson Unfortunately, this could also lead to retractions; // e.g., (container ?a ^empty false) could become "unmatched". How // to track those? nsCOMPtr<nsIDOMNode> querynode; mQuery->GetQueryNode(getter_AddRefs(querynode)); InstantiationSet::ConstIterator last = aInstantiations.Last(); for (InstantiationSet::ConstIterator inst = aInstantiations.First(); inst != last; ++inst) { nsAssignmentSet assignments = inst->mAssignments; nsCOMPtr<nsIRDFNode> node; assignments.GetAssignmentFor(mQuery->mMemberVariable, getter_AddRefs(node)); if (node) { nsCOMPtr<nsIRDFResource> resource = do_QueryInterface(node); if (resource) { RefPtr<nsXULTemplateResultRDF> nextresult = new nsXULTemplateResultRDF(mQuery, *inst, resource); if (! nextresult) return NS_ERROR_OUT_OF_MEMORY; rv = mProcessor->AddMemoryElements(*inst, nextresult); if (NS_FAILED(rv)) return rv; mProcessor->GetBuilder()->AddResult(nextresult, querynode); } } } } else { nsresult rv = mQuery->SetCachedResults(mProcessor, aInstantiations); if (NS_SUCCEEDED(rv)) aTakenInstantiations = true; } return rv; }