The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/content/xul/templates/src/nsInstantiationNode.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,87 @@
     1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
     1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
     1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.8 +
     1.9 +#include "nsInstantiationNode.h"
    1.10 +#include "nsTemplateRule.h"
    1.11 +#include "nsXULTemplateQueryProcessorRDF.h"
    1.12 +
    1.13 +#include "prlog.h"
    1.14 +#ifdef PR_LOGGING
    1.15 +extern PRLogModuleInfo* gXULTemplateLog;
    1.16 +#endif
    1.17 +
    1.18 +nsInstantiationNode::nsInstantiationNode(nsXULTemplateQueryProcessorRDF* aProcessor,
    1.19 +                                         nsRDFQuery* aQuery)
    1.20 +        : mProcessor(aProcessor),
    1.21 +          mQuery(aQuery)
    1.22 +{
    1.23 +#ifdef PR_LOGGING
    1.24 +    PR_LOG(gXULTemplateLog, PR_LOG_DEBUG,
    1.25 +           ("nsInstantiationNode[%p] query=%p", this, aQuery));
    1.26 +#endif
    1.27 +
    1.28 +    MOZ_COUNT_CTOR(nsInstantiationNode);
    1.29 +}
    1.30 +
    1.31 +
    1.32 +nsInstantiationNode::~nsInstantiationNode()
    1.33 +{
    1.34 +    MOZ_COUNT_DTOR(nsInstantiationNode);
    1.35 +}
    1.36 +
    1.37 +nsresult
    1.38 +nsInstantiationNode::Propagate(InstantiationSet& aInstantiations,
    1.39 +                               bool aIsUpdate, bool& aTakenInstantiations)
    1.40 +{
    1.41 +    // In update mode, iterate through the results and call the template
    1.42 +    // builder to update them. In non-update mode, cache them in the processor
    1.43 +    // to be used during processing. The results are cached in the processor
    1.44 +    // so that the simple rules are only computed once. In this situation, all
    1.45 +    // data for all queries are calculated at once.
    1.46 +    nsresult rv = NS_OK;
    1.47 +
    1.48 +    aTakenInstantiations = false;
    1.49 +
    1.50 +    if (aIsUpdate) {
    1.51 +        // Iterate through newly added keys to determine which rules fired.
    1.52 +        //
    1.53 +        // XXXwaterson Unfortunately, this could also lead to retractions;
    1.54 +        // e.g., (container ?a ^empty false) could become "unmatched". How
    1.55 +        // to track those?
    1.56 +        nsCOMPtr<nsIDOMNode> querynode;
    1.57 +        mQuery->GetQueryNode(getter_AddRefs(querynode));
    1.58 +
    1.59 +        InstantiationSet::ConstIterator last = aInstantiations.Last();
    1.60 +        for (InstantiationSet::ConstIterator inst = aInstantiations.First(); inst != last; ++inst) {
    1.61 +            nsAssignmentSet assignments = inst->mAssignments;
    1.62 +
    1.63 +            nsCOMPtr<nsIRDFNode> node;
    1.64 +            assignments.GetAssignmentFor(mQuery->mMemberVariable,
    1.65 +                                         getter_AddRefs(node));
    1.66 +            if (node) {
    1.67 +                nsCOMPtr<nsIRDFResource> resource = do_QueryInterface(node);
    1.68 +                if (resource) {
    1.69 +                    nsRefPtr<nsXULTemplateResultRDF> nextresult =
    1.70 +                        new nsXULTemplateResultRDF(mQuery, *inst, resource);
    1.71 +                    if (! nextresult)
    1.72 +                        return NS_ERROR_OUT_OF_MEMORY;
    1.73 +
    1.74 +                    rv = mProcessor->AddMemoryElements(*inst, nextresult);
    1.75 +                    if (NS_FAILED(rv))
    1.76 +                        return rv;
    1.77 +
    1.78 +                    mProcessor->GetBuilder()->AddResult(nextresult, querynode);
    1.79 +                }
    1.80 +            }
    1.81 +        }
    1.82 +    }
    1.83 +    else {
    1.84 +        nsresult rv = mQuery->SetCachedResults(mProcessor, aInstantiations);
    1.85 +        if (NS_SUCCEEDED(rv))
    1.86 +            aTakenInstantiations = true;
    1.87 +    }
    1.88 +
    1.89 +    return rv;
    1.90 +}