The Tor Browser: dom/xslt/xpath/txNamedAttributeStep.cpp@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "nsIAtom.h"

     7 #include "txIXPathContext.h"

     8 #include "txNodeSet.h"

     9 #include "txExpr.h"

    10 #include "txXPathTreeWalker.h"

    12 txNamedAttributeStep::txNamedAttributeStep(int32_t aNsID,

    13                                            nsIAtom* aPrefix,

    14                                            nsIAtom* aLocalName)

    15     : mNamespace(aNsID),

    16       mPrefix(aPrefix),

    17       mLocalName(aLocalName)

    18 {

    19 }

    21 nsresult

    22 txNamedAttributeStep::evaluate(txIEvalContext* aContext,

    23                                txAExprResult** aResult)

    24 {

    25     *aResult = nullptr;

    27     nsRefPtr<txNodeSet> nodes;

    28     nsresult rv = aContext->recycler()->getNodeSet(getter_AddRefs(nodes));

    29     NS_ENSURE_SUCCESS(rv, rv);

    31     txXPathTreeWalker walker(aContext->getContextNode());

    32     if (walker.moveToNamedAttribute(mLocalName, mNamespace)) {

    33         rv = nodes->append(walker.getCurrentPosition());

    34         NS_ENSURE_SUCCESS(rv, rv);

    35     }

    36     NS_ADDREF(*aResult = nodes);

    38     return NS_OK;

    39 }

    41 TX_IMPL_EXPR_STUBS_0(txNamedAttributeStep, NODESET_RESULT)

    43 bool

    44 txNamedAttributeStep::isSensitiveTo(ContextSensitivity aContext)

    45 {

    46     return !!(aContext & NODE_CONTEXT);

    47 }

    49 #ifdef TX_TO_STRING

    50 void

    51 txNamedAttributeStep::toString(nsAString& aDest)

    52 {

    53     aDest.Append(char16_t('@'));

    54     if (mPrefix) {

    55         nsAutoString prefix;

    56         mPrefix->ToString(prefix);

    57         aDest.Append(prefix);

    58         aDest.Append(char16_t(':'));

    59     }

    60     nsAutoString localName;

    61     mLocalName->ToString(localName);

    62     aDest.Append(localName);

    63 }

    64 #endif

The Tor Browser / file revision

dom/xslt/xpath/txNamedAttributeStep.cpp@97036ab72558

dom/xslt/xpath/txNamedAttributeStep.cpp