The Tor Browser: dom/xslt/xpath/txUnionExpr.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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 "txExpr.h"

     7 #include "txIXPathContext.h"

     8 #include "txNodeSet.h"

    10   //-------------/

    11  //- UnionExpr -/

    12 //-------------/

    14     //-----------------------------/

    15   //- Virtual methods from Expr -/

    16 //-----------------------------/

    18 /**

    19  * Evaluates this Expr based on the given context node and processor state

    20  * @param context the context node for evaluation of this Expr

    21  * @param ps the ContextState containing the stack information needed

    22  * for evaluation

    23  * @return the result of the evaluation

    24 **/

    25 nsresult

    26 UnionExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)

    27 {

    28     *aResult = nullptr;

    29     nsRefPtr<txNodeSet> nodes;

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

    31     NS_ENSURE_SUCCESS(rv, rv);

    33     uint32_t i, len = mExpressions.Length();

    34     for (i = 0; i < len; ++i) {

    35         nsRefPtr<txAExprResult> exprResult;

    36         rv = mExpressions[i]->evaluate(aContext, getter_AddRefs(exprResult));

    37         NS_ENSURE_SUCCESS(rv, rv);

    39         if (exprResult->getResultType() != txAExprResult::NODESET) {

    40             //XXX ErrorReport: report nonnodeset error

    41             return NS_ERROR_XSLT_NODESET_EXPECTED;

    42         }

    44         nsRefPtr<txNodeSet> resultSet, ownedSet;

    45         resultSet = static_cast<txNodeSet*>

    46                                (static_cast<txAExprResult*>(exprResult));

    47         exprResult = nullptr;

    48         rv = aContext->recycler()->

    49             getNonSharedNodeSet(resultSet, getter_AddRefs(ownedSet));

    50         NS_ENSURE_SUCCESS(rv, rv);

    52         rv = nodes->addAndTransfer(ownedSet);

    53         NS_ENSURE_SUCCESS(rv, rv);

    54     }

    56     *aResult = nodes;

    57     NS_ADDREF(*aResult);

    59     return NS_OK;

    60 } //-- evaluate

    62 Expr::ExprType

    63 UnionExpr::getType()

    64 {

    65   return UNION_EXPR;

    66 }

    68 TX_IMPL_EXPR_STUBS_LIST(UnionExpr, NODESET_RESULT, mExpressions)

    70 bool

    71 UnionExpr::isSensitiveTo(ContextSensitivity aContext)

    72 {

    73     uint32_t i, len = mExpressions.Length();

    74     for (i = 0; i < len; ++i) {

    75         if (mExpressions[i]->isSensitiveTo(aContext)) {

    76             return true;

    77         }

    78     }

    80     return false;

    81 }

    83 #ifdef TX_TO_STRING

    84 void

    85 UnionExpr::toString(nsAString& dest)

    86 {

    87     uint32_t i;

    88     for (i = 0; i < mExpressions.Length(); ++i) {

    89         if (i > 0)

    90             dest.AppendLiteral(" | ");

    91         mExpressions[i]->toString(dest);

    92     }

    93 }

    94 #endif

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