dom/xslt/xpath/txRootExpr.cpp

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   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/. */
   5
   6 #include "txExpr.h"
   7 #include "txNodeSet.h"
   8 #include "txIXPathContext.h"
   9 #include "txXPathTreeWalker.h"
  10
  11 /**
  12  * Evaluates this Expr based on the given context node and processor state
  13  * @param context the context node for evaluation of this Expr
  14  * @param ps the ContextState containing the stack information needed
  15  * for evaluation
  16  * @return the result of the evaluation
  17  **/
  18 nsresult RootExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult) {
  19   txXPathTreeWalker walker(aContext->getContextNode());
  20   walker.moveToRoot();
  21
  22   return aContext->recycler()->getNodeSet(walker.getCurrentPosition(), aResult);
  23 }
  24
  25 TX_IMPL_EXPR_STUBS_0(RootExpr, NODESET_RESULT)
  26
  27 bool RootExpr::isSensitiveTo(ContextSensitivity aContext) {
  28   return !!(aContext & NODE_CONTEXT);
  29 }
  30
  31 #ifdef TX_TO_STRING
  32 void RootExpr::toString(nsAString& dest) {
  33   if (mSerialize) dest.Append(char16_t('/'));
  34 }
  35 #endif