1 files changed, 81 insertions, 0 deletions
diff --git a/dom/xslt/xpath/txBooleanExpr.cpp b/dom/xslt/xpath/txBooleanExpr.cpp
new file mode 100644
index 000000000..450d2ab10
--- /dev/null
+++ b/dom/xslt/xpath/txBooleanExpr.cpp
@@ -0,0 +1,81 @@
+/* -*- 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/. */
+
+
+/**
+ * Represents a BooleanExpr, a binary expression that
+ * performs a boolean operation between its lvalue and rvalue.
+**/
+
+#include "txExpr.h"
+#include "txIXPathContext.h"
+
+/**
+ * Evaluates this Expr based on the given context node and processor state
+ * @param context the context node for evaluation of this Expr
+ * @param ps the ContextState containing the stack information needed
+ * for evaluation
+ * @return the result of the evaluation
+**/
+nsresult
+BooleanExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
+{
+    *aResult = nullptr;
+
+    bool lval;
+    nsresult rv = leftExpr->evaluateToBool(aContext, lval);
+    NS_ENSURE_SUCCESS(rv, rv);
+    
+    // check for early decision
+    if (op == OR && lval) {
+        aContext->recycler()->getBoolResult(true, aResult);
+        
+        return NS_OK;
+    }
+    if (op == AND && !lval) {
+        aContext->recycler()->getBoolResult(false, aResult);
+
+        return NS_OK;
+    }
+
+    bool rval;
+    rv = rightExpr->evaluateToBool(aContext, rval);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    // just use rval, since we already checked lval
+    aContext->recycler()->getBoolResult(rval, aResult);
+
+    return NS_OK;
+} //-- evaluate
+
+TX_IMPL_EXPR_STUBS_2(BooleanExpr, BOOLEAN_RESULT, leftExpr, rightExpr)
+
+bool
+BooleanExpr::isSensitiveTo(ContextSensitivity aContext)
+{
+    return leftExpr->isSensitiveTo(aContext) ||
+           rightExpr->isSensitiveTo(aContext);
+}
+
+#ifdef TX_TO_STRING
+void
+BooleanExpr::toString(nsAString& str)
+{
+    if ( leftExpr ) leftExpr->toString(str);
+    else str.AppendLiteral("null");
+
+    switch ( op ) {
+        case OR:
+            str.AppendLiteral(" or ");
+            break;
+        default:
+            str.AppendLiteral(" and ");
+            break;
+    }
+    if ( rightExpr ) rightExpr->toString(str);
+    else str.AppendLiteral("null");
+
+}
+#endif