1 files changed, 78 insertions, 0 deletions
diff --git a/dom/xslt/xpath/txBooleanExpr.cpp b/dom/xslt/xpath/txBooleanExpr.cpp
new file mode 100644
index 0000000000..0f4366ff76
--- /dev/null
+++ b/dom/xslt/xpath/txBooleanExpr.cpp
@@ -0,0 +1,78 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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