1 files changed, 85 insertions, 0 deletions
diff --git a/dom/xslt/xpath/txUnionExpr.cpp b/dom/xslt/xpath/txUnionExpr.cpp
new file mode 100644
index 0000000000..be8fa47781
--- /dev/null
+++ b/dom/xslt/xpath/txUnionExpr.cpp
@@ -0,0 +1,85 @@
+/* -*- 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/. */
+
+#include "txExpr.h"
+#include "txIXPathContext.h"
+#include "txNodeSet.h"
+
+#ifdef TX_TO_STRING
+#  include "nsReadableUtils.h"
+#endif
+
+//-------------/
+//- UnionExpr -/
+//-------------/
+
+//-----------------------------/
+//- Virtual methods from Expr -/
+//-----------------------------/
+
+/**
+ * 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 UnionExpr::evaluate(txIEvalContext* aContext,
+                             txAExprResult** aResult) {
+  *aResult = nullptr;
+  RefPtr<txNodeSet> nodes;
+  nsresult rv = aContext->recycler()->getNodeSet(getter_AddRefs(nodes));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  uint32_t i, len = mExpressions.Length();
+  for (i = 0; i < len; ++i) {
+    RefPtr<txAExprResult> exprResult;
+    rv = mExpressions[i]->evaluate(aContext, getter_AddRefs(exprResult));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if (exprResult->getResultType() != txAExprResult::NODESET) {
+      // XXX ErrorReport: report nonnodeset error
+      return NS_ERROR_XSLT_NODESET_EXPECTED;
+    }
+
+    RefPtr<txNodeSet> resultSet, ownedSet;
+    resultSet =
+        static_cast<txNodeSet*>(static_cast<txAExprResult*>(exprResult));
+    exprResult = nullptr;
+    rv = aContext->recycler()->getNonSharedNodeSet(resultSet,
+                                                   getter_AddRefs(ownedSet));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = nodes->addAndTransfer(ownedSet);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  *aResult = nodes;
+  NS_ADDREF(*aResult);
+
+  return NS_OK;
+}  //-- evaluate
+
+Expr::ExprType UnionExpr::getType() { return UNION_EXPR; }
+
+TX_IMPL_EXPR_STUBS_LIST(UnionExpr, NODESET_RESULT, mExpressions)
+
+bool UnionExpr::isSensitiveTo(ContextSensitivity aContext) {
+  uint32_t i, len = mExpressions.Length();
+  for (i = 0; i < len; ++i) {
+    if (mExpressions[i]->isSensitiveTo(aContext)) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+#ifdef TX_TO_STRING
+void UnionExpr::toString(nsAString& aDest) {
+  StringJoinAppend(aDest, u" | "_ns, mExpressions,
+                   [](nsAString& dest, Expr* expr) { expr->toString(dest); });
+}
+#endif