1 files changed, 118 insertions, 0 deletions
diff --git a/dom/xslt/xpath/txExprResult.h b/dom/xslt/xpath/txExprResult.h
new file mode 100644
index 0000000000..5572b222f5
--- /dev/null
+++ b/dom/xslt/xpath/txExprResult.h
@@ -0,0 +1,118 @@
+/* -*- 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/. */
+
+#ifndef TRANSFRMX_EXPRRESULT_H
+#define TRANSFRMX_EXPRRESULT_H
+
+#include "nsString.h"
+#include "txCore.h"
+#include "txResultRecycler.h"
+
+/*
+ * ExprResult
+ *
+ * Classes Represented:
+ * BooleanResult, ExprResult, NumberResult, StringResult
+ *
+ * Note: for NodeSet, see NodeSet.h
+ */
+
+class txAExprResult {
+ public:
+  friend class txResultRecycler;
+
+  // Update txLiteralExpr::getReturnType and sTypes in txEXSLTFunctions.cpp if
+  // this enum is changed.
+  enum ResultType {
+    NODESET = 0,
+    BOOLEAN,
+    NUMBER,
+    STRING,
+    RESULT_TREE_FRAGMENT
+  };
+
+  explicit txAExprResult(txResultRecycler* aRecycler) : mRecycler(aRecycler) {}
+  virtual ~txAExprResult() = default;
+
+  void AddRef() {
+    ++mRefCnt;
+    NS_LOG_ADDREF(this, mRefCnt, "txAExprResult", sizeof(*this));
+  }
+
+  void Release();  // Implemented in txResultRecycler.cpp
+
+  /**
+   * Returns the type of ExprResult represented
+   * @return the type of ExprResult represented
+   **/
+  virtual short getResultType() = 0;
+
+  /**
+   * Creates a String representation of this ExprResult
+   * @param aResult the destination string to append the String
+   *                representation to.
+   **/
+  virtual void stringValue(nsString& aResult) = 0;
+
+  /**
+   * Returns a pointer to the stringvalue if possible. Otherwise null is
+   * returned.
+   */
+  virtual const nsString* stringValuePointer() = 0;
+
+  /**
+   * Converts this ExprResult to a Boolean (bool) value
+   * @return the Boolean value
+   **/
+  virtual bool booleanValue() = 0;
+
+  /**
+   * Converts this ExprResult to a Number (double) value
+   * @return the Number value
+   **/
+  virtual double numberValue() = 0;
+
+ private:
+  nsAutoRefCnt mRefCnt;
+  RefPtr<txResultRecycler> mRecycler;
+};
+
+#define TX_DECL_EXPRRESULT                               \
+  virtual short getResultType() override;                \
+  virtual void stringValue(nsString& aString) override;  \
+  virtual const nsString* stringValuePointer() override; \
+  virtual bool booleanValue() override;                  \
+  virtual double numberValue() override;
+
+class BooleanResult : public txAExprResult {
+ public:
+  explicit BooleanResult(bool aValue);
+
+  TX_DECL_EXPRRESULT
+
+ private:
+  bool value;
+};
+
+class NumberResult : public txAExprResult {
+ public:
+  NumberResult(double aValue, txResultRecycler* aRecycler);
+
+  TX_DECL_EXPRRESULT
+
+  double value;
+};
+
+class StringResult : public txAExprResult {
+ public:
+  explicit StringResult(txResultRecycler* aRecycler);
+  StringResult(const nsAString& aValue, txResultRecycler* aRecycler);
+
+  TX_DECL_EXPRRESULT
+
+  nsString mValue;
+};
+
+#endif