dom/xslt/xpath/txExprResult.h

   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 #ifndef TRANSFRMX_EXPRRESULT_H
   7 #define TRANSFRMX_EXPRRESULT_H
   8
   9 #include "nsString.h"
  10 #include "txCore.h"
  11 #include "txResultRecycler.h"
  12
  13 /*
  14  * ExprResult
  15  *
  16  * Classes Represented:
  17  * BooleanResult, ExprResult, NumberResult, StringResult
  18  *
  19  * Note: for NodeSet, see NodeSet.h
  20  */
  21
  22 class txAExprResult {
  23  public:
  24   friend class txResultRecycler;
  25
  26   // Update txLiteralExpr::getReturnType and sTypes in txEXSLTFunctions.cpp if
  27   // this enum is changed.
  28   enum ResultType {
  29     NODESET = 0,
  30     BOOLEAN,
  31     NUMBER,
  32     STRING,
  33     RESULT_TREE_FRAGMENT
  34   };
  35
  36   explicit txAExprResult(txResultRecycler* aRecycler) : mRecycler(aRecycler) {}
  37   virtual ~txAExprResult() = default;
  38
  39   void AddRef() {
  40     ++mRefCnt;
  41     NS_LOG_ADDREF(this, mRefCnt, "txAExprResult", sizeof(*this));
  42   }
  43
  44   void Release();  // Implemented in txResultRecycler.cpp
  45
  46   /**
  47    * Returns the type of ExprResult represented
  48    * @return the type of ExprResult represented
  49    **/
  50   virtual short getResultType() = 0;
  51
  52   /**
  53    * Creates a String representation of this ExprResult
  54    * @param aResult the destination string to append the String
  55    *                representation to.
  56    **/
  57   virtual void stringValue(nsString& aResult) = 0;
  58
  59   /**
  60    * Returns a pointer to the stringvalue if possible. Otherwise null is
  61    * returned.
  62    */
  63   virtual const nsString* stringValuePointer() = 0;
  64
  65   /**
  66    * Converts this ExprResult to a Boolean (bool) value
  67    * @return the Boolean value
  68    **/
  69   virtual bool booleanValue() = 0;
  70
  71   /**
  72    * Converts this ExprResult to a Number (double) value
  73    * @return the Number value
  74    **/
  75   virtual double numberValue() = 0;
  76
  77  private:
  78   nsAutoRefCnt mRefCnt;
  79   RefPtr<txResultRecycler> mRecycler;
  80 };
  81
  82 #define TX_DECL_EXPRRESULT                               \
  83   virtual short getResultType() override;                \
  84   virtual void stringValue(nsString& aString) override;  \
  85   virtual const nsString* stringValuePointer() override; \
  86   virtual bool booleanValue() override;                  \
  87   virtual double numberValue() override;
  88
  89 class BooleanResult : public txAExprResult {
  90  public:
  91   explicit BooleanResult(bool aValue);
  92
  93   TX_DECL_EXPRRESULT
  94
  95  private:
  96   bool value;
  97 };
  98
  99 class NumberResult : public txAExprResult {
 100  public:
 101   NumberResult(double aValue, txResultRecycler* aRecycler);
 102
 103   TX_DECL_EXPRRESULT
 104
 105   double value;
 106 };
 107
 108 class StringResult : public txAExprResult {
 109  public:
 110   explicit StringResult(txResultRecycler* aRecycler);
 111   StringResult(const nsAString& aValue, txResultRecycler* aRecycler);
 112
 113   TX_DECL_EXPRRESULT
 114
 115   nsString mValue;
 116 };
 117
 118 #endif