src/esi/Assign.h

   1 /*
   2  * Copyright (C) 1996-2014 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 /* DEBUG: section 86    ESI processing */
  10
  11 #ifndef SQUID_ESIASSIGN_H
  12 #define SQUID_ESIASSIGN_H
  13
  14 #include "esi/Element.h"
  15 #include "esi/VarState.h"
  16 #include "SquidString.h"
  17
  18 /* ESIVariableExpression */
  19 /* This is a variable that is itself and expression */
  20
  21 class ESIVariableExpression : public ESIVarState::Variable
  22 {
  23
  24 public:
  25     ~ESIVariableExpression();
  26     ESIVariableExpression (String const &value);
  27     virtual void eval (ESIVarState &state, char const *, char const *) const;
  28
  29 private:
  30     String expression;
  31 };
  32
  33 /* ESIAssign */
  34
  35 class ESIContext;
  36
  37 class ESIAssign : public ESIElement
  38 {
  39
  40 public:
  41     MEMPROXY_CLASS(ESIAssign);
  42     ESIAssign (esiTreeParentPtr, int, const char **, ESIContext *);
  43     ESIAssign (ESIAssign const &);
  44     ESIAssign &operator=(ESIAssign const &);
  45     ~ESIAssign();
  46     esiProcessResult_t process (int dovars);
  47     void render(ESISegment::Pointer);
  48     bool addElement(ESIElement::Pointer);
  49     void provideData (ESISegment::Pointer data, ESIElement * source);
  50     Pointer makeCacheable() const;
  51     Pointer makeUsable(esiTreeParentPtr, ESIVarState &) const;
  52     void finish();
  53
  54 private:
  55     void evaluateVariable();
  56     esiTreeParentPtr parent;
  57     ESIVarState *varState;
  58     String name;
  59     ESIVariableExpression * value;
  60     ESIElement::Pointer variable;
  61     String unevaluatedVariable;
  62 };
  63
  64 MEMPROXY_CLASS_INLINE(ESIAssign);
  65
  66 #endif /* SQUID_ESIASSIGN_H */