96 lines
3.8 KiB
C
96 lines
3.8 KiB
C
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/****************************************************************************
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*
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* wxWindows HTML Applet Package
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*
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* Copyright (C) 1991-2001 SciTech Software, Inc.
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* All rights reserved.
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*
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* ========================================================================
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*
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* The contents of this file are subject to the wxWindows License
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* Version 3.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.wxwindows.org/licence3.txt
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*
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* Software distributed under the License is distributed on an
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* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* ========================================================================
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*
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* Language: ANSI C++
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* Environment: Any
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*
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* Description: Header file for wxEchoVariable Class, Dynamically constructed
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* objects representing variables in SSI #echo directive
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*
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****************************************************************************/
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#ifndef __WX_ECHOVAR_H
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#define __WX_ECHOVAR_H
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/*--------------------------- Class Definitions ---------------------------*/
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/****************************************************************************
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REMARKS:
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wxEchoVariable class Definition
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****************************************************************************/
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class wxEchoVariable : public wxObject {
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private:
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DECLARE_ABSTRACT_CLASS(wxEchoVariable);
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public:
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wxEchoVariable() : wxObject() {}
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~wxEchoVariable() {}
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/****************************************************************************
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RETURNS:
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The boolean value of the variable
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PARAMETERS:
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parms - Optional parameter string passed from parm= field in HTML
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REMARKS:
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To create new variables for the #echo HTML preprocessing directives
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you need to derive classes from wxEchoVariable and override the
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pure virtual GetValue function. However this should not be done directly
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but by using the BEGIN_ECHO_VARIABLE and END_ECHO_VARIABLE macros
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SEE ALSO:
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wxEchoPrep, BEGIN_ECHO_VARIABLE, END_ECHO_VARIABLE
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****************************************************************************/
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virtual wxString GetValue(const char *parms = NULL) const = 0;
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public:
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// static function to retrieve any variable avaliable
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static wxString GetValue(const wxString &cls, const char *parms = NULL);
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};
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/*--------------------------------- MACROS --------------------------------*/
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#define ECHO_PARM (_BEV_parm)
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#define BEGIN_ECHO_VARIABLE(name) \
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class wxEchoVariable##name : public wxEchoVariable { \
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private: \
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DECLARE_DYNAMIC_CLASS(wxEchoVariable##name##); \
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public: \
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wxEchoVariable##name##() : wxEchoVariable() {} \
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virtual wxString GetValue(const char *parms = NULL) const; \
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}; \
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IMPLEMENT_DYNAMIC_CLASS(wxEchoVariable##name##, wxEchoVariable); \
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wxString wxEchoVariable##name :: GetValue(const char *parms) const { \
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wxString _BEV_parm = wxString(parms);
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#define END_ECHO_VARIABLE(name, returnval) \
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return returnval; \
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}
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#define STRING_ECHO_VARIABLE(name, string) \
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BEGIN_ECHO_VARIABLE(##name##); \
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END_ECHO_VARIABLE(##name##, wxString(##string##))
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#endif // __WX_ECHOVAR_H
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