contrib/src/applet/ifelsevar.cpp

   1 /****************************************************************************
   2 *
   3 *                       wxWindows HTML Applet Package
   4 *
   5 *               Copyright (C) 1991-2001 SciTech Software, Inc.
   6 *                            All rights reserved.
   7 *
   8 *  ========================================================================
   9 *
  10 *    The contents of this file are subject to the wxWindows License
  11 *    Version 3.0 (the "License"); you may not use this file except in
  12 *    compliance with the License. You may obtain a copy of the License at
  13 *    http://www.wxwindows.org/licence3.txt
  14 *
  15 *    Software distributed under the License is distributed on an
  16 *    "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  17 *    implied. See the License for the specific language governing
  18 *    rights and limitations under the License.
  19 *
  20 *  ========================================================================
  21 *
  22 * Language:             ANSI C++
  23 * Environment:  Any
  24 *
  25 * Description:  Implementation of wxIfElseVariable Class, Dynamically constructed
  26 * objects representing variables in SSI #if, #else, and #endif directives
  27 *
  28 ****************************************************************************/
  29
  30 // For compilers that support precompilation
  31 #include "wx/wxprec.h"
  32 #include "wx/html/forcelnk.h"
  33
  34 // Include private headers
  35 #include "wx/applet/ifelsevar.h"
  36
  37 /*---------------------------- Global variables ---------------------------*/
  38
  39 // Implement the dynamic class so it can be constructed dynamically
  40 IMPLEMENT_ABSTRACT_CLASS(wxIfElseVariable, wxObject);
  41
  42 /*----------------------------- Implementation ----------------------------*/
  43
  44 /****************************************************************************
  45 PARAMETERS:
  46 cls     - The String name of the class
  47
  48 RETURNS:
  49 The boolean value of the variable
  50
  51 REMARKS:
  52 To grab a value from any class which is derived from this one simple use this
  53 static function and the name of the derived class to get the value.
  54 This static function is the only function implemented in this base class
  55 basically this is provided for an easier method of grabbing a variable. We
  56 keep all the dynamic object handling in this class to avoid confusing the source
  57 where these are used.
  58
  59 SEE ALSO:
  60 wxIfElsePrep
  61 ****************************************************************************/
  62 static bool wxIfElseVariable::FindValue(
  63     const wxString &cls)
  64 {
  65     wxObject * tmpclass;
  66
  67     tmpclass = wxCreateDynamicObject(wxString("wxIfElseVariable") + cls);
  68     if (!tmpclass) {
  69 #ifdef CHECKED
  70         wxMessageBox(wxString("wxHTML #if error: Class not found (") + cls + wxString(")."),"Error",wxICON_ERROR);
  71 #endif
  72         return wxString("");
  73         }
  74
  75     wxIfElseVariable * ev = wxDynamicCast(tmpclass, wxIfElseVariable);
  76
  77     if (!ev) {
  78 #ifdef CHECKED
  79         wxMessageBox(wxString("wxHTML #if error: Class is not a valid ifelse variable (") + cls + wxString(")."),"Error",wxICON_ERROR);
  80 #endif
  81         return wxString("");
  82                 }
  83
  84     return ev->GetValue();
  85 }
  86
  87 /*------------------------ Macro Documentation ---------------------------*/
  88
  89 // Here we declare some fake functions to get doc-jet to properly document the macros
  90
  91 #undef BEGIN_IFELSE_VARIABLE
  92 /****************************************************************************
  93 PARAMETERS:
  94 name    - The name of the variable to create
  95
  96 REMARKS:
  97 This macro is used to create variables for use by the #if, #else and #endif
  98 blocks in the HTML preprocessor.
  99 To create a new variable include the code necessary to get the value of the
 100 variable between a block of BEGIN_IFELSE_VARIABLE and END_IFELSE_VARIABLE macros.
 101
 102 EXAMPLE:
 103 BEGIN_IFELSE_VARIABLE(UserName)
 104         // Get username from nucleus
 105         bool tmp = GA_HasRegistered();
 106 END_IFELSE_VARIABLE(UserName, tmp)
 107
 108 SEE ALSO:
 109 wxIfElseVariable, wxIfElsePrep, END_IFELSE_VARIABLE, IFELSE_VARIABLE
 110 ****************************************************************************/
 111 void BEGIN_IFELSE_VARIABLE(
 112     const char *name);
 113
 114 #undef END_IFELSE_VARIABLE
 115 /****************************************************************************
 116 PARAMETERS:
 117 name        - The name of the variable to end
 118 returnval   - The boolean value which is the value of the variable
 119
 120 REMARKS:
 121 This macro is used to create variables for use by the #if, #else and #endif
 122 blocks in the HTML preprocessor.
 123 To create a new variable include the code necessary to get the value of the
 124 variable between a block of BEGIN_IFELSE_VARIABLE and END_IFELSE_VARIABLE macros.
 125
 126 EXAMPLE:
 127 BEGIN_IFELSE_VARIABLE(UserName)
 128         // Get username from nucleus
 129         bool tmp = GA_HasRegistered();
 130 END_IFELSE_VARIABLE(UserName, tmp)
 131
 132 SEE ALSO:
 133 wxIfElseVariable, wxIfElsePrep, BEGIN_IFELSE_VARIABLE, IFELSE_VARIABLE
 134 ****************************************************************************/
 135 void END_IFELSE_VARIABLE(
 136     const char *name,
 137     bool returnval);
 138
 139 #undef IFELSE_VARIABLE
 140 /****************************************************************************
 141 PARAMETERS:
 142 name        - The name of the variable
 143 state       - value of the variable
 144
 145 REMARKS:
 146 This macro is used to create constant boolean variables for use by the
 147 #if, #else and #endif blocks in the HTML preprocessor.
 148 This MACRO creates a variable that simply returns the given state and is
 149 not modifiable.
 150
 151 SEE ALSO:
 152 wxIfElseVariable, wxIfElsePrep, BEGIN_IFELSE_VARIABLE, END_IFELSE_VARIABLE
 153 ****************************************************************************/
 154 void IFELSE_VARIABLE(
 155     const char *name,
 156     bool state);
 157
 158
 159 FORCE_LINK_ME(ifelsevar)