| | 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: This file is the implementation of the Preprocessor object |
| | 26 | * for parsing the <!--#echo directive |
| | 27 | * |
| | 28 | ****************************************************************************/ |
| | 29 | |
| | 30 | // Include private headers |
| | 31 | #include "wx/applet/prepecho.h" |
| | 32 | #include "wx/applet/echovar.h" |
| | 33 | |
| | 34 | // Force Link macro |
| | 35 | #include "wx/html/forcelnk.h" |
| | 36 | |
| | 37 | // wxWindows headers |
| | 38 | #include "wx/msgdlg.h" |
| | 39 | |
| | 40 | /*----------------------------- Implementation ----------------------------*/ |
| | 41 | |
| | 42 | /**************************************************************************** |
| | 43 | PARAMETERS: |
| | 44 | text - HTML to process for echo directives |
| | 45 | |
| | 46 | RETURNS: |
| | 47 | The string containing the processed HTML |
| | 48 | |
| | 49 | REMARKS: |
| | 50 | This function replaces #echo directives with a variable retrieved from the |
| | 51 | class given in the HTML directive. These classes are created by making a sub |
| | 52 | class of wxEchoVariable. Dynamic class construction is used at run time |
| | 53 | internally to create an instance of this class and access the value of the |
| | 54 | variable. |
| | 55 | |
| | 56 | SEE ALSO: |
| | 57 | wxEchoVariable |
| | 58 | ****************************************************************************/ |
| | 59 | wxString wxEchoPrep::Process( |
| | 60 | const wxString& text) const |
| | 61 | { |
| | 62 | int i; |
| | 63 | char ft[] = "<!--#echo "; |
| | 64 | |
| | 65 | // make a copy so we can replace text as we go without affecting the original |
| | 66 | wxString output = text; |
| | 67 | |
| | 68 | while ((i = (output.Lower()).Find(ft)) != -1) { |
| | 69 | // Loop until every #echo directive is found |
| | 70 | int n, c, end; |
| | 71 | wxString cname, parms; |
| | 72 | wxString tag; |
| | 73 | |
| | 74 | // grab the tag and remove it from the file |
| | 75 | end = (output.Mid(i)).Find("-->"); |
| | 76 | if (end == -1) { |
| | 77 | #ifdef CHECKED |
| | 78 | wxMessageBox("wxHTML #echo error: Premature end of file while parsing #echo.","Error",wxICON_ERROR); |
| | 79 | #endif |
| | 80 | break; |
| | 81 | } |
| | 82 | |
| | 83 | end += 3; |
| | 84 | tag = output.Mid(i, end); |
| | 85 | output.Remove(i, end); |
| | 86 | |
| | 87 | n = (tag.Lower()).Find(" parm="); |
| | 88 | c = tag.Find("-->"); |
| | 89 | if (n == -1) { |
| | 90 | n = c; |
| | 91 | // find the classname |
| | 92 | c = (tag.Mid(10, n-10)).Find(" "); |
| | 93 | if (c == -1) n -= 10; |
| | 94 | else n = c; |
| | 95 | cname = tag.Mid(10, n); |
| | 96 | |
| | 97 | // grab the value from the class, put it in tag since the data is no longer needed |
| | 98 | tag = wxEchoVariable::GetValue(cname, NULL); |
| | 99 | } |
| | 100 | else { |
| | 101 | // Find the parms |
| | 102 | parms = tag.Mid(n+6, c-n-6); |
| | 103 | // Clip off any quotation marks if they exist. (don't die if there arn't any) |
| | 104 | c = parms.Find("\""); |
| | 105 | if (c != -1) parms = parms.Mid(c+1); |
| | 106 | c = parms.Find("\""); |
| | 107 | if (c != -1) parms = parms.Mid(0, c); |
| | 108 | // find the classname |
| | 109 | c = (tag.Mid(10, n-10)).Find(" "); |
| | 110 | if (c == -1) n -= 10; |
| | 111 | else n = c; |
| | 112 | cname = tag.Mid(10, n); |
| | 113 | |
| | 114 | // grab the value from the class, put it in tag since the data is no longer needed |
| | 115 | tag = wxEchoVariable::GetValue(cname, parms.c_str()); |
| | 116 | } |
| | 117 | // remove ampersands and <> chars |
| | 118 | tag.Replace("&", "&"); |
| | 119 | tag.Replace("<", "<"); |
| | 120 | tag.Replace(">", ">"); |
| | 121 | |
| | 122 | output = (output.Mid(0,i) + tag + output.Mid(i)); |
| | 123 | } |
| | 124 | return output; |
| | 125 | } |
| | 126 | |
| | 127 | FORCE_LINK(echovar) |
| | 128 | |
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