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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
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30// Include private headers
31#include "wx/applet/prepecho.h"
32#include "wx/applet/echovar.h"
33
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34// Force Link macro
35#include "wx/html/forcelnk.h"
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37// wxWindows headers
38#include "wx/msgdlg.h"
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39
40/*----------------------------- Implementation ----------------------------*/
41
42/****************************************************************************
43PARAMETERS:
44text - HTML to process for echo directives
45
46RETURNS:
47The string containing the processed HTML
48
49REMARKS:
50This function replaces #echo directives with a variable retrieved from the
51class given in the HTML directive. These classes are created by making a sub
52class of wxEchoVariable. Dynamic class construction is used at run time
53internally to create an instance of this class and access the value of the
54variable.
55
56SEE ALSO:
57wxEchoVariable
58****************************************************************************/
59wxString 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
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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
574c939e 98 tag = wxEchoVariable::GetValue(cname, NULL);
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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
574c939e 115 tag = wxEchoVariable::GetValue(cname, parms.c_str());
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116 }
117 // remove ampersands and <> chars
118 tag.Replace("&", "&amp;");
119 tag.Replace("<", "&lt;");
120 tag.Replace(">", "&gt;");
121
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122 output = (output.Mid(0,i) + tag + output.Mid(i));
123 }
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124 return output;
125}
126
127FORCE_LINK(echovar)
128