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