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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: filter.cpp
3 // Purpose: wxHtmlFilter - input filter for translating into HTML format
4 // Author: Vaclav Slavik
5 // Copyright: (c) 1999 Vaclav Slavik
6 // Licence: wxWindows Licence
7 /////////////////////////////////////////////////////////////////////////////
8
9
10 #ifdef __GNUG__
11 #pragma implementation "htmlfilter.h"
12 #endif
13
14 #include "wx/wxprec.h"
15
16 #if wxUSE_HTML
17
18 #ifdef __BORDLANDC__
19 #pragma hdrstop
20 #endif
21
22 #ifndef WXPRECOMP
23 #endif
24
25 #include "wx/html/htmlfilter.h"
26 #include "wx/html/htmlwin.h"
27
28
29 /*
30
31 There is code for several default filters:
32
33 */
34
35 IMPLEMENT_ABSTRACT_CLASS(wxHtmlFilter, wxObject)
36
37 //--------------------------------------------------------------------------------
38 // wxHtmlFilterPlainText
39 // filter for text/plain or uknown
40 //--------------------------------------------------------------------------------
41
42 IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterPlainText, wxHtmlFilter)
43
44 bool wxHtmlFilterPlainText::CanRead(const wxFSFile& WXUNUSED(file)) const
45 {
46 return TRUE;
47 }
48
49
50
51 wxString wxHtmlFilterPlainText::ReadFile(const wxFSFile& file) const
52 {
53 wxInputStream *s = file.GetStream();
54 char *src;
55 wxString doc, doc2;
56
57 if (s == NULL) return wxEmptyString;
58 src = new char[s -> GetSize()+1];
59 src[s -> GetSize()] = 0;
60 s -> Read(src, s -> GetSize());
61 doc = src;
62 delete [] src;
63
64 doc.Replace(_T("<"), _T("&lt;"), TRUE);
65 doc.Replace(_T(">"), _T("&gt;"), TRUE);
66 doc2 = _T("<HTML><BODY><PRE>\n") + doc + _T("\n</PRE></BODY></HTML>");
67 return doc2;
68 }
69
70
71
72
73
74 //--------------------------------------------------------------------------------
75 // wxHtmlFilterImage
76 // filter for image/*
77 //--------------------------------------------------------------------------------
78
79 class wxHtmlFilterImage : public wxHtmlFilter
80 {
81 DECLARE_DYNAMIC_CLASS(wxHtmlFilterImage)
82
83 public:
84 virtual bool CanRead(const wxFSFile& file) const;
85 virtual wxString ReadFile(const wxFSFile& file) const;
86 };
87
88 IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterImage, wxHtmlFilter)
89
90
91
92 bool wxHtmlFilterImage::CanRead(const wxFSFile& file) const
93 {
94 return (file.GetMimeType().Left(6) == "image/");
95 }
96
97
98
99 wxString wxHtmlFilterImage::ReadFile(const wxFSFile& file) const
100 {
101 return ("<HTML><BODY><IMG SRC=\"" + file.GetLocation() + "\"></BODY></HTML>");
102 }
103
104
105
106
107 //--------------------------------------------------------------------------------
108 // wxHtmlFilterPlainText
109 // filter for text/plain or uknown
110 //--------------------------------------------------------------------------------
111
112 class wxHtmlFilterHTML : public wxHtmlFilter
113 {
114 DECLARE_DYNAMIC_CLASS(wxHtmlFilterHTML)
115
116 public:
117 virtual bool CanRead(const wxFSFile& file) const;
118 virtual wxString ReadFile(const wxFSFile& file) const;
119 };
120
121
122 IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterHTML, wxHtmlFilter)
123
124 bool wxHtmlFilterHTML::CanRead(const wxFSFile& file) const
125 {
126 // return (file.GetMimeType() == "text/html");
127 // This is true in most case but some page can return:
128 // "text/html; char-encoding=...."
129 // So we use Find instead
130 return (file.GetMimeType().Find(_T("text/html")) == 0);
131 }
132
133
134
135 wxString wxHtmlFilterHTML::ReadFile(const wxFSFile& file) const
136 {
137 wxInputStream *s = file.GetStream();
138 char *src;
139 wxString doc;
140
141 if (s == NULL) return wxEmptyString;
142 src = new char[s -> GetSize() + 1];
143 src[s -> GetSize()] = 0;
144 s -> Read(src, s -> GetSize());
145 doc = src;
146 delete[] src;
147
148 return doc;
149 }
150
151
152
153
154 ///// Module:
155
156 class wxHtmlFilterModule : public wxModule
157 {
158 DECLARE_DYNAMIC_CLASS(wxHtmlFilterModule)
159
160 public:
161 virtual bool OnInit()
162 {
163 wxHtmlWindow::AddFilter(new wxHtmlFilterHTML);
164 wxHtmlWindow::AddFilter(new wxHtmlFilterImage);
165 return TRUE;
166 }
167 virtual void OnExit() {}
168 };
169
170 IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterModule, wxModule)
171
172 #endif