| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: htmlfilt.cpp |
| 3 | // Purpose: wxHtmlFilter - input filter for translating into HTML format |
| 4 | // Author: Vaclav Slavik |
| 5 | // RCS-ID: $Id$ |
| 6 | // Copyright: (c) 1999 Vaclav Slavik |
| 7 | // Licence: wxWindows licence |
| 8 | ///////////////////////////////////////////////////////////////////////////// |
| 9 | |
| 10 | |
| 11 | #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) |
| 12 | #pragma implementation "htmlfilt.h" |
| 13 | #endif |
| 14 | |
| 15 | #include "wx/wxprec.h" |
| 16 | |
| 17 | #include "wx/defs.h" |
| 18 | #if wxUSE_HTML && wxUSE_STREAMS |
| 19 | |
| 20 | #ifdef __BORLANDC__ |
| 21 | #pragma hdrstop |
| 22 | #endif |
| 23 | |
| 24 | #ifndef WXPRECOMP |
| 25 | #include "wx/log.h" |
| 26 | #include "wx/intl.h" |
| 27 | #endif |
| 28 | |
| 29 | #include "wx/strconv.h" |
| 30 | #include "wx/html/htmlfilt.h" |
| 31 | #include "wx/html/htmlwin.h" |
| 32 | |
| 33 | // utility function: read a wxString from a wxInputStream |
| 34 | static void ReadString(wxString& str, wxInputStream* s, wxMBConv& conv) |
| 35 | { |
| 36 | size_t streamSize = s->GetSize(); |
| 37 | |
| 38 | if (streamSize == ~(size_t)0) |
| 39 | { |
| 40 | const size_t bufSize = 4095; |
| 41 | char buffer[bufSize+1]; |
| 42 | size_t lastRead; |
| 43 | |
| 44 | do |
| 45 | { |
| 46 | s->Read(buffer, bufSize); |
| 47 | lastRead = s->LastRead(); |
| 48 | buffer[lastRead] = 0; |
| 49 | str.Append(wxString(buffer, conv)); |
| 50 | } |
| 51 | while (lastRead == bufSize); |
| 52 | } |
| 53 | else |
| 54 | { |
| 55 | char* src = new char[streamSize+1]; |
| 56 | s->Read(src, streamSize); |
| 57 | src[streamSize] = 0; |
| 58 | str = wxString(src, conv); |
| 59 | delete[] src; |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | /* |
| 64 | |
| 65 | There is code for several default filters: |
| 66 | |
| 67 | */ |
| 68 | |
| 69 | IMPLEMENT_ABSTRACT_CLASS(wxHtmlFilter, wxObject) |
| 70 | |
| 71 | //-------------------------------------------------------------------------------- |
| 72 | // wxHtmlFilterPlainText |
| 73 | // filter for text/plain or uknown |
| 74 | //-------------------------------------------------------------------------------- |
| 75 | |
| 76 | IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterPlainText, wxHtmlFilter) |
| 77 | |
| 78 | bool wxHtmlFilterPlainText::CanRead(const wxFSFile& WXUNUSED(file)) const |
| 79 | { |
| 80 | return true; |
| 81 | } |
| 82 | |
| 83 | |
| 84 | |
| 85 | wxString wxHtmlFilterPlainText::ReadFile(const wxFSFile& file) const |
| 86 | { |
| 87 | wxInputStream *s = file.GetStream(); |
| 88 | wxString doc, doc2; |
| 89 | |
| 90 | if (s == NULL) return wxEmptyString; |
| 91 | ReadString(doc, s, wxConvISO8859_1); |
| 92 | |
| 93 | doc.Replace(wxT("&"), wxT("&"), true); |
| 94 | doc.Replace(wxT("<"), wxT("<"), true); |
| 95 | doc.Replace(wxT(">"), wxT(">"), true); |
| 96 | doc2 = wxT("<HTML><BODY><PRE>\n") + doc + wxT("\n</PRE></BODY></HTML>"); |
| 97 | return doc2; |
| 98 | } |
| 99 | |
| 100 | |
| 101 | |
| 102 | |
| 103 | |
| 104 | //-------------------------------------------------------------------------------- |
| 105 | // wxHtmlFilterImage |
| 106 | // filter for image/* |
| 107 | //-------------------------------------------------------------------------------- |
| 108 | |
| 109 | class wxHtmlFilterImage : public wxHtmlFilter |
| 110 | { |
| 111 | DECLARE_DYNAMIC_CLASS(wxHtmlFilterImage) |
| 112 | |
| 113 | public: |
| 114 | virtual bool CanRead(const wxFSFile& file) const; |
| 115 | virtual wxString ReadFile(const wxFSFile& file) const; |
| 116 | }; |
| 117 | |
| 118 | IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterImage, wxHtmlFilter) |
| 119 | |
| 120 | |
| 121 | |
| 122 | bool wxHtmlFilterImage::CanRead(const wxFSFile& file) const |
| 123 | { |
| 124 | return (file.GetMimeType().Left(6) == wxT("image/")); |
| 125 | } |
| 126 | |
| 127 | |
| 128 | |
| 129 | wxString wxHtmlFilterImage::ReadFile(const wxFSFile& file) const |
| 130 | { |
| 131 | wxString res = wxT("<HTML><BODY><IMG SRC=\"") + file.GetLocation() + wxT("\"></BODY></HTML>"); |
| 132 | return res; |
| 133 | } |
| 134 | |
| 135 | |
| 136 | |
| 137 | |
| 138 | //-------------------------------------------------------------------------------- |
| 139 | // wxHtmlFilterHTML |
| 140 | // filter for text/html |
| 141 | //-------------------------------------------------------------------------------- |
| 142 | |
| 143 | |
| 144 | IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterHTML, wxHtmlFilter) |
| 145 | |
| 146 | bool wxHtmlFilterHTML::CanRead(const wxFSFile& file) const |
| 147 | { |
| 148 | // return (file.GetMimeType() == "text/html"); |
| 149 | // This is true in most case but some page can return: |
| 150 | // "text/html; char-encoding=...." |
| 151 | // So we use Find instead |
| 152 | return (file.GetMimeType().Find(wxT("text/html")) == 0); |
| 153 | } |
| 154 | |
| 155 | |
| 156 | |
| 157 | wxString wxHtmlFilterHTML::ReadFile(const wxFSFile& file) const |
| 158 | { |
| 159 | wxInputStream *s = file.GetStream(); |
| 160 | wxString doc; |
| 161 | |
| 162 | if (s == NULL) |
| 163 | { |
| 164 | wxLogError(_("Cannot open HTML document: %s"), file.GetLocation().c_str()); |
| 165 | return wxEmptyString; |
| 166 | } |
| 167 | |
| 168 | // NB: We convert input file to wchar_t here in Unicode mode, based on |
| 169 | // either Content-Type header or <meta> tags. In ANSI mode, we don't |
| 170 | // do it as it is done by wxHtmlParser (for this reason, we add <meta> |
| 171 | // tag if we used Content-Type header). |
| 172 | #if wxUSE_UNICODE |
| 173 | int charsetPos; |
| 174 | if ((charsetPos = file.GetMimeType().Find(_T("; charset="))) != wxNOT_FOUND) |
| 175 | { |
| 176 | wxString charset = file.GetMimeType().Mid(charsetPos + 10); |
| 177 | wxCSConv conv(charset); |
| 178 | ReadString(doc, s, conv); |
| 179 | } |
| 180 | else |
| 181 | { |
| 182 | wxString tmpdoc; |
| 183 | ReadString(tmpdoc, s, wxConvISO8859_1); |
| 184 | wxString charset = wxHtmlParser::ExtractCharsetInformation(tmpdoc); |
| 185 | if (charset.empty()) |
| 186 | doc = tmpdoc; |
| 187 | else |
| 188 | { |
| 189 | wxCSConv conv(charset); |
| 190 | doc = wxString(tmpdoc.mb_str(wxConvISO8859_1), conv); |
| 191 | } |
| 192 | } |
| 193 | #else // !wxUSE_UNICODE |
| 194 | ReadString(doc, s, wxConvLibc); |
| 195 | // add meta tag if we obtained this through http: |
| 196 | if (!file.GetMimeType().empty()) |
| 197 | { |
| 198 | wxString hdr; |
| 199 | wxString mime = file.GetMimeType(); |
| 200 | hdr.Printf(_T("<meta http-equiv=\"Content-Type\" content=\"%s\">"), mime.c_str()); |
| 201 | return hdr+doc; |
| 202 | } |
| 203 | #endif |
| 204 | |
| 205 | return doc; |
| 206 | } |
| 207 | |
| 208 | |
| 209 | |
| 210 | |
| 211 | ///// Module: |
| 212 | |
| 213 | class wxHtmlFilterModule : public wxModule |
| 214 | { |
| 215 | DECLARE_DYNAMIC_CLASS(wxHtmlFilterModule) |
| 216 | |
| 217 | public: |
| 218 | virtual bool OnInit() |
| 219 | { |
| 220 | wxHtmlWindow::AddFilter(new wxHtmlFilterHTML); |
| 221 | wxHtmlWindow::AddFilter(new wxHtmlFilterImage); |
| 222 | return true; |
| 223 | } |
| 224 | virtual void OnExit() {} |
| 225 | }; |
| 226 | |
| 227 | IMPLEMENT_DYNAMIC_CLASS(wxHtmlFilterModule, wxModule) |
| 228 | |
| 229 | #endif |