src/html/htmlfilter.cpp

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