src/richtext/richtexthtml.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        richtext/richtexthtml.cpp
   3 // Purpose:     HTML I/O for wxRichTextCtrl
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     2005-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16   #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_RICHTEXT
  20
  21 #include "wx/richtext/richtexthtml.h"
  22
  23 #ifndef WX_PRECOMP
  24   #include "wx/wx.h"
  25 #endif
  26
  27 #include "wx/filename.h"
  28 #include "wx/wfstream.h"
  29 #include "wx/txtstrm.h"
  30
  31 IMPLEMENT_DYNAMIC_CLASS(wxRichTextHTMLHandler, wxRichTextFileHandler)
  32
  33 /// Can we handle this filename (if using files)? By default, checks the extension.
  34 bool wxRichTextHTMLHandler::CanHandle(const wxString& filename) const
  35 {
  36     wxString path, file, ext;
  37     wxSplitPath(filename, & path, & file, & ext);
  38
  39     return (ext.Lower() == wxT("html") || ext.Lower() == wxT("htm"));
  40 }
  41
  42
  43 #if wxUSE_STREAMS
  44 bool wxRichTextHTMLHandler::DoLoadFile(wxRichTextBuffer *WXUNUSED(buffer), wxInputStream& WXUNUSED(stream))
  45 {
  46     return false;
  47 }
  48
  49 /*
  50  * We need to output only _changes_ in character formatting.
  51  */
  52
  53 bool wxRichTextHTMLHandler::DoSaveFile(wxRichTextBuffer *buffer, wxOutputStream& stream)
  54 {
  55     buffer->Defragment();
  56
  57     wxTextOutputStream str(stream);
  58
  59     wxTextAttrEx currentParaStyle = buffer->GetAttributes();
  60     wxTextAttrEx currentCharStyle = buffer->GetAttributes();
  61
  62     str << wxT("<html><head></head><body>\n");
  63
  64     wxRichTextObjectList::compatibility_iterator node = buffer->GetChildren().GetFirst();
  65     while (node)
  66     {
  67         wxRichTextParagraph* para = wxDynamicCast(node->GetData(), wxRichTextParagraph);
  68         wxASSERT (para != NULL);
  69
  70         if (para)
  71         {
  72             OutputParagraphFormatting(currentParaStyle, para->GetAttributes(), stream, true);
  73
  74             wxRichTextObjectList::compatibility_iterator node2 = para->GetChildren().GetFirst();
  75             while (node2)
  76             {
  77                 wxRichTextObject* obj = node2->GetData();
  78                 wxRichTextPlainText* textObj = wxDynamicCast(obj, wxRichTextPlainText);
  79                 if (textObj && !textObj->IsEmpty())
  80                 {
  81                     OutputCharacterFormatting(currentCharStyle, obj->GetAttributes(), stream, true);
  82
  83                     str << textObj->GetText();
  84
  85                     OutputCharacterFormatting(currentCharStyle, obj->GetAttributes(), stream, false);
  86                 }
  87
  88                 node2 = node2->GetNext();
  89             }
  90
  91             OutputParagraphFormatting(currentParaStyle, para->GetAttributes(), stream, false);
  92
  93             str << wxT("<P>\n");
  94         }
  95
  96         node = node->GetNext();
  97     }
  98
  99     str << wxT("</body></html>\n");
 100
 101     return true;
 102 }
 103
 104 /// Output character formatting
 105 void wxRichTextHTMLHandler::OutputCharacterFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxOutputStream& stream, bool start)
 106 {
 107     wxTextOutputStream str(stream);
 108
 109     bool isBold = false;
 110     bool isItalic = false;
 111     bool isUnderline = false;
 112     wxString faceName;
 113
 114     if (thisStyle.GetFont().Ok())
 115     {
 116         if (thisStyle.GetFont().GetWeight() == wxBOLD)
 117             isBold = true;
 118         if (thisStyle.GetFont().GetStyle() == wxITALIC)
 119             isItalic = true;
 120         if (thisStyle.GetFont().GetUnderlined())
 121             isUnderline = true;
 122
 123         faceName = thisStyle.GetFont().GetFaceName();
 124     }
 125
 126     if (start)
 127     {
 128         if (isBold)
 129             str << wxT("<b>");
 130         if (isItalic)
 131             str << wxT("<i>");
 132         if (isUnderline)
 133             str << wxT("<u>");
 134     }
 135     else
 136     {
 137         if (isUnderline)
 138             str << wxT("</u>");
 139         if (isItalic)
 140             str << wxT("</i>");
 141         if (isBold)
 142             str << wxT("</b>");
 143     }
 144 }
 145
 146 /// Output paragraph formatting
 147 void wxRichTextHTMLHandler::OutputParagraphFormatting(const wxTextAttrEx& WXUNUSED(currentStyle), const wxTextAttrEx& thisStyle, wxOutputStream& stream, bool start)
 148 {
 149     // TODO: lists, indentation (using tables), fonts, right-align, ...
 150
 151     wxTextOutputStream str(stream);
 152     bool isCentered = false;
 153
 154     if (thisStyle.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
 155     {
 156         isCentered = true;
 157     }
 158
 159     if (start)
 160     {
 161         if (isCentered)
 162             str << wxT("<center>");
 163     }
 164     else
 165     {
 166         if (isCentered)
 167             str << wxT("</center>");
 168     }
 169 }
 170
 171 #endif
 172     // wxUSE_STREAMS
 173
 174 #endif
 175     // wxUSE_RICHTEXT
 176