src/xrc/xmlwrite.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        xmlwrite.cpp
   3 // Purpose:     wxXmlDocument - XML text writer
   4 // Author:      Vaclav Slavik
   5 // Created:     2001/04/30
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2001 Vaclav Slavik
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #ifdef __GNUG__
  12 // nothing - already in xml.cpp
  13 #endif
  14
  15 // For compilers that support precompilation, includes "wx.h".
  16 #include "wx/wxprec.h"
  17
  18 #ifdef __BORLANDC__
  19     #pragma hdrstop
  20 #endif
  21
  22 #include "wx/wfstream.h"
  23 #include "wx/intl.h"
  24 #include "wx/log.h"
  25 #include "wx/strconv.h"
  26 #include "wx/xrc/xml.h"
  27 #include "wx/xrc/xmlio.h"
  28
  29 // write string to output:
  30 inline static void OutputString(wxOutputStream& stream, const wxString& str,
  31                                 wxMBConv *convMem, wxMBConv *convFile)
  32 {
  33     if (str.IsEmpty()) return;
  34 #if wxUSE_UNICODE
  35     const wxW2MBbuf *buf = str.mb_str(convFile ? *convFile : wxConvUTF8);
  36     stream.Write((const char*)buf, strlen((const char*)buf));
  37 #else
  38     if ( convFile == NULL )
  39         stream.Write(str.mb_str(), str.Len());
  40     else
  41     {
  42         wxString str2(str.wc_str(*convMem), *convFile);
  43         stream.Write(str2.mb_str(), str2.Len());
  44     }
  45 #endif
  46 }
  47
  48 // Same as above, but create entities first.
  49 // Translates '<' to "&lt;", '>' to "&gt;" and '&' to "&amp;"
  50 static void OutputStringEnt(wxOutputStream& stream, const wxString& str,
  51                             wxMBConv *convMem, wxMBConv *convFile)
  52 {
  53     wxString buf;
  54     size_t i, last, len;
  55     wxChar c;
  56
  57     len = str.Len();
  58     last = 0;
  59     for (i = 0; i < len; i++)
  60     {
  61         c = str.GetChar(i);
  62         if (c == wxT('<') || c == wxT('>') ||
  63             (c == wxT('&') && str.Mid(i+1, 4) != wxT("amp;")))
  64         {
  65             OutputString(stream, str.Mid(last, i - last), convMem, convFile);
  66             switch (c)
  67             {
  68                 case wxT('<'):
  69                     OutputString(stream, wxT("&lt;"), NULL, NULL);
  70                     break;
  71                 case wxT('>'):
  72                     OutputString(stream, wxT("&gt;"), NULL, NULL);
  73                     break;
  74                 case wxT('&'):
  75                     OutputString(stream, wxT("&amp;"), NULL, NULL);
  76                     break;
  77                 default: break;
  78             }
  79             last = i + 1;
  80         }
  81     }
  82     OutputString(stream, str.Mid(last, i - last), convMem, convFile);
  83 }
  84
  85 inline static void OutputIndentation(wxOutputStream& stream, int indent)
  86 {
  87     wxString str = wxT("\n");
  88     for (int i = 0; i < indent; i++)
  89         str << wxT(' ') << wxT(' ');
  90     OutputString(stream, str, NULL, NULL);
  91 }
  92
  93 static void OutputNode(wxOutputStream& stream, wxXmlNode *node, int indent,
  94                        wxMBConv *convMem, wxMBConv *convFile)
  95 {
  96     wxXmlNode *n, *prev;
  97     wxXmlProperty *prop;
  98
  99     switch (node->GetType())
 100     {
 101         case wxXML_TEXT_NODE:
 102             OutputStringEnt(stream, node->GetContent(), convMem, convFile);
 103             break;
 104
 105         case wxXML_ELEMENT_NODE:
 106             OutputString(stream, wxT("<"), NULL, NULL);
 107             OutputString(stream, node->GetName(), NULL, NULL);
 108
 109             prop = node->GetProperties();
 110             while (prop)
 111             {
 112                 OutputString(stream, wxT(" ") + prop->GetName() +
 113                              wxT("=\"") + prop->GetValue() + wxT("\""),
 114                              NULL, NULL);
 115                 // FIXME - what if prop contains '"'?
 116                 prop = prop->GetNext();
 117             }
 118
 119             if (node->GetChildren())
 120             {
 121                 OutputString(stream, wxT(">"), NULL, NULL);
 122                 prev = NULL;
 123                 n = node->GetChildren();
 124                 while (n)
 125                 {
 126                     if (n && n->GetType() != wxXML_TEXT_NODE)
 127                         OutputIndentation(stream, indent + 1);
 128                     OutputNode(stream, n, indent + 1, convMem, convFile);
 129                     prev = n;
 130                     n = n->GetNext();
 131                 }
 132                 if (prev && prev->GetType() != wxXML_TEXT_NODE)
 133                     OutputIndentation(stream, indent);
 134                 OutputString(stream, wxT("</"), NULL, NULL);
 135                 OutputString(stream, node->GetName(), NULL, NULL);
 136                 OutputString(stream, wxT(">"), NULL, NULL);
 137             }
 138             else
 139                 OutputString(stream, wxT("/>"), NULL, NULL);
 140             break;
 141
 142         case wxXML_COMMENT_NODE:
 143             OutputString(stream, wxT("<!--"), NULL, NULL);
 144             OutputString(stream, node->GetContent(), convMem, convFile);
 145             OutputString(stream, wxT("-->"), NULL, NULL);
 146             break;
 147
 148         default:
 149             wxFAIL_MSG(wxT("unsupported node type"));
 150     }
 151 }
 152
 153 bool wxXmlIOHandlerWriter::Save(wxOutputStream& stream, const wxXmlDocument& doc)
 154 {
 155     if (!doc.IsOk())
 156         return FALSE;
 157
 158     wxString s;
 159
 160     wxMBConv *convMem = NULL, *convFile = NULL;
 161 #if wxUSE_UNICODE
 162     convFile = new wxCSConv(doc.GetFileEncoding());
 163 #else
 164     if ( doc.GetFileEncoding() != doc.GetEncoding() )
 165     {
 166         convFile = new wxCSConv(doc.GetFileEncoding());
 167         convMem = new wxCSConv(doc.GetEncoding());
 168     }
 169 #endif
 170
 171     s.Printf(wxT("<?xml version=\"%s\" encoding=\"%s\"?>\n"),
 172              doc.GetVersion().c_str(), doc.GetFileEncoding().c_str());
 173     OutputString(stream, s, NULL, NULL);
 174
 175     OutputNode(stream, doc.GetRoot(), 0, convMem, convFile);
 176     OutputString(stream, wxT("\n"), NULL, NULL);
 177
 178     if ( convFile )
 179         delete convFile;
 180     if ( convMem )
 181         delete convMem;
 182
 183     return TRUE;
 184 }