interface/wx/richtext/richtextxml.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        richtext/richtextxml.h
   3 // Purpose:     interface of wxRichTextXMLHandler
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows license
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxRichTextXMLHandler
  11
  12     A handler for loading and saving content in an XML format specific
  13     to wxRichTextBuffer.
  14
  15     You can either add the handler to the buffer and load and save through
  16     the buffer or control API, or you can create an instance of the handler
  17     on the stack and call its functions directly.
  18
  19
  20     @section richtextxmlhandler_flags Handler flags
  21
  22     The following flags can be used with this handler, via the handler's SetFlags()
  23     function or the buffer or control's SetHandlerFlags() function:
  24
  25     - wxRICHTEXT_HANDLER_INCLUDE_STYLESHEET
  26       Include the style sheet in loading and saving operations.
  27
  28
  29     @library{wxrichtext}
  30     @category{richtext}
  31 */
  32 class wxRichTextXMLHandler : public wxRichTextFileHandler
  33 {
  34 public:
  35     /**
  36         Constructor.
  37     */
  38     wxRichTextXMLHandler(const wxString& name = wxT("XML"),
  39                          const wxString& ext = wxT("xml"),
  40                          int type = wxRICHTEXT_TYPE_XML);
  41
  42     /**
  43         Returns @true.
  44     */
  45     virtual bool CanLoad() const;
  46
  47     /**
  48         Returns @true.
  49     */
  50     virtual bool CanSave() const;
  51
  52     /**
  53         Creates XML code for a given character or paragraph style.
  54     */
  55     wxString CreateStyle(const wxTextAttr& attr, bool isPara = false);
  56
  57     /**
  58         Recursively exports an object to the stream.
  59     */
  60     bool ExportXML(wxOutputStream& stream, wxMBConv* convMem,
  61                    wxMBConv* convFile,
  62                    wxRichTextObject& obj,
  63                    int level);
  64
  65     /**
  66         Helper function: gets node context.
  67     */
  68     wxString GetNodeContent(wxXmlNode* node);
  69
  70     /**
  71         Helper function: gets a named parameter from the XML node.
  72     */
  73     wxXmlNode* GetParamNode(wxXmlNode* node, const wxString& param);
  74
  75     /**
  76         Helper function: gets a named parameter from the XML node.
  77     */
  78     wxString GetParamValue(wxXmlNode* node, const wxString& param);
  79
  80     /**
  81         Helper function: gets style parameters from the given XML node.
  82     */
  83     bool GetStyle(wxTextAttr& attr, wxXmlNode* node,
  84                   bool isPara = false);
  85
  86     /**
  87         Helper function: gets text from the node.
  88     */
  89     wxString GetText(wxXmlNode* node,
  90                      const wxString& param = wxEmptyString,
  91                      bool translate = false);
  92
  93     /**
  94         Helper function: returns @true if the node has the given parameter.
  95     */
  96     bool HasParam(wxXmlNode* node, const wxString& param);
  97
  98     /**
  99         Recursively imports an object.
 100     */
 101     bool ImportXML(wxRichTextBuffer* buffer, wxXmlNode* node);
 102
 103 protected:
 104
 105     /**
 106         Loads buffer context from the given stream.
 107     */
 108     virtual bool DoLoadFile(wxRichTextBuffer* buffer, wxInputStream& stream);
 109
 110     /**
 111         Saves buffer context to the given stream.
 112     */
 113     virtual bool DoSaveFile(wxRichTextBuffer* buffer, wxOutputStream& stream);
 114 };
 115