interface/richtext/richtexthtml.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        richtext/richtexthtml.h
   3 // Purpose:     interface of wxRichTextHTMLHandler
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows license
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxRichTextHTMLHandler
  11     @headerfile richtexthtml.h wx/richtext/richtexthtml.h
  12
  13     Handles HTML output (only) for wxRichTextCtrl content.
  14
  15     The most flexible way to use this class is to create a temporary object and call
  16     its functions directly, rather than use wxRichTextBuffer::SaveFile or
  17     wxRichTextCtrl::SaveFile.
  18
  19     Image handling requires a little extra work from the application, to choose an
  20     appropriate image format for the target HTML viewer and to clean up the
  21     temporary images
  22     later. If you are planning to load the HTML into a standard web browser, you can
  23     specify the handler flag wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_BASE64 (the default)
  24     and no extra work is required: the images will be written with the HTML.
  25
  26     However, if you want wxHTML compatibility, you will need to use
  27     wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY
  28     or wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES. In this case, you must either call
  29     wxRichTextHTMLHandler::DeleteTemporaryImages before
  30     the next load operation, or you must store the image
  31     locations and delete them yourself when appropriate. You can call
  32     wxRichTextHTMLHandler::GetTemporaryImageLocations to
  33     get the array of temporary image names.
  34
  35     @library{wxrichtext}
  36     @category{richtext}
  37 */
  38 class wxRichTextHTMLHandler : public wxRichTextFileHandler
  39 {
  40 public:
  41     /**
  42         ,  wxString&@e ext = wxT("html"), @b int@e type = wxRICHTEXT_TYPE_HTML)
  43         Constructor.
  44     */
  45     wxRichTextHTMLHandler() const;
  46
  47     /**
  48         Clears the image locations generated by the last operation.
  49     */
  50     void ClearTemporaryImageLocations();
  51
  52     //@{
  53     /**
  54         Delete the in-memory or temporary files generated by the last operation. This
  55         is a static
  56         function that can be used to delete the saved locations from an earlier
  57         operation,
  58         for example after the user has viewed the HTML file.
  59     */
  60     bool DeleteTemporaryImages();
  61     bool DeleteTemporaryImages(int flags,
  62                                const wxArrayString& imageLocations);
  63     //@}
  64
  65     /**
  66         Saves the buffer content to the HTML stream.
  67     */
  68     bool DoSaveFile(wxRichTextBuffer* buffer, wxOutputStream& stream);
  69
  70     /**
  71         Returns the mapping for converting point sizes to HTML font sizes.
  72     */
  73     wxArrayInt GetFontSizeMapping();
  74
  75     /**
  76         Returns the directory used to store temporary image files.
  77     */
  78     const wxString GetTempDir() const;
  79
  80     /**
  81         Returns the image locations for the last operation.
  82     */
  83     const wxArrayString GetTemporaryImageLocations() const;
  84
  85     /**
  86         Reset the file counter, in case, for example, the same names are required each
  87         time
  88     */
  89     void SetFileCounter(int counter);
  90
  91     /**
  92         Sets the mapping for converting point sizes to HTML font sizes.
  93         There should be 7 elements, one for each HTML font size, each element
  94         specifying the maximum point size for that
  95         HTML font size.
  96         For example:
  97     */
  98     void SetFontSizeMapping(const wxArrayInt& fontSizeMapping);
  99
 100     /**
 101         Sets the directory for storing temporary files. If empty, the system
 102         temporary directory will be used.
 103     */
 104     void SetTempDir(const wxString& tempDir);
 105
 106     /**
 107         Sets the list of image locations generated by the last operation.
 108     */
 109     void SetTemporaryImageLocations(const wxArrayString& locations);
 110 };
 111