include/wx/html/winpars.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        winpars.h
   3 // Purpose:     wxHtmlWinParser class (parser to be used with wxHtmlWindow)
   4 // Author:      Vaclav Slavik
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1999 Vaclav Slavik
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifndef _WX_WINPARS_H_
  11 #define _WX_WINPARS_H_
  12
  13 #include "wx/defs.h"
  14 #if wxUSE_HTML
  15
  16 #include "wx/module.h"
  17 #include "wx/font.h"
  18 #include "wx/html/htmlpars.h"
  19 #include "wx/html/htmlcell.h"
  20 #include "wx/encconv.h"
  21
  22 class WXDLLIMPEXP_HTML wxHtmlWindow;
  23 class WXDLLIMPEXP_HTML wxHtmlWindowInterface;
  24 class WXDLLIMPEXP_HTML wxHtmlWinParser;
  25 class WXDLLIMPEXP_HTML wxHtmlWinTagHandler;
  26 class WXDLLIMPEXP_HTML wxHtmlTagsModule;
  27
  28
  29 //--------------------------------------------------------------------------------
  30 // wxHtmlWinParser
  31 //                  This class is derived from wxHtmlParser and its mail goal
  32 //                  is to parse HTML input so that it can be displayed in
  33 //                  wxHtmlWindow. It uses special wxHtmlWinTagHandler.
  34 //--------------------------------------------------------------------------------
  35
  36 class WXDLLIMPEXP_HTML wxHtmlWinParser : public wxHtmlParser
  37 {
  38     DECLARE_ABSTRACT_CLASS(wxHtmlWinParser)
  39     friend class wxHtmlWindow;
  40
  41 public:
  42     wxHtmlWinParser(wxHtmlWindowInterface *wndIface = NULL);
  43
  44     virtual ~wxHtmlWinParser();
  45
  46     virtual void InitParser(const wxString& source);
  47     virtual void DoneParser();
  48     virtual wxObject* GetProduct();
  49
  50     virtual wxFSFile *OpenURL(wxHtmlURLType type, const wxString& url) const;
  51
  52     // Set's the DC used for parsing. If SetDC() is not called,
  53     // parsing won't proceed
  54     virtual void SetDC(wxDC *dc, double pixel_scale = 1.0)
  55         { m_DC = dc; m_PixelScale = pixel_scale; }
  56
  57     wxDC *GetDC() {return m_DC;}
  58     double GetPixelScale() {return m_PixelScale;}
  59     int GetCharHeight() const {return m_CharHeight;}
  60     int GetCharWidth() const {return m_CharWidth;}
  61
  62     // NOTE : these functions do _not_ return _actual_
  63     // height/width. They return h/w of default font
  64     // for this DC. If you want actual values, call
  65     // GetDC()->GetChar...()
  66
  67     // returns interface to the rendering window
  68     wxHtmlWindowInterface *GetWindowInterface() {return m_windowInterface;}
  69 #if WXWIN_COMPATIBILITY_2_6
  70     // deprecated, use GetWindowInterface()->GetHTMLWindow() instead
  71     wxDEPRECATED( wxHtmlWindow *GetWindow() );
  72 #endif
  73
  74     // Sets fonts to be used when displaying HTML page. (if size null then default sizes used).
  75     void SetFonts(const wxString& normal_face, const wxString& fixed_face, const int *sizes = NULL);
  76
  77     // Sets font sizes to be relative to the given size or the system
  78     // default size; use either specified or default font
  79     void SetStandardFonts(int size = -1,
  80                           const wxString& normal_face = wxEmptyString,
  81                           const wxString& fixed_face = wxEmptyString);
  82
  83     // Adds tags module. see wxHtmlTagsModule for details.
  84     static void AddModule(wxHtmlTagsModule *module);
  85
  86     static void RemoveModule(wxHtmlTagsModule *module);
  87
  88     // parsing-related methods. These methods are called by tag handlers:
  89
  90     // Returns pointer to actual container. Common use in tag handler is :
  91     // m_WParser->GetContainer()->InsertCell(new ...);
  92     wxHtmlContainerCell *GetContainer() const {return m_Container;}
  93
  94     // opens new container. This container is sub-container of opened
  95     // container. Sets GetContainer to newly created container
  96     // and returns it.
  97     wxHtmlContainerCell *OpenContainer();
  98
  99     // works like OpenContainer except that new container is not created
 100     // but c is used. You can use this to directly set actual container
 101     wxHtmlContainerCell *SetContainer(wxHtmlContainerCell *c);
 102
 103     // closes the container and sets actual Container to upper-level
 104     // container
 105     wxHtmlContainerCell *CloseContainer();
 106
 107     int GetFontSize() const {return m_FontSize;}
 108     void SetFontSize(int s);
 109     int GetFontBold() const {return m_FontBold;}
 110     void SetFontBold(int x) {m_FontBold = x;}
 111     int GetFontItalic() const {return m_FontItalic;}
 112     void SetFontItalic(int x) {m_FontItalic = x;}
 113     int GetFontUnderlined() const {return m_FontUnderlined;}
 114     void SetFontUnderlined(int x) {m_FontUnderlined = x;}
 115     int GetFontFixed() const {return m_FontFixed;}
 116     void SetFontFixed(int x) {m_FontFixed = x;}
 117     wxString GetFontFace() const {return GetFontFixed() ? m_FontFaceFixed : m_FontFaceNormal;}
 118     void SetFontFace(const wxString& face);
 119
 120     int GetAlign() const {return m_Align;}
 121     void SetAlign(int a) {m_Align = a;}
 122
 123     wxHtmlScriptMode GetScriptMode() const { return m_ScriptMode; }
 124     void SetScriptMode(wxHtmlScriptMode mode) { m_ScriptMode = mode; }
 125     long GetScriptBaseline() const { return m_ScriptBaseline; }
 126     void SetScriptBaseline(long base) { m_ScriptBaseline = base; }
 127
 128     const wxColour& GetLinkColor() const { return m_LinkColor; }
 129     void SetLinkColor(const wxColour& clr) { m_LinkColor = clr; }
 130     const wxColour& GetActualColor() const { return m_ActualColor; }
 131     void SetActualColor(const wxColour& clr) { m_ActualColor = clr ;}
 132     const wxHtmlLinkInfo& GetLink() const { return m_Link; }
 133     void SetLink(const wxHtmlLinkInfo& link);
 134
 135     // applies current parser state (link, sub/supscript, ...) to given cell
 136     void ApplyStateToCell(wxHtmlCell *cell);
 137
 138 #if !wxUSE_UNICODE
 139     void SetInputEncoding(wxFontEncoding enc);
 140     wxFontEncoding GetInputEncoding() const { return m_InputEnc; }
 141     wxFontEncoding GetOutputEncoding() const { return m_OutputEnc; }
 142     wxEncodingConverter *GetEncodingConverter() const { return m_EncConv; }
 143 #endif
 144
 145     // creates font depending on m_Font* members.
 146     virtual wxFont* CreateCurrentFont();
 147
 148 protected:
 149     virtual void AddText(const wxString& txt);
 150
 151 private:
 152     void DoAddText(wxChar *temp, int& templen, wxChar nbsp);
 153
 154     bool m_tmpLastWasSpace;
 155     wxChar *m_tmpStrBuf;
 156     size_t  m_tmpStrBufSize;
 157         // temporary variables used by AddText
 158     wxHtmlWindowInterface *m_windowInterface;
 159             // window we're parsing for
 160     double m_PixelScale;
 161     wxDC *m_DC;
 162             // Device Context we're parsing for
 163     static wxList m_Modules;
 164             // list of tags modules (see wxHtmlTagsModule for details)
 165             // This list is used to initialize m_Handlers member.
 166
 167     wxHtmlContainerCell *m_Container;
 168             // current container. See Open/CloseContainer for details.
 169
 170     int m_FontBold, m_FontItalic, m_FontUnderlined, m_FontFixed; // this is not true,false but 1,0, we need it for indexing
 171     int m_FontSize; /* -2 to +4,  0 is default */
 172     wxColour m_LinkColor;
 173     wxColour m_ActualColor;
 174             // basic font parameters.
 175     wxHtmlLinkInfo m_Link;
 176             // actual hypertext link or empty string
 177     bool m_UseLink;
 178             // true if m_Link is not empty
 179     long m_CharHeight, m_CharWidth;
 180             // average height of normal-sized text
 181     int m_Align;
 182             // actual alignment
 183     wxHtmlScriptMode m_ScriptMode;
 184             // current script mode (sub/sup/normal)
 185     long m_ScriptBaseline;
 186             // current sub/supscript base
 187
 188     wxFont* m_FontsTable[2][2][2][2][7];
 189     wxString m_FontsFacesTable[2][2][2][2][7];
 190 #if !wxUSE_UNICODE
 191     wxFontEncoding m_FontsEncTable[2][2][2][2][7];
 192 #endif
 193             // table of loaded fonts. 1st four indexes are 0 or 1, depending on on/off
 194             // state of these flags (from left to right):
 195             // [bold][italic][underlined][fixed_size]
 196             // last index is font size : from 0 to 6 (remapped from html sizes 1 to 7)
 197             // Note : this table covers all possible combinations of fonts, but not
 198             // all of them are used, so many items in table are usually NULL.
 199     int m_FontsSizes[7];
 200     wxString m_FontFaceFixed, m_FontFaceNormal;
 201             // html font sizes and faces of fixed and proportional fonts
 202
 203 #if !wxUSE_UNICODE
 204     wxFontEncoding m_InputEnc, m_OutputEnc;
 205             // I/O font encodings
 206     wxEncodingConverter *m_EncConv;
 207 #endif
 208
 209     wxHtmlWordCell *m_lastWordCell;
 210
 211     DECLARE_NO_COPY_CLASS(wxHtmlWinParser)
 212 };
 213
 214
 215
 216
 217
 218
 219 //-----------------------------------------------------------------------------
 220 // wxHtmlWinTagHandler
 221 //                  This is basicly wxHtmlTagHandler except
 222 //                  it is extended with protected member m_Parser pointing to
 223 //                  the wxHtmlWinParser object
 224 //-----------------------------------------------------------------------------
 225
 226 class WXDLLIMPEXP_HTML wxHtmlWinTagHandler : public wxHtmlTagHandler
 227 {
 228     DECLARE_ABSTRACT_CLASS(wxHtmlWinTagHandler)
 229
 230 public:
 231     wxHtmlWinTagHandler() : wxHtmlTagHandler() {}
 232
 233     virtual void SetParser(wxHtmlParser *parser) {wxHtmlTagHandler::SetParser(parser); m_WParser = (wxHtmlWinParser*) parser;}
 234
 235 protected:
 236     wxHtmlWinParser *m_WParser; // same as m_Parser, but overcasted
 237
 238     DECLARE_NO_COPY_CLASS(wxHtmlWinTagHandler)
 239 };
 240
 241
 242
 243
 244
 245
 246 //----------------------------------------------------------------------------
 247 // wxHtmlTagsModule
 248 //                  This is basic of dynamic tag handlers binding.
 249 //                  The class provides methods for filling parser's handlers
 250 //                  hash table.
 251 //                  (See documentation for details)
 252 //----------------------------------------------------------------------------
 253
 254 class WXDLLIMPEXP_HTML wxHtmlTagsModule : public wxModule
 255 {
 256     DECLARE_DYNAMIC_CLASS(wxHtmlTagsModule)
 257
 258 public:
 259     wxHtmlTagsModule() : wxModule() {}
 260
 261     virtual bool OnInit();
 262     virtual void OnExit();
 263
 264     // This is called by wxHtmlWinParser.
 265     // The method must simply call parser->AddTagHandler(new
 266     // <handler_class_name>); for each handler
 267     virtual void FillHandlersTable(wxHtmlWinParser * WXUNUSED(parser)) { }
 268 };
 269
 270
 271 #endif
 272
 273 #endif // _WX_WINPARS_H_