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_FWD_HTML wxHtmlWindow;
  23 class WXDLLIMPEXP_FWD_HTML wxHtmlWindowInterface;
  24 class WXDLLIMPEXP_FWD_HTML wxHtmlWinParser;
  25 class WXDLLIMPEXP_FWD_HTML wxHtmlWinTagHandler;
  26 class WXDLLIMPEXP_FWD_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     enum WhitespaceMode
 149     {
 150         Whitespace_Normal,  // normal mode, collapse whitespace
 151         Whitespace_Pre      // inside <pre>, keep whitespace as-is
 152     };
 153
 154     // change the current whitespace handling mode
 155     void SetWhitespaceMode(WhitespaceMode mode) { m_whitespaceMode = mode; }
 156     WhitespaceMode GetWhitespaceMode() const { return m_whitespaceMode; }
 157
 158 protected:
 159     virtual void AddText(const wxString& txt);
 160
 161 private:
 162     void FlushWordBuf(wxChar *temp, int& len);
 163     void AddWord(wxHtmlWordCell *word);
 164     void AddWord(const wxString& word)
 165         { AddWord(new wxHtmlWordCell(word, *(GetDC()))); }
 166     void AddPreBlock(const wxString& text);
 167
 168     bool m_tmpLastWasSpace;
 169     wxChar *m_tmpStrBuf;
 170     size_t  m_tmpStrBufSize;
 171         // temporary variables used by AddText
 172     wxHtmlWindowInterface *m_windowInterface;
 173             // window we're parsing for
 174     double m_PixelScale;
 175     wxDC *m_DC;
 176             // Device Context we're parsing for
 177     static wxList m_Modules;
 178             // list of tags modules (see wxHtmlTagsModule for details)
 179             // This list is used to initialize m_Handlers member.
 180
 181     wxHtmlContainerCell *m_Container;
 182             // current container. See Open/CloseContainer for details.
 183
 184     int m_FontBold, m_FontItalic, m_FontUnderlined, m_FontFixed; // this is not true,false but 1,0, we need it for indexing
 185     int m_FontSize; /* -2 to +4,  0 is default */
 186     wxColour m_LinkColor;
 187     wxColour m_ActualColor;
 188             // basic font parameters.
 189     wxHtmlLinkInfo m_Link;
 190             // actual hypertext link or empty string
 191     bool m_UseLink;
 192             // true if m_Link is not empty
 193     long m_CharHeight, m_CharWidth;
 194             // average height of normal-sized text
 195     int m_Align;
 196             // actual alignment
 197     wxHtmlScriptMode m_ScriptMode;
 198             // current script mode (sub/sup/normal)
 199     long m_ScriptBaseline;
 200             // current sub/supscript base
 201
 202     wxFont* m_FontsTable[2][2][2][2][7];
 203     wxString m_FontsFacesTable[2][2][2][2][7];
 204 #if !wxUSE_UNICODE
 205     wxFontEncoding m_FontsEncTable[2][2][2][2][7];
 206 #endif
 207             // table of loaded fonts. 1st four indexes are 0 or 1, depending on on/off
 208             // state of these flags (from left to right):
 209             // [bold][italic][underlined][fixed_size]
 210             // last index is font size : from 0 to 6 (remapped from html sizes 1 to 7)
 211             // Note : this table covers all possible combinations of fonts, but not
 212             // all of them are used, so many items in table are usually NULL.
 213     int m_FontsSizes[7];
 214     wxString m_FontFaceFixed, m_FontFaceNormal;
 215             // html font sizes and faces of fixed and proportional fonts
 216
 217 #if !wxUSE_UNICODE
 218     wxChar m_nbsp;
 219     wxFontEncoding m_InputEnc, m_OutputEnc;
 220             // I/O font encodings
 221     wxEncodingConverter *m_EncConv;
 222 #endif
 223
 224     // current whitespace handling mode
 225     WhitespaceMode m_whitespaceMode;
 226
 227     wxHtmlWordCell *m_lastWordCell;
 228
 229     // current position on line, in num. of characters; used to properly
 230     // expand TABs; only updated while inside <pre>
 231     int m_posColumn;
 232
 233     wxDECLARE_NO_COPY_CLASS(wxHtmlWinParser);
 234 };
 235
 236
 237
 238
 239
 240
 241 //-----------------------------------------------------------------------------
 242 // wxHtmlWinTagHandler
 243 //                  This is basicly wxHtmlTagHandler except
 244 //                  it is extended with protected member m_Parser pointing to
 245 //                  the wxHtmlWinParser object
 246 //-----------------------------------------------------------------------------
 247
 248 class WXDLLIMPEXP_HTML wxHtmlWinTagHandler : public wxHtmlTagHandler
 249 {
 250     DECLARE_ABSTRACT_CLASS(wxHtmlWinTagHandler)
 251
 252 public:
 253     wxHtmlWinTagHandler() : wxHtmlTagHandler() {}
 254
 255     virtual void SetParser(wxHtmlParser *parser) {wxHtmlTagHandler::SetParser(parser); m_WParser = (wxHtmlWinParser*) parser;}
 256
 257 protected:
 258     wxHtmlWinParser *m_WParser; // same as m_Parser, but overcasted
 259
 260     wxDECLARE_NO_COPY_CLASS(wxHtmlWinTagHandler);
 261 };
 262
 263
 264
 265
 266
 267
 268 //----------------------------------------------------------------------------
 269 // wxHtmlTagsModule
 270 //                  This is basic of dynamic tag handlers binding.
 271 //                  The class provides methods for filling parser's handlers
 272 //                  hash table.
 273 //                  (See documentation for details)
 274 //----------------------------------------------------------------------------
 275
 276 class WXDLLIMPEXP_HTML wxHtmlTagsModule : public wxModule
 277 {
 278     DECLARE_DYNAMIC_CLASS(wxHtmlTagsModule)
 279
 280 public:
 281     wxHtmlTagsModule() : wxModule() {}
 282
 283     virtual bool OnInit();
 284     virtual void OnExit();
 285
 286     // This is called by wxHtmlWinParser.
 287     // The method must simply call parser->AddTagHandler(new
 288     // <handler_class_name>); for each handler
 289     virtual void FillHandlersTable(wxHtmlWinParser * WXUNUSED(parser)) { }
 290 };
 291
 292
 293 #endif
 294
 295 #endif // _WX_WINPARS_H_