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