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 "winpars.h"
  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 WXDLLEXPORT wxHtmlWinParser;
  28 class WXDLLEXPORT wxHtmlWinTagHandler;
  29 class WXDLLEXPORT 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     // Set's the DC used for parsing. If SetDC() is not called,
  51     // parsing won't proceed
  52     virtual void SetDC(wxDC *dc, double pixel_scale = 1.0)
  53         { m_DC = dc; m_PixelScale = pixel_scale; }
  54
  55     wxDC *GetDC() {return m_DC;}
  56     double GetPixelScale() {return m_PixelScale;}
  57     int GetCharHeight() const {return m_CharHeight;}
  58     int GetCharWidth() const {return m_CharWidth;}
  59
  60     // NOTE : these functions do _not_ return _actual_
  61     // height/width. They return h/w of default font
  62     // for this DC. If you want actual values, call
  63     // GetDC()->GetChar...()
  64
  65     // returns associated wxWindow
  66     wxWindow *GetWindow() {return m_Window;}
  67
  68     // sets fonts to be used when displaying HTML page.
  69     void SetFonts(wxString normal_face, wxString fixed_face, const int *sizes);
  70
  71     // Adds tags module. see wxHtmlTagsModule for details.
  72     static void AddModule(wxHtmlTagsModule *module);
  73
  74     static void RemoveModule(wxHtmlTagsModule *module);
  75
  76     // parsing-related methods. These methods are called by tag handlers:
  77
  78     // Returns pointer to actual container. Common use in tag handler is :
  79     // m_WParser->GetContainer()->InsertCell(new ...);
  80     wxHtmlContainerCell *GetContainer() const {return m_Container;}
  81
  82     // opens new container. This container is sub-container of opened
  83     // container. Sets GetContainer to newly created container
  84     // and returns it.
  85     wxHtmlContainerCell *OpenContainer();
  86
  87     // works like OpenContainer except that new container is not created
  88     // but c is used. You can use this to directly set actual container
  89     wxHtmlContainerCell *SetContainer(wxHtmlContainerCell *c);
  90
  91     // closes the container and sets actual Container to upper-level
  92     // container
  93     wxHtmlContainerCell *CloseContainer();
  94
  95     int GetFontSize() const {return m_FontSize;}
  96     void SetFontSize(int s);
  97     int GetFontBold() const {return m_FontBold;}
  98     void SetFontBold(int x) {m_FontBold = x;}
  99     int GetFontItalic() const {return m_FontItalic;}
 100     void SetFontItalic(int x) {m_FontItalic = x;}
 101     int GetFontUnderlined() const {return m_FontUnderlined;}
 102     void SetFontUnderlined(int x) {m_FontUnderlined = x;}
 103     int GetFontFixed() const {return m_FontFixed;}
 104     void SetFontFixed(int x) {m_FontFixed = x;}
 105     wxString GetFontFace() const {return GetFontFixed() ? m_FontFaceFixed : m_FontFaceNormal;}
 106     void SetFontFace(const wxString& face);
 107
 108     int GetAlign() const {return m_Align;}
 109     void SetAlign(int a) {m_Align = a;}
 110     const wxColour& GetLinkColor() const { return m_LinkColor; }
 111     void SetLinkColor(const wxColour& clr) { m_LinkColor = clr; }
 112     const wxColour& GetActualColor() const { return m_ActualColor; }
 113     void SetActualColor(const wxColour& clr) { m_ActualColor = clr ;}
 114     const wxHtmlLinkInfo& GetLink() const { return m_Link; }
 115     void SetLink(const wxHtmlLinkInfo& link);
 116
 117     void SetInputEncoding(wxFontEncoding enc);
 118     wxFontEncoding GetInputEncoding() const { return m_InputEnc; }
 119     wxFontEncoding GetOutputEncoding() const { return m_OutputEnc; }
 120     wxEncodingConverter *GetEncodingConverter() const { return m_EncConv; }
 121
 122     // creates font depending on m_Font* members.
 123     virtual wxFont* CreateCurrentFont();
 124
 125 protected:
 126     virtual void AddText(const wxChar* txt);
 127
 128 private:
 129     bool m_tmpLastWasSpace;
 130     wxChar *m_tmpStrBuf;
 131     size_t  m_tmpStrBufSize;
 132         // temporary variables used by AddText
 133     wxWindow *m_Window;
 134             // window we're parsing for
 135     double m_PixelScale;
 136     wxDC *m_DC;
 137             // Device Context we're parsing for
 138     static wxList m_Modules;
 139             // list of tags modules (see wxHtmlTagsModule for details)
 140             // This list is used to initialize m_Handlers member.
 141
 142     wxHtmlContainerCell *m_Container;
 143             // actual container. See Open/CloseContainer for details.
 144
 145     int m_FontBold, m_FontItalic, m_FontUnderlined, m_FontFixed; // this is not TRUE,FALSE but 1,0, we need it for indexing
 146     int m_FontSize; /* -2 to +4,  0 is default */
 147     wxColour m_LinkColor;
 148     wxColour m_ActualColor;
 149             // basic font parameters.
 150     wxHtmlLinkInfo m_Link;
 151             // actual hypertext link or empty string
 152     bool m_UseLink;
 153             // TRUE if m_Link is not empty
 154     long m_CharHeight, m_CharWidth;
 155             // average height of normal-sized text
 156     int m_Align;
 157             // actual alignment
 158
 159     wxFont* m_FontsTable[2][2][2][2][7];
 160     wxString m_FontsFacesTable[2][2][2][2][7];
 161     wxFontEncoding m_FontsEncTable[2][2][2][2][7];
 162             // table of loaded fonts. 1st four indexes are 0 or 1, depending on on/off
 163             // state of these flags (from left to right):
 164             // [bold][italic][underlined][fixed_size]
 165             // last index is font size : from 0 to 6 (remapped from html sizes 1 to 7)
 166             // Note : this table covers all possible combinations of fonts, but not
 167             // all of them are used, so many items in table are usually NULL.
 168     int m_FontsSizes[7];
 169     wxString m_FontFaceFixed, m_FontFaceNormal;
 170             // html font sizes and faces of fixed and proportional fonts
 171
 172     wxFontEncoding m_InputEnc, m_OutputEnc;
 173             // I/O font encodings
 174     wxEncodingConverter *m_EncConv;
 175 };
 176
 177
 178
 179
 180
 181
 182 //--------------------------------------------------------------------------------
 183 // wxHtmlWinTagHandler
 184 //                  This is basicly wxHtmlTagHandler except
 185 //                  it is extended with protected member m_Parser pointing to
 186 //                  the wxHtmlWinParser object
 187 //--------------------------------------------------------------------------------
 188
 189 class WXDLLEXPORT wxHtmlWinTagHandler : public wxHtmlTagHandler
 190 {
 191     DECLARE_ABSTRACT_CLASS(wxHtmlWinTagHandler)
 192
 193 public:
 194     wxHtmlWinTagHandler() : wxHtmlTagHandler() {};
 195
 196     virtual void SetParser(wxHtmlParser *parser) {wxHtmlTagHandler::SetParser(parser); m_WParser = (wxHtmlWinParser*) parser;};
 197
 198 protected:
 199     wxHtmlWinParser *m_WParser; // same as m_Parser, but overcasted
 200 };
 201
 202
 203
 204
 205
 206
 207 //--------------------------------------------------------------------------------
 208 // wxHtmlTagsModule
 209 //                  This is basic of dynamic tag handlers binding.
 210 //                  The class provides methods for filling parser's handlers
 211 //                  hash table.
 212 //                  (See documentation for details)
 213 //--------------------------------------------------------------------------------
 214
 215 class WXDLLEXPORT wxHtmlTagsModule : public wxModule
 216 {
 217     DECLARE_DYNAMIC_CLASS(wxHtmlTagsModule)
 218
 219 public:
 220     wxHtmlTagsModule() : wxModule() {};
 221
 222     virtual bool OnInit();
 223     virtual void OnExit();
 224
 225     // This is called by wxHtmlWinParser.
 226     // The method must simply call parser->AddTagHandler(new <handler_class_name>);
 227     // for each handler
 228     virtual void FillHandlersTable(wxHtmlWinParser * WXUNUSED(parser)) { }
 229 };
 230
 231
 232 #endif
 233
 234 #endif // _WX_WINPARS_H_
 235
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