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wxWidgets/include/wx/html/winpars.h
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292
wxWidgets/include/wx/html/winpars.h
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/////////////////////////////////////////////////////////////////////////////
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// Name: winpars.h
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// Purpose: wxHtmlWinParser class (parser to be used with wxHtmlWindow)
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// Author: Vaclav Slavik
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// RCS-ID: $Id: winpars.h 59260 2009-03-02 10:43:00Z VS $
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// Copyright: (c) 1999 Vaclav Slavik
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_WINPARS_H_
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#define _WX_WINPARS_H_
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#include "wx/defs.h"
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#if wxUSE_HTML
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#include "wx/module.h"
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#include "wx/font.h"
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#include "wx/html/htmlpars.h"
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#include "wx/html/htmlcell.h"
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#include "wx/encconv.h"
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class WXDLLIMPEXP_FWD_HTML wxHtmlWindow;
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class WXDLLIMPEXP_FWD_HTML wxHtmlWindowInterface;
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class WXDLLIMPEXP_FWD_HTML wxHtmlWinParser;
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class WXDLLIMPEXP_FWD_HTML wxHtmlWinTagHandler;
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class WXDLLIMPEXP_FWD_HTML wxHtmlTagsModule;
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struct wxHtmlWinParser_TextParsingState;
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//--------------------------------------------------------------------------------
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// wxHtmlWinParser
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// This class is derived from wxHtmlParser and its mail goal
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// is to parse HTML input so that it can be displayed in
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// wxHtmlWindow. It uses special wxHtmlWinTagHandler.
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//--------------------------------------------------------------------------------
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class WXDLLIMPEXP_HTML wxHtmlWinParser : public wxHtmlParser
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{
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DECLARE_ABSTRACT_CLASS(wxHtmlWinParser)
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friend class wxHtmlWindow;
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public:
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wxHtmlWinParser(wxHtmlWindowInterface *wndIface = NULL);
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virtual ~wxHtmlWinParser();
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virtual void InitParser(const wxString& source);
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virtual void DoneParser();
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virtual wxObject* GetProduct();
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virtual wxFSFile *OpenURL(wxHtmlURLType type, const wxString& url) const;
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// Set's the DC used for parsing. If SetDC() is not called,
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// parsing won't proceed
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virtual void SetDC(wxDC *dc, double pixel_scale = 1.0)
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{ m_DC = dc; m_PixelScale = pixel_scale; }
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wxDC *GetDC() {return m_DC;}
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double GetPixelScale() {return m_PixelScale;}
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int GetCharHeight() const {return m_CharHeight;}
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int GetCharWidth() const {return m_CharWidth;}
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// NOTE : these functions do _not_ return _actual_
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// height/width. They return h/w of default font
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// for this DC. If you want actual values, call
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// GetDC()->GetChar...()
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// returns interface to the rendering window
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wxHtmlWindowInterface *GetWindowInterface() {return m_windowInterface;}
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#if WXWIN_COMPATIBILITY_2_6
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// deprecated, use GetWindowInterface()->GetHTMLWindow() instead
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wxDEPRECATED( wxHtmlWindow *GetWindow() );
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#endif
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// Sets fonts to be used when displaying HTML page. (if size null then default sizes used).
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void SetFonts(const wxString& normal_face, const wxString& fixed_face, const int *sizes = NULL);
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// Sets font sizes to be relative to the given size or the system
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// default size; use either specified or default font
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void SetStandardFonts(int size = -1,
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const wxString& normal_face = wxEmptyString,
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const wxString& fixed_face = wxEmptyString);
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// Adds tags module. see wxHtmlTagsModule for details.
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static void AddModule(wxHtmlTagsModule *module);
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static void RemoveModule(wxHtmlTagsModule *module);
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// parsing-related methods. These methods are called by tag handlers:
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// Returns pointer to actual container. Common use in tag handler is :
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// m_WParser->GetContainer()->InsertCell(new ...);
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wxHtmlContainerCell *GetContainer() const {return m_Container;}
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// opens new container. This container is sub-container of opened
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// container. Sets GetContainer to newly created container
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// and returns it.
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wxHtmlContainerCell *OpenContainer();
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// works like OpenContainer except that new container is not created
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// but c is used. You can use this to directly set actual container
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wxHtmlContainerCell *SetContainer(wxHtmlContainerCell *c);
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// closes the container and sets actual Container to upper-level
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// container
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wxHtmlContainerCell *CloseContainer();
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int GetFontSize() const {return m_FontSize;}
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void SetFontSize(int s);
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int GetFontBold() const {return m_FontBold;}
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void SetFontBold(int x) {m_FontBold = x;}
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int GetFontItalic() const {return m_FontItalic;}
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void SetFontItalic(int x) {m_FontItalic = x;}
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int GetFontUnderlined() const {return m_FontUnderlined;}
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void SetFontUnderlined(int x) {m_FontUnderlined = x;}
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int GetFontFixed() const {return m_FontFixed;}
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void SetFontFixed(int x) {m_FontFixed = x;}
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wxString GetFontFace() const {return GetFontFixed() ? m_FontFaceFixed : m_FontFaceNormal;}
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void SetFontFace(const wxString& face);
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int GetAlign() const {return m_Align;}
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void SetAlign(int a) {m_Align = a;}
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wxHtmlScriptMode GetScriptMode() const { return m_ScriptMode; }
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void SetScriptMode(wxHtmlScriptMode mode) { m_ScriptMode = mode; }
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long GetScriptBaseline() const { return m_ScriptBaseline; }
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void SetScriptBaseline(long base) { m_ScriptBaseline = base; }
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const wxColour& GetLinkColor() const { return m_LinkColor; }
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void SetLinkColor(const wxColour& clr) { m_LinkColor = clr; }
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const wxColour& GetActualColor() const { return m_ActualColor; }
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void SetActualColor(const wxColour& clr) { m_ActualColor = clr ;}
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const wxHtmlLinkInfo& GetLink() const { return m_Link; }
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void SetLink(const wxHtmlLinkInfo& link);
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// applies current parser state (link, sub/supscript, ...) to given cell
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void ApplyStateToCell(wxHtmlCell *cell);
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#if !wxUSE_UNICODE
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void SetInputEncoding(wxFontEncoding enc);
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wxFontEncoding GetInputEncoding() const { return m_InputEnc; }
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wxFontEncoding GetOutputEncoding() const { return m_OutputEnc; }
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wxEncodingConverter *GetEncodingConverter() const { return m_EncConv; }
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#endif
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// creates font depending on m_Font* members.
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virtual wxFont* CreateCurrentFont();
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#if wxABI_VERSION >= 20808
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enum WhitespaceMode
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{
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Whitespace_Normal, // normal mode, collapse whitespace
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Whitespace_Pre // inside <pre>, keep whitespace as-is
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};
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// change the current whitespace handling mode
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void SetWhitespaceMode(WhitespaceMode mode);
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WhitespaceMode GetWhitespaceMode() const;
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#endif // wxABI_VERSION >= 20808
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protected:
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virtual void AddText(const wxChar* txt);
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private:
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void FlushWordBuf(wxChar *temp, int& templen, wxChar nbsp);
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void AddWord(wxHtmlWordCell *c);
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void AddWord(const wxString& word);
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void AddPreBlock(const wxString& text);
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bool m_tmpLastWasSpace;
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wxChar *m_tmpStrBuf;
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size_t m_tmpStrBufSize;
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// temporary variables used by AddText
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wxHtmlWindowInterface *m_windowInterface;
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// window we're parsing for
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double m_PixelScale;
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wxDC *m_DC;
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// Device Context we're parsing for
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static wxList m_Modules;
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// list of tags modules (see wxHtmlTagsModule for details)
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// This list is used to initialize m_Handlers member.
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wxHtmlContainerCell *m_Container;
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// current container. See Open/CloseContainer for details.
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int m_FontBold, m_FontItalic, m_FontUnderlined, m_FontFixed; // this is not true,false but 1,0, we need it for indexing
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int m_FontSize; /* -2 to +4, 0 is default */
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wxColour m_LinkColor;
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wxColour m_ActualColor;
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// basic font parameters.
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wxHtmlLinkInfo m_Link;
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// actual hypertext link or empty string
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bool m_UseLink;
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// true if m_Link is not empty
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long m_CharHeight, m_CharWidth;
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// average height of normal-sized text
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int m_Align;
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// actual alignment
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wxHtmlScriptMode m_ScriptMode;
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// current script mode (sub/sup/normal)
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long m_ScriptBaseline;
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// current sub/supscript base
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wxFont* m_FontsTable[2][2][2][2][7];
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wxString m_FontsFacesTable[2][2][2][2][7];
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#if !wxUSE_UNICODE
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wxFontEncoding m_FontsEncTable[2][2][2][2][7];
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#endif
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// table of loaded fonts. 1st four indexes are 0 or 1, depending on on/off
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// state of these flags (from left to right):
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// [bold][italic][underlined][fixed_size]
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// last index is font size : from 0 to 6 (remapped from html sizes 1 to 7)
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// Note : this table covers all possible combinations of fonts, but not
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// all of them are used, so many items in table are usually NULL.
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int m_FontsSizes[7];
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wxString m_FontFaceFixed, m_FontFaceNormal;
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// html font sizes and faces of fixed and proportional fonts
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#if !wxUSE_UNICODE
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wxFontEncoding m_InputEnc, m_OutputEnc;
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// I/O font encodings
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wxEncodingConverter *m_EncConv;
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#endif
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// NB: this pointer replaces m_lastWordCell pointer in wx<=2.8.7; this
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// way, wxHtmlWinParser remains ABI compatible with older versions
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// despite addition of two fields in wxHtmlWinParser_TextParsingState
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wxHtmlWinParser_TextParsingState *m_textParsingState;
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DECLARE_NO_COPY_CLASS(wxHtmlWinParser)
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};
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//-----------------------------------------------------------------------------
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// wxHtmlWinTagHandler
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// This is basicly wxHtmlTagHandler except
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// it is extended with protected member m_Parser pointing to
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// the wxHtmlWinParser object
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//-----------------------------------------------------------------------------
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class WXDLLIMPEXP_HTML wxHtmlWinTagHandler : public wxHtmlTagHandler
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{
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DECLARE_ABSTRACT_CLASS(wxHtmlWinTagHandler)
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public:
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wxHtmlWinTagHandler() : wxHtmlTagHandler() {}
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virtual void SetParser(wxHtmlParser *parser) {wxHtmlTagHandler::SetParser(parser); m_WParser = (wxHtmlWinParser*) parser;}
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protected:
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wxHtmlWinParser *m_WParser; // same as m_Parser, but overcasted
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DECLARE_NO_COPY_CLASS(wxHtmlWinTagHandler)
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};
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//----------------------------------------------------------------------------
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// wxHtmlTagsModule
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// This is basic of dynamic tag handlers binding.
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// The class provides methods for filling parser's handlers
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// hash table.
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// (See documentation for details)
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//----------------------------------------------------------------------------
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class WXDLLIMPEXP_HTML wxHtmlTagsModule : public wxModule
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{
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DECLARE_DYNAMIC_CLASS(wxHtmlTagsModule)
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public:
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wxHtmlTagsModule() : wxModule() {}
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virtual bool OnInit();
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virtual void OnExit();
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// This is called by wxHtmlWinParser.
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// The method must simply call parser->AddTagHandler(new
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// <handler_class_name>); for each handler
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virtual void FillHandlersTable(wxHtmlWinParser * WXUNUSED(parser)) { }
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};
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#endif
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#endif // _WX_WINPARS_H_
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