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htmltag.h
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C/C++ Source or Header
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2002-08-31
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155 lines
/////////////////////////////////////////////////////////////////////////////
// Name: htmltag.h
// Purpose: wxHtmlTag class (represents single tag)
// Author: Vaclav Slavik
// RCS-ID: $Id: htmltag.h,v 1.12 2002/08/31 11:29:12 GD Exp $
// Copyright: (c) 1999 Vaclav Slavik
// Licence: wxWindows Licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_HTMLTAG_H_
#define _WX_HTMLTAG_H_
#if defined(__GNUG__) && !defined(__APPLE__)
#pragma interface "htmltag.h"
#endif
#include "wx/defs.h"
#if wxUSE_HTML
#include "wx/object.h"
class WXDLLEXPORT wxColour;
class WXDLLEXPORT wxHtmlEntitiesParser;
//-----------------------------------------------------------------------------
// wxHtmlTagsCache
// - internal wxHTML class, do not use!
//-----------------------------------------------------------------------------
struct wxHtmlCacheItem;
class WXDLLEXPORT wxHtmlTagsCache : public wxObject
{
DECLARE_DYNAMIC_CLASS(wxHtmlTagsCache)
private:
wxHtmlCacheItem *m_Cache;
int m_CacheSize;
int m_CachePos;
public:
wxHtmlTagsCache() : wxObject() {m_CacheSize = 0; m_Cache = NULL;}
wxHtmlTagsCache(const wxString& source);
~wxHtmlTagsCache() {free(m_Cache);}
// Finds parameters for tag starting at at and fills the variables
void QueryTag(int at, int* end1, int* end2);
};
//--------------------------------------------------------------------------------
// wxHtmlTag
// This represents single tag. It is used as internal structure
// by wxHtmlParser.
//--------------------------------------------------------------------------------
class WXDLLEXPORT wxHtmlTag : public wxObject
{
DECLARE_CLASS(wxHtmlTag)
protected:
// constructs wxHtmlTag object based on HTML tag.
// The tag begins (with '<' character) at position pos in source
// end_pos is position where parsing ends (usually end of document)
wxHtmlTag(wxHtmlTag *parent,
const wxString& source, int pos, int end_pos,
wxHtmlTagsCache *cache,
wxHtmlEntitiesParser *entParser);
friend class wxHtmlParser;
public:
~wxHtmlTag();
wxHtmlTag *GetParent() const {return m_Parent;}
wxHtmlTag *GetFirstSibling() const;
wxHtmlTag *GetLastSibling() const;
wxHtmlTag *GetChildren() const { return m_FirstChild; }
wxHtmlTag *GetPreviousSibling() const { return m_Prev; }
wxHtmlTag *GetNextSibling() const {return m_Next; }
// Return next tag, as if tree had been flattened
wxHtmlTag *GetNextTag() const;
// Returns tag's name in uppercase.
inline wxString GetName() const {return m_Name;}
// Returns TRUE if the tag has given parameter. Parameter
// should always be in uppercase.
// Example : <IMG SRC="test.jpg"> HasParam("SRC") returns TRUE
bool HasParam(const wxString& par) const;
// Returns value of the param. Value is in uppercase unless it is
// enclosed with "
// Example : <P align=right> GetParam("ALIGN") returns (RIGHT)
// <P IMG SRC="WhaT.jpg"> GetParam("SRC") returns (WhaT.jpg)
// (or ("WhaT.jpg") if with_commas == TRUE)
wxString GetParam(const wxString& par, bool with_commas = FALSE) const;
// Convenience functions:
bool GetParamAsColour(const wxString& par, wxColour *clr) const;
bool GetParamAsInt(const wxString& par, int *clr) const;
// Scans param like scanf() functions family does.
// Example : ScanParam("COLOR", "\"#%X\"", &clr);
// This is always with with_commas=FALSE
// Returns number of scanned values
// (like sscanf() does)
// NOTE: unlike scanf family, this function only accepts
// *one* parameter !
int ScanParam(const wxString& par, const wxChar *format, void *param) const;
// Returns string containing all params.
wxString GetAllParams() const;
#if WXWIN_COMPATIBILITY_2_2
// return TRUE if this is ending tag (</something>) or FALSE
// if it isn't (<something>)
inline bool IsEnding() const {return FALSE;}
#endif
// return TRUE if this there is matching ending tag
inline bool HasEnding() const {return m_End1 >= 0;}
// returns beginning position of _internal_ block of text
// See explanation (returned value is marked with *):
// bla bla bla <MYTAG>* bla bla intenal text</MYTAG> bla bla
inline int GetBeginPos() const {return m_Begin;}
// returns ending position of _internal_ block of text.
// bla bla bla <MYTAG> bla bla intenal text*</MYTAG> bla bla
inline int GetEndPos1() const {return m_End1;}
// returns end position 2 :
// bla bla bla <MYTAG> bla bla internal text</MYTAG>* bla bla
inline int GetEndPos2() const {return m_End2;}
private:
wxString m_Name;
int m_Begin, m_End1, m_End2;
wxArrayString m_ParamNames, m_ParamValues;
// DOM tree relations:
wxHtmlTag *m_Next;
wxHtmlTag *m_Prev;
wxHtmlTag *m_FirstChild, *m_LastChild;
wxHtmlTag *m_Parent;
};
#endif
#endif // _WX_HTMLTAG_H_