include/wx/html/htmltag.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        htmltag.h
   3 // Purpose:     wxHtmlTag class (represents single tag)
   4 // Author:      Vaclav Slavik
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1999 Vaclav Slavik
   7 // Licence:     wxWindows Licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11 #ifndef _WX_HTMLTAG_H_
  12 #define _WX_HTMLTAG_H_
  13
  14 #if defined(__GNUG__) && !defined(__APPLE__)
  15 #pragma interface "htmltag.h"
  16 #endif
  17
  18 #include "wx/defs.h"
  19
  20 #if wxUSE_HTML
  21
  22 #include "wx/object.h"
  23
  24 class WXDLLEXPORT wxColour;
  25 class WXDLLEXPORT wxHtmlEntitiesParser;
  26
  27 //-----------------------------------------------------------------------------
  28 // wxHtmlTagsCache
  29 //          - internal wxHTML class, do not use!
  30 //-----------------------------------------------------------------------------
  31
  32 struct wxHtmlCacheItem;
  33
  34 class WXDLLEXPORT wxHtmlTagsCache : public wxObject
  35 {
  36     DECLARE_DYNAMIC_CLASS(wxHtmlTagsCache)
  37
  38 private:
  39     wxHtmlCacheItem *m_Cache;
  40     int m_CacheSize;
  41     int m_CachePos;
  42
  43 public:
  44     wxHtmlTagsCache() : wxObject() {m_CacheSize = 0; m_Cache = NULL;}
  45     wxHtmlTagsCache(const wxString& source);
  46     ~wxHtmlTagsCache() {free(m_Cache);}
  47
  48     // Finds parameters for tag starting at at and fills the variables
  49     void QueryTag(int at, int* end1, int* end2);
  50
  51     DECLARE_NO_COPY_CLASS(wxHtmlTagsCache)
  52 };
  53
  54
  55 //--------------------------------------------------------------------------------
  56 // wxHtmlTag
  57 //                  This represents single tag. It is used as internal structure
  58 //                  by wxHtmlParser.
  59 //--------------------------------------------------------------------------------
  60
  61 class WXDLLEXPORT wxHtmlTag : public wxObject
  62 {
  63     DECLARE_CLASS(wxHtmlTag)
  64
  65 protected:
  66     // constructs wxHtmlTag object based on HTML tag.
  67     // The tag begins (with '<' character) at position pos in source
  68     // end_pos is position where parsing ends (usually end of document)
  69     wxHtmlTag(wxHtmlTag *parent,
  70               const wxString& source, int pos, int end_pos,
  71               wxHtmlTagsCache *cache,
  72               wxHtmlEntitiesParser *entParser);
  73     friend class wxHtmlParser;
  74 public:
  75     ~wxHtmlTag();
  76
  77     wxHtmlTag *GetParent() const {return m_Parent;}
  78     wxHtmlTag *GetFirstSibling() const;
  79     wxHtmlTag *GetLastSibling() const;
  80     wxHtmlTag *GetChildren() const { return m_FirstChild; }
  81     wxHtmlTag *GetPreviousSibling() const { return m_Prev; }
  82     wxHtmlTag *GetNextSibling() const {return m_Next; }
  83     // Return next tag, as if tree had been flattened
  84     wxHtmlTag *GetNextTag() const;
  85
  86     // Returns tag's name in uppercase.
  87     inline wxString GetName() const {return m_Name;}
  88
  89     // Returns TRUE if the tag has given parameter. Parameter
  90     // should always be in uppercase.
  91     // Example : <IMG SRC="test.jpg"> HasParam("SRC") returns TRUE
  92     bool HasParam(const wxString& par) const;
  93
  94     // Returns value of the param. Value is in uppercase unless it is
  95     // enclosed with "
  96     // Example : <P align=right> GetParam("ALIGN") returns (RIGHT)
  97     //           <P IMG SRC="WhaT.jpg"> GetParam("SRC") returns (WhaT.jpg)
  98     //                           (or ("WhaT.jpg") if with_commas == TRUE)
  99     wxString GetParam(const wxString& par, bool with_commas = FALSE) const;
 100
 101     // Convenience functions:
 102     bool GetParamAsColour(const wxString& par, wxColour *clr) const;
 103     bool GetParamAsInt(const wxString& par, int *clr) const;
 104
 105     // Scans param like scanf() functions family does.
 106     // Example : ScanParam("COLOR", "\"#%X\"", &clr);
 107     // This is always with with_commas=FALSE
 108     // Returns number of scanned values
 109     // (like sscanf() does)
 110     // NOTE: unlike scanf family, this function only accepts
 111     //       *one* parameter !
 112     int ScanParam(const wxString& par, const wxChar *format, void *param) const;
 113
 114     // Returns string containing all params.
 115     wxString GetAllParams() const;
 116
 117 #if WXWIN_COMPATIBILITY_2_2
 118     // return TRUE if this is ending tag (</something>) or FALSE
 119     // if it isn't (<something>)
 120     inline bool IsEnding() const {return FALSE;}
 121 #endif
 122
 123     // return TRUE if this there is matching ending tag
 124     inline bool HasEnding() const {return m_End1 >= 0;}
 125
 126     // returns beginning position of _internal_ block of text
 127     // See explanation (returned value is marked with *):
 128     // bla bla bla <MYTAG>* bla bla intenal text</MYTAG> bla bla
 129     inline int GetBeginPos() const {return m_Begin;}
 130     // returns ending position of _internal_ block of text.
 131     // bla bla bla <MYTAG> bla bla intenal text*</MYTAG> bla bla
 132     inline int GetEndPos1() const {return m_End1;}
 133     // returns end position 2 :
 134     // bla bla bla <MYTAG> bla bla internal text</MYTAG>* bla bla
 135     inline int GetEndPos2() const {return m_End2;}
 136
 137 private:
 138     wxString m_Name;
 139     int m_Begin, m_End1, m_End2;
 140     wxArrayString m_ParamNames, m_ParamValues;
 141
 142     // DOM tree relations:
 143     wxHtmlTag *m_Next;
 144     wxHtmlTag *m_Prev;
 145     wxHtmlTag *m_FirstChild, *m_LastChild;
 146     wxHtmlTag *m_Parent;
 147
 148     DECLARE_NO_COPY_CLASS(wxHtmlTag)
 149 };
 150
 151
 152
 153
 154
 155 #endif
 156
 157 #endif // _WX_HTMLTAG_H_
 158