include/wx/html/htmltag.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/html/htmltag.h
   3 // Purpose:     wxHtmlTag class (represents single tag)
   4 // Author:      Vaclav Slavik
   5 // Copyright:   (c) 1999 Vaclav Slavik
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 #ifndef _WX_HTMLTAG_H_
  10 #define _WX_HTMLTAG_H_
  11
  12 #include "wx/defs.h"
  13
  14 #if wxUSE_HTML
  15
  16 #include "wx/object.h"
  17 #include "wx/arrstr.h"
  18
  19 class WXDLLIMPEXP_FWD_CORE wxColour;
  20 class WXDLLIMPEXP_FWD_HTML wxHtmlEntitiesParser;
  21
  22 //-----------------------------------------------------------------------------
  23 // wxHtmlTagsCache
  24 //          - internal wxHTML class, do not use!
  25 //-----------------------------------------------------------------------------
  26
  27 class wxHtmlTagsCacheData;
  28
  29 class WXDLLIMPEXP_HTML wxHtmlTagsCache
  30 {
  31 private:
  32     wxHtmlTagsCacheData *m_Cache;
  33     int m_CachePos;
  34
  35     wxHtmlTagsCacheData& Cache() { return *m_Cache; }
  36
  37 public:
  38     wxHtmlTagsCache() {m_Cache = NULL;}
  39     wxHtmlTagsCache(const wxString& source);
  40     virtual ~wxHtmlTagsCache();
  41
  42     // Finds parameters for tag starting at at and fills the variables
  43     void QueryTag(const wxString::const_iterator& at,
  44                   const wxString::const_iterator& inputEnd,
  45                   wxString::const_iterator *end1,
  46                   wxString::const_iterator *end2,
  47                   bool *hasEnding);
  48
  49     wxDECLARE_NO_COPY_CLASS(wxHtmlTagsCache);
  50 };
  51
  52
  53 //--------------------------------------------------------------------------------
  54 // wxHtmlTag
  55 //                  This represents single tag. It is used as internal structure
  56 //                  by wxHtmlParser.
  57 //--------------------------------------------------------------------------------
  58
  59 class WXDLLIMPEXP_HTML wxHtmlTag
  60 {
  61 protected:
  62     // constructs wxHtmlTag object based on HTML tag.
  63     // The tag begins (with '<' character) at position pos in source
  64     // end_pos is position where parsing ends (usually end of document)
  65     wxHtmlTag(wxHtmlTag *parent,
  66               const wxString *source,
  67               const wxString::const_iterator& pos,
  68               const wxString::const_iterator& end_pos,
  69               wxHtmlTagsCache *cache,
  70               wxHtmlEntitiesParser *entParser);
  71     friend class wxHtmlParser;
  72 public:
  73     ~wxHtmlTag();
  74
  75     wxHtmlTag *GetParent() const {return m_Parent;}
  76     wxHtmlTag *GetFirstSibling() const;
  77     wxHtmlTag *GetLastSibling() const;
  78     wxHtmlTag *GetChildren() const { return m_FirstChild; }
  79     wxHtmlTag *GetPreviousSibling() const { return m_Prev; }
  80     wxHtmlTag *GetNextSibling() const {return m_Next; }
  81     // Return next tag, as if tree had been flattened
  82     wxHtmlTag *GetNextTag() const;
  83
  84     // Returns tag's name in uppercase.
  85     inline wxString GetName() const {return m_Name;}
  86
  87     // Returns true if the tag has given parameter. Parameter
  88     // should always be in uppercase.
  89     // Example : <IMG SRC="test.jpg"> HasParam("SRC") returns true
  90     bool HasParam(const wxString& par) const;
  91
  92     // Returns value of the param. Value is in uppercase unless it is
  93     // enclosed with "
  94     // Example : <P align=right> GetParam("ALIGN") returns (RIGHT)
  95     //           <P IMG SRC="WhaT.jpg"> GetParam("SRC") returns (WhaT.jpg)
  96     //                           (or ("WhaT.jpg") if with_quotes == true)
  97     wxString GetParam(const wxString& par, bool with_quotes = false) const;
  98
  99     // Return true if the string could be parsed as an HTML colour and false
 100     // otherwise.
 101     static bool ParseAsColour(const wxString& str, wxColour *clr);
 102
 103     // Convenience functions:
 104     bool GetParamAsColour(const wxString& par, wxColour *clr) const;
 105     bool GetParamAsInt(const wxString& par, int *clr) const;
 106     bool GetParamAsIntOrPercent(const wxString& param,
 107                                 int* value, bool& isPercent) const;
 108
 109     // Scans param like scanf() functions family does.
 110     // Example : ScanParam("COLOR", "\"#%X\"", &clr);
 111     // This is always with with_quotes=false
 112     // Returns number of scanned values
 113     // (like sscanf() does)
 114     // NOTE: unlike scanf family, this function only accepts
 115     //       *one* parameter !
 116     int ScanParam(const wxString& par, const char *format, void *param) const;
 117     int ScanParam(const wxString& par, const wchar_t *format, void *param) const;
 118
 119     // Returns string containing all params.
 120     wxString GetAllParams() const;
 121
 122     // return true if there is matching ending tag
 123     inline bool HasEnding() const {return m_hasEnding;}
 124
 125     // returns beginning position of _internal_ block of text as iterator
 126     // into parser's source string (see wxHtmlParser::GetSource())
 127     // See explanation (returned value is marked with *):
 128     // bla bla bla <MYTAG>* bla bla intenal text</MYTAG> bla bla
 129     wxString::const_iterator GetBeginIter() const
 130         { return m_Begin; }
 131     // returns ending position of _internal_ block of text as iterator
 132     // into parser's source string (see wxHtmlParser::GetSource()):
 133     // bla bla bla <MYTAG> bla bla intenal text*</MYTAG> bla bla
 134     wxString::const_iterator GetEndIter1() const { return m_End1; }
 135     // returns end position 2 as iterator
 136     // into parser's source string (see wxHtmlParser::GetSource()):
 137     // bla bla bla <MYTAG> bla bla internal text</MYTAG>* bla bla
 138     wxString::const_iterator GetEndIter2() const { return m_End2; }
 139
 140 #if WXWIN_COMPATIBILITY_2_8
 141     // use GetBeginIter(), GetEndIter1() and GetEndIter2() instead
 142     wxDEPRECATED( inline int GetBeginPos() const );
 143     wxDEPRECATED( inline int GetEndPos1() const );
 144     wxDEPRECATED( inline int GetEndPos2() const );
 145 #endif // WXWIN_COMPATIBILITY_2_8
 146
 147 private:
 148     wxString m_Name;
 149     bool m_hasEnding;
 150     wxString::const_iterator m_Begin, m_End1, m_End2;
 151     wxArrayString m_ParamNames, m_ParamValues;
 152 #if WXWIN_COMPATIBILITY_2_8
 153     wxString::const_iterator m_sourceStart;
 154 #endif
 155
 156     // DOM tree relations:
 157     wxHtmlTag *m_Next;
 158     wxHtmlTag *m_Prev;
 159     wxHtmlTag *m_FirstChild, *m_LastChild;
 160     wxHtmlTag *m_Parent;
 161
 162     wxDECLARE_NO_COPY_CLASS(wxHtmlTag);
 163 };
 164
 165
 166 #if WXWIN_COMPATIBILITY_2_8
 167 inline int wxHtmlTag::GetBeginPos() const { return int(m_Begin - m_sourceStart); }
 168 inline int wxHtmlTag::GetEndPos1() const { return int(m_End1 - m_sourceStart); }
 169 inline int wxHtmlTag::GetEndPos2() const { return int(m_End2 - m_sourceStart); }
 170 #endif // WXWIN_COMPATIBILITY_2_8
 171
 172
 173
 174
 175 #endif // wxUSE_HTML
 176
 177 #endif // _WX_HTMLTAG_H_
 178