This last it has different meaning, we don't want it to be parsed by myitems handler!
// handler can handle only 'myitems' (e.g. its GetSupportedTags returns "MYITEMS")
// you can call PushTagHandler(handler, "IT") when you find
// and call PopTagHandler() when you find
void PushTagHandler(wxHtmlTagHandler *handler, const wxString& tags);
// Restores state before last call to PushTagHandler
void PopTagHandler();
wxString* GetSource() {return &m_Source;}
void SetSource(const wxString& src);
// Sets HTML source and remembers current parser's state so that it can
// later be restored. This is useful for on-line modifications of
// HTML source (for example, handler replaces spaces with
// and newlines with
)
virtual void SetSourceAndSaveState(const wxString& src);
// Restores parser's state from stack or returns false if the stack is
// empty
virtual bool RestoreState();
// Returns HTML source inside the element (i.e. between the starting
// and ending tag)
wxString GetInnerSource(const wxHtmlTag& tag);
// Parses HTML string 'markup' and extracts charset info from tag
// if present. Returns empty string if the tag is missing.
// For wxHTML's internal use.
static wxString ExtractCharsetInformation(const wxString& markup);
// Returns entity parser object, used to substitute HTML &entities;
wxHtmlEntitiesParser *GetEntitiesParser() const { return m_entitiesParser; }
protected:
// DOM structure
void CreateDOMTree();
void DestroyDOMTree();
void CreateDOMSubTree(wxHtmlTag *cur,
int begin_pos, int end_pos,
wxHtmlTagsCache *cache);
// Adds text to the output.
// This is called from Parse() and must be overriden in derived classes.
// txt is not guaranteed to be only one word. It is largest continuous part of text
// (= not broken by tags)
// NOTE : using char* because of speed improvements
virtual void AddText(const wxChar* txt) = 0;
// Adds tag and proceeds it. Parse() may (and usually is) called from this method.
// This is called from Parse() and may be overriden.
// Default behavior is that it looks for proper handler in m_Handlers. The tag is
// ignored if no hander is found.
// Derived class is *responsible* for filling in m_Handlers table.
virtual void AddTag(const wxHtmlTag& tag);
protected:
// DOM tree:
wxHtmlTag *m_CurTag;
wxHtmlTag *m_Tags;
wxHtmlTextPieces *m_TextPieces;
size_t m_CurTextPiece;
wxString m_Source;
wxHtmlParserState *m_SavedStates;
// handlers that handle particular tags. The table is accessed by
// key = tag's name.
// This attribute MUST be filled by derived class otherwise it would
// be empty and no tags would be recognized
// (see wxHtmlWinParser for details about filling it)
// m_HandlersHash is for random access based on knowledge of tag name (BR, P, etc.)
// it may (and often does) contain more references to one object
// m_HandlersList is list of all handlers and it is guaranteed to contain
// only one reference to each handler instance.
wxList m_HandlersList;
wxHashTable m_HandlersHash;
DECLARE_NO_COPY_CLASS(wxHtmlParser)
// class for opening files (file system)
wxFileSystem *m_FS;
// handlers stack used by PushTagHandler and PopTagHandler
wxList *m_HandlersStack;
// entity parse
wxHtmlEntitiesParser *m_entitiesParser;
// flag indicating that the parser should stop
bool m_stopParsing;
};
// This class (and derived classes) cooperates with wxHtmlParser.
// Each recognized tag is passed to handler which is capable
// of handling it. Each tag is handled in 3 steps:
// 1. Handler will modifies state of parser
// (using its public methods)
// 2. Parser parses source between starting and ending tag
// 3. Handler restores original state of the parser
class WXDLLIMPEXP_HTML wxHtmlTagHandler : public wxObject
{
DECLARE_ABSTRACT_CLASS(wxHtmlTagHandler)
public:
wxHtmlTagHandler() : wxObject () { m_Parser = NULL; }
// Sets the parser.
// NOTE : each _instance_ of handler is guaranteed to be called
// only by one parser. This means you don't have to care about
// reentrancy.
virtual void SetParser(wxHtmlParser *parser)
{ m_Parser = parser; }
// Returns list of supported tags. The list is in uppercase and
// tags are delimited by ','.
// Example : "I,B,FONT,P"
// is capable of handling italic, bold, font and paragraph tags
virtual wxString GetSupportedTags() = 0;
// This is hadling core method. It does all the Steps 1-3.
// To process step 2, you can call ParseInner()
// returned value : true if it called ParseInner(),
// false etherwise
virtual bool HandleTag(const wxHtmlTag& tag) = 0;
protected:
// parses input between beginning and ending tag.
// m_Parser must be set.
void ParseInner(const wxHtmlTag& tag)
{ m_Parser->DoParsing(tag.GetBeginPos(), tag.GetEndPos1()); }
// Parses given source as if it was tag's inner code (see
// wxHtmlParser::GetInnerSource). Unlike ParseInner(), this method lets
// you specify the source code to parse. This is useful when you need to
// modify the inner text before parsing.
void ParseInnerSource(const wxString& source);
wxHtmlParser *m_Parser;
DECLARE_NO_COPY_CLASS(wxHtmlTagHandler)
};
// This class is used to parse HTML entities in strings. It can handle
// both named entities and &#xxxx entries where xxxx is Unicode code.
class WXDLLIMPEXP_HTML wxHtmlEntitiesParser : public wxObject
{
DECLARE_DYNAMIC_CLASS(wxHtmlEntitiesParser)
public:
wxHtmlEntitiesParser();
virtual ~wxHtmlEntitiesParser();
// Sets encoding of output string.
// Has no effect if wxUSE_WCHAR_T==0 or wxUSE_UNICODE==1
void SetEncoding(wxFontEncoding encoding);
// Parses entities in input and replaces them with respective characters
// (with respect to output encoding)
wxString Parse(const wxString& input);
// Returns character for given entity or 0 if the enity is unknown
wxChar GetEntityChar(const wxString& entity);
// Returns character that represents given Unicode code
#if wxUSE_UNICODE
wxChar GetCharForCode(unsigned code) { return (wxChar)code; }
#else
wxChar GetCharForCode(unsigned code);
#endif
protected:
#if wxUSE_WCHAR_T && !wxUSE_UNICODE
wxMBConv *m_conv;
wxFontEncoding m_encoding;
#endif
DECLARE_NO_COPY_CLASS(wxHtmlEntitiesParser)
};
#endif
#endif // _WX_HTMLPARS_H_