+++ /dev/null
-/////////////////////////////////////////////////////////////////////////////
-// Name: htmlparser.h
-// Purpose: wxHtmlParser class (generic parser)
-// Author: Vaclav Slavik
-// Copyright: (c) 1999 Vaclav Slavik
-// Licence: wxWindows Licence
-/////////////////////////////////////////////////////////////////////////////
-
-
-#ifndef __HTMLPARSER_H__
-#define __HTMLPARSER_H__
-
-#ifdef __GNUG__
-#pragma interface
-#endif
-
-#include "wx/defs.h"
-#if wxUSE_HTML
-
-#include <wx/html/htmltag.h>
-#include <wx/filesys.h>
-
-class wxHtmlParser;
-class wxHtmlTagHandler;
-
-//--------------------------------------------------------------------------------
-// wxHtmlParser
-// This class handles generic parsing of HTML document : it scans
-// the document and divide it into blocks of tags (where one block
-// consists of starting and ending tag and of text between these
-// 2 tags.
-//--------------------------------------------------------------------------------
-
-class WXDLLEXPORT wxHtmlParser : public wxObject
-{
- DECLARE_ABSTRACT_CLASS(wxHtmlParser)
-
- protected:
- wxString m_Source;
- // source being parsed
- wxHtmlTagsCache *m_Cache;
- // tags cache, used during parsing.
- wxHashTable m_HandlersHash;
- wxList m_HandlersList;
- // 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.
- wxFileSystem *m_FS;
- // class for opening files (file system)
-
- public:
- wxHtmlParser() : wxObject(), m_HandlersHash(wxKEY_STRING) {m_FS = NULL; m_Cache = NULL;}
- virtual ~wxHtmlParser();
-
- void SetFS(wxFileSystem *fs) {m_FS = fs;}
- // Sets the class which will be used for opening files
- wxFileSystem* GetFS() const {return m_FS;}
-
- wxObject* Parse(const wxString& source);
- // You can simply call this method when you need parsed output.
- // This method does these things:
- // 1. call InitParser(source);
- // 2. call DoParsing();
- // 3. call GetProduct(); (it's return value is then returned)
- // 4. call DoneParser();
-
- virtual void InitParser(const wxString& source);
- // Sets the source. This must be called before running Parse() method.
- virtual void DoneParser();
- // This must be called after Parse().
-
- void DoParsing(int begin_pos, int end_pos);
- inline void DoParsing() {DoParsing(0, m_Source.Length());};
- // Parses the m_Source from begin_pos to end_pos-1.
- // (in noparams version it parses whole m_Source)
-
- virtual wxObject* GetProduct() = 0;
- // Returns product of parsing
- // Returned value is result of parsing of the part. The type of this result
- // depends on internal representation in derived parser
- // (see wxHtmlWinParser for details).
-
- virtual void AddTagHandler(wxHtmlTagHandler *handler);
- // adds handler to the list & hash table of handlers.
-
- wxString* GetSource() {return &m_Source;}
-
- virtual wxList* GetTempData() {return NULL;}
- // this method returns list of wxObjects that represents
- // all data allocated by the parser. These can't be freeded
- // by destructor because they must be valid as long as
- // GetProduct's return value is valid - the caller must
- // explicitly call delete MyParser -> GetTempData() to free
- // the memory
- // (this method always sets the list to delete its contents)
-
- protected:
-
- virtual void AddText(const char* txt) = 0;
- // 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 AddTag(const wxHtmlTag& tag);
- // 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.
-};
-
-
-
-
-
-
-//--------------------------------------------------------------------------------
-// wxHtmlTagHandler
-// 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 it's public methods)
-// 2. Parser parses source between starting and ending tag
-// 3. Handler restores original state of the parser
-//--------------------------------------------------------------------------------
-
-class WXDLLEXPORT wxHtmlTagHandler : public wxObject
-{
- DECLARE_ABSTRACT_CLASS(wxHtmlTagHandler)
-
- protected:
- wxHtmlParser *m_Parser;
-
- public:
- wxHtmlTagHandler() : wxObject () {m_Parser = NULL;};
-
- virtual void SetParser(wxHtmlParser *parser) {m_Parser = parser;}
- // 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 wxString GetSupportedTags() = 0;
- // 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 bool HandleTag(const wxHtmlTag& tag) = 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
-
- protected:
- void ParseInner(const wxHtmlTag& tag) {m_Parser -> DoParsing(tag.GetBeginPos(), tag.GetEndPos1());}
- // parses input between beginning and ending tag.
- // m_Parser must be set.
-};
-
-
-
-
-
-#endif // __HTMLPARSER_H__
-
-#endif
projects / wxWidgets.git / blobdiff