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ExternalLexer.h

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// Scintilla source code edit control
/** @file ExternalLexer.h
 ** Support external lexers in DLLs.
 **/
// Copyright 2001 Simon Steele <ss@pnotepad.org>, portions copyright Neil Hodgson.
// The License.txt file describes the conditions under which this software may be distributed.

#ifndef EXTERNALLEXER_H
#define EXTERNALLEXER_H

#if PLAT_WIN
#define EXT_LEXER_DECL __stdcall
#else
#define EXT_LEXER_DECL 
#endif

// External Lexer function definitions...
typedef void (EXT_LEXER_DECL *ExtLexerFunction)(unsigned int lexer, unsigned int startPos, int length, int initStyle,
                  char *words[], WindowID window, char *props);
typedef void (EXT_LEXER_DECL *ExtFoldFunction)(unsigned int lexer, unsigned int startPos, int length, int initStyle,
                  char *words[], WindowID window, char *props);
typedef void* (EXT_LEXER_DECL *GetLexerFunction)(unsigned int Index);
typedef int (EXT_LEXER_DECL *GetLexerCountFn)();
typedef void (EXT_LEXER_DECL *GetLexerNameFn)(unsigned int Index, char *name, int buflength);

//class DynamicLibrary;

/// Sub-class of LexerModule to use an external lexer.
00029 class ExternalLexerModule : protected LexerModule {
protected:
      ExtLexerFunction fneLexer;
      ExtFoldFunction fneFolder;
      int externalLanguage;
      char name[100];
public:
      ExternalLexerModule(int language_, LexerFunction fnLexer_, 
            const char *languageName_=0, LexerFunction fnFolder_=0) : LexerModule(language_, fnLexer_, 0, fnFolder_){
            strncpy(name, languageName_, sizeof(name));
            languageName = name;
      };
      virtual void Lex(unsigned int startPos, int lengthDoc, int initStyle,
                              WordList *keywordlists[], Accessor &styler) const;
      virtual void Fold(unsigned int startPos, int lengthDoc, int initStyle,
                              WordList *keywordlists[], Accessor &styler) const;
      virtual void SetExternal(ExtLexerFunction fLexer, ExtFoldFunction fFolder, int index);
};

/// LexerMinder points to an ExternalLexerModule - so we don't leak them.
00049 class LexerMinder {
public:
      ExternalLexerModule *self;
      LexerMinder *next;
};

/// LexerLibrary exists for every External Lexer DLL, contains LexerMinders.
00056 class LexerLibrary {
      DynamicLibrary    *lib;
      LexerMinder       *first;
      LexerMinder       *last;

public:
      LexerLibrary(const char* ModuleName);
      ~LexerLibrary();
      void Release();
      
      LexerLibrary      *next;
      SString                 m_sModuleName;
};

/// LexerManager manages external lexers, contains LexerLibrarys.
00071 class LexerManager {
public:
      ~LexerManager();
      
      static LexerManager *GetInstance();
      static void DeleteInstance();
      
      void Load(const char* path);
      void Clear();

private:
      LexerManager();
      static LexerManager *theInstance;

      void LoadLexerLibrary(const char* module);
      LexerLibrary *first;
      LexerLibrary *last;
};

class LMMinder {
public:
      ~LMMinder();
};

#endif

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