#ifndef _c_Custom_TE_Drawing_h
#define _c_Custom_TE_Drawing_h

	#include <TextEdit.h>

	// ===========================================================================
	//	cCustomTEDrawing.cpp	   Version 1.0	©1998 Joakim Braun All rights reserved.
	// ===========================================================================
	//
	//	CONTENTS:	A base class for providing TextEdit custom drawing behavior. 
	//			Mainly handles installing and removing of draw hooks. 
	//			Subclass to provide actual drawing behavior.

	//	HOW TO USE:	Derive a class from cCustomTEDrawing. Override DrawProc() to provide
	//			custom text drawing behavior. Attach the drawing object to a 
	//			multistyled TEHandle:

	//				new cCustomTEDrawingDerivedClass(myTEHandle);

	//			TextEdit will cause DrawProc() to be called whenever text needs to be drawn.
	//			When deallocating the TEHandle, don't forget to deallocate your "drawing object",
	//			a pointer to which is stored in the teRefCon field of the style handle:


	//				TEStyleHandle	styleH = ::TEGetStyleHandle(myTEHandle);
		
	//				if(styleH){
	//					cCustomTEDrawingDerivedClass* theDrawer = (cCustomTEDrawingDerivedClass*)(*styleH)->teRefCon;
				
	//					if(theDrawer)
	//						delete theDrawer;
	//				}


	//	cCustomTEDrawing is free for any and all use. 
	//	Do not distribute modified source code under my name.

	//	No support promised, no liability accepted. Provided "as is". 
	//	That said, I can be reached at braun@swipnet.se.
	//	Latest version at http://home4.swipnet.se/~w-41308/

	//	Change history:
	//	1.0	September 10, 1998		First release

		class cCustomTEDrawing{
		
		public:
			cCustomTEDrawing( void);
			cCustomTEDrawing( TEHandle theTEH);
		
			~cCustomTEDrawing( void );
			
			static void InstallHook(TEHandle theTEH, cCustomTEDrawing* theDrawer);
			static pascal void StaticTEDrawProc(void);
			static asm pascal void PrepareDrawProc(void);
			static asm pascal void CleanupDrawProc(void);
			
			static Uint16 CalcLineFromOffset(TEHandle theTEH, Uint16 offset);
			static Uint16 GetRealOffset(TEHandle theTEH, Uint16 fakeOffset);
													
		protected:
			TEHandle	mTEH;
			DrawHookUPP	mOldDrawHook,
					mNewDrawHook;
					
			virtual void DrawProc(void);
			virtual void CallDefaultDrawProc(void);
						
			static unsigned short 	sTextOffset,
						sDrawLen;
			static void*		sTextBufferPtr;
			static TEPtr 		sPTE;
			static TEHandle 	sHTE;
	};

#endif