/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/
//////////////////////////////////////////////////////////////////////////////
//																			//
//	pfGUIMultiLineEditCtrl Header											//
//																			//
//////////////////////////////////////////////////////////////////////////////

#ifndef _pfGUIMultiLineEditCtrl_h
#define _pfGUIMultiLineEditCtrl_h

#include "pfGUIControlMod.h"
#include "hsTemplates.h"

#include "../plInputCore/plInputDevice.h"

class plMessage;
class hsGMaterial;
class plTextGenerator;
class pfMLScrollProc;
class pfGUIValueCtrl;

struct plUndoAction;

class pfGUIMultiLineEditProc
{
public:
	pfGUIMultiLineEditProc() {}
	virtual ~pfGUIMultiLineEditProc() {}

	// we've hit the end of the control list (by moving the cursor)
	virtual void OnEndOfControlList(Int32 cursorPos) {}

	// we've hit the beginning of the control ist (by moving the cursor)
	virtual void OnBeginningOfControlList(Int32 cursorPos) {}
};

class pfGUIMultiLineEditCtrl : public pfGUIControlMod
{
	public:
		enum Direction
		{
			kLineStart = 1,
			kLineEnd,
			kBufferStart,
			kBufferEnd,
			kOneBack,
			kOneForward,
			kOneWordBack,
			kOneWordForward,
			kOneLineUp,
			kOneLineDown,
			kPageUp,
			kPageDown
		};

	protected:

		mutable hsTArray<wchar_t>	fBuffer;		// Because AcquireArray() isn't const

		hsTArray<Int32>	fLineStarts;
		UInt16			fLineHeight, fCurrCursorX, fCurrCursorY;
		Int32			fCursorPos, fLastCursorLine;
		hsBool			fIgnoreNextKey, fReadyToRender;
		hsBounds3Ext	fLastP2PArea;
		Int8			fLockCount;
		UInt8			fCalcedFontSize;	// The font size that we calced our line height at

		UInt8			fLastKeyModifiers;
		wchar_t			fLastKeyPressed;

		static wchar_t	fColorCodeChar, fStyleCodeChar;
		static UInt32	fColorCodeSize, fStyleCodeSize;
		
		wchar_t			fLastDeadKey; // if the previous key was a dead key, its value goes here
		wchar_t			fDeadKeyConverter[256][256]; // first index is the dead key, second index is the char to combine it with

		void SetupDeadKeyConverter();

		virtual hsBool	IEval( double secs, hsScalar del, UInt32 dirty ); // called only by owner object's Eval()

		virtual void	IPostSetUpDynTextMap( void );
		virtual void	IUpdate( void );
		void			IUpdate( Int32 startLine, Int32 endLine );

		friend class pfMLScrollProc;

		pfGUIValueCtrl	*fScrollControl;
		pfMLScrollProc	*fScrollProc;
		Int32			fScrollPos;
		Int32			fBufferLimit;

		pfGUIMultiLineEditCtrl *fNextCtrl; // used for linking multiple controls together to share a buffer
		pfGUIMultiLineEditCtrl *fPrevCtrl;

		pfGUIMultiLineEditProc *fEventProc; // where we send events to

		std::string fFontFace;
		hsColorRGBA fFontColor;
		UInt8		fFontSize;
		UInt8		fFontStyle;
		enum flagsSet
		{
			kFontFaceSet = 1,
			kFontColorSet = 2,
			kFontSizeSet = 4,
			kFontStyleSet = 8
		};
		UInt8		fFontFlagsSet;

		int		fTopMargin,fLeftMargin,fBottomMargin,fRightMargin;

		void	IMoveCursor( Direction dir );
		void	IMoveCursorTo( Int32 position );	// Updates selection
		void	ISetCursor( Int32 newPosition );	// Doesn't update selection

		Int32	IRecalcLineStarts( Int32 startingLine, hsBool force, hsBool dontUpdate = false );
		void	IRecalcFromCursor( hsBool forceUpdate = false );
		Int32	IFindCursorLine( Int32 cursorPos = -1 ) const;
		hsBool	IStoreLineStart( UInt32 line, Int32 start );
		void	IOffsetLineStarts( UInt32 position, Int32 offset, hsBool offsetSelectionEnd = false );
		Int32	IPointToPosition( Int16 x, Int16 y, hsBool searchOutsideBounds = false );
		Int32	ICalcNumVisibleLines( void ) const;

		void	IReadColorCode( Int32 &pos, hsColorRGBA &color ) const;
		void	IReadStyleCode( Int32 &pos, UInt8 &fontStyle ) const;
		UInt32	IRenderLine( UInt16 x, UInt16 y, Int32 start, Int32 end, hsBool dontRender = false );
		hsBool	IFindLastColorCode( Int32 pos, hsColorRGBA &color, hsBool ignoreFirstCharacter = false ) const;
		hsBool	IFindLastStyleCode( Int32 pos, UInt8 &style, hsBool ignoreFirstCharacter = false ) const;

		inline static bool	IIsCodeChar( const wchar_t c );
		inline static bool	IIsRenderable( const wchar_t c );
		inline static Int32	IOffsetToNextChar( wchar_t stringChar );
		inline Int32		IOffsetToNextCharFromPos( Int32 pos ) const;

		void	IActuallyInsertColor( Int32 pos, hsColorRGBA &color );
		void	IActuallyInsertStyle( Int32 pos, UInt8 style );

		void	IUpdateScrollRange( void );

		wchar_t	*ICopyRange( Int32 start, Int32 end ) const;

		Int32	ICharPosToBufferPos( Int32 charPos ) const;

		void	IUpdateBuffer();
		void	IUpdateLineStarts();
		void	ISetGlobalBuffer();
		void	ISetLineStarts(hsTArray<Int32> lineStarts);

		void	IHitEndOfControlList(Int32 cursorPos);
		void	IHitBeginningOfControlList(Int32 cursorPos);

	public:

		enum
		{
			kRefScrollCtrl = kRefDerivedStart
		};

		pfGUIMultiLineEditCtrl();
		virtual ~pfGUIMultiLineEditCtrl();

		CLASSNAME_REGISTER( pfGUIMultiLineEditCtrl );
		GETINTERFACE_ANY( pfGUIMultiLineEditCtrl, pfGUIControlMod );

		virtual hsBool	MsgReceive( plMessage* pMsg );
		
		virtual void Read( hsStream* s, hsResMgr* mgr );
		virtual void Write( hsStream* s, hsResMgr* mgr );

		virtual void	HandleMouseDown( hsPoint3 &mousePt, UInt8 modifiers );
		virtual void	HandleMouseUp( hsPoint3 &mousePt, UInt8 modifiers );
		virtual void	HandleMouseDrag( hsPoint3 &mousePt, UInt8 modifiers );

		virtual hsBool	HandleKeyPress( char key, UInt8 modifiers );
		virtual hsBool	HandleKeyEvent( pfGameGUIMgr::EventType event, plKeyDef key, UInt8 modifiers );

		virtual void	PurgeDynaTextMapImage();

		virtual void	UpdateColorScheme() { fFontFlagsSet = 0; pfGUIControlMod::UpdateColorScheme(); }

		// Extended event types
		enum ExtendedEvents
		{
			kValueChanging,
			kScrollPosChanged,
			kKeyPressedEvent
		};

		void	SetScrollPosition( Int32 topLine );
		Int32	GetScrollPosition();
		void	MoveCursor( Direction dir );

		void	InsertChar( char c );
		void	InsertChar( wchar_t c);
		void	InsertString( const char *string );
		void	InsertString( const wchar_t *string );
		void	InsertColor( hsColorRGBA &color );
		void	InsertStyle( UInt8 fontStyle );
		void	DeleteChar( void );
		void	ClearBuffer( void );
		void	SetBuffer( const char *asciiText );
		void	SetBuffer( const wchar_t *asciiText );
		void	SetBuffer( const UInt8 *codedText, UInt32 length );
		void	SetBuffer( const UInt16 *codedText, UInt32 length );
		char	*GetNonCodedBuffer( void ) const;
		wchar_t	*GetNonCodedBufferW( void ) const;
		UInt8	*GetCodedBuffer( UInt32 &length ) const;
		UInt16	*GetCodedBufferW( UInt32 &length ) const;
		UInt32	GetBufferSize();

		void	SetBufferLimit(Int32 limit) { fBufferLimit = limit; }
		Int32	GetBufferLimit() { return fBufferLimit; }

		void	GetThisKeyPressed( char &key, UInt8 &modifiers ) const { key = (char)fLastKeyPressed; modifiers = fLastKeyModifiers; }

		void	Lock( void );
		void	Unlock( void );
		hsBool	IsLocked( void ) const { return ( fLockCount > 0 ) ? true : false; }
		
		void	SetScrollEnable( hsBool state );

		void	ForceUpdate() {/*IRecalcLineStarts(0,true);*/IUpdateLineStarts(); IUpdate();}

		void	SetNext( pfGUIMultiLineEditCtrl *newNext );
		void	ClearNext();
		void	SetPrev( pfGUIMultiLineEditCtrl *newPrev );
		void	ClearPrev();
		void	SetEventProc( pfGUIMultiLineEditProc *eventProc );
		void	ClearEventProc();
		Int32	GetFirstVisibleLine();
		Int32	GetLastVisibleLine();
		Int32	GetNumVisibleLines() {return ICalcNumVisibleLines();}
		void	SetGlobalStartLine(Int32 line);

		void	SetCursorToLoc(Int32 loc) {ISetCursor(loc);}

		void	SetMargins(int top, int left, int bottom, int right);

		UInt8	GetFontSize() {return fFontSize;} // because we're too cool to use the color scheme crap

		void	SetFontFace(std::string fontFace);
		void	SetFontColor(hsColorRGBA fontColor) {fFontColor = fontColor; fFontFlagsSet |= kFontColorSet;}
		void	SetFontSize(UInt8 fontSize);
		void	SetFontStyle(UInt8 fontStyle) {fFontStyle = fontStyle; fFontFlagsSet |= kFontStyleSet;}

		hsBool	ShowingBeginningOfBuffer();
		hsBool	ShowingEndOfBuffer();

		void	DeleteLinesFromTop(int numLines); // cursor and scroll position might be off after this call, not valid on connected controls
};

#endif // _pfGUIMultiLineEditCtrl_h
