#pragma once

#include "Types.h"
#include "win32/CustomDrawn.h"
#include "win32/DeviceContext.h"
#include "win32/GdiObj.h"
#include <boost/signals2.hpp>

class CMemoryView : public Framework::Win32::CCustomDrawn
{
public:
											CMemoryView(HWND, const RECT&);
	virtual									~CMemoryView();
	
	void									SetMemorySize(uint32);

	uint32									GetBytesPerLine() const;
	void									SetBytesPerLine(uint32);

	uint32									GetSelection();
	void									SetSelectionStart(unsigned int);

	boost::signals2::signal<void (uint32)>	OnSelectionChange;

protected:
	enum
	{
		ID_MEMORYVIEW_COLUMNS_AUTO = 40001,
		ID_MEMORYVIEW_COLUMNS_16BYTES,
		ID_MEMORYVIEW_COLUMNS_32BYTES,
		ID_MEMORYVIEW_MENU_MAX
	};

	virtual uint8							GetByte(uint32) = 0;
	virtual HMENU							CreateContextualMenu();

	void									Paint(HDC) override;

	long									OnCommand(unsigned short, unsigned short, HWND) override;
	long									OnSize(unsigned int, unsigned int, unsigned int) override;
	long									OnVScroll(unsigned int, unsigned int) override;
	long									OnSetFocus() override;
	long									OnKillFocus() override;
	long									OnMouseWheel(int, int, short) override;
	long									OnLeftButtonDown(int, int) override;
	long									OnLeftButtonUp(int, int) override;
	long									OnRightButtonUp(int, int) override;
	long									OnKeyDown(WPARAM, LPARAM) override;

	Framework::Win32::CFont					m_font;

private:
	struct RENDERMETRICS
	{
		unsigned int	xmargin = 0;
		unsigned int	ymargin = 0;
		unsigned int	yspace = 0;
		unsigned int	byteSpacing = 0;
		unsigned int	lineSectionSpacing = 0;
	};

	struct RENDERPARAMS
	{
		unsigned int	lines = 0;
		unsigned int	totallyVisibleLines = 0;
		unsigned int	bytesPerLine = 0;
		uint32			address = 0;
	};

	void									UpdateScrollRange();
	unsigned int							GetScrollOffset();
	unsigned int							GetScrollThumbPosition();
	void									UpdateCaretPosition();
	void									EnsureSelectionVisible();
	RENDERPARAMS							GetRenderParams();

	uint32									m_selectionStart = 0;
	uint32									m_size = 0;
	uint32									m_bytesPerLine = 0;
	RENDERMETRICS							m_renderMetrics;
};