// ----------------------------------------------------------
// ITS82
// console_screen2.cpp
//
// Helper Functions for console screen manipulation
// Apr 2005
// ----------------------------------------------------------
// 
// Disclaimer:
// Hey, I just took reference from the web. So if the code
// doesn't work, you can blame the one who created internet.
//
// ----------------------------------------------------------

#include "console_screen2.h"
#include <conio.h>

// ----------------------------------------------------------
// This is a function that use to clear the screen
// ----------------------------------------------------------
void cls()
{
	HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);

	COORD coordScreen = { 0, 0 };    /* cursor position */
	DWORD cCharsWritten;
	CONSOLE_SCREEN_BUFFER_INFO csbi; /* used to get buffer info */
	DWORD dwConSize;                 /* number of character cells in the current buffer */

	/* get the number of character cells in the current buffer */
	GetConsoleScreenBufferInfo( hConsole, &csbi );
	dwConSize = csbi.dwSize.X * csbi.dwSize.Y;

	/* fill the entire screen with blanks */
	FillConsoleOutputCharacter( hConsole, (TCHAR) ' ', dwConSize, coordScreen, &cCharsWritten );

	/* get the current text attribute */
	GetConsoleScreenBufferInfo( hConsole, &csbi );

	/* now set the buffer's attributes accordingly */
	FillConsoleOutputAttribute( hConsole, csbi.wAttributes, dwConSize, coordScreen, &cCharsWritten );

	/* put the cursor at (0, 0) */
	SetConsoleCursorPosition( hConsole, coordScreen );
}

// ----------------------------------------------------------
// call this when you need the system wait for a period
// ----------------------------------------------------------
void wait(long ms)
{
	Sleep(ms);
}

// ----------------------------------------------------------
// call this when you want to detect if user press key
// return:
// 0 : no key has been input
// 1 to 127 : printable ascii code (most of) :P
// 128 - 255 : special code
//
// * Some useful code:
//		Esc - 27
//		F1 - 187
//		...
//		F10 - 196
//		F11 - 5
//		F12 - 6
//
//		UP - 200
//		DOWN - 208
//		LEFT - 203
//		RIGHT - 205
//
//		Insert - 210
//		Delete - 211
//		Home - 199
//		End - 207
//		PageUP - 201
//		PageDown - 209
//
// ----------------------------------------------------------
char getKey()
{
	unsigned char c;
	if(!_kbhit())
		return 0;
	c = (unsigned char)_getch();
	// on special key, need to _getch again
	if((c == 0) || (c == (unsigned char)0xE0))
		return((unsigned char)128 + (unsigned char)_getch());
	else
		return c;
}

// ----------------------------------------------------------
// Set the cursor position
// parameters: row is x, col is y.
// ----------------------------------------------------------
void setPos(int row, int col)     //簿笆positionノ
{
    HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
    COORD coordScreen = { col, row };
     
    SetConsoleCursorPosition(hConsole, coordScreen);
}

// ----------------------------------------------------------
// Get the screen size
// Using pass by reference
// ----------------------------------------------------------
void getScreenSize(int &width, int &height)
{
	HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
	CONSOLE_SCREEN_BUFFER_INFO csbi;
	GetConsoleScreenBufferInfo( hConsole, &csbi );
	width = csbi.dwSize.X;
	height = csbi.dwSize.Y;
}