/*-------------------------------------------------------------------+
 * 1. ÆÄÀϸí: key.js
 * 2. ¼³  ¸í: Key ÀÔ·ÂÀ» Á¦ÇÑÇϱâ À§ÇÑ ÇÔ¼ö¸¦ Á¤ÀÇÇÑ´Ù.
 * 3. ÀÇÁ¸¼º: string.js
 * 4. ÀÛ¼ºÀÚ: 
 * 5. ÀÛ¼ºÀÏ: 2006.10.10.
 -------------------------------------------------------------------*/



/**
 * ´­¸° Å°°¡ Control KeyÀ̸é true, ¾Æ´Ï¸é false
 */
function isControlKey() {
	var key = event.keyCode;

	return (
		   key ==   8  // <BS>
		|| key ==   9  // <Tab>
		|| key ==  13  // <Enter>
		|| key ==  35  // <End>
		|| key ==  36  // <Home>
		|| key ==  37  // <¡ç>
		|| key ==  39  // <¡æ>
		|| key ==  46  // <Del>
		|| key == 144  // <NumLock>
	);
}


/**
 * ´­¸°Å°°¡ ¼ýÀÚÅ°¸é true, ¾Æ´Ï¸é false
 */
function isDigitKey() {
	var key = event.keyCode;

	return ( key >= 48 && key <= 57 ) || ( key >= 96 && key <= 105 );
}


/**
 * ´­¸°Å°°¡ Ư¼ö¹®ÀÚÅ°À̸é true, ¾Æ´Ï¸é false;
 */
function isSpecialCharKey() {

}


/**
 * ¼ýÀÚ¸¸ ÀÔ·ÂµÇ°Ô ÇÑ´Ù.
 */
function limitAsDigit() {
	event.returnValue = isControlKey() || isDigitKey();
}


/**
 * Á¤¼ö¸¸ ÀԷ¹ްíÀÚ ÇÏ´Â °æ¿ìÀÇ onKeyDownÀ̺¥Æ® Çڵ鷯
 */
function limitAsInt(limit) {
	if ( isControlKey() ) {
		event.returnValue = true;
		return ;
	}

	var key = event.keyCode;
	var str = event.srcElement.value;

	var intLengthValid = true;

	// Á¤¼ö ÀÚ¸®¼ö°¡ á´ÂÁö °Ë»çÇÏ¿© áÀ¸¸é
	// ´õ ÀÌ»ó ÀÔ·ÂÇÒ ¼ö ¾ø°Ô ÇÑ´Ù. ÀÌ ¶§ ÀÚ¸´¼ö¿¡¼­
	// ¾Õ¿¡ ¾çÀ½ ±âÈ£(+/-)´Â Á¦ÇÑ´Ù.
	if ( limit != undefined ) {
		var intLength = removeChar(str, ',').length;
		if ( str.charAt(0) == '-' || str.charAt(0) == '+' ) {
			intLength--;
		}

		intLengthValid = intLength < limit;
	}

	event.returnValue = intLengthValid && (
		isDigitKey()
		|| key == 189 || key == 109 // <->
	);
}


/**
 * ¾çÀÇ Á¤¼ö¸¸ ÀԷ¹ްíÀÚ ÇÏ´Â °æ¿ìÀÇ onKeyDownÀ̺¥Æ® Çڵ鷯
 */
function limitAsPlusInt(limit) {
	if ( isControlKey() ) {
		event.returnValue = true;
		return ;
	}

	var key = event.keyCode;
	var str = event.srcElement.value;

	var intLengthValid = true;

	// Á¤¼ö ÀÚ¸®¼ö°¡ á´ÂÁö °Ë»çÇÏ¿© áÀ¸¸é
	// ´õ ÀÌ»ó ÀÔ·ÂÇÒ ¼ö ¾ø°Ô ÇÑ´Ù.
	if ( limit != undefined ) {
		intLengthValid = removeChar(str, ',').length < limit;
	}

	event.returnValue = intLengthValid && isDigitKey();
}


/**
 * ½Ç¼ö¸¦ ÀԷ¹ްíÀÚ ÇÏ´Â °æ¿ìÀÇ onKeyDownÀ̺¥Æ® Çڵ鷯
 */
function limitAsFloat(limit) {
	if ( isControlKey() ) {
		event.returnValue = true;
		return ;
	}

	var str = event.srcElement.value;
	var key = event.keyCode;

	var dotNoValid = true;

	// ¼Ò¼ýÁ¡ ÀÚ¸®¼ö°¡ á´ÂÁö °Ë»çÇÏ¿© áÀ¸¸é
	// ´õ ÀÌ»ó ÀÔ·ÂÇÒ ¼ö ¾ø°Ô ÇÑ´Ù.
	if ( limit != undefined ) {
		var dotIndex = str.lastIndexOf('.');

		if ( dotIndex > -1 ) {
			dotNoValid = str.length - dotIndex - 1 < limit;
		}
	}

	var dotValid = true;

	// ¼Ò¼ýÁ¡ÀÌ ÀÌ¹Ì ÂïÇûÀ¸¸é ¼Ò¼ýÁ¡Àº ´õ ÂïÁö ¸øÇÏ°Ô ÇÑ´Ù.
	if ( str.indexOf('.') > -1 && ( key == 190 || key == 229 ) ) {
		dotValid = false;
	}

	event.returnValue = dotValid && dotNoValid && (
		isDigitKey()
		|| key == 189 || key == 109 // <->
		|| key == 190 || key == 229 || key == 110 // <.>
	);
}


/**
 * ¾çÀÇ ½Ç¼ö¸¦ ÀԷ¹ްíÀÚ ÇÏ´Â °æ¿ìÀÇ onKeyDownÀ̺¥Æ®
 */
function limitAsPlusFloat(limit) {
	if ( isControlKey() ) {
		event.returnValue = true;
		return ;
	}

	var str = event.srcElement.value;
	var key = event.keyCode;

	var dotNoValid = true;

	// ¼Ò¼ýÁ¡ ÀÚ¸®¼ö°¡ á´ÂÁö °Ë»çÇÏ¿© áÀ¸¸é
	// ´õ ÀÌ»ó ÀÔ·ÂÇÒ ¼ö ¾ø°Ô ÇÑ´Ù.
	if ( limit != undefined ) {
		var dotIndex = str.lastIndexOf('.');

		if ( dotIndex > -1 ) {
			dotNoValid = str.length - dotIndex - 1 < limit;
		}
	}

	var dotValid = true;

	// ¼Ò¼ýÁ¡ÀÌ ÀÌ¹Ì ÂïÇûÀ¸¸é ¼Ò¼ýÁ¡Àº ´õ ÂïÁö ¸øÇÏ°Ô ÇÑ´Ù.
	if ( str.indexOf('.') > -1 && ( key == 190 || key == 229 ) ) {
		dotValid = false;
	}

	event.returnValue = dotValid && dotNoValid && (
		 isDigitKey()
		|| key == 190 || key == 229 || key == 110 // <.>
	);
}

/**
 * Çѱ۰ú ½ºÆäÀ̽º Key¸¸ Çã¿ëÇÑ´Ù.
 */
function limitAsHangul() {
	if ( isControlKey() ) {
		event.returnValue = true;
		return ;
	}

	var key = event.keyCode;

	event.returnValue = (
		key == 32      // ½ºÆäÀ̽ºÅ°
		|| key == 229  // ÇѱÛÅ°. ±Ùµ¥ ¿Ö ÇѱÛÀº ¹«Á¶°Ç 229Àϱî?
	);
}


/**
 * Çѱ۰ú ¼ýÀÚ, ½ºÆäÀ̽º Key¸¸ Çã¿ëÇÑ´Ù.
 */
function limitAsHangulAndNo() {
	if ( isControlKey() ) {
		event.returnValue = true;
		return ;
	}

	var key = event.keyCode;

	event.returnValue = isDigitKey() || (
		key == 32      // ½ºÆäÀ̽ºÅ°
		|| key == 229  // ÇѱÛÅ°. ±Ùµ¥ ¿Ö ÇѱÛÀº ¹«Á¶°Ç 229Àϱî?
	);
}