saschanaz · March 7, 2019 14:47
diff --git a/onenotefix.html b/onenotefix.html
 <!DOCTYPE html>
 <html>
 <head>
    <meta charset="utf-8" />
    <style>
      html, body {
        margin: 0;
        height: 100%;
      }
      #textarea {
        width: 800px;
        height: 100%;
      }
    </style>
 </head>
 <body>
 <textarea id="textarea">어디거쳐왔ㄷㅏ는ㄱㅓㄹ 정ㅎㅘㄱ히알수있ㅇㅡㅁ</textarea>
 <button id="button">Go</button>
 <script>
 button.addEventListener("click", () => {
  textarea.value = convert(textarea.value);
 })

 const ChoSeong = [
  0x3131, 0x3132, 0x3134, 0x3137, 0x3138, 0x3139,   
  0x3141, 0x3142, 0x3143, 0x3145, 0x3146, 0x3147,   
  0x3148, 0x3149, 0x314a, 0x314b, 0x314c, 0x314d, 0x314e   
 ];
 const JungSeong = [
  0x314f, 0x3150, 0x3151, 0x3152, 0x3153, 0x3154,   
  0x3155, 0x3156, 0x3157, 0x3158, 0x3159, 0x315a,   
  0x315b,0x315c, 0x315d, 0x315e, 0x315f, 0x3160,   
  0x3161, 0x3162, 0x3163   
 ];
 const JongSeong = [
  0x0000, 0x3131, 0x3132, 0x3133, 0x3134,0x3135,   
  0x3136, 0x3137, 0x3139, 0x313a, 0x313b, 0x313c,   
  0x313d, 0x313e, 0x313f, 0x3140, 0x3141, 0x3142,   
  0x3144, 0x3145, 0x3146, 0x3147, 0x3148, 0x314a,   
  0x314b, 0x314c, 0x314d, 0x314e   
 ];

 function convert(str) {
  const array = [];
  let cho = 0;
  let jung = 0;
  let jong = 0;
  for (const char of str) {
    const code = char.codePointAt(0);
    if (code >= 0x3131 && code <= 0x314e) { // ja
      if (cho && !jung) {
        array.push(String.fromCodePoint(cho));
        initialize();
      }
      else if (jong) {
        array.push(composeAndInitialize());
        initialize();
      }
      
      if (!jung) {
      	cho = code;
      }
      else {
        jong = code;
      }
    }
    else if (code >= 0x314f && code <= 0x3163) { // mo
      if (!cho) {
        array.push(char);
        initialize();
        continue;
      }
      if (jung && !jong) {
        array.push(composeAndInitialize());
        array.push(char);
        continue;
      }
      if (jong) {
        array.push(compose(ChoSeong.indexOf(cho), JungSeong.indexOf(jung), 0));
        cho = jong;
        jung = jong = 0;
      }
      jung = code;
    }
    else {
      if (cho) {
        if (jung) {
          array.push(composeAndInitialize())
        }
        else {
          array.push(String.fromCodePoint(cho));
          initialize();
        }
      } 
      array.push(char);
    }
  }
  if (cho) {
    if (jung) {
      array.push(composeAndInitialize())
    }
    else {
      array.push(String.fromCodePoint(cho));
      initialize();
    }
  }
  
  return array.join('');
  
  function composeAndInitialize() {
    const result = compose(ChoSeong.indexOf(cho), JungSeong.indexOf(jung), jong && JongSeong.indexOf(jong));
    initialize();
    return result;
  }
  function initialize() {
    cho = jung = jong = 0;
  }
  function compose(cho, jung, jong) {
     return String.fromCodePoint(0xAC00 + 28 * 21 * cho + 28 * jung + jong);
  }
 }
 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8" />
	<style>
	html, body {
	margin: 0;
	height: 100%;
	}
	#textarea {
	width: 800px;
	height: 100%;
	}
	</style>
	</head>
	<body>
	<textarea id="textarea">어디거쳐왔ㄷㅏ는ㄱㅓㄹ 정ㅎㅘㄱ히알수있ㅇㅡㅁ</textarea>
	<button id="button">Go</button>
	<script>
	button.addEventListener("click", () => {
	textarea.value = convert(textarea.value);
	})

	const ChoSeong = [
	0x3131, 0x3132, 0x3134, 0x3137, 0x3138, 0x3139,
	0x3141, 0x3142, 0x3143, 0x3145, 0x3146, 0x3147,
	0x3148, 0x3149, 0x314a, 0x314b, 0x314c, 0x314d, 0x314e
	];
	const JungSeong = [
	0x314f, 0x3150, 0x3151, 0x3152, 0x3153, 0x3154,
	0x3155, 0x3156, 0x3157, 0x3158, 0x3159, 0x315a,
	0x315b,0x315c, 0x315d, 0x315e, 0x315f, 0x3160,
	0x3161, 0x3162, 0x3163
	];
	const JongSeong = [
	0x0000, 0x3131, 0x3132, 0x3133, 0x3134,0x3135,
	0x3136, 0x3137, 0x3139, 0x313a, 0x313b, 0x313c,
	0x313d, 0x313e, 0x313f, 0x3140, 0x3141, 0x3142,
	0x3144, 0x3145, 0x3146, 0x3147, 0x3148, 0x314a,
	0x314b, 0x314c, 0x314d, 0x314e
	];

	function convert(str) {
	const array = [];
	let cho = 0;
	let jung = 0;
	let jong = 0;
	for (const char of str) {
	const code = char.codePointAt(0);
	if (code >= 0x3131 && code <= 0x314e) { // ja
	if (cho && !jung) {
	array.push(String.fromCodePoint(cho));
	initialize();
	}
	else if (jong) {
	array.push(composeAndInitialize());
	initialize();
	}

	if (!jung) {
	cho = code;
	}
	else {
	jong = code;
	}
	}
	else if (code >= 0x314f && code <= 0x3163) { // mo
	if (!cho) {
	array.push(char);
	initialize();
	continue;
	}
	if (jung && !jong) {
	array.push(composeAndInitialize());
	array.push(char);
	continue;
	}
	if (jong) {
	array.push(compose(ChoSeong.indexOf(cho), JungSeong.indexOf(jung), 0));
	cho = jong;
	jung = jong = 0;
	}
	jung = code;
	}
	else {
	if (cho) {
	if (jung) {
	array.push(composeAndInitialize())
	}
	else {
	array.push(String.fromCodePoint(cho));
	initialize();
	}
	}
	array.push(char);
	}
	}
	if (cho) {
	if (jung) {
	array.push(composeAndInitialize())
	}
	else {
	array.push(String.fromCodePoint(cho));
	initialize();
	}
	}

	return array.join('');

	function composeAndInitialize() {
	const result = compose(ChoSeong.indexOf(cho), JungSeong.indexOf(jung), jong && JongSeong.indexOf(jong));
	initialize();
	return result;
	}
	function initialize() {
	cho = jung = jong = 0;
	}
	function compose(cho, jung, jong) {
	return String.fromCodePoint(0xAC00 + 28 * 21 * cho + 28 * jung + jong);
	}
	}
	</script>
	</body>
	</html>