// Copyright (c) 2008 ichi (http://ichi.fool.jp/memo/)
// 
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
(function($){
	
	$.fn.autoKana = function(target, config){
		config = $.extend({
			katakana: true
		}, config);
		
		var $this = this,
		    $target = $(target),
		    timer;
		
		var kana_extraction_pattern = new RegExp('[^ 　ぁあ-んー]', 'g'),
		    kana_compacting_pattern = new RegExp('[ぁぃぅぇぉっゃゅょ]', 'g');
		
		var baseKana     = '',
		    flagConvert  = false,
		    ignoreString = '',
		    input        = '',
		    values       = [];
		
		
		var _stateClear = function(){
			baseKana     = '';
			flagConvert  = false;
			ignoreString = '';
			input        = '';
			values       = [];
		};
		var _stateInput = function() {
			baseKana     = $target.val();
			flagConvert  = false;
			ignoreString = $this.val();
		};
		var _stateConvert = function() {
			baseKana     = baseKana + values.join('');
			flagConvert  = true;
			values       = [];
		};
		
		var _setInterval = function() {
			timer = setInterval(_checkValue, 30);
		};
		var _clearInterval = function() {
			clearInterval(timer);
		};
		
		var _checkConvert = function(new_values) {
			if(!flagConvert) {
				if(Math.abs(values.length - new_values.length) > 1) {
					var tmp_values = new_values.join('').replace(kana_compacting_pattern, '').split('');
					if(Math.abs(values.length - tmp_values.length) > 1) {
						_stateConvert();
					}
				} else {
					if(values.length == input.length && values.join('') != input) {
						_stateConvert();
					}
				}
			}
		};
		var _checkValue = function() {
			var new_input = $this.val(),
			    new_values;
			
			if(new_input == '') {
				_stateClear();
				_setKana();
			}else{
				new_input = _removeString(new_input);
				if(input == new_input) {
					return;
				}else{
					input = new_input;
					if(!flagConvert) {
						new_values = new_input.replace(kana_extraction_pattern, '').split('');
						_checkConvert(new_values);
						_setKana(new_values);
					}
				}
			}
		};
		
		var _setKana = function(new_values) {
			if(!flagConvert) {
				if(new_values) {
					values = new_values;
				}
				$target.val(_toKatakana(baseKana + values.join('')));
			}
		};
		
		var _removeString = function(new_input) {
			if(new_input.match(ignoreString)) {
				return new_input.replace(ignoreString, '');
			}else{
				var ignoreArray = ignoreString.split(''),
				    inputArray = new_input.split('');
				for(var i = 0, iL = ignoreArray.length; i <iL; i++){
					if(ignoreArray[i] == inputArray[i]) {
						inputArray[i] = '';
					}
				}
				return inputArray.join('');
			}
		};
		
		var _isHiragana = function(c) {
			return ((c >= 12353 && c <= 12435) || c == 12445 || c == 12446);
		};
		
		var _toKatakana = function(src) {
			if(config.katakana){
				var c,
				    str = new String;
				for(var i = 0, iL = src.length; i < iL; i++) {
					c = src.charCodeAt(i);
					if(_isHiragana(c)) {
						str += String.fromCharCode(c + 96);
					}else{
						str += src.charAt(i);
					}
				}
				return str;
			}else{
				return src;
			}
		};
		
		
		return $this
			.blur(function(e){
				_clearInterval();
			})
			.focus(function(e){
				_stateInput();
				_setInterval();
			})
			.keyup(function(e){
				if(flagConvert) {
					_stateInput();
				}
			});
	};
	
})(jQuery);


/* カタカナ */
$(function(){
	$("#fname_1st").autoKana("#fkana_1st");
	$("#fname_2nd").autoKana("#fkana_2nd");
});

/* ひらがな */
/*$(function(){
	$("#fname_1st").autoKana("#fkana_1st");
	$("#fname_2nd").autoKana("#fkana_2nd" , {katakana:false});
});*/