// FontChanger
// Copyright (c) 2007 Hirotaka Ogawa
// REQUIRES: prototype.js, cookiemanager.js

FontChanger = Class.create();

FontChanger.prototype = {
  id: null,
  cookieManager: null,
  cookieName: 'body.style.fontSize',
  initialize: function(id) {
    this.id = id || 'fontChanger';
    this.cookieManager = new CookieManager();
    this.cookieManager.cookieShelfLife = 90;
    var fontSize = this.cookieManager.getCookie(this.cookieName);
    if (fontSize) document.body.style.fontSize = fontSize;
  },
  setCookieShelfLife: function(days) {
    this.cookieManager.cookieShelfLife = days;
  },
  change: function(fontSize) {
    document.body.style.fontSize = fontSize;
    this.cookieManager.setCookie(this.cookieName, fontSize);
  },
  reset: function() {
    document.body.style.fontSize = '';
    this.cookieManager.clearCookie(this.cookieName);
  },
  show: function() {
    var id = this.id;    
    document.writeln([
    '<div align="right" class="MainCont">' +
    	'<table cellspacing="0" cellpadding="0">' +
			'<tr>' +
				'<p id="' + id + '">' +
		    		'<TD align="center" width="120px" bgcolor="#7B7BFF" style="color:#FFFFFF;">文字サイズ：</td>' +
    				'<TD align="center" width="20px" bgcolor="#ABABFF" ><a href="javascript: location.reload();" id="' + id + '-small" title="文字サイズ:小"><span style="font-size=80%;">小</span></a></td>' +
    				'<TD align="center" width="20px" bgcolor="#7B7BFF" ><a href="javascript: location.reload();" id="' + id + '-medium" title="文字サイズ:標準"><span style="font-size:100%; color:#FFFFFF;">中</span></a></td>' +
    				'<TD align="center" width="20px" bgcolor="#3B3BFF" ><a href="javascript: location.reload();" id="' + id + '-large" title="文字サイズ:大"><span style="font-size:120%; color:white;">大</span></a></td>' +
				'</p>' +
			'</tr>' +
		'</table>' +    	
    '</div>'
    ].join("\n"));
    Event.observe($(id + '-small' ), 'click', this.onClickSmall.bind(this));
    Event.observe($(id + '-medium'), 'click', this.onClickMedium.bind(this));
    Event.observe($(id + '-large' ), 'click', this.onClickLarge.bind(this));
  },
  onClickSmall:  function(e) { this.change('84%' ); },
  onClickMedium: function(e) { this.change('100%'); },
  onClickLarge:  function(e) { this.change('120%'); }
};


// Bootstrap
FontChanger.start = function(id) {
  var fontChanger = new FontChanger(id);
  fontChanger.setCookieShelfLife(90);
  fontChanger.show();
};

// メニューを表示させない（文字サイズだけ反映）
FontChanger.start_nv = function(id) {
  var fontChanger = new FontChanger(id);
  fontChanger.setCookieShelfLife(90);
};