// ==UserScript==
// @name           Remove Google LeftNav
// @namespace      http://mibai.tec.u-ryukyu.ac.jp/

// @description    Remove (fold) left navi column from google result.
// @include        http://www.google.co.jp/search*
// ==/UserScript==

// [2010/05/07] OSHIRO Naoki. Add fold button
// [2010/05/06] OSHIRO Naoki. 

// 以下などを参考にしました。
// http://d.hatena.ne.jp/f96q/20100203/1265186427

//  CSSを編集するGreasemonkeyスクリプト - がむしゃらにコードを書き続けるブログ

function scrollLeftNav() {
    var s=document.getElementById('fold_leftnav').style;
    var y=window.scrollY;
    if(y<93){s.top=(95-y)+'px'}else{s.top='2px'}
}
document.body.setAttribute('onScroll','('+scrollLeftNav+')()');

(function() {
        function toggleLeftNav(state) {
          if (state==true || leftnav.style.display!='none') {
              leftnav.style.display = "none";
              center_col.style.marginLeft = "0px";
              foot.style.marginLeft = "auto";
              fold_button.innerHTML = '&raquo;';
          } else {
              leftnav.style.display = "inline";
              center_col.style.marginLeft = "160px";
              foot.style.marginLeft = "200px";
              fold_button.innerHTML = '&laquo;';
          }
        }

        // search leftnav element
	var leftnav = document.getElementById("leftnav");
        if (!leftnav) return;

        var center_col = document.getElementById("center_col");
        var foot = document.getElementById("foot")

        with (leftnav.style) {
// default: padding-top: 3px; padding-left: 4px; position: absolute; top: 0pt; width: 151px;
	 display = 'none';
         position = 'relative';
         //marginTop = '0px';
         //marginLeft = '0px';
	 paddingTop = '0px';
	 paddingLeft = '0px';
         top = '5px';
         //left = '-10px';
        }
        with (center_col.style) {
          marginRight = "0px";
        }
        with (foot.style) {
	  marginRight = "auto";
          maxWidth = "60%";
        }

        // add fold button
        var fold_button = document.createElement('span');
        //var fold_button = document.createElement('button');
        fold_button.innerHTML = '&raquo;';
        with (fold_button.style) {
          padding = '1px 2px'; 
          border = 'solid 1px #a8b6fd'; 
	  userSelect = 'none';
          color = 'blue';
        }
        fold_button.setAttribute('id','fold_button');
        fold_button.setAttribute('onMouseDown','return false');
        fold_button.addEventListener('click',toggleLeftNav,false);

        var fold_leftnav = document.createElement('span');
        leftnav.parentNode.appendChild(fold_leftnav);
        with (fold_leftnav.style) {
	  paddingTop = '3px';
	  paddingLeft = '3px';
          if (false) { // ページの上部に表示
            position = 'absolute';
            top = '-22px';
          } else { // 浮かせる
            position = 'fixed';
            top = '95px';
          }
        }
        fold_leftnav.setAttribute('id','fold_leftnav');
        fold_leftnav.appendChild(fold_button);
        fold_leftnav.appendChild(leftnav);

	toggleLeftNav(true);

        if (true) { // 結果概要の幅を広げて、右側の広告も消す？
	var css_list = document.styleSheets;
	if (css_list) for (var i = 0; i <css_list.length; i++) {
		var rule_list = (css_list[i].cssRules) ? css_list[i].cssRules : css_list[i].rules;

		for (var ii = 0; ii <rule_list.length; ii++)
			if (rule_list[ii].selectorText.toLowerCase().match(".s"))
				with (rule_list[ii].style) {maxWidth = '100%';}
	}
        with (document.getElementById("rhs").style) {
	  display = 'none';
        }
        }
})();