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Enable user-specific, cookie-based storage of context collapse/expand settings on the homepage. Also, removed unused cookie get/set code from the toggle_notes.js file

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git-svn-id: http://www.rousette.org.uk/svn/tracks-repos/trunk@262 a4c988fc-2ded-0310-b66e-134b36920a42
This commit is contained in:
lukemelia 2006-06-10 17:09:16 +00:00
parent cf0d56e10b
commit da22d34962
4 changed files with 221 additions and 136 deletions
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124
tracks/public/javascripts/application.js
View file

@ -7,4 +7,126 @@ Ajax.Responders.register({
if($('busy') && Ajax.activeRequestCount==0)
Element.hide('busy');
}
});
});
/**
* Provides a simple interface for creating, retrieving and clearing cookies.
* Adapted from Jonathan Buchanan's code at http://insin.woaf.net/code/javascript/cookiemanager.html
*/
CookieManager = Class.create();
CookieManager.prototype =
{
BROWSER_IS_IE:
(document.all
&& window.ActiveXObject
&& navigator.userAgent.toLowerCase().indexOf("msie") > -1
&& navigator.userAgent.toLowerCase().indexOf("opera") == -1),
/**
* I hate navigator string based browser detection too, but when Opera alone
* chokes on cookies containing double quotes...
*/
BROWSER_IS_OPERA:
(navigator.userAgent.toLowerCase().indexOf("opera") != -1),
initialize: function(options)
{
this.options = Object.extend({
shelfLife: 365,
userData: false
}, options || {});
this.cookieShelfLife = this.options.shelfLife;
this.userDataForIE = this.options.userData;
// Internet Explorer has a cookie handling bug - if the *combined size*
// of all cookies stored for a given domain is greater than 4096 bytes,
// document.cookie will return an empty string. Until this is fixed, we
// can fall back on IE's proprietary userData behaviour if necessary.
if (this.BROWSER_IS_IE && this.userDataForIE)
{
this.IE_CACHE_NAME = "storage";
if ($(this.IE_CACHE_NAME) == null)
{
var div = document.createElement("DIV");
div.id = this.IE_CACHE_NAME;
document.body.appendChild(div);
}
this.store = $(this.IE_CACHE_NAME);
this.store.style.behavior = "url('#default#userData')";
}
},
/**
* Returns the value of a cookie with the given name, or <code>null</code>
* if no such cookie exists.
*/
getCookie: function(aCookieName)
{
var result = null;
if (this.BROWSER_IS_IE && this.userDataForIE)
{
this.store.load(this.IE_CACHE_NAME);
result = this.store.getAttribute(aCookieName);
}
else
{
for (var i = 0; i < document.cookie.split('; ').length; i++)
{
var crumb = document.cookie.split('; ')[i].split('=');
if (crumb[0] == aCookieName && crumb[1] != null)
{
result = crumb[1];
break;
}
}
}
if (this.BROWSER_IS_OPERA && result != null)
{
result = result.replace(/%22/g, '"');
}
return result;
},
/**
* Sets a cookie with the given name and value.
*/
setCookie: function(aCookieName, aCookieValue)
{
if (this.BROWSER_IS_IE && this.userDataForIE)
{
this.store.setAttribute(aCookieName, aCookieValue);
this.store.save(this.IE_CACHE_NAME);
}
else
{
if (this.BROWSER_IS_OPERA)
{
aCookieValue = aCookieValue.replace(/"/g, "%22");
}
var date = new Date();
date.setTime(date.getTime() + (this.cookieShelfLife * 24*60*60*1000));
var expires = '; expires=' + date.toGMTString();
document.cookie = aCookieName + '=' + aCookieValue + expires + '; path=/';
}
},
/**
* Clears the cookie with the given name.
*/
clearCookie: function(aCookieName)
{
if (this.BROWSER_IS_IE && this.userDataForIE)
{
this.store.load(this.IE_CACHE_NAME);
this.store.removeAttribute(aCookieName);
this.store.save(this.IE_CACHE_NAME);
}
else
{
document.cookie =
aCookieName + '=;expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/';
}
}
}