// ==UserScript==
// @name           Delete Multiple Subscriptions
// @namespace      http://afunamatata.com/greasemonkey/
// @description    Reload the page only after deleting all subscriptions, not after each deletion
// @include http://www.dreamwidth.org/manage/settings/?cat=notifications*
// @tags           dreamwidth
// ==/UserScript==

function markForDeletion(event)
{
    str = this.href.substr(deletebutton.getAttribute("original_url_length"));
    if(this.getAttribute("toDelete")=="true")
    {
        // delete
        myvar.splice(myvar.indexOf(str),1);
        this.style.border = 'none';
    }
    else
    {
        // don't delete
        myvar.push(str);
        this.style.border='1px solid red';
        
    }
    this.setAttribute("toDelete", this.getAttribute("toDelete") == "true" ? "false" : "true");
    var href = "http://"+document.location.hostname+document.location.pathname+"?cat=notifications&"+myvar.join("&");
    deletebutton.setAttribute("delete_vars", href);
    deletebutton.setAttribute("title", href);
    event.preventDefault();
    event.stopPropagation();
}

myvar = new Array();
xpath = document.evaluate("//img[contains(@src,'img/portal/btn_del.gif')]/parent::*", document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
for(i = 0; i < xpath.snapshotLength; ++i) { 
    a = xpath.snapshotItem(i);
    a.setAttribute("toDelete", "false");
    a.addEventListener('click', markForDeletion,false);
}

var container = document.getElementById("settings_save");

deletebutton = document.createElement("button");
deletebutton.addEventListener( "click", function(event) {
    event.preventDefault();
    event.stopPropagation();
    document.location = this.getAttribute("delete_vars");
}, false);
deletebutton.innerHTML= "Delete";
deletebutton.setAttribute("delete_vars", "http://"+document.location.hostname+document.location.pathname+"/?cat=notifications");
deletebutton.setAttribute("original_url_length", ("http://"+document.location.hostname+document.location.pathname+"/?cat=notifications").length);
deletebutton.setAttribute("class", "deletebutton");
container.appendChild(deletebutton);

GM_addStyle("a.deletebutton { text-decoration:none; text-align: center; padding: 1px 5px; \n\
background-color: #eee; border: 2px solid gray; border-top-color: white; border-left-color: white; color: black;}");