// Access Bar
// version 0.9 BETA!
// 2005-05-02
// Copyright (c) 2005, Mark Pilgrim
// Released under the GPL license
// http://www.gnu.org/copyleft/gpl.html
//
// --------------------------------------------------------------------
//
// This is a Greasemonkey user script.  To install it, you need
// Greasemonkey 0.3 or later: http://greasemonkey.mozdev.org/
// Then restart Firefox and revisit this script.
// Under Tools, there will be a new menu item to "Install User Script".
// Accept the default configuration and install.
//
// To uninstall, go to Tools/Manage User Scripts,
// select "Access Bar", and click Uninstall.
//
// --------------------------------------------------------------------
//
// ==UserScript==
// @name          Access Bar
// @namespace     http://diveintomark.org/projects/greasemonkey/
// @description   show accesskeys defined on page
// @include       *
// ==/UserScript==

function addGlobalStyle(css) {
    var head, style;
    head = document.getElementsByTagName('head')[0];
    if (!head) { return; }
    style = document.createElement('style');
    style.type = 'text/css';
    style.innerHTML = css;
    head.appendChild(style);
}

var akeys, descriptions, a, desc, label, div;
akeys = document.evaluate(
    "//*[@accesskey]",
    document,
    null,
    XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,
    null);
if (!akeys.snapshotLength) { return; }
descriptions = new Array();
desc = '';
for (var i = 0; i < akeys.snapshotLength; i++) {
    a = akeys.snapshotItem(i);
    desctext = '';
    if (a.nodeName == 'INPUT') {
        label = document.evaluate("//label[@for='" + a.name + "']",
            document,
	    null,
	    XPathResult.FIRST_ORDERED_NODE_TYPE,
            null).singleNodeValue;
        if (label) {
            desctext = label.title;
            if (!desctext) { desctext = label.textContent; }
        }
    }
    if (!desctext) { desctext = a.textContent; }
    if (!desctext) { desctext = a.title; }
    if (!desctext) { desctext = a.name; }
    if (!desctext) { desctext = a.id; }
    if (!desctext) { desctext = a.href; }
    if (!desctext) { desctext = a.value; }
    desc = '<strong>[' +
	a.getAttribute('accesskey').toUpperCase() + ']</strong> ';
    if (a.href) {
	desc += '<a href="' + a.href + '">' + desctext + '</a>';
    } else {
	desc += desctext;
    }
    descriptions.push(desc);
}
descriptions.sort();
div = document.createElement('div');
div.id = 'accessbar-div-0';
desc = '<div><ul><li class="first">' + descriptions[0] + '</li>';
for (var i = 1; i < descriptions.length; i++) {
    desc = desc + '<li>' + descriptions[i] + '</li>';
}
desc = desc + '</ul></div>';
div.innerHTML = desc;
document.body.style.paddingBottom = "4em";
window.addEventListener(
    "load",
    function() {
        document.body.appendChild(div);
    },
    true);
addGlobalStyle(
'#accessbar-div-0 {'+
'  position: fixed;' +
'  left: 0;' +
'  right: 0;' +
'  bottom: 0;' +
'  top: auto;' +
'  border-top: 1px solid silver;' +
'  background: black;' +
'  color: white;' +
'  margin: 1em 0 0 0;' +
'  padding: 5px 0 0.4em 0;' +
'  width: 100%;' +
'  font-family: Verdana, sans-serif;' +
'  font-size: small;' +
'  line-height: 160%;' +
'}' +
'#accessbar-div-0 a,' +
'#accessbar-div-0 li,' +
'#accessbar-div-0 span,' +
'#accessbar-div-0 strong {' +
'  background-color: transparent;' +
'  color: white;' +
'}' +
'#accessbar-div-0 div {' +
'  margin: 0 1em 0 1em;' +
'}' +
'#accessbar-div-0 div ul {' +
'  margin-left: 0;' +
'  margin-bottom: 5px;' +
'  padding-left: 0;' +
'  display: inline;' +
'}' +
'#accessbar-div-0 div ul li {' +
'  margin-left: 0;' +
'  padding: 3px 15px;' +
'  border-left: 1px solid silver;' +
'  list-style: none;' +
'  display: inline;' +
'}' +
'#accessbar-div-0 div ul li.first {' +
'  border-left: none;' +
'  padding-left: 0;' +
'}');

//
// ChangeLog
// 2005-04-30 - 0.9 - MAP - remove anon function wrapper, require GM 0.3
// 2005-04-30 - 0.8 - MAP - use built-in sort function
// 2005-04-21 - 0.7 - MAP - linted
// 2005-04-21 - 0.6 - MAP - change addGlobalStyle and quicksort to normal functions
// 2005-04-18 - 0.5 - MAP - change order of steps, tidy code
// 2005-04-16 - 0.4 - MAP - remove count(//*[@accesskey]) call, just check length of //*[@accesskey] XPath query result
// 2005-04-15 - 0.3 - MAP - changed addGlobalStyle function to check for <head> element
// 2005-04-14 - 0.2 - MAP - changed addGlobalStyle function to use local variables
//