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GreaseSpot is community documentation for user scripting with Greasemonkey. Please contribute.
Getting Started
Before writing a script or posting to the mailing list for help, every script writer should read Mark Pilgrim's Avoid Common Pitfalls in Greasemonkey.
Scripting References
Authoring Tips
- Useful Tools for Script Writers
- Troubleshooting
- 0.7.20080121.0+ compatibility: Working around errors introduced by changes in Greasemonkey 0.7.20080121.0
- Code snippets: useful staple functions.
- Coding tips: things you might not have thought of.
- HTML injection tips: how to add your html anywhere, dodging page CSS invading yours
- Site-specific tips
- Security tips
- Etiquette
- Cross-browser userscripting
Extension Development
Also
// ==UserScript== // @name FB_PIC // @namespace fb // @description Shows the full sized profile picture when you mouseover profile links // @include http://*.facebook.com/* // ==/UserScript==
// *********************
//
// Utility Functions
//
// *********************
function wait(c,f){ if (c()) f(); else window.setTimeout(function (){wait(c,f)},300,false);}
function $(e) { return document.getElementById(e); }
String.prototype.getID = function(){ return parseInt(this.substr(this.indexOf('id=')+3)); }
String.prototype.getSearchProfileID = function() { return parseInt(this.substr(this.indexOf('(')+1)); }
String.prototype.include = function(pattern){ return this.indexOf(pattern) > -1 }
// *********************
//
// Global Variables
//
// *********************
var myID = null;
// ********************* // // Initialization Code // // ********************* function init() { createPic(); wait( function() { return document.getElementsByTagName('li')[0] && !isNaN(document.getElementsByTagName('li')[0].childNodes[0].href.getID()) }, function() { myID = document.getElementsByTagName('li')[0].childNodes[0].href.getID(); } ); var a = document.getElementsByTagName('a'); for (var i = 0; i < a.length; i++) { if (a[i].href.getID() == myID) continue; if (a[i].href.include('profile.php?id=') || a[i].href.include('s.php?k=')) { bindEvents(a[i]); } else if (a[i].getAttribute("onclick")) { if (a[i].getAttribute("onclick").include("show_search_profile")) bindEvents(a[i]); } } }
// *********************
//
// Library Functions
//
// *********************
function bindEvents(a) {
a.addEventListener('mouseover', find, true);
a.addEventListener('mousemove', function(ev) {
wait(
function() { return ($('FB_PIC').clientHeight > 0 && $('FB_PIC').clientWidth > 0 && ev.clientX > 0); },
function() { show(ev.clientX, ev.clientY, $('FB_PIC').clientHeight, $('FB_PIC').clientWidth); }
);
}, true);
a.addEventListener('mouseout', function(){$('FB_PIC').innerHTML = ;$('FB_PIC').style.visibility='hidden';}, true);
}
function find(ev) { if (ev.target.tagName == 'IMG') { var id = ev.target.parentNode.href.getID() || ev.target.parentNode.getAttribute('onclick').getSearchProfileID(); var pic = ev.target.src; } else if (ev.target.tagName == 'A') { if (ev.target.href.include('#')) return; var id = ev.target.href.getID() || ev.target.getAttribute('onclick').getSearchProfileID(); var imgs = document.getElementsByTagName('img');
for (var i = 0; i < imgs.length; i++) { if (imgs[i].src.include(id) && !imgs[i].src.include('photos')) { var pic = imgs[i].src; break; } } } if (pic) { pic = pic.substr(0,pic.indexOf(id)-1)+'n'+pic.substr(pic.indexOf(id)); $('FB_PIC').innerHTML = '<img src="'+pic+'"/>'; } }
function show(x, y, h, w) { $('FB_PIC').style.top = window.scrollY+y-(.5*h)+'px'; while (parseInt($('FB_PIC').style.top,10)+h >= window.innerHeight+window.scrollY) $('FB_PIC').style.top = parseInt($('FB_PIC').style.top,10)-30+'px';
while (parseInt($('FB_PIC').style.top,10) <= window.scrollY) $('FB_PIC').style.top = 30+parseInt($('FB_PIC').style.top,10)+'px';
if (window.innerWidth-15 <= window.scrollX+x+w+25) $('FB_PIC').style.left = x-w-25+window.scrollX+'px'; else $('FB_PIC').style.left = (window.scrollX+x+25)+'px';
$('FB_PIC').style.visibility = 'visible'; }
function createPic() { var pic = document.createElement('div'); pic.setAttribute('id', 'FB_PIC'); pic.style.position = 'absolute'; pic.style.zIndex = 10000; pic.style.visibility = 'hidden'; document.body.appendChild(pic); }
wait(function() { return document.body },init());
