wait.js

/*
 * Wait Until Exists Version v0.2 - http://javascriptisawesome.blogspot.com/
 *
 *
 * TERMS OF USE - Wait Until Exists
 * 
 * Open source under the BSD License. 
 * 
 * Copyright © 2011 Ivan Castellanos
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 * 
 * Redistributions of source code must retain the above copyright notice, this list of 
 * conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, this list 
 * of conditions and the following disclaimer in the documentation and/or other materials 
 * provided with the distribution.
 * 
 * Neither the name of the author nor the names of contributors may be used to endorse 
 * or promote products derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 *  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 
 * OF THE POSSIBILITY OF SUCH DAMAGE. 
 *
*/


(function(){
    var _waitUntilExists = {
        pending_functions : [],
        loop_and_call : function()
        {
            if(!_waitUntilExists.pending_functions.length){return}
            for(var i=0;i<_waitUntilExists.pending_functions.length;i++)
            {    
                var obj = _waitUntilExists.pending_functions[i];
                var resolution = document.getElementById(obj.id);
                if(obj.id == document){
                    resolution = document.body;
                }
                if(resolution){
                    var _f = obj.f;
                    _waitUntilExists.pending_functions.splice(i, 1)
                    if(obj.c == "itself"){obj.c = resolution}
                    _f.call(obj.c)                            
                    i--                    
                }
            }
        },
        global_interval : setInterval(function(){_waitUntilExists.loop_and_call()},5)
    }
    if(document.addEventListener){
        document.addEventListener("DOMNodeInserted", _waitUntilExists.loop_and_call, false);
        clearInterval(_waitUntilExists.global_interval);
    }
    window.waitUntilExists = function(id,the_function,context){
        context = context || window
        if(typeof id == "function"){context = the_function;the_function = id;id=document}
        _waitUntilExists.pending_functions.push({f:the_function,id:id,c:context})
    }
    waitUntilExists.stop = function(id,f){
        for(var i=0;i<_waitUntilExists.pending_functions.length;i++){
            if(_waitUntilExists.pending_functions[i].id==id && (typeof f == "undefined" || _waitUntilExists.pending_functions[i].f == f))
            {
                _waitUntilExists.pending_functions.splice(i, 1)
            }
        }
    }
    waitUntilExists.stopAll = function(){
        _waitUntilExists.pending_functions = []
    }
})()