/*
 * IFrame Loader Plugin for JQuery
 * - Notifies your event handler when iframe has finished loading
 * - Your event handler receives loading duration (as well as iframe)
 * - Optionally calls your timeout handler
 *
 * http://project.ajaxpatterns.org/jquery-iframe
 *
 * The MIT License
 *
 * Copyright (c) 2009, Michael Mahemoff
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

(function($) {

  var timer;

  $.fn.src = function(url, onLoad, options) {
    setIFrames($(this), onLoad, options, function() {
      this.src = url;
    });
    return $(this);
  }

  $.fn.squirt = function(content, onLoad, options) {

    setIFrames($(this), onLoad, options, function() {
      var doc = this.contentDocument || this.contentWindow.document;
      doc.open();
      doc.writeln(content);
      doc.close();
    });
    return this;

  }

  function setIFrames(iframes, onLoad, options, iFrameSetter) {
    iframes.each(function() {
      if (this.tagName=="IFRAME") setIFrame(this, onLoad, options, iFrameSetter);
    });
  }

  function setIFrame(iframe, onLoad, options, iFrameSetter) {

    var iframe;
    iframe.onload = null;
    if (timer) clearTimeout(timer);

    var defaults = {
      timeoutDuration: 0,
      timeout: null,
    }
    var opts = $.extend(defaults, options);
    if (opts.timeout && !opts.timeoutDuration) opts.timeoutDuration = 60000;

    opts.frameactive = true;
    var startTime = (new Date()).getTime();
    if (opts.timeout) {
      var timer = setTimeout(function() {
        opts.frameactive=false; 
        iframe.onload=null;
        if (opts.timeout) opts.timeout(iframe, opts.timeout);
      }, opts.timeoutDuration);
    };

    var onloadHandler = function() {
      var duration=(new Date()).getTime()-startTime;
      if (timer) clearTimeout(timer);
      if (onLoad && opts.frameactive) onLoad.apply(iframe,[duration]);
      opts.frameactive=false;
    }
    iFrameSetter.apply(iframe);
    iframe.onload = onloadHandler;
    opts.completeReadyStateChanges=0;
    iframe.onreadystatechange = function() { // IE ftw
	    if (++(opts.completeReadyStateChanges)==3) onloadHandler();
    }

    return iframe;

  };

})(jQuery);