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/*
* Copyright (c) 2010 Brendon Boshell
*
* 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.
*/
/*
* Example Usage:
* IframeOnClick.track(document.getElementById("iframe"), function() { alert('click'); });
*/
var IframeOnClick = {
/*
* The period at which we scan for clicked Iframes. Should be about 200ms to be
* suitably responsive, but too small could cause browser to lock up.
*
*/
resolution: 200,
/*
* Array of iframes.
*
*/
iframes: [],
/*
* Holds a reference to setInterval for checkClick
*
*/
interval: null,
/*
* Class to represent an individual Iframe.
*
*/
Iframe: function() {
this.element = arguments[0];
this.cb = arguments[1]; // our callback function
this.hasTracked = false;
},
/*
* Call this function, passing your Iframe element and a callback function, and
* the callback function will be called when the Iframe gets clicked.
*
*/
track: function(element, cb) {
// create new 'Iframe'
this.iframes.push(new this.Iframe(element, cb));
// start tracking, if we haven't already done so.
if (!this.interval) {
var _this = this;
this.interval = setInterval(function() { _this.checkClick(); }, this.resolution);
}
},
/*
* Check each of the Iframes we are tracking for clicks...
*
*/
checkClick: function() {
if (document.activeElement) {
var activeElement = document.activeElement;
for (var i in this.iframes) {
if (activeElement === this.iframes[i].element) { // user is in this Iframe
if (this.iframes[i].hasTracked == false) { // we've not already made a call...
this.iframes[i].cb.apply(window, []); // ...call callback function
this.iframes[i].hasTracked = true;
}
} else {
this.iframes[i].hasTracked = false;
}
}
}
}
};