How to use visibilitychange event on Firefox Extensions
- by Tom S.
I'm trying to learn how to make a firefox extension. I want to create a toolbar that only shows up on a specific page. I can make the toolbar appear, but then it should become hidden when I open or switch to a new tab, or close the tab with that specific page. I don't understand how to make the visibilitychange event work though, no matter what I try nothing happens.
window.addEventListener("load", function load(event){
window.removeEventListener("load", load, false);
myExtension.init();
},false);
var myExtension = {
init: function (aEvent) {
gBrowser.addEventListener("DOMContentLoaded", this.showToolbar, false);
},
showToolbar: function(aEvent) {
var doc = aEvent.originalTarget;
if(doc.location.href=="http://www.google.ca/"){
eToolbar=document.getElementById("nav-toolbar");
eToolbar.hidden=false;
//no matter how I change this line below it never does anything
gBrowser.addEventListener("mozvisibilitychange", this.toggleToolbar, false);
}
},
toggleToolbar: function(aEvent) {
eToolbar=document.getElementById("nav-toolbar");
if(document["mozVisibilityState"]=="mozHidden"){
eToolbar.hidden=true;
} else {
eToolbar.hidden=false;
}
}
}
