I am creating an extension for Firefox. This includes using self.port. Here's my code in panel.js:
self.port.on("showDlg", function(val) {
document.getElementById('queen').onclick = function(){
self.port.emit("song", 'queen');
};
document.getElementById('beatles').onclick = function(){
self.port.emit("song", 'beatles');
};
});
Here's the content.js:
self.port.on("song", function(val) {
if (val.code = 'queen'){
interval = setInterval(function () {
console.log('show must go on');
}, 1000);
} else if (val.code == 'beatles'){
interval = setInterval(function () {
console.log('yesterday');
}, 1000);
}
}
It is all working, when I click queen, it prints me show must go on every 1 second. But when I click beatles, it still prints show must go on along with yesterday.
How can I stop previous interval? As far as I understand, it runs in the background, and every action is a new instance. If so, how can I stop previous instance?
Thanks.
self.port.on("song", function(val) {
self.interval && clearInterval(self.interval);
self.interval = null;
if (val.code = 'queen'){
self.interval = setInterval(function () {
console.log('show must go on');
}, 1000);
} else if (val.code == 'beatles'){
self.interval = setInterval(function () {
console.log('yesterday');
}, 1000);
}
}
Related
I'm trying to perform some action on window scroll event but it is not working.
Here is my code
$(window).scroll(function () {
// var limit = 7; //The number of records to display per request
var lastID = $newsfeed_start;
if (($(window).scrollTop() == $(document).height() - $(window).height()&& (lastID != 0)) {
// increment strat value
$newsfeed_start = $newsfeed_start + $newsfeed_limit;
get_timeline_post('');
}
});
even $(window).scroll(function () { } ) function is not working
Your CSS is actually setting the rest of the document to not show overflow therefore the document itself isn't scrolling. The easiest fix for this is bind the event to the thing that is scrolling, which in your case is div#page.
So its easy as changing:
$(document).scroll(function() { // OR $(window).scroll(function() {
didScroll = true;
});
to
$('div#page').scroll(function() {
didScroll = true;
});
This is the scenario I want:
I'm checking for the presence of an application (using protocol detection), if it's not present the exe file automatically starts downloading. The webpage continuously checks in regular interval whether the app has been successfully downloaded and when the installation is complete, the browser prompts to open the app.
What is working:
The download is starting automatically. The webpage is checking for the presence of the app in regular interval.
What is NOT working:
After the exe is downloaded, when I start the download, the focus shifts and the webpage thinks that the app has been launched, whereas the app actually hasn't yet been installed even.
I need a focus checking mechanism which detects when the specific app has been launched and focus shifts and not respond to any other focus shifts.
This is my code:
_registerEvent = function(target, eventType, cb) {
if (target.addEventListener) {
target.addEventListener(eventType, cb);
return {
remove: function() {
target.removeEventListener(eventType, cb);
}
};
} else {
target.attachEvent(eventType, cb);
return {
remove: function() {
target.detachEvent(eventType, cb);
}
};
}
},
checkIfHasProtocol = function($el) {
openUriWithTimeoutHack(url);
},
openUriWithTimeoutHack = function(protocol) {
var timeout = setTimeout(function() {
handler.remove();
checkIfHasProtocol(protocol);
}, 5000);
var target = window;
while (target != target.parent) {
target = target.parent;
}
var handler = _registerEvent(window, "blur", onBlur);
function onBlur() {
if (tabVisible() && isBlurred) {
clearTimeout(timeout);
handler.remove();
//App has been launched
}
}
}
window.location = protocol;
};
tabVisible(function() {
if (tabVisible() && inCheck) {
inCheck = false;
}
});
window.addEventListener("blur", function() {
isBlurred = true;
});
window.addEventListener("focus", function() {
isBlurred = false;
inCheck = false;
});
I'm trying make a firefox add-on, which reloads a page automatically under some conditions.
First I add a contentScript to a tab to get some information on the page in my addon
tab.attach({
contentScript:self.port.emit...
I have it working to the point of the refresh with
tab.reload();
but then an alert pops up every time "if it should resend data".
I want to resend the data automatically.
How and where do I do it? In the add-on or in the contentScript?
Has it to do with the Load Flags constant?
This clicks the accept button when the prompt opens. But you see the prompt window for like a couple hundred ms.
i had to use setTimeout with 0 wait time other wise the aDOMWindow.args property and aDOMWindow.Dialog and a bunch of other stuff would be undefined or null so weird. But this works:
var stringBundle = Services.strings.createBundle('chrome://browser/locale/appstrings.properties');
try {
windowListener.unregister();
} catch (ignore) {}
var windowListener = {
//DO NOT EDIT HERE
onOpenWindow: function(aXULWindow) {
// Wait for the window to finish loading
let aDOMWindow = aXULWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowInternal || Ci.nsIDOMWindow);
aDOMWindow.addEventListener('load', function() {
aDOMWindow.removeEventListener('load', arguments.callee, false);
windowListener.loadIntoWindow(aDOMWindow, aXULWindow);
}, false);
},
onCloseWindow: function(aXULWindow) {},
onWindowTitleChange: function(aXULWindow, aNewTitle) {},
register: function() {
// Load into any existing windows
let XULWindows = Services.wm.getXULWindowEnumerator(null);
while (XULWindows.hasMoreElements()) {
let aXULWindow = XULWindows.getNext();
let aDOMWindow = aXULWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowInternal || Ci.nsIDOMWindow);
windowListener.loadIntoWindow(aDOMWindow, aXULWindow);
}
// Listen to new windows
Services.wm.addListener(windowListener);
},
unregister: function() {
// Unload from any existing windows
let XULWindows = Services.wm.getXULWindowEnumerator(null);
while (XULWindows.hasMoreElements()) {
let aXULWindow = XULWindows.getNext();
let aDOMWindow = aXULWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowInternal || Ci.nsIDOMWindow);
windowListener.unloadFromWindow(aDOMWindow, aXULWindow);
}
//Stop listening so future added windows dont get this attached
Services.wm.removeListener(windowListener);
},
//END - DO NOT EDIT HERE
loadIntoWindow: function(aDOMWindow, aXULWindow) {
if (!aDOMWindow) {
return;
}
if (aDOMWindow.location == 'chrome://global/content/commonDialog.xul') {
var repostString = stringBundle.GetStringFromName('confirmRepostPrompt');
var repostStringFormatted = stringBundle.formatStringFromName('confirmRepostPrompt', [aDOMWindow.Application.name], 1);
aDOMWindow.setTimeout(function() {
console.log('setimeout val 00:', aDOMWindow.args)
//aDOMWindow.args and aDOMWindow.Dialog is not available till after setTimeout of 0 so weird
if (aDOMWindow.args.text == repostString || aDOMWindow.args.text == repostStringFormatted) {
console.log('this is resend prompt so accept it');
//aDOMWindow.Dialog.ui.button0.click(); //doesnt work
//aDOMWindow.Dialog.onButton0(); // doesnt work
//aDOMWindow.ondialogaccept(); //doesnt work
var dialog = aDOMWindow.document.getElementById('commonDialog');
var btnAccept = aDOMWindow.document.getAnonymousElementByAttribute(dialog, 'dlgtype', 'accept');
btnAccept.click();
console.log('clicked');
}
}, 0);
}
},
unloadFromWindow: function(aDOMWindow, aXULWindow) {
if (!aDOMWindow) {
return;
}
}
};
windowListener.register();
open scratchpad. set environemnt to browser. run the code. refresh a page to get prompt you'll see it get clicked.
I'm writing an extension that involving adding an item to Firefox's context menu, but it appends to the end of the menu and I couldn't find any pointers customizing item's position using Addon SDK (insertBefore/insertAfter), I know how this can be done using XUL, but I'm trying to do it using Addon SDK or some sort of Addon SDK/XUL combination
This is the code snippet related to context menu
main.js
var pageMod = require("sdk/page-mod");
var data = require("sdk/self").data;
var tabs = require("sdk/tabs");
var cm = require("sdk/context-menu");
pageMod.PageMod({
include: "*.youtube.com",
contentScriptFile: data.url("page.js"),
onAttach: function (worker) {
worker.port.emit('link', data.url('convertbutton.png'));
}});
cm.Item({
label: "Convert File",
image: data.url("bighdconverterlogo128png.png"),
context: [
cm.URLContext(["*.youtube.com"]),
cm.PageContext()
],
contentScriptFile: data.url("menu.js"),
onMessage: function(vUrl){
tabs.open(vUrl);
}
});
data/menu.js
self.on("click", function(){
self.postMessage('http://hdconverter.co/' + 'c.php?url=' + window.location.href);
});
Thanks
i dont know about sdk but for non-sdk addons its easy. but because you dont have the boiler plate setup its going to look long. add this code to your addon at the bottom:
var positionToInsertMenu = 0; //set the position you want it at here
var myLabelText = 'Convert File';
const {interfaces: Ci,utils: Cu} = Components;
Cu.import('resource://gre/modules/Services.jsm');
/*start - windowlistener*/
var windowListener = {
//DO NOT EDIT HERE
onOpenWindow: function (aXULWindow) {
// Wait for the window to finish loading
let aDOMWindow = aXULWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowInternal || Ci.nsIDOMWindow);
aDOMWindow.addEventListener("load", function () {
aDOMWindow.removeEventListener("load", arguments.callee, false);
windowListener.loadIntoWindow(aDOMWindow, aXULWindow);
}, false);
},
onCloseWindow: function (aXULWindow) {},
onWindowTitleChange: function (aXULWindow, aNewTitle) {},
register: function () {
// Load into any existing windows
let XULWindows = Services.wm.getXULWindowEnumerator(null);
while (XULWindows.hasMoreElements()) {
let aXULWindow = XULWindows.getNext();
let aDOMWindow = aXULWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowInternal || Ci.nsIDOMWindow);
windowListener.loadIntoWindow(aDOMWindow, aXULWindow);
}
// Listen to new windows
Services.wm.addListener(windowListener);
},
unregister: function () {
// Unload from any existing windows
let XULWindows = Services.wm.getXULWindowEnumerator(null);
while (XULWindows.hasMoreElements()) {
let aXULWindow = XULWindows.getNext();
let aDOMWindow = aXULWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowInternal || Ci.nsIDOMWindow);
windowListener.unloadFromWindow(aDOMWindow, aXULWindow);
}
//Stop listening so future added windows dont get this attached
Services.wm.removeListener(windowListener);
},
//END - DO NOT EDIT HERE
loadIntoWindow: function (aDOMWindow, aXULWindow) {
if (!aDOMWindow) {
return;
}
var contentAreaContextMenu = aDOMWindow.document.getElementById('contentAreaContextMenu');
var myMenuItem;
if (contentAreaContextMenu) {
var menuItems = contentAreaContextMenu.querySelector('menuitem');
[].forEach.call(menuItems, function(item) {
if (item.getAttribute('label') == myLabelText) {
myMenuItem = item;
}
});
contentAreaContextMenu.removeChild(myMenuItem);
if (contentAreaContextMenu.childNodes.length >= positionToInsertMenu) { //position is greater then number of childNodes so append to end
contentAreaContextMenu.appendChild(myMenuItem);
} else {
contentAreaContextMenu.insertBefore(myMenuItem, contentAreaContextMenu.childNodes[thePosition]);
}
}
},
unloadFromWindow: function (aDOMWindow, aXULWindow) {
if (!aDOMWindow) {
return;
}
var myMenuItem = aDOMWindow.document.getElementById('myMenuItem');
if (myMenuItem) {
myMenuItem.parentNode.removeChild(myMenuItem);
}
}
};
windowListener.register();
on unload of your addon add this:
windowListener.unregister();
i copied pasted from a template and modded it real fast. for position to be accurate you probably have to consider which menuitems are hidden and which are not
I am building a firefox addon that loads javascript at every page load. I'm using progress listener function I found on this page: https://developer.mozilla.org/en/Code_snippets/Progress_Listeners
My problem is that the code seems to execute to early before the page is fully loaded which causes my script to not run. Here is my code.
var PageLoad = {
browser: null,
domain: null,
oldURL: null,
init: function() {
gBrowser.addProgressListener(urlBarListener,Components.interfaces.nsIWebProgress.NOTIFY_LOCATION);
},
uninit: function() {
gBrowser.removeProgressListener(urlBarListener);
},
processNewURL: function(aURI) {
//if (aURI.spec == this.oldURL)
//return;
MyObject.function();
this.oldURL = aURI.spec;
}
};
var urlBarListener = {
locChange: false,
QueryInterface: function(aIID) {
if (aIID.equals(Components.interfaces.nsIWebProgressListener) ||
aIID.equals(Components.interfaces.nsISupportsWeakReference) ||
aIID.equals(Components.interfaces.nsISupports))
return this;
throw Components.results.NS_NOINTERFACE;
},
onLocationChange: function(aProgress, aRequest, aURI) {
PageLoad.processNewURL(aURI);
},
onStateChange: function(aWebProgress, aRequest, aFlag, aStatus) {},
onProgressChange: function(a, b, c, d, e, f) {},
onStatusChange: function(a, b, c, d) {},
onSecurityChange: function(a, b, c) {}
};
window.addEventListener("load",
function() {
PageLoad.init()
}, false);
var MyObject = {
function : function() {
var script = PageLoad.browser.createElement('script');
script.src = 'url_to_script.js';
PageLoad.browser.getElementsByTagName('head')[0].appendChild(script);
}
};
With this code I get this error message on the console:
PageLoad.browser.getElementByTagName("head")[0] is undefined
If I add a timeout then the script does work intermittently but if the page loads slow I get the same error, here's what works sometimes setTimeout(MyObject.function, 1000);
I need a more reliable way of making sure it's executing the script after the page is loaded.
Unrelated, and it doesn't seem to cause any problems but I also see this error message:
gBrowser.addProgressListener was called with a second argument, which is not supported. See bug 608628.
If you want to load javascript at every page load - the best way is subscribing to DOMContentLoaded event:
var MyObject = {
processDOMContentLoaded: function(doc) {
var script = doc.createElement('script');
script.src = 'url_to_script.js';
script.type = 'text/javascript';
doc.getElementsByTagName('head')[0].appendChild(script);
}
};
window.addEventListener('load', function() {
var appcontent = document.getElementById('appcontent');
if(appcontent != null) {
appcontent.addEventListener('DOMContentLoaded', function(event) {
var doc = event.originalTarget;
if(doc instanceof HTMLDocument) {
MyObject.processDOMContentLoaded(doc);
}
}, true);
}
}, false);
Have not tested, but should work.
You are using onLocationChange method - but if you look at how the browser behaves, the location in the address bar changes as soon as a connection with the server is established. You should look at state changes instead:
onStateChange: function(aWebProgress, aRequest, aFlag, aStatus)
{
if ((aFlag & Components.interfaces.nsIWebProgressListener.STATE_STOP) &&
(aFlag & Components.interfaces.nsIWebProgressListener.STATE_IS_WINDOW))
{
// A window finished loading
PageLoad.windowLoaded(aWebProgress.DOMWindow);
}
},
Note that the window that finished loading is explicitly passed to PageLoad.windowLoaded() - you will be receiving notifications from different tabs and you cannot assume that the notification comes from the foreground tab.
As to the warning you are getting, just leave out the second parameter in the call to gBrowser.addProgressListener():
gBrowser.addProgressListener(urlBarListener);
tabbrowser.addProgressListener() only accepts one parameter, unlike nsIWebProgress.addProgressListener() which has a second parameter.
Actually its a great question.
You should use event listener, but carefully, because if you trigger for every page load its can trigger you more than one time (in the worst case about dozens of times).
So how you can do that?
window.addEventListener("load", function load(event){
window.removeEventListener("load", load, false); //remove listener, no longer needed
myExtension.init();
},false);
var myExtension = {
init: function() {
var appcontent = document.getElementById("appcontent"); // browser
if(appcontent){
appcontent.addEventListener("DOMContentLoaded", myExtension.onPageLoad, true);
}
},
onPageLoad: function(aEvent) {
var doc = aEvent.originalTarget; // doc is document that triggered the event
var win = doc.defaultView; // win is the window for the doc
if (doc.nodeName != "#document") return;
if (win != win.top) return;
if (win.frameElement) return;
alert("the main page has been loaded");
},
};
get notice that we check for the type of the trigger every pageload triggering to prevent multi load.
The answers that were provided were acceptable but I found yet another solution that works perfectly.
var PageLoad = {
init: function() {
if(gBrowser) gBrowser.addEventListener("DOMContentLoaded", this.onPageLoad, false);
},
onPageLoad: function(aEvent) {
var doc = aEvent.originalTarget; // doc is document that triggered the event
var win = doc.defaultView; // win is the window for the doc
if (doc.nodeName != "#document") return;
if (win != win.top) return;
if (win.frameElement) return;
MyAddon.function();
}
}
window.addEventListener("load", function load(event){
window.removeEventListener("load", load, false); //remove listener, no longer needed
PageLoad.init();
},false);