Web Panel

gustavwiz

gustavwiz

The problem is, how do I access the DOM content in the sidebar? When I use a content script, it works on all tabs/pages except on the sidebar.

vux777

vux777

@gustavwiz
have you tried to open iFrame and insert script?
something like this:
http://jaspreetchahal.org/how-to-inject-javascript-into-an-iframe/

in your case:
var iFrameHead = iframe.document.getElementsByTagName("head")[0];
var myscript = document.createElement('script');
myscript.type = 'text/javascript';
myscript.src = 'myscript.js'; // replace this with your SCRIPT
iFrameHead.appendChild(myscript);

...........
no use of manifest content scripts, they reefer to legit browser tabs

gustavwiz

gustavwiz

@vux777

THINGS TO LOOK FOR
You can only perform this task if the iFrame source is loaded from same domain. i.e. if you are running
a site abc.com then iframe src could be abc.com/hello.html


Read more: http://jaspreetchahal.org/how-to-inject-javascript-into-an-iframe/#ixzz3iz32VvM5

This is the problem.

vux777

vux777

year ago I was playing with iFrames, but I had "other way around" situation
I was injecting iframes into some other domains but with my content
(my zoom popup extension works something similar)
but you have your own environment (panel) with iframe src from different domains

btw are you sure you can't inject anything into that iframe content?
either with chrome tabs executeScript (all frames) or with content script...
because my smooth scroll extension works on pages loaded in your panel

gustavwiz

gustavwiz

@vux777

When I used 'all frames', it worked! (in content script).

The problem now is how do I identify the iframe in the sidebar? So I know that it's not any other iframe on another random site/tab? I tried to name the iframe with a spacial id, and then get it with window.frameElement.id in content script, but then I got the cross origin error the other way around (ie, the site in the iframe was trying to gain access to the iframe itself, which is on another site (where "another site" in this case is the side panel)).

Just to clarify, the thing that worked was to, from the content script, get access to the iframe content. Not the iframe itself and other panel content.

vux777

vux777

I guess webNavigation/webRequest APIs won't fire event for iFrame in sidebar?

I would inject code (content script) that will give me window.location.href so you can maintain list of visited URLs, and when user wants to go back, load last in array, and so on...
You should be able to send message from iFrame to your extension with
chrome.runtime.sendMessage({newURL: "fromCS", url: window.location.href});
with every new page, CS will be loaded and send you data needed
you will probably want to fetch window.onunload... also, so that you can know that user is navigating away from current page....and prepare some things, whatever
this takes a lot of testing btw
happy coding :party:

vux777

vux777

ohhh.... btw
compare your user input with messages from iframes (if there is no other way)
and maybe listen for clicks on links and where it takes....

................
or by sender.tabId
it should be something different than from regular tabs
that's under presumption that messaging will work from iframe

ornette

ornette

This is a great extension, I couldn't live without it, as I always used a webpanel in Opera 12 to follow tennis live scores (using the mobile site http://m.tennistemple.com/ )

The only thing that that I'm missing from the Opera 12 webpanel feature is the possibility to reduce the font size (zoom). As I generally use 110% or 125% zoom in for websites (on high resolution monitors), the font on the webpanel is a bit too large. In Opera 12, I zoomed the webpanel out to 80% in order to make it more compact while still being readable.

vux777

vux777

@gustavwiz
Vivaldi just pushed version with web panel
they don't have x-frame restrictions ofc (they made it internally)

A Former User

Yeah, I'm using vivaldi right now, their web panel function is actually awesome. Web panel doesn't reload when you change sidebar tab. It doesn't have a back or forward button yet though.

nekomajin

nekomajin

@gustavwiz
Vivaldi just pushed version with web panel
they don't have x-frame restrictions ofc (they made it internally)

It can be done with the webRequest API. https://developer.chrome.com/extensions/webRequest

I was experimenting with a similar extension, and I was able to load any site. There is an extension to bypass the x-frame. It worth to take a look at the source code. https://chrome.google.com/webstore/detail/ignore-x-frame-headers/gleekbfjekiniecknbkamfmkohkpodhe

gustavwiz

gustavwiz

@vux777:

and maybe listen for clicks on links and where it takes....

The problem is that I can only do this from the content script

It is really in the content script I need to find out if the frame is the iframe in the sidebar.

gustavwiz

gustavwiz

@nekomajin

It can be done with the webRequest API. https://developer.chrome.com/extensions/webRequest

I was experimenting with a similar extension, and I was able to load any site. There is an extension to bypass the x-frame. It worth to take a look at the source code. https://chrome.google.com/webstore/detail/ignore-x-frame-headers/gleekbfjekiniecknbkamfmkohkpodhe

Actually I'm already using the code from that extension

It's working on several sites, but not all.

nekomajin

nekomajin

Actually I'm already using the code from that extension
It's working on several sites, but not all.

Is there anything common in those sites?

gustavwiz

gustavwiz

@nekomajin

Is there anything common in those sites?

I don't know, I haven't analyzed this further.

vux777

vux777

The problem is that I can only do this from the content script
It is really in the content script I need to find out if the frame is the iframe in the sidebar.

I think there is a couple of tricks to get what you need (messaging from iframe?!)
document.referrer from within iframe is one of them and probably the simplest one
compare it to your extension panel url and set the flag in your content script for further actions

gustavwiz

gustavwiz

@vux777

document.referrer doesn't work. Either it shows nothing, or on some sites, like instagram, it shows the url of that site...

vux777

vux777

ok, another solution is messaging system
content script with all frames

this is a content script

window.onload = function() {
	if (window !== window.top) {
		var allLinks = document.links;
		for (var i=allLinks.length-1; i>=0; i--) {
			if (allLinks[i].href.startsWith('http://') || allLinks[i].href.startsWith('https://'))
				allLinks[i].addEventListener('click', clickLink, false);
		}
	} 
}

function clickLink(e) {
	chrome.runtime.sendMessage({fromCnt: 'newLink', link: this.href});
}

in your panel script add:

chrome.runtime.onMessage.addListener(function(message, sender) {
	if (message.fromCnt && !sender.frameId) console.log(message.link);
});

and observe console log (from panel)
you will get link clicks only from your iframe panel, and you can save those links in array to be able to go back
you already have links that user inserted into address form

from regular tabs, every sender object have frameId and object tab
from sidebar frame, there is only sender ID (extension id) and URL
...this is for every page I tested...with iframes or without iframes

so this could be the pattern to recognize where from message came, and ofc. to mantain the list of user navigation... simply save those urls in array and on button BACK load n-1

A Former User

The web panel has become completely unusable sadly. It reloads not only whenever you change to another sidebar extension, but also when you hide sidebar or just web panel itself. I know it's opera's fault, but is there nothing that can be done about it?

gustavwiz

gustavwiz

@vux777:

Sorry for the small delay, I've been inactive for a while with the development

You solution worked great, it was this part that was really useful:

chrome.runtime.onMessage.addListener(function(message, sender) {
  if (message.fromCnt && !sender.frameId) console.log(message.link);
});

I don't have to do all that link stuff, I just take the window.location.href, and every time the user goes to another page I will get it.

I plan to release an update soon, where I will fix a couple of problems, add features and publish the code on github.