willnode / webviewhook

Exposed Unity Editor WebView API

WebViewHook

Warning: WebViewHook is obsolete for Unity 2020 and Above due to removal of Asset Store Browsing in Unity Editor. This project is soon to be archived.

This is a code snippet to access a hidden WebView API from Unity Editor, and load it to EditorWindow.

Code

Download WebViewHook. See usage example in WebWindow or WebEditor. You may download the whole project if necessary.

Usage

Minimum code to get WebView working:

class WebViewDemo : EditorWindow
{

    WebViewHook webView;

    void OnEnable()
    {
        if (!webView)
        {
            // create webView
            webView = CreateInstance<WebViewHook>();
        }
    }

    public void OnBecameInvisible()
    {
        if (webView)
        {
            // signal the browser to unhook
            webView.Detach();
        }
    }

    void OnDestroy()
    {
        //Destroy web view
        DestroyImmediate(webView);
    }

    void OnGUI()
    {
        // hook to this window
        if (webView.Hook(this))
            // do the first thing to do
            webView.LoadURL("https://google.com");

        if (ev.type == EventType.Repaint)
        {
            // keep the browser aware with resize
            webView.OnGUI(new Rect(Vector2.zero, this.position.size));
        }
    }
}

Two Way Communication

Using LoadURL, LoadHTML and ExecuteJavascript you only can send information to WebView.

To extract informations from WebView you need external communication, and the easiest way to do this is by using Web Socket.

To get web socket server running you need to download WebSocket-Sharp and a script utility from this repo.

See WebData for minimal working example of using WebSocketHook to hook C# into javascript variable.

More Information and Caveats

This is an editor only solution. If you're looking to add WebView to a game build then this is not the repo you're looking for.

The technology behind WebView is Chrome Embedded Framework, version 37. In Windows it's contained inside the gigantic libcef.dll.

WebView in Unity is just like Chrome, with background-color default to darkgrey and no plugins (Flash/Java/PDF) allowed.

I solving bugs as I can, but of course limited. If you can't open a specific website, mostly comes down to the fact that Unity haven't upgrade their CEF browser.

webviewhook's Issues

Unable to load 3D models view

Hi,
I've tried to show Sketchfab preview in Editor but for example https://sketchfab.com/models/1acf7ffda1b140fa8d585342ad8440e4 shows constant Loading 3D model.
Do you know why?

Btw, great plugin! Thank you

Opening a new scene stops the WebWindow from working

Hi,

I am using the WebWindow example in Unity 2018 and once I open a new scene the WebWindow view stops working and become grey, to make it open again, I have to close it and reopen it. Is there a fix for this to make the window persistent?

Thanks,

Potential callback to extract info out of WebView

I think it's bit cumbersome to use WebSocket just to extract simple info out of WebView.

You can see in /Assets/Editor/WebViewHook.cs that there's a lot potential callbacks. Those are what I found when browsing Editor CS source. But some how it didn't work.

The only thing that works is that LocationChanged, I figured that you can do like window.location.hash = "foobar" and that LocationChanged url param will be like https://example.com/path/to/whatever#foobar, which means it can be exploited to base for communicating and callback to C# out of JS.

Ugly. But that's a lot better than WebSocket. We should somehow implement this into WebViewHook/WebSocketHook if there's no better option found.

How can I load youtube videos?

How can I load youtube videos? I can't seem to load them as it says the browser is not supported.
Thanks,
Bruno

Download is not working

Hi,

Could you help me on how to make it work for downloads?
Seems all downloads don't work

Thanks in advance.

Web page source

Is it possible to get loaded page source code?
Thank You.

WebView content disappears when the window is docked

Despite images in Readme show docked windows with content, in practice when the window is docked its webview content disappears forever (undocking does not return it back). Tested in Unity 2018.4.13