[Issue] Browser rendering stops working after resizing

[otrexdev]

What platform are you experiencing this issue on?

Windows x64

What version of UWB are you using?

2.2.7

What Unity version are you running?

6000.1.13f

Describe what the issue you are experiencing is.

Sometimes after resizing the browser stops rendering. This is fixed by reloading the page but it's annoying as it resets the current page state.

Provide reproducible steps for this issue.

1. Resizing using the following code snippet:

        Vector2 size = ((RectTransform)transform.parent).sizeDelta;
        size.y -= 85;
        size.x -= 2;
        browser.browserClient.Resolution = new Resolution((uint)size.x, (uint)size.y);

transform.parent refers to an Image object thats a parent object of the RawImage. The raw image anchors and pivot are set to expand with the parent with some offsets on the side that are substracted in the code,
2. The browser rendering stops

Any additional info you like to provide?

I'm willing to provide the entire project, but only if it's possible to send it to the dev of this browser directly.

[jwhenry3]

@otrexdev This seems to get resolved once you click on the UI in the web browser, so perhaps we can simulate a click on it to try to trigger a change

[jwhenry3]

The following script will check for size changes with the screen, then will execute a resolution change, then simulate a mouse click in a corner of the page, which triggers a render that will generate the accurate pixels for the texture.

I have been able to get this to produce the desired behavior

using UnityEngine;
using UnityEngine.UI;
using VoltstroStudios.UnityWebBrowser.Core;

public class WebUIResizer : MonoBehaviour
{
    [SerializeField] //SerializeField allows us to set this in the editor
    private BaseUwbClientManager clientManager;

    private WebBrowserClient webBrowserClient;
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        //Makes life easier having a local reference to WebBrowserClient
        webBrowserClient = clientManager.browserClient;
        webBrowserClient.OnClientConnected += UpdateResolution;
    }

    void UpdateResolution()
    {
        uint height = (uint)Screen.height;
        uint width = (uint)Screen.width;
        if (webBrowserClient.Resolution.Width != width || webBrowserClient.Resolution.Height != height)
        {
            webBrowserClient.Resolution = new() { Height = height, Width = width };
            webBrowserClient.SendMouseClick(
                Vector2.zero,
                1,
                VoltstroStudios.UnityWebBrowser.Shared.Events.MouseClickType.Left,
                VoltstroStudios.UnityWebBrowser.Shared.Events.MouseEventType.Up
            );
        }
    }
    // Update is called once per frame
    void Update()
    {
        UpdateResolution();
    }
}

[Voltstro]

This seems to be a bug with CEF. I have implemented a workaround in the engine that will hide and un-hide the browser while resizing. Fix will be in next UWB release.