fix screen freeze bug when keyboard is shown and textfield doesn't move

[HajimeNakahara]

this is the pr for fixing screen freeze when keyboard is shown and textfield doesn't move.

[pichillilorenzo]

@HajimeNakahara sorry, but I didn't understand when it happens. Could you provide a more detailed explanation and an example? Thanks

[biner88]

Very useful, please merge @pichillilorenzo

[kidwar]

@pichillilorenzo
Step to reproduce:

-> Click on a textfield inside webview‬ -> keyboard will be show up -> Click on another textfield -> Try to scroll bottom of page -> Can't scroll to bottom of page because total height of page is wrong now.

Very useful, please merge!

[pichillilorenzo]

@kidwar I am still not able to replicate the issue.
If I use https://github.com/login as initial URL example of an InAppWebView, I'm able to switch between username and password text inputs and still scroll the page without any issue.
If I test the code of this pull request, when the keyboard shows up, it adds unnecessary scrollable empty space to the end of the webpage.
Please, if you can, post a complete code example that can replicate the issue, otherwise I cannot test and find the right solution for the problem, if it is a real problem of the WebView first of all.

[kidwar]

@pichillilorenzo can you test with https://websitesandapps.co.uk/form.html as initial URL example

Video demo:
flutter_inappwebview: 6.0.0-beta.24

RPReplay_Final1686645673.MP4

[RMatushkin]

Any updates here?

[prateekrk]

something similar to the issue i have raised 2049?