How to support file uploads in webView and opening external links in the default browser

[ukane-philemon]

Hi, @progrium. I appreciate the Macdrive library and have been trying to use it to achieve certain functionality in Go.

• Supporting file uploads:
  I have implemented the webView:runOpenPanelWithParameters:initiatedByFrame:completionHandler: method and have set the webView UIDelegate but I get a panic each time it gets to panel.Send("beginWithCompletionHandler:", completionHandler) :

  webkitUIDelegate := objc.NewClass("WKUIDelegate", "NSObject").Alloc().Init()
  webkitUIDelegate.Class().AddMethod("webView:runOpenPanelWithParameters:initiatedByFrame:completionHandler:", func(_ objc.Object, webView objc.Object, openPanelParams objc.Object, frame objc.Object, completionHandler objc.Object) {
     allowMultipleSelection := openPanelParams.Get("allowsMultipleSelection")
     allowDirectories := openPanelParams.Get("allowsDirectories")
     panel := objc.Get("NSOpenPanel").Send("openPanel")
     panel.Set("canChooseFiles:", core.True)
     panel.Set("canChooseDirectories:", allowDirectories)
     panel.Set("allowsMultipleSelection:", allowMultipleSelection)
     panel.Send("beginWithCompletionHandler:", completionHandler)
  })
  

• Opening external links in the default browser:
  I have also implemented the webView:decidePolicyForNavigationAction:decisionHandler: method but was unable to execute the decision handler in Go using Macdrive.

  These two issues have been a pita for some time so I thought about asking for help. Thanks for your reply in advance.

  PS: I'd appreciate it if you can also show me a snippet of how to execute a completion handler(with/without arguments) using the Macdrive library in Go.
  PSS: I used a workaround for this. You can see my implementation here: https://gist.github.com/ukane-philemon/161467e65b91eaade6561a395cc1d568

[progrium]

It's on our list to figure out how to handle callbacks. If you're adventurous, you can use CGO to write Obj-C to work around this in an ad-hoc fashion.

[ukane-philemon]

I wrote some Obj-C code to handle the two issues mentioned in my original comment (I had to learn and play around with Obj-C but it was fun).

I could contribute an example/code for these scenarios. Let me know how you'd want me to go about it, @progrium.

[progrium]

You could share it as a gist here for now.

[fdidron]

@ukane-philemon I'd love to see how you implemented callbacks :)

[ukane-philemon]

Here: https://gist.github.com/ukane-philemon/161467e65b91eaade6561a395cc1d568

[fdidron]

Thank you

[progrium]

Just documenting that there should be a delegate builder and callback support for all this to work now with the new version in main.