Send a text from JavaScript to Ruby and receive a different one in the same JavaScript function

Developers Ruby API
1

I’m trying to send a text from a java function to ruby. This will be the input of a ruby function that gerenare another text.
I’m having problems because I don’t know how to send one text and return a different one to the same java function.
This will be a simplified example:

function myFunction(text1) {
    sketchup.test1(test1);
    alert("Received: " + suposedTextReturned)
}

This function send “text1” to ruby.

dialog.add_action_callback("test1") {|action_context, test1|
  #function
  suposedTextReturned = "This text was received from ruby function"
    }

This callback generates “suposedTextReturned”

How can I use this text again in the java function in this line?

alert("Received: " + suposedTextReturned)

I tried with return suposedTextReturnedbut is not working

2

Try:

function myFunction(text1) {
  sketchup.test1(test1, {
    onCompleted: (ruby_text) => {
      alert("Received: " + ruby_text)
    }
  })
}

The text returned to javascript will be whatever the result of the last executed statement in the add_action_callback block/proc. So, you could use:

dialog.add_action_callback("test1") { |_action_context, test1|
  "Sent by Ruby, returning #{text1}"
}
1 Like
3

Yes, it worked!
I tried with return at the end of ruby callback but there was an error. With a string at the end there is no problem.
Thanks a lot @MSP_Greg

4

The Chromium HTML dialog windows use JavaScript, not Java (which is a different yet related coding language.)

FYI, the Ruby language name is capitalized.

…

Actually, not. This JavaScript function is sending the value of test1 not text1 to Ruby.
Ie, … the JS argument and the Ruby callback argument have mismatched identifier names.

Greg’s example also parroted this error.

…

return only works from methods.

But it is optional at the end of a block because (as said) the value of the last statement will be returned anyway.

1 Like
5

@DanRathbun

Good catch.

A few weeks ago I wrote an HtmlDialog benchmark testing two vectors
[‘execute_script’, ‘on_completed’] and [‘DOM’, ‘DOM into DocumentFragment’, ‘innerHTML’]. All six combinations performed at about the same speed, so the choice is immaterial. That might not be the case with large and complex DOM manipulations…

Hence, I just copied some code from that, and didn’t look at the posted example or run the code…

Re return, it also works in lambdas. See Ruby docs Class: Proc ‘Lambda and non-lambda semantics’

6

test1 is what I needed to send but in my final code I wrote the same word in both “text1” and “test1” and It worked. I will pay more attention next time

That means that in this quoted lines “ruby_test” is doing nothing?

7

ruby_test would be the return value from Ruby … ie, WHATEVER the value is that is returned from the Ruby test1 callback block.

For example …

dialog.add_action_callback("test1") { |_action_context, test1|
  "Sent by Ruby, returning #{test1}"
}

… if test1 on the JS-side was set to be "Hello" via …

myFunction("Hello");

… then the alert popup in JS would display "Received: Sent by Ruby, returning Hello".

But you can return any string that you need from the Ruby-side, not just what the JS-side originally sent to Ruby.

1 Like