Debug JavaScript/Python in Enso Source

[JaroslavTulach]

Pull Request Description

Extends the TextMate grammar to recognize foreign js and foreign python blocks and colorize them properly. Assigns URI and line numbers to properly match the location of the embedded foreign code blocks. As a result VSCode debugger smoothly steps from Enso to JavaScript or Python code.

Picture

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
  Scala,
  Java,
  style guides.
• All code has been tested:
  • Code was manually tested
  • Unit test written in 43ef037

[JaroslavTulach]

The sample script used for testing was:

from Standard.Base import all

invert ~one ~two =
    one-two


foreign js dbg = """
    debugger;
    function fac(n) {
      if (n <= 1) {
        debugger
        return 1;
      } else {
        return n * fac(n - 1);
      }
    }
    let r = fac(5)
    debugger
    return r

foreign python fib a = """
    def fib(x):
        if x <= 2:
            return 1
        else:
            f2 = fib(x-2)
            f1 = fib(x-1)
            return f1+f2

    return fib(a)

main = invert dbg (fib 5)

[JaroslavTulach]

The debugging (but not the embedded syntax coloring) works in NetBeans and IGV too:

[JaroslavTulach]

@ola-lis, can you please release new version enso4vscode-1.33.271.vsix of the Enso extension?