[ZEPPELIN-958] Support syntax highlight for python and r interpreter

[minahlee]

What is this PR for?

Support syntax highlight for python and r interpreter

What type of PR is it?

Bug Fix

What is the Jira issue?

ZEPPELIN-958

Screenshots (if appropriate)

Before

After

Before

After

Questions:

• Does the licenses files need update? No
• Is there breaking changes for older versions? No
• Does this needs documentation? No

[felixcheung]

LGTM
btw, this is getting fragile - would be great if interpreter can have an extension mechanism to control what it is mapping to on the js side.

[jongyoul]

@felixcheung Could you please tell me your idea in details? Basically I agree with you, but I'm not good at frontend, I don't know whether the feature can be adopted dynamically or not. If it's possible, you could that feature into Interpreter scope. It seems nice.

[jongyoul]

BTW, this PR looks good to me. We can discuss @felixcheung's issue after merging this PR.

[bzz]

Looks great to me, let's merge as a short term solution.

And yes, as @felixcheung mentioned - in a mid\long term, it would be great for interpreter to encapsulate this knowledge!

[bzz]

Merging if there is no further discussion

[felixcheung]

right, I think that can be added to interpreterSettings and checked on the frontend similar to this:

zeppelin/zeppelin-web/src/app/interpreter/interpreter.controller.js

Line 69 in f8bc54b

varsetting=$scope.interpreterSettings[index];

[bzz]

Yes.. and this method does not work if the default interpreter is set to Python for the notebook

[felixcheung]

That was only to map the list of interpreter to the language though.

To figure out which interpreter is active in the interpreter right now we have regex to match "%something" at the beginning which won't work for the default interpreter at all.