Re: [orion-dev] Orion editor with server-side parser ?

[Remi Vankeisbelck <VANKEISB@xxxxxxxxxx>]

Hi Mark, folks,

Ok, we're getting there ! I have reused
and adapted some of your code and I have async, server-backed parsing and
highlighting ! quite cool...

I have borrowed your "shadow model"
(I could not figure out how to access the text buffer otherwise, plus the
helper methods in there helped me to do the rest) : I'm observing the model
changes, and connecting to existing HTTP parsing services that return "styles"
as JSON for a given text. I only had to translate this into Orion-enabled
data structures and fire "orion.edit.highlighter.styleReady"
events with the appropriate lines, offsets etc. It's only a POC but so
far it worked pretty well !

I only have one problem left : our styles
are CSS classes that are not built in Orion. Our parser service returns
structures like :

{
  start: 12,
  end: 20,
  name: "myStyle"
} 

So, in my current code, the DOM in the
editor ends up styled with a "myStyle" class, which doesn't exist
in Orion. By chance, some of them exist (like 'variable' or 'string' which
are defined in edit.css), which added some colors to my text :P

Is there a way for my plugin to contribute
CSS stylesheets ?

Cheers

Rémi

From:	Mark Macdonald <mamacdon@xxxxxxxxx>
To:	Orion developer discussions <orion-dev@xxxxxxxxxxx>
Date:	19/01/2015 17:58
Subject:	Re: [orion-dev] Orion editor with server-side parser ?
Sent by:	orion-dev-bounces@xxxxxxxxxxx

---

Hi Rémi,

Error
markers and completion
proposals are provided by implementing
an Orion service. Services are inherently
asynchronous, so yes -- you can
keep the "real" work on your remote server, and just call it
from the client.

Syntax highlighting is another matter. We
experimented with asynchronous highlighting in the past: a service could
asynchronously feed highlighting info into the editor, based on text changes.
This allowed you to use arbitrary parsing logic, but the user experience
was poor.

Instead, I would recommend trying the current declarative
grammar-based approach. It allows
the editor to update the syntax highlighting in realtime with no delay.
While the grammar is more restrictive than a full-blown parser, we've found
that a reasonable subset of most languages can be parsed using regexps
and simple begin..end
nesting blocks.

Regards,
Mark


On Mon, Jan 19, 2015 at 8:45 AM, Remi Vankeisbelck <VANKEISB@xxxxxxxxxx>
wrote:
Hi, 

We'd like to use Orion in order to support a custom language of ours. We
already have a parser, completion engine etc. for this language. In fact,
we even already have a JS editor, but it's based on content-editable div
and has limitations. Therefore, we are looking at alternative "web-based
text editors" that we could plug our services into, and let it handle
all the dirty GUI business... Orion looks quite nice, and we're IBM as
well, so we'd like to try it first. 

Our "problem" is that our parser etc is written in Java, and
runs in a server back-end. We have a protocol that allows our client-side
editor to interact with the server : basically parse the text and send
back highlighting infos, error markers, or completion proposals.

Does Orion support this kind of async, server-managed custom languages
? 

I've googled a bit and seen in the doc that a grammar can be passed, or
that the proposals could be customized. Can all this be done asynchronously,
by communicating with a server ? 

Thanks for any info. 

Cheers 

Rémi
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Sauf indication contraire ci-dessus:/ Unless stated otherwise above:
Compagnie IBM France
Siège Social : 17 avenue de l'Europe, 92275 Bois-Colombes Cedex
RCS Nanterre 552 118 465
Forme Sociale : S.A.S.
Capital Social : 657.364.587 €
SIREN/SIRET : 552 118 465 03644 - Code NAF 6202A