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

[Remi Vankeisbelck <VANKEISB@xxxxxxxxxx>]

Hi Mark,

Thanks for the prompt response. 

Indeed, we also have problems with our
current approach, especially for "large" (actually pretty small)
files. Writing a robust editor with good UX ain't easy, I reckon. That's
why we're investigating for a better foundation to build upon.

Good news for content assist / problem
markers. If it's designed async, then, we should be able to plug into this.


Unfortunately, we cannot use a client-side
tooling for syntax highlighting. Our stuff is actually more complex than
a regular LALR grammar, we use a dedicated parser especially because of
this. We may be able to extract parts of our "grammar" as keywords
or stuff like this, but we definitely need our full-blown parser if we
want to be feature-equivalent in terms of highlight.

Did your async experiments behave badly
also for relatively small files ? We usually do not need to edit very large
files with our language(s).

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