Discussion Thread AddOn

[Soroush Hat]

Hi,

I'm using sharejs for a small project similar to google docs, and I want to allow people to mark a line in the document and start a discussion about that line. As people edit the document the line number of these lines changes, I'm wondering how can I transform this data (line numbers in this case) using sharejs.

[Vincent Woo]

You can have a JSON doc that looks like

{

   text: "Body of the document...",

  annotations: {

    1: "note for line 1",

    13: "note for line 13, etc"

  }

}

and then use the operations described in https://github.com/josephg/ShareJS/wiki/JSON-Operations to manipulate the doc.

[Soroush Hat]

Thanks for reply.

I can't understand how it keeps track of annotated lines, for instance in the JSON example you've written, if another user manipulates the document between lines 1 and 13, how it transforms 13 to the new value? Shall I do it manually with the JSON types' operations?

[Jeremy Apthorp]

You want rich text support, which is issue #1 in sharejs :)

https://github.com/josephg/sharejs/issues/1

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j

[Soroush Hat]

What if we store the annotated content in some db in xml format like this:

line 1 ....

....

<comment id="uid">commented line</comment>

....

then auto-save document to keep snapshot and user content synced.

And whenever the users wants to open an existing annotated document first load the snapshot from sharejs db and then annotate it using the saved xml content?

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j

[Jeremy Apthorp]

That sounds flaky :)

Maybe one way to hack it could be to use a data model of document-as-array-of-chars:

['t','h','i','s',' ','i','s',' ','m','y',' ','d','o','c']

and to add annotations:

['t','h','i','s',' ','i','s',' ',{'c':'this is a comment'},'m','y',{'c':null},' ','d','o','c']

j

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[Joseph Gentle]

They could be actual strings.

['this is my doc'] -> ['this is ', {c:'comment'}, 'my', {c:null}, 'doc']

Its still not quite what you want though.

[Jeremy Apthorp]

The problem with them being actual strings is that you have to split them when you add an annotation, and there's no way to transform an insert or a change by a split.

j

[Soroush Hat]

Joseph, Is this something that you may want to add to the rewrite version?

[Joseph Gentle]

Rich text? No. I'm hoping someone else does it. It goes here:
https://github.com/josephg/ot-types

-J