Re: [w3c/permissions] Allow UAs to maintain zero or multiple permission stores. (#95)

>    </p>
>    <ol>
> -    <li>If the <a>user agent</a> has a {{PermissionStorage}} associated
> -    with the <a>permission storage identifier</a> in its permission store,
> -    it MUST return the {{PermissionStorage}}.
> +    <li>Let <var>settings</var> be the <a>current settings object</a>.</li>
> +    <li>
> +      Let <var>store</var> be some <a>permission store</a> associated with the
> +      <a>same origin</a> as <var>settings</var>. This store SHOULD be chosen
> +      consistently for a given <a>environment settings object</a>.

The current PR gives UAs enough flexibility to do this right:
> The UA may initialize new <a>permission stores</a> as empty or as a copy of the mappings of any other <a>permission store</a> associated with the <a>same origin</a>.

and 

> Let <var>stores</var> be a UA-selected subset of the <a>permission stores</a> … Write a mapping … into each <a>permission store</a> in <var>stores</var>

The UA would initialize realm-store/"B" from origin-store/"B", and if "B" is updated globally from another realm, it would just select the subset as all realm-stores + the origin-store.

I can drop the requirement for a per-realm store and just replace the "SHOULD be chosen consistently" from my original text with MUST, which will probably simplify it a bit.

---
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/w3c/permissions/pull/95/files/9a98a3cc8c47bc4aba961d8bf7244bb1b57f1f72#r61664822