960707 - Add support to quota manager to report localstorage usage.

Status: RESOLVED WORKSFORME

(Core :: Storage: Quota Manager, enhancement)

Description

[[:fabrice] Fabrice Desré]

We would need to know this for apps, with the usual isBrowserElement flag.

Comment 1

[Honza Bambas (:mayhemer)]

If you can pass a principal, it would be simple, we build the scope key from it.

There is DOMStorageUsage, internal class that loads usage of a scope (i.e. eTLD+1 X appId X inBrowser), find it at [1].  You can query it only via an internal API at [2], use the localstorage manager service ("@mozilla.org/dom/localStorage-manager;1") and expose an async function to get the usage value on it's interface.  You will need a callback.  The callback can be called somewhere around [3] or when the usage is already known (has been loaded) immediately.

You will have to adjust helper LoadUsageRunnable class to give you the notification and also set a flag whether the usage has been loaded from the database.


[1] http://hg.mozilla.org/mozilla-central/annotate/e44ba69207be/dom/src/storage/DOMStorageCache.h#l243
[2] http://hg.mozilla.org/mozilla-central/annotate/e44ba69207be/dom/src/storage/DOMStorageManager.cpp#l273
[3] http://hg.mozilla.org/mozilla-central/annotate/e44ba69207be/dom/src/storage/DOMStorageCache.cpp#l714


(Note: no time to work on this right now)

Comment 2

[Jan Varga [:janv]]

Fixed by LSNG.