зеркало из https://github.com/mozilla/gecko-dev.git
44 строки
2.4 KiB
Plaintext
44 строки
2.4 KiB
Plaintext
This implements 4.x-like roaming.
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To make the implementation vastly more simple, it has been decided that no
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syncing during the session happens. The design will not allow that either
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(at most sync in certain intervalls). A full-blown dynamic implementation
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that immediately update the server when a data change occured requires the
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cooperation of the data providers (bookmarks, prefs etc.) and is thus a huge
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change that I will leave to somebody else to implement independant of this
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roaming support here. alecf made such proposals a longer time ago on
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n.p.m.prefs, they sounded very interesting, but unfortunately, nobody
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implemented them so far.
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When the users selected a profile, we will check, if it's a roaming profile
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and where the data lies. If necessary, we will contact the server and
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download the data as files. We will overwrite local profile files with
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the downloaded ones. Then, the profile works as if it were fully local.
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When the user then logs out (shuts down Mozilla or switches to another
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profile), we upload the local files, overwriting those on the server.
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Following Conrad Carlen's advise, I do not hook up using nsIProfileChangeStatus,
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but in nsProfile directly. That just calls |nsISessionRoaming|.
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Its implementation uses various protocol handlers like |mozSRoamingCopy| to
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do the upload/download. These in turn may use generic protocol handlers like
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the netwerk HTTP protocol to do that.
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Also following Conrad's advise, I do not store the roaming prefs in the prefs
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system (prefs.js etc.), because that it not yet initialized when I need the
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data (of course - prefs.js, user.js etc. might get changed by us), but in
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the Mozilla application registry. For the structure, see the comment at
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the top of prefs/top.js.
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Overview of implementation:
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- transfer.js (the Transfer class and support classes) contains the
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non-GUI logic to transfer files and track the progress and success.
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- progressDialog.* shows the progress to the user (and also works as interface
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to the C++ code)
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- conflictCheck.js is the "controller", controls the overall execution flow.
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It determines what has to be done (which files to transfer when etc.),
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including the conflict resolution logic, and kicks off the transfers.
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There is a long comment at the top describing the implementation.
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- conflictResolution.* is a dialog to ask the user when we don't know which
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version of a file to use.
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