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[Subclipse-dev] Delay when right-clicking / double clicking History ChangePaths Viewer resolved

From: Irving, Dave <dave.irving_at_logicacmg.com>
Date: 2006-04-25 11:20:19 CEST


So, I've been working on adding a context menu to the change paths
viewer to allow individual paths to have their own logs opened in the
history viewer.
One thing I ran in to very quickly - and which I believe has been
mentioned on this list before - is the long delay which occurs between a
right click in the change paths viewer and the context menu actually

After a few hours of tearing my hair out, I finally got to the bottom of
it. The eclipse internals try to do some default legacy adaptations of
selected items when building a menu bar (see
org.eclipse.ui.internal.PopupMenuExtender#menuAboutToShow /
So, right clicking a change path viewer table causes the selected
LogEntryChangePath to be asked to adapt to the following types:
    interface org.eclipse.ui.IContributorResourceAdapter
    interface org.eclipse.core.resources.IResource
    interface org.eclipse.ui.IContributorResourceAdapter
    class org.eclipse.core.resources.mapping.ResourceMapping
    interface org.eclipse.ui.IContributorResourceAdapter
    interface org.eclipse.core.resources.Iresource

The problem is that LogEntryChangePath seems to optimistically assume it
will be asked to adapt to a remote resource - so gets the remote
resource if it hasn't got it already (network call) and -- then --
checks the type against the requested adaptation type.
The net result is that a right click causes us to fetch the remote
resource "too early" - yielding a user interface lag.

I've attached a patch to fix this up. What I do is first see whether it
is at all possible that we could be adapting to a remote resoure (check
for assignment compatability to ISVNRemoteResource). If this is the
case, we proceed as normal: Get the resource and then check the actual
type for compatability to the requested adaptation type.
Otherwise we just delegate to the base.

Let me know if this is ok,




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Received on Tue Apr 25 11:20:45 2006

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