This is not completely safe: if a loclist is created by something
other than syntastic before the error window is displayed, syntastic
will obliterate it. There is currently no way to tell if a
loclist was created by syntastic or not. Undocumented variable
g:syntastic_reuse_loc_lists can be used to disable reuse of loclists.
Also handle the case when user disables notifiers after the first run.
This doesn't work for signs though, since it causes an ugly flicker in
the common case.
This is a first step towards making :lolder and :lnewer work with
Syntastic. It still has a long way to go: a new loclist is now craeted
at each run of SyntasticMake(), but the notification machinery can only
use the last one. Ideally a single loclist would be created per window
and then reused.
If the first error in the location list refers to a file that isn't
loaded, entering the quickfix window would close it.
If `hidden` is set, `:quit`-ing the main file would not close the
quickfix window.
Move the autoloc list toggling out into its own notifier class.
Move the function that echos the error on the current line out into its
own notifier.
A few other changes were required in the process:
* move s:WideMsg() out into syntastic#util autoload lib so it is
available from the cursor notifier.
* move s:ShowLocList() into the LocList class so it is available for
the autoloclist notifier
* move s:HideLocList() into Loclist as a class method mainly to keep the
two show/hide methods together
* move the s:old_line var into the Cursor notifier where it is needed
Creates a notifier class.
Changes the existing signer class to fit the new notifier.
Moves balloons and highlighting to their own classes.
Caches and speeds up EchoCurrentError().
Adds all relevant messages to balloons rather than using the first one.
Fixes yet another (minor) bug related to g:syntastic_quiet_warnings.
