On 2015-09-15 20:42 -0700, Ian Zimmerman wrote:
> I just turned on pager_index_lines for the first time, partly because I
> wanted to test if it had any bearing on this issue (but it isn't the
> only reason). The answer is no, it still happens, and when it happens
> it wipes _both_ parts of the screen (both the pager and the mini-index).
> Only the top menu/help bar and the lone (orphan?) prompt on bottom
> remains.
At last I made some progress with this. I noticed this _only_ happened
when changing folders from pager, not from index. So I added these
extra crufty bindings:
macro pager c <exit>c
macro pager <esc>c <exit><esc>c
Note that in this case it's essential to use tke key ("c" and "<esc>c")
and not the function in the macro expansion, so that if it is called
from a recursive pager such as the help pager, the repeated macro scan
will find the macro again and drop back to index view.
Looking at the code, I think the ultimate cause is that functions like
<change-folder> --- which make sense in the pager but are really
implemented in the index code --- are not handled properly. There is no
explicit case for them in the dispatch loop of pager mode, instead the
pager mode is made to terminate (which entails clearing the screen!) and
the index is left to handle the function as if it was invoked from
there.
The macro hack seems to work around it, so I am not very unhappy now,
but maybe this ought to be fixed in the C code.
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