Re: *real* number of lines a window can display currently

[Klaus Berndl <klaus.berndl@sdm.de>]

On Tue, 07 Oct 2003, Stefan Monnier wrote:

> > `window-displayed-height' is a built-in function
> > (window-displayed-height &optional WINDOW)
>  [...]
> > This is what i search for GNU Emacs 21.X... Does something like this exist
> > or is there another way to reach my goal?
>  
>  I don't think such a thing exists or can be coded in elisp (the
>  count-screen-lines function fails in several cases other the one you
>  mention).  But coding it in C shouldn't be too difficult: just look at the
>  number of rows in the glyph matrix [he said, pretending he known what he's
>  talking about].

Hmm, could i write a feature-request for this? ;-)

>  
>  I'm curious to know what you need it for,

Could be needed by tools like ECB which uses tree-buffers. ECB currently does
a very smart recentering of a tree-buffer, so always a maximum of useful
informations are visible, e.g. as many subnodes as possible if a node is
expanded. ECB can currently use `count-screen-lines' for this and this works
perfect except for some very seldom (or almost pathological ;-) cases....

But nevertheless such a function would help to write the code even better
working perfectly for all cases.

Klaus

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