[AUCTeX-devel] Automatic scrolling of output buffers

[Ralf Angeli]

Does anybody know what's the deal with our process filters?  That
means, why I cannot get the buffers under their control to scroll.

The Elisp manual includes the following example in (info
"(elisp)Filter Functions"):

,----
|      (defun ordinary-insertion-filter (proc string)
|        (with-current-buffer (process-buffer proc)
|          (let ((moving (= (point) (process-mark proc))))
|            (save-excursion
|              ;; Insert the text, advancing the process marker.
|              (goto-char (process-mark proc))
|              (insert string)
|              (set-marker (process-mark proc) (point)))
|            (if moving (goto-char (process-mark proc))))))
`----

It then explains how to force point to be moved in the process buffer:

,----
|    To force point to the end of the new output, no matter where it was
| previously, eliminate the variable `moving' and call `goto-char'
| unconditionally.
`----

I inserted such a call to `goto-char' in `TeX-process-filter' and
`TeX-format-filter' (see attached patch) but nothing changed.  For
easy testing you can set `TeX-show-compilation' to t before calling
latex on a random LaTeX file.  (Note: In the first call point is moved
but in any subsequent call it is not.  This behavior is not related to
the patch, though, but was always like that.)

I also looked at other parts of the code for things like
`save-excursion' (e.g. in `TeX-run-format') which might influence the
outcome and tried if removing them helped.  But I had no luck with
that.

-- 
Ralf

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