Re: Inverse and Forward Search : This is not what I expected

Ahmet Nurlu <[email protected]> writes:

> When I make a forward search in WinEdt, YAP displays the position roughly
> corresponding to your current position in YAP.
[...]
> In my Debian/Sarge system, I use TeTeX(ver:3.0.13) and Xdvi(ver:22.84.9). When I
> initiate a forward search from gvim, Xdvi draws a rectangle around the paragraph
> in which the correspoding line in a source file belongs to. So it is a big
> margin of error. Inverse search works with the same big margin of error. It
> doesn't matter where you click in a paragraph in Xdvi, it always points the
> begining of a paragraph in the corresponding source file.

One thing you could try is make sure that you enabled all types
of source specials:

'latex --src-specials=cr,display,hbox,math,par,parend,vbox'

- maybe this will be more similar to the MikTeX behaviour.  As far as
I know, the original implementation was adopted from MikTeX, but it
might have changed; e.g. specials at some positions could have caused
problems with TeX behaving differently from non-special mode
(i.e. failing the Trip test) so that they were removed; or maybe the
MikTeX implementation has also changed in the meantime so that it uses
more/better specials now.

FWIW, I also used source specials heavily and found the
paragraph-level resolution sufficient in most cases. (FWIW,
xdvi can also do a string search in the DVI file if you're
looking for a specific word).

Some more remarks on xdvi:

The source special markers are at certain positions in the DVI
file. What xdvi does is highlight the text region (by drawing a
rectangle around it) that 'belongs' to a certain special marker,
ie. all the text following the marker up to, but not including, the
next one.

You can debug this behaviour by typing 'Ctrl-V' into the xdvi
window. This will display the positions of all special markers with
small rectangles, and print a list of all specials found on the page
to stderr. The specials have the format "src:<line number><source file>".

You can also type 'Ctrl-X' and it will tell you the coordinates and
line number of the closest source special in the statusline at the
bottom of the window.

If the specials displayed by 'Ctrl-V' do correspond to what's
highlighted in 'forward search' (.tex to DVI), it is indeed a problem
with TeX not inserting 'enough' specials. You could also take a DVI
file with source specials produced by MikTeX and view that in xdvi to
compare it directly and see whether you get more/better special
markers.

Best,
Stefan


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