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(sc)Filling Cited Text

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Filling Cited Text
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   Supercite will automatically fill newly cited text from the original
message unless the variable `sc-auto-fill-region-p' has a `nil' value.
Supercite will also re-fill paragraphs when you manually cite or
re-cite text.

   However, during normal editing, Supercite itself cannot be used to
fill paragraphs.  This is a change from version 2.  There are other
add-on lisp packages which do filling much better than Supercite ever
did.  The two best known are "filladapt" and "gin-mode".  Both work well
with Supercite and both are available at the normal Emacs Lisp archive
sites.  "gin-mode" works pretty well out of the box, but if you use
"filladapt", you may want to run the function `sc-setup-filladapt' from
your `sc-load-hook'.  This simply makes "filladapt" a little more
Supercite savvy than its default setup.

   Also, Supercite will collapse leading whitespace between the citation
string and the text on a line when the variable `sc-fixup-whitespace-p'
is non-`nil'.  The default value for this variable is `nil'.

   Its important to understand that Supercite's automatic filling
(during the initial citation of the reply) is very fragile.  That is
because figuring out the `fill-prefix' for a particular paragraph is a
really hard thing to do automatically.  This is especially the case when
the original message contains code or some other text where leading
whitespace is important to preserve.  For this reason, many Supercite
users typically run with `sc-auto-fill-region-p' (and possibly also
`sc-fixup-whitespace-p') set to `nil'.  They then manually fill each
cited paragraph in the reply buffer.

   I usually run with both these variables containing their default
values.  When Supercite's automatic filling breaks on a particular
message, I will use Emacs' undo feature to undo back before the
citation was applied to the original message.  Then I'll toggle the
variables and manually cite those paragraphs that I don't want to fill
or collapse whitespace on.  Note: Variable Toggling Shortcuts.

   If you find that Supercite's automatic filling is just too fragile
for your tastes, you might consider one of these alternate approaches.
Also, to make life easier, a shortcut function to toggle the state of
both of these variables is provided on the key binding `C-c C-p C-p'
(with the default value of `sc-mode-map-prefix'; Note: Post-yank
Formatting Commands).

   You will noticed that the minor mode string will show the state of
these variables as qualifier characters. When both variables are `nil',
the Supercite minor mode string will display `SC'.  When just
`sc-auto-fill-region-p' is non-`nil', the string will display `SC:f',
and when just `sc-fixup-whitespace-p' is non-`nil', the string will
display `SC:w'.  When both variables are non-`nil', the string will
display `SC:fw'.  Note that the qualifiers chosen are mnemonics for the
default bindings of the toggling function for each respective variable.
Note: Variable Toggling Shortcuts.

   Why are these variables not set to `nil' by default?  It is because
many users won't manually fill paragraphs that are Supercited, and there
have been widespread complaints on the net about mail and news messages
containing lines greater than about 72 characters.  So the default is to
fill cited text.