This addresses https://savannah.gnu.org/bugs/?49803.

But do it correctly this time: don't switch it on when replacing.

This fixes https://savannah.gnu.org/bugs/?49750.

Modern VTE-based terminals now produce codes for those keys and
no longer swallow them when nano is active.

This addresses https://savannah.gnu.org/bugs/?49746.

Only when doing replacements does the edit window need a refresh: for
every new spotlight.  So, do the update request in the latter routine.

Achieve this by reusing the code that gives feedback when trying to
save a buffer while using --tempfile and the file has no name yet.

This fixes https://savannah.gnu.org/bugs/?48622.

Also for Delete, End, PageUp and PageDown (on some terminals)
the last byte in the sequence needs to be checked.

This fixes https://savannah.gnu.org/bugs/?49710.

That is: when --rebindkeypad is in effect -- without this option
they were already getting distinguished.

Both would jump a word to the left -- now each jumps a word in the
proper direction.

This fixes https://savannah.gnu.org/bugs/?49636.

It does not update anything -- it just picks a new point from
where to start displaying the buffer.  All actual updating of
the screen is done by edit_refresh() and edit_redraw() and such.

There is no need to look at this for every painted line, because
the margin can only change when some key is struck.

Instead of doing this in two places: after interpreting shortcuts,
and after injecting characters.

To prevent the display from getting messed up, making nano unusable.

It can be activated with --linenumbers on the command line or with
'set linenumbers' in a nanorc file, and it can be toggled with M-#.
Signed-off-by: Faissal Bensefia <faissaloo@gmail.com>
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>

This fixes https://savannah.gnu.org/bugs/?49058 reported by Rishabh Dave.

This fixes https://savannah.gnu.org/bugs/?49106.

This fixes https://savannah.gnu.org/bugs/?47710
and fixes https://savannah.gnu.org/bugs/?49088.

Returning a zero would mean returning a ^Space -- the keycode that
by default is bound to the Next-Word function.  So, unbinding the
keys to which the modified Arrow keys are hard bound would cause
the latter ones to mysteriously jump to the next word.

This partially fixes https://savannah.gnu.org/bugs/?49058.

This fixes https://savannah.gnu.org/bugs/index.php?42189.

And also case-sensitive searches, backward searches, and searching again.

And correct a comment: the key /does/ occur also in the tiny version.

These keycodes have non-rebindable entries in the list of shortcuts, so
they will always be there -- no need for a function call to find them.

In the tiny version it would beep and report an unbound key for every
window resize.

Mentioning "GNU nano" instead of "This program" and referring to the
website instead of to a postal address.

Add the keycodes and routines to allow the user to forego setting the
mark explicitly (with M-A / ^6) and instead quickly select a few words
or lines by holding down Shift together with the movement keys.

(Some combinations with Shift are swallowed by some terminal emulators.
To work around some of those, the combinations Shift+Alt+Left/Right work
as Shift+Home/End and Shift+Alt+Up/Down work as Shift+PageUp/PageDown.)

And move a statement to a better place.

This also prevents the message from spilling into the help lines
when the terminal is less than four columns wide.  (Not that one
can read anything then, but it looks better.)