The Alt key together with Shift is a special workaround for when
Shift+PgUp and Shift+PgDn don't work on the user's terminal. But
probably it is more common to use the Ctrl key together with Shift
to select larger pieces of text. So mention this possibility.
And in the bargain get rid of some duplicate code.
This makes a binary without UTF-8 support slightly slower, but that's
not important -- it is more than fast enough anyway. Important is that
the most used and longest code path, the UTF-8 case, becomes faster.
Note that 'is_cntrl_mbchar()' will fall back to 'is_cntrl_char()' for
a non-UTF-8 build, so the deleted piece of code really was equivalent
with the remaining piece for that case.
Take our cue from undoing/redoing line joins: when they take place on
the magicline without --nonewlines, they produce undo/redo items that
don't do anything to the text, but still position the cursor properly.
Reshuffle a bit of code so that we can do the same for magicline cuts.
This fixes https://savannah.gnu.org/bugs/?54032.
Fail during the configure phase when it is not,
instead of failing cryptically during 'make'.
This addresses https://savannah.gnu.org/bugs/?54265.
Reported-by: Peter Passchier <peter@passchier.net>
Again, if the most significant bit of a UTF-8 byte is zero, it means
the character is a single byte and we can skip the call of mblen(),
*and* if the character is one byte it also occupies just one column,
because all ASCII characters are single-column characters -- apart
from control codes.
This partially addresses https://savannah.gnu.org/bugs/?51491.
For UTF-8, if the most significant bit of a byte is zero, it means the
character is just a single byte and we can skip the call of mblen().
For files consisting of pure ASCII bytes (between 0x00 and 0x7F), this
change reduces the counting time of mbstrlen() by ninety six percent.
This partially addresses https://savannah.gnu.org/bugs/?50406.
When mbtowc() is never called with anything less than MAXCHARLEN as
the length parameter, it will apparently not get confused and will
not need to be reset.
The variable 'last_action' is set at the end of these functions,
serving to prevent a fresh action from being merged with an older
action further down on the stack. Setting 'last_action' before
exiting from undo()/redo() makes no sense.
Also adjust a sideways related old Changelog item.
The macro stuff, however, is basically my code: I told him exactly
how to do it, and I changed most of the patch before applying it.
Also, put myself in second place, as I've just about overtaken David
in the duration of maintainership.
Otherwise the first line of a multiline /*...*/-comment would be
seen as quoted and thus *not* as the first line of a paragraph.
In the code, use "/{2}" to prevent the remainder of the line
getting colored as a comment.
The paragraph-aware indenting is needed only when automatic long-line
wrapping is on (that is, when not using 'nowrap': when writing prose).
When writing code, the user most likely uses --nowrap, which will make
nano indent a new line always to the same amount as the preceding line
-- when --autoindent is in effect, of course.
The only time that feedback about the number of lines written is *not*
wanted is when writing a temporary file.
This fixes https://savannah.gnu.org/bugs/?54025.
Plus one that automake recognizes: if. Color them only at the start
of a line. Also color all possible assignment sequences (surrounded
by spaces to not color the ones in shell fragments), and add some
comments.
Benno Schulenberg