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function incdec {
local EX_DATAERR=65
# Portion of the line from point to the end of the line.
local line_part="${READLINE_LINE:$READLINE_POINT}"
# Number to increment.
local number=
# If the line part doesn't contain a number, exit.
# if ! [[ "$line_part" =~ [^0-9]*([0-9]+)[^0-9]* ]]; then
# return $EX_DATAERR
# fi
number=${BASH_REMATCH[1]}
# echo "${READLINE_LINE}"
# echo "${BASH_REMATCH[0]}"
# echo "$(($number + 1))"
incremented_line="$(echo "$line_part" | perl -pe 's/(\d+)/$1+1/e')"
# echo "${READLINE_LINE:0:$READLINE_POINT}$incremented_line"
READLINE_LINE="${READLINE_LINE:0:$READLINE_POINT}$incremented_line"
# echo 'this is a test'
}
function __readline_incdec_incdec2 {
# echo "!!"
echo !#
}
# function __readline_incdec_perl {
# perl
# }
# bind -x '"\C-xa+":incdec'
# bind '"\C-xa+": "\C-e$(incdec)\e\C-e"'
# bind '"\C-xa+": "\C-e`incdec`"'
# bind '"\C-xaa":\C-xa+'
function __readline_incdec_save_readline_point {
__readline_incdec_readline_point="$READLINE_POINT"
}
bind -x '"\C-xasrp": __readline_incdec_save_readline_point'
# bind '"\C-xaa": \C-xasrp\C-c$(__readline_incdec_incdec2)\e\C-e'
# bind '"\C-xaa": \C-xasrp'
# bind '"\C-xaa": __readline_incdec_incdec2'
function __readline_incdec {
local increment_by="$1"
local backward="$2"
# local incdec =
# print "$line, ${"increment-by"}, ${"point-position"}, $backward";
line=$(perl -s -e '
sub incdec {
my ($line, $increment_by, $point_position, $is_backward) = @_;
$point_position ||= 0;
$is_backward ||= 0;
my $start_position = 0;
# my @match_ranges;
my $previous_match_start = 0;
# my $previous_match_end = 0;
while ($line =~ /(-?\d+)/g) {
if ($is_backward) {
# print "p[$point_position] -[$-[0]] +[$+[0]]\n";
# print "p[$point_position] -[$previous_match_start] +[$previous_match_end]\n";
# print "last match: $^N\n";
# print $previous_match_end - 1 . " <= $point_position < $-[0]\n";
# if ($previous_match_end - 1 <= $point_position
# && $point_position < $-[0]) {
# TODO: document, last number handline
$start_position = $-[0];
if ($point_position < $-[0]) {
# print "match at [$previous_match_start]";
$start_position = $previous_match_start;
last;
}
$previous_match_start = $-[0];
# $previous_match_end = $+[0];
# my @range = ($-[0], $+[0]);
# push @match_ranges, \@range;
}
else {
if ($point_position < $+[0]) {
$start_position = $-[0];
last;
}
}
}
pos($line) = $start_position;
$line =~ s/\G([^-\d]*)(-?\d+)/$1 . ($2 + $increment_by)/e;
return $line;
}
# print "$line, ${\"increment-by\"}, ${\"point-position\"}, $backward";
my $output = incdec($line, $increment_by, $point_position, $backward);
print $output;
' \
-- \
-line="$READLINE_LINE" \
-increment_by="$increment_by" \
-point_position="$READLINE_POINT" \
-backward="$backward"
)
# echo "$line"
READLINE_LINE="$line"
# TODO: If point was at the end, put it at the end again. The length of he line may have changed.
# TODO 2021.08.22: If new READLINE_LINE is longer, move point to the right. If shorter, move it to the left.
}
function __readline_incdec_increment {
local old_line_length="${#READLINE_LINE}"
__readline_incdec 1 1
local new_line_length="${#READLINE_LINE}"
if [ "$old_line_length" -gt "$new_line_length" ]; then
READLINE_POINT="$(($READLINE_POINT - 1))"
fi
}
function __readline_incdec_decrement {
local old_line_length="${#READLINE_LINE}"
__readline_incdec -1 1
local new_line_length="${#READLINE_LINE}"
if [ "$old_line_length" -lt "$new_line_length" ]; then
READLINE_POINT="$(($READLINE_POINT + 1))"
# elif [ "$old_line_length" -gt "$new_line_length" ]; then
# READLINE_POINT="$(($READLINE_POINT - 1))"
fi
}
bind -x '"\C-x-": __readline_incdec_decrement'
bind -x '"\C-x+": __readline_incdec_increment'
# 2021.01.15: Idea: Maybe try using $EDITOR
# 2021.08.20: Idea: If point is at start, use forward matching, if point is at end, use backward matching
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