sub _join {
shift;
- SQL::Abstract::Parts::stringify(\@_);
+ return SQL::Abstract::Parts::stringify(\@_);
}
sub format {
my ($self, $join, @parts) = @_;
- my $sql = $self->_join($join, @parts);
- return $sql unless length($sql) > $self->max_width;
- local $self->{max_width} = $self->{max_width} - length($self->indent_by);
- return join("\n", map $self->format(@$_), @parts);
+ $self->_fold_sql('', '', @{$self->_simplify($join, @parts)});
+}
+
+sub _simplify {
+ my ($self, $join, @parts) = @_;
+ return '' unless @parts;
+ return $parts[0] if @parts == 1 and !ref($parts[0]);
+ return $self->_simplify(@{$parts[0]}) if @parts == 1;
+ return [ $join, map ref() ? $self->_simplify(@$_) : $_, @parts ];
+}
+
+sub _fold_sql {
+ my ($self, $indent0, $indent, $join, @parts) = @_;
+ my @res;
+ my $w = $self->max_width;
+ my $join_len = 0;
+ (s/, \Z/,\n/ and $join_len = 1)
+ or s/\A /\n/
+ or $_ = "\n"
+ for my $line_join = $join;
+ my ($nl_pre, $nl_post) = split "\n", $line_join;
+ my $line_orig = my $line = $indent0;
+ my $next_indent = $indent.$self->indent_by;
+ my $line_proto = $indent.$nl_post;
+ PART: foreach my $idx (0..$#parts) {
+ my $p = $parts[$idx];
+ my $pre = ($line ne $line_orig ? $join : '');
+ my $j_part = $pre.(my $j = ref($p) ? $self->_join(@$p) : $p);
+ if (length($j_part) + length($line) + $join_len <= $w) {
+ $line .= $j_part;
+ next PART;
+ }
+ if (ref($p) and $p->[1] eq '(' and $p->[-1] eq ')') {
+ my $already = !($line eq $indent0 or $line eq $line_orig);
+ push @res, $line.($already ? $join : '').'('."\n";
+ my (undef, undef, $inner) = @$p;
+ my $folded = $self->_fold_sql($next_indent, $next_indent, @$inner);
+ $folded =~ s/\n\Z//;
+ push @res, $folded."\n";
+ $line_orig = $line
+ = $indent0.')'.(
+ ($nl_post and $idx < $#parts) ? ' '.$nl_post : ' '
+ );
+ next PART;
+ }
+ push @res, $line.$nl_pre."\n" if $line ne $line_orig;
+ if (length($line = $line_proto.$j) <= $w) {
+ $line_proto = $line;
+ next PART;
+ }
+ my $innerdent = @res ? $indent : $next_indent;
+ my $folded = $self->_fold_sql($line_proto, $innerdent, @$p);
+ $folded =~ s/\n\Z//;
+ push @res, $folded.$nl_pre."\n";
+ $line_orig = $line = $idx == $#parts ? '' : $line_proto;
+ }
+ return join '', @res, $line;
}
1;