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#! perl
#:META:RESOURCE:%.:string:autotransform expression
=head1 NAME
selection-autotransform - automatically transform select text
=head1 DESCRIPTION
This selection allows you to do automatic transforms on a selection
whenever a selection is made.
It works by specifying perl snippets (most useful is a single C<s///>
operator) that modify C<$_> as resources:
URxvt.selection-autotransform.0: transform
URxvt.selection-autotransform.1: transform
...
For example, the following will transform selections of the form
C<filename:number>, often seen in compiler messages, into C<vi +$filename
$word>:
URxvt.selection-autotransform.0: s/^([^:[:space:]]+):(\\d+):?$/vi +$2 \\Q$1\\E\\x0d/
And this example matches the same,but replaces it with vi-commands you can
paste directly into your (vi :) editor:
URxvt.selection-autotransform.0: s/^([^:[:space:]]+(\\d+):?$/:e \\Q$1\\E\\x0d:$2\\x0d/
Of course, this can be modified to suit your needs and your editor :)
To expand the example above to typical perl error messages ("XXX at
FILENAME line YYY."), you need a slightly more elaborate solution:
URxvt.selection.pattern-0: ( at .*? line \\d+[,.])
URxvt.selection-autotransform.0: s/^ at (.*?) line (\\d+)[,.]$/:e \\Q$1\E\\x0d:$2\\x0d/
The first line tells the selection code to treat the unchanging part of
every error message as a selection pattern, and the second line transforms
the message into vi commands to load the file.
=cut
sub msg {
my ($self, $msg) = @_;
my $overlay = $self->overlay (0, 0, $self->strwidth ($msg), 1);
$overlay->set (0, 0, $msg);
$self->{timer} = urxvt::timer->new->after (2)->cb (sub {
delete $self->{timer};
undef $overlay;
});
}
sub on_init {
my ($self) = @_;
for (my $idx = 0; defined (my $res = $self->x_resource ("%.$idx")); $idx++) {
$res = $self->locale_decode ($res);
my $transform = eval "sub { $res }";
if ($transform) {
push @{ $self->{transforms} }, $transform;
} else {
warn "$res: $@";
}
}
$self->{enabled} = 1;
push @{ $self->{term}{option_popup_hook} }, sub {
("autotransform" => $self->{enabled}, sub { $self->{enabled} = shift })
};
()
}
sub on_sel_grab {
my ($self) = @_;
$self->{enabled}
or return;
my $text = $self->selection;
local $_ = $text;
for my $transform (@{ $self->{transforms} }) {
$transform->();
if ($text ne $_) {
$self->selection ($_);
s/[\x00-\x1f\x80-\x9f]/·/g;
$self->msg ($self->special_encode ("auto-transformed to $_"));
last;
}
}
()
}
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