| 1 |
#! perl |
| 2 |
|
| 3 |
=head1 NAME |
| 4 |
|
| 5 |
readline - improve readline editing |
| 6 |
|
| 7 |
=head1 DESCRIPTION |
| 8 |
|
| 9 |
A support package that tries to make editing with readline easier. At |
| 10 |
the moment, it reacts to clicking shift-left mouse button by trying to |
| 11 |
move the text cursor to this position. It does so by generating as many |
| 12 |
cursor-left or cursor-right keypresses as required (this only works |
| 13 |
for programs that correctly support wide characters). |
| 14 |
|
| 15 |
To avoid too many false positives, this is only done when: |
| 16 |
|
| 17 |
=over |
| 18 |
|
| 19 |
=item - the tty is in ICANON state. |
| 20 |
|
| 21 |
=item - the text cursor is visible. |
| 22 |
|
| 23 |
=item - the primary screen is currently being displayed. |
| 24 |
|
| 25 |
=item - the mouse is on the same (multi-row-) line as the text cursor. |
| 26 |
|
| 27 |
=back |
| 28 |
|
| 29 |
The normal selection mechanism isn't disabled, so quick successive clicks |
| 30 |
might interfere with selection creation in harmless ways. |
| 31 |
|
| 32 |
=cut |
| 33 |
|
| 34 |
use POSIX (); |
| 35 |
|
| 36 |
my $termios = new POSIX::Termios; |
| 37 |
|
| 38 |
sub on_init { |
| 39 |
my ($self) = @_; |
| 40 |
|
| 41 |
$self->{enabled} = 1; |
| 42 |
|
| 43 |
push @{ $self->{term}{option_popup_hook} }, sub { |
| 44 |
("readline" => $self->{enabled}, sub { $self->{enabled} = shift }) |
| 45 |
}; |
| 46 |
|
| 47 |
() |
| 48 |
} |
| 49 |
|
| 50 |
sub on_button_press { |
| 51 |
my ($self, $event) = @_; |
| 52 |
|
| 53 |
$self->current_screen || $self->hidden_cursor || !$self->{enabled} |
| 54 |
and return; |
| 55 |
|
| 56 |
my $mask = $self->ModLevel3Mask | $self->ModMetaMask |
| 57 |
| urxvt::ShiftMask | urxvt::ControlMask; |
| 58 |
|
| 59 |
($event->{state} & $mask) == urxvt::ShiftMask |
| 60 |
or return; |
| 61 |
|
| 62 |
$termios->getattr ($self->pty_fd) |
| 63 |
or return; |
| 64 |
|
| 65 |
$termios->getlflag & &POSIX::ICANON |
| 66 |
and return; |
| 67 |
|
| 68 |
my ($row, $col) = $self->screen_cur; |
| 69 |
my $line = $self->line ($row); |
| 70 |
my $cur = $line->offset_of ($row, $col); |
| 71 |
my $ofs = $line->offset_of ($event->{row}, $event->{col}); |
| 72 |
|
| 73 |
$ofs >= 0 && $ofs < $line->l |
| 74 |
or return; |
| 75 |
|
| 76 |
my $diff = $ofs - $cur; |
| 77 |
my $move; |
| 78 |
|
| 79 |
if ($diff < 0) { |
| 80 |
($ofs, $cur) = ($cur, $ofs); |
| 81 |
$move = "\x1b[D"; |
| 82 |
} else { |
| 83 |
$move = "\x1b[C"; |
| 84 |
} |
| 85 |
|
| 86 |
my $skipped = substr $line->t, $cur, $ofs - $cur; |
| 87 |
$skipped =~ s/\x{ffff}//g; |
| 88 |
|
| 89 |
$self->tt_write ($move x length $skipped); |
| 90 |
|
| 91 |
1 |
| 92 |
} |
