| 1 | #! perl |
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 4 |
|
|
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 { $self->{enabled} = shift }) |
|
|
45 | }; |
|
|
46 | |
|
|
47 | () |
|
|
48 | } |
| 2 | |
49 | |
| 3 | sub on_button_press { |
50 | sub on_button_press { |
| 4 | my ($self, $event) = @_; |
51 | my ($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 | $termios->getlflag & &POSIX::ICANON |
|
|
66 | and return; |
| 5 | |
67 | |
| 6 | my ($row, $col) = $self->screen_cur; |
68 | my ($row, $col) = $self->screen_cur; |
| 7 | my $line = $self->line ($row); |
69 | my $line = $self->line ($row); |
| 8 | my $cur = $line->offset_of ($row, $col); |
70 | my $cur = $line->offset_of ($row, $col); |
| 9 | my $ofs = $line->offset_of ($event->{row}, $event->{col}); |
71 | my $ofs = $line->offset_of ($event->{row}, $event->{col}); |
| 10 | |
72 | |
| 11 | if ($ofs >= 0 && $ofs < $line->l) { |
73 | $ofs >= 0 && $ofs < $line->l |
| 12 | my $diff = $ofs - $cur; |
74 | or return; |
| 13 | |
75 | |
| 14 | $self->tt_write ($diff < 0 ? "\x1b[D" x -$diff |
76 | my $diff = $ofs - $cur; |
| 15 | : "\x1b[C" x $diff); |
77 | my $move; |
| 16 | |
78 | |
| 17 | return 1; |
79 | if ($diff < 0) { |
|
|
80 | ($ofs, $cur) = ($cur, $ofs); |
|
|
81 | $move = "\x1b[D"; |
|
|
82 | } else { |
|
|
83 | $move = "\x1b[C"; |
| 18 | } |
84 | } |
| 19 | |
85 | |
| 20 | () |
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 |
| 21 | } |
92 | } |
