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