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Revision 1.12 by root, Mon Jan 2 22:23:26 2006 UTC vs.
Revision 1.24 by root, Tue Jan 3 20:47:36 2006 UTC

1=encoding utf8
2
1=head1 NAME 3=head1 NAME
2 4
3@@RXVT_NAME@@perl - rxvt-unicode's embedded perl interpreter 5@@RXVT_NAME@@perl - rxvt-unicode's embedded perl interpreter
4 6
5=head1 SYNOPSIS 7=head1 SYNOPSIS
22 24
23Scripts are compiled in a 'use strict' and 'use utf8' environment, and 25Scripts are compiled in a 'use strict' and 'use utf8' environment, and
24thus must be encoded as UTF-8. 26thus must be encoded as UTF-8.
25 27
26Each script will only ever be loaded once, even in @@RXVT_NAME@@d, where 28Each script will only ever be loaded once, even in @@RXVT_NAME@@d, where
27scripts will be shared (But not enabled) for all terminals. 29scripts will be shared (but not enabled) for all terminals.
30
31=head2 Prepackaged Extensions
32
33This section describes the extensiosn delivered with this version. You can
34find them in F<@@RXVT_LIBDIR@@/urxvt/perl/>.
35
36You can activate them like this:
37
38 @@RXVT_NAME@@ -pe <extensionname>
39
40=over 4
41
42=item selection
43
44Intelligent selection. This etxension tries to be more intelligent when the user
45extends selections (double-click).
46
47It also offers the following bindable event:
48
49=over 4
50
51=item rot13
52
53Rot-13 the selection when activated. Used via keyboard trigger:
54
55 URxvt.keysym.C-M-r: perl:selection:rot13
56
57=back
58
59=item digital-clock
60
61Displays a digital clock using the built-in overlay.
62
63=item example-refresh-hooks
64
65Displays a very simple digital clock in the upper right corner of the
66window. Illustrates overwriting the refresh callbacks to create your own
67overlays or changes.
68
69=back
28 70
29=head2 General API Considerations 71=head2 General API Considerations
30 72
31All objects (such as terminals, time watchers etc.) are typical 73All objects (such as terminals, time watchers etc.) are typical
32reference-to-hash objects. The hash can be used to store anything you 74reference-to-hash objects. The hash can be used to store anything you
33like. All members starting with an underscore (such as C<_ptr> or 75like. All members starting with an underscore (such as C<_ptr> or
34C<_hook>) are reserved for internal uses and must not be accessed or 76C<_hook>) are reserved for internal uses and B<MUST NOT> be accessed or
35modified). 77modified).
36 78
37When objects are destroyed on the C++ side, the perl object hashes are 79When objects are destroyed on the C++ side, the perl object hashes are
38emptied, so its best to store related objects such as time watchers and 80emptied, so its best to store related objects such as time watchers and
39the like inside the terminal object so they get destroyed as soon as the 81the like inside the terminal object so they get destroyed as soon as the
40terminal is destroyed. 82terminal is destroyed.
41 83
42=head2 Hooks 84=head2 Hooks
43 85
44The following subroutines can be declared in loaded scripts, and will be called 86The following subroutines can be declared in loaded scripts, and will be
45whenever the relevant event happens. 87called whenever the relevant event happens.
88
89The first argument passed to them is an object private to each terminal
90and extension package. You can call all C<urxvt::term> methods on it, but
91its not a real C<urxvt::term> object. Instead, the real C<urxvt::term>
92object that is shared between all packages is stored in the C<term>
93member.
46 94
47All of them must return a boolean value. If it is true, then the event 95All of them must return a boolean value. If it is true, then the event
48counts as being I<consumed>, and the invocation of other hooks is skipped, 96counts as being I<consumed>, and the invocation of other hooks is skipped,
49and the relevant action might not be carried out by the C++ code. 97and the relevant action might not be carried out by the C++ code.
50 98
82Called whenever a selection has been copied, but before the selection is 130Called whenever a selection has been copied, but before the selection is
83requested from the server. The selection text can be queried and changed 131requested from the server. The selection text can be queried and changed
84by calling C<< $term->selection >>. 132by calling C<< $term->selection >>.
85 133
86Returning a true value aborts selection grabbing. It will still be hilighted. 134Returning a true value aborts selection grabbing. It will still be hilighted.
135
136=item on_sel_extend $term
137
138Called whenever the user tries to extend the selection (e.g. with a double
139click) and is either supposed to return false (normal operation), or
140should extend the selection itelf and return true to suppress the built-in
141processing.
142
143See the F<selection> example extension.
87 144
88=item on_focus_in $term 145=item on_focus_in $term
89 146
90Called whenever the window gets the keyboard focus, before urxvt does 147Called whenever the window gets the keyboard focus, before urxvt does
91focus in processing. 148focus in processing.
132C<perl:string> action bound to it (see description of the B<keysym> 189C<perl:string> action bound to it (see description of the B<keysym>
133resource in the @@RXVT_NAME@@(1) manpage). 190resource in the @@RXVT_NAME@@(1) manpage).
134 191
135=back 192=back
136 193
194=head2 Variables in the C<urxvt> Package
195
196=over 4
197
198=item $urxvt::TERM
199
200The current terminal. Whenever a callback/Hook is bein executed, this
201variable stores the current C<urxvt::term> object.
202
203=back
204
137=head2 Functions in the C<urxvt> Package 205=head2 Functions in the C<urxvt> Package
138 206
139=over 4 207=over 4
140 208
141=item urxvt::fatal $errormessage 209=item urxvt::fatal $errormessage
155 223
156=item $time = urxvt::NOW 224=item $time = urxvt::NOW
157 225
158Returns the "current time" (as per the event loop). 226Returns the "current time" (as per the event loop).
159 227
228=back
229
230=head2 RENDITION
231
232Rendition bitsets contain information about colour, font, font styles and
233similar information for each screen cell.
234
235The following "macros" deal with changes in rendition sets. You should
236never just create a bitset, you should always modify an existing one,
237as they contain important information required for correct operation of
238rxvt-unicode.
239
240=over 4
241
242=item $rend = urxvt::DEFAULT_RSTYLE
243
244Returns the default rendition, as used when the terminal is starting up or
245being reset. Useful as a base to start when creating renditions.
246
247=item $rend = urxvt::OVERLAY_RSTYLE
248
249Return the rendition mask used for overlays by default.
250
251=item $rendbit = urxvt::RS_Bold, RS_Italic, RS_Blink, RS_RVid, RS_Uline
252
253Return the bit that enabled bold, italic, blink, reverse-video and
254underline, respectively. To enable such a style, just logically OR it into
255the bitset.
256
257=item $foreground = urxvt::GET_BASEFG $rend
258
259=item $background = urxvt::GET_BASEBG $rend
260
261Return the foreground/background colour index, respectively.
262
263=item $rend = urxvt::SET_FGCOLOR ($rend, $new_colour)
264
265=item $rend = urxvt::SET_BGCOLOR ($rend, $new_colour)
266
267Replace the foreground/background colour in the rendition mask with the
268specified one.
269
270=item $value = urxvt::GET_CUSTOM ($rend)
271
272Return the "custom" value: Every rendition has 5 bits for use by
273extensions. They can be set and changed as you like and are initially
274zero.
275
276=item $rend = urxvt::SET_CUSTOM ($rend, $new_value)
277
278Change the custom value.
279
280=back
281
160=cut 282=cut
161 283
162package urxvt; 284package urxvt;
163 285
164use strict; 286use strict;
287use Scalar::Util ();
165 288
166our $term; 289our $TERM;
167our @HOOKNAME; 290our @HOOKNAME;
168our $LIBDIR; 291our $LIBDIR;
169 292
170BEGIN { 293BEGIN {
171 urxvt->bootstrap; 294 urxvt->bootstrap;
196 my $name = $HOOKNAME[$htype]; 319 my $name = $HOOKNAME[$htype];
197 320
198 my $ref = $pkg->can ("on_" . lc $name) 321 my $ref = $pkg->can ("on_" . lc $name)
199 or next; 322 or next;
200 323
201 $term->{_hook}[$htype]{$ref*1} = $ref; 324 $TERM->{_hook}[$htype]{$pkg} = $ref;
202 $hook_count[$htype]++ 325 $hook_count[$htype]++
203 or set_should_invoke $htype, 1; 326 or set_should_invoke $htype, 1;
204 } 327 }
205} 328}
206 329
230 } 353 }
231} 354}
232 355
233# called by the rxvt core 356# called by the rxvt core
234sub invoke { 357sub invoke {
235 local $term = shift; 358 local $TERM = shift;
236 my $htype = shift; 359 my $htype = shift;
237 360
238 if ($htype == 0) { # INIT 361 if ($htype == 0) { # INIT
239 my @dirs = ((split /:/, $term->resource ("perl_lib")), "$LIBDIR/perl"); 362 my @dirs = ((split /:/, $TERM->resource ("perl_lib")), "$LIBDIR/perl");
240 363
241 for my $ext (split /:/, $term->resource ("perl_ext")) { 364 for my $ext (split /:/, $TERM->resource ("perl_ext")) {
242 my @files = grep -f $_, map "$_/$ext", @dirs; 365 my @files = grep -f $_, map "$_/$ext", @dirs;
243 366
244 if (@files) { 367 if (@files) {
245 register_package script_package $files[0]; 368 register_package script_package $files[0];
246 } else { 369 } else {
247 warn "perl extension '$ext' not found in perl library search path\n"; 370 warn "perl extension '$ext' not found in perl library search path\n";
248 } 371 }
249 } 372 }
250 373
251 } elsif ($htype == 1) { # DESTROY 374 } elsif ($htype == 1) { # DESTROY
252 if (my $hook = $term->{_hook}) { 375 if (my $hook = $TERM->{_hook}) {
253 for my $htype (0..$#$hook) { 376 for my $htype (0..$#$hook) {
254 $hook_count[$htype] -= scalar keys %{ $hook->[$htype] || {} } 377 $hook_count[$htype] -= scalar keys %{ $hook->[$htype] || {} }
255 or set_should_invoke $htype, 0; 378 or set_should_invoke $htype, 0;
256 } 379 }
257 } 380 }
258 } 381 }
259 382
260 my $cb = $term->{_hook}[$htype] 383 my $cb = $TERM->{_hook}[$htype]
261 or return; 384 or return;
262 385
263 verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $term, @_) . ")" 386 verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $TERM, @_) . ")"
264 if $verbosity >= 10; 387 if $verbosity >= 10;
265 388
266 while (my ($k, $v) = each %$cb) { 389 while (my ($pkg, $cb) = each %$cb) {
267 return 1 if $v->($term, @_); 390 return 1
391 if $cb->(
392 $TERM->{$pkg} ||= do {
393 my $proxy = bless { }, urxvt::term::proxy::;
394 Scalar::Util::weaken ($proxy->{term} = $TERM);
395 $proxy
396 },
397 @_,
398 );
268 } 399 }
269 400
270 0 401 0
271} 402}
272 403
273=back 404sub urxvt::term::proxy::AUTOLOAD {
405 $urxvt::term::proxy::AUTOLOAD =~ /:([^:]+)$/
406 or die "FATAL: \$AUTOLOAD '$urxvt::term::proxy::AUTOLOAD' unparsable";
407
408 eval qq{
409 sub $urxvt::term::proxy::AUTOLOAD {
410 my \$proxy = shift;
411 \$proxy->{term}->$1 (\@_)
412 }
413 1
414 } or die "FATAL: unable to compile method forwarder: $@";
415
416 goto &$urxvt::term::proxy::AUTOLOAD;
417}
274 418
275=head2 The C<urxvt::term> Class 419=head2 The C<urxvt::term> Class
276 420
277=over 4 421=over 4
278 422
334 478
335=item $oldtext = $term->selection ([$newtext]) 479=item $oldtext = $term->selection ([$newtext])
336 480
337Return the current selection text and optionally replace it by C<$newtext>. 481Return the current selection text and optionally replace it by C<$newtext>.
338 482
339=item $term->scr_overlay ($x, $y, $text) 483#=item $term->overlay ($x, $y, $text)
340 484#
341Create a simple multi-line overlay box. See the next method for details. 485#Create a simple multi-line overlay box. See the next method for details.
342 486#
343=cut 487#=cut
344 488
345sub urxvt::term::scr_overlay { 489sub urxvt::term::scr_overlay {
490die;
346 my ($self, $x, $y, $text) = @_; 491 my ($self, $x, $y, $text) = @_;
347 492
348 my @lines = split /\n/, $text; 493 my @lines = split /\n/, $text;
349 494
350 my $w = 0; 495 my $w = 0;
354 499
355 $self->scr_overlay_new ($x, $y, $w, scalar @lines); 500 $self->scr_overlay_new ($x, $y, $w, scalar @lines);
356 $self->scr_overlay_set (0, $_, $lines[$_]) for 0.. $#lines; 501 $self->scr_overlay_set (0, $_, $lines[$_]) for 0.. $#lines;
357} 502}
358 503
359=item $term->scr_overlay_new ($x, $y, $width, $height) 504=item $term->overlay ($x, $y, $width, $height[, $rstyle[, $border]])
360 505
361Create a new (empty) overlay at the given position with the given 506Create a new (empty) overlay at the given position with the given
362width/height. A border will be put around the box. If either C<$x> or 507width/height. C<$rstyle> defines the initial rendition style
363C<$y> is negative, then this is counted from the right/bottom side, 508(default: C<OVERLAY_RSTYLE>).
364respectively.
365 509
366=item $term->scr_overlay_off 510If C<$border> is C<2> (default), then a decorative border will be put
511around the box.
367 512
368Switch the overlay off again. 513If either C<$x> or C<$y> is negative, then this is counted from the
514right/bottom side, respectively.
369 515
370=item $term->scr_overlay_set_char ($x, $y, $char, $rend = OVERLAY_RSTYLE) 516This method returns an urxvt::overlay object. The overlay will be visible
517as long as the perl object is referenced.
371 518
372Put a single character (specified numerically) at the given overlay 519The methods currently supported on C<urxvt::overlay> objects are:
373position.
374 520
521=over 4
522
375=item $term->scr_overlay_set ($x, $y, $text) 523=item $overlay->set ($x, $y, $text, $rend)
376 524
377Write a string at the given position into the overlay. 525Similar to C<< $term->ROW_t >> and C<< $term->ROW_r >> in that it puts
526text in rxvt-unicode's special encoding and an array of rendition values
527at a specific position inside the overlay.
528
529=item $overlay->hide
530
531If visible, hide the overlay, but do not destroy it.
532
533=item $overlay->show
534
535If hidden, display the overlay again.
536
537=back
378 538
379=item $cellwidth = $term->strwidth $string 539=item $cellwidth = $term->strwidth $string
380 540
381Returns the number of screen-cells this string would need. Correctly 541Returns the number of screen-cells this string would need. Correctly
382accounts for wide and combining characters. 542accounts for wide and combining characters.
393 553
394Write the octets given in C<$data> to the tty (i.e. as program input). To 554Write the octets given in C<$data> to the tty (i.e. as program input). To
395pass characters instead of octets, you should convert your strings first 555pass characters instead of octets, you should convert your strings first
396to the locale-specific encoding using C<< $term->locale_encode >>. 556to the locale-specific encoding using C<< $term->locale_encode >>.
397 557
558=item $nrow = $term->nrow
559
560=item $ncol = $term->ncol
561
562Return the number of rows/columns of the terminal window (i.e. as
563specified by C<-geometry>, excluding any scrollback).
564
398=item $nsaved = $term->nsaved 565=item $nsaved = $term->nsaved
399 566
400Returns the number of lines in the scrollback buffer. 567Returns the number of lines in the scrollback buffer.
401 568
402=item $view_start = $term->view_start ([$newvalue]) 569=item $view_start = $term->view_start ([$newvalue])
403 570
404Returns the negative row number of the topmost line. Minimum value is 571Returns the negative row number of the topmost line. Minimum value is
405C<0>, which displays the normal terminal contents. Larger values scroll 572C<0>, which displays the normal terminal contents. Larger values scroll
406this many lines into the scrollback buffer. 573this many lines into the scrollback buffer.
407 574
575=item $term->want_refresh
576
577Requests a screen refresh. At the next opportunity, rxvt-unicode will
578compare the on-screen display with its stored representation. If they
579differ, it redraws the differences.
580
581Used after changing terminal contents to display them.
582
408=item $text = $term->ROW_t ($row_number[, $new_text]) 583=item $text = $term->ROW_t ($row_number[, $new_text[, $start_col]])
409 584
410Returns the text of the entire row with number C<$row_number>. Row C<0> 585Returns the text of the entire row with number C<$row_number>. Row C<0>
411is the topmost terminal line, row C<< $term->$ncol-1 >> is the bottommost 586is the topmost terminal line, row C<< $term->$ncol-1 >> is the bottommost
412terminal line. The scrollback buffer starts at line C<-1> and extends to 587terminal line. The scrollback buffer starts at line C<-1> and extends to
413line C<< -$term->nsaved >>. 588line C<< -$term->nsaved >>. Nothing will be returned if a nonexistent line
589is requested.
414 590
415If C<$new_text> is specified, it will completely replace the current line. 591If C<$new_text> is specified, it will replace characters in the current
592line, starting at column C<$start_col> (default C<0>), which is useful
593to replace only parts of a line. The font index in the rendition will
594automatically be updated.
416 595
417C<$text> is in a special encoding: tabs and wide characters that use more 596C<$text> is in a special encoding: tabs and wide characters that use more
418than one cell when displayed are padded with urxvt::NOCHAR characters 597than one cell when displayed are padded with urxvt::NOCHAR characters
419(C<chr 65535>). Characters with combining characters and other characters 598(C<chr 65535>). Characters with combining characters and other characters
420that do not fit into the normal tetx encoding will be replaced with 599that do not fit into the normal tetx encoding will be replaced with
425characters. 604characters.
426 605
427The methods C<< $term->special_encode >> and C<< $term->special_decode >> 606The methods C<< $term->special_encode >> and C<< $term->special_decode >>
428can be used to convert normal strings into this encoding and vice versa. 607can be used to convert normal strings into this encoding and vice versa.
429 608
430=item $rend = $term->ROW_r ($row_number[, $new_rend]) 609=item $rend = $term->ROW_r ($row_number[, $new_rend[, $start_col]])
431 610
432Like C<< $term->ROW_t >> 611Like C<< $term->ROW_t >>, but returns an arrayref with rendition
612bitsets. Rendition bitsets contain information about colour, font, font
613styles and similar information. See also C<< $term->ROW_t >>.
433 614
615When setting rendition, the font mask will be ignored.
616
617See the section on RENDITION, above.
618
619=item $length = $term->ROW_l ($row_number[, $new_length])
620
621Returns the number of screen cells that are in use ("the line
622length"). Unlike the urxvt core, this returns C<< $term->ncol >> if the
623line is joined with the following one.
624
625=item $bool = $term->is_longer ($row_number)
626
627Returns true if the row is part of a multiple-row logical "line" (i.e.
628joined with the following row), which means all characters are in use
629and it is continued on the next row (and possibly a continuation of the
630previous row(s)).
631
632=item $line = $term->line ($row_number)
633
634Create and return a new C<urxvt::line> object that stores information
635about the logical line that row C<$row_number> is part of. It supports the
636following methods:
637
638=over 4
639
640=item $text = $line->t
641
642Returns the full text of the line, similar to C<ROW_t>
643
644=item $rend = $line->r
645
646Returns the full rendition array of the line, similar to C<ROW_r>
647
648=item $length = $line->l
649
650Returns the length of the line in cells, similar to C<ROW_l>.
651
652=item $rownum = $line->beg
653
654=item $rownum = $line->end
655
656Return the row number of the first/last row of the line, respectively.
657
658=item $offset = $line->offset_of ($row, $col)
659
660Returns the character offset of the given row|col pair within the logical
661line.
662
663=item ($row, $col) = $line->coord_of ($offset)
664
665Translates a string offset into terminal coordinates again.
666
667=back
668
669=cut
670
671sub urxvt::term::line {
672 my ($self, $row) = @_;
673
674 my $maxrow = $self->nrow - 1;
675
676 my ($beg, $end) = ($row, $row);
677
678 --$beg while $self->ROW_is_longer ($beg - 1);
679 ++$end while $self->ROW_is_longer ($end) && $end < $maxrow;
680
681 bless {
682 term => $self,
683 beg => $beg,
684 end => $end,
685 len => ($end - $beg) * $self->ncol + $self->ROW_l ($end),
686 }, urxvt::line::
687}
688
689sub urxvt::line::t {
690 my ($self) = @_;
691
692 substr +(join "", map $self->{term}->ROW_t ($_), $self->{beg} .. $self->{end}),
693 0, $self->{len}
694}
695
696sub urxvt::line::r {
697 my ($self) = @_;
698
699 my $rend = [
700 map @{ $self->{term}->ROW_r ($_) }, $self->{beg} .. $self->{end}
701 ];
702 $#$rend = $self->{len} - 1;
703 $rend
704}
705
706sub urxvt::line::beg { $_[0]{beg} }
707sub urxvt::line::end { $_[0]{end} }
708sub urxvt::line::l { $_[0]{len} }
709
710sub urxvt::line::offset_of {
711 my ($self, $row, $col) = @_;
712
713 ($row - $self->{beg}) * $self->{term}->ncol + $col
714}
715
716sub urxvt::line::coord_of {
717 my ($self, $offset) = @_;
718
719 use integer;
720
721 (
722 $offset / $self->{term}->ncol + $self->{beg},
723 $offset % $self->{term}->ncol
724 )
725}
726
727=item ($row, $col) = $line->coord_of ($offset)
434=item $text = $term->special_encode $string 728=item $text = $term->special_encode $string
435 729
436Converts a perl string into the special encoding used by rxvt-unicode, 730Converts a perl string into the special encoding used by rxvt-unicode,
437where one character corresponds to one screen cell. See 731where one character corresponds to one screen cell. See
438C<< $term->ROW_t >> for details. 732C<< $term->ROW_t >> for details.
447=head2 The C<urxvt::timer> Class 741=head2 The C<urxvt::timer> Class
448 742
449This class implements timer watchers/events. Time is represented as a 743This class implements timer watchers/events. Time is represented as a
450fractional number of seconds since the epoch. Example: 744fractional number of seconds since the epoch. Example:
451 745
452 # create a digital clock display in upper right corner 746 $term->{overlay} = $term->overlay (-1, 0, 8, 1, urxvt::OVERLAY_RSTYLE, 0);
453 $term->{timer} = urxvt::timer 747 $term->{timer} = urxvt::timer
454 ->new 748 ->new
455 ->start (urxvt::NOW) 749 ->interval (1)
456 ->cb (sub { 750 ->cb (sub {
457 my ($timer) = @_;
458 my $time = $timer->at;
459 $timer->start ($time + 1);
460 $self->scr_overlay (-1, 0, 751 $term->{overlay}->set (0, 0,
461 POSIX::strftime "%H:%M:%S", localtime $time); 752 sprintf "%2d:%02d:%02d", (localtime urxvt::NOW)[2,1,0]);
462 }); 753 });
463 754
464=over 4 755=over 4
465 756
466=item $timer = new urxvt::timer 757=item $timer = new urxvt::timer
467 758
468Create a new timer object in stopped state. 759Create a new timer object in started state. It is scheduled to fire
760immediately.
469 761
470=item $timer = $timer->cb (sub { my ($timer) = @_; ... }) 762=item $timer = $timer->cb (sub { my ($timer) = @_; ... })
471 763
472Set the callback to be called when the timer triggers. 764Set the callback to be called when the timer triggers.
473 765
476Return the time this watcher will fire next. 768Return the time this watcher will fire next.
477 769
478=item $timer = $timer->set ($tstamp) 770=item $timer = $timer->set ($tstamp)
479 771
480Set the time the event is generated to $tstamp. 772Set the time the event is generated to $tstamp.
773
774=item $timer = $timer->interval ($interval)
775
776Normally (and when C<$interval> is C<0>), the timer will automatically
777stop after it has fired once. If C<$interval> is non-zero, then the timer
778is automatically rescheduled at the given intervals.
481 779
482=item $timer = $timer->start 780=item $timer = $timer->start
483 781
484Start the timer. 782Start the timer.
485 783

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