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Revision 1.18 by root, Tue Jan 3 02:01:27 2006 UTC vs.
Revision 1.36 by root, Fri Jan 6 02:58:02 2006 UTC

39 39
40=over 4 40=over 4
41 41
42=item selection 42=item selection
43 43
44Miscellaneous selection modifications. 44Intelligent selection. This extension tries to be more intelligent when
45the user extends selections (double-click). Right now, it tries to select
46urls and complete shell-quoted arguments, which is very convenient, too,
47if your F<ls> supports C<--quoting-style=shell>.
48
49It also offers the following bindable event:
45 50
46=over 4 51=over 4
47 52
48=item rot13 53=item rot13
49 54
52 URxvt.keysym.C-M-r: perl:selection:rot13 57 URxvt.keysym.C-M-r: perl:selection:rot13
53 58
54=back 59=back
55 60
56=item digital-clock 61=item digital-clock
62
63Displays a digital clock using the built-in overlay.
64
65=item mark-urls
66
67Uses per-line filtering (C<on_line_update>) to underline urls.
68
69=item example-refresh-hooks
57 70
58Displays a very simple digital clock in the upper right corner of the 71Displays a very simple digital clock in the upper right corner of the
59window. Illustrates overwriting the refresh callbacks to create your own 72window. Illustrates overwriting the refresh callbacks to create your own
60overlays or changes. 73overlays or changes.
61 74
62=item simple-overlay-clock 75=item example-filter-input
63 76
64Displays a digital clock using the built-in overlay (colourful, useless). 77A not very useful example of filtering all text output to the terminal, by
78underlining all urls that matches a certain regex (i.e. some urls :). It
79is not very useful because urls that are output in multiple steps (e.g.
80when typing them) do not get marked.
65 81
66=back 82=back
67 83
68=head2 General API Considerations 84=head2 General API Considerations
69 85
70All objects (such as terminals, time watchers etc.) are typical 86All objects (such as terminals, time watchers etc.) are typical
71reference-to-hash objects. The hash can be used to store anything you 87reference-to-hash objects. The hash can be used to store anything you
72like. All members starting with an underscore (such as C<_ptr> or 88like. All members starting with an underscore (such as C<_ptr> or
73C<_hook>) are reserved for internal uses and must not be accessed or 89C<_hook>) are reserved for internal uses and B<MUST NOT> be accessed or
74modified). 90modified).
75 91
76When objects are destroyed on the C++ side, the perl object hashes are 92When objects are destroyed on the C++ side, the perl object hashes are
77emptied, so its best to store related objects such as time watchers and 93emptied, so its best to store related objects such as time watchers and
78the like inside the terminal object so they get destroyed as soon as the 94the like inside the terminal object so they get destroyed as soon as the
79terminal is destroyed. 95terminal is destroyed.
80 96
97Argument names also often indicate the type of a parameter. Here are some
98hints on what they mean:
99
100=over 4
101
102=item $text
103
104Rxvt-unicodes special way of encoding text, where one "unicode" character
105always represents one screen cell. See L<row_t> for a discussion of this format.
106
107=item $string
108
109A perl text string, with an emphasis on I<text>. It can store all unicode
110characters and is to be distinguished with text encoded in a specific
111encoding (often locale-specific) and binary data.
112
113=item $octets
114
115Either binary data or - more common - a text string encoded in a
116locale-specific way.
117
118=back
119
81=head2 Hooks 120=head2 Hooks
82 121
83The following subroutines can be declared in loaded scripts, and will be called 122The following subroutines can be declared in loaded scripts, and will be
84whenever the relevant event happens. 123called whenever the relevant event happens.
124
125The first argument passed to them is an object private to each terminal
126and extension package. You can call all C<urxvt::term> methods on it, but
127its not a real C<urxvt::term> object. Instead, the real C<urxvt::term>
128object that is shared between all packages is stored in the C<term>
129member.
85 130
86All of them must return a boolean value. If it is true, then the event 131All of them must return a boolean value. If it is true, then the event
87counts as being I<consumed>, and the invocation of other hooks is skipped, 132counts as being I<consumed>, and the invocation of other hooks is skipped,
88and the relevant action might not be carried out by the C++ code. 133and the relevant action might not be carried out by the C++ code.
89 134
92=over 4 137=over 4
93 138
94=item on_init $term 139=item on_init $term
95 140
96Called after a new terminal object has been initialized, but before 141Called after a new terminal object has been initialized, but before
97windows are created or the command gets run. 142windows are created or the command gets run. Most methods are unsafe to
143call or deliver senseless data, as terminal size and other characteristics
144have not yet been determined. You can safely query and change resources,
145though.
98 146
99=item on_reset $term 147=item on_reset $term
100 148
101Called after the screen is "reset" for any reason, such as resizing or 149Called after the screen is "reset" for any reason, such as resizing or
102control sequences. Here is where you can react on changes to size-related 150control sequences. Here is where you can react on changes to size-related
122requested from the server. The selection text can be queried and changed 170requested from the server. The selection text can be queried and changed
123by calling C<< $term->selection >>. 171by calling C<< $term->selection >>.
124 172
125Returning a true value aborts selection grabbing. It will still be hilighted. 173Returning a true value aborts selection grabbing. It will still be hilighted.
126 174
175=item on_sel_extend $term
176
177Called whenever the user tries to extend the selection (e.g. with a double
178click) and is either supposed to return false (normal operation), or
179should extend the selection itelf and return true to suppress the built-in
180processing.
181
182See the F<selection> example extension.
183
127=item on_focus_in $term 184=item on_focus_in $term
128 185
129Called whenever the window gets the keyboard focus, before urxvt does 186Called whenever the window gets the keyboard focus, before urxvt does
130focus in processing. 187focus in processing.
131 188
151number of lines that will be in the scrollback buffer. 208number of lines that will be in the scrollback buffer.
152 209
153=item on_tty_activity $term *NYI* 210=item on_tty_activity $term *NYI*
154 211
155Called whenever the program(s) running in the urxvt window send output. 212Called whenever the program(s) running in the urxvt window send output.
213
214=item on_osc_seq $term, $string
215
216Called whenever the B<ESC ] 777 ; string ST> command sequence (OSC =
217operating system command) is processed. Cursor position and other state
218information is up-to-date when this happens. For interoperability, the
219string should start with the extension name and a colon, to distinguish
220it from commands for other extensions, and this might be enforced in the
221future.
222
223Be careful not ever to trust (in a security sense) the data you receive,
224as its source can not easily be controleld (e-mail content, messages from
225other users on the same system etc.).
226
227=item on_add_lines $term, $string
228
229Called whenever text is about to be output, with the text as argument. You
230can filter/change and output the text yourself by returning a true value
231and calling C<< $term->scr_add_lines >> yourself. Please note that this
232might be very slow, however, as your hook is called for B<all> text being
233output.
234
235=item on_line_update $term, $row
236
237Called whenever a line was updated or changed. Can be used to filter
238screen output (e.g. underline urls or other useless stuff). Only lines
239that are being shown will be filtered, and, due to performance reasons,
240not always immediately.
241
242The row number is always the topmost row of the line if the line spans
243multiple rows.
244
245Please note that, if you change the line, then the hook might get called
246later with the already-modified line (e.g. if unrelated parts change), so
247you cannot just toggle rendition bits, but only set them.
156 248
157=item on_refresh_begin $term 249=item on_refresh_begin $term
158 250
159Called just before the screen gets redrawn. Can be used for overlay 251Called just before the screen gets redrawn. Can be used for overlay
160or similar effects by modify terminal contents in refresh_begin, and 252or similar effects by modify terminal contents in refresh_begin, and
171C<perl:string> action bound to it (see description of the B<keysym> 263C<perl:string> action bound to it (see description of the B<keysym>
172resource in the @@RXVT_NAME@@(1) manpage). 264resource in the @@RXVT_NAME@@(1) manpage).
173 265
174=back 266=back
175 267
268=head2 Variables in the C<urxvt> Package
269
270=over 4
271
272=item $urxvt::TERM
273
274The current terminal. Whenever a callback/Hook is bein executed, this
275variable stores the current C<urxvt::term> object.
276
277=back
278
176=head2 Functions in the C<urxvt> Package 279=head2 Functions in the C<urxvt> Package
177 280
178=over 4 281=over 4
282
283=item $term = new urxvt [arg...]
284
285Creates a new terminal, very similar as if you had started it with
286C<system $binfile, arg...>. Croaks (and probably outputs an error message)
287if the new instance couldn't be created. Returns C<undef> if the new
288instance didn't initialise perl, and the terminal object otherwise. The
289C<init> and C<start> hooks will be called during the call.
179 290
180=item urxvt::fatal $errormessage 291=item urxvt::fatal $errormessage
181 292
182Fatally aborts execution with the given error message. Avoid at all 293Fatally aborts execution with the given error message. Avoid at all
183costs! The only time this is acceptable is when the terminal process 294costs! The only time this is acceptable is when the terminal process
193correct place, e.g. on stderr of the connecting urxvtc client. 304correct place, e.g. on stderr of the connecting urxvtc client.
194 305
195=item $time = urxvt::NOW 306=item $time = urxvt::NOW
196 307
197Returns the "current time" (as per the event loop). 308Returns the "current time" (as per the event loop).
309
310=back
198 311
199=head2 RENDITION 312=head2 RENDITION
200 313
201Rendition bitsets contain information about colour, font, font styles and 314Rendition bitsets contain information about colour, font, font styles and
202similar information for each screen cell. 315similar information for each screen cell.
218Return the rendition mask used for overlays by default. 331Return the rendition mask used for overlays by default.
219 332
220=item $rendbit = urxvt::RS_Bold, RS_Italic, RS_Blink, RS_RVid, RS_Uline 333=item $rendbit = urxvt::RS_Bold, RS_Italic, RS_Blink, RS_RVid, RS_Uline
221 334
222Return the bit that enabled bold, italic, blink, reverse-video and 335Return the bit that enabled bold, italic, blink, reverse-video and
223underline, respectively. To enable such a style, just or it onto the 336underline, respectively. To enable such a style, just logically OR it into
224bitset. 337the bitset.
225 338
226=item $foreground = urxvt::GET_BASEFG $rend 339=item $foreground = urxvt::GET_BASEFG $rend
227 340
228=item $background = urxvt::GET_BASEBG $rend 341=item $background = urxvt::GET_BASEBG $rend
229 342
234=item $rend = urxvt::SET_BGCOLOR ($rend, $new_colour) 347=item $rend = urxvt::SET_BGCOLOR ($rend, $new_colour)
235 348
236Replace the foreground/background colour in the rendition mask with the 349Replace the foreground/background colour in the rendition mask with the
237specified one. 350specified one.
238 351
352=item $value = urxvt::GET_CUSTOM ($rend)
353
354Return the "custom" value: Every rendition has 5 bits for use by
355extensions. They can be set and changed as you like and are initially
356zero.
357
358=item $rend = urxvt::SET_CUSTOM ($rend, $new_value)
359
360Change the custom value.
361
239=back 362=back
240 363
241=cut 364=cut
242 365
243package urxvt; 366package urxvt;
244 367
245use strict; 368use strict;
369use Scalar::Util ();
246 370
247our $term; 371our $TERM;
248our @HOOKNAME; 372our @HOOKNAME;
249our $LIBDIR; 373our $LIBDIR;
250 374
251BEGIN { 375BEGIN {
252 urxvt->bootstrap; 376 urxvt->bootstrap;
277 my $name = $HOOKNAME[$htype]; 401 my $name = $HOOKNAME[$htype];
278 402
279 my $ref = $pkg->can ("on_" . lc $name) 403 my $ref = $pkg->can ("on_" . lc $name)
280 or next; 404 or next;
281 405
282 $term->{_hook}[$htype]{$ref*1} = $ref; 406 $TERM->{_hook}[$htype]{$pkg} = $ref;
283 $hook_count[$htype]++ 407 $hook_count[$htype]++
284 or set_should_invoke $htype, 1; 408 or set_should_invoke $htype, 1;
285 } 409 }
286} 410}
287 411
309 433
310 $pkg 434 $pkg
311 } 435 }
312} 436}
313 437
438our $retval; # return value for urxvt
439
314# called by the rxvt core 440# called by the rxvt core
315sub invoke { 441sub invoke {
316 local $term = shift; 442 local $TERM = shift;
317 my $htype = shift; 443 my $htype = shift;
318 444
319 if ($htype == 0) { # INIT 445 if ($htype == 0) { # INIT
320 my @dirs = ((split /:/, $term->resource ("perl_lib")), "$LIBDIR/perl"); 446 my @dirs = ((split /:/, $TERM->resource ("perl_lib")), "$LIBDIR/perl");
321 447
322 for my $ext (split /:/, $term->resource ("perl_ext")) { 448 for my $ext (map { split /:/, $TERM->resource ("perl_ext_$_") } 1, 2) {
323 my @files = grep -f $_, map "$_/$ext", @dirs; 449 my @files = grep -f $_, map "$_/$ext", @dirs;
324 450
325 if (@files) { 451 if (@files) {
326 register_package script_package $files[0]; 452 register_package script_package $files[0];
327 } else { 453 } else {
328 warn "perl extension '$ext' not found in perl library search path\n"; 454 warn "perl extension '$ext' not found in perl library search path\n";
329 } 455 }
330 } 456 }
457 }
331 458
459 $retval = undef;
460
461 if (my $cb = $TERM->{_hook}[$htype]) {
462 verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $TERM, @_) . ")"
463 if $verbosity >= 10;
464
465 keys %$cb;
466
467 while (my ($pkg, $cb) = each %$cb) {
468 $retval = $cb->(
469 $TERM->{_pkg}{$pkg} ||= do {
470 my $proxy = bless { }, urxvt::term::proxy::;
471 Scalar::Util::weaken ($proxy->{term} = $TERM);
472 $proxy
473 },
474 @_,
475 ) and last;
476 }
477 }
478
332 } elsif ($htype == 1) { # DESTROY 479 if ($htype == 1) { # DESTROY
480 # remove hooks if unused
333 if (my $hook = $term->{_hook}) { 481 if (my $hook = $TERM->{_hook}) {
334 for my $htype (0..$#$hook) { 482 for my $htype (0..$#$hook) {
335 $hook_count[$htype] -= scalar keys %{ $hook->[$htype] || {} } 483 $hook_count[$htype] -= scalar keys %{ $hook->[$htype] || {} }
336 or set_should_invoke $htype, 0; 484 or set_should_invoke $htype, 0;
337 } 485 }
338 } 486 }
487
488 # clear package objects
489 %$_ = () for values %{ $TERM->{_pkg} };
490
491 # clear package
492 %$TERM = ();
339 } 493 }
340 494
341 my $cb = $term->{_hook}[$htype] 495 $retval
342 or return;
343
344 verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $term, @_) . ")"
345 if $verbosity >= 10;
346
347 while (my ($k, $v) = each %$cb) {
348 return 1 if $v->($term, @_);
349 }
350
351 0
352} 496}
353 497
354=back 498sub urxvt::term::proxy::AUTOLOAD {
499 $urxvt::term::proxy::AUTOLOAD =~ /:([^:]+)$/
500 or die "FATAL: \$AUTOLOAD '$urxvt::term::proxy::AUTOLOAD' unparsable";
501
502 eval qq{
503 sub $urxvt::term::proxy::AUTOLOAD {
504 my \$proxy = shift;
505 \$proxy->{term}->$1 (\@_)
506 }
507 1
508 } or die "FATAL: unable to compile method forwarder: $@";
509
510 goto &$urxvt::term::proxy::AUTOLOAD;
511}
355 512
356=head2 The C<urxvt::term> Class 513=head2 The C<urxvt::term> Class
357 514
358=over 4 515=over 4
516
517=item $term->destroy
518
519Destroy the terminal object (close the window, free resources etc.).
359 520
360=item $value = $term->resource ($name[, $newval]) 521=item $value = $term->resource ($name[, $newval])
361 522
362Returns the current resource value associated with a given name and 523Returns the current resource value associated with a given name and
363optionally sets a new value. Setting values is most useful in the C<init> 524optionally sets a new value. Setting values is most useful in the C<init>
381 answerbackstring backgroundPixmap backspace_key boldFont boldItalicFont 542 answerbackstring backgroundPixmap backspace_key boldFont boldItalicFont
382 borderLess color cursorBlink cursorUnderline cutchars delete_key 543 borderLess color cursorBlink cursorUnderline cutchars delete_key
383 display_name embed ext_bwidth fade font geometry hold iconName 544 display_name embed ext_bwidth fade font geometry hold iconName
384 imFont imLocale inputMethod insecure int_bwidth intensityStyles 545 imFont imLocale inputMethod insecure int_bwidth intensityStyles
385 italicFont jumpScroll lineSpace loginShell mapAlert menu meta8 modifier 546 italicFont jumpScroll lineSpace loginShell mapAlert menu meta8 modifier
386 mouseWheelScrollPage name pastableTabs path perl_eval perl_ext 547 mouseWheelScrollPage name pastableTabs path perl_eval perl_ext_1 perl_ext_2
387 perl_lib pointerBlank pointerBlankDelay preeditType print_pipe pty_fd 548 perl_lib pointerBlank pointerBlankDelay preeditType print_pipe pty_fd
388 reverseVideo saveLines scrollBar scrollBar_align scrollBar_floating 549 reverseVideo saveLines scrollBar scrollBar_align scrollBar_floating
389 scrollBar_right scrollBar_thickness scrollTtyKeypress scrollTtyOutput 550 scrollBar_right scrollBar_thickness scrollTtyKeypress scrollTtyOutput
390 scrollWithBuffer scrollstyle secondaryScreen secondaryScroll selectstyle 551 scrollWithBuffer scrollstyle secondaryScreen secondaryScroll selectstyle
391 shade term_name title transparent transparent_all tripleclickwords 552 shade term_name title transparent transparent_all tripleclickwords
397 my ($self, $name) = (shift, shift); 558 my ($self, $name) = (shift, shift);
398 unshift @_, $self, $name, ($name =~ s/\s*\+\s*(\d+)$// ? $1 : 0); 559 unshift @_, $self, $name, ($name =~ s/\s*\+\s*(\d+)$// ? $1 : 0);
399 goto &urxvt::term::_resource; 560 goto &urxvt::term::_resource;
400} 561}
401 562
563=item $rend = $term->rstyle ([$new_rstyle])
564
565Return and optionally change the current rendition. Text that is output by
566the terminal application will use this style.
567
568=item ($row, $col) = $term->screen_cur ([$row, $col])
569
570Return the current coordinates of the text cursor position and optionally
571set it (which is usually bad as applications don't expect that).
572
402=item ($row, $col) = $term->selection_mark ([$row, $col]) 573=item ($row, $col) = $term->selection_mark ([$row, $col])
403 574
404=item ($row, $col) = $term->selection_beg ([$row, $col]) 575=item ($row, $col) = $term->selection_beg ([$row, $col])
405 576
406=item ($row, $col) = $term->selection_end ([$row, $col]) 577=item ($row, $col) = $term->selection_end ([$row, $col])
415 586
416=item $oldtext = $term->selection ([$newtext]) 587=item $oldtext = $term->selection ([$newtext])
417 588
418Return the current selection text and optionally replace it by C<$newtext>. 589Return the current selection text and optionally replace it by C<$newtext>.
419 590
420=item $term->scr_overlay ($x, $y, $text) 591#=item $term->overlay ($x, $y, $text)
421 592#
422Create a simple multi-line overlay box. See the next method for details. 593#Create a simple multi-line overlay box. See the next method for details.
423 594#
424=cut 595#=cut
425 596#
426sub urxvt::term::scr_overlay { 597#sub urxvt::term::scr_overlay {
427 my ($self, $x, $y, $text) = @_; 598# my ($self, $x, $y, $text) = @_;
428 599#
429 my @lines = split /\n/, $text; 600# my @lines = split /\n/, $text;
430 601#
431 my $w = 0; 602# my $w = 0;
432 for (map $self->strwidth ($_), @lines) { 603# for (map $self->strwidth ($_), @lines) {
433 $w = $_ if $w < $_; 604# $w = $_ if $w < $_;
434 } 605# }
435 606#
436 $self->scr_overlay_new ($x, $y, $w, scalar @lines); 607# $self->scr_overlay_new ($x, $y, $w, scalar @lines);
437 $self->scr_overlay_set (0, $_, $lines[$_]) for 0.. $#lines; 608# $self->scr_overlay_set (0, $_, $lines[$_]) for 0.. $#lines;
438} 609#}
439 610
440=item $term->scr_overlay_new ($x, $y, $width, $height) 611=item $term->overlay ($x, $y, $width, $height[, $rstyle[, $border]])
441 612
442Create a new (empty) overlay at the given position with the given 613Create a new (empty) overlay at the given position with the given
443width/height. A border will be put around the box. If either C<$x> or 614width/height. C<$rstyle> defines the initial rendition style
444C<$y> is negative, then this is counted from the right/bottom side, 615(default: C<OVERLAY_RSTYLE>).
445respectively.
446 616
447=item $term->scr_overlay_off 617If C<$border> is C<2> (default), then a decorative border will be put
618around the box.
448 619
449Switch the overlay off again. 620If either C<$x> or C<$y> is negative, then this is counted from the
621right/bottom side, respectively.
450 622
451=item $term->scr_overlay_set_char ($x, $y, $char, $rend = OVERLAY_RSTYLE) 623This method returns an urxvt::overlay object. The overlay will be visible
624as long as the perl object is referenced.
452 625
453Put a single character (specified numerically) at the given overlay 626The methods currently supported on C<urxvt::overlay> objects are:
454position.
455 627
628=over 4
629
456=item $term->scr_overlay_set ($x, $y, $text) 630=item $overlay->set ($x, $y, $text, $rend)
457 631
458Write a string at the given position into the overlay. 632Similar to C<< $term->ROW_t >> and C<< $term->ROW_r >> in that it puts
633text in rxvt-unicode's special encoding and an array of rendition values
634at a specific position inside the overlay.
635
636=item $overlay->hide
637
638If visible, hide the overlay, but do not destroy it.
639
640=item $overlay->show
641
642If hidden, display the overlay again.
643
644=back
459 645
460=item $cellwidth = $term->strwidth $string 646=item $cellwidth = $term->strwidth $string
461 647
462Returns the number of screen-cells this string would need. Correctly 648Returns the number of screen-cells this string would need. Correctly
463accounts for wide and combining characters. 649accounts for wide and combining characters.
467Convert the given text string into the corresponding locale encoding. 653Convert the given text string into the corresponding locale encoding.
468 654
469=item $string = $term->locale_decode $octets 655=item $string = $term->locale_decode $octets
470 656
471Convert the given locale-encoded octets into a perl string. 657Convert the given locale-encoded octets into a perl string.
658
659=item $term->scr_add_lines ($string)
660
661Write the given text string to the screen, as if output by the application
662running inside the terminal. It may not contain command sequences (escape
663codes), but is free to use line feeds, carriage returns and tabs. The
664string is a normal text string, not in locale-dependent encoding.
665
666Normally its not a good idea to use this function, as programs might be
667confused by changes in cursor position or scrolling. Its useful inside a
668C<on_add_lines> hook, though.
669
670=item $term->cmd_parse ($octets)
671
672Similar to C<scr_add_lines>, but the argument must be in the
673locale-specific encoding of the terminal and can contain command sequences
674(escape codes) that will be interpreted.
472 675
473=item $term->tt_write ($octets) 676=item $term->tt_write ($octets)
474 677
475Write the octets given in C<$data> to the tty (i.e. as program input). To 678Write the octets given in C<$data> to the tty (i.e. as program input). To
476pass characters instead of octets, you should convert your strings first 679pass characters instead of octets, you should convert your strings first
477to the locale-specific encoding using C<< $term->locale_encode >>. 680to the locale-specific encoding using C<< $term->locale_encode >>.
478 681
682=item $window_width = $term->width
683
684=item $window_height = $term->height
685
686=item $font_width = $term->fwidth
687
688=item $font_height = $term->fheight
689
690=item $font_ascent = $term->fbase
691
479=item $nrow = $term->nrow 692=item $terminal_rows = $term->nrow
480 693
481=item $ncol = $term->ncol 694=item $terminal_columns = $term->ncol
482 695
483Return the number of rows/columns of the terminal window (i.e. as 696=item $has_focus = $term->focus
484specified by C<-geometry>, excluding any scrollback).
485 697
486=item $nsaved = $term->nsaved 698=item $is_mapped = $term->mapped
487 699
488Returns the number of lines in the scrollback buffer. 700=item $max_scrollback = $term->saveLines
701
702=item $nrow_plus_saveLines = $term->total_rows
703
704=item $lines_in_scrollback = $term->nsaved
705
706Return various integers describing terminal characteristics.
489 707
490=item $view_start = $term->view_start ([$newvalue]) 708=item $view_start = $term->view_start ([$newvalue])
491 709
492Returns the negative row number of the topmost line. Minimum value is 710Returns the negative row number of the topmost line. Minimum value is
493C<0>, which displays the normal terminal contents. Larger values scroll 711C<0>, which displays the normal terminal contents. Larger values scroll
504=item $text = $term->ROW_t ($row_number[, $new_text[, $start_col]]) 722=item $text = $term->ROW_t ($row_number[, $new_text[, $start_col]])
505 723
506Returns the text of the entire row with number C<$row_number>. Row C<0> 724Returns the text of the entire row with number C<$row_number>. Row C<0>
507is the topmost terminal line, row C<< $term->$ncol-1 >> is the bottommost 725is the topmost terminal line, row C<< $term->$ncol-1 >> is the bottommost
508terminal line. The scrollback buffer starts at line C<-1> and extends to 726terminal line. The scrollback buffer starts at line C<-1> and extends to
509line C<< -$term->nsaved >>. 727line C<< -$term->nsaved >>. Nothing will be returned if a nonexistent line
728is requested.
510 729
511If C<$new_text> is specified, it will replace characters in the current 730If C<$new_text> is specified, it will replace characters in the current
512line, starting at column C<$start_col> (default C<0>), which is useful 731line, starting at column C<$start_col> (default C<0>), which is useful
513to replace only parts of a line. The font index in the rendition will 732to replace only parts of a line. The font index in the rendition will
514automatically be updated. 733automatically be updated.
536 755
537See the section on RENDITION, above. 756See the section on RENDITION, above.
538 757
539=item $length = $term->ROW_l ($row_number[, $new_length]) 758=item $length = $term->ROW_l ($row_number[, $new_length])
540 759
541Returns the number of screen cells that are in use ("the line length"). If 760Returns the number of screen cells that are in use ("the line
542it is C<-1>, then the line is part of a multiple-row logical "line", which 761length"). Unlike the urxvt core, this returns C<< $term->ncol >> if the
543means all characters are in use and it is continued on the next row. 762line is joined with the following one.
544 763
764=item $bool = $term->is_longer ($row_number)
765
766Returns true if the row is part of a multiple-row logical "line" (i.e.
767joined with the following row), which means all characters are in use
768and it is continued on the next row (and possibly a continuation of the
769previous row(s)).
770
771=item $line = $term->line ($row_number)
772
773Create and return a new C<urxvt::line> object that stores information
774about the logical line that row C<$row_number> is part of. It supports the
775following methods:
776
777=over 4
778
779=item $text = $line->t ([$new_text])
780
781Returns or replaces the full text of the line, similar to C<ROW_t>
782
783=item $rend = $line->r ([$new_rend])
784
785Returns or replaces the full rendition array of the line, similar to C<ROW_r>
786
787=item $length = $line->l
788
789Returns the length of the line in cells, similar to C<ROW_l>.
790
791=item $rownum = $line->beg
792
793=item $rownum = $line->end
794
795Return the row number of the first/last row of the line, respectively.
796
797=item $offset = $line->offset_of ($row, $col)
798
799Returns the character offset of the given row|col pair within the logical
800line.
801
802=item ($row, $col) = $line->coord_of ($offset)
803
804Translates a string offset into terminal coordinates again.
805
806=back
807
808=cut
809
810sub urxvt::term::line {
811 my ($self, $row) = @_;
812
813 my $maxrow = $self->nrow - 1;
814
815 my ($beg, $end) = ($row, $row);
816
817 --$beg while $self->ROW_is_longer ($beg - 1);
818 ++$end while $self->ROW_is_longer ($end) && $end < $maxrow;
819
820 bless {
821 term => $self,
822 beg => $beg,
823 end => $end,
824 ncol => $self->ncol,
825 len => ($end - $beg) * $self->ncol + $self->ROW_l ($end),
826 }, urxvt::line::
827}
828
829sub urxvt::line::t {
830 my ($self) = @_;
831
832 if (@_ > 1)
833 {
834 $self->{term}->ROW_t ($_, $_[1], 0, ($_ - $self->{beg}) * $self->{ncol}, $self->{ncol})
835 for $self->{beg} .. $self->{end};
836 }
837
838 defined wantarray &&
839 substr +(join "", map $self->{term}->ROW_t ($_), $self->{beg} .. $self->{end}),
840 0, $self->{len}
841}
842
843sub urxvt::line::r {
844 my ($self) = @_;
845
846 if (@_ > 1)
847 {
848 $self->{term}->ROW_r ($_, $_[1], 0, ($_ - $self->{beg}) * $self->{ncol}, $self->{ncol})
849 for $self->{beg} .. $self->{end};
850 }
851
852 if (defined wantarray) {
853 my $rend = [
854 map @{ $self->{term}->ROW_r ($_) }, $self->{beg} .. $self->{end}
855 ];
856 $#$rend = $self->{len} - 1;
857 return $rend;
858 }
859
860 ()
861}
862
863sub urxvt::line::beg { $_[0]{beg} }
864sub urxvt::line::end { $_[0]{end} }
865sub urxvt::line::l { $_[0]{len} }
866
867sub urxvt::line::offset_of {
868 my ($self, $row, $col) = @_;
869
870 ($row - $self->{beg}) * $self->{ncol} + $col
871}
872
873sub urxvt::line::coord_of {
874 my ($self, $offset) = @_;
875
876 use integer;
877
878 (
879 $offset / $self->{ncol} + $self->{beg},
880 $offset % $self->{ncol}
881 )
882}
883
884=item ($row, $col) = $line->coord_of ($offset)
545=item $text = $term->special_encode $string 885=item $text = $term->special_encode $string
546 886
547Converts a perl string into the special encoding used by rxvt-unicode, 887Converts a perl string into the special encoding used by rxvt-unicode,
548where one character corresponds to one screen cell. See 888where one character corresponds to one screen cell. See
549C<< $term->ROW_t >> for details. 889C<< $term->ROW_t >> for details.
558=head2 The C<urxvt::timer> Class 898=head2 The C<urxvt::timer> Class
559 899
560This class implements timer watchers/events. Time is represented as a 900This class implements timer watchers/events. Time is represented as a
561fractional number of seconds since the epoch. Example: 901fractional number of seconds since the epoch. Example:
562 902
563 # create a digital clock display in upper right corner 903 $term->{overlay} = $term->overlay (-1, 0, 8, 1, urxvt::OVERLAY_RSTYLE, 0);
564 $term->{timer} = urxvt::timer 904 $term->{timer} = urxvt::timer
565 ->new 905 ->new
566 ->start (urxvt::NOW) 906 ->interval (1)
567 ->cb (sub { 907 ->cb (sub {
568 my ($timer) = @_;
569 my $time = $timer->at;
570 $timer->start ($time + 1);
571 $self->scr_overlay (-1, 0, 908 $term->{overlay}->set (0, 0,
572 POSIX::strftime "%H:%M:%S", localtime $time); 909 sprintf "%2d:%02d:%02d", (localtime urxvt::NOW)[2,1,0]);
573 }); 910 });
574 911
575=over 4 912=over 4
576 913
577=item $timer = new urxvt::timer 914=item $timer = new urxvt::timer
578 915
579Create a new timer object in stopped state. 916Create a new timer object in started state. It is scheduled to fire
917immediately.
580 918
581=item $timer = $timer->cb (sub { my ($timer) = @_; ... }) 919=item $timer = $timer->cb (sub { my ($timer) = @_; ... })
582 920
583Set the callback to be called when the timer triggers. 921Set the callback to be called when the timer triggers.
584 922
587Return the time this watcher will fire next. 925Return the time this watcher will fire next.
588 926
589=item $timer = $timer->set ($tstamp) 927=item $timer = $timer->set ($tstamp)
590 928
591Set the time the event is generated to $tstamp. 929Set the time the event is generated to $tstamp.
930
931=item $timer = $timer->interval ($interval)
932
933Normally (and when C<$interval> is C<0>), the timer will automatically
934stop after it has fired once. If C<$interval> is non-zero, then the timer
935is automatically rescheduled at the given intervals.
592 936
593=item $timer = $timer->start 937=item $timer = $timer->start
594 938
595Start the timer. 939Start the timer.
596 940
659This variable controls the verbosity level of the perl extension. Higher 1003This variable controls the verbosity level of the perl extension. Higher
660numbers indicate more verbose output. 1004numbers indicate more verbose output.
661 1005
662=over 4 1006=over 4
663 1007
664=item 0 - only fatal messages 1008=item =0 - only fatal messages
665 1009
666=item 3 - script loading and management 1010=item =3 - script loading and management
667 1011
668=item 10 - all events received 1012=item =10 - all events received
669 1013
670=back 1014=back
671 1015
672=head1 AUTHOR 1016=head1 AUTHOR
673 1017

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