ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/rxvt-unicode/src/urxvt.pm
(Generate patch)

Comparing rxvt-unicode/src/urxvt.pm (file contents):
Revision 1.42 by root, Fri Jan 6 21:06:09 2006 UTC vs.
Revision 1.57 by root, Sun Jan 8 08:43:11 2006 UTC

17 17
18 @@RXVT_NAME@@ --perl-lib $HOME -pe grab_test 18 @@RXVT_NAME@@ --perl-lib $HOME -pe grab_test
19 19
20=head1 DESCRIPTION 20=head1 DESCRIPTION
21 21
22Everytime a terminal object gets created, scripts specified via the 22Everytime a terminal object gets created, extension scripts specified via
23C<perl> resource are loaded and associated with it. 23the C<perl> resource are loaded and associated with it.
24 24
25Scripts are compiled in a 'use strict' and 'use utf8' environment, and 25Scripts are compiled in a 'use strict' and 'use utf8' environment, and
26thus must be encoded as UTF-8. 26thus must be encoded as UTF-8.
27 27
28Each 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
37 37
38 @@RXVT_NAME@@ -pe <extensionname> 38 @@RXVT_NAME@@ -pe <extensionname>
39 39
40=over 4 40=over 4
41 41
42=item selection 42=item selection (enabled by default)
43 43
44Intelligent selection. This extension tries to be more intelligent when 44Intelligent selection. This extension tries to be more intelligent when
45the user extends selections (double-click). Right now, it tries to select 45the user extends selections (double-click). Right now, it tries to select
46urls and complete shell-quoted arguments, which is very convenient, too, 46urls and complete shell-quoted arguments, which is very convenient, too,
47if your F<ls> supports C<--quoting-style=shell>. 47if your F<ls> supports C<--quoting-style=shell>.
55Rot-13 the selection when activated. Used via keyboard trigger: 55Rot-13 the selection when activated. Used via keyboard trigger:
56 56
57 URxvt.keysym.C-M-r: perl:selection:rot13 57 URxvt.keysym.C-M-r: perl:selection:rot13
58 58
59=back 59=back
60
61=item option-popup (enabled by default)
62
63Binds a popup menu to Ctrl-Button3 that lets you toggle (some) options at
64runtime.
60 65
61=item digital-clock 66=item digital-clock
62 67
63Displays a digital clock using the built-in overlay. 68Displays a digital clock using the built-in overlay.
64 69
116 121
117=back 122=back
118 123
119=head2 Hooks 124=head2 Hooks
120 125
121The following subroutines can be declared in loaded scripts, and will be 126The following subroutines can be declared in extension files, and will be
122called whenever the relevant event happens. 127called whenever the relevant event happens.
123 128
124The first argument passed to them is an object private to each terminal 129The first argument passed to them is an object private to each terminal
125and extension package. You can call all C<urxvt::term> methods on it, but 130and extension package. You can call all C<urxvt::term> methods on it, but
126its not a real C<urxvt::term> object. Instead, the real C<urxvt::term> 131its not a real C<urxvt::term> object. Instead, the real C<urxvt::term>
127object that is shared between all packages is stored in the C<term> 132object that is shared between all packages is stored in the C<term>
128member. 133member. It is, however, blessed intot he package of the extension script,
134so for all practical purposes you can treat an extension script as a class.
129 135
130All of them must return a boolean value. If it is true, then the event 136All of them must return a boolean value. If it is true, then the event
131counts as being I<consumed>, and the invocation of other hooks is skipped, 137counts as being I<consumed>, and the invocation of other hooks is skipped,
132and the relevant action might not be carried out by the C++ code. 138and the relevant action might not be carried out by the C++ code.
133 139
177click) and is either supposed to return false (normal operation), or 183click) and is either supposed to return false (normal operation), or
178should extend the selection itelf and return true to suppress the built-in 184should extend the selection itelf and return true to suppress the built-in
179processing. 185processing.
180 186
181See the F<selection> example extension. 187See the F<selection> example extension.
182
183=item on_focus_in $term
184
185Called whenever the window gets the keyboard focus, before urxvt does
186focus in processing.
187
188=item on_focus_out $term
189
190Called wheneever the window loses keyboard focus, before urxvt does focus
191out processing.
192 188
193=item on_view_change $term, $offset 189=item on_view_change $term, $offset
194 190
195Called whenever the view offset changes, i..e the user or program 191Called whenever the view offset changes, i..e the user or program
196scrolls. Offset C<0> means display the normal terminal, positive values 192scrolls. Offset C<0> means display the normal terminal, positive values
260 256
261Called whenever the user presses a key combination that has a 257Called whenever the user presses a key combination that has a
262C<perl:string> action bound to it (see description of the B<keysym> 258C<perl:string> action bound to it (see description of the B<keysym>
263resource in the @@RXVT_NAME@@(1) manpage). 259resource in the @@RXVT_NAME@@(1) manpage).
264 260
261=item on_focus_in $term
262
263Called whenever the window gets the keyboard focus, before rxvt-unicode
264does focus in processing.
265
266=item on_focus_out $term
267
268Called wheneever the window loses keyboard focus, before rxvt-unicode does
269focus out processing.
270
265=item on_key_press $term, $event, $octets 271=item on_key_press $term, $event, $octets
266 272
267=item on_key_release $term, $event 273=item on_key_release $term, $event
268 274
269=item on_button_press $term, $event 275=item on_button_press $term, $event
270 276
271=item on_button_release $term, $event 277=item on_button_release $term, $event
272 278
273=item on_motion_notify $term, $event 279=item on_motion_notify $term, $event
280
281=item on_map_notify $term, $event
282
283=item on_unmap_notify $term, $event
274 284
275Called whenever the corresponding X event is received for the terminal If 285Called whenever the corresponding X event is received for the terminal If
276the hook returns true, then the even will be ignored by rxvt-unicode. 286the hook returns true, then the even will be ignored by rxvt-unicode.
277 287
278The event is a hash with most values as named by Xlib (see the XEvent 288The event is a hash with most values as named by Xlib (see the XEvent
290 300
291=over 4 301=over 4
292 302
293=item $urxvt::TERM 303=item $urxvt::TERM
294 304
295The current terminal. Whenever a callback/Hook is bein executed, this 305The current terminal. This variable stores the current C<urxvt::term>
296variable stores the current C<urxvt::term> object. 306object, whenever a callback/hook is executing.
297 307
298=back 308=back
299 309
300=head2 Functions in the C<urxvt> Package 310=head2 Functions in the C<urxvt> Package
301 311
326 336
327=item $time = urxvt::NOW 337=item $time = urxvt::NOW
328 338
329Returns the "current time" (as per the event loop). 339Returns the "current time" (as per the event loop).
330 340
341=item urxvt::CurrentTime
342
343=item urxvt::ShiftMask, LockMask, ControlMask, Mod1Mask, Mod2Mask,
344Mod3Mask, Mod4Mask, Mod5Mask, Button1Mask, Button2Mask, Button3Mask,
345Button4Mask, Button5Mask, AnyModifier
346
347Various constants for use in X calls and event processing.
348
331=back 349=back
332 350
333=head2 RENDITION 351=head2 RENDITION
334 352
335Rendition bitsets contain information about colour, font, font styles and 353Rendition bitsets contain information about colour, font, font styles and
384 402
385=cut 403=cut
386 404
387package urxvt; 405package urxvt;
388 406
407use utf8;
389use strict; 408use strict;
390use Scalar::Util (); 409use Scalar::Util ();
410use List::Util ();
391 411
412our $VERSION = 1;
392our $TERM; 413our $TERM;
393our @HOOKNAME; 414our @HOOKNAME;
415our %OPTION;
394our $LIBDIR; 416our $LIBDIR;
395 417
396BEGIN { 418BEGIN {
397 urxvt->bootstrap; 419 urxvt->bootstrap;
398 420
428 $hook_count[$htype]++ 450 $hook_count[$htype]++
429 or set_should_invoke $htype, 1; 451 or set_should_invoke $htype, 1;
430 } 452 }
431} 453}
432 454
433my $script_pkg = "script0000"; 455my $extension_pkg = "extension0000";
434my %script_pkg; 456my %extension_pkg;
435 457
436# load a single script into its own package, once only 458# load a single script into its own package, once only
437sub script_package($) { 459sub extension_package($) {
438 my ($path) = @_; 460 my ($path) = @_;
439 461
440 $script_pkg{$path} ||= do { 462 $extension_pkg{$path} ||= do {
441 my $pkg = "urxvt::" . ($script_pkg++); 463 my $pkg = "urxvt::" . ($extension_pkg++);
442 464
443 verbose 3, "loading script '$path' into package '$pkg'"; 465 verbose 3, "loading extension '$path' into package '$pkg'";
444 466
445 open my $fh, "<:raw", $path 467 open my $fh, "<:raw", $path
446 or die "$path: $!"; 468 or die "$path: $!";
447 469
448 my $source = "package $pkg; use strict; use utf8;\n" 470 my $source = "package $pkg; use strict; use utf8;\n"
471 . "use base urxvt::term::proxy::;\n"
449 . "#line 1 \"$path\"\n{\n" 472 . "#line 1 \"$path\"\n{\n"
450 . (do { local $/; <$fh> }) 473 . (do { local $/; <$fh> })
451 . "\n};\n1"; 474 . "\n};\n1";
475
476 $source =~ /(.*)/s and $source = $1; # untaint
452 477
453 eval $source or die "$path: $@"; 478 eval $source or die "$path: $@";
454 479
455 $pkg 480 $pkg
456 } 481 }
463 local $TERM = shift; 488 local $TERM = shift;
464 my $htype = shift; 489 my $htype = shift;
465 490
466 if ($htype == 0) { # INIT 491 if ($htype == 0) { # INIT
467 my @dirs = ((split /:/, $TERM->resource ("perl_lib")), "$LIBDIR/perl"); 492 my @dirs = ((split /:/, $TERM->resource ("perl_lib")), "$LIBDIR/perl");
493
494 my %want_ext;
468 495
469 for my $ext (map { split /,/, $TERM->resource ("perl_ext_$_") } 1, 2) { 496 for (map { split /,/, $TERM->resource ("perl_ext_$_") } 1, 2) {
497 if ($_ eq "default") {
498 $want_ext{$_}++ for qw(selection option-popup);
499 } elsif (/^-(.*)$/) {
500 delete $want_ext{$1};
501 } else {
502 $want_ext{$_}++;
503 }
504 }
505
506 for my $ext (keys %want_ext) {
470 my @files = grep -f $_, map "$_/$ext", @dirs; 507 my @files = grep -f $_, map "$_/$ext", @dirs;
471 508
472 if (@files) { 509 if (@files) {
473 register_package script_package $files[0]; 510 register_package extension_package $files[0];
474 } else { 511 } else {
475 warn "perl extension '$ext' not found in perl library search path\n"; 512 warn "perl extension '$ext' not found in perl library search path\n";
476 } 513 }
477 } 514 }
515
516 eval "#line 1 \"--perl-eval resource/argument\"\n" . $TERM->resource ("perl_eval");
517 warn $@ if $@;
478 } 518 }
479 519
480 $retval = undef; 520 $retval = undef;
481 521
482 if (my $cb = $TERM->{_hook}[$htype]) { 522 if (my $cb = $TERM->{_hook}[$htype]) {
484 if $verbosity >= 10; 524 if $verbosity >= 10;
485 525
486 keys %$cb; 526 keys %$cb;
487 527
488 while (my ($pkg, $cb) = each %$cb) { 528 while (my ($pkg, $cb) = each %$cb) {
529 eval {
489 $retval = $cb->( 530 $retval = $cb->(
490 $TERM->{_pkg}{$pkg} ||= do { 531 $TERM->{_pkg}{$pkg} ||= do {
491 my $proxy = bless { }, urxvt::term::proxy::; 532 my $proxy = bless { }, $pkg;
492 Scalar::Util::weaken ($proxy->{term} = $TERM); 533 Scalar::Util::weaken ($proxy->{term} = $TERM);
493 $proxy 534 $proxy
494 }, 535 },
495 @_, 536 @_,
496 ) and last; 537 ) and last;
538 };
539 warn $@ if $@;#d#
497 } 540 }
498 } 541 }
499 542
500 if ($htype == 1) { # DESTROY 543 if ($htype == 1) { # DESTROY
501 # remove hooks if unused 544 # remove hooks if unused
514 } 557 }
515 558
516 $retval 559 $retval
517} 560}
518 561
562# urxvt::term::proxy
563
519sub urxvt::term::proxy::AUTOLOAD { 564sub urxvt::term::proxy::AUTOLOAD {
520 $urxvt::term::proxy::AUTOLOAD =~ /:([^:]+)$/ 565 $urxvt::term::proxy::AUTOLOAD =~ /:([^:]+)$/
521 or die "FATAL: \$AUTOLOAD '$urxvt::term::proxy::AUTOLOAD' unparsable"; 566 or die "FATAL: \$AUTOLOAD '$urxvt::term::proxy::AUTOLOAD' unparsable";
522 567
523 eval qq{ 568 eval qq{
529 } or die "FATAL: unable to compile method forwarder: $@"; 574 } or die "FATAL: unable to compile method forwarder: $@";
530 575
531 goto &$urxvt::term::proxy::AUTOLOAD; 576 goto &$urxvt::term::proxy::AUTOLOAD;
532} 577}
533 578
579# urxvt::destroy_hook
580
581sub urxvt::destroy_hook::DESTROY {
582 ${$_[0]}->();
583}
584
585sub urxvt::destroy_hook(&) {
586 bless \shift, urxvt::destroy_hook::
587}
588
589package urxvt::anyevent;
590
591=head2 The C<urxvt::anyevent> Class
592
593The sole purpose of this class is to deliver an interface to the
594C<AnyEvent> module - any module using it will work inside urxvt without
595further work. The only exception is that you cannot wait on condition
596variables, but non-blocking condvar use is ok. What this means is that you
597cannot use blocking APIs, but the non-blocking variant should work.
598
599=cut
600
601our $VERSION = 1;
602
603$INC{"urxvt/anyevent.pm"} = 1; # mark us as there
604push @AnyEvent::REGISTRY, [urxvt => urxvt::anyevent::];
605
606sub timer {
607 my ($class, %arg) = @_;
608
609 my $cb = $arg{cb};
610
611 urxvt::timer
612 ->new
613 ->start (urxvt::NOW + $arg{after})
614 ->cb (sub {
615 $_[0]->stop; # need to cancel manually
616 $cb->();
617 })
618}
619
620sub io {
621 my ($class, %arg) = @_;
622
623 my $cb = $arg{cb};
624
625 bless [$arg{fh}, urxvt::iow
626 ->new
627 ->fd (fileno $arg{fh})
628 ->events (($arg{poll} =~ /r/ ? 1 : 0)
629 | ($arg{poll} =~ /w/ ? 2 : 0))
630 ->start
631 ->cb (sub {
632 $cb->(($_[1] & 1 ? 'r' : '')
633 . ($_[1] & 2 ? 'w' : ''));
634 })],
635 urxvt::anyevent::
636}
637
638sub DESTROY {
639 $_[0][1]->stop;
640}
641
642sub condvar {
643 bless \my $flag, urxvt::anyevent::condvar::
644}
645
646sub urxvt::anyevent::condvar::broadcast {
647 ${$_[0]}++;
648}
649
650sub urxvt::anyevent::condvar::wait {
651 unless (${$_[0]}) {
652 require Carp;
653 Carp::croak ("AnyEvent->condvar blocking wait unsupported in urxvt, use a non-blocking API");
654 }
655}
656
657package urxvt::term;
658
534=head2 The C<urxvt::term> Class 659=head2 The C<urxvt::term> Class
535 660
536=over 4 661=over 4
537 662
538=item $term->destroy 663=item $term->destroy
539 664
540Destroy the terminal object (close the window, free resources etc.). 665Destroy the terminal object (close the window, free resources etc.).
666
667=item $isset = $term->option ($optval[, $set])
668
669Returns true if the option specified by C<$optval> is enabled, and
670optionally change it. All option values are stored by name in the hash
671C<%urxvt::OPTION>. Options not enabled in this binary are not in the hash.
672
673Here is a a likely non-exhaustive list of option names, please see the
674source file F</src/optinc.h> to see the actual list:
675
676 borderLess console cursorBlink cursorUnderline hold iconic insecure
677 intensityStyles jumpScroll loginShell mapAlert meta8 mouseWheelScrollPage
678 pastableTabs pointerBlank reverseVideo scrollBar scrollBar_floating
679 scrollBar_right scrollTtyKeypress scrollTtyOutput scrollWithBuffer
680 secondaryScreen secondaryScroll skipBuiltinGlyphs transparent
681 tripleclickwords utmpInhibit visualBell
541 682
542=item $value = $term->resource ($name[, $newval]) 683=item $value = $term->resource ($name[, $newval])
543 684
544Returns the current resource value associated with a given name and 685Returns the current resource value associated with a given name and
545optionally sets a new value. Setting values is most useful in the C<init> 686optionally sets a new value. Setting values is most useful in the C<init>
555 696
556Please note that resource strings will currently only be freed when the 697Please note that resource strings will currently only be freed when the
557terminal is destroyed, so changing options frequently will eat memory. 698terminal is destroyed, so changing options frequently will eat memory.
558 699
559Here is a a likely non-exhaustive list of resource names, not all of which 700Here is a a likely non-exhaustive list of resource names, not all of which
560are supported in every build, please see the source to see the actual 701are supported in every build, please see the source file F</src/rsinc.h>
561list: 702to see the actual list:
562 703
563 answerbackstring backgroundPixmap backspace_key boldFont boldItalicFont 704 answerbackstring backgroundPixmap backspace_key boldFont boldItalicFont
564 borderLess color cursorBlink cursorUnderline cutchars delete_key 705 borderLess color cursorBlink cursorUnderline cutchars delete_key
565 display_name embed ext_bwidth fade font geometry hold iconName 706 display_name embed ext_bwidth fade font geometry hold iconName
566 imFont imLocale inputMethod insecure int_bwidth intensityStyles 707 imFont imLocale inputMethod insecure int_bwidth intensityStyles
573 shade term_name title transparent transparent_all tripleclickwords 714 shade term_name title transparent transparent_all tripleclickwords
574 utmpInhibit visualBell 715 utmpInhibit visualBell
575 716
576=cut 717=cut
577 718
578sub urxvt::term::resource($$;$) { 719sub resource($$;$) {
579 my ($self, $name) = (shift, shift); 720 my ($self, $name) = (shift, shift);
580 unshift @_, $self, $name, ($name =~ s/\s*\+\s*(\d+)$// ? $1 : 0); 721 unshift @_, $self, $name, ($name =~ s/\s*\+\s*(\d+)$// ? $1 : 0);
581 goto &urxvt::term::_resource; 722 &urxvt::term::_resource
582} 723}
583 724
584=item $rend = $term->rstyle ([$new_rstyle]) 725=item $rend = $term->rstyle ([$new_rstyle])
585 726
586Return and optionally change the current rendition. Text that is output by 727Return and optionally change the current rendition. Text that is output by
662 803
663If hidden, display the overlay again. 804If hidden, display the overlay again.
664 805
665=back 806=back
666 807
808=item $popup = $term->popup ($event)
809
810Creates a new C<urxvt::popup> object that implements a popup menu. The
811C<$event> I<must> be the event causing the menu to pop up (a button event,
812currently).
813
814=cut
815
816sub popup {
817 my ($self, $event) = @_;
818
819 $self->grab ($event->{time}, 1)
820 or return;
821
822 my $popup = bless {
823 term => $self,
824 event => $event,
825 }, urxvt::popup::;
826
827 Scalar::Util::weaken $popup->{term};
828
829 $self->{_destroy}{$popup} = urxvt::destroy_hook { $popup->{popup}->destroy };
830 Scalar::Util::weaken $self->{_destroy}{$popup};
831
832 $popup
833}
834
667=item $cellwidth = $term->strwidth ($string) 835=item $cellwidth = $term->strwidth ($string)
668 836
669Returns the number of screen-cells this string would need. Correctly 837Returns the number of screen-cells this string would need. Correctly
670accounts for wide and combining characters. 838accounts for wide and combining characters.
671 839
731=item $nrow_plus_saveLines = $term->total_rows 899=item $nrow_plus_saveLines = $term->total_rows
732 900
733=item $lines_in_scrollback = $term->nsaved 901=item $lines_in_scrollback = $term->nsaved
734 902
735Return various integers describing terminal characteristics. 903Return various integers describing terminal characteristics.
904
905=item $modifiermask = $term->ModLevel3Mask
906
907=item $modifiermask = $term->ModMetaMask
908
909=item $modifiermask = $term->ModNumLockMask
910
911Return the modifier masks corresponding to the "ISO Level 3 Shift" (often
912AltGr), the meta key (often Alt) and the num lock key, if applicable.
736 913
737=item $view_start = $term->view_start ([$newvalue]) 914=item $view_start = $term->view_start ([$newvalue])
738 915
739Returns the negative row number of the topmost line. Minimum value is 916Returns the negative row number of the topmost line. Minimum value is
740C<0>, which displays the normal terminal contents. Larger values scroll 917C<0>, which displays the normal terminal contents. Larger values scroll
834 1011
835=back 1012=back
836 1013
837=cut 1014=cut
838 1015
839sub urxvt::term::line { 1016sub line {
840 my ($self, $row) = @_; 1017 my ($self, $row) = @_;
841 1018
842 my $maxrow = $self->nrow - 1; 1019 my $maxrow = $self->nrow - 1;
843 1020
844 my ($beg, $end) = ($row, $row); 1021 my ($beg, $end) = ($row, $row);
921 1098
922Converts rxvt-unicodes text reprsentation into a perl string. See 1099Converts rxvt-unicodes text reprsentation into a perl string. See
923C<< $term->ROW_t >> for details. 1100C<< $term->ROW_t >> for details.
924 1101
925=back 1102=back
1103
1104=cut
1105
1106package urxvt::popup;
1107
1108=head2 The C<urxvt::popup> Class
1109
1110=over 4
1111
1112=cut
1113
1114sub add_item {
1115 my ($self, $item) = @_;
1116
1117 $item->{rend}{normal} = "\x1b[0;30;47m" unless exists $item->{rend}{normal};
1118 $item->{rend}{hover} = "\x1b[0;30;46m" unless exists $item->{rend}{hover};
1119 $item->{rend}{active} = "\x1b[m" unless exists $item->{rend}{active};
1120
1121 $item->{render} ||= sub { $_[0]{text} };
1122
1123 push @{ $self->{item} }, $item;
1124}
1125
1126sub add_separator {
1127 my ($self, $sep) = @_;
1128
1129 $sep ||= "═";
1130
1131 $self->add_item ({
1132 rend => { normal => "\x1b[0;30;47m", hover => "\x1b[0;30;47m", active => "\x1b[0;30;47m" },
1133 text => "",
1134 render => sub { $sep x $urxvt::TERM->ncol },
1135 activate => sub { },
1136 });
1137}
1138
1139sub add_title {
1140 my ($self, $title) = @_;
1141
1142 $self->add_item ({
1143 rend => { normal => "\x1b[38;5;11;44m", hover => "\x1b[38;5;11;44m", active => "\x1b[38;5;11;44m" },
1144 text => $title,
1145 activate => sub { },
1146 });
1147}
1148
1149sub add_button {
1150 my ($self, $text, $cb) = @_;
1151
1152 $self->add_item ({ type => "button", text => "[ $text ]", activate => $cb});
1153}
1154
1155sub add_toggle {
1156 my ($self, $text, $cb, $value) = @_;
1157
1158 my $item; $item = {
1159 type => "button",
1160 text => " $text",
1161 value => $value,
1162 render => sub { ($item->{value} ? "* " : " ") . $text },
1163 activate => sub { $cb->($item->{value} = !$item->{value}); },
1164 };
1165
1166 $self->add_item ($item);
1167}
1168
1169sub show {
1170 my ($self) = @_;
1171
1172 local $urxvt::popup::self = $self;
1173
1174 urxvt->new ("--perl-lib" => "", "--perl-ext-common" => "", "-pty-fd" => -1, "-sl" => 0, "-b" => 0,
1175 "--transient-for" => $self->{term}->parent,
1176 "-pe" => "urxvt-popup")
1177 or die "unable to create popup window\n";
1178}
1179
1180sub DESTROY {
1181 my ($self) = @_;
1182
1183 $self->{term}->ungrab;
1184}
926 1185
927=head2 The C<urxvt::timer> Class 1186=head2 The C<urxvt::timer> Class
928 1187
929This class implements timer watchers/events. Time is represented as a 1188This class implements timer watchers/events. Time is represented as a
930fractional number of seconds since the epoch. Example: 1189fractional number of seconds since the epoch. Example:

Diff Legend

Removed lines
+ Added lines
< Changed lines
> Changed lines