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Revision 1.5 by root, Mon Jan 2 17:20:00 2006 UTC vs.
Revision 1.91 by root, Fri Jan 13 01:09:37 2006 UTC

		1	=encoding utf8
		2
1	=head1 NAME	3	=head1 NAME
2		4
3	rxvtperl - rxvt-unicode's embedded perl interpreter	5	@@RXVT_NAME@@perl - rxvt-unicode's embedded perl interpreter
4		6
5	=head1 SYNOPSIS	7	=head1 SYNOPSIS
6		8
7	* Put your scripts into F<@@RXVT_LIBDIR@@/urxvt/perl-ext/>, they will be loaded automatically.	9	# create a file grab_test in $HOME:
8
9	* Each script will only be loaded once, even in urxvtd, and will be valid
10	globally.
11
12	* Scripts are evaluated in a 'use strict' and 'use utf8' environment, and
13	thus must be encoded as UTF-8.
14		10
15	sub on_sel_grab {	11	sub on_sel_grab {
16	warn "you selected ", $_[0]->selection;	12	warn "you selected ", $_[0]->selection;
17	()	13	()
18	}	14	}
19		15
20	1	16	# start a @@RXVT_NAME@@ using it:
		17
		18	@@RXVT_NAME@@ --perl-lib $HOME -pe grab_test
21		19
22	=head1 DESCRIPTION	20	=head1 DESCRIPTION
23		21
		22	Everytime a terminal object gets created, extension scripts specified via
		23	the C<perl> resource are loaded and associated with it.
		24
		25	Scripts are compiled in a 'use strict' and 'use utf8' environment, and
		26	thus must be encoded as UTF-8.
		27
		28	Each script will only ever be loaded once, even in @@RXVT_NAME@@d, where
		29	scripts will be shared (but not enabled) for all terminals.
		30
		31	=head1 PREPACKAGED EXTENSIONS
		32
		33	This section describes the extensions delivered with this release. You can
		34	find them in F<@@RXVT_LIBDIR@@/urxvt/perl/>.
		35
		36	You can activate them like this:
		37
		38	@@RXVT_NAME@@ -pe <extensionname>
		39
		40	=over 4
		41
		42	=item selection (enabled by default)
		43
		44	(More) intelligent selection. This extension tries to be more intelligent
		45	when the user extends selections (double-click and further clicks). Right
		46	now, it tries to select words, urls and complete shell-quoted
		47	arguments, which is very convenient, too, if your F<ls> supports
		48	C<--quoting-style=shell>.
		49
		50	A double-click usually selects the word under the cursor, further clicks
		51	will enlarge the selection.
		52
		53	The selection works by trying to match a number of regexes and displaying
		54	them in increasing order of length. You can add your own regexes by
		55	specifying resources of the form:
		56
		57	URxvt.selection.pattern-0: perl-regex
		58	URxvt.selection.pattern-1: perl-regex
		59	...
		60
		61	The index number (0, 1...) must not have any holes, and each regex must
		62	contain at least one pair of capturing parentheses, which will be used for
		63	the match. For example, the followign adds a regex that matches everything
		64	between two vertical bars:
		65
		66	URxvt.selection.pattern-0: \\|([^|]+)\\|
		67
		68	You can look at the source of the selection extension to see more
		69	interesting uses, such as parsing a line from beginning to end.
		70
		71	This extension also offers the following bindable keyboard command:
		72
		73	=over 4
		74
		75	=item rot13
		76
		77	Rot-13 the selection when activated. Used via keyboard trigger:
		78
		79	URxvt.keysym.C-M-r: perl:selection:rot13
		80
		81	=back
		82
		83	=item option-popup (enabled by default)
		84
		85	Binds a popup menu to Ctrl-Button2 that lets you toggle (some) options at
		86	runtime.
		87
		88	=item selection-popup (enabled by default)
		89
		90	Binds a popup menu to Ctrl-Button3 that lets you convert the selection
		91	text into various other formats/action (such as uri unescaping, perl
		92	evalution, web-browser starting etc.), depending on content.
		93
		94	=item searchable-scrollback<hotkey> (enabled by default)
		95
		96	Adds regex search functionality to the scrollback buffer, triggered
		97	by a hotkey (default: C<M-s>). While in search mode, normal terminal
		98	input/output is suspended and a regex is displayed at the bottom of the
		99	screen.
		100
		101	Inputting characters appends them to the regex and continues incremental
		102	search. C<BackSpace> removes a character from the regex, C<Up> and C<Down>
		103	search upwards/downwards in the scrollback buffer, C<End> jumps to the
		104	bottom. C<Escape> leaves search mode and returns to the point where search
		105	was started, while C<Enter> or C<Return> stay at the current position and
		106	additionally stores the first match in the current line into the primary
		107	selection.
		108
		109	=item selection-autotransform
		110
		111	This selection allows you to do automatic transforms on a selection
		112	whenever a selection is made.
		113
		114	It works by specifying perl snippets (most useful is a single C<s///>
		115	operator) that modify C<$_> as resources:
		116
		117	URxvt.selection-autotransform.0: transform
		118	URxvt.selection-autotransform.1: transform
		119	...
		120
		121	For example, the following will transform selections of the form
		122	C<filename:number>, often seen in compiler messages, into C<vi +$filename
		123	$word>:
		124
		125	URxvt.selection-autotransform.0: s/^(\\S+):(\\d+):?$/vi +$2 \\Q$1\\E\\x0d/
		126
		127	And this example matches the same,but replaces it with vi-commands you can
		128	paste directly into your (vi :) editor:
		129
		130	URxvt.selection-autotransform.0: s/^(S+):(d+):?$/\\x1b:e \\Q$1\\E\\x0d:$2\\x0d/
		131
		132	Of course, this can be modified to suit your needs and your editor :)
		133
		134	To expand the example above to typical perl error messages ("XXX at
		135	FILENAME line YYY."), you need a slightly more elaborate solution:
		136
		137	URxvt.selection.pattern-0: ( at .*? line \\d+\\.)
		138	URxvt.selection-autotransform.0: s/^ at (.*?) line (\\d+)\\.$/\x1b:e \\Q$1\E\\x0d:$2\\x0d/
		139
		140	The first line tells the selection code to treat the unchanging part of
		141	every error message as a selection pattern, and the second line transforms
		142	the message into vi commands to load the file.
		143
		144	=item mark-urls
		145
		146	Uses per-line display filtering (C<on_line_update>) to underline urls and
		147	make them clickable. When middle-clicked, the program specified in the
		148	resource C<urlLauncher> (default C<x-www-browser>) will be started with
		149	the URL as first argument.
		150
		151	=item block-graphics-to-ascii
		152
		153	A not very useful example of filtering all text output to the terminal,
		154	by replacing all line-drawing characters (U+2500 .. U+259F) by a
		155	similar-looking ascii character.
		156
		157	=item digital-clock
		158
		159	Displays a digital clock using the built-in overlay.
		160
		161	=item example-refresh-hooks
		162
		163	Displays a very simple digital clock in the upper right corner of the
		164	window. Illustrates overwriting the refresh callbacks to create your own
		165	overlays or changes.
		166
		167	=back
		168
		169	=head1 API DOCUMENTATION
		170
		171	=head2 General API Considerations
		172
		173	All objects (such as terminals, time watchers etc.) are typical
		174	reference-to-hash objects. The hash can be used to store anything you
		175	like. All members starting with an underscore (such as C<_ptr> or
		176	C<_hook>) are reserved for internal uses and B<MUST NOT> be accessed or
		177	modified).
		178
		179	When objects are destroyed on the C++ side, the perl object hashes are
		180	emptied, so its best to store related objects such as time watchers and
		181	the like inside the terminal object so they get destroyed as soon as the
		182	terminal is destroyed.
		183
		184	Argument names also often indicate the type of a parameter. Here are some
		185	hints on what they mean:
		186
		187	=over 4
		188
		189	=item $text
		190
		191	Rxvt-unicodes special way of encoding text, where one "unicode" character
		192	always represents one screen cell. See L<ROW_t> for a discussion of this format.
		193
		194	=item $string
		195
		196	A perl text string, with an emphasis on I<text>. It can store all unicode
		197	characters and is to be distinguished with text encoded in a specific
		198	encoding (often locale-specific) and binary data.
		199
		200	=item $octets
		201
		202	Either binary data or - more common - a text string encoded in a
		203	locale-specific way.
		204
		205	=back
		206
		207	=head2 Extension Objects
		208
		209	Very perl extension is a perl class. A separate perl object is created
		210	for each terminal and each extension and passed as the first parameter to
		211	hooks. So extensions can use their C<$self> object without having to think
		212	about other extensions, with the exception of methods and members that
		213	begin with an underscore character C<_>: these are reserved for internal
		214	use.
		215
		216	Although it isn't a C<urxvt::term> object, you can call all methods of the
		217	C<urxvt::term> class on this object.
		218
		219	It has the following methods and data members:
		220
		221	=over 4
		222
		223	=item $urxvt_term = $self->{term}
		224
		225	Returns the C<urxvt::term> object associated with this instance of the
		226	extension. This member I<must not> be changed in any way.
		227
		228	=item $self->enable ($hook_name => $cb, [$hook_name => $cb..])
		229
		230	Dynamically enable the given hooks (named without the C<on_> prefix) for
		231	this extension, replacing any previous hook. This is useful when you want
		232	to overwrite time-critical hooks only temporarily.
		233
		234	=item $self->disable ($hook_name[, $hook_name..])
		235
		236	Dynamically disable the given hooks.
		237
		238	=back
		239
24	=head2 Hooks	240	=head2 Hooks
25		241
26	The following subroutines can be declared in loaded scripts, and will be called	242	The following subroutines can be declared in extension files, and will be
27	whenever the relevant event happens.	243	called whenever the relevant event happens.
28		244
		245	The first argument passed to them is an extension oject as described in
		246	the in the C<Extension Objects> section.
		247
29	All of them must return a boolean value. If it is true, then the event	248	B<All> of these hooks must return a boolean value. If it is true, then the
30	counts as being I<consumed>, and the invocation of other hooks is skipped,	249	event counts as being I<consumed>, and the invocation of other hooks is
31	and the relevant action might not be carried out by the C++ code.	250	skipped, and the relevant action might not be carried out by the C++ code.
32		251
33	When in doubt, return a false value (preferably C<()>).	252	I<< When in doubt, return a false value (preferably C<()>). >>
34		253
35	=over 4	254	=over 4
36		255
37	=item on_init $term	256	=item on_init $term
38		257
39	Called after a new terminal object has been initialized, but before	258	Called after a new terminal object has been initialized, but before
40	windows are created or the command gets run.	259	windows are created or the command gets run. Most methods are unsafe to
		260	call or deliver senseless data, as terminal size and other characteristics
		261	have not yet been determined. You can safely query and change resources,
		262	though.
41		263
42	=item on_reset $term	264	=item on_reset $term
43		265
44	Called after the screen is "reset" for any reason, such as resizing or	266	Called after the screen is "reset" for any reason, such as resizing or
45	control sequences. Here is where you can react on changes to size-related	267	control sequences. Here is where you can react on changes to size-related
…		…
65	requested from the server. The selection text can be queried and changed	287	requested from the server. The selection text can be queried and changed
66	by calling C<< $term->selection >>.	288	by calling C<< $term->selection >>.
67		289
68	Returning a true value aborts selection grabbing. It will still be hilighted.	290	Returning a true value aborts selection grabbing. It will still be hilighted.
69		291
70	=item on_focus_in $term	292	=item on_sel_extend $term
71		293
72	Called whenever the window gets the keyboard focus, before urxvt does	294	Called whenever the user tries to extend the selection (e.g. with a double
73	focus in processing.	295	click) and is either supposed to return false (normal operation), or
		296	should extend the selection itelf and return true to suppress the built-in
		297	processing. This can happen multiple times, as long as the callback
		298	returns true, it will be called on every further click by the user and is
		299	supposed to enlarge the selection more and more, if possible.
74		300
75	=item on_focus_out $term	301	See the F<selection> example extension.
76
77	Called wheneever the window loses keyboard focus, before urxvt does focus
78	out processing.
79		302
80	=item on_view_change $term, $offset	303	=item on_view_change $term, $offset
81		304
82	Called whenever the view offset changes, i..e the user or program	305	Called whenever the view offset changes, i..e the user or program
83	scrolls. Offset C<0> means display the normal terminal, positive values	306	scrolls. Offset C<0> means display the normal terminal, positive values
…		…
91		314
92	It is called before lines are scrolled out (so rows 0 .. min ($lines - 1,	315	It is called before lines are scrolled out (so rows 0 .. min ($lines - 1,
93	$nrow - 1) represent the lines to be scrolled out). C<$saved> is the total	316	$nrow - 1) represent the lines to be scrolled out). C<$saved> is the total
94	number of lines that will be in the scrollback buffer.	317	number of lines that will be in the scrollback buffer.
95		318
96	=item on_tty_activity $term *NYI*	319	=item on_osc_seq $term, $string
97		320
98	Called whenever the program(s) running in the urxvt window send output.	321	Called whenever the B<ESC ] 777 ; string ST> command sequence (OSC =
		322	operating system command) is processed. Cursor position and other state
		323	information is up-to-date when this happens. For interoperability, the
		324	string should start with the extension name and a colon, to distinguish
		325	it from commands for other extensions, and this might be enforced in the
		326	future.
		327
		328	Be careful not ever to trust (in a security sense) the data you receive,
		329	as its source can not easily be controleld (e-mail content, messages from
		330	other users on the same system etc.).
		331
		332	=item on_add_lines $term, $string
		333
		334	Called whenever text is about to be output, with the text as argument. You
		335	can filter/change and output the text yourself by returning a true value
		336	and calling C<< $term->scr_add_lines >> yourself. Please note that this
		337	might be very slow, however, as your hook is called for B<all> text being
		338	output.
		339
		340	=item on_tt_write $term, $octets
		341
		342	Called whenever some data is written to the tty/pty and can be used to
		343	suppress or filter tty input.
		344
		345	=item on_line_update $term, $row
		346
		347	Called whenever a line was updated or changed. Can be used to filter
		348	screen output (e.g. underline urls or other useless stuff). Only lines
		349	that are being shown will be filtered, and, due to performance reasons,
		350	not always immediately.
		351
		352	The row number is always the topmost row of the line if the line spans
		353	multiple rows.
		354
		355	Please note that, if you change the line, then the hook might get called
		356	later with the already-modified line (e.g. if unrelated parts change), so
		357	you cannot just toggle rendition bits, but only set them.
99		358
100	=item on_refresh_begin $term	359	=item on_refresh_begin $term
101		360
102	Called just before the screen gets redrawn. Can be used for overlay	361	Called just before the screen gets redrawn. Can be used for overlay
103	or similar effects by modify terminal contents in refresh_begin, and	362	or similar effects by modify terminal contents in refresh_begin, and
…		…
106		365
107	=item on_refresh_end $term	366	=item on_refresh_end $term
108		367
109	Called just after the screen gets redrawn. See C<on_refresh_begin>.	368	Called just after the screen gets redrawn. See C<on_refresh_begin>.
110		369
		370	=item on_keyboard_command $term, $string
		371
		372	Called whenever the user presses a key combination that has a
		373	C<perl:string> action bound to it (see description of the B<keysym>
		374	resource in the @@RXVT_NAME@@(1) manpage).
		375
		376	=item on_focus_in $term
		377
		378	Called whenever the window gets the keyboard focus, before rxvt-unicode
		379	does focus in processing.
		380
		381	=item on_focus_out $term
		382
		383	Called wheneever the window loses keyboard focus, before rxvt-unicode does
		384	focus out processing.
		385
		386	=item on_key_press $term, $event, $keysym, $octets
		387
		388	=item on_key_release $term, $event, $keysym
		389
		390	=item on_button_press $term, $event
		391
		392	=item on_button_release $term, $event
		393
		394	=item on_motion_notify $term, $event
		395
		396	=item on_map_notify $term, $event
		397
		398	=item on_unmap_notify $term, $event
		399
		400	Called whenever the corresponding X event is received for the terminal If
		401	the hook returns true, then the even will be ignored by rxvt-unicode.
		402
		403	The event is a hash with most values as named by Xlib (see the XEvent
		404	manpage), with the additional members C<row> and C<col>, which are the row
		405	and column under the mouse cursor.
		406
		407	C<on_key_press> additionally receives the string rxvt-unicode would
		408	output, if any, in locale-specific encoding.
		409
		410	subwindow.
		411
		412	=back
		413
		414	=cut
		415
		416	package urxvt;
		417
		418	use utf8;
		419	use strict;
		420	use Carp ();
		421	use Scalar::Util ();
		422	use List::Util ();
		423
		424	our $VERSION = 1;
		425	our $TERM;
		426	our @HOOKNAME;
		427	our %HOOKTYPE = map +($HOOKNAME[$_] => $_), 0..$#HOOKNAME;
		428	our %OPTION;
		429
		430	our $LIBDIR;
		431	our $RESNAME;
		432	our $RESCLASS;
		433	our $RXVTNAME;
		434
		435	=head2 Variables in the C<urxvt> Package
		436
		437	=over 4
		438
		439	=item $urxvt::LIBDIR
		440
		441	The rxvt-unicode library directory, where, among other things, the perl
		442	modules and scripts are stored.
		443
		444	=item $urxvt::RESCLASS, $urxvt::RESCLASS
		445
		446	The resource class and name rxvt-unicode uses to look up X resources.
		447
		448	=item $urxvt::RXVTNAME
		449
		450	The basename of the installed binaries, usually C<urxvt>.
		451
		452	=item $urxvt::TERM
		453
		454	The current terminal. This variable stores the current C<urxvt::term>
		455	object, whenever a callback/hook is executing.
		456
111	=back	457	=back
112		458
113	=head2 Functions in the C<urxvt> Package	459	=head2 Functions in the C<urxvt> Package
114		460
115	=over 4	461	=over 4
…		…
120	costs! The only time this is acceptable is when the terminal process	466	costs! The only time this is acceptable is when the terminal process
121	starts up.	467	starts up.
122		468
123	=item urxvt::warn $string	469	=item urxvt::warn $string
124		470
125	Calls C<rxvt_warn> witht eh given string which should not include a	471	Calls C<rxvt_warn> with the given string which should not include a
126	newline. The module also overwrites the C<warn> builtin with a function	472	newline. The module also overwrites the C<warn> builtin with a function
127	that calls this function.	473	that calls this function.
128		474
129	Using this function has the advantage that its output ends up in the	475	Using this function has the advantage that its output ends up in the
130	correct place, e.g. on stderr of the connecting urxvtc client.	476	correct place, e.g. on stderr of the connecting urxvtc client.
131		477
132	=item $cellwidth = urxvt::wcswidth $string	478	Messages have a size limit of 1023 bytes currently.
133		479
134	Returns the number of screen-cells this string would need. Correctly	480	=item $is_safe = urxvt::safe
135	accounts for wide and combining characters.	481
		482	Returns true when it is safe to do potentially unsafe things, such as
		483	evaluating perl code specified by the user. This is true when urxvt was
		484	started setuid or setgid.
136		485
137	=item $time = urxvt::NOW	486	=item $time = urxvt::NOW
138		487
139	Returns the "current time" (as per the event loop).	488	Returns the "current time" (as per the event loop).
140		489
141	=cut	490	=item urxvt::CurrentTime
142		491
143	package urxvt;	492	=item urxvt::ShiftMask, LockMask, ControlMask, Mod1Mask, Mod2Mask,
		493	Mod3Mask, Mod4Mask, Mod5Mask, Button1Mask, Button2Mask, Button3Mask,
		494	Button4Mask, Button5Mask, AnyModifier
144		495
145	use strict;	496	Various constants for use in X calls and event processing.
146		497
147	our $term;	498	=back
148	our @HOOKNAME;	499
149	our $LIBDIR;	500	=head2 RENDITION
		501
		502	Rendition bitsets contain information about colour, font, font styles and
		503	similar information for each screen cell.
		504
		505	The following "macros" deal with changes in rendition sets. You should
		506	never just create a bitset, you should always modify an existing one,
		507	as they contain important information required for correct operation of
		508	rxvt-unicode.
		509
		510	=over 4
		511
		512	=item $rend = urxvt::DEFAULT_RSTYLE
		513
		514	Returns the default rendition, as used when the terminal is starting up or
		515	being reset. Useful as a base to start when creating renditions.
		516
		517	=item $rend = urxvt::OVERLAY_RSTYLE
		518
		519	Return the rendition mask used for overlays by default.
		520
		521	=item $rendbit = urxvt::RS_Bold, RS_Italic, RS_Blink, RS_RVid, RS_Uline
		522
		523	Return the bit that enabled bold, italic, blink, reverse-video and
		524	underline, respectively. To enable such a style, just logically OR it into
		525	the bitset.
		526
		527	=item $foreground = urxvt::GET_BASEFG $rend
		528
		529	=item $background = urxvt::GET_BASEBG $rend
		530
		531	Return the foreground/background colour index, respectively.
		532
		533	=item $rend = urxvt::SET_FGCOLOR $rend, $new_colour
		534
		535	=item $rend = urxvt::SET_BGCOLOR $rend, $new_colour
		536
		537	Replace the foreground/background colour in the rendition mask with the
		538	specified one.
		539
		540	=item $value = urxvt::GET_CUSTOM $rend
		541
		542	Return the "custom" value: Every rendition has 5 bits for use by
		543	extensions. They can be set and changed as you like and are initially
		544	zero.
		545
		546	=item $rend = urxvt::SET_CUSTOM $rend, $new_value
		547
		548	Change the custom value.
		549
		550	=back
		551
		552	=cut
150		553
151	BEGIN {	554	BEGIN {
152	urxvt->bootstrap;	555	urxvt->bootstrap;
153		556
154	# overwrite perl's warn	557	# overwrite perl's warn
…		…
156	my $msg = join "", @_;	559	my $msg = join "", @_;
157	$msg .= "\n"	560	$msg .= "\n"
158	unless $msg =~ /\n$/;	561	unless $msg =~ /\n$/;
159	urxvt::warn ($msg);	562	urxvt::warn ($msg);
160	};	563	};
161	}
162		564
		565	# %ENV is the original startup environment
		566	delete $ENV{IFS};
		567	delete $ENV{CDPATH};
		568	delete $ENV{BASH_ENV};
		569	$ENV{PATH} = "/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:/opt/bin:/opt/sbin";
		570	}
		571
		572	my @hook_count;
163	my $verbosity = $ENV{URXVT_PERL_VERBOSITY} || 10;	573	my $verbosity = $ENV{URXVT_PERL_VERBOSITY};
164		574
165	sub verbose {	575	sub verbose {
166	my ($level, $msg) = @_;	576	my ($level, $msg) = @_;
167	warn "$msg\n"; #d#	577	warn "$msg\n" if $level <= $verbosity;
168	}	578	}
169		579
170	my @invoke_cb;	580	my $extension_pkg = "extension0000";
		581	my %extension_pkg;
		582
		583	# load a single script into its own package, once only
		584	sub extension_package($) {
		585	my ($path) = @_;
		586
		587	$extension_pkg{$path} ||= do {
		588	my $pkg = "urxvt::" . ($extension_pkg++);
		589
		590	verbose 3, "loading extension '$path' into package '$pkg'";
		591
		592	open my $fh, "<:raw", $path
		593	or die "$path: $!";
		594
		595	my $source = untaint
		596	"package $pkg; use strict; use utf8;\n"
		597	. "use base urxvt::term::extension::;\n"
		598	. "#line 1 \"$path\"\n{\n"
		599	. (do { local $/; <$fh> })
		600	. "\n};\n1";
		601
		602	eval $source
		603	or die "$path: $@";
		604
		605	$pkg
		606	}
		607	}
		608
		609	our $retval; # return value for urxvt
171		610
172	# called by the rxvt core	611	# called by the rxvt core
173	sub invoke {	612	sub invoke {
174	local $term = shift;	613	local $TERM = shift;
175	my $htype = shift;	614	my $htype = shift;
176		615
177	my $cb = $invoke_cb[$htype];	616	if ($htype == 0) { # INIT
		617	my @dirs = ((split /:/, $TERM->resource ("perl_lib")), "$LIBDIR/perl");
		618
		619	my %ext_arg;
178		620
179	verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $term, @_) . ")"	621	for (map { split /,/, $TERM->resource ("perl_ext_$_") } 1, 2) {
180	if $verbosity >= 10;	622	if ($_ eq "default") {
		623	$ext_arg{$_} ||= [] for qw(selection option-popup selection-popup searchable-scrollback);
		624	} elsif (/^-(.*)$/) {
		625	delete $ext_arg{$1};
		626	} elsif (/^([^<]+)<(.*)>$/) {
		627	push @{ $ext_arg{$1} }, $2;
		628	} else {
		629	$ext_arg{$_} ||= [];
		630	}
		631	}
181		632
182	while (my ($k, $v) = each %$cb) {	633	while (my ($ext, $argv) = each %ext_arg) {
183	return 1 if $v->($term, @_);	634	my @files = grep -f $_, map "$_/$ext", @dirs;
		635
		636	if (@files) {
		637	$TERM->register_package (extension_package $files[0], $argv);
		638	} else {
		639	warn "perl extension '$ext' not found in perl library search path\n";
		640	}
		641	}
		642
		643	eval "#line 1 \"--perl-eval resource/argument\"\n" . $TERM->resource ("perl_eval");
		644	warn $@ if $@;
184	}	645	}
185		646
		647	$retval = undef;
		648
		649	if (my $cb = $TERM->{_hook}[$htype]) {
		650	verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $TERM, @_) . ")"
		651	if $verbosity >= 10;
		652
		653	keys %$cb;
		654
		655	while (my ($pkg, $cb) = each %$cb) {
		656	$retval = eval { $cb->($TERM->{_pkg}{$pkg}, @_) }
		657	and last;
		658
		659	if ($@) {
		660	$TERM->ungrab; # better to lose the grab than the session
		661	warn $@;
		662	}
		663	}
		664
		665	verbose 11, "$HOOKNAME[$htype] returning <$retval>"
		666	if $verbosity >= 11;
186	0	667	}
		668
		669	if ($htype == 1) { # DESTROY
		670	if (my $hook = delete $TERM->{_hook}) {
		671	for my $htype (0..$#$hook) {
		672	$hook_count[$htype] -= scalar keys %{ $hook->[$htype] || {} }
		673	or set_should_invoke $htype, 0;
		674	}
		675	}
		676
		677	# clear package objects
		678	%$_ = () for values %{ $TERM->{_pkg} };
		679
		680	# clear package
		681	%$TERM = ();
		682	}
		683
		684	$retval
187	}	685	}
		686
		687	sub exec_async(@) {
		688	my $pid = fork;
		689
		690	return
		691	if !defined $pid or $pid;
		692
		693	%ENV = %{ $TERM->env };
		694
		695	exec @_;
		696	_exit 255;
		697	}
		698
		699	# urxvt::term::extension
		700
		701	package urxvt::term::extension;
		702
		703	sub enable {
		704	my ($self, %hook) = @_;
		705	my $pkg = $self->{_pkg};
		706
		707	while (my ($name, $cb) = each %hook) {
		708	my $htype = $HOOKTYPE{uc $name};
		709	defined $htype
		710	or Carp::croak "unsupported hook type '$name'";
		711
		712	unless (exists $self->{term}{_hook}[$htype]{$pkg}) {
		713	$hook_count[$htype]++
		714	or urxvt::set_should_invoke $htype, 1;
		715	}
		716
		717	$self->{term}{_hook}[$htype]{$pkg} = $cb;
		718	}
		719	}
		720
		721	sub disable {
		722	my ($self, @hook) = @_;
		723	my $pkg = $self->{_pkg};
		724
		725	for my $name (@hook) {
		726	my $htype = $HOOKTYPE{uc $name};
		727	defined $htype
		728	or Carp::croak "unsupported hook type '$name'";
		729
		730	if (delete $self->{term}{_hook}[$htype]{$pkg}) {
		731	--$hook_count[$htype]
		732	or urxvt::set_should_invoke $htype, 0;
		733	}
		734	}
		735	}
		736
		737	our $AUTOLOAD;
		738
		739	sub AUTOLOAD {
		740	$AUTOLOAD =~ /:([^:]+)$/
		741	or die "FATAL: \$AUTOLOAD '$AUTOLOAD' unparsable";
		742
		743	eval qq{
		744	sub $AUTOLOAD {
		745	my \$proxy = shift;
		746	\$proxy->{term}->$1 (\@_)
		747	}
		748	1
		749	} or die "FATAL: unable to compile method forwarder: $@";
		750
		751	goto &$AUTOLOAD;
		752	}
		753
		754	sub DESTROY {
		755	# nop
		756	}
		757
		758	# urxvt::destroy_hook
		759
		760	sub urxvt::destroy_hook::DESTROY {
		761	${$_[0]}->();
		762	}
		763
		764	sub urxvt::destroy_hook(&) {
		765	bless \shift, urxvt::destroy_hook::
		766	}
		767
		768	package urxvt::anyevent;
		769
		770	=head2 The C<urxvt::anyevent> Class
		771
		772	The sole purpose of this class is to deliver an interface to the
		773	C<AnyEvent> module - any module using it will work inside urxvt without
		774	further programming. The only exception is that you cannot wait on
		775	condition variables, but non-blocking condvar use is ok. What this means
		776	is that you cannot use blocking APIs, but the non-blocking variant should
		777	work.
		778
		779	=cut
		780
		781	our $VERSION = 1;
		782
		783	$INC{"urxvt/anyevent.pm"} = 1; # mark us as there
		784	push @AnyEvent::REGISTRY, [urxvt => urxvt::anyevent::];
		785
		786	sub timer {
		787	my ($class, %arg) = @_;
		788
		789	my $cb = $arg{cb};
		790
		791	urxvt::timer
		792	->new
		793	->start (urxvt::NOW + $arg{after})
		794	->cb (sub {
		795	$_[0]->stop; # need to cancel manually
		796	$cb->();
		797	})
		798	}
		799
		800	sub io {
		801	my ($class, %arg) = @_;
		802
		803	my $cb = $arg{cb};
		804
		805	bless [$arg{fh}, urxvt::iow
		806	->new
		807	->fd (fileno $arg{fh})
		808	->events (($arg{poll} =~ /r/ ? 1 : 0)
		809	| ($arg{poll} =~ /w/ ? 2 : 0))
		810	->start
		811	->cb (sub {
		812	$cb->(($_[1] & 1 ? 'r' : '')
		813	. ($_[1] & 2 ? 'w' : ''));
		814	})],
		815	urxvt::anyevent::
		816	}
		817
		818	sub DESTROY {
		819	$_[0][1]->stop;
		820	}
		821
		822	sub condvar {
		823	bless \my $flag, urxvt::anyevent::condvar::
		824	}
		825
		826	sub urxvt::anyevent::condvar::broadcast {
		827	${$_[0]}++;
		828	}
		829
		830	sub urxvt::anyevent::condvar::wait {
		831	unless (${$_[0]}) {
		832	Carp::croak "AnyEvent->condvar blocking wait unsupported in urxvt, use a non-blocking API";
		833	}
		834	}
		835
		836	package urxvt::term;
		837
		838	=head2 The C<urxvt::term> Class
		839
		840	=over 4
		841
		842	=cut
188		843
189	# find on_xxx subs in the package and register them	844	# find on_xxx subs in the package and register them
190	# as hooks	845	# as hooks
191	sub register_package($) {	846	sub register_package {
192	my ($pkg) = @_;	847	my ($self, $pkg, $argv) = @_;
193		848
		849	my $proxy = bless {
		850	_pkg => $pkg,
		851	argv => $argv,
		852	}, $pkg;
		853	Scalar::Util::weaken ($proxy->{term} = $self);
		854
		855	$self->{_pkg}{$pkg} = $proxy;
		856
194	for my $hook (0.. $#HOOKNAME) {	857	for my $name (@HOOKNAME) {
195	my $name = $HOOKNAME[$hook];
196
197	my $ref = $pkg->can ("on_" . lc $name)	858	if (my $ref = $pkg->can ("on_" . lc $name)) {
198	or next;	859	$proxy->enable ($name => $ref);
199		860	}
200	$invoke_cb[$hook]{$ref*1} = $ref;
201	set_should_invoke $hook, 1;
202	}	861	}
203	}	862	}
204		863
205	my $script_pkg = "script0000";	864	=item $term = new urxvt::term $envhashref, $rxvtname, [arg...]
206	my %script_pkg;
207		865
208	# load a single script into its own package, once only	866	Creates a new terminal, very similar as if you had started it with system
209	sub load_script($) {	867	C<$rxvtname, arg...>. C<$envhashref> must be a reference to a C<%ENV>-like
210	my ($path) = @_;	868	hash which defines the environment of the new terminal.
211		869
212	$script_pkg{$path} ||= do {	870	Croaks (and probably outputs an error message) if the new instance
213	my $pkg = $script_pkg++;	871	couldn't be created. Returns C<undef> if the new instance didn't
214	verbose 3, "loading script '$path' into package '$pkg'";	872	initialise perl, and the terminal object otherwise. The C<init> and
		873	C<start> hooks will be called during this call.
215		874
216	open my $fh, "<:raw", $path	875	=cut
217	or die "$path: $!";
218		876
219	eval "package $pkg; use strict; use utf8;\n"	877	sub new {
220	. "#line 1 \"$path\"\n"	878	my ($class, $env, @args) = @_;
221	. do { local $/; <$fh> }
222	or die "$path: $@";
223		879
224	register_package $pkg;	880	_new ([ map "$_=$env->{$_}", keys %$env ], @args);
225
226	$pkg
227	};
228	}	881	}
229		882
230	load_script $_ for grep -f $_, <$LIBDIR/perl-ext/*>;	883	=item $term->destroy
231		884
232	=back	885	Destroy the terminal object (close the window, free resources
		886	etc.). Please note that @@RXVT_NAME@@ will not exit as long as any event
		887	watchers (timers, io watchers) are still active.
233		888
234	=head2 The C<urxvt::term> Class	889	=item $isset = $term->option ($optval[, $set])
235		890
236	=over 4	891	Returns true if the option specified by C<$optval> is enabled, and
		892	optionally change it. All option values are stored by name in the hash
		893	C<%urxvt::OPTION>. Options not enabled in this binary are not in the hash.
		894
		895	Here is a a likely non-exhaustive list of option names, please see the
		896	source file F</src/optinc.h> to see the actual list:
		897
		898	borderLess console cursorBlink cursorUnderline hold iconic insecure
		899	intensityStyles jumpScroll loginShell mapAlert meta8 mouseWheelScrollPage
		900	pastableTabs pointerBlank reverseVideo scrollBar scrollBar_floating
		901	scrollBar_right scrollTtyKeypress scrollTtyOutput scrollWithBuffer
		902	secondaryScreen secondaryScroll skipBuiltinGlyphs transparent
		903	tripleclickwords utmpInhibit visualBell
237		904
238	=item $value = $term->resource ($name[, $newval])	905	=item $value = $term->resource ($name[, $newval])
239		906
240	Returns the current resource value associated with a given name and	907	Returns the current resource value associated with a given name and
241	optionally sets a new value. Setting values is most useful in the C<init>	908	optionally sets a new value. Setting values is most useful in the C<init>
…		…
251		918
252	Please note that resource strings will currently only be freed when the	919	Please note that resource strings will currently only be freed when the
253	terminal is destroyed, so changing options frequently will eat memory.	920	terminal is destroyed, so changing options frequently will eat memory.
254		921
255	Here is a a likely non-exhaustive list of resource names, not all of which	922	Here is a a likely non-exhaustive list of resource names, not all of which
256	are supported in every build, please see the source to see the actual	923	are supported in every build, please see the source file F</src/rsinc.h>
257	list:	924	to see the actual list:
258		925
259	answerbackstring backgroundPixmap backspace_key boldFont boldItalicFont	926	answerbackstring backgroundPixmap backspace_key boldFont boldItalicFont
260	borderLess color cursorBlink cursorUnderline cutchars delete_key	927	borderLess color cursorBlink cursorUnderline cutchars delete_key
261	display_name embed ext_bwidth fade font geometry hold iconName	928	display_name embed ext_bwidth fade font geometry hold iconName
262	imFont imLocale inputMethod insecure int_bwidth intensityStyles	929	imFont imLocale inputMethod insecure int_bwidth intensityStyles
263	italicFont jumpScroll lineSpace loginShell mapAlert menu meta8	930	italicFont jumpScroll lineSpace loginShell mapAlert menu meta8 modifier
264	modifier mouseWheelScrollPage name pastableTabs path pointerBlank	931	mouseWheelScrollPage name pastableTabs path perl_eval perl_ext_1 perl_ext_2
265	pointerBlankDelay preeditType print_pipe pty_fd reverseVideo saveLines	932	perl_lib pointerBlank pointerBlankDelay preeditType print_pipe pty_fd
266	scrollBar scrollBar_align scrollBar_floating scrollBar_right	933	reverseVideo saveLines scrollBar scrollBar_align scrollBar_floating
267	scrollBar_thickness scrollTtyKeypress scrollTtyOutput scrollWithBuffer	934	scrollBar_right scrollBar_thickness scrollTtyKeypress scrollTtyOutput
268	scrollstyle secondaryScreen secondaryScroll selectstyle shade term_name	935	scrollWithBuffer scrollstyle secondaryScreen secondaryScroll selectstyle
269	title transparent transparent_all tripleclickwords utmpInhibit	936	shade term_name title transparent transparent_all tripleclickwords
270	visualBell	937	utmpInhibit visualBell
271		938
272	=cut	939	=cut
273		940
274	sub urxvt::term::resource($$;$) {	941	sub resource($$;$) {
275	my ($self, $name) = (shift, shift);	942	my ($self, $name) = (shift, shift);
276	unshift @_, $self, $name, ($name =~ s/\s*\+\s*(\d+)$// ? $1 : 0);	943	unshift @_, $self, $name, ($name =~ s/\s*\+\s*(\d+)$// ? $1 : 0);
277	goto &urxvt::term::_resource;	944	&urxvt::term::_resource
278	}	945	}
		946
		947	=item $value = $term->x_resource ($pattern)
		948
		949	Returns the X-Resource for the given pattern, excluding the program or
		950	class name, i.e. C<< $term->x_resource ("boldFont") >> should return the
		951	same value as used by this instance of rxvt-unicode. Returns C<undef> if no
		952	resource with that pattern exists.
		953
		954	This method should only be called during the C<on_start> hook, as there is
		955	only one resource database per display, and later invocations might return
		956	the wrong resources.
		957
		958	=item $success = $term->parse_keysym ($keysym_spec, $command_string)
		959
		960	Adds a keymap translation exactly as specified via a resource. See the
		961	C<keysym> resource in the @@RXVT_NAME@@(1) manpage.
		962
		963	=item $rend = $term->rstyle ([$new_rstyle])
		964
		965	Return and optionally change the current rendition. Text that is output by
		966	the terminal application will use this style.
		967
		968	=item ($row, $col) = $term->screen_cur ([$row, $col])
		969
		970	Return the current coordinates of the text cursor position and optionally
		971	set it (which is usually bad as applications don't expect that).
279		972
280	=item ($row, $col) = $term->selection_mark ([$row, $col])	973	=item ($row, $col) = $term->selection_mark ([$row, $col])
281		974
282	=item ($row, $col) = $term->selection_beg ([$row, $col])	975	=item ($row, $col) = $term->selection_beg ([$row, $col])
283		976
284	=item ($row, $col) = $term->selection_end ([$row, $col])	977	=item ($row, $col) = $term->selection_end ([$row, $col])
285		978
286	Return the current values of the selection mark, begin or end positions,	979	Return the current values of the selection mark, begin or end positions,
287	and optionally set them to new values.	980	and optionally set them to new values.
288		981
		982	=item $term->selection_make ($eventtime[, $rectangular])
		983
		984	Tries to make a selection as set by C<selection_beg> and
		985	C<selection_end>. If C<$rectangular> is true (default: false), a
		986	rectangular selection will be made. This is the prefered function to make
		987	a selection.
		988
289	=item $success = $term->selection_grab ($eventtime)	989	=item $success = $term->selection_grab ($eventtime)
290		990
291	Try to request the primary selection from the server (for example, as set	991	Try to request the primary selection text from the server (for example, as
292	by the next method).	992	set by the next method). No visual feedback will be given. This function
		993	is mostly useful from within C<on_sel_grab> hooks.
293		994
294	=item $oldtext = $term->selection ([$newtext])	995	=item $oldtext = $term->selection ([$newtext])
295		996
296	Return the current selection text and optionally replace it by C<$newtext>.	997	Return the current selection text and optionally replace it by C<$newtext>.
297		998
298	=item $term->scr_overlay ($x, $y, $text)	999	=item $term->overlay_simple ($x, $y, $text)
299		1000
300	Create a simple multi-line overlay box. See the next method for details.	1001	Create a simple multi-line overlay box. See the next method for details.
301		1002
302	=cut	1003	=cut
303		1004
304	sub urxvt::term::scr_overlay {	1005	sub overlay_simple {
305	my ($self, $x, $y, $text) = @_;	1006	my ($self, $x, $y, $text) = @_;
306		1007
307	my @lines = split /\n/, $text;	1008	my @lines = split /\n/, $text;
308		1009
309	my $w = 0;	1010	my $w = List::Util::max map $self->strwidth ($_), @lines;
310	for (map urxvt::wcswidth $_, @lines) {	1011
311	$w = $_ if $w < $_;	1012	my $overlay = $self->overlay ($x, $y, $w, scalar @lines);
		1013	$overlay->set (0, $_, $lines[$_]) for 0.. $#lines;
		1014
		1015	$overlay
		1016	}
		1017
		1018	=item $term->overlay ($x, $y, $width, $height[, $rstyle[, $border]])
		1019
		1020	Create a new (empty) overlay at the given position with the given
		1021	width/height. C<$rstyle> defines the initial rendition style
		1022	(default: C<OVERLAY_RSTYLE>).
		1023
		1024	If C<$border> is C<2> (default), then a decorative border will be put
		1025	around the box.
		1026
		1027	If either C<$x> or C<$y> is negative, then this is counted from the
		1028	right/bottom side, respectively.
		1029
		1030	This method returns an urxvt::overlay object. The overlay will be visible
		1031	as long as the perl object is referenced.
		1032
		1033	The methods currently supported on C<urxvt::overlay> objects are:
		1034
		1035	=over 4
		1036
		1037	=item $overlay->set ($x, $y, $text, $rend)
		1038
		1039	Similar to C<< $term->ROW_t >> and C<< $term->ROW_r >> in that it puts
		1040	text in rxvt-unicode's special encoding and an array of rendition values
		1041	at a specific position inside the overlay.
		1042
		1043	=item $overlay->hide
		1044
		1045	If visible, hide the overlay, but do not destroy it.
		1046
		1047	=item $overlay->show
		1048
		1049	If hidden, display the overlay again.
		1050
		1051	=back
		1052
		1053	=item $popup = $term->popup ($event)
		1054
		1055	Creates a new C<urxvt::popup> object that implements a popup menu. The
		1056	C<$event> I<must> be the event causing the menu to pop up (a button event,
		1057	currently).
		1058
		1059	=cut
		1060
		1061	sub popup {
		1062	my ($self, $event) = @_;
		1063
		1064	$self->grab ($event->{time}, 1)
		1065	or return;
		1066
		1067	my $popup = bless {
		1068	term => $self,
		1069	event => $event,
		1070	}, urxvt::popup::;
		1071
		1072	Scalar::Util::weaken $popup->{term};
		1073
		1074	$self->{_destroy}{$popup} = urxvt::destroy_hook { $popup->{popup}->destroy };
		1075	Scalar::Util::weaken $self->{_destroy}{$popup};
		1076
		1077	$popup
		1078	}
		1079
		1080	=item $cellwidth = $term->strwidth ($string)
		1081
		1082	Returns the number of screen-cells this string would need. Correctly
		1083	accounts for wide and combining characters.
		1084
		1085	=item $octets = $term->locale_encode ($string)
		1086
		1087	Convert the given text string into the corresponding locale encoding.
		1088
		1089	=item $string = $term->locale_decode ($octets)
		1090
		1091	Convert the given locale-encoded octets into a perl string.
		1092
		1093	=item $term->scr_xor_span ($beg_row, $beg_col, $end_row, $end_col[, $rstyle])
		1094
		1095	XORs the rendition values in the given span with the provided value
		1096	(default: C<RS_RVid>), which I<MUST NOT> contain font styles. Useful in
		1097	refresh hooks to provide effects similar to the selection.
		1098
		1099	=item $term->scr_xor_rect ($beg_row, $beg_col, $end_row, $end_col[, $rstyle1[, $rstyle2]])
		1100
		1101	Similar to C<scr_xor_span>, but xors a rectangle instead. Trailing
		1102	whitespace will additionally be xored with the C<$rstyle2>, which defaults
		1103	to C<RS_RVid | RS_Uline>, which removes reverse video again and underlines
		1104	it instead. Both styles I<MUST NOT> contain font styles.
		1105
		1106	=item $term->scr_bell
		1107
		1108	Ring the bell!
		1109
		1110	=item $term->scr_add_lines ($string)
		1111
		1112	Write the given text string to the screen, as if output by the application
		1113	running inside the terminal. It may not contain command sequences (escape
		1114	codes), but is free to use line feeds, carriage returns and tabs. The
		1115	string is a normal text string, not in locale-dependent encoding.
		1116
		1117	Normally its not a good idea to use this function, as programs might be
		1118	confused by changes in cursor position or scrolling. Its useful inside a
		1119	C<on_add_lines> hook, though.
		1120
		1121	=item $term->cmd_parse ($octets)
		1122
		1123	Similar to C<scr_add_lines>, but the argument must be in the
		1124	locale-specific encoding of the terminal and can contain command sequences
		1125	(escape codes) that will be interpreted.
		1126
		1127	=item $term->tt_write ($octets)
		1128
		1129	Write the octets given in C<$data> to the tty (i.e. as program input). To
		1130	pass characters instead of octets, you should convert your strings first
		1131	to the locale-specific encoding using C<< $term->locale_encode >>.
		1132
		1133	=item $old_events = $term->pty_ev_events ([$new_events])
		1134
		1135	Replaces the event mask of the pty watcher by the given event mask. Can
		1136	be used to suppress input and output handling to the pty/tty. See the
		1137	description of C<< urxvt::timer->events >>. Make sure to always restore
		1138	the previous value.
		1139
		1140	=item $windowid = $term->parent
		1141
		1142	Return the window id of the toplevel window.
		1143
		1144	=item $windowid = $term->vt
		1145
		1146	Return the window id of the terminal window.
		1147
		1148	=item $window_width = $term->width
		1149
		1150	=item $window_height = $term->height
		1151
		1152	=item $font_width = $term->fwidth
		1153
		1154	=item $font_height = $term->fheight
		1155
		1156	=item $font_ascent = $term->fbase
		1157
		1158	=item $terminal_rows = $term->nrow
		1159
		1160	=item $terminal_columns = $term->ncol
		1161
		1162	=item $has_focus = $term->focus
		1163
		1164	=item $is_mapped = $term->mapped
		1165
		1166	=item $max_scrollback = $term->saveLines
		1167
		1168	=item $nrow_plus_saveLines = $term->total_rows
		1169
		1170	=item $lines_in_scrollback = $term->nsaved
		1171
		1172	Return various integers describing terminal characteristics.
		1173
		1174	=item $x_display = $term->display_id
		1175
		1176	Return the DISPLAY used by rxvt-unicode.
		1177
		1178	=item $lc_ctype = $term->locale
		1179
		1180	Returns the LC_CTYPE category string used by this rxvt-unicode.
		1181
		1182	=item $env = $term->env
		1183
		1184	Returns a copy of the environment in effect for the terminal as a hashref
		1185	similar to C<\%ENV>.
		1186
		1187	=cut
		1188
		1189	sub env {
		1190	if (my $env = $_[0]->_env) {
		1191	+{ map /^([^=]+)(?:=(.*))?$/s && ($1 => $2), @$env }
		1192	} else {
		1193	+{ %ENV }
312	}	1194	}
313
314	$self->scr_overlay_new ($x, $y, $w, scalar @lines);
315	$self->scr_overlay_set (0, $_, $lines[$_]) for 0.. $#lines;
316	}	1195	}
317		1196
318	=item $term->scr_overlay_new ($x, $y, $width, $height)	1197	=item $modifiermask = $term->ModLevel3Mask
319		1198
320	Create a new (empty) overlay at the given position with the given	1199	=item $modifiermask = $term->ModMetaMask
321	width/height. A border will be put around the box. If either C<$x> or
322	C<$y> is negative, then this is counted from the right/bottom side,
323	respectively.
324		1200
325	=item $term->scr_overlay_off	1201	=item $modifiermask = $term->ModNumLockMask
326		1202
327	Switch the overlay off again.	1203	Return the modifier masks corresponding to the "ISO Level 3 Shift" (often
		1204	AltGr), the meta key (often Alt) and the num lock key, if applicable.
328		1205
329	=item $term->scr_overlay_set_char ($x, $y, $char, $rend = OVERLAY_RSTYLE)	1206	=item $view_start = $term->view_start ([$newvalue])
330		1207
331	Put a single character (specified numerically) at the given overlay	1208	Returns the negative row number of the topmost line. Minimum value is
332	position.	1209	C<0>, which displays the normal terminal contents. Larger values scroll
		1210	this many lines into the scrollback buffer.
333		1211
334	=item $term->scr_overlay_set ($x, $y, $text)	1212	=item $term->want_refresh
335		1213
336	Write a string at the given position into the overlay.	1214	Requests a screen refresh. At the next opportunity, rxvt-unicode will
		1215	compare the on-screen display with its stored representation. If they
		1216	differ, it redraws the differences.
		1217
		1218	Used after changing terminal contents to display them.
		1219
		1220	=item $text = $term->ROW_t ($row_number[, $new_text[, $start_col]])
		1221
		1222	Returns the text of the entire row with number C<$row_number>. Row C<0>
		1223	is the topmost terminal line, row C<< $term->$ncol-1 >> is the bottommost
		1224	terminal line. The scrollback buffer starts at line C<-1> and extends to
		1225	line C<< -$term->nsaved >>. Nothing will be returned if a nonexistent line
		1226	is requested.
		1227
		1228	If C<$new_text> is specified, it will replace characters in the current
		1229	line, starting at column C<$start_col> (default C<0>), which is useful
		1230	to replace only parts of a line. The font index in the rendition will
		1231	automatically be updated.
		1232
		1233	C<$text> is in a special encoding: tabs and wide characters that use more
		1234	than one cell when displayed are padded with urxvt::NOCHAR characters
		1235	(C<chr 65535>). Characters with combining characters and other characters
		1236	that do not fit into the normal tetx encoding will be replaced with
		1237	characters in the private use area.
		1238
		1239	You have to obey this encoding when changing text. The advantage is
		1240	that C<substr> and similar functions work on screen cells and not on
		1241	characters.
		1242
		1243	The methods C<< $term->special_encode >> and C<< $term->special_decode >>
		1244	can be used to convert normal strings into this encoding and vice versa.
		1245
		1246	=item $rend = $term->ROW_r ($row_number[, $new_rend[, $start_col]])
		1247
		1248	Like C<< $term->ROW_t >>, but returns an arrayref with rendition
		1249	bitsets. Rendition bitsets contain information about colour, font, font
		1250	styles and similar information. See also C<< $term->ROW_t >>.
		1251
		1252	When setting rendition, the font mask will be ignored.
		1253
		1254	See the section on RENDITION, above.
		1255
		1256	=item $length = $term->ROW_l ($row_number[, $new_length])
		1257
		1258	Returns the number of screen cells that are in use ("the line
		1259	length"). Unlike the urxvt core, this returns C<< $term->ncol >> if the
		1260	line is joined with the following one.
		1261
		1262	=item $bool = $term->is_longer ($row_number)
		1263
		1264	Returns true if the row is part of a multiple-row logical "line" (i.e.
		1265	joined with the following row), which means all characters are in use
		1266	and it is continued on the next row (and possibly a continuation of the
		1267	previous row(s)).
		1268
		1269	=item $line = $term->line ($row_number)
		1270
		1271	Create and return a new C<urxvt::line> object that stores information
		1272	about the logical line that row C<$row_number> is part of. It supports the
		1273	following methods:
		1274
		1275	=over 4
		1276
		1277	=item $text = $line->t ([$new_text])
		1278
		1279	Returns or replaces the full text of the line, similar to C<ROW_t>
		1280
		1281	=item $rend = $line->r ([$new_rend])
		1282
		1283	Returns or replaces the full rendition array of the line, similar to C<ROW_r>
		1284
		1285	=item $length = $line->l
		1286
		1287	Returns the length of the line in cells, similar to C<ROW_l>.
		1288
		1289	=item $rownum = $line->beg
		1290
		1291	=item $rownum = $line->end
		1292
		1293	Return the row number of the first/last row of the line, respectively.
		1294
		1295	=item $offset = $line->offset_of ($row, $col)
		1296
		1297	Returns the character offset of the given row|col pair within the logical
		1298	line. Works for rows outside the line, too, and returns corresponding
		1299	offsets outside the string.
		1300
		1301	=item ($row, $col) = $line->coord_of ($offset)
		1302
		1303	Translates a string offset into terminal coordinates again.
		1304
		1305	=back
		1306
		1307	=cut
		1308
		1309	sub line {
		1310	my ($self, $row) = @_;
		1311
		1312	my $maxrow = $self->nrow - 1;
		1313
		1314	my ($beg, $end) = ($row, $row);
		1315
		1316	--$beg while $self->ROW_is_longer ($beg - 1);
		1317	++$end while $self->ROW_is_longer ($end) && $end < $maxrow;
		1318
		1319	bless {
		1320	term => $self,
		1321	beg => $beg,
		1322	end => $end,
		1323	ncol => $self->ncol,
		1324	len => ($end - $beg) * $self->ncol + $self->ROW_l ($end),
		1325	}, urxvt::line::
		1326	}
		1327
		1328	sub urxvt::line::t {
		1329	my ($self) = @_;
		1330
		1331	if (@_ > 1)
		1332	{
		1333	$self->{term}->ROW_t ($_, $_[1], 0, ($_ - $self->{beg}) * $self->{ncol}, $self->{ncol})
		1334	for $self->{beg} .. $self->{end};
		1335	}
		1336
		1337	defined wantarray &&
		1338	substr +(join "", map $self->{term}->ROW_t ($_), $self->{beg} .. $self->{end}),
		1339	0, $self->{len}
		1340	}
		1341
		1342	sub urxvt::line::r {
		1343	my ($self) = @_;
		1344
		1345	if (@_ > 1)
		1346	{
		1347	$self->{term}->ROW_r ($_, $_[1], 0, ($_ - $self->{beg}) * $self->{ncol}, $self->{ncol})
		1348	for $self->{beg} .. $self->{end};
		1349	}
		1350
		1351	if (defined wantarray) {
		1352	my $rend = [
		1353	map @{ $self->{term}->ROW_r ($_) }, $self->{beg} .. $self->{end}
		1354	];
		1355	$#$rend = $self->{len} - 1;
		1356	return $rend;
		1357	}
		1358
		1359	()
		1360	}
		1361
		1362	sub urxvt::line::beg { $_[0]{beg} }
		1363	sub urxvt::line::end { $_[0]{end} }
		1364	sub urxvt::line::l { $_[0]{len} }
		1365
		1366	sub urxvt::line::offset_of {
		1367	my ($self, $row, $col) = @_;
		1368
		1369	($row - $self->{beg}) * $self->{ncol} + $col
		1370	}
		1371
		1372	sub urxvt::line::coord_of {
		1373	my ($self, $offset) = @_;
		1374
		1375	use integer;
		1376
		1377	(
		1378	$offset / $self->{ncol} + $self->{beg},
		1379	$offset % $self->{ncol}
		1380	)
		1381	}
		1382
		1383	=item $text = $term->special_encode $string
		1384
		1385	Converts a perl string into the special encoding used by rxvt-unicode,
		1386	where one character corresponds to one screen cell. See
		1387	C<< $term->ROW_t >> for details.
		1388
		1389	=item $string = $term->special_decode $text
		1390
		1391	Converts rxvt-unicodes text reprsentation into a perl string. See
		1392	C<< $term->ROW_t >> for details.
		1393
		1394	=item $success = $term->grab_button ($button, $modifiermask)
		1395
		1396	Registers a synchronous button grab. See the XGrabButton manpage.
		1397
		1398	=item $success = $term->grab ($eventtime[, $sync])
		1399
		1400	Calls XGrabPointer and XGrabKeyboard in asynchronous (default) or
		1401	synchronous (C<$sync> is true). Also remembers the grab timestampe.
		1402
		1403	=item $term->allow_events_async
		1404
		1405	Calls XAllowEvents with AsyncBoth for the most recent grab.
		1406
		1407	=item $term->allow_events_sync
		1408
		1409	Calls XAllowEvents with SyncBoth for the most recent grab.
		1410
		1411	=item $term->allow_events_replay
		1412
		1413	Calls XAllowEvents with both ReplayPointer and ReplayKeyboard for the most
		1414	recent grab.
		1415
		1416	=item $term->ungrab
		1417
		1418	Calls XUngrab for the most recent grab. Is called automatically on
		1419	evaluation errors, as it is better to lose the grab in the error case as
		1420	the session.
		1421
		1422	=back
		1423
		1424	=cut
		1425
		1426	package urxvt::popup;
		1427
		1428	=head2 The C<urxvt::popup> Class
		1429
		1430	=over 4
		1431
		1432	=cut
		1433
		1434	sub add_item {
		1435	my ($self, $item) = @_;
		1436
		1437	$item->{rend}{normal} = "\x1b[0;30;47m" unless exists $item->{rend}{normal};
		1438	$item->{rend}{hover} = "\x1b[0;30;46m" unless exists $item->{rend}{hover};
		1439	$item->{rend}{active} = "\x1b[m" unless exists $item->{rend}{active};
		1440
		1441	$item->{render} ||= sub { $_[0]{text} };
		1442
		1443	push @{ $self->{item} }, $item;
		1444	}
		1445
		1446	=item $popup->add_title ($title)
		1447
		1448	Adds a non-clickable title to the popup.
		1449
		1450	=cut
		1451
		1452	sub add_title {
		1453	my ($self, $title) = @_;
		1454
		1455	$self->add_item ({
		1456	rend => { normal => "\x1b[38;5;11;44m", hover => "\x1b[38;5;11;44m", active => "\x1b[38;5;11;44m" },
		1457	text => $title,
		1458	activate => sub { },
		1459	});
		1460	}
		1461
		1462	=item $popup->add_separator ([$sepchr])
		1463
		1464	Creates a separator, optionally using the character given as C<$sepchr>.
		1465
		1466	=cut
		1467
		1468	sub add_separator {
		1469	my ($self, $sep) = @_;
		1470
		1471	$sep ||= "=";
		1472
		1473	$self->add_item ({
		1474	rend => { normal => "\x1b[0;30;47m", hover => "\x1b[0;30;47m", active => "\x1b[0;30;47m" },
		1475	text => "",
		1476	render => sub { $sep x $self->{term}->ncol },
		1477	activate => sub { },
		1478	});
		1479	}
		1480
		1481	=item $popup->add_button ($text, $cb)
		1482
		1483	Adds a clickable button to the popup. C<$cb> is called whenever it is
		1484	selected.
		1485
		1486	=cut
		1487
		1488	sub add_button {
		1489	my ($self, $text, $cb) = @_;
		1490
		1491	$self->add_item ({ type => "button", text => $text, activate => $cb});
		1492	}
		1493
		1494	=item $popup->add_toggle ($text, $cb, $initial_value)
		1495
		1496	Adds a toggle/checkbox item to the popup. Teh callback gets called
		1497	whenever it gets toggled, with a boolean indicating its value as its first
		1498	argument.
		1499
		1500	=cut
		1501
		1502	sub add_toggle {
		1503	my ($self, $text, $cb, $value) = @_;
		1504
		1505	my $item; $item = {
		1506	type => "button",
		1507	text => " $text",
		1508	value => $value,
		1509	render => sub { ($_[0]{value} ? "* " : " ") . $text },
		1510	activate => sub { $cb->($_[1]{value} = !$_[1]{value}); },
		1511	};
		1512
		1513	$self->add_item ($item);
		1514	}
		1515
		1516	=item $popup->show
		1517
		1518	Displays the popup (which is initially hidden).
		1519
		1520	=cut
		1521
		1522	sub show {
		1523	my ($self) = @_;
		1524
		1525	local $urxvt::popup::self = $self;
		1526
		1527	my $env = $self->{term}->env;
		1528	# we can't hope to reproduce the locale algorithm, so nuke LC_ALL and set LC_CTYPE.
		1529	delete $env->{LC_ALL};
		1530	$env->{LC_CTYPE} = $self->{term}->locale;
		1531
		1532	urxvt::term->new ($env, $self->{term}->resource ("name"),
		1533	"--perl-lib" => "", "--perl-ext-common" => "", "-pty-fd" => -1, "-sl" => 0, "-b" => 0,
		1534	"--transient-for" => $self->{term}->parent,
		1535	"-display" => $self->{term}->display_id,
		1536	"-pe" => "urxvt-popup")
		1537	or die "unable to create popup window\n";
		1538	}
		1539
		1540	sub DESTROY {
		1541	my ($self) = @_;
		1542
		1543	delete $self->{term}{_destroy}{$self};
		1544	$self->{term}->ungrab;
		1545	}
337		1546
338	=back	1547	=back
339		1548
340	=head2 The C<urxvt::timer> Class	1549	=head2 The C<urxvt::timer> Class
341		1550
342	This class implements timer watchers/events. Time is represented as a	1551	This class implements timer watchers/events. Time is represented as a
343	fractional number of seconds since the epoch. Example:	1552	fractional number of seconds since the epoch. Example:
344		1553
345	# create a digital clock display in upper right corner	1554	$term->{overlay} = $term->overlay (-1, 0, 8, 1, urxvt::OVERLAY_RSTYLE, 0);
346	$term->{timer} = urxvt::timer	1555	$term->{timer} = urxvt::timer
347	->new	1556	->new
348	->start (urxvt::NOW)	1557	->interval (1)
349	->cb (sub {	1558	->cb (sub {
350	my ($timer) = @_;
351	my $time = $timer->at;
352	$timer->start ($time + 1);
353	$self->scr_overlay (-1, 0,	1559	$term->{overlay}->set (0, 0,
354	POSIX::strftime "%H:%M:%S", localtime $time);	1560	sprintf "%2d:%02d:%02d", (localtime urxvt::NOW)[2,1,0]);
355	});	1561	});
356		1562
357	=over 4	1563	=over 4
358		1564
359	=item $timer = new urxvt::timer	1565	=item $timer = new urxvt::timer
360		1566
361	Create a new timer object in stopped state.	1567	Create a new timer object in started state. It is scheduled to fire
		1568	immediately.
362		1569
363	=item $timer = $timer->cb (sub { my ($timer) = @_; ... })	1570	=item $timer = $timer->cb (sub { my ($timer) = @_; ... })
364		1571
365	Set the callback to be called when the timer triggers.	1572	Set the callback to be called when the timer triggers.
366		1573
…		…
369	Return the time this watcher will fire next.	1576	Return the time this watcher will fire next.
370		1577
371	=item $timer = $timer->set ($tstamp)	1578	=item $timer = $timer->set ($tstamp)
372		1579
373	Set the time the event is generated to $tstamp.	1580	Set the time the event is generated to $tstamp.
		1581
		1582	=item $timer = $timer->interval ($interval)
		1583
		1584	Normally (and when C<$interval> is C<0>), the timer will automatically
		1585	stop after it has fired once. If C<$interval> is non-zero, then the timer
		1586	is automatically rescheduled at the given intervals.
374		1587
375	=item $timer = $timer->start	1588	=item $timer = $timer->start
376		1589
377	Start the timer.	1590	Start the timer.
378		1591
…		…
392		1605
393	$term->{socket} = ...	1606	$term->{socket} = ...
394	$term->{iow} = urxvt::iow	1607	$term->{iow} = urxvt::iow
395	->new	1608	->new
396	->fd (fileno $term->{socket})	1609	->fd (fileno $term->{socket})
397	->events (1) # wait for read data	1610	->events (urxvt::EVENT_READ)
398	->start	1611	->start
399	->cb (sub {	1612	->cb (sub {
400	my ($iow, $revents) = @_;	1613	my ($iow, $revents) = @_;
401	# $revents must be 1 here, no need to check	1614	# $revents must be 1 here, no need to check
402	sysread $term->{socket}, my $buf, 8192	1615	sysread $term->{socket}, my $buf, 8192
…		…
419		1632
420	Set the filedescriptor (not handle) to watch.	1633	Set the filedescriptor (not handle) to watch.
421		1634
422	=item $iow = $iow->events ($eventmask)	1635	=item $iow = $iow->events ($eventmask)
423		1636
424	Set the event mask to watch. Bit #0 (value C<1>) enables watching for read	1637	Set the event mask to watch. The only allowed values are
425	data, Bit #1 (value C<2>) enables watching for write data.	1638	C<urxvt::EVENT_READ> and C<urxvt::EVENT_WRITE>, which might be ORed
		1639	together, or C<urxvt::EVENT_NONE>.
426		1640
427	=item $iow = $iow->start	1641	=item $iow = $iow->start
428		1642
429	Start watching for requested events on the given handle.	1643	Start watching for requested events on the given handle.
430		1644
…		…
441	This variable controls the verbosity level of the perl extension. Higher	1655	This variable controls the verbosity level of the perl extension. Higher
442	numbers indicate more verbose output.	1656	numbers indicate more verbose output.
443		1657
444	=over 4	1658	=over 4
445		1659
446	=item 0 - only fatal messages	1660	=item == 0 - fatal messages
447		1661
448	=item 3 - script loading and management	1662	=item >= 3 - script loading and management
449		1663
450	=item 10 - all events received	1664	=item >=10 - all called hooks
		1665
		1666	=item >=11 - hook reutrn values
451		1667
452	=back	1668	=back
453		1669
454	=head1 AUTHOR	1670	=head1 AUTHOR
455		1671

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