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Revision 1.1 by root, Mon Jan 2 15:35:43 2006 UTC vs.
Revision 1.115 by root, Fri Jan 20 15:57:21 2006 UTC

		1	=encoding utf8
		2
1	=head1 NAME	3	=head1 NAME
2		4
3	urxvt - 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 $LIBDIR/perl-init/, 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 written in 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;
		13	()
17	}	14	}
18		15
19	1	16	# start a @@RXVT_NAME@@ using it:
		17
		18	@@RXVT_NAME@@ --perl-lib $HOME -pe grab_test
20		19
21	=head1 DESCRIPTION	20	=head1 DESCRIPTION
22		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	Or by adding them to the resource for extensions loaded by default:
		41
		42	URxvt.perl-ext-common: default,automove-background,selection-autotransform
		43
		44	=over 4
		45
		46	=item selection (enabled by default)
		47
		48	(More) intelligent selection. This extension tries to be more intelligent
		49	when the user extends selections (double-click and further clicks). Right
		50	now, it tries to select words, urls and complete shell-quoted
		51	arguments, which is very convenient, too, if your F<ls> supports
		52	C<--quoting-style=shell>.
		53
		54	A double-click usually selects the word under the cursor, further clicks
		55	will enlarge the selection.
		56
		57	The selection works by trying to match a number of regexes and displaying
		58	them in increasing order of length. You can add your own regexes by
		59	specifying resources of the form:
		60
		61	URxvt.selection.pattern-0: perl-regex
		62	URxvt.selection.pattern-1: perl-regex
		63	...
		64
		65	The index number (0, 1...) must not have any holes, and each regex must
		66	contain at least one pair of capturing parentheses, which will be used for
		67	the match. For example, the followign adds a regex that matches everything
		68	between two vertical bars:
		69
		70	URxvt.selection.pattern-0: \\|([^|]+)\\|
		71
		72	You can look at the source of the selection extension to see more
		73	interesting uses, such as parsing a line from beginning to end.
		74
		75	This extension also offers following bindable keyboard commands:
		76
		77	=over 4
		78
		79	=item rot13
		80
		81	Rot-13 the selection when activated. Used via keyboard trigger:
		82
		83	URxvt.keysym.C-M-r: perl:selection:rot13
		84
		85	=back
		86
		87	=item option-popup (enabled by default)
		88
		89	Binds a popup menu to Ctrl-Button2 that lets you toggle (some) options at
		90	runtime.
		91
		92	=item selection-popup (enabled by default)
		93
		94	Binds a popup menu to Ctrl-Button3 that lets you convert the selection
		95	text into various other formats/action (such as uri unescaping, perl
		96	evalution, web-browser starting etc.), depending on content.
		97
		98	Other extensions can extend this popup menu by pushing a code reference
		99	onto C<@{ $term->{selection_popup_hook} }>, that is called whenever the
		100	popup is displayed.
		101
		102	It's sole argument is the popup menu, which can be modified. The selection
		103	is in C<$_>, which can be used to decide wether to add something or not.
		104	It should either return nothing or a string and a code reference. The
		105	string will be used as button text and the code reference will be called
		106	when the button gets activated and should transform C<$_>.
		107
		108	The following will add an entry C<a to b> that transforms all C<a>s in
		109	the selection to C<b>s, but only if the selection currently contains any
		110	C<a>s:
		111
		112	push @{ $self->{term}{selection_popup_hook} }, sub {
		113	/a/ ? ("a to be" => sub { s/a/b/g }
		114	: ()
		115	};
		116
		117	=item searchable-scrollback<hotkey> (enabled by default)
		118
		119	Adds regex search functionality to the scrollback buffer, triggered
		120	by a hotkey (default: C<M-s>). While in search mode, normal terminal
		121	input/output is suspended and a regex is displayed at the bottom of the
		122	screen.
		123
		124	Inputting characters appends them to the regex and continues incremental
		125	search. C<BackSpace> removes a character from the regex, C<Up> and C<Down>
		126	search upwards/downwards in the scrollback buffer, C<End> jumps to the
		127	bottom. C<Escape> leaves search mode and returns to the point where search
		128	was started, while C<Enter> or C<Return> stay at the current position and
		129	additionally stores the first match in the current line into the primary
		130	selection.
		131
		132	=item selection-autotransform
		133
		134	This selection allows you to do automatic transforms on a selection
		135	whenever a selection is made.
		136
		137	It works by specifying perl snippets (most useful is a single C<s///>
		138	operator) that modify C<$_> as resources:
		139
		140	URxvt.selection-autotransform.0: transform
		141	URxvt.selection-autotransform.1: transform
		142	...
		143
		144	For example, the following will transform selections of the form
		145	C<filename:number>, often seen in compiler messages, into C<vi +$filename
		146	$word>:
		147
		148	URxvt.selection-autotransform.0: s/^([^:[:space:]]+):(\\d+):?$/vi +$2 \\Q$1\\E\\x0d/
		149
		150	And this example matches the same,but replaces it with vi-commands you can
		151	paste directly into your (vi :) editor:
		152
		153	URxvt.selection-autotransform.0: s/^([^:[:space:]]+(\\d+):?$/:e \\Q$1\\E\\x0d:$2\\x0d/
		154
		155	Of course, this can be modified to suit your needs and your editor :)
		156
		157	To expand the example above to typical perl error messages ("XXX at
		158	FILENAME line YYY."), you need a slightly more elaborate solution:
		159
		160	URxvt.selection.pattern-0: ( at .*? line \\d+[,.])
		161	URxvt.selection-autotransform.0: s/^ at (.*?) line (\\d+)[,.]$/:e \\Q$1\E\\x0d:$2\\x0d/
		162
		163	The first line tells the selection code to treat the unchanging part of
		164	every error message as a selection pattern, and the second line transforms
		165	the message into vi commands to load the file.
		166
		167	=item tabbed
		168
		169	This transforms the terminal into a tabbar with additional terminals, that
		170	is, it implements what is commonly refered to as "tabbed terminal". The topmost line
		171	displays a "[NEW]" button, which, when clicked, will add a new tab, followed by one
		172	button per tab.
		173
		174	Clicking a button will activate that tab. Pressing Shift-Left and
		175	Shift-Right will switch to the tab left or right of the current one.
		176
		177	=item mark-urls
		178
		179	Uses per-line display filtering (C<on_line_update>) to underline urls and
		180	make them clickable. When middle-clicked, the program specified in the
		181	resource C<urlLauncher> (default C<x-www-browser>) will be started with
		182	the URL as first argument.
		183
		184	=item automove-background
		185
		186	This is basically a one-line extension that dynamically changes the background pixmap offset
		187	to the window position, in effect creating the same effect as pseudo transparency with
		188	a custom pixmap. No scaling is supported in this mode. Exmaple:
		189
		190	@@RXVT_NAME@@ -pixmap background.xpm -pe automove-background
		191
		192	=item block-graphics-to-ascii
		193
		194	A not very useful example of filtering all text output to the terminal,
		195	by replacing all line-drawing characters (U+2500 .. U+259F) by a
		196	similar-looking ascii character.
		197
		198	=item digital-clock
		199
		200	Displays a digital clock using the built-in overlay.
		201
		202	=item example-refresh-hooks
		203
		204	Displays a very simple digital clock in the upper right corner of the
		205	window. Illustrates overwriting the refresh callbacks to create your own
		206	overlays or changes.
		207
		208	=item selection-pastebin
		209
		210	This is a little rarely useful extension that Uploads the selection as
		211	textfile to a remote site (or does other things). (The implementation is
		212	not currently secure for use in a multiuser environment as it writes to
		213	F</tmp> directly.).
		214
		215	It listens to the C<selection-pastebin:remote-pastebin> keyboard command,
		216	i.e.
		217
		218	URxvt.keysym.C-M-e: perl:selection-pastebin:remote-pastebin
		219
		220	Pressing this combination runs a command with C<%> replaced by the name of
		221	the textfile. This command can be set via a resource:
		222
		223	URxvt.selection-pastebin.cmd: rsync -apP % ruth:/var/www/www.ta-sa.org/files/txt/.
		224
		225	And the default is likely not useful to anybody but the few people around
		226	here :)
		227
		228	The name of the textfile is the hex encoded md5 sum of the selection, so
		229	the same content should lead to the same filename.
		230
		231	After a successful upload the selection will be replaced by the text given
		232	in the C<selection-pastebin-url> resource (again, the % is the placeholder
		233	for the filename):
		234
		235	URxvt.selection-pastebin.url: http://www.ta-sa.org/files/txt/%
		236
		237	=back
		238
		239	=head1 API DOCUMENTATION
		240
		241	=head2 General API Considerations
		242
		243	All objects (such as terminals, time watchers etc.) are typical
		244	reference-to-hash objects. The hash can be used to store anything you
		245	like. All members starting with an underscore (such as C<_ptr> or
		246	C<_hook>) are reserved for internal uses and B<MUST NOT> be accessed or
		247	modified).
		248
		249	When objects are destroyed on the C++ side, the perl object hashes are
		250	emptied, so its best to store related objects such as time watchers and
		251	the like inside the terminal object so they get destroyed as soon as the
		252	terminal is destroyed.
		253
		254	Argument names also often indicate the type of a parameter. Here are some
		255	hints on what they mean:
		256
		257	=over 4
		258
		259	=item $text
		260
		261	Rxvt-unicodes special way of encoding text, where one "unicode" character
		262	always represents one screen cell. See L<ROW_t> for a discussion of this format.
		263
		264	=item $string
		265
		266	A perl text string, with an emphasis on I<text>. It can store all unicode
		267	characters and is to be distinguished with text encoded in a specific
		268	encoding (often locale-specific) and binary data.
		269
		270	=item $octets
		271
		272	Either binary data or - more common - a text string encoded in a
		273	locale-specific way.
		274
		275	=back
		276
		277	=head2 Extension Objects
		278
		279	Very perl extension is a perl class. A separate perl object is created
		280	for each terminal and each extension and passed as the first parameter to
		281	hooks. So extensions can use their C<$self> object without having to think
		282	about other extensions, with the exception of methods and members that
		283	begin with an underscore character C<_>: these are reserved for internal
		284	use.
		285
		286	Although it isn't a C<urxvt::term> object, you can call all methods of the
		287	C<urxvt::term> class on this object.
		288
		289	It has the following methods and data members:
		290
		291	=over 4
		292
		293	=item $urxvt_term = $self->{term}
		294
		295	Returns the C<urxvt::term> object associated with this instance of the
		296	extension. This member I<must not> be changed in any way.
		297
		298	=item $self->enable ($hook_name => $cb, [$hook_name => $cb..])
		299
		300	Dynamically enable the given hooks (named without the C<on_> prefix) for
		301	this extension, replacing any previous hook. This is useful when you want
		302	to overwrite time-critical hooks only temporarily.
		303
		304	=item $self->disable ($hook_name[, $hook_name..])
		305
		306	Dynamically disable the given hooks.
		307
		308	=back
		309
23	=head2 Hooks	310	=head2 Hooks
24		311
25	The following subroutines can be declared in loaded scripts, and will be called	312	The following subroutines can be declared in extension files, and will be
26	whenever the relevant event happens.	313	called whenever the relevant event happens.
27		314
28	All of them must return a boolean value. If it is true, then the event	315	The first argument passed to them is an extension oject as described in
29	counts as being I<consumed>, and the invocation of other hooks is skipped,	316	the in the C<Extension Objects> section.
		317
		318	B<All> of these hooks must return a boolean value. If any of the called
		319	hooks returns true, then the event counts as being I<consumed>, and the
30	and the relevant action might not be carried out by the C++ code.	320	relevant action might not be carried out by the C++ code.
31		321
32	When in doubt, return a false value (preferably C<()>).	322	I<< When in doubt, return a false value (preferably C<()>). >>
33		323
34	=over 4	324	=over 4
35		325
36	=item on_init $term	326	=item on_init $term
37		327
38	Called after a new terminal object has been initialized, but before	328	Called after a new terminal object has been initialized, but before
39	windows are created or the command gets run.	329	windows are created or the command gets run. Most methods are unsafe to
		330	call or deliver senseless data, as terminal size and other characteristics
		331	have not yet been determined. You can safely query and change resources
		332	and options, though. For many purposes the C<on_start> hook is a better
		333	place.
		334
		335	=item on_start $term
		336
		337	Called at the very end of initialisation of a new terminal, just before
		338	trying to map (display) the toplevel and returning to the mainloop.
		339
		340	=item on_destroy $term
		341
		342	Called whenever something tries to destroy terminal, before doing anything
		343	yet. If this hook returns true, then destruction is skipped, but this is
		344	rarely a good idea.
40		345
41	=item on_reset $term	346	=item on_reset $term
42		347
43	Called after the screen is "reset" for any reason, such as resizing or	348	Called after the screen is "reset" for any reason, such as resizing or
44	control sequences. Here is where you can react on changes to size-related	349	control sequences. Here is where you can react on changes to size-related
45	variables.	350	variables.
46		351
47	=item on_start $term	352	=item on_child_start $term, $pid
48		353
49	Called at the very end of initialisation of a new terminal, just before	354	Called just after the child process has been C<fork>ed.
50	returning to the mainloop.	355
		356	=item on_child_exit $term, $status
		357
		358	Called just after the child process has exited. C<$status> is the status
		359	from C<waitpid>.
51		360
52	=item on_sel_make $term, $eventtime	361	=item on_sel_make $term, $eventtime
53		362
54	Called whenever a selection has been made by the user, but before the	363	Called whenever a selection has been made by the user, but before the
55	selection text is copied, so changes to the beginning, end or type of the	364	selection text is copied, so changes to the beginning, end or type of the
…		…
64	requested from the server. The selection text can be queried and changed	373	requested from the server. The selection text can be queried and changed
65	by calling C<< $term->selection >>.	374	by calling C<< $term->selection >>.
66		375
67	Returning a true value aborts selection grabbing. It will still be hilighted.	376	Returning a true value aborts selection grabbing. It will still be hilighted.
68		377
69	=item on_focus_in $term	378	=item on_sel_extend $term
70		379
71	Called whenever the window gets the keyboard focus, before urxvt does	380	Called whenever the user tries to extend the selection (e.g. with a double
72	focus in processing.	381	click) and is either supposed to return false (normal operation), or
		382	should extend the selection itelf and return true to suppress the built-in
		383	processing. This can happen multiple times, as long as the callback
		384	returns true, it will be called on every further click by the user and is
		385	supposed to enlarge the selection more and more, if possible.
73		386
74	=item on_focus_out $term	387	See the F<selection> example extension.
75
76	Called wheneever the window loses keyboard focus, before urxvt does focus
77	out processing.
78		388
79	=item on_view_change $term, $offset	389	=item on_view_change $term, $offset
80		390
81	Called whenever the view offset changes, i..e the user or program	391	Called whenever the view offset changes, i..e the user or program
82	scrolls. Offset C<0> means display the normal terminal, positive values	392	scrolls. Offset C<0> means display the normal terminal, positive values
…		…
90		400
91	It is called before lines are scrolled out (so rows 0 .. min ($lines - 1,	401	It is called before lines are scrolled out (so rows 0 .. min ($lines - 1,
92	$nrow - 1) represent the lines to be scrolled out). C<$saved> is the total	402	$nrow - 1) represent the lines to be scrolled out). C<$saved> is the total
93	number of lines that will be in the scrollback buffer.	403	number of lines that will be in the scrollback buffer.
94		404
95	=item on_tty_activity $term *NYI*	405	=item on_osc_seq $term, $string
96		406
97	Called whenever the program(s) running in the urxvt window send output.	407	Called whenever the B<ESC ] 777 ; string ST> command sequence (OSC =
		408	operating system command) is processed. Cursor position and other state
		409	information is up-to-date when this happens. For interoperability, the
		410	string should start with the extension name and a colon, to distinguish
		411	it from commands for other extensions, and this might be enforced in the
		412	future.
		413
		414	Be careful not ever to trust (in a security sense) the data you receive,
		415	as its source can not easily be controleld (e-mail content, messages from
		416	other users on the same system etc.).
		417
		418	=item on_add_lines $term, $string
		419
		420	Called whenever text is about to be output, with the text as argument. You
		421	can filter/change and output the text yourself by returning a true value
		422	and calling C<< $term->scr_add_lines >> yourself. Please note that this
		423	might be very slow, however, as your hook is called for B<all> text being
		424	output.
		425
		426	=item on_tt_write $term, $octets
		427
		428	Called whenever some data is written to the tty/pty and can be used to
		429	suppress or filter tty input.
		430
		431	=item on_line_update $term, $row
		432
		433	Called whenever a line was updated or changed. Can be used to filter
		434	screen output (e.g. underline urls or other useless stuff). Only lines
		435	that are being shown will be filtered, and, due to performance reasons,
		436	not always immediately.
		437
		438	The row number is always the topmost row of the line if the line spans
		439	multiple rows.
		440
		441	Please note that, if you change the line, then the hook might get called
		442	later with the already-modified line (e.g. if unrelated parts change), so
		443	you cannot just toggle rendition bits, but only set them.
98		444
99	=item on_refresh_begin $term	445	=item on_refresh_begin $term
100		446
101	Called just before the screen gets redrawn. Can be used for overlay	447	Called just before the screen gets redrawn. Can be used for overlay
102	or similar effects by modify terminal contents in refresh_begin, and	448	or similar effects by modify terminal contents in refresh_begin, and
…		…
105		451
106	=item on_refresh_end $term	452	=item on_refresh_end $term
107		453
108	Called just after the screen gets redrawn. See C<on_refresh_begin>.	454	Called just after the screen gets redrawn. See C<on_refresh_begin>.
109		455
		456	=item on_keyboard_command $term, $string
		457
		458	Called whenever the user presses a key combination that has a
		459	C<perl:string> action bound to it (see description of the B<keysym>
		460	resource in the @@RXVT_NAME@@(1) manpage).
		461
		462	=item on_x_event $term, $event
		463
		464	Called on every X event received on the vt window (and possibly other
		465	windows). Should only be used as a last resort. Most event structure
		466	members are not passed.
		467
		468	=item on_focus_in $term
		469
		470	Called whenever the window gets the keyboard focus, before rxvt-unicode
		471	does focus in processing.
		472
		473	=item on_focus_out $term
		474
		475	Called wheneever the window loses keyboard focus, before rxvt-unicode does
		476	focus out processing.
		477
		478	=item on_configure_notify $term, $event
		479
		480	=item on_key_press $term, $event, $keysym, $octets
		481
		482	=item on_key_release $term, $event, $keysym
		483
		484	=item on_button_press $term, $event
		485
		486	=item on_button_release $term, $event
		487
		488	=item on_motion_notify $term, $event
		489
		490	=item on_map_notify $term, $event
		491
		492	=item on_unmap_notify $term, $event
		493
		494	Called whenever the corresponding X event is received for the terminal If
		495	the hook returns true, then the even will be ignored by rxvt-unicode.
		496
		497	The event is a hash with most values as named by Xlib (see the XEvent
		498	manpage), with the additional members C<row> and C<col>, which are the row
		499	and column under the mouse cursor.
		500
		501	C<on_key_press> additionally receives the string rxvt-unicode would
		502	output, if any, in locale-specific encoding.
		503
		504	subwindow.
		505
		506	=item on_client_message $term, $event
		507
		508	=item on_wm_protocols $term, $event
		509
		510	=item on_wm_delete_window $term, $event
		511
		512	Called when various types of ClientMessage events are received (all with
		513	format=32, WM_PROTOCOLS or WM_PROTOCOLS:WM_DELETE_WINDOW).
		514
		515	=back
		516
		517	=cut
		518
		519	package urxvt;
		520
		521	use utf8;
		522	use strict;
		523	use Carp ();
		524	use Scalar::Util ();
		525	use List::Util ();
		526
		527	our $VERSION = 1;
		528	our $TERM;
		529	our @TERM_INIT;
		530	our @TERM_EXT;
		531	our @HOOKNAME;
		532	our %HOOKTYPE = map +($HOOKNAME[$_] => $_), 0..$#HOOKNAME;
		533	our %OPTION;
		534
		535	our $LIBDIR;
		536	our $RESNAME;
		537	our $RESCLASS;
		538	our $RXVTNAME;
		539
		540	=head2 Variables in the C<urxvt> Package
		541
		542	=over 4
		543
		544	=item $urxvt::LIBDIR
		545
		546	The rxvt-unicode library directory, where, among other things, the perl
		547	modules and scripts are stored.
		548
		549	=item $urxvt::RESCLASS, $urxvt::RESCLASS
		550
		551	The resource class and name rxvt-unicode uses to look up X resources.
		552
		553	=item $urxvt::RXVTNAME
		554
		555	The basename of the installed binaries, usually C<urxvt>.
		556
		557	=item $urxvt::TERM
		558
		559	The current terminal. This variable stores the current C<urxvt::term>
		560	object, whenever a callback/hook is executing.
		561
		562	=item @urxvt::TERM_INIT
		563
		564	All coderefs in this array will be called as methods of the next newly
		565	created C<urxvt::term> object (during the C<on_init> phase). The array
		566	gets cleared before the codereferences that were in it are being executed,
		567	so coderefs can push themselves onto it again if they so desire.
		568
		569	This complements to the perl-eval commandline option, but gets executed
		570	first.
		571
		572	=item @urxvt::TERM_EXT
		573
		574	Works similar to C<@TERM_INIT>, but contains perl package/class names, which
		575	get registered as normal extensions after calling the hooks in C<@TERM_INIT>
		576	but before other extensions. Gets cleared just like C<@TERM_INIT>.
		577
110	=back	578	=back
111		579
112	=head2 Functions in the C<urxvt> Package	580	=head2 Functions in the C<urxvt> Package
113		581
114	=over 4	582	=over 4
…		…
119	costs! The only time this is acceptable is when the terminal process	587	costs! The only time this is acceptable is when the terminal process
120	starts up.	588	starts up.
121		589
122	=item urxvt::warn $string	590	=item urxvt::warn $string
123		591
124	Calls C<rxvt_warn> witht eh given string which should not include a	592	Calls C<rxvt_warn> with the given string which should not include a
125	newline. The module also overwrites the C<warn> builtin with a function	593	newline. The module also overwrites the C<warn> builtin with a function
126	that calls this function.	594	that calls this function.
127		595
128	Using this function has the advantage that its output ends up in the	596	Using this function has the advantage that its output ends up in the
129	correct place, e.g. on stderr of the connecting urxvtc client.	597	correct place, e.g. on stderr of the connecting urxvtc client.
130		598
131	=item $cellwidth = urxvt::wcswidth $string	599	Messages have a size limit of 1023 bytes currently.
132
133	Returns the number of screen-cells this string would need. Correctly
134	accounts for wide and combining characters.
135		600
136	=item $time = urxvt::NOW	601	=item $time = urxvt::NOW
137		602
138	Returns the "current time" (as per the event loop).	603	Returns the "current time" (as per the event loop).
139		604
		605	=item urxvt::CurrentTime
		606
		607	=item urxvt::ShiftMask, LockMask, ControlMask, Mod1Mask, Mod2Mask,
		608	Mod3Mask, Mod4Mask, Mod5Mask, Button1Mask, Button2Mask, Button3Mask,
		609	Button4Mask, Button5Mask, AnyModifier
		610
		611	=item urxvt::NoEventMask, KeyPressMask, KeyReleaseMask,
		612	ButtonPressMask, ButtonReleaseMask, EnterWindowMask, LeaveWindowMask,
		613	PointerMotionMask, PointerMotionHintMask, Button1MotionMask, Button2MotionMask,
		614	Button3MotionMask, Button4MotionMask, Button5MotionMask, ButtonMotionMask,
		615	KeymapStateMask, ExposureMask, VisibilityChangeMask, StructureNotifyMask,
		616	ResizeRedirectMask, SubstructureNotifyMask, SubstructureRedirectMask,
		617	FocusChangeMask, PropertyChangeMask, ColormapChangeMask, OwnerGrabButtonMask
		618
		619	=item urxvt::KeyPress, KeyRelease, ButtonPress, ButtonRelease, MotionNotify,
		620	EnterNotify, LeaveNotify, FocusIn, FocusOut, KeymapNotify, Expose,
		621	GraphicsExpose, NoExpose, VisibilityNotify, CreateNotify, DestroyNotify,
		622	UnmapNotify, MapNotify, MapRequest, ReparentNotify, ConfigureNotify,
		623	ConfigureRequest, GravityNotify, ResizeRequest, CirculateNotify,
		624	CirculateRequest, PropertyNotify, SelectionClear, SelectionRequest,
		625	SelectionNotify, ColormapNotify, ClientMessage, MappingNotify
		626
		627	Various constants for use in X calls and event processing.
		628
		629	=back
		630
		631	=head2 RENDITION
		632
		633	Rendition bitsets contain information about colour, font, font styles and
		634	similar information for each screen cell.
		635
		636	The following "macros" deal with changes in rendition sets. You should
		637	never just create a bitset, you should always modify an existing one,
		638	as they contain important information required for correct operation of
		639	rxvt-unicode.
		640
		641	=over 4
		642
		643	=item $rend = urxvt::DEFAULT_RSTYLE
		644
		645	Returns the default rendition, as used when the terminal is starting up or
		646	being reset. Useful as a base to start when creating renditions.
		647
		648	=item $rend = urxvt::OVERLAY_RSTYLE
		649
		650	Return the rendition mask used for overlays by default.
		651
		652	=item $rendbit = urxvt::RS_Bold, RS_Italic, RS_Blink, RS_RVid, RS_Uline
		653
		654	Return the bit that enabled bold, italic, blink, reverse-video and
		655	underline, respectively. To enable such a style, just logically OR it into
		656	the bitset.
		657
		658	=item $foreground = urxvt::GET_BASEFG $rend
		659
		660	=item $background = urxvt::GET_BASEBG $rend
		661
		662	Return the foreground/background colour index, respectively.
		663
		664	=item $rend = urxvt::SET_FGCOLOR $rend, $new_colour
		665
		666	=item $rend = urxvt::SET_BGCOLOR $rend, $new_colour
		667
		668	Replace the foreground/background colour in the rendition mask with the
		669	specified one.
		670
		671	=item $value = urxvt::GET_CUSTOM $rend
		672
		673	Return the "custom" value: Every rendition has 5 bits for use by
		674	extensions. They can be set and changed as you like and are initially
		675	zero.
		676
		677	=item $rend = urxvt::SET_CUSTOM $rend, $new_value
		678
		679	Change the custom value.
		680
		681	=back
		682
140	=cut	683	=cut
141		684
142	package urxvt;
143
144	use strict;
145
146	our $term;
147	our @HOOKNAME;
148	our $LIBDIR;
149
150	BEGIN {	685	BEGIN {
151	urxvt->bootstrap;
152
153	# overwrite perl's warn	686	# overwrite perl's warn
154	*CORE::GLOBAL::warn = sub {	687	*CORE::GLOBAL::warn = sub {
155	my $msg = join "", @_;	688	my $msg = join "", @_;
156	$msg .= "\n"	689	$msg .= "\n"
157	unless $msg =~ /\n$/;	690	unless $msg =~ /\n$/;
158	urxvt::warn ($msg);	691	urxvt::warn ($msg);
159	};	692	};
160	}	693	}
161		694
162	my $verbosity = $ENV{URXVT_PERL_VERBOSITY} || 10;	695	my $verbosity = $ENV{URXVT_PERL_VERBOSITY};
163		696
164	sub verbose {	697	sub verbose {
165	my ($level, $msg) = @_;	698	my ($level, $msg) = @_;
166	warn "$msg\n"; #d#	699	warn "$msg\n" if $level <= $verbosity;
167	}	700	}
168		701
169	my @invoke_cb;	702	my %extension_pkg;
		703
		704	# load a single script into its own package, once only
		705	sub extension_package($) {
		706	my ($path) = @_;
		707
		708	$extension_pkg{$path} ||= do {
		709	$path =~ /([^\/\\]+)$/;
		710	my $pkg = $1;
		711	$pkg =~ s/[^[:word:]]/_/g;
		712	$pkg = "urxvt::ext::$pkg";
		713
		714	verbose 3, "loading extension '$path' into package '$pkg'";
		715
		716	open my $fh, "<:raw", $path
		717	or die "$path: $!";
		718
		719	my $source =
		720	"package $pkg; use strict; use utf8;\n"
		721	. "#line 1 \"$path\"\n{\n"
		722	. (do { local $/; <$fh> })
		723	. "\n};\n1";
		724
		725	eval $source
		726	or die "$path: $@";
		727
		728	$pkg
		729	}
		730	}
		731
		732	our $retval; # return value for urxvt
170		733
171	# called by the rxvt core	734	# called by the rxvt core
172	sub invoke {	735	sub invoke {
173	local $term = shift;	736	local $TERM = shift;
174	my $htype = shift;	737	my $htype = shift;
175		738
176	my $cb = $invoke_cb[$htype];	739	if ($htype == 0) { # INIT
		740	my @dirs = ((split /:/, $TERM->resource ("perl_lib")), "$LIBDIR/perl");
		741
		742	my %ext_arg;
177		743
178	verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $term, @_) . ")"	744	{
179	if $verbosity >= 10;	745	my @init = @TERM_INIT;
		746	@TERM_INIT = ();
		747	$_->($TERM) for @init;
		748	my @pkg = @TERM_EXT;
		749	@TERM_EXT = ();
		750	$TERM->register_package ($_) for @pkg;
		751	}
180		752
		753	for (grep $_, map { split /,/, $TERM->resource ("perl_ext_$_") } 1, 2) {
		754	if ($_ eq "default") {
		755	$ext_arg{$_} ||= [] for qw(selection option-popup selection-popup searchable-scrollback);
		756	} elsif (/^-(.*)$/) {
		757	delete $ext_arg{$1};
		758	} elsif (/^([^<]+)<(.*)>$/) {
		759	push @{ $ext_arg{$1} }, $2;
		760	} else {
		761	$ext_arg{$_} ||= [];
		762	}
		763	}
		764
181	while (my ($k, $v) = each %$cb) {	765	while (my ($ext, $argv) = each %ext_arg) {
182	return 1 if $v->($term, @_);	766	my @files = grep -f $_, map "$_/$ext", @dirs;
		767
		768	if (@files) {
		769	$TERM->register_package (extension_package $files[0], $argv);
		770	} else {
		771	warn "perl extension '$ext' not found in perl library search path\n";
		772	}
		773	}
		774
		775	eval "#line 1 \"--perl-eval resource/argument\"\n" . $TERM->resource ("perl_eval");
		776	warn $@ if $@;
183	}	777	}
184		778
		779	$retval = undef;
		780
		781	if (my $cb = $TERM->{_hook}[$htype]) {
		782	verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $TERM, @_) . ")"
		783	if $verbosity >= 10;
		784
		785	keys %$cb;
		786
		787	while (my ($pkg, $cb) = each %$cb) {
		788	my $retval_ = eval { $cb->($TERM->{_pkg}{$pkg}, @_) };
		789	$retval ||= $retval_;
		790
		791	if ($@) {
		792	$TERM->ungrab; # better to lose the grab than the session
		793	warn $@;
		794	}
		795	}
		796
		797	verbose 11, "$HOOKNAME[$htype] returning <$retval>"
		798	if $verbosity >= 11;
185	0	799	}
		800
		801	if ($htype == 1) { # DESTROY
		802	# clear package objects
		803	%$_ = () for values %{ $TERM->{_pkg} };
		804
		805	# clear package
		806	%$TERM = ();
		807	}
		808
		809	$retval
186	}	810	}
		811
		812	# urxvt::term::extension
		813
		814	package urxvt::term::extension;
		815
		816	sub enable {
		817	my ($self, %hook) = @_;
		818	my $pkg = $self->{_pkg};
		819
		820	while (my ($name, $cb) = each %hook) {
		821	my $htype = $HOOKTYPE{uc $name};
		822	defined $htype
		823	or Carp::croak "unsupported hook type '$name'";
		824
		825	$self->set_should_invoke ($htype, +1)
		826	unless exists $self->{term}{_hook}[$htype]{$pkg};
		827
		828	$self->{term}{_hook}[$htype]{$pkg} = $cb;
		829	}
		830	}
		831
		832	sub disable {
		833	my ($self, @hook) = @_;
		834	my $pkg = $self->{_pkg};
		835
		836	for my $name (@hook) {
		837	my $htype = $HOOKTYPE{uc $name};
		838	defined $htype
		839	or Carp::croak "unsupported hook type '$name'";
		840
		841	$self->set_should_invoke ($htype, -1)
		842	if delete $self->{term}{_hook}[$htype]{$pkg};
		843	}
		844	}
		845
		846	our $AUTOLOAD;
		847
		848	sub AUTOLOAD {
		849	$AUTOLOAD =~ /:([^:]+)$/
		850	or die "FATAL: \$AUTOLOAD '$AUTOLOAD' unparsable";
		851
		852	eval qq{
		853	sub $AUTOLOAD {
		854	my \$proxy = shift;
		855	\$proxy->{term}->$1 (\@_)
		856	}
		857	1
		858	} or die "FATAL: unable to compile method forwarder: $@";
		859
		860	goto &$AUTOLOAD;
		861	}
		862
		863	sub DESTROY {
		864	# nop
		865	}
		866
		867	# urxvt::destroy_hook
		868
		869	sub urxvt::destroy_hook::DESTROY {
		870	${$_[0]}->();
		871	}
		872
		873	sub urxvt::destroy_hook(&) {
		874	bless \shift, urxvt::destroy_hook::
		875	}
		876
		877	package urxvt::anyevent;
		878
		879	=head2 The C<urxvt::anyevent> Class
		880
		881	The sole purpose of this class is to deliver an interface to the
		882	C<AnyEvent> module - any module using it will work inside urxvt without
		883	further programming. The only exception is that you cannot wait on
		884	condition variables, but non-blocking condvar use is ok. What this means
		885	is that you cannot use blocking APIs, but the non-blocking variant should
		886	work.
		887
		888	=cut
		889
		890	our $VERSION = 1;
		891
		892	$INC{"urxvt/anyevent.pm"} = 1; # mark us as there
		893	push @AnyEvent::REGISTRY, [urxvt => urxvt::anyevent::];
		894
		895	sub timer {
		896	my ($class, %arg) = @_;
		897
		898	my $cb = $arg{cb};
		899
		900	urxvt::timer
		901	->new
		902	->start (urxvt::NOW + $arg{after})
		903	->cb (sub {
		904	$_[0]->stop; # need to cancel manually
		905	$cb->();
		906	})
		907	}
		908
		909	sub io {
		910	my ($class, %arg) = @_;
		911
		912	my $cb = $arg{cb};
		913
		914	bless [$arg{fh}, urxvt::iow
		915	->new
		916	->fd (fileno $arg{fh})
		917	->events (($arg{poll} =~ /r/ ? 1 : 0)
		918	| ($arg{poll} =~ /w/ ? 2 : 0))
		919	->start
		920	->cb (sub {
		921	$cb->(($_[1] & 1 ? 'r' : '')
		922	. ($_[1] & 2 ? 'w' : ''));
		923	})],
		924	urxvt::anyevent::
		925	}
		926
		927	sub DESTROY {
		928	$_[0][1]->stop;
		929	}
		930
		931	sub condvar {
		932	bless \my $flag, urxvt::anyevent::condvar::
		933	}
		934
		935	sub urxvt::anyevent::condvar::broadcast {
		936	${$_[0]}++;
		937	}
		938
		939	sub urxvt::anyevent::condvar::wait {
		940	unless (${$_[0]}) {
		941	Carp::croak "AnyEvent->condvar blocking wait unsupported in urxvt, use a non-blocking API";
		942	}
		943	}
		944
		945	package urxvt::term;
		946
		947	=head2 The C<urxvt::term> Class
		948
		949	=over 4
		950
		951	=cut
187		952
188	# find on_xxx subs in the package and register them	953	# find on_xxx subs in the package and register them
189	# as hooks	954	# as hooks
190	sub register_package($) {	955	sub register_package {
191	my ($pkg) = @_;	956	my ($self, $pkg, $argv) = @_;
192		957
		958	no strict 'refs';
		959
		960	urxvt::verbose 6, "register package $pkg to $self";
		961
		962	@{"$pkg\::ISA"} = urxvt::term::extension::;
		963
		964	my $proxy = bless {
		965	_pkg => $pkg,
		966	argv => $argv,
		967	}, $pkg;
		968	Scalar::Util::weaken ($proxy->{term} = $self);
		969
		970	$self->{_pkg}{$pkg} = $proxy;
		971
193	for my $hook (0.. $#HOOKNAME) {	972	for my $name (@HOOKNAME) {
194	my $name = $HOOKNAME[$hook];
195
196	my $ref = $pkg->can ("on_" . lc $name)	973	if (my $ref = $pkg->can ("on_" . lc $name)) {
197	or next;	974	$proxy->enable ($name => $ref);
198		975	}
199	$invoke_cb[$hook]{$ref*1} = $ref;
200	set_should_invoke $hook, 1;
201	}	976	}
202	}	977	}
203		978
204	my $script_pkg = "script0000";	979	=item $term = new urxvt::term $envhashref, $rxvtname, [arg...]
205	my %script_pkg;
206		980
207	# load a single script into its own package, once only	981	Creates a new terminal, very similar as if you had started it with system
208	sub load_script($) {	982	C<$rxvtname, arg...>. C<$envhashref> must be a reference to a C<%ENV>-like
209	my ($path) = @_;	983	hash which defines the environment of the new terminal.
210		984
211	$script_pkg{$path} ||= do {	985	Croaks (and probably outputs an error message) if the new instance
212	my $pkg = $script_pkg++;	986	couldn't be created. Returns C<undef> if the new instance didn't
213	verbose 3, "loading script '$path' into package '$pkg'";	987	initialise perl, and the terminal object otherwise. The C<init> and
		988	C<start> hooks will be called during this call.
214		989
215	open my $fh, "<:raw", $path	990	=cut
216	or die "$path: $!";
217		991
218	eval "package $pkg; use strict; use utf8;\n"	992	sub new {
219	. "#line 1 \"$path\"\n"	993	my ($class, $env, @args) = @_;
220	. do { local $/; <$fh> }
221	or die "$path: $@";
222		994
223	register_package $pkg;	995	_new ([ map "$_=$env->{$_}", keys %$env ], @args);
224
225	$pkg
226	};
227	}	996	}
228		997
229	load_script $_ for grep -f $_, <$LIBDIR/perl-init/*>;	998	=item $term->destroy
230		999
		1000	Destroy the terminal object (close the window, free resources
		1001	etc.). Please note that @@RXVT_NAME@@ will not exit as long as any event
		1002	watchers (timers, io watchers) are still active.
231		1003
232	=back	1004	=item $term->exec_async ($cmd[, @args])
233		1005
234	=head2 The C<urxvt::term> Class	1006	Works like the combination of the C<fork>/C<exec> builtins, which executes
		1007	("starts") programs in the background. This function takes care of setting
		1008	the user environment before exec'ing the command (e.g. C<PATH>) and should
		1009	be preferred over explicit calls to C<exec> or C<system>.
235		1010
236	=over 4	1011	Returns the pid of the subprocess or C<undef> on error.
		1012
		1013	=cut
		1014
		1015	sub exec_async {
		1016	my $self = shift;
		1017
		1018	my $pid = fork;
		1019
		1020	return $pid
		1021	if !defined $pid or $pid;
		1022
		1023	%ENV = %{ $self->env };
		1024
		1025	exec @_;
		1026	urxvt::_exit 255;
		1027	}
		1028
		1029	=item $isset = $term->option ($optval[, $set])
		1030
		1031	Returns true if the option specified by C<$optval> is enabled, and
		1032	optionally change it. All option values are stored by name in the hash
		1033	C<%urxvt::OPTION>. Options not enabled in this binary are not in the hash.
		1034
		1035	Here is a a likely non-exhaustive list of option names, please see the
		1036	source file F</src/optinc.h> to see the actual list:
		1037
		1038	borderLess console cursorBlink cursorUnderline hold iconic insecure
		1039	intensityStyles jumpScroll loginShell mapAlert meta8 mouseWheelScrollPage
		1040	override-redirect pastableTabs pointerBlank reverseVideo scrollBar
		1041	scrollBar_floating scrollBar_right scrollTtyKeypress scrollTtyOutput
		1042	scrollWithBuffer secondaryScreen secondaryScroll skipBuiltinGlyphs
		1043	transparent tripleclickwords utmpInhibit visualBell
		1044
		1045	=item $value = $term->resource ($name[, $newval])
		1046
		1047	Returns the current resource value associated with a given name and
		1048	optionally sets a new value. Setting values is most useful in the C<init>
		1049	hook. Unset resources are returned and accepted as C<undef>.
		1050
		1051	The new value must be properly encoded to a suitable character encoding
		1052	before passing it to this method. Similarly, the returned value may need
		1053	to be converted from the used encoding to text.
		1054
		1055	Resource names are as defined in F<src/rsinc.h>. Colours can be specified
		1056	as resource names of the form C<< color+<index> >>, e.g. C<color+5>. (will
		1057	likely change).
		1058
		1059	Please note that resource strings will currently only be freed when the
		1060	terminal is destroyed, so changing options frequently will eat memory.
		1061
		1062	Here is a a likely non-exhaustive list of resource names, not all of which
		1063	are supported in every build, please see the source file F</src/rsinc.h>
		1064	to see the actual list:
		1065
		1066	answerbackstring backgroundPixmap backspace_key boldFont boldItalicFont
		1067	borderLess color cursorBlink cursorUnderline cutchars delete_key
		1068	display_name embed ext_bwidth fade font geometry hold iconName
		1069	imFont imLocale inputMethod insecure int_bwidth intensityStyles
		1070	italicFont jumpScroll lineSpace loginShell mapAlert meta8 modifier
		1071	mouseWheelScrollPage name override_redirect pastableTabs path perl_eval
		1072	perl_ext_1 perl_ext_2 perl_lib pointerBlank pointerBlankDelay
		1073	preeditType print_pipe pty_fd reverseVideo saveLines scrollBar
		1074	scrollBar_align scrollBar_floating scrollBar_right scrollBar_thickness
		1075	scrollTtyKeypress scrollTtyOutput scrollWithBuffer scrollstyle
		1076	secondaryScreen secondaryScroll selectstyle shade term_name title
		1077	transient_for transparent transparent_all tripleclickwords utmpInhibit
		1078	visualBell
		1079
		1080	=cut
		1081
		1082	sub resource($$;$) {
		1083	my ($self, $name) = (shift, shift);
		1084	unshift @_, $self, $name, ($name =~ s/\s*\+\s*(\d+)$// ? $1 : 0);
		1085	&urxvt::term::_resource
		1086	}
		1087
		1088	=item $value = $term->x_resource ($pattern)
		1089
		1090	Returns the X-Resource for the given pattern, excluding the program or
		1091	class name, i.e. C<< $term->x_resource ("boldFont") >> should return the
		1092	same value as used by this instance of rxvt-unicode. Returns C<undef> if no
		1093	resource with that pattern exists.
		1094
		1095	This method should only be called during the C<on_start> hook, as there is
		1096	only one resource database per display, and later invocations might return
		1097	the wrong resources.
		1098
		1099	=item $success = $term->parse_keysym ($keysym_spec, $command_string)
		1100
		1101	Adds a keymap translation exactly as specified via a resource. See the
		1102	C<keysym> resource in the @@RXVT_NAME@@(1) manpage.
		1103
		1104	=item $rend = $term->rstyle ([$new_rstyle])
		1105
		1106	Return and optionally change the current rendition. Text that is output by
		1107	the terminal application will use this style.
		1108
		1109	=item ($row, $col) = $term->screen_cur ([$row, $col])
		1110
		1111	Return the current coordinates of the text cursor position and optionally
		1112	set it (which is usually bad as applications don't expect that).
237		1113
238	=item ($row, $col) = $term->selection_mark ([$row, $col])	1114	=item ($row, $col) = $term->selection_mark ([$row, $col])
239		1115
240	=item ($row, $col) = $term->selection_beg ([$row, $col])	1116	=item ($row, $col) = $term->selection_beg ([$row, $col])
241		1117
242	=item ($row, $col) = $term->selection_end ([$row, $col])	1118	=item ($row, $col) = $term->selection_end ([$row, $col])
243		1119
244	Return the current values of the selection mark, begin or end positions,	1120	Return the current values of the selection mark, begin or end positions,
245	and optionally set them to new values.	1121	and optionally set them to new values.
246		1122
		1123	=item $term->selection_make ($eventtime[, $rectangular])
		1124
		1125	Tries to make a selection as set by C<selection_beg> and
		1126	C<selection_end>. If C<$rectangular> is true (default: false), a
		1127	rectangular selection will be made. This is the prefered function to make
		1128	a selection.
		1129
247	=item $success = $term->selection_grab ($eventtime)	1130	=item $success = $term->selection_grab ($eventtime)
248		1131
249	Try to request the primary selection from the server (for example, as set	1132	Try to request the primary selection text from the server (for example, as
250	by the next method).	1133	set by the next method). No visual feedback will be given. This function
		1134	is mostly useful from within C<on_sel_grab> hooks.
251		1135
252	=item $oldtext = $term->selection ([$newtext])	1136	=item $oldtext = $term->selection ([$newtext])
253		1137
254	Return the current selection text and optionally replace it by C<$newtext>.	1138	Return the current selection text and optionally replace it by C<$newtext>.
255		1139
256	=item $term->scr_overlay ($x, $y, $text)	1140	=item $term->overlay_simple ($x, $y, $text)
257		1141
258	Create a simple multi-line overlay box. See the next method for details.	1142	Create a simple multi-line overlay box. See the next method for details.
259		1143
260	=cut	1144	=cut
261		1145
262	sub urxvt::term::scr_overlay {	1146	sub overlay_simple {
263	my ($self, $x, $y, $text) = @_;	1147	my ($self, $x, $y, $text) = @_;
264		1148
265	my @lines = split /\n/, $text;	1149	my @lines = split /\n/, $text;
266		1150
267	my $w = 0;	1151	my $w = List::Util::max map $self->strwidth ($_), @lines;
268	for (map urxvt::wcswidth $_, @lines) {	1152
269	$w = $_ if $w < $_;	1153	my $overlay = $self->overlay ($x, $y, $w, scalar @lines);
		1154	$overlay->set (0, $_, $lines[$_]) for 0.. $#lines;
		1155
		1156	$overlay
		1157	}
		1158
		1159	=item $term->overlay ($x, $y, $width, $height[, $rstyle[, $border]])
		1160
		1161	Create a new (empty) overlay at the given position with the given
		1162	width/height. C<$rstyle> defines the initial rendition style
		1163	(default: C<OVERLAY_RSTYLE>).
		1164
		1165	If C<$border> is C<2> (default), then a decorative border will be put
		1166	around the box.
		1167
		1168	If either C<$x> or C<$y> is negative, then this is counted from the
		1169	right/bottom side, respectively.
		1170
		1171	This method returns an urxvt::overlay object. The overlay will be visible
		1172	as long as the perl object is referenced.
		1173
		1174	The methods currently supported on C<urxvt::overlay> objects are:
		1175
		1176	=over 4
		1177
		1178	=item $overlay->set ($x, $y, $text, $rend)
		1179
		1180	Similar to C<< $term->ROW_t >> and C<< $term->ROW_r >> in that it puts
		1181	text in rxvt-unicode's special encoding and an array of rendition values
		1182	at a specific position inside the overlay.
		1183
		1184	=item $overlay->hide
		1185
		1186	If visible, hide the overlay, but do not destroy it.
		1187
		1188	=item $overlay->show
		1189
		1190	If hidden, display the overlay again.
		1191
		1192	=back
		1193
		1194	=item $popup = $term->popup ($event)
		1195
		1196	Creates a new C<urxvt::popup> object that implements a popup menu. The
		1197	C<$event> I<must> be the event causing the menu to pop up (a button event,
		1198	currently).
		1199
		1200	=cut
		1201
		1202	sub popup {
		1203	my ($self, $event) = @_;
		1204
		1205	$self->grab ($event->{time}, 1)
		1206	or return;
		1207
		1208	my $popup = bless {
		1209	term => $self,
		1210	event => $event,
		1211	}, urxvt::popup::;
		1212
		1213	Scalar::Util::weaken $popup->{term};
		1214
		1215	$self->{_destroy}{$popup} = urxvt::destroy_hook { $popup->{popup}->destroy };
		1216	Scalar::Util::weaken $self->{_destroy}{$popup};
		1217
		1218	$popup
		1219	}
		1220
		1221	=item $cellwidth = $term->strwidth ($string)
		1222
		1223	Returns the number of screen-cells this string would need. Correctly
		1224	accounts for wide and combining characters.
		1225
		1226	=item $octets = $term->locale_encode ($string)
		1227
		1228	Convert the given text string into the corresponding locale encoding.
		1229
		1230	=item $string = $term->locale_decode ($octets)
		1231
		1232	Convert the given locale-encoded octets into a perl string.
		1233
		1234	=item $term->scr_xor_span ($beg_row, $beg_col, $end_row, $end_col[, $rstyle])
		1235
		1236	XORs the rendition values in the given span with the provided value
		1237	(default: C<RS_RVid>), which I<MUST NOT> contain font styles. Useful in
		1238	refresh hooks to provide effects similar to the selection.
		1239
		1240	=item $term->scr_xor_rect ($beg_row, $beg_col, $end_row, $end_col[, $rstyle1[, $rstyle2]])
		1241
		1242	Similar to C<scr_xor_span>, but xors a rectangle instead. Trailing
		1243	whitespace will additionally be xored with the C<$rstyle2>, which defaults
		1244	to C<RS_RVid | RS_Uline>, which removes reverse video again and underlines
		1245	it instead. Both styles I<MUST NOT> contain font styles.
		1246
		1247	=item $term->scr_bell
		1248
		1249	Ring the bell!
		1250
		1251	=item $term->scr_add_lines ($string)
		1252
		1253	Write the given text string to the screen, as if output by the application
		1254	running inside the terminal. It may not contain command sequences (escape
		1255	codes), but is free to use line feeds, carriage returns and tabs. The
		1256	string is a normal text string, not in locale-dependent encoding.
		1257
		1258	Normally its not a good idea to use this function, as programs might be
		1259	confused by changes in cursor position or scrolling. Its useful inside a
		1260	C<on_add_lines> hook, though.
		1261
		1262	=item $term->cmd_parse ($octets)
		1263
		1264	Similar to C<scr_add_lines>, but the argument must be in the
		1265	locale-specific encoding of the terminal and can contain command sequences
		1266	(escape codes) that will be interpreted.
		1267
		1268	=item $term->tt_write ($octets)
		1269
		1270	Write the octets given in C<$data> to the tty (i.e. as program input). To
		1271	pass characters instead of octets, you should convert your strings first
		1272	to the locale-specific encoding using C<< $term->locale_encode >>.
		1273
		1274	=item $old_events = $term->pty_ev_events ([$new_events])
		1275
		1276	Replaces the event mask of the pty watcher by the given event mask. Can
		1277	be used to suppress input and output handling to the pty/tty. See the
		1278	description of C<< urxvt::timer->events >>. Make sure to always restore
		1279	the previous value.
		1280
		1281	=item $windowid = $term->parent
		1282
		1283	Return the window id of the toplevel window.
		1284
		1285	=item $windowid = $term->vt
		1286
		1287	Return the window id of the terminal window.
		1288
		1289	=item $term->vt_emask_add ($x_event_mask)
		1290
		1291	Adds the specified events to the vt event mask. Useful e.g. when you want
		1292	to receive pointer events all the times:
		1293
		1294	$term->vt_emask_add (urxvt::PointerMotionMask);
		1295
		1296	=item $window_width = $term->width
		1297
		1298	=item $window_height = $term->height
		1299
		1300	=item $font_width = $term->fwidth
		1301
		1302	=item $font_height = $term->fheight
		1303
		1304	=item $font_ascent = $term->fbase
		1305
		1306	=item $terminal_rows = $term->nrow
		1307
		1308	=item $terminal_columns = $term->ncol
		1309
		1310	=item $has_focus = $term->focus
		1311
		1312	=item $is_mapped = $term->mapped
		1313
		1314	=item $max_scrollback = $term->saveLines
		1315
		1316	=item $nrow_plus_saveLines = $term->total_rows
		1317
		1318	=item $topmost_scrollback_row = $term->top_row
		1319
		1320	Return various integers describing terminal characteristics.
		1321
		1322	=item $x_display = $term->display_id
		1323
		1324	Return the DISPLAY used by rxvt-unicode.
		1325
		1326	=item $lc_ctype = $term->locale
		1327
		1328	Returns the LC_CTYPE category string used by this rxvt-unicode.
		1329
		1330	=item $env = $term->env
		1331
		1332	Returns a copy of the environment in effect for the terminal as a hashref
		1333	similar to C<\%ENV>.
		1334
		1335	=cut
		1336
		1337	sub env {
		1338	if (my $env = $_[0]->_env) {
		1339	+{ map /^([^=]+)(?:=(.*))?$/s && ($1 => $2), @$env }
		1340	} else {
		1341	+{ %ENV }
270	}	1342	}
271
272	$self->scr_overlay_new ($x, $y, $w, scalar @lines);
273	$self->scr_overlay_set (0, $_, $lines[$_]) for 0.. $#lines;
274	}	1343	}
275		1344
276	=item $term->scr_overlay_new ($x, $y, $width, $height)	1345	=item $modifiermask = $term->ModLevel3Mask
277		1346
278	Create a new (empty) overlay at the given position with the given	1347	=item $modifiermask = $term->ModMetaMask
279	width/height. A border will be put around the box. If either C<$x> or
280	C<$y> is negative, then this is counted from the right/bottom side,
281	respectively.
282		1348
283	=item $term->scr_overlay_off	1349	=item $modifiermask = $term->ModNumLockMask
284		1350
285	Switch the overlay off again.	1351	Return the modifier masks corresponding to the "ISO Level 3 Shift" (often
		1352	AltGr), the meta key (often Alt) and the num lock key, if applicable.
286		1353
287	=item $term->scr_overlay_set_char ($x, $y, $char, $rend = OVERLAY_RSTYLE)	1354	=item $view_start = $term->view_start ([$newvalue])
288		1355
289	Put a single character (specified numerically) at the given overlay	1356	Returns the row number of the topmost displayed line. Maximum value is
290	position.	1357	C<0>, which displays the normal terminal contents. Lower values scroll
		1358	this many lines into the scrollback buffer.
291		1359
292	=item $term->scr_overlay_set ($x, $y, $text)	1360	=item $term->want_refresh
293		1361
294	Write a string at the given position into the overlay.	1362	Requests a screen refresh. At the next opportunity, rxvt-unicode will
		1363	compare the on-screen display with its stored representation. If they
		1364	differ, it redraws the differences.
		1365
		1366	Used after changing terminal contents to display them.
		1367
		1368	=item $text = $term->ROW_t ($row_number[, $new_text[, $start_col]])
		1369
		1370	Returns the text of the entire row with number C<$row_number>. Row C<0>
		1371	is the topmost terminal line, row C<< $term->$ncol-1 >> is the bottommost
		1372	terminal line. The scrollback buffer starts at line C<-1> and extends to
		1373	line C<< -$term->nsaved >>. Nothing will be returned if a nonexistent line
		1374	is requested.
		1375
		1376	If C<$new_text> is specified, it will replace characters in the current
		1377	line, starting at column C<$start_col> (default C<0>), which is useful
		1378	to replace only parts of a line. The font index in the rendition will
		1379	automatically be updated.
		1380
		1381	C<$text> is in a special encoding: tabs and wide characters that use more
		1382	than one cell when displayed are padded with urxvt::NOCHAR characters
		1383	(C<chr 65535>). Characters with combining characters and other characters
		1384	that do not fit into the normal tetx encoding will be replaced with
		1385	characters in the private use area.
		1386
		1387	You have to obey this encoding when changing text. The advantage is
		1388	that C<substr> and similar functions work on screen cells and not on
		1389	characters.
		1390
		1391	The methods C<< $term->special_encode >> and C<< $term->special_decode >>
		1392	can be used to convert normal strings into this encoding and vice versa.
		1393
		1394	=item $rend = $term->ROW_r ($row_number[, $new_rend[, $start_col]])
		1395
		1396	Like C<< $term->ROW_t >>, but returns an arrayref with rendition
		1397	bitsets. Rendition bitsets contain information about colour, font, font
		1398	styles and similar information. See also C<< $term->ROW_t >>.
		1399
		1400	When setting rendition, the font mask will be ignored.
		1401
		1402	See the section on RENDITION, above.
		1403
		1404	=item $length = $term->ROW_l ($row_number[, $new_length])
		1405
		1406	Returns the number of screen cells that are in use ("the line
		1407	length"). Unlike the urxvt core, this returns C<< $term->ncol >> if the
		1408	line is joined with the following one.
		1409
		1410	=item $bool = $term->is_longer ($row_number)
		1411
		1412	Returns true if the row is part of a multiple-row logical "line" (i.e.
		1413	joined with the following row), which means all characters are in use
		1414	and it is continued on the next row (and possibly a continuation of the
		1415	previous row(s)).
		1416
		1417	=item $line = $term->line ($row_number)
		1418
		1419	Create and return a new C<urxvt::line> object that stores information
		1420	about the logical line that row C<$row_number> is part of. It supports the
		1421	following methods:
		1422
		1423	=over 4
		1424
		1425	=item $text = $line->t ([$new_text])
		1426
		1427	Returns or replaces the full text of the line, similar to C<ROW_t>
		1428
		1429	=item $rend = $line->r ([$new_rend])
		1430
		1431	Returns or replaces the full rendition array of the line, similar to C<ROW_r>
		1432
		1433	=item $length = $line->l
		1434
		1435	Returns the length of the line in cells, similar to C<ROW_l>.
		1436
		1437	=item $rownum = $line->beg
		1438
		1439	=item $rownum = $line->end
		1440
		1441	Return the row number of the first/last row of the line, respectively.
		1442
		1443	=item $offset = $line->offset_of ($row, $col)
		1444
		1445	Returns the character offset of the given row|col pair within the logical
		1446	line. Works for rows outside the line, too, and returns corresponding
		1447	offsets outside the string.
		1448
		1449	=item ($row, $col) = $line->coord_of ($offset)
		1450
		1451	Translates a string offset into terminal coordinates again.
295		1452
296	=back	1453	=back
		1454
		1455	=cut
		1456
		1457	sub line {
		1458	my ($self, $row) = @_;
		1459
		1460	my $maxrow = $self->nrow - 1;
		1461
		1462	my ($beg, $end) = ($row, $row);
		1463
		1464	--$beg while $self->ROW_is_longer ($beg - 1);
		1465	++$end while $self->ROW_is_longer ($end) && $end < $maxrow;
		1466
		1467	bless {
		1468	term => $self,
		1469	beg => $beg,
		1470	end => $end,
		1471	ncol => $self->ncol,
		1472	len => ($end - $beg) * $self->ncol + $self->ROW_l ($end),
		1473	}, urxvt::line::
		1474	}
		1475
		1476	sub urxvt::line::t {
		1477	my ($self) = @_;
		1478
		1479	if (@_ > 1)
		1480	{
		1481	$self->{term}->ROW_t ($_, $_[1], 0, ($_ - $self->{beg}) * $self->{ncol}, $self->{ncol})
		1482	for $self->{beg} .. $self->{end};
		1483	}
		1484
		1485	defined wantarray &&
		1486	substr +(join "", map $self->{term}->ROW_t ($_), $self->{beg} .. $self->{end}),
		1487	0, $self->{len}
		1488	}
		1489
		1490	sub urxvt::line::r {
		1491	my ($self) = @_;
		1492
		1493	if (@_ > 1)
		1494	{
		1495	$self->{term}->ROW_r ($_, $_[1], 0, ($_ - $self->{beg}) * $self->{ncol}, $self->{ncol})
		1496	for $self->{beg} .. $self->{end};
		1497	}
		1498
		1499	if (defined wantarray) {
		1500	my $rend = [
		1501	map @{ $self->{term}->ROW_r ($_) }, $self->{beg} .. $self->{end}
		1502	];
		1503	$#$rend = $self->{len} - 1;
		1504	return $rend;
		1505	}
		1506
		1507	()
		1508	}
		1509
		1510	sub urxvt::line::beg { $_[0]{beg} }
		1511	sub urxvt::line::end { $_[0]{end} }
		1512	sub urxvt::line::l { $_[0]{len} }
		1513
		1514	sub urxvt::line::offset_of {
		1515	my ($self, $row, $col) = @_;
		1516
		1517	($row - $self->{beg}) * $self->{ncol} + $col
		1518	}
		1519
		1520	sub urxvt::line::coord_of {
		1521	my ($self, $offset) = @_;
		1522
		1523	use integer;
		1524
		1525	(
		1526	$offset / $self->{ncol} + $self->{beg},
		1527	$offset % $self->{ncol}
		1528	)
		1529	}
		1530
		1531	=item $text = $term->special_encode $string
		1532
		1533	Converts a perl string into the special encoding used by rxvt-unicode,
		1534	where one character corresponds to one screen cell. See
		1535	C<< $term->ROW_t >> for details.
		1536
		1537	=item $string = $term->special_decode $text
		1538
		1539	Converts rxvt-unicodes text reprsentation into a perl string. See
		1540	C<< $term->ROW_t >> for details.
		1541
		1542	=item $success = $term->grab_button ($button, $modifiermask)
		1543
		1544	Registers a synchronous button grab. See the XGrabButton manpage.
		1545
		1546	=item $success = $term->grab ($eventtime[, $sync])
		1547
		1548	Calls XGrabPointer and XGrabKeyboard in asynchronous (default) or
		1549	synchronous (C<$sync> is true). Also remembers the grab timestampe.
		1550
		1551	=item $term->allow_events_async
		1552
		1553	Calls XAllowEvents with AsyncBoth for the most recent grab.
		1554
		1555	=item $term->allow_events_sync
		1556
		1557	Calls XAllowEvents with SyncBoth for the most recent grab.
		1558
		1559	=item $term->allow_events_replay
		1560
		1561	Calls XAllowEvents with both ReplayPointer and ReplayKeyboard for the most
		1562	recent grab.
		1563
		1564	=item $term->ungrab
		1565
		1566	Calls XUngrab for the most recent grab. Is called automatically on
		1567	evaluation errors, as it is better to lose the grab in the error case as
		1568	the session.
		1569
		1570	=back
		1571
		1572	=cut
		1573
		1574	package urxvt::popup;
		1575
		1576	=head2 The C<urxvt::popup> Class
		1577
		1578	=over 4
		1579
		1580	=cut
		1581
		1582	sub add_item {
		1583	my ($self, $item) = @_;
		1584
		1585	$item->{rend}{normal} = "\x1b[0;30;47m" unless exists $item->{rend}{normal};
		1586	$item->{rend}{hover} = "\x1b[0;30;46m" unless exists $item->{rend}{hover};
		1587	$item->{rend}{active} = "\x1b[m" unless exists $item->{rend}{active};
		1588
		1589	$item->{render} ||= sub { $_[0]{text} };
		1590
		1591	push @{ $self->{item} }, $item;
		1592	}
		1593
		1594	=item $popup->add_title ($title)
		1595
		1596	Adds a non-clickable title to the popup.
		1597
		1598	=cut
		1599
		1600	sub add_title {
		1601	my ($self, $title) = @_;
		1602
		1603	$self->add_item ({
		1604	rend => { normal => "\x1b[38;5;11;44m", hover => "\x1b[38;5;11;44m", active => "\x1b[38;5;11;44m" },
		1605	text => $title,
		1606	activate => sub { },
		1607	});
		1608	}
		1609
		1610	=item $popup->add_separator ([$sepchr])
		1611
		1612	Creates a separator, optionally using the character given as C<$sepchr>.
		1613
		1614	=cut
		1615
		1616	sub add_separator {
		1617	my ($self, $sep) = @_;
		1618
		1619	$sep ||= "=";
		1620
		1621	$self->add_item ({
		1622	rend => { normal => "\x1b[0;30;47m", hover => "\x1b[0;30;47m", active => "\x1b[0;30;47m" },
		1623	text => "",
		1624	render => sub { $sep x $self->{term}->ncol },
		1625	activate => sub { },
		1626	});
		1627	}
		1628
		1629	=item $popup->add_button ($text, $cb)
		1630
		1631	Adds a clickable button to the popup. C<$cb> is called whenever it is
		1632	selected.
		1633
		1634	=cut
		1635
		1636	sub add_button {
		1637	my ($self, $text, $cb) = @_;
		1638
		1639	$self->add_item ({ type => "button", text => $text, activate => $cb});
		1640	}
		1641
		1642	=item $popup->add_toggle ($text, $cb, $initial_value)
		1643
		1644	Adds a toggle/checkbox item to the popup. Teh callback gets called
		1645	whenever it gets toggled, with a boolean indicating its value as its first
		1646	argument.
		1647
		1648	=cut
		1649
		1650	sub add_toggle {
		1651	my ($self, $text, $cb, $value) = @_;
		1652
		1653	my $item; $item = {
		1654	type => "button",
		1655	text => " $text",
		1656	value => $value,
		1657	render => sub { ($_[0]{value} ? "* " : " ") . $text },
		1658	activate => sub { $cb->($_[1]{value} = !$_[1]{value}); },
		1659	};
		1660
		1661	$self->add_item ($item);
		1662	}
		1663
		1664	=item $popup->show
		1665
		1666	Displays the popup (which is initially hidden).
		1667
		1668	=cut
		1669
		1670	sub show {
		1671	my ($self) = @_;
		1672
		1673	local $urxvt::popup::self = $self;
		1674
		1675	my $env = $self->{term}->env;
		1676	# we can't hope to reproduce the locale algorithm, so nuke LC_ALL and set LC_CTYPE.
		1677	delete $env->{LC_ALL};
		1678	$env->{LC_CTYPE} = $self->{term}->locale;
		1679
		1680	urxvt::term->new ($env, "popup",
		1681	"--perl-lib" => "", "--perl-ext-common" => "",
		1682	"-pty-fd" => -1, "-sl" => 0,
		1683	"-b" => 1, "-bd" => "grey80", "-bl", "-override-redirect",
		1684	"--transient-for" => $self->{term}->parent,
		1685	"-display" => $self->{term}->display_id,
		1686	"-pe" => "urxvt-popup")
		1687	or die "unable to create popup window\n";
		1688	}
		1689
		1690	sub DESTROY {
		1691	my ($self) = @_;
		1692
		1693	delete $self->{term}{_destroy}{$self};
		1694	$self->{term}->ungrab;
		1695	}
		1696
		1697	=back
		1698
		1699	=cut
		1700
		1701	package urxvt::watcher;
		1702
		1703	@urxvt::timer::ISA = __PACKAGE__;
		1704	@urxvt::iow::ISA = __PACKAGE__;
		1705	@urxvt::pw::ISA = __PACKAGE__;
		1706	@urxvt::iw::ISA = __PACKAGE__;
297		1707
298	=head2 The C<urxvt::timer> Class	1708	=head2 The C<urxvt::timer> Class
299		1709
300	This class implements timer watchers/events. Time is represented as a	1710	This class implements timer watchers/events. Time is represented as a
301	fractional number of seconds since the epoch. Example:	1711	fractional number of seconds since the epoch. Example:
302		1712
303	# create a digital clock display in upper right corner	1713	$term->{overlay} = $term->overlay (-1, 0, 8, 1, urxvt::OVERLAY_RSTYLE, 0);
304	$term->{timer} = urxvt::timer	1714	$term->{timer} = urxvt::timer
305	->new	1715	->new
306	->start (urxvt::NOW)	1716	->interval (1)
307	->cb (sub {	1717	->cb (sub {
308	my ($timer) = @_;
309	my $time = $timer->at;
310	$timer->start ($time + 1);
311	$self->scr_overlay (-1, 0,	1718	$term->{overlay}->set (0, 0,
312	POSIX::strftime "%H:%M:%S", localtime $time);	1719	sprintf "%2d:%02d:%02d", (localtime urxvt::NOW)[2,1,0]);
313	});	1720	});
314		1721
315	=over 4	1722	=over 4
316		1723
317	=item $timer = new urxvt::timer	1724	=item $timer = new urxvt::timer
318		1725
319	Create a new timer object in stopped state.	1726	Create a new timer object in started state. It is scheduled to fire
		1727	immediately.
320		1728
321	=item $timer = $timer->cb (sub { my ($timer) = @_; ... })	1729	=item $timer = $timer->cb (sub { my ($timer) = @_; ... })
322		1730
323	Set the callback to be called when the timer triggers.	1731	Set the callback to be called when the timer triggers.
324		1732
…		…
328		1736
329	=item $timer = $timer->set ($tstamp)	1737	=item $timer = $timer->set ($tstamp)
330		1738
331	Set the time the event is generated to $tstamp.	1739	Set the time the event is generated to $tstamp.
332		1740
		1741	=item $timer = $timer->interval ($interval)
		1742
		1743	Normally (and when C<$interval> is C<0>), the timer will automatically
		1744	stop after it has fired once. If C<$interval> is non-zero, then the timer
		1745	is automatically rescheduled at the given intervals.
		1746
333	=item $timer = $timer->start	1747	=item $timer = $timer->start
334		1748
335	Start the timer.	1749	Start the timer.
336		1750
337	=item $timer = $timer->start ($tstamp)	1751	=item $timer = $timer->start ($tstamp)
338		1752
339	Set the event trigger time to C<$tstamp> and start the timer.	1753	Set the event trigger time to C<$tstamp> and start the timer.
		1754
		1755	=item $timer = $timer->after ($delay)
		1756
		1757	Like C<start>, but sets the expiry timer to c<urxvt::NOW + $delay>.
340		1758
341	=item $timer = $timer->stop	1759	=item $timer = $timer->stop
342		1760
343	Stop the timer.	1761	Stop the timer.
344		1762
…		…
350		1768
351	$term->{socket} = ...	1769	$term->{socket} = ...
352	$term->{iow} = urxvt::iow	1770	$term->{iow} = urxvt::iow
353	->new	1771	->new
354	->fd (fileno $term->{socket})	1772	->fd (fileno $term->{socket})
355	->events (1) # wait for read data	1773	->events (urxvt::EVENT_READ)
356	->start	1774	->start
357	->cb (sub {	1775	->cb (sub {
358	my ($iow, $revents) = @_;	1776	my ($iow, $revents) = @_;
359	# $revents must be 1 here, no need to check	1777	# $revents must be 1 here, no need to check
360	sysread $term->{socket}, my $buf, 8192	1778	sysread $term->{socket}, my $buf, 8192
…		…
377		1795
378	Set the filedescriptor (not handle) to watch.	1796	Set the filedescriptor (not handle) to watch.
379		1797
380	=item $iow = $iow->events ($eventmask)	1798	=item $iow = $iow->events ($eventmask)
381		1799
382	Set the event mask to watch. Bit #0 (value C<1>) enables watching for read	1800	Set the event mask to watch. The only allowed values are
383	data, Bit #1 (value C<2>) enables watching for write data.	1801	C<urxvt::EVENT_READ> and C<urxvt::EVENT_WRITE>, which might be ORed
		1802	together, or C<urxvt::EVENT_NONE>.
384		1803
385	=item $iow = $iow->start	1804	=item $iow = $iow->start
386		1805
387	Start watching for requested events on the given handle.	1806	Start watching for requested events on the given handle.
388		1807
389	=item $iow = $iow->stop	1808	=item $iow = $iow->stop
390		1809
391	Stop watching for events on the given filehandle.	1810	Stop watching for events on the given filehandle.
		1811
		1812	=back
		1813
		1814	=head2 The C<urxvt::iw> Class
		1815
		1816	This class implements idle watchers, that get called automatically when
		1817	the process is idle. They should return as fast as possible, after doing
		1818	some useful work.
		1819
		1820	=over 4
		1821
		1822	=item $iw = new urxvt::iw
		1823
		1824	Create a new idle watcher object in stopped state.
		1825
		1826	=item $iw = $iw->cb (sub { my ($iw) = @_; ... })
		1827
		1828	Set the callback to be called when the watcher triggers.
		1829
		1830	=item $timer = $timer->start
		1831
		1832	Start the watcher.
		1833
		1834	=item $timer = $timer->stop
		1835
		1836	Stop the watcher.
		1837
		1838	=back
		1839
		1840	=head2 The C<urxvt::pw> Class
		1841
		1842	This class implements process watchers. They create an event whenever a
		1843	process exits, after which they stop automatically.
		1844
		1845	my $pid = fork;
		1846	...
		1847	$term->{pw} = urxvt::pw
		1848	->new
		1849	->start ($pid)
		1850	->cb (sub {
		1851	my ($pw, $exit_status) = @_;
		1852	...
		1853	});
		1854
		1855	=over 4
		1856
		1857	=item $pw = new urxvt::pw
		1858
		1859	Create a new process watcher in stopped state.
		1860
		1861	=item $pw = $pw->cb (sub { my ($pw, $exit_status) = @_; ... })
		1862
		1863	Set the callback to be called when the timer triggers.
		1864
		1865	=item $pw = $timer->start ($pid)
		1866
		1867	Tells the wqtcher to start watching for process C<$pid>.
		1868
		1869	=item $pw = $pw->stop
		1870
		1871	Stop the watcher.
		1872
		1873	=back
		1874
		1875	=head1 ENVIRONMENT
		1876
		1877	=head2 URXVT_PERL_VERBOSITY
		1878
		1879	This variable controls the verbosity level of the perl extension. Higher
		1880	numbers indicate more verbose output.
		1881
		1882	=over 4
		1883
		1884	=item == 0 - fatal messages
		1885
		1886	=item >= 3 - script loading and management
		1887
		1888	=item >=10 - all called hooks
		1889
		1890	=item >=11 - hook reutrn values
392		1891
393	=back	1892	=back
394		1893
395	=head1 AUTHOR	1894	=head1 AUTHOR
396		1895

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