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Revision 1.135 by root, Sun Feb 12 05:31:53 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	Another example: Programs I use often output "absolute path: " at the
		73	beginning of a line when they process multiple files. The following
		74	pattern matches the filename (note, there is a single space at the very
		75	end):
		76
		77	URxvt.selection.pattern-0: ^(/[^:]+):\
		78
		79	You can look at the source of the selection extension to see more
		80	interesting uses, such as parsing a line from beginning to end.
		81
		82	This extension also offers following bindable keyboard commands:
		83
		84	=over 4
		85
		86	=item rot13
		87
		88	Rot-13 the selection when activated. Used via keyboard trigger:
		89
		90	URxvt.keysym.C-M-r: perl:selection:rot13
		91
		92	=back
		93
		94	=item option-popup (enabled by default)
		95
		96	Binds a popup menu to Ctrl-Button2 that lets you toggle (some) options at
		97	runtime.
		98
		99	Other extensions can extend this popup menu by pushing a code reference
		100	onto C<@{ $term->{option_popup_hook} }>, which gets called whenever the
		101	popup is being displayed.
		102
		103	It's sole argument is the popup menu, which can be modified. It should
		104	either return nothing or a string, the initial boolean value and a code
		105	reference. The string will be used as button text and the code reference
		106	will be called when the toggle changes, with the new boolean value as
		107	first argument.
		108
		109	The following will add an entry C<myoption> that changes
		110	C<$self->{myoption}>:
		111
		112	push @{ $self->{term}{option_popup_hook} }, sub {
		113	("my option" => $myoption, sub { $self->{myoption} = $_[0] })
		114	};
		115
		116	=item selection-popup (enabled by default)
		117
		118	Binds a popup menu to Ctrl-Button3 that lets you convert the selection
		119	text into various other formats/action (such as uri unescaping, perl
		120	evaluation, web-browser starting etc.), depending on content.
		121
		122	Other extensions can extend this popup menu by pushing a code reference
		123	onto C<@{ $term->{selection_popup_hook} }>, which gets called whenever the
		124	popup is being displayed.
		125
		126	It's sole argument is the popup menu, which can be modified. The selection
		127	is in C<$_>, which can be used to decide wether to add something or not.
		128	It should either return nothing or a string and a code reference. The
		129	string will be used as button text and the code reference will be called
		130	when the button gets activated and should transform C<$_>.
		131
		132	The following will add an entry C<a to b> that transforms all C<a>s in
		133	the selection to C<b>s, but only if the selection currently contains any
		134	C<a>s:
		135
		136	push @{ $self->{term}{selection_popup_hook} }, sub {
		137	/a/ ? ("a to be" => sub { s/a/b/g }
		138	: ()
		139	};
		140
		141	=item searchable-scrollback<hotkey> (enabled by default)
		142
		143	Adds regex search functionality to the scrollback buffer, triggered
		144	by a hotkey (default: C<M-s>). While in search mode, normal terminal
		145	input/output is suspended and a regex is displayed at the bottom of the
		146	screen.
		147
		148	Inputting characters appends them to the regex and continues incremental
		149	search. C<BackSpace> removes a character from the regex, C<Up> and C<Down>
		150	search upwards/downwards in the scrollback buffer, C<End> jumps to the
		151	bottom. C<Escape> leaves search mode and returns to the point where search
		152	was started, while C<Enter> or C<Return> stay at the current position and
		153	additionally stores the first match in the current line into the primary
		154	selection.
		155
		156	=item readline (enabled by default)
		157
		158	A support package that tries to make editing with readline easier. At
		159	the moment, it reacts to clicking shift-left mouse button by trying to
		160	move the text cursor to this position. It does so by generating as many
		161	cursor-left or cursor-right keypresses as required (the this only works
		162	for programs that correctly support wide characters).
		163
		164	To avoid too many false positives, this is only done when:
		165
		166	=over 4
		167
		168	=item - the tty is in ICANON state.
		169
		170	=item - the text cursor is visible.
		171
		172	=item - the primary screen is currently being displayed.
		173
		174	=item - the mouse is on the same (multi-row-) line as the text cursor.
		175
		176	=back
		177
		178	The normal selection mechanism isn't disabled, so quick successive clicks
		179	might interfere with selection creation in harmless ways.
		180
		181	=item selection-autotransform
		182
		183	This selection allows you to do automatic transforms on a selection
		184	whenever a selection is made.
		185
		186	It works by specifying perl snippets (most useful is a single C<s///>
		187	operator) that modify C<$_> as resources:
		188
		189	URxvt.selection-autotransform.0: transform
		190	URxvt.selection-autotransform.1: transform
		191	...
		192
		193	For example, the following will transform selections of the form
		194	C<filename:number>, often seen in compiler messages, into C<vi +$filename
		195	$word>:
		196
		197	URxvt.selection-autotransform.0: s/^([^:[:space:]]+):(\\d+):?$/vi +$2 \\Q$1\\E\\x0d/
		198
		199	And this example matches the same,but replaces it with vi-commands you can
		200	paste directly into your (vi :) editor:
		201
		202	URxvt.selection-autotransform.0: s/^([^:[:space:]]+(\\d+):?$/:e \\Q$1\\E\\x0d:$2\\x0d/
		203
		204	Of course, this can be modified to suit your needs and your editor :)
		205
		206	To expand the example above to typical perl error messages ("XXX at
		207	FILENAME line YYY."), you need a slightly more elaborate solution:
		208
		209	URxvt.selection.pattern-0: ( at .*? line \\d+[,.])
		210	URxvt.selection-autotransform.0: s/^ at (.*?) line (\\d+)[,.]$/:e \\Q$1\E\\x0d:$2\\x0d/
		211
		212	The first line tells the selection code to treat the unchanging part of
		213	every error message as a selection pattern, and the second line transforms
		214	the message into vi commands to load the file.
		215
		216	=item tabbed
		217
		218	This transforms the terminal into a tabbar with additional terminals, that
		219	is, it implements what is commonly refered to as "tabbed terminal". The topmost line
		220	displays a "[NEW]" button, which, when clicked, will add a new tab, followed by one
		221	button per tab.
		222
		223	Clicking a button will activate that tab. Pressing B<Shift-Left> and
		224	B<Shift-Right> will switch to the tab left or right of the current one,
		225	while B<Shift-Down> creates a new tab.
		226
		227	The tabbar itself can be configured similarly to a normal terminal, but
		228	with a resource class of C<URxvt.tabbed>. In addition, it supports the
		229	following four resources (shown with defaults):
		230
		231	URxvt.tabbed.tabbar-fg: <colour-index, default 3>
		232	URxvt.tabbed.tabbar-bg: <colour-index, default 0>
		233	URxvt.tabbed.tab-fg: <colour-index, default 0>
		234	URxvt.tabbed.tab-bg: <colour-index, default 1>
		235
		236	See I<COLOR AND GRAPHICS> in the @@RXVT_NAME@@(1) manpage for valid
		237	indices.
		238
		239	=item mark-urls
		240
		241	Uses per-line display filtering (C<on_line_update>) to underline urls and
		242	make them clickable. When middle-clicked, the program specified in the
		243	resource C<urlLauncher> (default C<x-www-browser>) will be started with
		244	the URL as first argument.
		245
		246	=item xim-onthespot
		247
		248	This (experimental) perl extension implements OnTheSpot editing. It does
		249	not work perfectly, and some input methods don't seem to work well with
		250	OnTheSpot editing in general, but it seems to work at leats for SCIM and
		251	kinput2.
		252
		253	You enable it by specifying this extension and a preedit style of
		254	C<OnTheSpot>, i.e.:
		255
		256	@@RXVT_NAME@@ -pt OnTheSpot -pe xim-onthespot
		257
		258	=item automove-background
		259
		260	This is basically a one-line extension that dynamically changes the background pixmap offset
		261	to the window position, in effect creating the same effect as pseudo transparency with
		262	a custom pixmap. No scaling is supported in this mode. Exmaple:
		263
		264	@@RXVT_NAME@@ -pixmap background.xpm -pe automove-background
		265
		266	=item block-graphics-to-ascii
		267
		268	A not very useful example of filtering all text output to the terminal,
		269	by replacing all line-drawing characters (U+2500 .. U+259F) by a
		270	similar-looking ascii character.
		271
		272	=item digital-clock
		273
		274	Displays a digital clock using the built-in overlay.
		275
		276	=item remote-clipboard
		277
		278	Somewhat of a misnomer, this extension adds two menu entries to the
		279	selection popup that allows one ti run external commands to store the
		280	selection somewhere and fetch it again.
		281
		282	We use it to implement a "distributed selection mechanism", which just
		283	means that one command uploads the file to a remote server, and another
		284	reads it.
		285
		286	The commands can be set using the C<URxvt.remote-selection.store> and
		287	C<URxvt.remote-selection.fetch> resources. The first should read the
		288	selection to store from STDIN (always in UTF-8), the second should provide
		289	the selection data on STDOUT (also in UTF-8).
		290
		291	The defaults (which are likely useless to you) use rsh and cat:
		292
		293	URxvt.remote-selection.store: rsh ruth 'cat >/tmp/distributed-selection'
		294	URxvt.remote-selection.fetch: rsh ruth 'cat /tmp/distributed-selection'
		295
		296	=item selection-pastebin
		297
		298	This is a little rarely useful extension that Uploads the selection as
		299	textfile to a remote site (or does other things). (The implementation is
		300	not currently secure for use in a multiuser environment as it writes to
		301	F</tmp> directly.).
		302
		303	It listens to the C<selection-pastebin:remote-pastebin> keyboard command,
		304	i.e.
		305
		306	URxvt.keysym.C-M-e: perl:selection-pastebin:remote-pastebin
		307
		308	Pressing this combination runs a command with C<%> replaced by the name of
		309	the textfile. This command can be set via a resource:
		310
		311	URxvt.selection-pastebin.cmd: rsync -apP % ruth:/var/www/www.ta-sa.org/files/txt/.
		312
		313	And the default is likely not useful to anybody but the few people around
		314	here :)
		315
		316	The name of the textfile is the hex encoded md5 sum of the selection, so
		317	the same content should lead to the same filename.
		318
		319	After a successful upload the selection will be replaced by the text given
		320	in the C<selection-pastebin-url> resource (again, the % is the placeholder
		321	for the filename):
		322
		323	URxvt.selection-pastebin.url: http://www.ta-sa.org/files/txt/%
		324
		325	=item example-refresh-hooks
		326
		327	Displays a very simple digital clock in the upper right corner of the
		328	window. Illustrates overwriting the refresh callbacks to create your own
		329	overlays or changes.
		330
		331	=back
		332
		333	=head1 API DOCUMENTATION
		334
		335	=head2 General API Considerations
		336
		337	All objects (such as terminals, time watchers etc.) are typical
		338	reference-to-hash objects. The hash can be used to store anything you
		339	like. All members starting with an underscore (such as C<_ptr> or
		340	C<_hook>) are reserved for internal uses and B<MUST NOT> be accessed or
		341	modified).
		342
		343	When objects are destroyed on the C++ side, the perl object hashes are
		344	emptied, so its best to store related objects such as time watchers and
		345	the like inside the terminal object so they get destroyed as soon as the
		346	terminal is destroyed.
		347
		348	Argument names also often indicate the type of a parameter. Here are some
		349	hints on what they mean:
		350
		351	=over 4
		352
		353	=item $text
		354
		355	Rxvt-unicodes special way of encoding text, where one "unicode" character
		356	always represents one screen cell. See L<ROW_t> for a discussion of this format.
		357
		358	=item $string
		359
		360	A perl text string, with an emphasis on I<text>. It can store all unicode
		361	characters and is to be distinguished with text encoded in a specific
		362	encoding (often locale-specific) and binary data.
		363
		364	=item $octets
		365
		366	Either binary data or - more common - a text string encoded in a
		367	locale-specific way.
		368
		369	=back
		370
		371	=head2 Extension Objects
		372
		373	Very perl extension is a perl class. A separate perl object is created
		374	for each terminal and each extension and passed as the first parameter to
		375	hooks. So extensions can use their C<$self> object without having to think
		376	about other extensions, with the exception of methods and members that
		377	begin with an underscore character C<_>: these are reserved for internal
		378	use.
		379
		380	Although it isn't a C<urxvt::term> object, you can call all methods of the
		381	C<urxvt::term> class on this object.
		382
		383	It has the following methods and data members:
		384
		385	=over 4
		386
		387	=item $urxvt_term = $self->{term}
		388
		389	Returns the C<urxvt::term> object associated with this instance of the
		390	extension. This member I<must not> be changed in any way.
		391
		392	=item $self->enable ($hook_name => $cb, [$hook_name => $cb..])
		393
		394	Dynamically enable the given hooks (named without the C<on_> prefix) for
		395	this extension, replacing any previous hook. This is useful when you want
		396	to overwrite time-critical hooks only temporarily.
		397
		398	=item $self->disable ($hook_name[, $hook_name..])
		399
		400	Dynamically disable the given hooks.
		401
		402	=back
		403
23	=head2 Hooks	404	=head2 Hooks
24		405
25	The following subroutines can be declared in loaded scripts, and will be called	406	The following subroutines can be declared in extension files, and will be
26	whenever the relevant event happens.	407	called whenever the relevant event happens.
27		408
28	All of them must return a boolean value. If it is true, then the event	409	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,	410	the in the C<Extension Objects> section.
		411
		412	B<All> of these hooks must return a boolean value. If any of the called
		413	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.	414	relevant action might not be carried out by the C++ code.
31		415
32	When in doubt, return a false value (preferably C<()>).	416	I<< When in doubt, return a false value (preferably C<()>). >>
33		417
34	=over 4	418	=over 4
35		419
36	=item on_init $term	420	=item on_init $term
37		421
38	Called after a new terminal object has been initialized, but before	422	Called after a new terminal object has been initialized, but before
39	windows are created or the command gets run.	423	windows are created or the command gets run. Most methods are unsafe to
		424	call or deliver senseless data, as terminal size and other characteristics
		425	have not yet been determined. You can safely query and change resources
		426	and options, though. For many purposes the C<on_start> hook is a better
		427	place.
		428
		429	=item on_start $term
		430
		431	Called at the very end of initialisation of a new terminal, just before
		432	trying to map (display) the toplevel and returning to the mainloop.
		433
		434	=item on_destroy $term
		435
		436	Called whenever something tries to destroy terminal, when the terminal is
		437	still fully functional (not for long, though).
40		438
41	=item on_reset $term	439	=item on_reset $term
42		440
43	Called after the screen is "reset" for any reason, such as resizing or	441	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	442	control sequences. Here is where you can react on changes to size-related
45	variables.	443	variables.
46		444
47	=item on_start $term	445	=item on_child_start $term, $pid
48		446
49	Called at the very end of initialisation of a new terminal, just before	447	Called just after the child process has been C<fork>ed.
50	returning to the mainloop.	448
		449	=item on_child_exit $term, $status
		450
		451	Called just after the child process has exited. C<$status> is the status
		452	from C<waitpid>.
51		453
52	=item on_sel_make $term, $eventtime	454	=item on_sel_make $term, $eventtime
53		455
54	Called whenever a selection has been made by the user, but before the	456	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	457	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	466	requested from the server. The selection text can be queried and changed
65	by calling C<< $term->selection >>.	467	by calling C<< $term->selection >>.
66		468
67	Returning a true value aborts selection grabbing. It will still be hilighted.	469	Returning a true value aborts selection grabbing. It will still be hilighted.
68		470
69	=item on_focus_in $term	471	=item on_sel_extend $term
70		472
71	Called whenever the window gets the keyboard focus, before urxvt does	473	Called whenever the user tries to extend the selection (e.g. with a double
72	focus in processing.	474	click) and is either supposed to return false (normal operation), or
		475	should extend the selection itelf and return true to suppress the built-in
		476	processing. This can happen multiple times, as long as the callback
		477	returns true, it will be called on every further click by the user and is
		478	supposed to enlarge the selection more and more, if possible.
73		479
74	=item on_focus_out $term	480	See the F<selection> example extension.
75
76	Called wheneever the window loses keyboard focus, before urxvt does focus
77	out processing.
78		481
79	=item on_view_change $term, $offset	482	=item on_view_change $term, $offset
80		483
81	Called whenever the view offset changes, i..e the user or program	484	Called whenever the view offset changes, i..e the user or program
82	scrolls. Offset C<0> means display the normal terminal, positive values	485	scrolls. Offset C<0> means display the normal terminal, positive values
…		…
90		493
91	It is called before lines are scrolled out (so rows 0 .. min ($lines - 1,	494	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	495	$nrow - 1) represent the lines to be scrolled out). C<$saved> is the total
93	number of lines that will be in the scrollback buffer.	496	number of lines that will be in the scrollback buffer.
94		497
95	=item on_tty_activity $term *NYI*	498	=item on_osc_seq $term, $string
96		499
97	Called whenever the program(s) running in the urxvt window send output.	500	Called whenever the B<ESC ] 777 ; string ST> command sequence (OSC =
		501	operating system command) is processed. Cursor position and other state
		502	information is up-to-date when this happens. For interoperability, the
		503	string should start with the extension name and a colon, to distinguish
		504	it from commands for other extensions, and this might be enforced in the
		505	future.
		506
		507	Be careful not ever to trust (in a security sense) the data you receive,
		508	as its source can not easily be controleld (e-mail content, messages from
		509	other users on the same system etc.).
		510
		511	=item on_add_lines $term, $string
		512
		513	Called whenever text is about to be output, with the text as argument. You
		514	can filter/change and output the text yourself by returning a true value
		515	and calling C<< $term->scr_add_lines >> yourself. Please note that this
		516	might be very slow, however, as your hook is called for B<all> text being
		517	output.
		518
		519	=item on_tt_write $term, $octets
		520
		521	Called whenever some data is written to the tty/pty and can be used to
		522	suppress or filter tty input.
		523
		524	=item on_line_update $term, $row
		525
		526	Called whenever a line was updated or changed. Can be used to filter
		527	screen output (e.g. underline urls or other useless stuff). Only lines
		528	that are being shown will be filtered, and, due to performance reasons,
		529	not always immediately.
		530
		531	The row number is always the topmost row of the line if the line spans
		532	multiple rows.
		533
		534	Please note that, if you change the line, then the hook might get called
		535	later with the already-modified line (e.g. if unrelated parts change), so
		536	you cannot just toggle rendition bits, but only set them.
98		537
99	=item on_refresh_begin $term	538	=item on_refresh_begin $term
100		539
101	Called just before the screen gets redrawn. Can be used for overlay	540	Called just before the screen gets redrawn. Can be used for overlay
102	or similar effects by modify terminal contents in refresh_begin, and	541	or similar effects by modify terminal contents in refresh_begin, and
…		…
105		544
106	=item on_refresh_end $term	545	=item on_refresh_end $term
107		546
108	Called just after the screen gets redrawn. See C<on_refresh_begin>.	547	Called just after the screen gets redrawn. See C<on_refresh_begin>.
109		548
		549	=item on_user_command $term, $string
		550
		551	Called whenever the a user-configured event is being activated (e.g. via
		552	a C<perl:string> action bound to a key, see description of the B<keysym>
		553	resource in the @@RXVT_NAME@@(1) manpage).
		554
		555	The event is simply the action string. This interface is assumed to change
		556	slightly in the future.
		557
		558	=item on_resize_all_windows $tern, $new_width, $new_height
		559
		560	Called just after the new window size has been calculcated, but before
		561	windows are actually being resized or hints are being set. If this hook
		562	returns TRUE, setting of the window hints is being skipped.
		563
		564	=item on_x_event $term, $event
		565
		566	Called on every X event received on the vt window (and possibly other
		567	windows). Should only be used as a last resort. Most event structure
		568	members are not passed.
		569
		570	=item on_focus_in $term
		571
		572	Called whenever the window gets the keyboard focus, before rxvt-unicode
		573	does focus in processing.
		574
		575	=item on_focus_out $term
		576
		577	Called wheneever the window loses keyboard focus, before rxvt-unicode does
		578	focus out processing.
		579
		580	=item on_configure_notify $term, $event
		581
		582	=item on_property_notify $term, $event
		583
		584	=item on_key_press $term, $event, $keysym, $octets
		585
		586	=item on_key_release $term, $event, $keysym
		587
		588	=item on_button_press $term, $event
		589
		590	=item on_button_release $term, $event
		591
		592	=item on_motion_notify $term, $event
		593
		594	=item on_map_notify $term, $event
		595
		596	=item on_unmap_notify $term, $event
		597
		598	Called whenever the corresponding X event is received for the terminal If
		599	the hook returns true, then the even will be ignored by rxvt-unicode.
		600
		601	The event is a hash with most values as named by Xlib (see the XEvent
		602	manpage), with the additional members C<row> and C<col>, which are the
		603	(real, not screen-based) row and column under the mouse cursor.
		604
		605	C<on_key_press> additionally receives the string rxvt-unicode would
		606	output, if any, in locale-specific encoding.
		607
		608	subwindow.
		609
		610	=item on_client_message $term, $event
		611
		612	=item on_wm_protocols $term, $event
		613
		614	=item on_wm_delete_window $term, $event
		615
		616	Called when various types of ClientMessage events are received (all with
		617	format=32, WM_PROTOCOLS or WM_PROTOCOLS:WM_DELETE_WINDOW).
		618
		619	=back
		620
		621	=cut
		622
		623	package urxvt;
		624
		625	use utf8;
		626	use strict;
		627	use Carp ();
		628	use Scalar::Util ();
		629	use List::Util ();
		630
		631	our $VERSION = 1;
		632	our $TERM;
		633	our @TERM_INIT;
		634	our @TERM_EXT;
		635	our @HOOKNAME;
		636	our %HOOKTYPE = map +($HOOKNAME[$_] => $_), 0..$#HOOKNAME;
		637	our %OPTION;
		638
		639	our $LIBDIR;
		640	our $RESNAME;
		641	our $RESCLASS;
		642	our $RXVTNAME;
		643
		644	our $NOCHAR = chr 0xffff;
		645
		646	=head2 Variables in the C<urxvt> Package
		647
		648	=over 4
		649
		650	=item $urxvt::LIBDIR
		651
		652	The rxvt-unicode library directory, where, among other things, the perl
		653	modules and scripts are stored.
		654
		655	=item $urxvt::RESCLASS, $urxvt::RESCLASS
		656
		657	The resource class and name rxvt-unicode uses to look up X resources.
		658
		659	=item $urxvt::RXVTNAME
		660
		661	The basename of the installed binaries, usually C<urxvt>.
		662
		663	=item $urxvt::TERM
		664
		665	The current terminal. This variable stores the current C<urxvt::term>
		666	object, whenever a callback/hook is executing.
		667
		668	=item @urxvt::TERM_INIT
		669
		670	All coderefs in this array will be called as methods of the next newly
		671	created C<urxvt::term> object (during the C<on_init> phase). The array
		672	gets cleared before the codereferences that were in it are being executed,
		673	so coderefs can push themselves onto it again if they so desire.
		674
		675	This complements to the perl-eval commandline option, but gets executed
		676	first.
		677
		678	=item @urxvt::TERM_EXT
		679
		680	Works similar to C<@TERM_INIT>, but contains perl package/class names, which
		681	get registered as normal extensions after calling the hooks in C<@TERM_INIT>
		682	but before other extensions. Gets cleared just like C<@TERM_INIT>.
		683
110	=back	684	=back
111		685
112	=head2 Functions in the C<urxvt> Package	686	=head2 Functions in the C<urxvt> Package
113		687
114	=over 4	688	=over 4
…		…
119	costs! The only time this is acceptable is when the terminal process	693	costs! The only time this is acceptable is when the terminal process
120	starts up.	694	starts up.
121		695
122	=item urxvt::warn $string	696	=item urxvt::warn $string
123		697
124	Calls C<rxvt_warn> witht eh given string which should not include a	698	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	699	newline. The module also overwrites the C<warn> builtin with a function
126	that calls this function.	700	that calls this function.
127		701
128	Using this function has the advantage that its output ends up in the	702	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.	703	correct place, e.g. on stderr of the connecting urxvtc client.
130		704
131	=item $cellwidth = urxvt::wcswidth $string	705	Messages have a size limit of 1023 bytes currently.
132		706
133	Returns the number of screen-cells this string would need. Correctly	707	=item @terms = urxvt::termlist
134	accounts for wide and combining characters.	708
		709	Returns all urxvt::term objects that exist in this process, regardless of
		710	wether they are started, being destroyed etc., so be careful. Only term
		711	objects that have perl extensions attached will be returned (because there
		712	is no urxvt::term objet associated with others).
135		713
136	=item $time = urxvt::NOW	714	=item $time = urxvt::NOW
137		715
138	Returns the "current time" (as per the event loop).	716	Returns the "current time" (as per the event loop).
139		717
		718	=item urxvt::CurrentTime
		719
		720	=item urxvt::ShiftMask, LockMask, ControlMask, Mod1Mask, Mod2Mask,
		721	Mod3Mask, Mod4Mask, Mod5Mask, Button1Mask, Button2Mask, Button3Mask,
		722	Button4Mask, Button5Mask, AnyModifier
		723
		724	=item urxvt::NoEventMask, KeyPressMask, KeyReleaseMask,
		725	ButtonPressMask, ButtonReleaseMask, EnterWindowMask, LeaveWindowMask,
		726	PointerMotionMask, PointerMotionHintMask, Button1MotionMask, Button2MotionMask,
		727	Button3MotionMask, Button4MotionMask, Button5MotionMask, ButtonMotionMask,
		728	KeymapStateMask, ExposureMask, VisibilityChangeMask, StructureNotifyMask,
		729	ResizeRedirectMask, SubstructureNotifyMask, SubstructureRedirectMask,
		730	FocusChangeMask, PropertyChangeMask, ColormapChangeMask, OwnerGrabButtonMask
		731
		732	=item urxvt::KeyPress, KeyRelease, ButtonPress, ButtonRelease, MotionNotify,
		733	EnterNotify, LeaveNotify, FocusIn, FocusOut, KeymapNotify, Expose,
		734	GraphicsExpose, NoExpose, VisibilityNotify, CreateNotify, DestroyNotify,
		735	UnmapNotify, MapNotify, MapRequest, ReparentNotify, ConfigureNotify,
		736	ConfigureRequest, GravityNotify, ResizeRequest, CirculateNotify,
		737	CirculateRequest, PropertyNotify, SelectionClear, SelectionRequest,
		738	SelectionNotify, ColormapNotify, ClientMessage, MappingNotify
		739
		740	Various constants for use in X calls and event processing.
		741
		742	=back
		743
		744	=head2 RENDITION
		745
		746	Rendition bitsets contain information about colour, font, font styles and
		747	similar information for each screen cell.
		748
		749	The following "macros" deal with changes in rendition sets. You should
		750	never just create a bitset, you should always modify an existing one,
		751	as they contain important information required for correct operation of
		752	rxvt-unicode.
		753
		754	=over 4
		755
		756	=item $rend = urxvt::DEFAULT_RSTYLE
		757
		758	Returns the default rendition, as used when the terminal is starting up or
		759	being reset. Useful as a base to start when creating renditions.
		760
		761	=item $rend = urxvt::OVERLAY_RSTYLE
		762
		763	Return the rendition mask used for overlays by default.
		764
		765	=item $rendbit = urxvt::RS_Bold, RS_Italic, RS_Blink, RS_RVid, RS_Uline
		766
		767	Return the bit that enabled bold, italic, blink, reverse-video and
		768	underline, respectively. To enable such a style, just logically OR it into
		769	the bitset.
		770
		771	=item $foreground = urxvt::GET_BASEFG $rend
		772
		773	=item $background = urxvt::GET_BASEBG $rend
		774
		775	Return the foreground/background colour index, respectively.
		776
		777	=item $rend = urxvt::SET_FGCOLOR $rend, $new_colour
		778
		779	=item $rend = urxvt::SET_BGCOLOR $rend, $new_colour
		780
		781	=item $rend = urxvt::SET_COLOR $rend, $new_fg, $new_bg
		782
		783	Replace the foreground/background colour in the rendition mask with the
		784	specified one.
		785
		786	=item $value = urxvt::GET_CUSTOM $rend
		787
		788	Return the "custom" value: Every rendition has 5 bits for use by
		789	extensions. They can be set and changed as you like and are initially
		790	zero.
		791
		792	=item $rend = urxvt::SET_CUSTOM $rend, $new_value
		793
		794	Change the custom value.
		795
		796	=back
		797
140	=cut	798	=cut
141		799
142	package urxvt;
143
144	use strict;
145
146	our $term;
147	our @HOOKNAME;
148	our $LIBDIR;
149
150	BEGIN {	800	BEGIN {
151	urxvt->bootstrap;
152
153	# overwrite perl's warn	801	# overwrite perl's warn
154	*CORE::GLOBAL::warn = sub {	802	*CORE::GLOBAL::warn = sub {
155	my $msg = join "", @_;	803	my $msg = join "", @_;
156	$msg .= "\n"	804	$msg .= "\n"
157	unless $msg =~ /\n$/;	805	unless $msg =~ /\n$/;
158	urxvt::warn ($msg);	806	urxvt::warn ($msg);
159	};	807	};
160	}	808	}
161		809
		810	no warnings 'utf8';
		811
162	my $verbosity = $ENV{URXVT_PERL_VERBOSITY} || 10;	812	my $verbosity = $ENV{URXVT_PERL_VERBOSITY};
163		813
164	sub verbose {	814	sub verbose {
165	my ($level, $msg) = @_;	815	my ($level, $msg) = @_;
166	warn "$msg\n"; #d#	816	warn "$msg\n" if $level <= $verbosity;
167	}	817	}
168		818
169	my @invoke_cb;	819	my %extension_pkg;
		820
		821	# load a single script into its own package, once only
		822	sub extension_package($) {
		823	my ($path) = @_;
		824
		825	$extension_pkg{$path} ||= do {
		826	$path =~ /([^\/\\]+)$/;
		827	my $pkg = $1;
		828	$pkg =~ s/[^[:word:]]/_/g;
		829	$pkg = "urxvt::ext::$pkg";
		830
		831	verbose 3, "loading extension '$path' into package '$pkg'";
		832
		833	open my $fh, "<:raw", $path
		834	or die "$path: $!";
		835
		836	my $source =
		837	"package $pkg; use strict; use utf8; no warnings 'utf8';\n"
		838	. "#line 1 \"$path\"\n{\n"
		839	. (do { local $/; <$fh> })
		840	. "\n};\n1";
		841
		842	eval $source
		843	or die "$path: $@";
		844
		845	$pkg
		846	}
		847	}
		848
		849	our $retval; # return value for urxvt
170		850
171	# called by the rxvt core	851	# called by the rxvt core
172	sub invoke {	852	sub invoke {
173	local $term = shift;	853	local $TERM = shift;
174	my $htype = shift;	854	my $htype = shift;
175		855
176	my $cb = $invoke_cb[$htype];	856	if ($htype == 0) { # INIT
		857	my @dirs = ((split /:/, $TERM->resource ("perl_lib")), "$LIBDIR/perl");
		858
		859	my %ext_arg;
177		860
178	verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $term, @_) . ")"	861	{
179	if $verbosity >= 10;	862	my @init = @TERM_INIT;
		863	@TERM_INIT = ();
		864	$_->($TERM) for @init;
		865	my @pkg = @TERM_EXT;
		866	@TERM_EXT = ();
		867	$TERM->register_package ($_) for @pkg;
		868	}
180		869
181	while (my ($k, $v) = each %$cb) {	870	for (grep $_, map { split /,/, $TERM->resource ("perl_ext_$_") } 1, 2) {
182	return 1 if $v->($term, @_);	871	if ($_ eq "default") {
		872	$ext_arg{$_} ||= [] for qw(selection option-popup selection-popup searchable-scrollback readline);
		873	} elsif (/^-(.*)$/) {
		874	delete $ext_arg{$1};
		875	} elsif (/^([^<]+)<(.*)>$/) {
		876	push @{ $ext_arg{$1} }, $2;
		877	} else {
		878	$ext_arg{$_} ||= [];
		879	}
		880	}
		881
		882	for my $ext (sort keys %ext_arg) {
		883	my @files = grep -f $_, map "$_/$ext", @dirs;
		884
		885	if (@files) {
		886	$TERM->register_package (extension_package $files[0], $ext_arg{$ext});
		887	} else {
		888	warn "perl extension '$ext' not found in perl library search path\n";
		889	}
		890	}
		891
		892	eval "#line 1 \"--perl-eval resource/argument\"\n" . $TERM->resource ("perl_eval");
		893	warn $@ if $@;
183	}	894	}
184		895
		896	$retval = undef;
		897
		898	if (my $cb = $TERM->{_hook}[$htype]) {
		899	verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $TERM, @_) . ")"
		900	if $verbosity >= 10;
		901
		902	keys %$cb;
		903
		904	while (my ($pkg, $cb) = each %$cb) {
		905	my $retval_ = eval { $cb->($TERM->{_pkg}{$pkg}, @_) };
		906	$retval ||= $retval_;
		907
		908	if ($@) {
		909	$TERM->ungrab; # better to lose the grab than the session
		910	warn $@;
		911	}
		912	}
		913
		914	verbose 11, "$HOOKNAME[$htype] returning <$retval>"
		915	if $verbosity >= 11;
185	0	916	}
		917
		918	if ($htype == 1) { # DESTROY
		919	# clear package objects
		920	%$_ = () for values %{ $TERM->{_pkg} };
		921
		922	# clear package
		923	%$TERM = ();
		924	}
		925
		926	$retval
186	}	927	}
		928
		929	sub SET_COLOR($$$) {
		930	SET_BGCOLOR (SET_FGCOLOR ($_[0], $_[1]), $_[2])
		931	}
		932
		933	# urxvt::term::extension
		934
		935	package urxvt::term::extension;
		936
		937	sub enable {
		938	my ($self, %hook) = @_;
		939	my $pkg = $self->{_pkg};
		940
		941	while (my ($name, $cb) = each %hook) {
		942	my $htype = $HOOKTYPE{uc $name};
		943	defined $htype
		944	or Carp::croak "unsupported hook type '$name'";
		945
		946	$self->set_should_invoke ($htype, +1)
		947	unless exists $self->{term}{_hook}[$htype]{$pkg};
		948
		949	$self->{term}{_hook}[$htype]{$pkg} = $cb;
		950	}
		951	}
		952
		953	sub disable {
		954	my ($self, @hook) = @_;
		955	my $pkg = $self->{_pkg};
		956
		957	for my $name (@hook) {
		958	my $htype = $HOOKTYPE{uc $name};
		959	defined $htype
		960	or Carp::croak "unsupported hook type '$name'";
		961
		962	$self->set_should_invoke ($htype, -1)
		963	if delete $self->{term}{_hook}[$htype]{$pkg};
		964	}
		965	}
		966
		967	our $AUTOLOAD;
		968
		969	sub AUTOLOAD {
		970	$AUTOLOAD =~ /:([^:]+)$/
		971	or die "FATAL: \$AUTOLOAD '$AUTOLOAD' unparsable";
		972
		973	eval qq{
		974	sub $AUTOLOAD {
		975	my \$proxy = shift;
		976	\$proxy->{term}->$1 (\@_)
		977	}
		978	1
		979	} or die "FATAL: unable to compile method forwarder: $@";
		980
		981	goto &$AUTOLOAD;
		982	}
		983
		984	sub DESTROY {
		985	# nop
		986	}
		987
		988	# urxvt::destroy_hook
		989
		990	sub urxvt::destroy_hook::DESTROY {
		991	${$_[0]}->();
		992	}
		993
		994	sub urxvt::destroy_hook(&) {
		995	bless \shift, urxvt::destroy_hook::
		996	}
		997
		998	package urxvt::anyevent;
		999
		1000	=head2 The C<urxvt::anyevent> Class
		1001
		1002	The sole purpose of this class is to deliver an interface to the
		1003	C<AnyEvent> module - any module using it will work inside urxvt without
		1004	further programming. The only exception is that you cannot wait on
		1005	condition variables, but non-blocking condvar use is ok. What this means
		1006	is that you cannot use blocking APIs, but the non-blocking variant should
		1007	work.
		1008
		1009	=cut
		1010
		1011	our $VERSION = 1;
		1012
		1013	$INC{"urxvt/anyevent.pm"} = 1; # mark us as there
		1014	push @AnyEvent::REGISTRY, [urxvt => urxvt::anyevent::];
		1015
		1016	sub timer {
		1017	my ($class, %arg) = @_;
		1018
		1019	my $cb = $arg{cb};
		1020
		1021	urxvt::timer
		1022	->new
		1023	->start (urxvt::NOW + $arg{after})
		1024	->cb (sub {
		1025	$_[0]->stop; # need to cancel manually
		1026	$cb->();
		1027	})
		1028	}
		1029
		1030	sub io {
		1031	my ($class, %arg) = @_;
		1032
		1033	my $cb = $arg{cb};
		1034
		1035	bless [$arg{fh}, urxvt::iow
		1036	->new
		1037	->fd (fileno $arg{fh})
		1038	->events (($arg{poll} =~ /r/ ? 1 : 0)
		1039	| ($arg{poll} =~ /w/ ? 2 : 0))
		1040	->start
		1041	->cb (sub {
		1042	$cb->(($_[1] & 1 ? 'r' : '')
		1043	. ($_[1] & 2 ? 'w' : ''));
		1044	})],
		1045	urxvt::anyevent::
		1046	}
		1047
		1048	sub DESTROY {
		1049	$_[0][1]->stop;
		1050	}
		1051
		1052	sub condvar {
		1053	bless \my $flag, urxvt::anyevent::condvar::
		1054	}
		1055
		1056	sub urxvt::anyevent::condvar::broadcast {
		1057	${$_[0]}++;
		1058	}
		1059
		1060	sub urxvt::anyevent::condvar::wait {
		1061	unless (${$_[0]}) {
		1062	Carp::croak "AnyEvent->condvar blocking wait unsupported in urxvt, use a non-blocking API";
		1063	}
		1064	}
		1065
		1066	package urxvt::term;
		1067
		1068	=head2 The C<urxvt::term> Class
		1069
		1070	=over 4
		1071
		1072	=cut
187		1073
188	# find on_xxx subs in the package and register them	1074	# find on_xxx subs in the package and register them
189	# as hooks	1075	# as hooks
190	sub register_package($) {	1076	sub register_package {
191	my ($pkg) = @_;	1077	my ($self, $pkg, $argv) = @_;
192		1078
		1079	no strict 'refs';
		1080
		1081	urxvt::verbose 6, "register package $pkg to $self";
		1082
		1083	@{"$pkg\::ISA"} = urxvt::term::extension::;
		1084
		1085	my $proxy = bless {
		1086	_pkg => $pkg,
		1087	argv => $argv,
		1088	}, $pkg;
		1089	Scalar::Util::weaken ($proxy->{term} = $self);
		1090
		1091	$self->{_pkg}{$pkg} = $proxy;
		1092
193	for my $hook (0.. $#HOOKNAME) {	1093	for my $name (@HOOKNAME) {
194	my $name = $HOOKNAME[$hook];
195
196	my $ref = $pkg->can ("on_" . lc $name)	1094	if (my $ref = $pkg->can ("on_" . lc $name)) {
197	or next;	1095	$proxy->enable ($name => $ref);
198		1096	}
199	$invoke_cb[$hook]{$ref*1} = $ref;
200	set_should_invoke $hook, 1;
201	}	1097	}
202	}	1098	}
203		1099
204	my $script_pkg = "script0000";	1100	=item $term = new urxvt::term $envhashref, $rxvtname, [arg...]
205	my %script_pkg;
206		1101
207	# load a single script into its own package, once only	1102	Creates a new terminal, very similar as if you had started it with system
208	sub load_script($) {	1103	C<$rxvtname, arg...>. C<$envhashref> must be a reference to a C<%ENV>-like
209	my ($path) = @_;	1104	hash which defines the environment of the new terminal.
210		1105
211	$script_pkg{$path} ||= do {	1106	Croaks (and probably outputs an error message) if the new instance
212	my $pkg = $script_pkg++;	1107	couldn't be created. Returns C<undef> if the new instance didn't
213	verbose 3, "loading script '$path' into package '$pkg'";	1108	initialise perl, and the terminal object otherwise. The C<init> and
		1109	C<start> hooks will be called before this call returns, and are free to
		1110	refer to global data (which is race free).
214		1111
215	open my $fh, "<:raw", $path	1112	=cut
216	or die "$path: $!";
217		1113
218	eval "package $pkg; use strict; use utf8;\n"	1114	sub new {
219	. "#line 1 \"$path\"\n"	1115	my ($class, $env, @args) = @_;
220	. do { local $/; <$fh> }
221	or die "$path: $@";
222		1116
223	register_package $pkg;	1117	$env or Carp::croak "environment hash missing in call to urxvt::term->new";
		1118	@args or Carp::croak "name argument missing in call to urxvt::term->new";
224		1119
225	$pkg	1120	_new ([ map "$_=$env->{$_}", keys %$env ], \@args);
226	};
227	}	1121	}
228		1122
229	load_script $_ for grep -f $_, <$LIBDIR/perl-ext/*>;	1123	=item $term->destroy
230		1124
		1125	Destroy the terminal object (close the window, free resources
		1126	etc.). Please note that @@RXVT_NAME@@ will not exit as long as any event
		1127	watchers (timers, io watchers) are still active.
231		1128
232	=back	1129	=item $term->exec_async ($cmd[, @args])
233		1130
234	=head2 The C<urxvt::term> Class	1131	Works like the combination of the C<fork>/C<exec> builtins, which executes
		1132	("starts") programs in the background. This function takes care of setting
		1133	the user environment before exec'ing the command (e.g. C<PATH>) and should
		1134	be preferred over explicit calls to C<exec> or C<system>.
235		1135
236	=over 4	1136	Returns the pid of the subprocess or C<undef> on error.
		1137
		1138	=cut
		1139
		1140	sub exec_async {
		1141	my $self = shift;
		1142
		1143	my $pid = fork;
		1144
		1145	return $pid
		1146	if !defined $pid or $pid;
		1147
		1148	%ENV = %{ $self->env };
		1149
		1150	exec @_;
		1151	urxvt::_exit 255;
		1152	}
		1153
		1154	=item $isset = $term->option ($optval[, $set])
		1155
		1156	Returns true if the option specified by C<$optval> is enabled, and
		1157	optionally change it. All option values are stored by name in the hash
		1158	C<%urxvt::OPTION>. Options not enabled in this binary are not in the hash.
		1159
		1160	Here is a a likely non-exhaustive list of option names, please see the
		1161	source file F</src/optinc.h> to see the actual list:
		1162
		1163	borderLess console cursorBlink cursorUnderline hold iconic insecure
		1164	intensityStyles jumpScroll loginShell mapAlert meta8 mouseWheelScrollPage
		1165	override-redirect pastableTabs pointerBlank reverseVideo scrollBar
		1166	scrollBar_floating scrollBar_right scrollTtyKeypress scrollTtyOutput
		1167	scrollWithBuffer secondaryScreen secondaryScroll skipBuiltinGlyphs
		1168	transparent tripleclickwords utmpInhibit visualBell
		1169
		1170	=item $value = $term->resource ($name[, $newval])
		1171
		1172	Returns the current resource value associated with a given name and
		1173	optionally sets a new value. Setting values is most useful in the C<init>
		1174	hook. Unset resources are returned and accepted as C<undef>.
		1175
		1176	The new value must be properly encoded to a suitable character encoding
		1177	before passing it to this method. Similarly, the returned value may need
		1178	to be converted from the used encoding to text.
		1179
		1180	Resource names are as defined in F<src/rsinc.h>. Colours can be specified
		1181	as resource names of the form C<< color+<index> >>, e.g. C<color+5>. (will
		1182	likely change).
		1183
		1184	Please note that resource strings will currently only be freed when the
		1185	terminal is destroyed, so changing options frequently will eat memory.
		1186
		1187	Here is a a likely non-exhaustive list of resource names, not all of which
		1188	are supported in every build, please see the source file F</src/rsinc.h>
		1189	to see the actual list:
		1190
		1191	answerbackstring backgroundPixmap backspace_key boldFont boldItalicFont
		1192	borderLess color cursorBlink cursorUnderline cutchars delete_key
		1193	display_name embed ext_bwidth fade font geometry hold iconName
		1194	imFont imLocale inputMethod insecure int_bwidth intensityStyles
		1195	italicFont jumpScroll lineSpace loginShell mapAlert meta8 modifier
		1196	mouseWheelScrollPage name override_redirect pastableTabs path perl_eval
		1197	perl_ext_1 perl_ext_2 perl_lib pointerBlank pointerBlankDelay
		1198	preeditType print_pipe pty_fd reverseVideo saveLines scrollBar
		1199	scrollBar_align scrollBar_floating scrollBar_right scrollBar_thickness
		1200	scrollTtyKeypress scrollTtyOutput scrollWithBuffer scrollstyle
		1201	secondaryScreen secondaryScroll selectstyle shade term_name title
		1202	transient_for transparent transparent_all tripleclickwords utmpInhibit
		1203	visualBell
		1204
		1205	=cut
		1206
		1207	sub resource($$;$) {
		1208	my ($self, $name) = (shift, shift);
		1209	unshift @_, $self, $name, ($name =~ s/\s*\+\s*(\d+)$// ? $1 : 0);
		1210	&urxvt::term::_resource
		1211	}
		1212
		1213	=item $value = $term->x_resource ($pattern)
		1214
		1215	Returns the X-Resource for the given pattern, excluding the program or
		1216	class name, i.e. C<< $term->x_resource ("boldFont") >> should return the
		1217	same value as used by this instance of rxvt-unicode. Returns C<undef> if no
		1218	resource with that pattern exists.
		1219
		1220	This method should only be called during the C<on_start> hook, as there is
		1221	only one resource database per display, and later invocations might return
		1222	the wrong resources.
		1223
		1224	=item $success = $term->parse_keysym ($keysym_spec, $command_string)
		1225
		1226	Adds a keymap translation exactly as specified via a resource. See the
		1227	C<keysym> resource in the @@RXVT_NAME@@(1) manpage.
		1228
		1229	=item $rend = $term->rstyle ([$new_rstyle])
		1230
		1231	Return and optionally change the current rendition. Text that is output by
		1232	the terminal application will use this style.
		1233
		1234	=item ($row, $col) = $term->screen_cur ([$row, $col])
		1235
		1236	Return the current coordinates of the text cursor position and optionally
		1237	set it (which is usually bad as applications don't expect that).
237		1238
238	=item ($row, $col) = $term->selection_mark ([$row, $col])	1239	=item ($row, $col) = $term->selection_mark ([$row, $col])
239		1240
240	=item ($row, $col) = $term->selection_beg ([$row, $col])	1241	=item ($row, $col) = $term->selection_beg ([$row, $col])
241		1242
242	=item ($row, $col) = $term->selection_end ([$row, $col])	1243	=item ($row, $col) = $term->selection_end ([$row, $col])
243		1244
244	Return the current values of the selection mark, begin or end positions,	1245	Return the current values of the selection mark, begin or end positions,
245	and optionally set them to new values.	1246	and optionally set them to new values.
246		1247
		1248	=item $term->selection_make ($eventtime[, $rectangular])
		1249
		1250	Tries to make a selection as set by C<selection_beg> and
		1251	C<selection_end>. If C<$rectangular> is true (default: false), a
		1252	rectangular selection will be made. This is the prefered function to make
		1253	a selection.
		1254
247	=item $success = $term->selection_grab ($eventtime)	1255	=item $success = $term->selection_grab ($eventtime)
248		1256
249	Try to request the primary selection from the server (for example, as set	1257	Try to request the primary selection text from the server (for example, as
250	by the next method).	1258	set by the next method). No visual feedback will be given. This function
		1259	is mostly useful from within C<on_sel_grab> hooks.
251		1260
252	=item $oldtext = $term->selection ([$newtext])	1261	=item $oldtext = $term->selection ([$newtext])
253		1262
254	Return the current selection text and optionally replace it by C<$newtext>.	1263	Return the current selection text and optionally replace it by C<$newtext>.
255		1264
256	=item $term->scr_overlay ($x, $y, $text)	1265	=item $term->overlay_simple ($x, $y, $text)
257		1266
258	Create a simple multi-line overlay box. See the next method for details.	1267	Create a simple multi-line overlay box. See the next method for details.
259		1268
260	=cut	1269	=cut
261		1270
262	sub urxvt::term::scr_overlay {	1271	sub overlay_simple {
263	my ($self, $x, $y, $text) = @_;	1272	my ($self, $x, $y, $text) = @_;
264		1273
265	my @lines = split /\n/, $text;	1274	my @lines = split /\n/, $text;
266		1275
267	my $w = 0;	1276	my $w = List::Util::max map $self->strwidth ($_), @lines;
268	for (map urxvt::wcswidth $_, @lines) {	1277
269	$w = $_ if $w < $_;	1278	my $overlay = $self->overlay ($x, $y, $w, scalar @lines);
		1279	$overlay->set (0, $_, $lines[$_]) for 0.. $#lines;
		1280
		1281	$overlay
		1282	}
		1283
		1284	=item $term->overlay ($x, $y, $width, $height[, $rstyle[, $border]])
		1285
		1286	Create a new (empty) overlay at the given position with the given
		1287	width/height. C<$rstyle> defines the initial rendition style
		1288	(default: C<OVERLAY_RSTYLE>).
		1289
		1290	If C<$border> is C<2> (default), then a decorative border will be put
		1291	around the box.
		1292
		1293	If either C<$x> or C<$y> is negative, then this is counted from the
		1294	right/bottom side, respectively.
		1295
		1296	This method returns an urxvt::overlay object. The overlay will be visible
		1297	as long as the perl object is referenced.
		1298
		1299	The methods currently supported on C<urxvt::overlay> objects are:
		1300
		1301	=over 4
		1302
		1303	=item $overlay->set ($x, $y, $text, $rend)
		1304
		1305	Similar to C<< $term->ROW_t >> and C<< $term->ROW_r >> in that it puts
		1306	text in rxvt-unicode's special encoding and an array of rendition values
		1307	at a specific position inside the overlay.
		1308
		1309	=item $overlay->hide
		1310
		1311	If visible, hide the overlay, but do not destroy it.
		1312
		1313	=item $overlay->show
		1314
		1315	If hidden, display the overlay again.
		1316
		1317	=back
		1318
		1319	=item $popup = $term->popup ($event)
		1320
		1321	Creates a new C<urxvt::popup> object that implements a popup menu. The
		1322	C<$event> I<must> be the event causing the menu to pop up (a button event,
		1323	currently).
		1324
		1325	=cut
		1326
		1327	sub popup {
		1328	my ($self, $event) = @_;
		1329
		1330	$self->grab ($event->{time}, 1)
		1331	or return;
		1332
		1333	my $popup = bless {
		1334	term => $self,
		1335	event => $event,
		1336	}, urxvt::popup::;
		1337
		1338	Scalar::Util::weaken $popup->{term};
		1339
		1340	$self->{_destroy}{$popup} = urxvt::destroy_hook { $popup->{popup}->destroy };
		1341	Scalar::Util::weaken $self->{_destroy}{$popup};
		1342
		1343	$popup
		1344	}
		1345
		1346	=item $cellwidth = $term->strwidth ($string)
		1347
		1348	Returns the number of screen-cells this string would need. Correctly
		1349	accounts for wide and combining characters.
		1350
		1351	=item $octets = $term->locale_encode ($string)
		1352
		1353	Convert the given text string into the corresponding locale encoding.
		1354
		1355	=item $string = $term->locale_decode ($octets)
		1356
		1357	Convert the given locale-encoded octets into a perl string.
		1358
		1359	=item $term->scr_xor_span ($beg_row, $beg_col, $end_row, $end_col[, $rstyle])
		1360
		1361	XORs the rendition values in the given span with the provided value
		1362	(default: C<RS_RVid>), which I<MUST NOT> contain font styles. Useful in
		1363	refresh hooks to provide effects similar to the selection.
		1364
		1365	=item $term->scr_xor_rect ($beg_row, $beg_col, $end_row, $end_col[, $rstyle1[, $rstyle2]])
		1366
		1367	Similar to C<scr_xor_span>, but xors a rectangle instead. Trailing
		1368	whitespace will additionally be xored with the C<$rstyle2>, which defaults
		1369	to C<RS_RVid | RS_Uline>, which removes reverse video again and underlines
		1370	it instead. Both styles I<MUST NOT> contain font styles.
		1371
		1372	=item $term->scr_bell
		1373
		1374	Ring the bell!
		1375
		1376	=item $term->scr_add_lines ($string)
		1377
		1378	Write the given text string to the screen, as if output by the application
		1379	running inside the terminal. It may not contain command sequences (escape
		1380	codes), but is free to use line feeds, carriage returns and tabs. The
		1381	string is a normal text string, not in locale-dependent encoding.
		1382
		1383	Normally its not a good idea to use this function, as programs might be
		1384	confused by changes in cursor position or scrolling. Its useful inside a
		1385	C<on_add_lines> hook, though.
		1386
		1387	=item $term->scr_change_screen ($screen)
		1388
		1389	Switch to given screen - 0 primary, 1 secondary.
		1390
		1391	=item $term->cmd_parse ($octets)
		1392
		1393	Similar to C<scr_add_lines>, but the argument must be in the
		1394	locale-specific encoding of the terminal and can contain command sequences
		1395	(escape codes) that will be interpreted.
		1396
		1397	=item $term->tt_write ($octets)
		1398
		1399	Write the octets given in C<$data> to the tty (i.e. as program input). To
		1400	pass characters instead of octets, you should convert your strings first
		1401	to the locale-specific encoding using C<< $term->locale_encode >>.
		1402
		1403	=item $old_events = $term->pty_ev_events ([$new_events])
		1404
		1405	Replaces the event mask of the pty watcher by the given event mask. Can
		1406	be used to suppress input and output handling to the pty/tty. See the
		1407	description of C<< urxvt::timer->events >>. Make sure to always restore
		1408	the previous value.
		1409
		1410	=item $fd = $term->pty_fd
		1411
		1412	Returns the master file descriptor for the pty in use, or C<-1> if no pty
		1413	is used.
		1414
		1415	=item $windowid = $term->parent
		1416
		1417	Return the window id of the toplevel window.
		1418
		1419	=item $windowid = $term->vt
		1420
		1421	Return the window id of the terminal window.
		1422
		1423	=item $term->vt_emask_add ($x_event_mask)
		1424
		1425	Adds the specified events to the vt event mask. Useful e.g. when you want
		1426	to receive pointer events all the times:
		1427
		1428	$term->vt_emask_add (urxvt::PointerMotionMask);
		1429
		1430	=item $term->focus_in
		1431
		1432	=item $term->focus_out
		1433
		1434	=item $term->key_press ($state, $keycode[, $time])
		1435
		1436	=item $term->key_release ($state, $keycode[, $time])
		1437
		1438	Deliver various fake events to to terminal.
		1439
		1440	=item $window_width = $term->width
		1441
		1442	=item $window_height = $term->height
		1443
		1444	=item $font_width = $term->fwidth
		1445
		1446	=item $font_height = $term->fheight
		1447
		1448	=item $font_ascent = $term->fbase
		1449
		1450	=item $terminal_rows = $term->nrow
		1451
		1452	=item $terminal_columns = $term->ncol
		1453
		1454	=item $has_focus = $term->focus
		1455
		1456	=item $is_mapped = $term->mapped
		1457
		1458	=item $max_scrollback = $term->saveLines
		1459
		1460	=item $nrow_plus_saveLines = $term->total_rows
		1461
		1462	=item $topmost_scrollback_row = $term->top_row
		1463
		1464	Return various integers describing terminal characteristics.
		1465
		1466	=item $x_display = $term->display_id
		1467
		1468	Return the DISPLAY used by rxvt-unicode.
		1469
		1470	=item $lc_ctype = $term->locale
		1471
		1472	Returns the LC_CTYPE category string used by this rxvt-unicode.
		1473
		1474	=item $env = $term->env
		1475
		1476	Returns a copy of the environment in effect for the terminal as a hashref
		1477	similar to C<\%ENV>.
		1478
		1479	=cut
		1480
		1481	sub env {
		1482	if (my $env = $_[0]->_env) {
		1483	+{ map /^([^=]+)(?:=(.*))?$/s && ($1 => $2), @$env }
		1484	} else {
		1485	+{ %ENV }
270	}	1486	}
271
272	$self->scr_overlay_new ($x, $y, $w, scalar @lines);
273	$self->scr_overlay_set (0, $_, $lines[$_]) for 0.. $#lines;
274	}	1487	}
275		1488
276	=item $term->scr_overlay_new ($x, $y, $width, $height)	1489	=item $modifiermask = $term->ModLevel3Mask
277		1490
278	Create a new (empty) overlay at the given position with the given	1491	=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		1492
283	=item $term->scr_overlay_off	1493	=item $modifiermask = $term->ModNumLockMask
284		1494
285	Switch the overlay off again.	1495	Return the modifier masks corresponding to the "ISO Level 3 Shift" (often
		1496	AltGr), the meta key (often Alt) and the num lock key, if applicable.
286		1497
287	=item $term->scr_overlay_set_char ($x, $y, $char, $rend = OVERLAY_RSTYLE)	1498	=item $screen = $term->current_screen
288		1499
289	Put a single character (specified numerically) at the given overlay	1500	Returns the currently displayed screen (0 primary, 1 secondary).
290	position.
291		1501
292	=item $term->scr_overlay_set ($x, $y, $text)	1502	=item $cursor_is_hidden = $term->hidden_cursor
293		1503
294	Write a string at the given position into the overlay.	1504	Returns wether the cursor is currently hidden or not.
		1505
		1506	=item $view_start = $term->view_start ([$newvalue])
		1507
		1508	Returns the row number of the topmost displayed line. Maximum value is
		1509	C<0>, which displays the normal terminal contents. Lower values scroll
		1510	this many lines into the scrollback buffer.
		1511
		1512	=item $term->want_refresh
		1513
		1514	Requests a screen refresh. At the next opportunity, rxvt-unicode will
		1515	compare the on-screen display with its stored representation. If they
		1516	differ, it redraws the differences.
		1517
		1518	Used after changing terminal contents to display them.
		1519
		1520	=item $text = $term->ROW_t ($row_number[, $new_text[, $start_col]])
		1521
		1522	Returns the text of the entire row with number C<$row_number>. Row C<0>
		1523	is the topmost terminal line, row C<< $term->$ncol-1 >> is the bottommost
		1524	terminal line. The scrollback buffer starts at line C<-1> and extends to
		1525	line C<< -$term->nsaved >>. Nothing will be returned if a nonexistent line
		1526	is requested.
		1527
		1528	If C<$new_text> is specified, it will replace characters in the current
		1529	line, starting at column C<$start_col> (default C<0>), which is useful
		1530	to replace only parts of a line. The font index in the rendition will
		1531	automatically be updated.
		1532
		1533	C<$text> is in a special encoding: tabs and wide characters that use more
		1534	than one cell when displayed are padded with C<$urxvt::NOCHAR> (chr 65535)
		1535	characters. Characters with combining characters and other characters that
		1536	do not fit into the normal tetx encoding will be replaced with characters
		1537	in the private use area.
		1538
		1539	You have to obey this encoding when changing text. The advantage is
		1540	that C<substr> and similar functions work on screen cells and not on
		1541	characters.
		1542
		1543	The methods C<< $term->special_encode >> and C<< $term->special_decode >>
		1544	can be used to convert normal strings into this encoding and vice versa.
		1545
		1546	=item $rend = $term->ROW_r ($row_number[, $new_rend[, $start_col]])
		1547
		1548	Like C<< $term->ROW_t >>, but returns an arrayref with rendition
		1549	bitsets. Rendition bitsets contain information about colour, font, font
		1550	styles and similar information. See also C<< $term->ROW_t >>.
		1551
		1552	When setting rendition, the font mask will be ignored.
		1553
		1554	See the section on RENDITION, above.
		1555
		1556	=item $length = $term->ROW_l ($row_number[, $new_length])
		1557
		1558	Returns the number of screen cells that are in use ("the line
		1559	length"). Unlike the urxvt core, this returns C<< $term->ncol >> if the
		1560	line is joined with the following one.
		1561
		1562	=item $bool = $term->is_longer ($row_number)
		1563
		1564	Returns true if the row is part of a multiple-row logical "line" (i.e.
		1565	joined with the following row), which means all characters are in use
		1566	and it is continued on the next row (and possibly a continuation of the
		1567	previous row(s)).
		1568
		1569	=item $line = $term->line ($row_number)
		1570
		1571	Create and return a new C<urxvt::line> object that stores information
		1572	about the logical line that row C<$row_number> is part of. It supports the
		1573	following methods:
		1574
		1575	=over 4
		1576
		1577	=item $text = $line->t ([$new_text])
		1578
		1579	Returns or replaces the full text of the line, similar to C<ROW_t>
		1580
		1581	=item $rend = $line->r ([$new_rend])
		1582
		1583	Returns or replaces the full rendition array of the line, similar to C<ROW_r>
		1584
		1585	=item $length = $line->l
		1586
		1587	Returns the length of the line in cells, similar to C<ROW_l>.
		1588
		1589	=item $rownum = $line->beg
		1590
		1591	=item $rownum = $line->end
		1592
		1593	Return the row number of the first/last row of the line, respectively.
		1594
		1595	=item $offset = $line->offset_of ($row, $col)
		1596
		1597	Returns the character offset of the given row|col pair within the logical
		1598	line. Works for rows outside the line, too, and returns corresponding
		1599	offsets outside the string.
		1600
		1601	=item ($row, $col) = $line->coord_of ($offset)
		1602
		1603	Translates a string offset into terminal coordinates again.
295		1604
296	=back	1605	=back
		1606
		1607	=cut
		1608
		1609	sub line {
		1610	my ($self, $row) = @_;
		1611
		1612	my $maxrow = $self->nrow - 1;
		1613
		1614	my ($beg, $end) = ($row, $row);
		1615
		1616	--$beg while $self->ROW_is_longer ($beg - 1);
		1617	++$end while $self->ROW_is_longer ($end) && $end < $maxrow;
		1618
		1619	bless {
		1620	term => $self,
		1621	beg => $beg,
		1622	end => $end,
		1623	ncol => $self->ncol,
		1624	len => ($end - $beg) * $self->ncol + $self->ROW_l ($end),
		1625	}, urxvt::line::
		1626	}
		1627
		1628	sub urxvt::line::t {
		1629	my ($self) = @_;
		1630
		1631	if (@_ > 1)
		1632	{
		1633	$self->{term}->ROW_t ($_, $_[1], 0, ($_ - $self->{beg}) * $self->{ncol}, $self->{ncol})
		1634	for $self->{beg} .. $self->{end};
		1635	}
		1636
		1637	defined wantarray &&
		1638	substr +(join "", map $self->{term}->ROW_t ($_), $self->{beg} .. $self->{end}),
		1639	0, $self->{len}
		1640	}
		1641
		1642	sub urxvt::line::r {
		1643	my ($self) = @_;
		1644
		1645	if (@_ > 1)
		1646	{
		1647	$self->{term}->ROW_r ($_, $_[1], 0, ($_ - $self->{beg}) * $self->{ncol}, $self->{ncol})
		1648	for $self->{beg} .. $self->{end};
		1649	}
		1650
		1651	if (defined wantarray) {
		1652	my $rend = [
		1653	map @{ $self->{term}->ROW_r ($_) }, $self->{beg} .. $self->{end}
		1654	];
		1655	$#$rend = $self->{len} - 1;
		1656	return $rend;
		1657	}
		1658
		1659	()
		1660	}
		1661
		1662	sub urxvt::line::beg { $_[0]{beg} }
		1663	sub urxvt::line::end { $_[0]{end} }
		1664	sub urxvt::line::l { $_[0]{len} }
		1665
		1666	sub urxvt::line::offset_of {
		1667	my ($self, $row, $col) = @_;
		1668
		1669	($row - $self->{beg}) * $self->{ncol} + $col
		1670	}
		1671
		1672	sub urxvt::line::coord_of {
		1673	my ($self, $offset) = @_;
		1674
		1675	use integer;
		1676
		1677	(
		1678	$offset / $self->{ncol} + $self->{beg},
		1679	$offset % $self->{ncol}
		1680	)
		1681	}
		1682
		1683	=item $text = $term->special_encode $string
		1684
		1685	Converts a perl string into the special encoding used by rxvt-unicode,
		1686	where one character corresponds to one screen cell. See
		1687	C<< $term->ROW_t >> for details.
		1688
		1689	=item $string = $term->special_decode $text
		1690
		1691	Converts rxvt-unicodes text reprsentation into a perl string. See
		1692	C<< $term->ROW_t >> for details.
		1693
		1694	=item $success = $term->grab_button ($button, $modifiermask[, $window = $term->vt])
		1695
		1696	=item $term->ungrab_button ($button, $modifiermask[, $window = $term->vt])
		1697
		1698	Register/unregister a synchronous button grab. See the XGrabButton
		1699	manpage.
		1700
		1701	=item $success = $term->grab ($eventtime[, $sync])
		1702
		1703	Calls XGrabPointer and XGrabKeyboard in asynchronous (default) or
		1704	synchronous (C<$sync> is true). Also remembers the grab timestampe.
		1705
		1706	=item $term->allow_events_async
		1707
		1708	Calls XAllowEvents with AsyncBoth for the most recent grab.
		1709
		1710	=item $term->allow_events_sync
		1711
		1712	Calls XAllowEvents with SyncBoth for the most recent grab.
		1713
		1714	=item $term->allow_events_replay
		1715
		1716	Calls XAllowEvents with both ReplayPointer and ReplayKeyboard for the most
		1717	recent grab.
		1718
		1719	=item $term->ungrab
		1720
		1721	Calls XUngrab for the most recent grab. Is called automatically on
		1722	evaluation errors, as it is better to lose the grab in the error case as
		1723	the session.
		1724
		1725	=item $atom = $term->XInternAtom ($atom_name[, $only_if_exists])
		1726
		1727	=item $atom_name = $term->XGetAtomName ($atom)
		1728
		1729	=item @atoms = $term->XListProperties ($window)
		1730
		1731	=item ($type,$format,$octets) = $term->XGetWindowProperty ($window, $property)
		1732
		1733	=item $term->XChangeWindowProperty ($window, $property, $type, $format, $octets)
		1734
		1735	=item $term->XDeleteProperty ($window, $property)
		1736
		1737	=item $window = $term->DefaultRootWindow
		1738
		1739	=item $term->XReparentWindow ($window, $parent, [$x, $y])
		1740
		1741	=item $term->XMapWindow ($window)
		1742
		1743	=item $term->XUnmapWindow ($window)
		1744
		1745	=item $term->XMoveResizeWindow ($window, $x, $y, $width, $height)
		1746
		1747	=item ($x, $y, $child_window) = $term->XTranslateCoordinates ($src, $dst, $x, $y)
		1748
		1749	=item $term->XChangeInput ($window, $add_events[, $del_events])
		1750
		1751	Various X or X-related functions. The C<$term> object only serves as
		1752	the source of the display, otherwise those functions map more-or-less
		1753	directory onto the X functions of the same name.
		1754
		1755	=back
		1756
		1757	=cut
		1758
		1759	package urxvt::popup;
		1760
		1761	=head2 The C<urxvt::popup> Class
		1762
		1763	=over 4
		1764
		1765	=cut
		1766
		1767	sub add_item {
		1768	my ($self, $item) = @_;
		1769
		1770	$item->{rend}{normal} = "\x1b[0;30;47m" unless exists $item->{rend}{normal};
		1771	$item->{rend}{hover} = "\x1b[0;30;46m" unless exists $item->{rend}{hover};
		1772	$item->{rend}{active} = "\x1b[m" unless exists $item->{rend}{active};
		1773
		1774	$item->{render} ||= sub { $_[0]{text} };
		1775
		1776	push @{ $self->{item} }, $item;
		1777	}
		1778
		1779	=item $popup->add_title ($title)
		1780
		1781	Adds a non-clickable title to the popup.
		1782
		1783	=cut
		1784
		1785	sub add_title {
		1786	my ($self, $title) = @_;
		1787
		1788	$self->add_item ({
		1789	rend => { normal => "\x1b[38;5;11;44m", hover => "\x1b[38;5;11;44m", active => "\x1b[38;5;11;44m" },
		1790	text => $title,
		1791	activate => sub { },
		1792	});
		1793	}
		1794
		1795	=item $popup->add_separator ([$sepchr])
		1796
		1797	Creates a separator, optionally using the character given as C<$sepchr>.
		1798
		1799	=cut
		1800
		1801	sub add_separator {
		1802	my ($self, $sep) = @_;
		1803
		1804	$sep ||= "=";
		1805
		1806	$self->add_item ({
		1807	rend => { normal => "\x1b[0;30;47m", hover => "\x1b[0;30;47m", active => "\x1b[0;30;47m" },
		1808	text => "",
		1809	render => sub { $sep x $self->{term}->ncol },
		1810	activate => sub { },
		1811	});
		1812	}
		1813
		1814	=item $popup->add_button ($text, $cb)
		1815
		1816	Adds a clickable button to the popup. C<$cb> is called whenever it is
		1817	selected.
		1818
		1819	=cut
		1820
		1821	sub add_button {
		1822	my ($self, $text, $cb) = @_;
		1823
		1824	$self->add_item ({ type => "button", text => $text, activate => $cb});
		1825	}
		1826
		1827	=item $popup->add_toggle ($text, $initial_value, $cb)
		1828
		1829	Adds a toggle/checkbox item to the popup. The callback gets called
		1830	whenever it gets toggled, with a boolean indicating its new value as its
		1831	first argument.
		1832
		1833	=cut
		1834
		1835	sub add_toggle {
		1836	my ($self, $text, $value, $cb) = @_;
		1837
		1838	my $item; $item = {
		1839	type => "button",
		1840	text => " $text",
		1841	value => $value,
		1842	render => sub { ($_[0]{value} ? "* " : " ") . $text },
		1843	activate => sub { $cb->($_[1]{value} = !$_[1]{value}); },
		1844	};
		1845
		1846	$self->add_item ($item);
		1847	}
		1848
		1849	=item $popup->show
		1850
		1851	Displays the popup (which is initially hidden).
		1852
		1853	=cut
		1854
		1855	sub show {
		1856	my ($self) = @_;
		1857
		1858	local $urxvt::popup::self = $self;
		1859
		1860	my $env = $self->{term}->env;
		1861	# we can't hope to reproduce the locale algorithm, so nuke LC_ALL and set LC_CTYPE.
		1862	delete $env->{LC_ALL};
		1863	$env->{LC_CTYPE} = $self->{term}->locale;
		1864
		1865	urxvt::term->new ($env, "popup",
		1866	"--perl-lib" => "", "--perl-ext-common" => "",
		1867	"-pty-fd" => -1, "-sl" => 0,
		1868	"-b" => 1, "-bd" => "grey80", "-bl", "-override-redirect",
		1869	"--transient-for" => $self->{term}->parent,
		1870	"-display" => $self->{term}->display_id,
		1871	"-pe" => "urxvt-popup")
		1872	or die "unable to create popup window\n";
		1873	}
		1874
		1875	sub DESTROY {
		1876	my ($self) = @_;
		1877
		1878	delete $self->{term}{_destroy}{$self};
		1879	$self->{term}->ungrab;
		1880	}
		1881
		1882	=back
		1883
		1884	=cut
		1885
		1886	package urxvt::watcher;
		1887
		1888	@urxvt::timer::ISA = __PACKAGE__;
		1889	@urxvt::iow::ISA = __PACKAGE__;
		1890	@urxvt::pw::ISA = __PACKAGE__;
		1891	@urxvt::iw::ISA = __PACKAGE__;
297		1892
298	=head2 The C<urxvt::timer> Class	1893	=head2 The C<urxvt::timer> Class
299		1894
300	This class implements timer watchers/events. Time is represented as a	1895	This class implements timer watchers/events. Time is represented as a
301	fractional number of seconds since the epoch. Example:	1896	fractional number of seconds since the epoch. Example:
302		1897
303	# create a digital clock display in upper right corner	1898	$term->{overlay} = $term->overlay (-1, 0, 8, 1, urxvt::OVERLAY_RSTYLE, 0);
304	$term->{timer} = urxvt::timer	1899	$term->{timer} = urxvt::timer
305	->new	1900	->new
306	->start (urxvt::NOW)	1901	->interval (1)
307	->cb (sub {	1902	->cb (sub {
308	my ($timer) = @_;
309	my $time = $timer->at;
310	$timer->start ($time + 1);
311	$self->scr_overlay (-1, 0,	1903	$term->{overlay}->set (0, 0,
312	POSIX::strftime "%H:%M:%S", localtime $time);	1904	sprintf "%2d:%02d:%02d", (localtime urxvt::NOW)[2,1,0]);
313	});	1905	});
314		1906
315	=over 4	1907	=over 4
316		1908
317	=item $timer = new urxvt::timer	1909	=item $timer = new urxvt::timer
318		1910
319	Create a new timer object in stopped state.	1911	Create a new timer object in started state. It is scheduled to fire
		1912	immediately.
320		1913
321	=item $timer = $timer->cb (sub { my ($timer) = @_; ... })	1914	=item $timer = $timer->cb (sub { my ($timer) = @_; ... })
322		1915
323	Set the callback to be called when the timer triggers.	1916	Set the callback to be called when the timer triggers.
324		1917
…		…
328		1921
329	=item $timer = $timer->set ($tstamp)	1922	=item $timer = $timer->set ($tstamp)
330		1923
331	Set the time the event is generated to $tstamp.	1924	Set the time the event is generated to $tstamp.
332		1925
		1926	=item $timer = $timer->interval ($interval)
		1927
		1928	Normally (and when C<$interval> is C<0>), the timer will automatically
		1929	stop after it has fired once. If C<$interval> is non-zero, then the timer
		1930	is automatically rescheduled at the given intervals.
		1931
333	=item $timer = $timer->start	1932	=item $timer = $timer->start
334		1933
335	Start the timer.	1934	Start the timer.
336		1935
337	=item $timer = $timer->start ($tstamp)	1936	=item $timer = $timer->start ($tstamp)
338		1937
339	Set the event trigger time to C<$tstamp> and start the timer.	1938	Set the event trigger time to C<$tstamp> and start the timer.
		1939
		1940	=item $timer = $timer->after ($delay)
		1941
		1942	Like C<start>, but sets the expiry timer to c<urxvt::NOW + $delay>.
340		1943
341	=item $timer = $timer->stop	1944	=item $timer = $timer->stop
342		1945
343	Stop the timer.	1946	Stop the timer.
344		1947
…		…
350		1953
351	$term->{socket} = ...	1954	$term->{socket} = ...
352	$term->{iow} = urxvt::iow	1955	$term->{iow} = urxvt::iow
353	->new	1956	->new
354	->fd (fileno $term->{socket})	1957	->fd (fileno $term->{socket})
355	->events (1) # wait for read data	1958	->events (urxvt::EVENT_READ)
356	->start	1959	->start
357	->cb (sub {	1960	->cb (sub {
358	my ($iow, $revents) = @_;	1961	my ($iow, $revents) = @_;
359	# $revents must be 1 here, no need to check	1962	# $revents must be 1 here, no need to check
360	sysread $term->{socket}, my $buf, 8192	1963	sysread $term->{socket}, my $buf, 8192
…		…
377		1980
378	Set the filedescriptor (not handle) to watch.	1981	Set the filedescriptor (not handle) to watch.
379		1982
380	=item $iow = $iow->events ($eventmask)	1983	=item $iow = $iow->events ($eventmask)
381		1984
382	Set the event mask to watch. Bit #0 (value C<1>) enables watching for read	1985	Set the event mask to watch. The only allowed values are
383	data, Bit #1 (value C<2>) enables watching for write data.	1986	C<urxvt::EVENT_READ> and C<urxvt::EVENT_WRITE>, which might be ORed
		1987	together, or C<urxvt::EVENT_NONE>.
384		1988
385	=item $iow = $iow->start	1989	=item $iow = $iow->start
386		1990
387	Start watching for requested events on the given handle.	1991	Start watching for requested events on the given handle.
388		1992
389	=item $iow = $iow->stop	1993	=item $iow = $iow->stop
390		1994
391	Stop watching for events on the given filehandle.	1995	Stop watching for events on the given filehandle.
		1996
		1997	=back
		1998
		1999	=head2 The C<urxvt::iw> Class
		2000
		2001	This class implements idle watchers, that get called automatically when
		2002	the process is idle. They should return as fast as possible, after doing
		2003	some useful work.
		2004
		2005	=over 4
		2006
		2007	=item $iw = new urxvt::iw
		2008
		2009	Create a new idle watcher object in stopped state.
		2010
		2011	=item $iw = $iw->cb (sub { my ($iw) = @_; ... })
		2012
		2013	Set the callback to be called when the watcher triggers.
		2014
		2015	=item $timer = $timer->start
		2016
		2017	Start the watcher.
		2018
		2019	=item $timer = $timer->stop
		2020
		2021	Stop the watcher.
		2022
		2023	=back
		2024
		2025	=head2 The C<urxvt::pw> Class
		2026
		2027	This class implements process watchers. They create an event whenever a
		2028	process exits, after which they stop automatically.
		2029
		2030	my $pid = fork;
		2031	...
		2032	$term->{pw} = urxvt::pw
		2033	->new
		2034	->start ($pid)
		2035	->cb (sub {
		2036	my ($pw, $exit_status) = @_;
		2037	...
		2038	});
		2039
		2040	=over 4
		2041
		2042	=item $pw = new urxvt::pw
		2043
		2044	Create a new process watcher in stopped state.
		2045
		2046	=item $pw = $pw->cb (sub { my ($pw, $exit_status) = @_; ... })
		2047
		2048	Set the callback to be called when the timer triggers.
		2049
		2050	=item $pw = $timer->start ($pid)
		2051
		2052	Tells the wqtcher to start watching for process C<$pid>.
		2053
		2054	=item $pw = $pw->stop
		2055
		2056	Stop the watcher.
		2057
		2058	=back
		2059
		2060	=head1 ENVIRONMENT
		2061
		2062	=head2 URXVT_PERL_VERBOSITY
		2063
		2064	This variable controls the verbosity level of the perl extension. Higher
		2065	numbers indicate more verbose output.
		2066
		2067	=over 4
		2068
		2069	=item == 0 - fatal messages
		2070
		2071	=item >= 3 - script loading and management
		2072
		2073	=item >=10 - all called hooks
		2074
		2075	=item >=11 - hook reutrn values
392		2076
393	=back	2077	=back
394		2078
395	=head1 AUTHOR	2079	=head1 AUTHOR
396		2080

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