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Revision 1.170 by root, Tue Sep 23 07:03:13 2008 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	Every time 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	You can disable the embedded perl interpreter by setting both "perl-ext"
		32	and "perl-ext-common" resources to the empty string.
		33
		34	=head1 PREPACKAGED EXTENSIONS
		35
		36	This section describes the extensions delivered with this release. You can
		37	find them in F<@@RXVT_LIBDIR@@/urxvt/perl/>.
		38
		39	You can activate them like this:
		40
		41	@@RXVT_NAME@@ -pe <extensionname>
		42
		43	Or by adding them to the resource for extensions loaded by default:
		44
		45	URxvt.perl-ext-common: default,selection-autotransform
		46
		47	=over 4
		48
		49	=item selection (enabled by default)
		50
		51	(More) intelligent selection. This extension tries to be more intelligent
		52	when the user extends selections (double-click and further clicks). Right
		53	now, it tries to select words, urls and complete shell-quoted
		54	arguments, which is very convenient, too, if your F<ls> supports
		55	C<--quoting-style=shell>.
		56
		57	A double-click usually selects the word under the cursor, further clicks
		58	will enlarge the selection.
		59
		60	The selection works by trying to match a number of regexes and displaying
		61	them in increasing order of length. You can add your own regexes by
		62	specifying resources of the form:
		63
		64	URxvt.selection.pattern-0: perl-regex
		65	URxvt.selection.pattern-1: perl-regex
		66	...
		67
		68	The index number (0, 1...) must not have any holes, and each regex must
		69	contain at least one pair of capturing parentheses, which will be used for
		70	the match. For example, the following adds a regex that matches everything
		71	between two vertical bars:
		72
		73	URxvt.selection.pattern-0: \\|([^|]+)\\|
		74
		75	Another example: Programs I use often output "absolute path: " at the
		76	beginning of a line when they process multiple files. The following
		77	pattern matches the filename (note, there is a single space at the very
		78	end):
		79
		80	URxvt.selection.pattern-0: ^(/[^:]+):\
		81
		82	You can look at the source of the selection extension to see more
		83	interesting uses, such as parsing a line from beginning to end.
		84
		85	This extension also offers following bindable keyboard commands:
		86
		87	=over 4
		88
		89	=item rot13
		90
		91	Rot-13 the selection when activated. Used via keyboard trigger:
		92
		93	URxvt.keysym.C-M-r: perl:selection:rot13
		94
		95	=back
		96
		97	=item option-popup (enabled by default)
		98
		99	Binds a popup menu to Ctrl-Button2 that lets you toggle (some) options at
		100	runtime.
		101
		102	Other extensions can extend this popup menu by pushing a code reference
		103	onto C<@{ $term->{option_popup_hook} }>, which gets called whenever the
		104	popup is being displayed.
		105
		106	Its sole argument is the popup menu, which can be modified. It should
		107	either return nothing or a string, the initial boolean value and a code
		108	reference. The string will be used as button text and the code reference
		109	will be called when the toggle changes, with the new boolean value as
		110	first argument.
		111
		112	The following will add an entry C<myoption> that changes
		113	C<< $self->{myoption} >>:
		114
		115	push @{ $self->{term}{option_popup_hook} }, sub {
		116	("my option" => $myoption, sub { $self->{myoption} = $_[0] })
		117	};
		118
		119	=item selection-popup (enabled by default)
		120
		121	Binds a popup menu to Ctrl-Button3 that lets you convert the selection
		122	text into various other formats/action (such as uri unescaping, perl
		123	evaluation, web-browser starting etc.), depending on content.
		124
		125	Other extensions can extend this popup menu by pushing a code reference
		126	onto C<@{ $term->{selection_popup_hook} }>, which gets called whenever the
		127	popup is being displayed.
		128
		129	Its sole argument is the popup menu, which can be modified. The selection
		130	is in C<$_>, which can be used to decide whether to add something or not.
		131	It should either return nothing or a string and a code reference. The
		132	string will be used as button text and the code reference will be called
		133	when the button gets activated and should transform C<$_>.
		134
		135	The following will add an entry C<a to b> that transforms all C<a>s in
		136	the selection to C<b>s, but only if the selection currently contains any
		137	C<a>s:
		138
		139	push @{ $self->{term}{selection_popup_hook} }, sub {
		140	/a/ ? ("a to b" => sub { s/a/b/g }
		141	: ()
		142	};
		143
		144	=item searchable-scrollback<hotkey> (enabled by default)
		145
		146	Adds regex search functionality to the scrollback buffer, triggered
		147	by a hotkey (default: C<M-s>). While in search mode, normal terminal
		148	input/output is suspended and a regex is displayed at the bottom of the
		149	screen.
		150
		151	Inputting characters appends them to the regex and continues incremental
		152	search. C<BackSpace> removes a character from the regex, C<Up> and C<Down>
		153	search upwards/downwards in the scrollback buffer, C<End> jumps to the
		154	bottom. C<Escape> leaves search mode and returns to the point where search
		155	was started, while C<Enter> or C<Return> stay at the current position and
		156	additionally stores the first match in the current line into the primary
		157	selection if the C<Shift> modifier is active.
		158
		159	The regex defaults to "(?i)", resulting in a case-insensitive search. To
		160	get a case-sensitive search you can delete this prefix using C<BackSpace>
		161	or simply use an uppercase character which removes the "(?i)" prefix.
		162
		163	See L<perlre> for more info about perl regular expression syntax.
		164
		165	=item readline (enabled by default)
		166
		167	A support package that tries to make editing with readline easier. At
		168	the moment, it reacts to clicking shift-left mouse button by trying to
		169	move the text cursor to this position. It does so by generating as many
		170	cursor-left or cursor-right keypresses as required (this only works
		171	for programs that correctly support wide characters).
		172
		173	To avoid too many false positives, this is only done when:
		174
		175	=over 4
		176
		177	=item - the tty is in ICANON state.
		178
		179	=item - the text cursor is visible.
		180
		181	=item - the primary screen is currently being displayed.
		182
		183	=item - the mouse is on the same (multi-row-) line as the text cursor.
		184
		185	=back
		186
		187	The normal selection mechanism isn't disabled, so quick successive clicks
		188	might interfere with selection creation in harmless ways.
		189
		190	=item selection-autotransform
		191
		192	This selection allows you to do automatic transforms on a selection
		193	whenever a selection is made.
		194
		195	It works by specifying perl snippets (most useful is a single C<s///>
		196	operator) that modify C<$_> as resources:
		197
		198	URxvt.selection-autotransform.0: transform
		199	URxvt.selection-autotransform.1: transform
		200	...
		201
		202	For example, the following will transform selections of the form
		203	C<filename:number>, often seen in compiler messages, into C<vi +$filename
		204	$word>:
		205
		206	URxvt.selection-autotransform.0: s/^([^:[:space:]]+):(\\d+):?$/vi +$2 \\Q$1\\E\\x0d/
		207
		208	And this example matches the same,but replaces it with vi-commands you can
		209	paste directly into your (vi :) editor:
		210
		211	URxvt.selection-autotransform.0: s/^([^:[:space:]]+(\\d+):?$/:e \\Q$1\\E\\x0d:$2\\x0d/
		212
		213	Of course, this can be modified to suit your needs and your editor :)
		214
		215	To expand the example above to typical perl error messages ("XXX at
		216	FILENAME line YYY."), you need a slightly more elaborate solution:
		217
		218	URxvt.selection.pattern-0: ( at .*? line \\d+[,.])
		219	URxvt.selection-autotransform.0: s/^ at (.*?) line (\\d+)[,.]$/:e \\Q$1\E\\x0d:$2\\x0d/
		220
		221	The first line tells the selection code to treat the unchanging part of
		222	every error message as a selection pattern, and the second line transforms
		223	the message into vi commands to load the file.
		224
		225	=item tabbed
		226
		227	This transforms the terminal into a tabbar with additional terminals, that
		228	is, it implements what is commonly referred to as "tabbed terminal". The topmost line
		229	displays a "[NEW]" button, which, when clicked, will add a new tab, followed by one
		230	button per tab.
		231
		232	Clicking a button will activate that tab. Pressing B<Shift-Left> and
		233	B<Shift-Right> will switch to the tab left or right of the current one,
		234	while B<Shift-Down> creates a new tab.
		235
		236	The tabbar itself can be configured similarly to a normal terminal, but
		237	with a resource class of C<URxvt.tabbed>. In addition, it supports the
		238	following four resources (shown with defaults):
		239
		240	URxvt.tabbed.tabbar-fg: <colour-index, default 3>
		241	URxvt.tabbed.tabbar-bg: <colour-index, default 0>
		242	URxvt.tabbed.tab-fg: <colour-index, default 0>
		243	URxvt.tabbed.tab-bg: <colour-index, default 1>
		244
		245	See I<COLOR AND GRAPHICS> in the @@RXVT_NAME@@(1) manpage for valid
		246	indices.
		247
		248	=item matcher
		249
		250	Uses per-line display filtering (C<on_line_update>) to underline text
		251	matching a certain pattern and make it clickable. When clicked with the
		252	mouse button specified in the C<matcher.button> resource (default 2, or
		253	middle), the program specified in the C<matcher.launcher> resource
		254	(default, the C<urlLauncher> resource, C<sensible-browser>) will be started
		255	with the matched text as first argument. The default configuration is
		256	suitable for matching URLs and launching a web browser, like the
		257	former "mark-urls" extension.
		258
		259	The default pattern to match URLs can be overridden with the
		260	C<matcher.pattern.0> resource, and additional patterns can be specified
		261	with numbered patterns, in a manner similar to the "selection" extension.
		262	The launcher can also be overridden on a per-pattern basis.
		263
		264	It is possible to activate the most recently seen match from the keyboard.
		265	Simply bind a keysym to "perl:matcher" as seen in the example below.
		266
		267	Example configuration:
		268
		269	URxvt.perl-ext: default,matcher
		270	URxvt.urlLauncher: sensible-browser
		271	URxvt.keysym.C-Delete: perl:matcher
		272	URxvt.matcher.button: 1
		273	URxvt.matcher.pattern.1: \\bwww\\.[\\w-]+\\.[\\w./?&@#-]*[\\w/-]
		274	URxvt.matcher.pattern.2: \\B(/\\S+?):(\\d+)(?=:|$)
		275	URxvt.matcher.launcher.2: gvim +$2 $1
		276
		277	=item xim-onthespot
		278
		279	This (experimental) perl extension implements OnTheSpot editing. It does
		280	not work perfectly, and some input methods don't seem to work well with
		281	OnTheSpot editing in general, but it seems to work at least for SCIM and
		282	kinput2.
		283
		284	You enable it by specifying this extension and a preedit style of
		285	C<OnTheSpot>, i.e.:
		286
		287	@@RXVT_NAME@@ -pt OnTheSpot -pe xim-onthespot
		288
		289	=item kuake<hotkey>
		290
		291	A very primitive quake-console-like extension. It was inspired by a
		292	description of how the programs C<kuake> and C<yakuake> work: Whenever the
		293	user presses a global accelerator key (by default C<F10>), the terminal
		294	will show or hide itself. Another press of the accelerator key will hide
		295	or show it again.
		296
		297	Initially, the window will not be shown when using this extension.
		298
		299	This is useful if you need a single terminal that is not using any desktop
		300	space most of the time but is quickly available at the press of a key.
		301
		302	The accelerator key is grabbed regardless of any modifiers, so this
		303	extension will actually grab a physical key just for this function.
		304
		305	If you want a quake-like animation, tell your window manager to do so
		306	(fvwm can do it).
		307
		308	=item block-graphics-to-ascii
		309
		310	A not very useful example of filtering all text output to the terminal
		311	by replacing all line-drawing characters (U+2500 .. U+259F) by a
		312	similar-looking ascii character.
		313
		314	=item digital-clock
		315
		316	Displays a digital clock using the built-in overlay.
		317
		318	=item remote-clipboard
		319
		320	Somewhat of a misnomer, this extension adds two menu entries to the
		321	selection popup that allows one to run external commands to store the
		322	selection somewhere and fetch it again.
		323
		324	We use it to implement a "distributed selection mechanism", which just
		325	means that one command uploads the file to a remote server, and another
		326	reads it.
		327
		328	The commands can be set using the C<URxvt.remote-selection.store> and
		329	C<URxvt.remote-selection.fetch> resources. The first should read the
		330	selection to store from STDIN (always in UTF-8), the second should provide
		331	the selection data on STDOUT (also in UTF-8).
		332
		333	The defaults (which are likely useless to you) use rsh and cat:
		334
		335	URxvt.remote-selection.store: rsh ruth 'cat >/tmp/distributed-selection'
		336	URxvt.remote-selection.fetch: rsh ruth 'cat /tmp/distributed-selection'
		337
		338	=item selection-pastebin
		339
		340	This is a little rarely useful extension that Uploads the selection as
		341	textfile to a remote site (or does other things). (The implementation is
		342	not currently secure for use in a multiuser environment as it writes to
		343	F</tmp> directly.).
		344
		345	It listens to the C<selection-pastebin:remote-pastebin> keyboard command,
		346	i.e.
		347
		348	URxvt.keysym.C-M-e: perl:selection-pastebin:remote-pastebin
		349
		350	Pressing this combination runs a command with C<%> replaced by the name of
		351	the textfile. This command can be set via a resource:
		352
		353	URxvt.selection-pastebin.cmd: rsync -apP % ruth:/var/www/www.ta-sa.org/files/txt/.
		354
		355	And the default is likely not useful to anybody but the few people around
		356	here :)
		357
		358	The name of the textfile is the hex encoded md5 sum of the selection, so
		359	the same content should lead to the same filename.
		360
		361	After a successful upload the selection will be replaced by the text given
		362	in the C<selection-pastebin-url> resource (again, the % is the placeholder
		363	for the filename):
		364
		365	URxvt.selection-pastebin.url: http://www.ta-sa.org/files/txt/%
		366
		367	I<Note to xrdb users:> xrdb uses the C preprocessor, which might interpret
		368	the double C</> characters as comment start. Use C<\057\057> instead,
		369	which works regardless of wether xrdb is used to parse the resource file
		370	or not.
		371
		372	=item example-refresh-hooks
		373
		374	Displays a very simple digital clock in the upper right corner of the
		375	window. Illustrates overwriting the refresh callbacks to create your own
		376	overlays or changes.
		377
		378	=back
		379
		380	=head1 API DOCUMENTATION
		381
		382	=head2 General API Considerations
		383
		384	All objects (such as terminals, time watchers etc.) are typical
		385	reference-to-hash objects. The hash can be used to store anything you
		386	like. All members starting with an underscore (such as C<_ptr> or
		387	C<_hook>) are reserved for internal uses and B<MUST NOT> be accessed or
		388	modified).
		389
		390	When objects are destroyed on the C++ side, the perl object hashes are
		391	emptied, so its best to store related objects such as time watchers and
		392	the like inside the terminal object so they get destroyed as soon as the
		393	terminal is destroyed.
		394
		395	Argument names also often indicate the type of a parameter. Here are some
		396	hints on what they mean:
		397
		398	=over 4
		399
		400	=item $text
		401
		402	Rxvt-unicodes special way of encoding text, where one "unicode" character
		403	always represents one screen cell. See L<ROW_t> for a discussion of this format.
		404
		405	=item $string
		406
		407	A perl text string, with an emphasis on I<text>. It can store all unicode
		408	characters and is to be distinguished with text encoded in a specific
		409	encoding (often locale-specific) and binary data.
		410
		411	=item $octets
		412
		413	Either binary data or - more common - a text string encoded in a
		414	locale-specific way.
		415
		416	=back
		417
		418	=head2 Extension Objects
		419
		420	Every perl extension is a perl class. A separate perl object is created
		421	for each terminal, and each terminal has its own set of extenion objects,
		422	which are passed as the first parameter to hooks. So extensions can use
		423	their C<$self> object without having to think about clashes with other
		424	extensions or other terminals, with the exception of methods and members
		425	that begin with an underscore character C<_>: these are reserved for
		426	internal use.
		427
		428	Although it isn't a C<urxvt::term> object, you can call all methods of the
		429	C<urxvt::term> class on this object.
		430
		431	It has the following methods and data members:
		432
		433	=over 4
		434
		435	=item $urxvt_term = $self->{term}
		436
		437	Returns the C<urxvt::term> object associated with this instance of the
		438	extension. This member I<must not> be changed in any way.
		439
		440	=item $self->enable ($hook_name => $cb, [$hook_name => $cb..])
		441
		442	Dynamically enable the given hooks (named without the C<on_> prefix) for
		443	this extension, replacing any previous hook. This is useful when you want
		444	to overwrite time-critical hooks only temporarily.
		445
		446	=item $self->disable ($hook_name[, $hook_name..])
		447
		448	Dynamically disable the given hooks.
		449
		450	=back
		451
23	=head2 Hooks	452	=head2 Hooks
24		453
25	The following subroutines can be declared in loaded scripts, and will be called	454	The following subroutines can be declared in extension files, and will be
26	whenever the relevant event happens.	455	called whenever the relevant event happens.
27		456
28	All of them must return a boolean value. If it is true, then the event	457	The first argument passed to them is an extension object as described in
29	counts as being I<consumed>, and the invocation of other hooks is skipped,	458	the in the C<Extension Objects> section.
		459
		460	B<All> of these hooks must return a boolean value. If any of the called
		461	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.	462	relevant action might not be carried out by the C++ code.
31		463
32	When in doubt, return a false value (preferably C<()>).	464	I<< When in doubt, return a false value (preferably C<()>). >>
33		465
34	=over 4	466	=over 4
35		467
36	=item on_init $term	468	=item on_init $term
37		469
38	Called after a new terminal object has been initialized, but before	470	Called after a new terminal object has been initialized, but before
39	windows are created or the command gets run.	471	windows are created or the command gets run. Most methods are unsafe to
		472	call or deliver senseless data, as terminal size and other characteristics
		473	have not yet been determined. You can safely query and change resources
		474	and options, though. For many purposes the C<on_start> hook is a better
		475	place.
		476
		477	=item on_start $term
		478
		479	Called at the very end of initialisation of a new terminal, just before
		480	trying to map (display) the toplevel and returning to the main loop.
		481
		482	=item on_destroy $term
		483
		484	Called whenever something tries to destroy terminal, when the terminal is
		485	still fully functional (not for long, though).
40		486
41	=item on_reset $term	487	=item on_reset $term
42		488
43	Called after the screen is "reset" for any reason, such as resizing or	489	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	490	control sequences. Here is where you can react on changes to size-related
45	variables.	491	variables.
46		492
47	=item on_start $term	493	=item on_child_start $term, $pid
48		494
49	Called at the very end of initialisation of a new terminal, just before	495	Called just after the child process has been C<fork>ed.
50	returning to the mainloop.	496
		497	=item on_child_exit $term, $status
		498
		499	Called just after the child process has exited. C<$status> is the status
		500	from C<waitpid>.
51		501
52	=item on_sel_make $term, $eventtime	502	=item on_sel_make $term, $eventtime
53		503
54	Called whenever a selection has been made by the user, but before the	504	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	505	selection text is copied, so changes to the beginning, end or type of the
…		…
62		512
63	Called whenever a selection has been copied, but before the selection is	513	Called whenever a selection has been copied, but before the selection is
64	requested from the server. The selection text can be queried and changed	514	requested from the server. The selection text can be queried and changed
65	by calling C<< $term->selection >>.	515	by calling C<< $term->selection >>.
66		516
67	Returning a true value aborts selection grabbing. It will still be hilighted.	517	Returning a true value aborts selection grabbing. It will still be highlighted.
68		518
69	=item on_focus_in $term	519	=item on_sel_extend $term
70		520
71	Called whenever the window gets the keyboard focus, before urxvt does	521	Called whenever the user tries to extend the selection (e.g. with a double
72	focus in processing.	522	click) and is either supposed to return false (normal operation), or
		523	should extend the selection itself and return true to suppress the built-in
		524	processing. This can happen multiple times, as long as the callback
		525	returns true, it will be called on every further click by the user and is
		526	supposed to enlarge the selection more and more, if possible.
73		527
74	=item on_focus_out $term	528	See the F<selection> example extension.
75
76	Called wheneever the window loses keyboard focus, before urxvt does focus
77	out processing.
78		529
79	=item on_view_change $term, $offset	530	=item on_view_change $term, $offset
80		531
81	Called whenever the view offset changes, i..e the user or program	532	Called whenever the view offset changes, i.e. the user or program
82	scrolls. Offset C<0> means display the normal terminal, positive values	533	scrolls. Offset C<0> means display the normal terminal, positive values
83	show this many lines of scrollback.	534	show this many lines of scrollback.
84		535
85	=item on_scroll_back $term, $lines, $saved	536	=item on_scroll_back $term, $lines, $saved
86		537
…		…
90		541
91	It is called before lines are scrolled out (so rows 0 .. min ($lines - 1,	542	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	543	$nrow - 1) represent the lines to be scrolled out). C<$saved> is the total
93	number of lines that will be in the scrollback buffer.	544	number of lines that will be in the scrollback buffer.
94		545
95	=item on_tty_activity $term *NYI*	546	=item on_osc_seq $term, $op, $args
96		547
97	Called whenever the program(s) running in the urxvt window send output.	548	Called on every OSC sequence and can be used to suppress it or modify its
		549	behaviour. The default should be to return an empty list. A true value
		550	suppresses execution of the request completely. Make sure you don't get
		551	confused by recursive invocations when you output an osc sequence within
		552	this callback.
		553
		554	C<on_osc_seq_perl> should be used for new behaviour.
		555
		556	=item on_osc_seq_perl $term, $string
		557
		558	Called whenever the B<ESC ] 777 ; string ST> command sequence (OSC =
		559	operating system command) is processed. Cursor position and other state
		560	information is up-to-date when this happens. For interoperability, the
		561	string should start with the extension name and a colon, to distinguish
		562	it from commands for other extensions, and this might be enforced in the
		563	future.
		564
		565	Be careful not ever to trust (in a security sense) the data you receive,
		566	as its source can not easily be controlled (e-mail content, messages from
		567	other users on the same system etc.).
		568
		569	=item on_add_lines $term, $string
		570
		571	Called whenever text is about to be output, with the text as argument. You
		572	can filter/change and output the text yourself by returning a true value
		573	and calling C<< $term->scr_add_lines >> yourself. Please note that this
		574	might be very slow, however, as your hook is called for B<all> text being
		575	output.
		576
		577	=item on_tt_write $term, $octets
		578
		579	Called whenever some data is written to the tty/pty and can be used to
		580	suppress or filter tty input.
		581
		582	=item on_line_update $term, $row
		583
		584	Called whenever a line was updated or changed. Can be used to filter
		585	screen output (e.g. underline urls or other useless stuff). Only lines
		586	that are being shown will be filtered, and, due to performance reasons,
		587	not always immediately.
		588
		589	The row number is always the topmost row of the line if the line spans
		590	multiple rows.
		591
		592	Please note that, if you change the line, then the hook might get called
		593	later with the already-modified line (e.g. if unrelated parts change), so
		594	you cannot just toggle rendition bits, but only set them.
98		595
99	=item on_refresh_begin $term	596	=item on_refresh_begin $term
100		597
101	Called just before the screen gets redrawn. Can be used for overlay	598	Called just before the screen gets redrawn. Can be used for overlay
102	or similar effects by modify terminal contents in refresh_begin, and	599	or similar effects by modify terminal contents in refresh_begin, and
…		…
105		602
106	=item on_refresh_end $term	603	=item on_refresh_end $term
107		604
108	Called just after the screen gets redrawn. See C<on_refresh_begin>.	605	Called just after the screen gets redrawn. See C<on_refresh_begin>.
109		606
		607	=item on_user_command $term, $string
		608
		609	Called whenever a user-configured event is being activated (e.g. via
		610	a C<perl:string> action bound to a key, see description of the B<keysym>
		611	resource in the @@RXVT_NAME@@(1) manpage).
		612
		613	The event is simply the action string. This interface is assumed to change
		614	slightly in the future.
		615
		616	=item on_resize_all_windows $tern, $new_width, $new_height
		617
		618	Called just after the new window size has been calculated, but before
		619	windows are actually being resized or hints are being set. If this hook
		620	returns TRUE, setting of the window hints is being skipped.
		621
		622	=item on_x_event $term, $event
		623
		624	Called on every X event received on the vt window (and possibly other
		625	windows). Should only be used as a last resort. Most event structure
		626	members are not passed.
		627
		628	=item on_root_event $term, $event
		629
		630	Like C<on_x_event>, but is called for events on the root window.
		631
		632	=item on_focus_in $term
		633
		634	Called whenever the window gets the keyboard focus, before rxvt-unicode
		635	does focus in processing.
		636
		637	=item on_focus_out $term
		638
		639	Called whenever the window loses keyboard focus, before rxvt-unicode does
		640	focus out processing.
		641
		642	=item on_configure_notify $term, $event
		643
		644	=item on_property_notify $term, $event
		645
		646	=item on_key_press $term, $event, $keysym, $octets
		647
		648	=item on_key_release $term, $event, $keysym
		649
		650	=item on_button_press $term, $event
		651
		652	=item on_button_release $term, $event
		653
		654	=item on_motion_notify $term, $event
		655
		656	=item on_map_notify $term, $event
		657
		658	=item on_unmap_notify $term, $event
		659
		660	Called whenever the corresponding X event is received for the terminal If
		661	the hook returns true, then the even will be ignored by rxvt-unicode.
		662
		663	The event is a hash with most values as named by Xlib (see the XEvent
		664	manpage), with the additional members C<row> and C<col>, which are the
		665	(real, not screen-based) row and column under the mouse cursor.
		666
		667	C<on_key_press> additionally receives the string rxvt-unicode would
		668	output, if any, in locale-specific encoding.
		669
		670	subwindow.
		671
		672	=item on_client_message $term, $event
		673
		674	=item on_wm_protocols $term, $event
		675
		676	=item on_wm_delete_window $term, $event
		677
		678	Called when various types of ClientMessage events are received (all with
		679	format=32, WM_PROTOCOLS or WM_PROTOCOLS:WM_DELETE_WINDOW).
		680
		681	=back
		682
		683	=cut
		684
		685	package urxvt;
		686
		687	use utf8;
		688	use strict;
		689	use Carp ();
		690	use Scalar::Util ();
		691	use List::Util ();
		692
		693	our $VERSION = 1;
		694	our $TERM;
		695	our @TERM_INIT;
		696	our @TERM_EXT;
		697	our @HOOKNAME;
		698	our %HOOKTYPE = map +($HOOKNAME[$_] => $_), 0..$#HOOKNAME;
		699	our %OPTION;
		700
		701	our $LIBDIR;
		702	our $RESNAME;
		703	our $RESCLASS;
		704	our $RXVTNAME;
		705
		706	our $NOCHAR = chr 0xffff;
		707
		708	=head2 Variables in the C<urxvt> Package
		709
		710	=over 4
		711
		712	=item $urxvt::LIBDIR
		713
		714	The rxvt-unicode library directory, where, among other things, the perl
		715	modules and scripts are stored.
		716
		717	=item $urxvt::RESCLASS, $urxvt::RESCLASS
		718
		719	The resource class and name rxvt-unicode uses to look up X resources.
		720
		721	=item $urxvt::RXVTNAME
		722
		723	The basename of the installed binaries, usually C<urxvt>.
		724
		725	=item $urxvt::TERM
		726
		727	The current terminal. This variable stores the current C<urxvt::term>
		728	object, whenever a callback/hook is executing.
		729
		730	=item @urxvt::TERM_INIT
		731
		732	All code references in this array will be called as methods of the next newly
		733	created C<urxvt::term> object (during the C<on_init> phase). The array
		734	gets cleared before the code references that were in it are being executed,
		735	so references can push themselves onto it again if they so desire.
		736
		737	This complements to the perl-eval command line option, but gets executed
		738	first.
		739
		740	=item @urxvt::TERM_EXT
		741
		742	Works similar to C<@TERM_INIT>, but contains perl package/class names, which
		743	get registered as normal extensions after calling the hooks in C<@TERM_INIT>
		744	but before other extensions. Gets cleared just like C<@TERM_INIT>.
		745
110	=back	746	=back
111		747
112	=head2 Functions in the C<urxvt> Package	748	=head2 Functions in the C<urxvt> Package
113		749
114	=over 4	750	=over 4
…		…
119	costs! The only time this is acceptable is when the terminal process	755	costs! The only time this is acceptable is when the terminal process
120	starts up.	756	starts up.
121		757
122	=item urxvt::warn $string	758	=item urxvt::warn $string
123		759
124	Calls C<rxvt_warn> witht eh given string which should not include a	760	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	761	newline. The module also overwrites the C<warn> builtin with a function
126	that calls this function.	762	that calls this function.
127		763
128	Using this function has the advantage that its output ends up in the	764	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.	765	correct place, e.g. on stderr of the connecting urxvtc client.
130		766
131	=item $cellwidth = urxvt::wcswidth $string	767	Messages have a size limit of 1023 bytes currently.
132		768
133	Returns the number of screen-cells this string would need. Correctly	769	=item @terms = urxvt::termlist
134	accounts for wide and combining characters.	770
		771	Returns all urxvt::term objects that exist in this process, regardless of
		772	whether they are started, being destroyed etc., so be careful. Only term
		773	objects that have perl extensions attached will be returned (because there
		774	is no urxvt::term objet associated with others).
135		775
136	=item $time = urxvt::NOW	776	=item $time = urxvt::NOW
137		777
138	Returns the "current time" (as per the event loop).	778	Returns the "current time" (as per the event loop).
139		779
		780	=item urxvt::CurrentTime
		781
		782	=item urxvt::ShiftMask, LockMask, ControlMask, Mod1Mask, Mod2Mask,
		783	Mod3Mask, Mod4Mask, Mod5Mask, Button1Mask, Button2Mask, Button3Mask,
		784	Button4Mask, Button5Mask, AnyModifier
		785
		786	=item urxvt::NoEventMask, KeyPressMask, KeyReleaseMask,
		787	ButtonPressMask, ButtonReleaseMask, EnterWindowMask, LeaveWindowMask,
		788	PointerMotionMask, PointerMotionHintMask, Button1MotionMask, Button2MotionMask,
		789	Button3MotionMask, Button4MotionMask, Button5MotionMask, ButtonMotionMask,
		790	KeymapStateMask, ExposureMask, VisibilityChangeMask, StructureNotifyMask,
		791	ResizeRedirectMask, SubstructureNotifyMask, SubstructureRedirectMask,
		792	FocusChangeMask, PropertyChangeMask, ColormapChangeMask, OwnerGrabButtonMask
		793
		794	=item urxvt::KeyPress, KeyRelease, ButtonPress, ButtonRelease, MotionNotify,
		795	EnterNotify, LeaveNotify, FocusIn, FocusOut, KeymapNotify, Expose,
		796	GraphicsExpose, NoExpose, VisibilityNotify, CreateNotify, DestroyNotify,
		797	UnmapNotify, MapNotify, MapRequest, ReparentNotify, ConfigureNotify,
		798	ConfigureRequest, GravityNotify, ResizeRequest, CirculateNotify,
		799	CirculateRequest, PropertyNotify, SelectionClear, SelectionRequest,
		800	SelectionNotify, ColormapNotify, ClientMessage, MappingNotify
		801
		802	Various constants for use in X calls and event processing.
		803
		804	=back
		805
		806	=head2 RENDITION
		807
		808	Rendition bitsets contain information about colour, font, font styles and
		809	similar information for each screen cell.
		810
		811	The following "macros" deal with changes in rendition sets. You should
		812	never just create a bitset, you should always modify an existing one,
		813	as they contain important information required for correct operation of
		814	rxvt-unicode.
		815
		816	=over 4
		817
		818	=item $rend = urxvt::DEFAULT_RSTYLE
		819
		820	Returns the default rendition, as used when the terminal is starting up or
		821	being reset. Useful as a base to start when creating renditions.
		822
		823	=item $rend = urxvt::OVERLAY_RSTYLE
		824
		825	Return the rendition mask used for overlays by default.
		826
		827	=item $rendbit = urxvt::RS_Bold, RS_Italic, RS_Blink, RS_RVid, RS_Uline
		828
		829	Return the bit that enabled bold, italic, blink, reverse-video and
		830	underline, respectively. To enable such a style, just logically OR it into
		831	the bitset.
		832
		833	=item $foreground = urxvt::GET_BASEFG $rend
		834
		835	=item $background = urxvt::GET_BASEBG $rend
		836
		837	Return the foreground/background colour index, respectively.
		838
		839	=item $rend = urxvt::SET_FGCOLOR $rend, $new_colour
		840
		841	=item $rend = urxvt::SET_BGCOLOR $rend, $new_colour
		842
		843	=item $rend = urxvt::SET_COLOR $rend, $new_fg, $new_bg
		844
		845	Replace the foreground/background colour in the rendition mask with the
		846	specified one.
		847
		848	=item $value = urxvt::GET_CUSTOM $rend
		849
		850	Return the "custom" value: Every rendition has 5 bits for use by
		851	extensions. They can be set and changed as you like and are initially
		852	zero.
		853
		854	=item $rend = urxvt::SET_CUSTOM $rend, $new_value
		855
		856	Change the custom value.
		857
		858	=back
		859
140	=cut	860	=cut
141		861
142	package urxvt;
143
144	use strict;
145
146	our $term;
147	our @HOOKNAME;
148	our $LIBDIR;
149
150	BEGIN {	862	BEGIN {
151	urxvt->bootstrap;
152
153	# overwrite perl's warn	863	# overwrite perl's warn
154	*CORE::GLOBAL::warn = sub {	864	*CORE::GLOBAL::warn = sub {
155	my $msg = join "", @_;	865	my $msg = join "", @_;
156	$msg .= "\n"	866	$msg .= "\n"
157	unless $msg =~ /\n$/;	867	unless $msg =~ /\n$/;
158	urxvt::warn ($msg);	868	urxvt::warn ($msg);
159	};	869	};
160	}	870	}
161		871
		872	no warnings 'utf8';
		873
162	my $verbosity = $ENV{URXVT_PERL_VERBOSITY} || 10;	874	my $verbosity = $ENV{URXVT_PERL_VERBOSITY};
163		875
164	sub verbose {	876	sub verbose {
165	my ($level, $msg) = @_;	877	my ($level, $msg) = @_;
166	warn "$msg\n"; #d#	878	warn "$msg\n" if $level <= $verbosity;
167	}	879	}
168		880
169	my @invoke_cb;	881	my %extension_pkg;
		882
		883	# load a single script into its own package, once only
		884	sub extension_package($) {
		885	my ($path) = @_;
		886
		887	$extension_pkg{$path} ||= do {
		888	$path =~ /([^\/\\]+)$/;
		889	my $pkg = $1;
		890	$pkg =~ s/[^[:word:]]/_/g;
		891	$pkg = "urxvt::ext::$pkg";
		892
		893	verbose 3, "loading extension '$path' into package '$pkg'";
		894
		895	open my $fh, "<:raw", $path
		896	or die "$path: $!";
		897
		898	my $source =
		899	"package $pkg; use strict; use utf8; no warnings 'utf8';\n"
		900	. "#line 1 \"$path\"\n{\n"
		901	. (do { local $/; <$fh> })
		902	. "\n};\n1";
		903
		904	eval $source
		905	or die "$path: $@";
		906
		907	$pkg
		908	}
		909	}
		910
		911	our $retval; # return value for urxvt
170		912
171	# called by the rxvt core	913	# called by the rxvt core
172	sub invoke {	914	sub invoke {
173	local $term = shift;	915	local $TERM = shift;
174	my $htype = shift;	916	my $htype = shift;
175		917
176	my $cb = $invoke_cb[$htype];	918	if ($htype == 0) { # INIT
		919	my @dirs = ((split /:/, $TERM->resource ("perl_lib")), "$LIBDIR/perl");
177		920
178	verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $term, @_) . ")"	921	my %ext_arg;
179	if $verbosity >= 10;
180		922
181	while (my ($k, $v) = each %$cb) {	923	{
182	return 1 if $v->($term, @_);	924	my @init = @TERM_INIT;
		925	@TERM_INIT = ();
		926	$_->($TERM) for @init;
		927	my @pkg = @TERM_EXT;
		928	@TERM_EXT = ();
		929	$TERM->register_package ($_) for @pkg;
		930	}
		931
		932	for (grep $_, map { split /,/, $TERM->resource ("perl_ext_$_") } 1, 2) {
		933	if ($_ eq "default") {
		934	$ext_arg{$_} ||= [] for qw(selection option-popup selection-popup searchable-scrollback readline);
		935	} elsif (/^-(.*)$/) {
		936	delete $ext_arg{$1};
		937	} elsif (/^([^<]+)<(.*)>$/) {
		938	push @{ $ext_arg{$1} }, $2;
		939	} else {
		940	$ext_arg{$_} ||= [];
		941	}
		942	}
		943
		944	for my $ext (sort keys %ext_arg) {
		945	my @files = grep -f $_, map "$_/$ext", @dirs;
		946
		947	if (@files) {
		948	$TERM->register_package (extension_package $files[0], $ext_arg{$ext});
		949	} else {
		950	warn "perl extension '$ext' not found in perl library search path\n";
		951	}
		952	}
		953
		954	eval "#line 1 \"--perl-eval resource/argument\"\n" . $TERM->resource ("perl_eval");
		955	warn $@ if $@;
183	}	956	}
184		957
		958	$retval = undef;
		959
		960	if (my $cb = $TERM->{_hook}[$htype]) {
		961	verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $TERM, @_) . ")"
		962	if $verbosity >= 10;
		963
		964	for my $pkg (keys %$cb) {
		965	my $retval_ = eval { $cb->{$pkg}->($TERM->{_pkg}{$pkg}, @_) };
		966	$retval ||= $retval_;
		967
		968	if ($@) {
		969	$TERM->ungrab; # better to lose the grab than the session
		970	warn $@;
		971	}
		972	}
		973
		974	verbose 11, "$HOOKNAME[$htype] returning <$retval>"
		975	if $verbosity >= 11;
185	0	976	}
		977
		978	if ($htype == 1) { # DESTROY
		979	# clear package objects
		980	%$_ = () for values %{ $TERM->{_pkg} };
		981
		982	# clear package
		983	%$TERM = ();
		984	}
		985
		986	$retval
186	}	987	}
		988
		989	sub SET_COLOR($$$) {
		990	SET_BGCOLOR (SET_FGCOLOR ($_[0], $_[1]), $_[2])
		991	}
		992
		993	sub rend2mask {
		994	no strict 'refs';
		995	my ($str, $mask) = (@_, 0);
		996	my %color = ( fg => undef, bg => undef );
		997	my @failed;
		998	for my $spec ( split /\s+/, $str ) {
		999	if ( $spec =~ /^([fb]g)[_:-]?(\d+)/i ) {
		1000	$color{lc($1)} = $2;
		1001	} else {
		1002	my $neg = $spec =~ s/^[-^]//;
		1003	unless ( exists &{"RS_$spec"} ) {
		1004	push @failed, $spec;
		1005	next;
		1006	}
		1007	my $cur = &{"RS_$spec"};
		1008	if ( $neg ) {
		1009	$mask &= ~$cur;
		1010	} else {
		1011	$mask |= $cur;
		1012	}
		1013	}
		1014	}
		1015	($mask, @color{qw(fg bg)}, \@failed)
		1016	}
		1017
		1018	# urxvt::term::extension
		1019
		1020	package urxvt::term::extension;
		1021
		1022	sub enable {
		1023	my ($self, %hook) = @_;
		1024	my $pkg = $self->{_pkg};
		1025
		1026	while (my ($name, $cb) = each %hook) {
		1027	my $htype = $HOOKTYPE{uc $name};
		1028	defined $htype
		1029	or Carp::croak "unsupported hook type '$name'";
		1030
		1031	$self->set_should_invoke ($htype, +1)
		1032	unless exists $self->{term}{_hook}[$htype]{$pkg};
		1033
		1034	$self->{term}{_hook}[$htype]{$pkg} = $cb;
		1035	}
		1036	}
		1037
		1038	sub disable {
		1039	my ($self, @hook) = @_;
		1040	my $pkg = $self->{_pkg};
		1041
		1042	for my $name (@hook) {
		1043	my $htype = $HOOKTYPE{uc $name};
		1044	defined $htype
		1045	or Carp::croak "unsupported hook type '$name'";
		1046
		1047	$self->set_should_invoke ($htype, -1)
		1048	if delete $self->{term}{_hook}[$htype]{$pkg};
		1049	}
		1050	}
		1051
		1052	our $AUTOLOAD;
		1053
		1054	sub AUTOLOAD {
		1055	$AUTOLOAD =~ /:([^:]+)$/
		1056	or die "FATAL: \$AUTOLOAD '$AUTOLOAD' unparsable";
		1057
		1058	eval qq{
		1059	sub $AUTOLOAD {
		1060	my \$proxy = shift;
		1061	\$proxy->{term}->$1 (\@_)
		1062	}
		1063	1
		1064	} or die "FATAL: unable to compile method forwarder: $@";
		1065
		1066	goto &$AUTOLOAD;
		1067	}
		1068
		1069	sub DESTROY {
		1070	# nop
		1071	}
		1072
		1073	# urxvt::destroy_hook
		1074
		1075	sub urxvt::destroy_hook::DESTROY {
		1076	${$_[0]}->();
		1077	}
		1078
		1079	sub urxvt::destroy_hook(&) {
		1080	bless \shift, urxvt::destroy_hook::
		1081	}
		1082
		1083	package urxvt::anyevent;
		1084
		1085	=head2 The C<urxvt::anyevent> Class
		1086
		1087	The sole purpose of this class is to deliver an interface to the
		1088	C<AnyEvent> module - any module using it will work inside urxvt without
		1089	further programming. The only exception is that you cannot wait on
		1090	condition variables, but non-blocking condvar use is ok. What this means
		1091	is that you cannot use blocking APIs, but the non-blocking variant should
		1092	work.
		1093
		1094	=cut
		1095
		1096	our $VERSION = '3.4';
		1097
		1098	$INC{"urxvt/anyevent.pm"} = 1; # mark us as there
		1099	push @AnyEvent::REGISTRY, [urxvt => urxvt::anyevent::];
		1100
		1101	sub timer {
		1102	my ($class, %arg) = @_;
		1103
		1104	my $cb = $arg{cb};
		1105
		1106	urxvt::timer
		1107	->new
		1108	->start (urxvt::NOW + $arg{after})
		1109	->cb (sub {
		1110	$_[0]->stop; # need to cancel manually
		1111	$cb->();
		1112	})
		1113	}
		1114
		1115	sub io {
		1116	my ($class, %arg) = @_;
		1117
		1118	my $cb = $arg{cb};
		1119
		1120	bless [$arg{fh}, urxvt::iow
		1121	->new
		1122	->fd (fileno $arg{fh})
		1123	->events (($arg{poll} =~ /r/ ? 1 : 0)
		1124	| ($arg{poll} =~ /w/ ? 2 : 0))
		1125	->start
		1126	->cb (sub {
		1127	$cb->(($_[1] & 1 ? 'r' : '')
		1128	. ($_[1] & 2 ? 'w' : ''));
		1129	})],
		1130	urxvt::anyevent::
		1131	}
		1132
		1133	sub DESTROY {
		1134	$_[0][1]->stop;
		1135	}
		1136
		1137	sub one_event {
		1138	Carp::croak "AnyEvent->one_event blocking wait unsupported in urxvt, use a non-blocking API";
		1139	}
		1140
		1141	package urxvt::term;
		1142
		1143	=head2 The C<urxvt::term> Class
		1144
		1145	=over 4
		1146
		1147	=cut
187		1148
188	# find on_xxx subs in the package and register them	1149	# find on_xxx subs in the package and register them
189	# as hooks	1150	# as hooks
190	sub register_package($) {	1151	sub register_package {
191	my ($pkg) = @_;	1152	my ($self, $pkg, $argv) = @_;
192		1153
		1154	no strict 'refs';
		1155
		1156	urxvt::verbose 6, "register package $pkg to $self";
		1157
		1158	@{"$pkg\::ISA"} = urxvt::term::extension::;
		1159
		1160	my $proxy = bless {
		1161	_pkg => $pkg,
		1162	argv => $argv,
		1163	}, $pkg;
		1164	Scalar::Util::weaken ($proxy->{term} = $self);
		1165
		1166	$self->{_pkg}{$pkg} = $proxy;
		1167
193	for my $hook (0.. $#HOOKNAME) {	1168	for my $name (@HOOKNAME) {
194	my $name = $HOOKNAME[$hook];
195
196	my $ref = $pkg->can ("on_" . lc $name)	1169	if (my $ref = $pkg->can ("on_" . lc $name)) {
197	or next;	1170	$proxy->enable ($name => $ref);
198		1171	}
199	$invoke_cb[$hook]{$ref*1} = $ref;
200	set_should_invoke $hook, 1;
201	}	1172	}
202	}	1173	}
203		1174
204	my $script_pkg = "script0000";	1175	=item $term = new urxvt::term $envhashref, $rxvtname, [arg...]
205	my %script_pkg;
206		1176
207	# load a single script into its own package, once only	1177	Creates a new terminal, very similar as if you had started it with system
208	sub load_script($) {	1178	C<$rxvtname, arg...>. C<$envhashref> must be a reference to a C<%ENV>-like
209	my ($path) = @_;	1179	hash which defines the environment of the new terminal.
210		1180
211	$script_pkg{$path} ||= do {	1181	Croaks (and probably outputs an error message) if the new instance
212	my $pkg = $script_pkg++;	1182	couldn't be created. Returns C<undef> if the new instance didn't
213	verbose 3, "loading script '$path' into package '$pkg'";	1183	initialise perl, and the terminal object otherwise. The C<init> and
		1184	C<start> hooks will be called before this call returns, and are free to
		1185	refer to global data (which is race free).
214		1186
215	open my $fh, "<:raw", $path	1187	=cut
216	or die "$path: $!";
217		1188
218	eval "package $pkg; use strict; use utf8;\n"	1189	sub new {
219	. "#line 1 \"$path\"\n"	1190	my ($class, $env, @args) = @_;
220	. do { local $/; <$fh> }
221	or die "$path: $@";
222		1191
223	register_package $pkg;	1192	$env or Carp::croak "environment hash missing in call to urxvt::term->new";
		1193	@args or Carp::croak "name argument missing in call to urxvt::term->new";
224		1194
225	$pkg	1195	_new ([ map "$_=$env->{$_}", keys %$env ], \@args);
226	};
227	}	1196	}
228		1197
229	load_script $_ for grep -f $_, <$LIBDIR/perl-ext/*>;	1198	=item $term->destroy
230		1199
		1200	Destroy the terminal object (close the window, free resources
		1201	etc.). Please note that @@RXVT_NAME@@ will not exit as long as any event
		1202	watchers (timers, io watchers) are still active.
231		1203
232	=back	1204	=item $term->exec_async ($cmd[, @args])
233		1205
234	=head2 The C<urxvt::term> Class	1206	Works like the combination of the C<fork>/C<exec> builtins, which executes
		1207	("starts") programs in the background. This function takes care of setting
		1208	the user environment before exec'ing the command (e.g. C<PATH>) and should
		1209	be preferred over explicit calls to C<exec> or C<system>.
235		1210
236	=over 4	1211	Returns the pid of the subprocess or C<undef> on error.
		1212
		1213	=cut
		1214
		1215	sub exec_async {
		1216	my $self = shift;
		1217
		1218	my $pid = fork;
		1219
		1220	return $pid
		1221	if !defined $pid or $pid;
		1222
		1223	%ENV = %{ $self->env };
		1224
		1225	exec @_;
		1226	urxvt::_exit 255;
		1227	}
		1228
		1229	=item $isset = $term->option ($optval[, $set])
		1230
		1231	Returns true if the option specified by C<$optval> is enabled, and
		1232	optionally change it. All option values are stored by name in the hash
		1233	C<%urxvt::OPTION>. Options not enabled in this binary are not in the hash.
		1234
		1235	Here is a likely non-exhaustive list of option names, please see the
		1236	source file F</src/optinc.h> to see the actual list:
		1237
		1238	borderLess console cursorBlink cursorUnderline hold iconic insecure
		1239	intensityStyles jumpScroll loginShell mapAlert meta8 mouseWheelScrollPage
		1240	override-redirect pastableTabs pointerBlank reverseVideo scrollBar
		1241	scrollBar_floating scrollBar_right scrollTtyKeypress scrollTtyOutput
		1242	scrollWithBuffer secondaryScreen secondaryScroll skipBuiltinGlyphs
		1243	transparent tripleclickwords utmpInhibit visualBell
		1244
		1245	=item $value = $term->resource ($name[, $newval])
		1246
		1247	Returns the current resource value associated with a given name and
		1248	optionally sets a new value. Setting values is most useful in the C<init>
		1249	hook. Unset resources are returned and accepted as C<undef>.
		1250
		1251	The new value must be properly encoded to a suitable character encoding
		1252	before passing it to this method. Similarly, the returned value may need
		1253	to be converted from the used encoding to text.
		1254
		1255	Resource names are as defined in F<src/rsinc.h>. Colours can be specified
		1256	as resource names of the form C<< color+<index> >>, e.g. C<color+5>. (will
		1257	likely change).
		1258
		1259	Please note that resource strings will currently only be freed when the
		1260	terminal is destroyed, so changing options frequently will eat memory.
		1261
		1262	Here is a likely non-exhaustive list of resource names, not all of which
		1263	are supported in every build, please see the source file F</src/rsinc.h>
		1264	to see the actual list:
		1265
		1266	answerbackstring backgroundPixmap backspace_key boldFont boldItalicFont
		1267	borderLess chdir color cursorBlink cursorUnderline cutchars delete_key
		1268	display_name embed ext_bwidth fade font geometry hold iconName
		1269	imFont imLocale inputMethod insecure int_bwidth intensityStyles
		1270	italicFont jumpScroll lineSpace loginShell mapAlert meta8 modifier
		1271	mouseWheelScrollPage name override_redirect pastableTabs path perl_eval
		1272	perl_ext_1 perl_ext_2 perl_lib pointerBlank pointerBlankDelay
		1273	preeditType print_pipe pty_fd reverseVideo saveLines scrollBar
		1274	scrollBar_align scrollBar_floating scrollBar_right scrollBar_thickness
		1275	scrollTtyKeypress scrollTtyOutput scrollWithBuffer scrollstyle
		1276	secondaryScreen secondaryScroll shade term_name title
		1277	transient_for transparent transparent_all tripleclickwords utmpInhibit
		1278	visualBell
		1279
		1280	=cut
		1281
		1282	sub resource($$;$) {
		1283	my ($self, $name) = (shift, shift);
		1284	unshift @_, $self, $name, ($name =~ s/\s*\+\s*(\d+)$// ? $1 : 0);
		1285	goto &urxvt::term::_resource
		1286	}
		1287
		1288	=item $value = $term->x_resource ($pattern)
		1289
		1290	Returns the X-Resource for the given pattern, excluding the program or
		1291	class name, i.e. C<< $term->x_resource ("boldFont") >> should return the
		1292	same value as used by this instance of rxvt-unicode. Returns C<undef> if no
		1293	resource with that pattern exists.
		1294
		1295	This method should only be called during the C<on_start> hook, as there is
		1296	only one resource database per display, and later invocations might return
		1297	the wrong resources.
		1298
		1299	=item $success = $term->parse_keysym ($keysym_spec, $command_string)
		1300
		1301	Adds a keymap translation exactly as specified via a resource. See the
		1302	C<keysym> resource in the @@RXVT_NAME@@(1) manpage.
		1303
		1304	=item $rend = $term->rstyle ([$new_rstyle])
		1305
		1306	Return and optionally change the current rendition. Text that is output by
		1307	the terminal application will use this style.
		1308
		1309	=item ($row, $col) = $term->screen_cur ([$row, $col])
		1310
		1311	Return the current coordinates of the text cursor position and optionally
		1312	set it (which is usually bad as applications don't expect that).
237		1313
238	=item ($row, $col) = $term->selection_mark ([$row, $col])	1314	=item ($row, $col) = $term->selection_mark ([$row, $col])
239		1315
240	=item ($row, $col) = $term->selection_beg ([$row, $col])	1316	=item ($row, $col) = $term->selection_beg ([$row, $col])
241		1317
242	=item ($row, $col) = $term->selection_end ([$row, $col])	1318	=item ($row, $col) = $term->selection_end ([$row, $col])
243		1319
244	Return the current values of the selection mark, begin or end positions,	1320	Return the current values of the selection mark, begin or end positions,
245	and optionally set them to new values.	1321	and optionally set them to new values.
246		1322
		1323	=item $term->selection_make ($eventtime[, $rectangular])
		1324
		1325	Tries to make a selection as set by C<selection_beg> and
		1326	C<selection_end>. If C<$rectangular> is true (default: false), a
		1327	rectangular selection will be made. This is the prefered function to make
		1328	a selection.
		1329
247	=item $success = $term->selection_grab ($eventtime)	1330	=item $success = $term->selection_grab ($eventtime)
248		1331
249	Try to request the primary selection from the server (for example, as set	1332	Try to request the primary selection text from the server (for example, as
250	by the next method).	1333	set by the next method). No visual feedback will be given. This function
		1334	is mostly useful from within C<on_sel_grab> hooks.
251		1335
252	=item $oldtext = $term->selection ([$newtext])	1336	=item $oldtext = $term->selection ([$newtext])
253		1337
254	Return the current selection text and optionally replace it by C<$newtext>.	1338	Return the current selection text and optionally replace it by C<$newtext>.
255		1339
256	=item $term->scr_overlay ($x, $y, $text)	1340	=item $term->overlay_simple ($x, $y, $text)
257		1341
258	Create a simple multi-line overlay box. See the next method for details.	1342	Create a simple multi-line overlay box. See the next method for details.
259		1343
260	=cut	1344	=cut
261		1345
262	sub urxvt::term::scr_overlay {	1346	sub overlay_simple {
263	my ($self, $x, $y, $text) = @_;	1347	my ($self, $x, $y, $text) = @_;
264		1348
265	my @lines = split /\n/, $text;	1349	my @lines = split /\n/, $text;
266		1350
267	my $w = 0;	1351	my $w = List::Util::max map $self->strwidth ($_), @lines;
268	for (map urxvt::wcswidth $_, @lines) {	1352
269	$w = $_ if $w < $_;	1353	my $overlay = $self->overlay ($x, $y, $w, scalar @lines);
		1354	$overlay->set (0, $_, $lines[$_]) for 0.. $#lines;
		1355
		1356	$overlay
		1357	}
		1358
		1359	=item $term->overlay ($x, $y, $width, $height[, $rstyle[, $border]])
		1360
		1361	Create a new (empty) overlay at the given position with the given
		1362	width/height. C<$rstyle> defines the initial rendition style
		1363	(default: C<OVERLAY_RSTYLE>).
		1364
		1365	If C<$border> is C<2> (default), then a decorative border will be put
		1366	around the box.
		1367
		1368	If either C<$x> or C<$y> is negative, then this is counted from the
		1369	right/bottom side, respectively.
		1370
		1371	This method returns an urxvt::overlay object. The overlay will be visible
		1372	as long as the perl object is referenced.
		1373
		1374	The methods currently supported on C<urxvt::overlay> objects are:
		1375
		1376	=over 4
		1377
		1378	=item $overlay->set ($x, $y, $text, $rend)
		1379
		1380	Similar to C<< $term->ROW_t >> and C<< $term->ROW_r >> in that it puts
		1381	text in rxvt-unicode's special encoding and an array of rendition values
		1382	at a specific position inside the overlay.
		1383
		1384	=item $overlay->hide
		1385
		1386	If visible, hide the overlay, but do not destroy it.
		1387
		1388	=item $overlay->show
		1389
		1390	If hidden, display the overlay again.
		1391
		1392	=back
		1393
		1394	=item $popup = $term->popup ($event)
		1395
		1396	Creates a new C<urxvt::popup> object that implements a popup menu. The
		1397	C<$event> I<must> be the event causing the menu to pop up (a button event,
		1398	currently).
		1399
		1400	=cut
		1401
		1402	sub popup {
		1403	my ($self, $event) = @_;
		1404
		1405	$self->grab ($event->{time}, 1)
		1406	or return;
		1407
		1408	my $popup = bless {
		1409	term => $self,
		1410	event => $event,
		1411	}, urxvt::popup::;
		1412
		1413	Scalar::Util::weaken $popup->{term};
		1414
		1415	$self->{_destroy}{$popup} = urxvt::destroy_hook { $popup->{popup}->destroy };
		1416	Scalar::Util::weaken $self->{_destroy}{$popup};
		1417
		1418	$popup
		1419	}
		1420
		1421	=item $cellwidth = $term->strwidth ($string)
		1422
		1423	Returns the number of screen-cells this string would need. Correctly
		1424	accounts for wide and combining characters.
		1425
		1426	=item $octets = $term->locale_encode ($string)
		1427
		1428	Convert the given text string into the corresponding locale encoding.
		1429
		1430	=item $string = $term->locale_decode ($octets)
		1431
		1432	Convert the given locale-encoded octets into a perl string.
		1433
		1434	=item $term->scr_xor_span ($beg_row, $beg_col, $end_row, $end_col[, $rstyle])
		1435
		1436	XORs the rendition values in the given span with the provided value
		1437	(default: C<RS_RVid>), which I<MUST NOT> contain font styles. Useful in
		1438	refresh hooks to provide effects similar to the selection.
		1439
		1440	=item $term->scr_xor_rect ($beg_row, $beg_col, $end_row, $end_col[, $rstyle1[, $rstyle2]])
		1441
		1442	Similar to C<scr_xor_span>, but xors a rectangle instead. Trailing
		1443	whitespace will additionally be xored with the C<$rstyle2>, which defaults
		1444	to C<RS_RVid | RS_Uline>, which removes reverse video again and underlines
		1445	it instead. Both styles I<MUST NOT> contain font styles.
		1446
		1447	=item $term->scr_bell
		1448
		1449	Ring the bell!
		1450
		1451	=item $term->scr_add_lines ($string)
		1452
		1453	Write the given text string to the screen, as if output by the application
		1454	running inside the terminal. It may not contain command sequences (escape
		1455	codes), but is free to use line feeds, carriage returns and tabs. The
		1456	string is a normal text string, not in locale-dependent encoding.
		1457
		1458	Normally its not a good idea to use this function, as programs might be
		1459	confused by changes in cursor position or scrolling. Its useful inside a
		1460	C<on_add_lines> hook, though.
		1461
		1462	=item $term->scr_change_screen ($screen)
		1463
		1464	Switch to given screen - 0 primary, 1 secondary.
		1465
		1466	=item $term->cmd_parse ($octets)
		1467
		1468	Similar to C<scr_add_lines>, but the argument must be in the
		1469	locale-specific encoding of the terminal and can contain command sequences
		1470	(escape codes) that will be interpreted.
		1471
		1472	=item $term->tt_write ($octets)
		1473
		1474	Write the octets given in C<$data> to the tty (i.e. as program input). To
		1475	pass characters instead of octets, you should convert your strings first
		1476	to the locale-specific encoding using C<< $term->locale_encode >>.
		1477
		1478	=item $old_events = $term->pty_ev_events ([$new_events])
		1479
		1480	Replaces the event mask of the pty watcher by the given event mask. Can
		1481	be used to suppress input and output handling to the pty/tty. See the
		1482	description of C<< urxvt::timer->events >>. Make sure to always restore
		1483	the previous value.
		1484
		1485	=item $fd = $term->pty_fd
		1486
		1487	Returns the master file descriptor for the pty in use, or C<-1> if no pty
		1488	is used.
		1489
		1490	=item $windowid = $term->parent
		1491
		1492	Return the window id of the toplevel window.
		1493
		1494	=item $windowid = $term->vt
		1495
		1496	Return the window id of the terminal window.
		1497
		1498	=item $term->vt_emask_add ($x_event_mask)
		1499
		1500	Adds the specified events to the vt event mask. Useful e.g. when you want
		1501	to receive pointer events all the times:
		1502
		1503	$term->vt_emask_add (urxvt::PointerMotionMask);
		1504
		1505	=item $term->focus_in
		1506
		1507	=item $term->focus_out
		1508
		1509	=item $term->key_press ($state, $keycode[, $time])
		1510
		1511	=item $term->key_release ($state, $keycode[, $time])
		1512
		1513	Deliver various fake events to to terminal.
		1514
		1515	=item $window_width = $term->width
		1516
		1517	=item $window_height = $term->height
		1518
		1519	=item $font_width = $term->fwidth
		1520
		1521	=item $font_height = $term->fheight
		1522
		1523	=item $font_ascent = $term->fbase
		1524
		1525	=item $terminal_rows = $term->nrow
		1526
		1527	=item $terminal_columns = $term->ncol
		1528
		1529	=item $has_focus = $term->focus
		1530
		1531	=item $is_mapped = $term->mapped
		1532
		1533	=item $max_scrollback = $term->saveLines
		1534
		1535	=item $nrow_plus_saveLines = $term->total_rows
		1536
		1537	=item $topmost_scrollback_row = $term->top_row
		1538
		1539	Return various integers describing terminal characteristics.
		1540
		1541	=item $x_display = $term->display_id
		1542
		1543	Return the DISPLAY used by rxvt-unicode.
		1544
		1545	=item $lc_ctype = $term->locale
		1546
		1547	Returns the LC_CTYPE category string used by this rxvt-unicode.
		1548
		1549	=item $env = $term->env
		1550
		1551	Returns a copy of the environment in effect for the terminal as a hashref
		1552	similar to C<\%ENV>.
		1553
		1554	=item @envv = $term->envv
		1555
		1556	Returns the environment as array of strings of the form C<VAR=VALUE>.
		1557
		1558	=item @argv = $term->argv
		1559
		1560	Return the argument vector as this terminal, similar to @ARGV, but
		1561	includes the program name as first element.
		1562
		1563	=cut
		1564
		1565	sub env {
		1566	+{ map /^([^=]+)(?:=(.*))?$/s && ($1 => $2), $_[0]->envv }
		1567	}
		1568
		1569	=item $modifiermask = $term->ModLevel3Mask
		1570
		1571	=item $modifiermask = $term->ModMetaMask
		1572
		1573	=item $modifiermask = $term->ModNumLockMask
		1574
		1575	Return the modifier masks corresponding to the "ISO Level 3 Shift" (often
		1576	AltGr), the meta key (often Alt) and the num lock key, if applicable.
		1577
		1578	=item $screen = $term->current_screen
		1579
		1580	Returns the currently displayed screen (0 primary, 1 secondary).
		1581
		1582	=item $cursor_is_hidden = $term->hidden_cursor
		1583
		1584	Returns whether the cursor is currently hidden or not.
		1585
		1586	=item $view_start = $term->view_start ([$newvalue])
		1587
		1588	Returns the row number of the topmost displayed line. Maximum value is
		1589	C<0>, which displays the normal terminal contents. Lower values scroll
		1590	this many lines into the scrollback buffer.
		1591
		1592	=item $term->want_refresh
		1593
		1594	Requests a screen refresh. At the next opportunity, rxvt-unicode will
		1595	compare the on-screen display with its stored representation. If they
		1596	differ, it redraws the differences.
		1597
		1598	Used after changing terminal contents to display them.
		1599
		1600	=item $text = $term->ROW_t ($row_number[, $new_text[, $start_col]])
		1601
		1602	Returns the text of the entire row with number C<$row_number>. Row C<< $term->top_row >>
		1603	is the topmost terminal line, row C<< $term->nrow-1 >> is the bottommost
		1604	terminal line. Nothing will be returned if a nonexistent line
		1605	is requested.
		1606
		1607	If C<$new_text> is specified, it will replace characters in the current
		1608	line, starting at column C<$start_col> (default C<0>), which is useful
		1609	to replace only parts of a line. The font index in the rendition will
		1610	automatically be updated.
		1611
		1612	C<$text> is in a special encoding: tabs and wide characters that use more
		1613	than one cell when displayed are padded with C<$urxvt::NOCHAR> (chr 65535)
		1614	characters. Characters with combining characters and other characters that
		1615	do not fit into the normal text encoding will be replaced with characters
		1616	in the private use area.
		1617
		1618	You have to obey this encoding when changing text. The advantage is
		1619	that C<substr> and similar functions work on screen cells and not on
		1620	characters.
		1621
		1622	The methods C<< $term->special_encode >> and C<< $term->special_decode >>
		1623	can be used to convert normal strings into this encoding and vice versa.
		1624
		1625	=item $rend = $term->ROW_r ($row_number[, $new_rend[, $start_col]])
		1626
		1627	Like C<< $term->ROW_t >>, but returns an arrayref with rendition
		1628	bitsets. Rendition bitsets contain information about colour, font, font
		1629	styles and similar information. See also C<< $term->ROW_t >>.
		1630
		1631	When setting rendition, the font mask will be ignored.
		1632
		1633	See the section on RENDITION, above.
		1634
		1635	=item $length = $term->ROW_l ($row_number[, $new_length])
		1636
		1637	Returns the number of screen cells that are in use ("the line
		1638	length"). Unlike the urxvt core, this returns C<< $term->ncol >> if the
		1639	line is joined with the following one.
		1640
		1641	=item $bool = $term->is_longer ($row_number)
		1642
		1643	Returns true if the row is part of a multiple-row logical "line" (i.e.
		1644	joined with the following row), which means all characters are in use
		1645	and it is continued on the next row (and possibly a continuation of the
		1646	previous row(s)).
		1647
		1648	=item $line = $term->line ($row_number)
		1649
		1650	Create and return a new C<urxvt::line> object that stores information
		1651	about the logical line that row C<$row_number> is part of. It supports the
		1652	following methods:
		1653
		1654	=over 4
		1655
		1656	=item $text = $line->t ([$new_text])
		1657
		1658	Returns or replaces the full text of the line, similar to C<ROW_t>
		1659
		1660	=item $rend = $line->r ([$new_rend])
		1661
		1662	Returns or replaces the full rendition array of the line, similar to C<ROW_r>
		1663
		1664	=item $length = $line->l
		1665
		1666	Returns the length of the line in cells, similar to C<ROW_l>.
		1667
		1668	=item $rownum = $line->beg
		1669
		1670	=item $rownum = $line->end
		1671
		1672	Return the row number of the first/last row of the line, respectively.
		1673
		1674	=item $offset = $line->offset_of ($row, $col)
		1675
		1676	Returns the character offset of the given row|col pair within the logical
		1677	line. Works for rows outside the line, too, and returns corresponding
		1678	offsets outside the string.
		1679
		1680	=item ($row, $col) = $line->coord_of ($offset)
		1681
		1682	Translates a string offset into terminal coordinates again.
		1683
		1684	=back
		1685
		1686	=cut
		1687
		1688	sub line {
		1689	my ($self, $row) = @_;
		1690
		1691	my $maxrow = $self->nrow - 1;
		1692
		1693	my ($beg, $end) = ($row, $row);
		1694
		1695	--$beg while $self->ROW_is_longer ($beg - 1);
		1696	++$end while $self->ROW_is_longer ($end) && $end < $maxrow;
		1697
		1698	bless {
		1699	term => $self,
		1700	beg => $beg,
		1701	end => $end,
		1702	ncol => $self->ncol,
		1703	len => ($end - $beg) * $self->ncol + $self->ROW_l ($end),
		1704	}, urxvt::line::
		1705	}
		1706
		1707	sub urxvt::line::t {
		1708	my ($self) = @_;
		1709
		1710	if (@_ > 1)
		1711	{
		1712	$self->{term}->ROW_t ($_, $_[1], 0, ($_ - $self->{beg}) * $self->{ncol}, $self->{ncol})
		1713	for $self->{beg} .. $self->{end};
		1714	}
		1715
		1716	defined wantarray &&
		1717	substr +(join "", map $self->{term}->ROW_t ($_), $self->{beg} .. $self->{end}),
		1718	0, $self->{len}
		1719	}
		1720
		1721	sub urxvt::line::r {
		1722	my ($self) = @_;
		1723
		1724	if (@_ > 1)
		1725	{
		1726	$self->{term}->ROW_r ($_, $_[1], 0, ($_ - $self->{beg}) * $self->{ncol}, $self->{ncol})
		1727	for $self->{beg} .. $self->{end};
		1728	}
		1729
		1730	if (defined wantarray) {
		1731	my $rend = [
		1732	map @{ $self->{term}->ROW_r ($_) }, $self->{beg} .. $self->{end}
		1733	];
		1734	$#$rend = $self->{len} - 1;
		1735	return $rend;
270	}	1736	}
271		1737
272	$self->scr_overlay_new ($x, $y, $w, scalar @lines);	1738	()
273	$self->scr_overlay_set (0, $_, $lines[$_]) for 0.. $#lines;
274	}	1739	}
275		1740
276	=item $term->scr_overlay_new ($x, $y, $width, $height)	1741	sub urxvt::line::beg { $_[0]{beg} }
		1742	sub urxvt::line::end { $_[0]{end} }
		1743	sub urxvt::line::l { $_[0]{len} }
277		1744
278	Create a new (empty) overlay at the given position with the given	1745	sub urxvt::line::offset_of {
279	width/height. A border will be put around the box. If either C<$x> or	1746	my ($self, $row, $col) = @_;
280	C<$y> is negative, then this is counted from the right/bottom side,
281	respectively.
282		1747
283	=item $term->scr_overlay_off	1748	($row - $self->{beg}) * $self->{ncol} + $col
		1749	}
284		1750
285	Switch the overlay off again.	1751	sub urxvt::line::coord_of {
		1752	my ($self, $offset) = @_;
286		1753
287	=item $term->scr_overlay_set_char ($x, $y, $char, $rend = OVERLAY_RSTYLE)	1754	use integer;
288		1755
289	Put a single character (specified numerically) at the given overlay	1756	(
290	position.	1757	$offset / $self->{ncol} + $self->{beg},
		1758	$offset % $self->{ncol}
		1759	)
		1760	}
291		1761
292	=item $term->scr_overlay_set ($x, $y, $text)	1762	=item $text = $term->special_encode $string
293		1763
294	Write a string at the given position into the overlay.	1764	Converts a perl string into the special encoding used by rxvt-unicode,
		1765	where one character corresponds to one screen cell. See
		1766	C<< $term->ROW_t >> for details.
		1767
		1768	=item $string = $term->special_decode $text
		1769
		1770	Converts rxvt-unicodes text representation into a perl string. See
		1771	C<< $term->ROW_t >> for details.
		1772
		1773	=item $success = $term->grab_button ($button, $modifiermask[, $window = $term->vt])
		1774
		1775	=item $term->ungrab_button ($button, $modifiermask[, $window = $term->vt])
		1776
		1777	Register/unregister a synchronous button grab. See the XGrabButton
		1778	manpage.
		1779
		1780	=item $success = $term->grab ($eventtime[, $sync])
		1781
		1782	Calls XGrabPointer and XGrabKeyboard in asynchronous (default) or
		1783	synchronous (C<$sync> is true). Also remembers the grab timestamp.
		1784
		1785	=item $term->allow_events_async
		1786
		1787	Calls XAllowEvents with AsyncBoth for the most recent grab.
		1788
		1789	=item $term->allow_events_sync
		1790
		1791	Calls XAllowEvents with SyncBoth for the most recent grab.
		1792
		1793	=item $term->allow_events_replay
		1794
		1795	Calls XAllowEvents with both ReplayPointer and ReplayKeyboard for the most
		1796	recent grab.
		1797
		1798	=item $term->ungrab
		1799
		1800	Calls XUngrab for the most recent grab. Is called automatically on
		1801	evaluation errors, as it is better to lose the grab in the error case as
		1802	the session.
		1803
		1804	=item $atom = $term->XInternAtom ($atom_name[, $only_if_exists])
		1805
		1806	=item $atom_name = $term->XGetAtomName ($atom)
		1807
		1808	=item @atoms = $term->XListProperties ($window)
		1809
		1810	=item ($type,$format,$octets) = $term->XGetWindowProperty ($window, $property)
		1811
		1812	=item $term->XChangeProperty ($window, $property, $type, $format, $octets)
		1813
		1814	=item $term->XDeleteProperty ($window, $property)
		1815
		1816	=item $window = $term->DefaultRootWindow
		1817
		1818	=item $term->XReparentWindow ($window, $parent, [$x, $y])
		1819
		1820	=item $term->XMapWindow ($window)
		1821
		1822	=item $term->XUnmapWindow ($window)
		1823
		1824	=item $term->XMoveResizeWindow ($window, $x, $y, $width, $height)
		1825
		1826	=item ($x, $y, $child_window) = $term->XTranslateCoordinates ($src, $dst, $x, $y)
		1827
		1828	=item $term->XChangeInput ($window, $add_events[, $del_events])
		1829
		1830	Various X or X-related functions. The C<$term> object only serves as
		1831	the source of the display, otherwise those functions map more-or-less
		1832	directory onto the X functions of the same name.
295		1833
296	=back	1834	=back
		1835
		1836	=cut
		1837
		1838	package urxvt::popup;
		1839
		1840	=head2 The C<urxvt::popup> Class
		1841
		1842	=over 4
		1843
		1844	=cut
		1845
		1846	sub add_item {
		1847	my ($self, $item) = @_;
		1848
		1849	$item->{rend}{normal} = "\x1b[0;30;47m" unless exists $item->{rend}{normal};
		1850	$item->{rend}{hover} = "\x1b[0;30;46m" unless exists $item->{rend}{hover};
		1851	$item->{rend}{active} = "\x1b[m" unless exists $item->{rend}{active};
		1852
		1853	$item->{render} ||= sub { $_[0]{text} };
		1854
		1855	push @{ $self->{item} }, $item;
		1856	}
		1857
		1858	=item $popup->add_title ($title)
		1859
		1860	Adds a non-clickable title to the popup.
		1861
		1862	=cut
		1863
		1864	sub add_title {
		1865	my ($self, $title) = @_;
		1866
		1867	$self->add_item ({
		1868	rend => { normal => "\x1b[38;5;11;44m", hover => "\x1b[38;5;11;44m", active => "\x1b[38;5;11;44m" },
		1869	text => $title,
		1870	activate => sub { },
		1871	});
		1872	}
		1873
		1874	=item $popup->add_separator ([$sepchr])
		1875
		1876	Creates a separator, optionally using the character given as C<$sepchr>.
		1877
		1878	=cut
		1879
		1880	sub add_separator {
		1881	my ($self, $sep) = @_;
		1882
		1883	$sep ||= "=";
		1884
		1885	$self->add_item ({
		1886	rend => { normal => "\x1b[0;30;47m", hover => "\x1b[0;30;47m", active => "\x1b[0;30;47m" },
		1887	text => "",
		1888	render => sub { $sep x $self->{term}->ncol },
		1889	activate => sub { },
		1890	});
		1891	}
		1892
		1893	=item $popup->add_button ($text, $cb)
		1894
		1895	Adds a clickable button to the popup. C<$cb> is called whenever it is
		1896	selected.
		1897
		1898	=cut
		1899
		1900	sub add_button {
		1901	my ($self, $text, $cb) = @_;
		1902
		1903	$self->add_item ({ type => "button", text => $text, activate => $cb});
		1904	}
		1905
		1906	=item $popup->add_toggle ($text, $initial_value, $cb)
		1907
		1908	Adds a toggle/checkbox item to the popup. The callback gets called
		1909	whenever it gets toggled, with a boolean indicating its new value as its
		1910	first argument.
		1911
		1912	=cut
		1913
		1914	sub add_toggle {
		1915	my ($self, $text, $value, $cb) = @_;
		1916
		1917	my $item; $item = {
		1918	type => "button",
		1919	text => " $text",
		1920	value => $value,
		1921	render => sub { ($_[0]{value} ? "* " : " ") . $text },
		1922	activate => sub { $cb->($_[1]{value} = !$_[1]{value}); },
		1923	};
		1924
		1925	$self->add_item ($item);
		1926	}
		1927
		1928	=item $popup->show
		1929
		1930	Displays the popup (which is initially hidden).
		1931
		1932	=cut
		1933
		1934	sub show {
		1935	my ($self) = @_;
		1936
		1937	local $urxvt::popup::self = $self;
		1938
		1939	my $env = $self->{term}->env;
		1940	# we can't hope to reproduce the locale algorithm, so nuke LC_ALL and set LC_CTYPE.
		1941	delete $env->{LC_ALL};
		1942	$env->{LC_CTYPE} = $self->{term}->locale;
		1943
		1944	my $term = urxvt::term->new (
		1945	$env, "popup",
		1946	"--perl-lib" => "", "--perl-ext-common" => "",
		1947	"-pty-fd" => -1, "-sl" => 0,
		1948	"-b" => 1, "-bd" => "grey80", "-bl", "-override-redirect",
		1949	"--transient-for" => $self->{term}->parent,
		1950	"-display" => $self->{term}->display_id,
		1951	"-pe" => "urxvt-popup",
		1952	) or die "unable to create popup window\n";
		1953
		1954	unless (delete $term->{urxvt_popup_init_done}) {
		1955	$term->ungrab;
		1956	$term->destroy;
		1957	die "unable to initialise popup window\n";
		1958	}
		1959	}
		1960
		1961	sub DESTROY {
		1962	my ($self) = @_;
		1963
		1964	delete $self->{term}{_destroy}{$self};
		1965	$self->{term}->ungrab;
		1966	}
		1967
		1968	=back
		1969
		1970	=cut
		1971
		1972	package urxvt::watcher;
297		1973
298	=head2 The C<urxvt::timer> Class	1974	=head2 The C<urxvt::timer> Class
299		1975
300	This class implements timer watchers/events. Time is represented as a	1976	This class implements timer watchers/events. Time is represented as a
301	fractional number of seconds since the epoch. Example:	1977	fractional number of seconds since the epoch. Example:
302		1978
303	# create a digital clock display in upper right corner	1979	$term->{overlay} = $term->overlay (-1, 0, 8, 1, urxvt::OVERLAY_RSTYLE, 0);
304	$term->{timer} = urxvt::timer	1980	$term->{timer} = urxvt::timer
305	->new	1981	->new
306	->start (urxvt::NOW)	1982	->interval (1)
307	->cb (sub {	1983	->cb (sub {
308	my ($timer) = @_;
309	my $time = $timer->at;
310	$timer->start ($time + 1);
311	$self->scr_overlay (-1, 0,	1984	$term->{overlay}->set (0, 0,
312	POSIX::strftime "%H:%M:%S", localtime $time);	1985	sprintf "%2d:%02d:%02d", (localtime urxvt::NOW)[2,1,0]);
313	});	1986	});
314		1987
315	=over 4	1988	=over 4
316		1989
317	=item $timer = new urxvt::timer	1990	=item $timer = new urxvt::timer
318		1991
319	Create a new timer object in stopped state.	1992	Create a new timer object in started state. It is scheduled to fire
		1993	immediately.
320		1994
321	=item $timer = $timer->cb (sub { my ($timer) = @_; ... })	1995	=item $timer = $timer->cb (sub { my ($timer) = @_; ... })
322		1996
323	Set the callback to be called when the timer triggers.	1997	Set the callback to be called when the timer triggers.
324		1998
…		…
328		2002
329	=item $timer = $timer->set ($tstamp)	2003	=item $timer = $timer->set ($tstamp)
330		2004
331	Set the time the event is generated to $tstamp.	2005	Set the time the event is generated to $tstamp.
332		2006
		2007	=item $timer = $timer->interval ($interval)
		2008
		2009	Normally (and when C<$interval> is C<0>), the timer will automatically
		2010	stop after it has fired once. If C<$interval> is non-zero, then the timer
		2011	is automatically rescheduled at the given intervals.
		2012
333	=item $timer = $timer->start	2013	=item $timer = $timer->start
334		2014
335	Start the timer.	2015	Start the timer.
336		2016
337	=item $timer = $timer->start ($tstamp)	2017	=item $timer = $timer->start ($tstamp)
338		2018
339	Set the event trigger time to C<$tstamp> and start the timer.	2019	Set the event trigger time to C<$tstamp> and start the timer.
		2020
		2021	=item $timer = $timer->after ($delay)
		2022
		2023	Like C<start>, but sets the expiry timer to c<urxvt::NOW + $delay>.
340		2024
341	=item $timer = $timer->stop	2025	=item $timer = $timer->stop
342		2026
343	Stop the timer.	2027	Stop the timer.
344		2028
…		…
350		2034
351	$term->{socket} = ...	2035	$term->{socket} = ...
352	$term->{iow} = urxvt::iow	2036	$term->{iow} = urxvt::iow
353	->new	2037	->new
354	->fd (fileno $term->{socket})	2038	->fd (fileno $term->{socket})
355	->events (1) # wait for read data	2039	->events (urxvt::EV_READ)
356	->start	2040	->start
357	->cb (sub {	2041	->cb (sub {
358	my ($iow, $revents) = @_;	2042	my ($iow, $revents) = @_;
359	# $revents must be 1 here, no need to check	2043	# $revents must be 1 here, no need to check
360	sysread $term->{socket}, my $buf, 8192	2044	sysread $term->{socket}, my $buf, 8192
…		…
373	Set the callback to be called when io events are triggered. C<$reventmask>	2057	Set the callback to be called when io events are triggered. C<$reventmask>
374	is a bitset as described in the C<events> method.	2058	is a bitset as described in the C<events> method.
375		2059
376	=item $iow = $iow->fd ($fd)	2060	=item $iow = $iow->fd ($fd)
377		2061
378	Set the filedescriptor (not handle) to watch.	2062	Set the file descriptor (not handle) to watch.
379		2063
380	=item $iow = $iow->events ($eventmask)	2064	=item $iow = $iow->events ($eventmask)
381		2065
382	Set the event mask to watch. Bit #0 (value C<1>) enables watching for read	2066	Set the event mask to watch. The only allowed values are
383	data, Bit #1 (value C<2>) enables watching for write data.	2067	C<urxvt::EV_READ> and C<urxvt::EV_WRITE>, which might be ORed
		2068	together, or C<urxvt::EV_NONE>.
384		2069
385	=item $iow = $iow->start	2070	=item $iow = $iow->start
386		2071
387	Start watching for requested events on the given handle.	2072	Start watching for requested events on the given handle.
388		2073
389	=item $iow = $iow->stop	2074	=item $iow = $iow->stop
390		2075
391	Stop watching for events on the given filehandle.	2076	Stop watching for events on the given file handle.
		2077
		2078	=back
		2079
		2080	=head2 The C<urxvt::iw> Class
		2081
		2082	This class implements idle watchers, that get called automatically when
		2083	the process is idle. They should return as fast as possible, after doing
		2084	some useful work.
		2085
		2086	=over 4
		2087
		2088	=item $iw = new urxvt::iw
		2089
		2090	Create a new idle watcher object in stopped state.
		2091
		2092	=item $iw = $iw->cb (sub { my ($iw) = @_; ... })
		2093
		2094	Set the callback to be called when the watcher triggers.
		2095
		2096	=item $timer = $timer->start
		2097
		2098	Start the watcher.
		2099
		2100	=item $timer = $timer->stop
		2101
		2102	Stop the watcher.
		2103
		2104	=back
		2105
		2106	=head2 The C<urxvt::pw> Class
		2107
		2108	This class implements process watchers. They create an event whenever a
		2109	process exits, after which they stop automatically.
		2110
		2111	my $pid = fork;
		2112	...
		2113	$term->{pw} = urxvt::pw
		2114	->new
		2115	->start ($pid)
		2116	->cb (sub {
		2117	my ($pw, $exit_status) = @_;
		2118	...
		2119	});
		2120
		2121	=over 4
		2122
		2123	=item $pw = new urxvt::pw
		2124
		2125	Create a new process watcher in stopped state.
		2126
		2127	=item $pw = $pw->cb (sub { my ($pw, $exit_status) = @_; ... })
		2128
		2129	Set the callback to be called when the timer triggers.
		2130
		2131	=item $pw = $timer->start ($pid)
		2132
		2133	Tells the watcher to start watching for process C<$pid>.
		2134
		2135	=item $pw = $pw->stop
		2136
		2137	Stop the watcher.
		2138
		2139	=back
		2140
		2141	=head1 ENVIRONMENT
		2142
		2143	=head2 URXVT_PERL_VERBOSITY
		2144
		2145	This variable controls the verbosity level of the perl extension. Higher
		2146	numbers indicate more verbose output.
		2147
		2148	=over 4
		2149
		2150	=item == 0 - fatal messages
		2151
		2152	=item >= 3 - script loading and management
		2153
		2154	=item >=10 - all called hooks
		2155
		2156	=item >=11 - hook return values
392		2157
393	=back	2158	=back
394		2159
395	=head1 AUTHOR	2160	=head1 AUTHOR
396		2161
…		…
398	http://software.schmorp.de/pkg/rxvt-unicode	2163	http://software.schmorp.de/pkg/rxvt-unicode
399		2164
400	=cut	2165	=cut
401		2166
402	1	2167	1
		2168
		2169	# vim: sw=3:

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