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Revision 1.3 by root, Mon Jan 2 15:59:25 2006 UTC vs.
Revision 1.110 by root, Thu Jan 19 16:22:13 2006 UTC

		1	=encoding utf8
		2
1	=head1 NAME	3	=head1 NAME
2		4
3	rxvtperl - rxvt-unicode's embedded perl interpreter	5	@@RXVT_NAME@@perl - rxvt-unicode's embedded perl interpreter
4		6
5	=head1 SYNOPSIS	7	=head1 SYNOPSIS
6		8
7	* Put your scripts into F<@@RXVT_LIBDIR@@/urxvt/perl-ext/>, they will be loaded automatically.	9	# create a file grab_test in $HOME:
8
9	* Each script will only be loaded once, even in urxvtd, and will be valid
10	globally.
11
12	* Scripts are evaluated in a 'use strict' and 'use utf8' environment, and
13	thus must be encoded as UTF-8.
14		10
15	sub on_sel_grab {	11	sub on_sel_grab {
16	warn "you selected ", $_[0]->selection;	12	warn "you selected ", $_[0]->selection;
17	()	13	()
18	}	14	}
19		15
20	1	16	# start a @@RXVT_NAME@@ using it:
		17
		18	@@RXVT_NAME@@ --perl-lib $HOME -pe grab_test
21		19
22	=head1 DESCRIPTION	20	=head1 DESCRIPTION
23		21
		22	Everytime a terminal object gets created, extension scripts specified via
		23	the C<perl> resource are loaded and associated with it.
		24
		25	Scripts are compiled in a 'use strict' and 'use utf8' environment, and
		26	thus must be encoded as UTF-8.
		27
		28	Each script will only ever be loaded once, even in @@RXVT_NAME@@d, where
		29	scripts will be shared (but not enabled) for all terminals.
		30
		31	=head1 PREPACKAGED EXTENSIONS
		32
		33	This section describes the extensions delivered with this release. You can
		34	find them in F<@@RXVT_LIBDIR@@/urxvt/perl/>.
		35
		36	You can activate them like this:
		37
		38	@@RXVT_NAME@@ -pe <extensionname>
		39
		40	=over 4
		41
		42	=item selection (enabled by default)
		43
		44	(More) intelligent selection. This extension tries to be more intelligent
		45	when the user extends selections (double-click and further clicks). Right
		46	now, it tries to select words, urls and complete shell-quoted
		47	arguments, which is very convenient, too, if your F<ls> supports
		48	C<--quoting-style=shell>.
		49
		50	A double-click usually selects the word under the cursor, further clicks
		51	will enlarge the selection.
		52
		53	The selection works by trying to match a number of regexes and displaying
		54	them in increasing order of length. You can add your own regexes by
		55	specifying resources of the form:
		56
		57	URxvt.selection.pattern-0: perl-regex
		58	URxvt.selection.pattern-1: perl-regex
		59	...
		60
		61	The index number (0, 1...) must not have any holes, and each regex must
		62	contain at least one pair of capturing parentheses, which will be used for
		63	the match. For example, the followign adds a regex that matches everything
		64	between two vertical bars:
		65
		66	URxvt.selection.pattern-0: \\|([^|]+)\\|
		67
		68	You can look at the source of the selection extension to see more
		69	interesting uses, such as parsing a line from beginning to end.
		70
		71	This extension also offers following bindable keyboard commands:
		72
		73	=over 4
		74
		75	=item rot13
		76
		77	Rot-13 the selection when activated. Used via keyboard trigger:
		78
		79	URxvt.keysym.C-M-r: perl:selection:rot13
		80
		81	=back
		82
		83	=item option-popup (enabled by default)
		84
		85	Binds a popup menu to Ctrl-Button2 that lets you toggle (some) options at
		86	runtime.
		87
		88	=item selection-popup (enabled by default)
		89
		90	Binds a popup menu to Ctrl-Button3 that lets you convert the selection
		91	text into various other formats/action (such as uri unescaping, perl
		92	evalution, web-browser starting etc.), depending on content.
		93
		94	Other extensions can extend this popup menu by pushing a code reference
		95	onto C<@{ $term->{selection_popup_hook} }>, that is called whenever the
		96	popup is displayed.
		97
		98	It's sole argument is the popup menu, which can be modified. The selection
		99	is in C<$_>, which can be used to decide wether to add something or not.
		100	It should either return nothing or a string and a code reference. The
		101	string will be used as button text and the code reference will be called
		102	when the button gets activated and should transform C<$_>.
		103
		104	The following will add an entry C<a to b> that transforms all C<a>s in
		105	the selection to C<b>s, but only if the selection currently contains any
		106	C<a>s:
		107
		108	push @{ $self->{term}{selection_popup_hook} }, sub {
		109	/a/ ? ("a to be" => sub { s/a/b/g }
		110	: ()
		111	};
		112
		113	=item searchable-scrollback<hotkey> (enabled by default)
		114
		115	Adds regex search functionality to the scrollback buffer, triggered
		116	by a hotkey (default: C<M-s>). While in search mode, normal terminal
		117	input/output is suspended and a regex is displayed at the bottom of the
		118	screen.
		119
		120	Inputting characters appends them to the regex and continues incremental
		121	search. C<BackSpace> removes a character from the regex, C<Up> and C<Down>
		122	search upwards/downwards in the scrollback buffer, C<End> jumps to the
		123	bottom. C<Escape> leaves search mode and returns to the point where search
		124	was started, while C<Enter> or C<Return> stay at the current position and
		125	additionally stores the first match in the current line into the primary
		126	selection.
		127
		128	=item selection-autotransform
		129
		130	This selection allows you to do automatic transforms on a selection
		131	whenever a selection is made.
		132
		133	It works by specifying perl snippets (most useful is a single C<s///>
		134	operator) that modify C<$_> as resources:
		135
		136	URxvt.selection-autotransform.0: transform
		137	URxvt.selection-autotransform.1: transform
		138	...
		139
		140	For example, the following will transform selections of the form
		141	C<filename:number>, often seen in compiler messages, into C<vi +$filename
		142	$word>:
		143
		144	URxvt.selection-autotransform.0: s/^([^:[:space:]]+):(\\d+):?$/vi +$2 \\Q$1\\E\\x0d/
		145
		146	And this example matches the same,but replaces it with vi-commands you can
		147	paste directly into your (vi :) editor:
		148
		149	URxvt.selection-autotransform.0: s/^([^:[:space:]]+(\\d+):?$/:e \\Q$1\\E\\x0d:$2\\x0d/
		150
		151	Of course, this can be modified to suit your needs and your editor :)
		152
		153	To expand the example above to typical perl error messages ("XXX at
		154	FILENAME line YYY."), you need a slightly more elaborate solution:
		155
		156	URxvt.selection.pattern-0: ( at .*? line \\d+[,.])
		157	URxvt.selection-autotransform.0: s/^ at (.*?) line (\\d+)[,.]$/:e \\Q$1\E\\x0d:$2\\x0d/
		158
		159	The first line tells the selection code to treat the unchanging part of
		160	every error message as a selection pattern, and the second line transforms
		161	the message into vi commands to load the file.
		162
		163	=item mark-urls
		164
		165	Uses per-line display filtering (C<on_line_update>) to underline urls and
		166	make them clickable. When middle-clicked, the program specified in the
		167	resource C<urlLauncher> (default C<x-www-browser>) will be started with
		168	the URL as first argument.
		169
		170	=item automove-background
		171
		172	This is basically a one-line extension that dynamically changes the background pixmap offset
		173	to the window position, in effect creating the same effect as pseudo transparency with
		174	a custom pixmap. No scaling is supported in this mode. Exmaple:
		175
		176	@@RXVT_NAME@@ -pixmap background.xpm -pe automove-background
		177
		178	=item block-graphics-to-ascii
		179
		180	A not very useful example of filtering all text output to the terminal,
		181	by replacing all line-drawing characters (U+2500 .. U+259F) by a
		182	similar-looking ascii character.
		183
		184	=item digital-clock
		185
		186	Displays a digital clock using the built-in overlay.
		187
		188	=item example-refresh-hooks
		189
		190	Displays a very simple digital clock in the upper right corner of the
		191	window. Illustrates overwriting the refresh callbacks to create your own
		192	overlays or changes.
		193
		194	=item selection-pastebin
		195
		196	This is a little rarely useful extension that Uploads the selection as
		197	textfile to a remote site (or does other things). (The implementation is
		198	not currently secure for use in a multiuser environment as it writes to
		199	F</tmp> directly.).
		200
		201	It listens to the C<selection-pastebin:remote-pastebin> keyboard command,
		202	i.e.
		203
		204	URxvt.keysym.C-M-e: perl:selection-pastebin:remote-pastebin
		205
		206	Pressing this combination runs a command with C<%> replaced by the name of
		207	the textfile. This command can be set via a resource:
		208
		209	URxvt.selection-pastebin.cmd: rsync -apP % ruth:/var/www/www.ta-sa.org/files/txt/.
		210
		211	And the default is likely not useful to anybody but the few people around
		212	here :)
		213
		214	The name of the textfile is the hex encoded md5 sum of the selection, so
		215	the same content should lead to the same filename.
		216
		217	After a successful upload the selection will be replaced by the text given
		218	in the C<selection-pastebin-url> resource (again, the % is the placeholder
		219	for the filename):
		220
		221	URxvt.selection-pastebin.url: http://www.ta-sa.org/files/txt/%
		222
		223	=back
		224
		225	=head1 API DOCUMENTATION
		226
		227	=head2 General API Considerations
		228
		229	All objects (such as terminals, time watchers etc.) are typical
		230	reference-to-hash objects. The hash can be used to store anything you
		231	like. All members starting with an underscore (such as C<_ptr> or
		232	C<_hook>) are reserved for internal uses and B<MUST NOT> be accessed or
		233	modified).
		234
		235	When objects are destroyed on the C++ side, the perl object hashes are
		236	emptied, so its best to store related objects such as time watchers and
		237	the like inside the terminal object so they get destroyed as soon as the
		238	terminal is destroyed.
		239
		240	Argument names also often indicate the type of a parameter. Here are some
		241	hints on what they mean:
		242
		243	=over 4
		244
		245	=item $text
		246
		247	Rxvt-unicodes special way of encoding text, where one "unicode" character
		248	always represents one screen cell. See L<ROW_t> for a discussion of this format.
		249
		250	=item $string
		251
		252	A perl text string, with an emphasis on I<text>. It can store all unicode
		253	characters and is to be distinguished with text encoded in a specific
		254	encoding (often locale-specific) and binary data.
		255
		256	=item $octets
		257
		258	Either binary data or - more common - a text string encoded in a
		259	locale-specific way.
		260
		261	=back
		262
		263	=head2 Extension Objects
		264
		265	Very perl extension is a perl class. A separate perl object is created
		266	for each terminal and each extension and passed as the first parameter to
		267	hooks. So extensions can use their C<$self> object without having to think
		268	about other extensions, with the exception of methods and members that
		269	begin with an underscore character C<_>: these are reserved for internal
		270	use.
		271
		272	Although it isn't a C<urxvt::term> object, you can call all methods of the
		273	C<urxvt::term> class on this object.
		274
		275	It has the following methods and data members:
		276
		277	=over 4
		278
		279	=item $urxvt_term = $self->{term}
		280
		281	Returns the C<urxvt::term> object associated with this instance of the
		282	extension. This member I<must not> be changed in any way.
		283
		284	=item $self->enable ($hook_name => $cb, [$hook_name => $cb..])
		285
		286	Dynamically enable the given hooks (named without the C<on_> prefix) for
		287	this extension, replacing any previous hook. This is useful when you want
		288	to overwrite time-critical hooks only temporarily.
		289
		290	=item $self->disable ($hook_name[, $hook_name..])
		291
		292	Dynamically disable the given hooks.
		293
		294	=back
		295
24	=head2 Hooks	296	=head2 Hooks
25		297
26	The following subroutines can be declared in loaded scripts, and will be called	298	The following subroutines can be declared in extension files, and will be
27	whenever the relevant event happens.	299	called whenever the relevant event happens.
28		300
		301	The first argument passed to them is an extension oject as described in
		302	the in the C<Extension Objects> section.
		303
29	All of them must return a boolean value. If it is true, then the event	304	B<All> of these hooks must return a boolean value. If it is true, then the
30	counts as being I<consumed>, and the invocation of other hooks is skipped,	305	event counts as being I<consumed>, and the invocation of other hooks is
31	and the relevant action might not be carried out by the C++ code.	306	skipped, and the relevant action might not be carried out by the C++ code.
32		307
33	When in doubt, return a false value (preferably C<()>).	308	I<< When in doubt, return a false value (preferably C<()>). >>
34		309
35	=over 4	310	=over 4
36		311
37	=item on_init $term	312	=item on_init $term
38		313
39	Called after a new terminal object has been initialized, but before	314	Called after a new terminal object has been initialized, but before
40	windows are created or the command gets run.	315	windows are created or the command gets run. Most methods are unsafe to
		316	call or deliver senseless data, as terminal size and other characteristics
		317	have not yet been determined. You can safely query and change resources,
		318	though.
41		319
42	=item on_reset $term	320	=item on_reset $term
43		321
44	Called after the screen is "reset" for any reason, such as resizing or	322	Called after the screen is "reset" for any reason, such as resizing or
45	control sequences. Here is where you can react on changes to size-related	323	control sequences. Here is where you can react on changes to size-related
…		…
48	=item on_start $term	326	=item on_start $term
49		327
50	Called at the very end of initialisation of a new terminal, just before	328	Called at the very end of initialisation of a new terminal, just before
51	returning to the mainloop.	329	returning to the mainloop.
52		330
		331	=item on_child_start $term, $pid
		332
		333	Called just after the child process has been C<fork>ed.
		334
		335	=item on_child_exit $term, $status
		336
		337	Called just after the child process has exited. C<$status> is the status
		338	from C<waitpid>.
		339
53	=item on_sel_make $term, $eventtime	340	=item on_sel_make $term, $eventtime
54		341
55	Called whenever a selection has been made by the user, but before the	342	Called whenever a selection has been made by the user, but before the
56	selection text is copied, so changes to the beginning, end or type of the	343	selection text is copied, so changes to the beginning, end or type of the
57	selection will be honored.	344	selection will be honored.
…		…
65	requested from the server. The selection text can be queried and changed	352	requested from the server. The selection text can be queried and changed
66	by calling C<< $term->selection >>.	353	by calling C<< $term->selection >>.
67		354
68	Returning a true value aborts selection grabbing. It will still be hilighted.	355	Returning a true value aborts selection grabbing. It will still be hilighted.
69		356
70	=item on_focus_in $term	357	=item on_sel_extend $term
71		358
72	Called whenever the window gets the keyboard focus, before urxvt does	359	Called whenever the user tries to extend the selection (e.g. with a double
73	focus in processing.	360	click) and is either supposed to return false (normal operation), or
		361	should extend the selection itelf and return true to suppress the built-in
		362	processing. This can happen multiple times, as long as the callback
		363	returns true, it will be called on every further click by the user and is
		364	supposed to enlarge the selection more and more, if possible.
74		365
75	=item on_focus_out $term	366	See the F<selection> example extension.
76
77	Called wheneever the window loses keyboard focus, before urxvt does focus
78	out processing.
79		367
80	=item on_view_change $term, $offset	368	=item on_view_change $term, $offset
81		369
82	Called whenever the view offset changes, i..e the user or program	370	Called whenever the view offset changes, i..e the user or program
83	scrolls. Offset C<0> means display the normal terminal, positive values	371	scrolls. Offset C<0> means display the normal terminal, positive values
…		…
91		379
92	It is called before lines are scrolled out (so rows 0 .. min ($lines - 1,	380	It is called before lines are scrolled out (so rows 0 .. min ($lines - 1,
93	$nrow - 1) represent the lines to be scrolled out). C<$saved> is the total	381	$nrow - 1) represent the lines to be scrolled out). C<$saved> is the total
94	number of lines that will be in the scrollback buffer.	382	number of lines that will be in the scrollback buffer.
95		383
96	=item on_tty_activity $term *NYI*	384	=item on_osc_seq $term, $string
97		385
98	Called whenever the program(s) running in the urxvt window send output.	386	Called whenever the B<ESC ] 777 ; string ST> command sequence (OSC =
		387	operating system command) is processed. Cursor position and other state
		388	information is up-to-date when this happens. For interoperability, the
		389	string should start with the extension name and a colon, to distinguish
		390	it from commands for other extensions, and this might be enforced in the
		391	future.
		392
		393	Be careful not ever to trust (in a security sense) the data you receive,
		394	as its source can not easily be controleld (e-mail content, messages from
		395	other users on the same system etc.).
		396
		397	=item on_add_lines $term, $string
		398
		399	Called whenever text is about to be output, with the text as argument. You
		400	can filter/change and output the text yourself by returning a true value
		401	and calling C<< $term->scr_add_lines >> yourself. Please note that this
		402	might be very slow, however, as your hook is called for B<all> text being
		403	output.
		404
		405	=item on_tt_write $term, $octets
		406
		407	Called whenever some data is written to the tty/pty and can be used to
		408	suppress or filter tty input.
		409
		410	=item on_line_update $term, $row
		411
		412	Called whenever a line was updated or changed. Can be used to filter
		413	screen output (e.g. underline urls or other useless stuff). Only lines
		414	that are being shown will be filtered, and, due to performance reasons,
		415	not always immediately.
		416
		417	The row number is always the topmost row of the line if the line spans
		418	multiple rows.
		419
		420	Please note that, if you change the line, then the hook might get called
		421	later with the already-modified line (e.g. if unrelated parts change), so
		422	you cannot just toggle rendition bits, but only set them.
99		423
100	=item on_refresh_begin $term	424	=item on_refresh_begin $term
101		425
102	Called just before the screen gets redrawn. Can be used for overlay	426	Called just before the screen gets redrawn. Can be used for overlay
103	or similar effects by modify terminal contents in refresh_begin, and	427	or similar effects by modify terminal contents in refresh_begin, and
…		…
106		430
107	=item on_refresh_end $term	431	=item on_refresh_end $term
108		432
109	Called just after the screen gets redrawn. See C<on_refresh_begin>.	433	Called just after the screen gets redrawn. See C<on_refresh_begin>.
110		434
		435	=item on_keyboard_command $term, $string
		436
		437	Called whenever the user presses a key combination that has a
		438	C<perl:string> action bound to it (see description of the B<keysym>
		439	resource in the @@RXVT_NAME@@(1) manpage).
		440
		441	=item on_x_event $term, $event
		442
		443	Called on every X event received on the vt window (and possibly other
		444	windows). Should only be used as a last resort. Most event structure
		445	members are not passed.
		446
		447	=item on_focus_in $term
		448
		449	Called whenever the window gets the keyboard focus, before rxvt-unicode
		450	does focus in processing.
		451
		452	=item on_focus_out $term
		453
		454	Called wheneever the window loses keyboard focus, before rxvt-unicode does
		455	focus out processing.
		456
		457	=item on_configure_notify $term, $event
		458
		459	=item on_key_press $term, $event, $keysym, $octets
		460
		461	=item on_key_release $term, $event, $keysym
		462
		463	=item on_button_press $term, $event
		464
		465	=item on_button_release $term, $event
		466
		467	=item on_motion_notify $term, $event
		468
		469	=item on_map_notify $term, $event
		470
		471	=item on_unmap_notify $term, $event
		472
		473	Called whenever the corresponding X event is received for the terminal If
		474	the hook returns true, then the even will be ignored by rxvt-unicode.
		475
		476	The event is a hash with most values as named by Xlib (see the XEvent
		477	manpage), with the additional members C<row> and C<col>, which are the row
		478	and column under the mouse cursor.
		479
		480	C<on_key_press> additionally receives the string rxvt-unicode would
		481	output, if any, in locale-specific encoding.
		482
		483	subwindow.
		484
		485	=back
		486
		487	=cut
		488
		489	package urxvt;
		490
		491	use utf8;
		492	use strict;
		493	use Carp ();
		494	use Scalar::Util ();
		495	use List::Util ();
		496
		497	our $VERSION = 1;
		498	our $TERM;
		499	our @HOOKNAME;
		500	our %HOOKTYPE = map +($HOOKNAME[$_] => $_), 0..$#HOOKNAME;
		501	our %OPTION;
		502
		503	our $LIBDIR;
		504	our $RESNAME;
		505	our $RESCLASS;
		506	our $RXVTNAME;
		507
		508	=head2 Variables in the C<urxvt> Package
		509
		510	=over 4
		511
		512	=item $urxvt::LIBDIR
		513
		514	The rxvt-unicode library directory, where, among other things, the perl
		515	modules and scripts are stored.
		516
		517	=item $urxvt::RESCLASS, $urxvt::RESCLASS
		518
		519	The resource class and name rxvt-unicode uses to look up X resources.
		520
		521	=item $urxvt::RXVTNAME
		522
		523	The basename of the installed binaries, usually C<urxvt>.
		524
		525	=item $urxvt::TERM
		526
		527	The current terminal. This variable stores the current C<urxvt::term>
		528	object, whenever a callback/hook is executing.
		529
111	=back	530	=back
112		531
113	=head2 Functions in the C<urxvt> Package	532	=head2 Functions in the C<urxvt> Package
114		533
115	=over 4	534	=over 4
…		…
120	costs! The only time this is acceptable is when the terminal process	539	costs! The only time this is acceptable is when the terminal process
121	starts up.	540	starts up.
122		541
123	=item urxvt::warn $string	542	=item urxvt::warn $string
124		543
125	Calls C<rxvt_warn> witht eh given string which should not include a	544	Calls C<rxvt_warn> with the given string which should not include a
126	newline. The module also overwrites the C<warn> builtin with a function	545	newline. The module also overwrites the C<warn> builtin with a function
127	that calls this function.	546	that calls this function.
128		547
129	Using this function has the advantage that its output ends up in the	548	Using this function has the advantage that its output ends up in the
130	correct place, e.g. on stderr of the connecting urxvtc client.	549	correct place, e.g. on stderr of the connecting urxvtc client.
131		550
132	=item $cellwidth = urxvt::wcswidth $string	551	Messages have a size limit of 1023 bytes currently.
133
134	Returns the number of screen-cells this string would need. Correctly
135	accounts for wide and combining characters.
136		552
137	=item $time = urxvt::NOW	553	=item $time = urxvt::NOW
138		554
139	Returns the "current time" (as per the event loop).	555	Returns the "current time" (as per the event loop).
140		556
141	=cut	557	=item urxvt::CurrentTime
142		558
143	package urxvt;	559	=item urxvt::ShiftMask, LockMask, ControlMask, Mod1Mask, Mod2Mask,
		560	Mod3Mask, Mod4Mask, Mod5Mask, Button1Mask, Button2Mask, Button3Mask,
		561	Button4Mask, Button5Mask, AnyModifier
144		562
145	use strict;	563	=item urxvt::NoEventMask, KeyPressMask, KeyReleaseMask,
		564	ButtonPressMask, ButtonReleaseMask, EnterWindowMask, LeaveWindowMask,
		565	PointerMotionMask, PointerMotionHintMask, Button1MotionMask, Button2MotionMask,
		566	Button3MotionMask, Button4MotionMask, Button5MotionMask, ButtonMotionMask,
		567	KeymapStateMask, ExposureMask, VisibilityChangeMask, StructureNotifyMask,
		568	ResizeRedirectMask, SubstructureNotifyMask, SubstructureRedirectMask,
		569	FocusChangeMask, PropertyChangeMask, ColormapChangeMask, OwnerGrabButtonMask
146		570
147	our $term;	571	=item urxvt::KeyPress, KeyRelease, ButtonPress, ButtonRelease, MotionNotify,
148	our @HOOKNAME;	572	EnterNotify, LeaveNotify, FocusIn, FocusOut, KeymapNotify, Expose,
149	our $LIBDIR;	573	GraphicsExpose, NoExpose, VisibilityNotify, CreateNotify, DestroyNotify,
		574	UnmapNotify, MapNotify, MapRequest, ReparentNotify, ConfigureNotify,
		575	ConfigureRequest, GravityNotify, ResizeRequest, CirculateNotify,
		576	CirculateRequest, PropertyNotify, SelectionClear, SelectionRequest,
		577	SelectionNotify, ColormapNotify, ClientMessage, MappingNotify
		578
		579	Various constants for use in X calls and event processing.
		580
		581	=back
		582
		583	=head2 RENDITION
		584
		585	Rendition bitsets contain information about colour, font, font styles and
		586	similar information for each screen cell.
		587
		588	The following "macros" deal with changes in rendition sets. You should
		589	never just create a bitset, you should always modify an existing one,
		590	as they contain important information required for correct operation of
		591	rxvt-unicode.
		592
		593	=over 4
		594
		595	=item $rend = urxvt::DEFAULT_RSTYLE
		596
		597	Returns the default rendition, as used when the terminal is starting up or
		598	being reset. Useful as a base to start when creating renditions.
		599
		600	=item $rend = urxvt::OVERLAY_RSTYLE
		601
		602	Return the rendition mask used for overlays by default.
		603
		604	=item $rendbit = urxvt::RS_Bold, RS_Italic, RS_Blink, RS_RVid, RS_Uline
		605
		606	Return the bit that enabled bold, italic, blink, reverse-video and
		607	underline, respectively. To enable such a style, just logically OR it into
		608	the bitset.
		609
		610	=item $foreground = urxvt::GET_BASEFG $rend
		611
		612	=item $background = urxvt::GET_BASEBG $rend
		613
		614	Return the foreground/background colour index, respectively.
		615
		616	=item $rend = urxvt::SET_FGCOLOR $rend, $new_colour
		617
		618	=item $rend = urxvt::SET_BGCOLOR $rend, $new_colour
		619
		620	Replace the foreground/background colour in the rendition mask with the
		621	specified one.
		622
		623	=item $value = urxvt::GET_CUSTOM $rend
		624
		625	Return the "custom" value: Every rendition has 5 bits for use by
		626	extensions. They can be set and changed as you like and are initially
		627	zero.
		628
		629	=item $rend = urxvt::SET_CUSTOM $rend, $new_value
		630
		631	Change the custom value.
		632
		633	=back
		634
		635	=cut
150		636
151	BEGIN {	637	BEGIN {
152	urxvt->bootstrap;
153
154	# overwrite perl's warn	638	# overwrite perl's warn
155	*CORE::GLOBAL::warn = sub {	639	*CORE::GLOBAL::warn = sub {
156	my $msg = join "", @_;	640	my $msg = join "", @_;
157	$msg .= "\n"	641	$msg .= "\n"
158	unless $msg =~ /\n$/;	642	unless $msg =~ /\n$/;
159	urxvt::warn ($msg);	643	urxvt::warn ($msg);
160	};	644	};
161	}	645	}
162		646
163	my $verbosity = $ENV{URXVT_PERL_VERBOSITY} || 10;	647	my $verbosity = $ENV{URXVT_PERL_VERBOSITY};
164		648
165	sub verbose {	649	sub verbose {
166	my ($level, $msg) = @_;	650	my ($level, $msg) = @_;
167	warn "$msg\n"; #d#	651	warn "$msg\n" if $level <= $verbosity;
168	}	652	}
169		653
170	my @invoke_cb;	654	my %extension_pkg;
		655
		656	# load a single script into its own package, once only
		657	sub extension_package($) {
		658	my ($path) = @_;
		659
		660	no strict 'refs';
		661
		662	$extension_pkg{$path} ||= do {
		663	$path =~ /([^\/\\]+)$/;
		664	my $pkg = $1;
		665	$pkg =~ s/[^[:word:]]/_/g;
		666	$pkg = "urxvt::ext::$pkg";
		667
		668	verbose 3, "loading extension '$path' into package '$pkg'";
		669
		670	open my $fh, "<:raw", $path
		671	or die "$path: $!";
		672
		673	@{"$pkg\::ISA"} = urxvt::term::extension::;
		674
		675	my $source =
		676	"package $pkg; use strict; use utf8;\n"
		677	. "#line 1 \"$path\"\n{\n"
		678	. (do { local $/; <$fh> })
		679	. "\n};\n1";
		680
		681	eval $source
		682	or die "$path: $@";
		683
		684	$pkg
		685	}
		686	}
		687
		688	our $retval; # return value for urxvt
171		689
172	# called by the rxvt core	690	# called by the rxvt core
173	sub invoke {	691	sub invoke {
174	local $term = shift;	692	local $TERM = shift;
175	my $htype = shift;	693	my $htype = shift;
176		694
177	my $cb = $invoke_cb[$htype];	695	if ($htype == 0) { # INIT
		696	my @dirs = ((split /:/, $TERM->resource ("perl_lib")), "$LIBDIR/perl");
		697
		698	my %ext_arg;
178		699
179	verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $term, @_) . ")"	700	for (map { split /,/, $TERM->resource ("perl_ext_$_") } 1, 2) {
180	if $verbosity >= 10;	701	if ($_ eq "default") {
		702	$ext_arg{$_} ||= [] for qw(selection option-popup selection-popup searchable-scrollback);
		703	} elsif (/^-(.*)$/) {
		704	delete $ext_arg{$1};
		705	} elsif (/^([^<]+)<(.*)>$/) {
		706	push @{ $ext_arg{$1} }, $2;
		707	} else {
		708	$ext_arg{$_} ||= [];
		709	}
		710	}
181		711
182	while (my ($k, $v) = each %$cb) {	712	while (my ($ext, $argv) = each %ext_arg) {
183	return 1 if $v->($term, @_);	713	my @files = grep -f $_, map "$_/$ext", @dirs;
		714
		715	if (@files) {
		716	$TERM->register_package (extension_package $files[0], $argv);
		717	} else {
		718	warn "perl extension '$ext' not found in perl library search path\n";
		719	}
		720	}
		721
		722	eval "#line 1 \"--perl-eval resource/argument\"\n" . $TERM->resource ("perl_eval");
		723	warn $@ if $@;
184	}	724	}
185		725
		726	$retval = undef;
		727
		728	if (my $cb = $TERM->{_hook}[$htype]) {
		729	verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $TERM, @_) . ")"
		730	if $verbosity >= 10;
		731
		732	keys %$cb;
		733
		734	while (my ($pkg, $cb) = each %$cb) {
		735	$retval = eval { $cb->($TERM->{_pkg}{$pkg}, @_) }
		736	and last;
		737
		738	if ($@) {
		739	$TERM->ungrab; # better to lose the grab than the session
		740	warn $@;
		741	}
		742	}
		743
		744	verbose 11, "$HOOKNAME[$htype] returning <$retval>"
		745	if $verbosity >= 11;
186	0	746	}
		747
		748	if ($htype == 1) { # DESTROY
		749	# clear package objects
		750	%$_ = () for values %{ $TERM->{_pkg} };
		751
		752	# clear package
		753	%$TERM = ();
		754	}
		755
		756	$retval
187	}	757	}
		758
		759	# urxvt::term::extension
		760
		761	package urxvt::term::extension;
		762
		763	sub enable {
		764	my ($self, %hook) = @_;
		765	my $pkg = $self->{_pkg};
		766
		767	while (my ($name, $cb) = each %hook) {
		768	my $htype = $HOOKTYPE{uc $name};
		769	defined $htype
		770	or Carp::croak "unsupported hook type '$name'";
		771
		772	$self->set_should_invoke ($htype, +1)
		773	unless exists $self->{term}{_hook}[$htype]{$pkg};
		774
		775	$self->{term}{_hook}[$htype]{$pkg} = $cb;
		776	}
		777	}
		778
		779	sub disable {
		780	my ($self, @hook) = @_;
		781	my $pkg = $self->{_pkg};
		782
		783	for my $name (@hook) {
		784	my $htype = $HOOKTYPE{uc $name};
		785	defined $htype
		786	or Carp::croak "unsupported hook type '$name'";
		787
		788	$self->set_should_invoke ($htype, -1)
		789	if delete $self->{term}{_hook}[$htype]{$pkg};
		790	}
		791	}
		792
		793	our $AUTOLOAD;
		794
		795	sub AUTOLOAD {
		796	$AUTOLOAD =~ /:([^:]+)$/
		797	or die "FATAL: \$AUTOLOAD '$AUTOLOAD' unparsable";
		798
		799	eval qq{
		800	sub $AUTOLOAD {
		801	my \$proxy = shift;
		802	\$proxy->{term}->$1 (\@_)
		803	}
		804	1
		805	} or die "FATAL: unable to compile method forwarder: $@";
		806
		807	goto &$AUTOLOAD;
		808	}
		809
		810	sub DESTROY {
		811	# nop
		812	}
		813
		814	# urxvt::destroy_hook
		815
		816	sub urxvt::destroy_hook::DESTROY {
		817	${$_[0]}->();
		818	}
		819
		820	sub urxvt::destroy_hook(&) {
		821	bless \shift, urxvt::destroy_hook::
		822	}
		823
		824	package urxvt::anyevent;
		825
		826	=head2 The C<urxvt::anyevent> Class
		827
		828	The sole purpose of this class is to deliver an interface to the
		829	C<AnyEvent> module - any module using it will work inside urxvt without
		830	further programming. The only exception is that you cannot wait on
		831	condition variables, but non-blocking condvar use is ok. What this means
		832	is that you cannot use blocking APIs, but the non-blocking variant should
		833	work.
		834
		835	=cut
		836
		837	our $VERSION = 1;
		838
		839	$INC{"urxvt/anyevent.pm"} = 1; # mark us as there
		840	push @AnyEvent::REGISTRY, [urxvt => urxvt::anyevent::];
		841
		842	sub timer {
		843	my ($class, %arg) = @_;
		844
		845	my $cb = $arg{cb};
		846
		847	urxvt::timer
		848	->new
		849	->start (urxvt::NOW + $arg{after})
		850	->cb (sub {
		851	$_[0]->stop; # need to cancel manually
		852	$cb->();
		853	})
		854	}
		855
		856	sub io {
		857	my ($class, %arg) = @_;
		858
		859	my $cb = $arg{cb};
		860
		861	bless [$arg{fh}, urxvt::iow
		862	->new
		863	->fd (fileno $arg{fh})
		864	->events (($arg{poll} =~ /r/ ? 1 : 0)
		865	| ($arg{poll} =~ /w/ ? 2 : 0))
		866	->start
		867	->cb (sub {
		868	$cb->(($_[1] & 1 ? 'r' : '')
		869	. ($_[1] & 2 ? 'w' : ''));
		870	})],
		871	urxvt::anyevent::
		872	}
		873
		874	sub DESTROY {
		875	$_[0][1]->stop;
		876	}
		877
		878	sub condvar {
		879	bless \my $flag, urxvt::anyevent::condvar::
		880	}
		881
		882	sub urxvt::anyevent::condvar::broadcast {
		883	${$_[0]}++;
		884	}
		885
		886	sub urxvt::anyevent::condvar::wait {
		887	unless (${$_[0]}) {
		888	Carp::croak "AnyEvent->condvar blocking wait unsupported in urxvt, use a non-blocking API";
		889	}
		890	}
		891
		892	package urxvt::term;
		893
		894	=head2 The C<urxvt::term> Class
		895
		896	=over 4
		897
		898	=cut
188		899
189	# find on_xxx subs in the package and register them	900	# find on_xxx subs in the package and register them
190	# as hooks	901	# as hooks
191	sub register_package($) {	902	sub register_package {
192	my ($pkg) = @_;	903	my ($self, $pkg, $argv) = @_;
193		904
		905	my $proxy = bless {
		906	_pkg => $pkg,
		907	argv => $argv,
		908	}, $pkg;
		909	Scalar::Util::weaken ($proxy->{term} = $self);
		910
		911	$self->{_pkg}{$pkg} = $proxy;
		912
194	for my $hook (0.. $#HOOKNAME) {	913	for my $name (@HOOKNAME) {
195	my $name = $HOOKNAME[$hook];
196
197	my $ref = $pkg->can ("on_" . lc $name)	914	if (my $ref = $pkg->can ("on_" . lc $name)) {
198	or next;	915	$proxy->enable ($name => $ref);
199		916	}
200	$invoke_cb[$hook]{$ref*1} = $ref;
201	set_should_invoke $hook, 1;
202	}	917	}
203	}	918	}
204		919
205	my $script_pkg = "script0000";	920	=item $term = new urxvt::term $envhashref, $rxvtname, [arg...]
206	my %script_pkg;
207		921
208	# load a single script into its own package, once only	922	Creates a new terminal, very similar as if you had started it with system
209	sub load_script($) {	923	C<$rxvtname, arg...>. C<$envhashref> must be a reference to a C<%ENV>-like
210	my ($path) = @_;	924	hash which defines the environment of the new terminal.
211		925
212	$script_pkg{$path} ||= do {	926	Croaks (and probably outputs an error message) if the new instance
213	my $pkg = $script_pkg++;	927	couldn't be created. Returns C<undef> if the new instance didn't
214	verbose 3, "loading script '$path' into package '$pkg'";	928	initialise perl, and the terminal object otherwise. The C<init> and
		929	C<start> hooks will be called during this call.
215		930
216	open my $fh, "<:raw", $path	931	=cut
217	or die "$path: $!";
218		932
219	eval "package $pkg; use strict; use utf8;\n"	933	sub new {
220	. "#line 1 \"$path\"\n"	934	my ($class, $env, @args) = @_;
221	. do { local $/; <$fh> }
222	or die "$path: $@";
223		935
224	register_package $pkg;	936	_new ([ map "$_=$env->{$_}", keys %$env ], @args);
225
226	$pkg
227	};
228	}	937	}
229		938
230	load_script $_ for grep -f $_, <$LIBDIR/perl-ext/*>;	939	=item $term->destroy
231		940
		941	Destroy the terminal object (close the window, free resources
		942	etc.). Please note that @@RXVT_NAME@@ will not exit as long as any event
		943	watchers (timers, io watchers) are still active.
232		944
233	=back	945	=item $term->exec_async ($cmd[, @args])
234		946
235	=head2 The C<urxvt::term> Class	947	Works like the combination of the C<fork>/C<exec> builtins, which executes
		948	("starts") programs in the background. This function takes care of setting
		949	the user environment before exec'ing the command (e.g. C<PATH>) and should
		950	be preferred over explicit calls to C<exec> or C<system>.
236		951
237	=over 4	952	Returns the pid of the subprocess or C<undef> on error.
		953
		954	=cut
		955
		956	sub exec_async {
		957	my $self = shift;
		958
		959	my $pid = fork;
		960
		961	return $pid
		962	if !defined $pid or $pid;
		963
		964	%ENV = %{ $self->env };
		965
		966	exec @_;
		967	urxvt::_exit 255;
		968	}
		969
		970	=item $isset = $term->option ($optval[, $set])
		971
		972	Returns true if the option specified by C<$optval> is enabled, and
		973	optionally change it. All option values are stored by name in the hash
		974	C<%urxvt::OPTION>. Options not enabled in this binary are not in the hash.
		975
		976	Here is a a likely non-exhaustive list of option names, please see the
		977	source file F</src/optinc.h> to see the actual list:
		978
		979	borderLess console cursorBlink cursorUnderline hold iconic insecure
		980	intensityStyles jumpScroll loginShell mapAlert meta8 mouseWheelScrollPage
		981	override-redirect pastableTabs pointerBlank reverseVideo scrollBar
		982	scrollBar_floating scrollBar_right scrollTtyKeypress scrollTtyOutput
		983	scrollWithBuffer secondaryScreen secondaryScroll skipBuiltinGlyphs
		984	transparent tripleclickwords utmpInhibit visualBell
		985
		986	=item $value = $term->resource ($name[, $newval])
		987
		988	Returns the current resource value associated with a given name and
		989	optionally sets a new value. Setting values is most useful in the C<init>
		990	hook. Unset resources are returned and accepted as C<undef>.
		991
		992	The new value must be properly encoded to a suitable character encoding
		993	before passing it to this method. Similarly, the returned value may need
		994	to be converted from the used encoding to text.
		995
		996	Resource names are as defined in F<src/rsinc.h>. Colours can be specified
		997	as resource names of the form C<< color+<index> >>, e.g. C<color+5>. (will
		998	likely change).
		999
		1000	Please note that resource strings will currently only be freed when the
		1001	terminal is destroyed, so changing options frequently will eat memory.
		1002
		1003	Here is a a likely non-exhaustive list of resource names, not all of which
		1004	are supported in every build, please see the source file F</src/rsinc.h>
		1005	to see the actual list:
		1006
		1007	answerbackstring backgroundPixmap backspace_key boldFont boldItalicFont
		1008	borderLess color cursorBlink cursorUnderline cutchars delete_key
		1009	display_name embed ext_bwidth fade font geometry hold iconName
		1010	imFont imLocale inputMethod insecure int_bwidth intensityStyles
		1011	italicFont jumpScroll lineSpace loginShell mapAlert meta8 modifier
		1012	mouseWheelScrollPage name override_redirect pastableTabs path perl_eval
		1013	perl_ext_1 perl_ext_2 perl_lib pointerBlank pointerBlankDelay
		1014	preeditType print_pipe pty_fd reverseVideo saveLines scrollBar
		1015	scrollBar_align scrollBar_floating scrollBar_right scrollBar_thickness
		1016	scrollTtyKeypress scrollTtyOutput scrollWithBuffer scrollstyle
		1017	secondaryScreen secondaryScroll selectstyle shade term_name title
		1018	transient_for transparent transparent_all tripleclickwords utmpInhibit
		1019	visualBell
		1020
		1021	=cut
		1022
		1023	sub resource($$;$) {
		1024	my ($self, $name) = (shift, shift);
		1025	unshift @_, $self, $name, ($name =~ s/\s*\+\s*(\d+)$// ? $1 : 0);
		1026	&urxvt::term::_resource
		1027	}
		1028
		1029	=item $value = $term->x_resource ($pattern)
		1030
		1031	Returns the X-Resource for the given pattern, excluding the program or
		1032	class name, i.e. C<< $term->x_resource ("boldFont") >> should return the
		1033	same value as used by this instance of rxvt-unicode. Returns C<undef> if no
		1034	resource with that pattern exists.
		1035
		1036	This method should only be called during the C<on_start> hook, as there is
		1037	only one resource database per display, and later invocations might return
		1038	the wrong resources.
		1039
		1040	=item $success = $term->parse_keysym ($keysym_spec, $command_string)
		1041
		1042	Adds a keymap translation exactly as specified via a resource. See the
		1043	C<keysym> resource in the @@RXVT_NAME@@(1) manpage.
		1044
		1045	=item $rend = $term->rstyle ([$new_rstyle])
		1046
		1047	Return and optionally change the current rendition. Text that is output by
		1048	the terminal application will use this style.
		1049
		1050	=item ($row, $col) = $term->screen_cur ([$row, $col])
		1051
		1052	Return the current coordinates of the text cursor position and optionally
		1053	set it (which is usually bad as applications don't expect that).
238		1054
239	=item ($row, $col) = $term->selection_mark ([$row, $col])	1055	=item ($row, $col) = $term->selection_mark ([$row, $col])
240		1056
241	=item ($row, $col) = $term->selection_beg ([$row, $col])	1057	=item ($row, $col) = $term->selection_beg ([$row, $col])
242		1058
243	=item ($row, $col) = $term->selection_end ([$row, $col])	1059	=item ($row, $col) = $term->selection_end ([$row, $col])
244		1060
245	Return the current values of the selection mark, begin or end positions,	1061	Return the current values of the selection mark, begin or end positions,
246	and optionally set them to new values.	1062	and optionally set them to new values.
247		1063
		1064	=item $term->selection_make ($eventtime[, $rectangular])
		1065
		1066	Tries to make a selection as set by C<selection_beg> and
		1067	C<selection_end>. If C<$rectangular> is true (default: false), a
		1068	rectangular selection will be made. This is the prefered function to make
		1069	a selection.
		1070
248	=item $success = $term->selection_grab ($eventtime)	1071	=item $success = $term->selection_grab ($eventtime)
249		1072
250	Try to request the primary selection from the server (for example, as set	1073	Try to request the primary selection text from the server (for example, as
251	by the next method).	1074	set by the next method). No visual feedback will be given. This function
		1075	is mostly useful from within C<on_sel_grab> hooks.
252		1076
253	=item $oldtext = $term->selection ([$newtext])	1077	=item $oldtext = $term->selection ([$newtext])
254		1078
255	Return the current selection text and optionally replace it by C<$newtext>.	1079	Return the current selection text and optionally replace it by C<$newtext>.
256		1080
257	=item $term->scr_overlay ($x, $y, $text)	1081	=item $term->overlay_simple ($x, $y, $text)
258		1082
259	Create a simple multi-line overlay box. See the next method for details.	1083	Create a simple multi-line overlay box. See the next method for details.
260		1084
261	=cut	1085	=cut
262		1086
263	sub urxvt::term::scr_overlay {	1087	sub overlay_simple {
264	my ($self, $x, $y, $text) = @_;	1088	my ($self, $x, $y, $text) = @_;
265		1089
266	my @lines = split /\n/, $text;	1090	my @lines = split /\n/, $text;
267		1091
268	my $w = 0;	1092	my $w = List::Util::max map $self->strwidth ($_), @lines;
269	for (map urxvt::wcswidth $_, @lines) {	1093
270	$w = $_ if $w < $_;	1094	my $overlay = $self->overlay ($x, $y, $w, scalar @lines);
		1095	$overlay->set (0, $_, $lines[$_]) for 0.. $#lines;
		1096
		1097	$overlay
		1098	}
		1099
		1100	=item $term->overlay ($x, $y, $width, $height[, $rstyle[, $border]])
		1101
		1102	Create a new (empty) overlay at the given position with the given
		1103	width/height. C<$rstyle> defines the initial rendition style
		1104	(default: C<OVERLAY_RSTYLE>).
		1105
		1106	If C<$border> is C<2> (default), then a decorative border will be put
		1107	around the box.
		1108
		1109	If either C<$x> or C<$y> is negative, then this is counted from the
		1110	right/bottom side, respectively.
		1111
		1112	This method returns an urxvt::overlay object. The overlay will be visible
		1113	as long as the perl object is referenced.
		1114
		1115	The methods currently supported on C<urxvt::overlay> objects are:
		1116
		1117	=over 4
		1118
		1119	=item $overlay->set ($x, $y, $text, $rend)
		1120
		1121	Similar to C<< $term->ROW_t >> and C<< $term->ROW_r >> in that it puts
		1122	text in rxvt-unicode's special encoding and an array of rendition values
		1123	at a specific position inside the overlay.
		1124
		1125	=item $overlay->hide
		1126
		1127	If visible, hide the overlay, but do not destroy it.
		1128
		1129	=item $overlay->show
		1130
		1131	If hidden, display the overlay again.
		1132
		1133	=back
		1134
		1135	=item $popup = $term->popup ($event)
		1136
		1137	Creates a new C<urxvt::popup> object that implements a popup menu. The
		1138	C<$event> I<must> be the event causing the menu to pop up (a button event,
		1139	currently).
		1140
		1141	=cut
		1142
		1143	sub popup {
		1144	my ($self, $event) = @_;
		1145
		1146	$self->grab ($event->{time}, 1)
		1147	or return;
		1148
		1149	my $popup = bless {
		1150	term => $self,
		1151	event => $event,
		1152	}, urxvt::popup::;
		1153
		1154	Scalar::Util::weaken $popup->{term};
		1155
		1156	$self->{_destroy}{$popup} = urxvt::destroy_hook { $popup->{popup}->destroy };
		1157	Scalar::Util::weaken $self->{_destroy}{$popup};
		1158
		1159	$popup
		1160	}
		1161
		1162	=item $cellwidth = $term->strwidth ($string)
		1163
		1164	Returns the number of screen-cells this string would need. Correctly
		1165	accounts for wide and combining characters.
		1166
		1167	=item $octets = $term->locale_encode ($string)
		1168
		1169	Convert the given text string into the corresponding locale encoding.
		1170
		1171	=item $string = $term->locale_decode ($octets)
		1172
		1173	Convert the given locale-encoded octets into a perl string.
		1174
		1175	=item $term->scr_xor_span ($beg_row, $beg_col, $end_row, $end_col[, $rstyle])
		1176
		1177	XORs the rendition values in the given span with the provided value
		1178	(default: C<RS_RVid>), which I<MUST NOT> contain font styles. Useful in
		1179	refresh hooks to provide effects similar to the selection.
		1180
		1181	=item $term->scr_xor_rect ($beg_row, $beg_col, $end_row, $end_col[, $rstyle1[, $rstyle2]])
		1182
		1183	Similar to C<scr_xor_span>, but xors a rectangle instead. Trailing
		1184	whitespace will additionally be xored with the C<$rstyle2>, which defaults
		1185	to C<RS_RVid | RS_Uline>, which removes reverse video again and underlines
		1186	it instead. Both styles I<MUST NOT> contain font styles.
		1187
		1188	=item $term->scr_bell
		1189
		1190	Ring the bell!
		1191
		1192	=item $term->scr_add_lines ($string)
		1193
		1194	Write the given text string to the screen, as if output by the application
		1195	running inside the terminal. It may not contain command sequences (escape
		1196	codes), but is free to use line feeds, carriage returns and tabs. The
		1197	string is a normal text string, not in locale-dependent encoding.
		1198
		1199	Normally its not a good idea to use this function, as programs might be
		1200	confused by changes in cursor position or scrolling. Its useful inside a
		1201	C<on_add_lines> hook, though.
		1202
		1203	=item $term->cmd_parse ($octets)
		1204
		1205	Similar to C<scr_add_lines>, but the argument must be in the
		1206	locale-specific encoding of the terminal and can contain command sequences
		1207	(escape codes) that will be interpreted.
		1208
		1209	=item $term->tt_write ($octets)
		1210
		1211	Write the octets given in C<$data> to the tty (i.e. as program input). To
		1212	pass characters instead of octets, you should convert your strings first
		1213	to the locale-specific encoding using C<< $term->locale_encode >>.
		1214
		1215	=item $old_events = $term->pty_ev_events ([$new_events])
		1216
		1217	Replaces the event mask of the pty watcher by the given event mask. Can
		1218	be used to suppress input and output handling to the pty/tty. See the
		1219	description of C<< urxvt::timer->events >>. Make sure to always restore
		1220	the previous value.
		1221
		1222	=item $windowid = $term->parent
		1223
		1224	Return the window id of the toplevel window.
		1225
		1226	=item $windowid = $term->vt
		1227
		1228	Return the window id of the terminal window.
		1229
		1230	=item $term->vt_emask_add ($x_event_mask)
		1231
		1232	Adds the specified events to the vt event mask. Useful e.g. when you want
		1233	to receive pointer events all the times:
		1234
		1235	$term->vt_emask_add (urxvt::PointerMotionMask);
		1236
		1237	=item $window_width = $term->width
		1238
		1239	=item $window_height = $term->height
		1240
		1241	=item $font_width = $term->fwidth
		1242
		1243	=item $font_height = $term->fheight
		1244
		1245	=item $font_ascent = $term->fbase
		1246
		1247	=item $terminal_rows = $term->nrow
		1248
		1249	=item $terminal_columns = $term->ncol
		1250
		1251	=item $has_focus = $term->focus
		1252
		1253	=item $is_mapped = $term->mapped
		1254
		1255	=item $max_scrollback = $term->saveLines
		1256
		1257	=item $nrow_plus_saveLines = $term->total_rows
		1258
		1259	=item $topmost_scrollback_row = $term->top_row
		1260
		1261	Return various integers describing terminal characteristics.
		1262
		1263	=item $x_display = $term->display_id
		1264
		1265	Return the DISPLAY used by rxvt-unicode.
		1266
		1267	=item $lc_ctype = $term->locale
		1268
		1269	Returns the LC_CTYPE category string used by this rxvt-unicode.
		1270
		1271	=item $env = $term->env
		1272
		1273	Returns a copy of the environment in effect for the terminal as a hashref
		1274	similar to C<\%ENV>.
		1275
		1276	=cut
		1277
		1278	sub env {
		1279	if (my $env = $_[0]->_env) {
		1280	+{ map /^([^=]+)(?:=(.*))?$/s && ($1 => $2), @$env }
		1281	} else {
		1282	+{ %ENV }
271	}	1283	}
272
273	$self->scr_overlay_new ($x, $y, $w, scalar @lines);
274	$self->scr_overlay_set (0, $_, $lines[$_]) for 0.. $#lines;
275	}	1284	}
276		1285
277	=item $term->scr_overlay_new ($x, $y, $width, $height)	1286	=item $modifiermask = $term->ModLevel3Mask
278		1287
279	Create a new (empty) overlay at the given position with the given	1288	=item $modifiermask = $term->ModMetaMask
280	width/height. A border will be put around the box. If either C<$x> or
281	C<$y> is negative, then this is counted from the right/bottom side,
282	respectively.
283		1289
284	=item $term->scr_overlay_off	1290	=item $modifiermask = $term->ModNumLockMask
285		1291
286	Switch the overlay off again.	1292	Return the modifier masks corresponding to the "ISO Level 3 Shift" (often
		1293	AltGr), the meta key (often Alt) and the num lock key, if applicable.
287		1294
288	=item $term->scr_overlay_set_char ($x, $y, $char, $rend = OVERLAY_RSTYLE)	1295	=item $view_start = $term->view_start ([$newvalue])
289		1296
290	Put a single character (specified numerically) at the given overlay	1297	Returns the row number of the topmost displayed line. Maximum value is
291	position.	1298	C<0>, which displays the normal terminal contents. Lower values scroll
		1299	this many lines into the scrollback buffer.
292		1300
293	=item $term->scr_overlay_set ($x, $y, $text)	1301	=item $term->want_refresh
294		1302
295	Write a string at the given position into the overlay.	1303	Requests a screen refresh. At the next opportunity, rxvt-unicode will
		1304	compare the on-screen display with its stored representation. If they
		1305	differ, it redraws the differences.
		1306
		1307	Used after changing terminal contents to display them.
		1308
		1309	=item $text = $term->ROW_t ($row_number[, $new_text[, $start_col]])
		1310
		1311	Returns the text of the entire row with number C<$row_number>. Row C<0>
		1312	is the topmost terminal line, row C<< $term->$ncol-1 >> is the bottommost
		1313	terminal line. The scrollback buffer starts at line C<-1> and extends to
		1314	line C<< -$term->nsaved >>. Nothing will be returned if a nonexistent line
		1315	is requested.
		1316
		1317	If C<$new_text> is specified, it will replace characters in the current
		1318	line, starting at column C<$start_col> (default C<0>), which is useful
		1319	to replace only parts of a line. The font index in the rendition will
		1320	automatically be updated.
		1321
		1322	C<$text> is in a special encoding: tabs and wide characters that use more
		1323	than one cell when displayed are padded with urxvt::NOCHAR characters
		1324	(C<chr 65535>). Characters with combining characters and other characters
		1325	that do not fit into the normal tetx encoding will be replaced with
		1326	characters in the private use area.
		1327
		1328	You have to obey this encoding when changing text. The advantage is
		1329	that C<substr> and similar functions work on screen cells and not on
		1330	characters.
		1331
		1332	The methods C<< $term->special_encode >> and C<< $term->special_decode >>
		1333	can be used to convert normal strings into this encoding and vice versa.
		1334
		1335	=item $rend = $term->ROW_r ($row_number[, $new_rend[, $start_col]])
		1336
		1337	Like C<< $term->ROW_t >>, but returns an arrayref with rendition
		1338	bitsets. Rendition bitsets contain information about colour, font, font
		1339	styles and similar information. See also C<< $term->ROW_t >>.
		1340
		1341	When setting rendition, the font mask will be ignored.
		1342
		1343	See the section on RENDITION, above.
		1344
		1345	=item $length = $term->ROW_l ($row_number[, $new_length])
		1346
		1347	Returns the number of screen cells that are in use ("the line
		1348	length"). Unlike the urxvt core, this returns C<< $term->ncol >> if the
		1349	line is joined with the following one.
		1350
		1351	=item $bool = $term->is_longer ($row_number)
		1352
		1353	Returns true if the row is part of a multiple-row logical "line" (i.e.
		1354	joined with the following row), which means all characters are in use
		1355	and it is continued on the next row (and possibly a continuation of the
		1356	previous row(s)).
		1357
		1358	=item $line = $term->line ($row_number)
		1359
		1360	Create and return a new C<urxvt::line> object that stores information
		1361	about the logical line that row C<$row_number> is part of. It supports the
		1362	following methods:
		1363
		1364	=over 4
		1365
		1366	=item $text = $line->t ([$new_text])
		1367
		1368	Returns or replaces the full text of the line, similar to C<ROW_t>
		1369
		1370	=item $rend = $line->r ([$new_rend])
		1371
		1372	Returns or replaces the full rendition array of the line, similar to C<ROW_r>
		1373
		1374	=item $length = $line->l
		1375
		1376	Returns the length of the line in cells, similar to C<ROW_l>.
		1377
		1378	=item $rownum = $line->beg
		1379
		1380	=item $rownum = $line->end
		1381
		1382	Return the row number of the first/last row of the line, respectively.
		1383
		1384	=item $offset = $line->offset_of ($row, $col)
		1385
		1386	Returns the character offset of the given row|col pair within the logical
		1387	line. Works for rows outside the line, too, and returns corresponding
		1388	offsets outside the string.
		1389
		1390	=item ($row, $col) = $line->coord_of ($offset)
		1391
		1392	Translates a string offset into terminal coordinates again.
		1393
		1394	=back
		1395
		1396	=cut
		1397
		1398	sub line {
		1399	my ($self, $row) = @_;
		1400
		1401	my $maxrow = $self->nrow - 1;
		1402
		1403	my ($beg, $end) = ($row, $row);
		1404
		1405	--$beg while $self->ROW_is_longer ($beg - 1);
		1406	++$end while $self->ROW_is_longer ($end) && $end < $maxrow;
		1407
		1408	bless {
		1409	term => $self,
		1410	beg => $beg,
		1411	end => $end,
		1412	ncol => $self->ncol,
		1413	len => ($end - $beg) * $self->ncol + $self->ROW_l ($end),
		1414	}, urxvt::line::
		1415	}
		1416
		1417	sub urxvt::line::t {
		1418	my ($self) = @_;
		1419
		1420	if (@_ > 1)
		1421	{
		1422	$self->{term}->ROW_t ($_, $_[1], 0, ($_ - $self->{beg}) * $self->{ncol}, $self->{ncol})
		1423	for $self->{beg} .. $self->{end};
		1424	}
		1425
		1426	defined wantarray &&
		1427	substr +(join "", map $self->{term}->ROW_t ($_), $self->{beg} .. $self->{end}),
		1428	0, $self->{len}
		1429	}
		1430
		1431	sub urxvt::line::r {
		1432	my ($self) = @_;
		1433
		1434	if (@_ > 1)
		1435	{
		1436	$self->{term}->ROW_r ($_, $_[1], 0, ($_ - $self->{beg}) * $self->{ncol}, $self->{ncol})
		1437	for $self->{beg} .. $self->{end};
		1438	}
		1439
		1440	if (defined wantarray) {
		1441	my $rend = [
		1442	map @{ $self->{term}->ROW_r ($_) }, $self->{beg} .. $self->{end}
		1443	];
		1444	$#$rend = $self->{len} - 1;
		1445	return $rend;
		1446	}
		1447
		1448	()
		1449	}
		1450
		1451	sub urxvt::line::beg { $_[0]{beg} }
		1452	sub urxvt::line::end { $_[0]{end} }
		1453	sub urxvt::line::l { $_[0]{len} }
		1454
		1455	sub urxvt::line::offset_of {
		1456	my ($self, $row, $col) = @_;
		1457
		1458	($row - $self->{beg}) * $self->{ncol} + $col
		1459	}
		1460
		1461	sub urxvt::line::coord_of {
		1462	my ($self, $offset) = @_;
		1463
		1464	use integer;
		1465
		1466	(
		1467	$offset / $self->{ncol} + $self->{beg},
		1468	$offset % $self->{ncol}
		1469	)
		1470	}
		1471
		1472	=item $text = $term->special_encode $string
		1473
		1474	Converts a perl string into the special encoding used by rxvt-unicode,
		1475	where one character corresponds to one screen cell. See
		1476	C<< $term->ROW_t >> for details.
		1477
		1478	=item $string = $term->special_decode $text
		1479
		1480	Converts rxvt-unicodes text reprsentation into a perl string. See
		1481	C<< $term->ROW_t >> for details.
		1482
		1483	=item $success = $term->grab_button ($button, $modifiermask)
		1484
		1485	Registers a synchronous button grab. See the XGrabButton manpage.
		1486
		1487	=item $success = $term->grab ($eventtime[, $sync])
		1488
		1489	Calls XGrabPointer and XGrabKeyboard in asynchronous (default) or
		1490	synchronous (C<$sync> is true). Also remembers the grab timestampe.
		1491
		1492	=item $term->allow_events_async
		1493
		1494	Calls XAllowEvents with AsyncBoth for the most recent grab.
		1495
		1496	=item $term->allow_events_sync
		1497
		1498	Calls XAllowEvents with SyncBoth for the most recent grab.
		1499
		1500	=item $term->allow_events_replay
		1501
		1502	Calls XAllowEvents with both ReplayPointer and ReplayKeyboard for the most
		1503	recent grab.
		1504
		1505	=item $term->ungrab
		1506
		1507	Calls XUngrab for the most recent grab. Is called automatically on
		1508	evaluation errors, as it is better to lose the grab in the error case as
		1509	the session.
		1510
		1511	=back
		1512
		1513	=cut
		1514
		1515	package urxvt::popup;
		1516
		1517	=head2 The C<urxvt::popup> Class
		1518
		1519	=over 4
		1520
		1521	=cut
		1522
		1523	sub add_item {
		1524	my ($self, $item) = @_;
		1525
		1526	$item->{rend}{normal} = "\x1b[0;30;47m" unless exists $item->{rend}{normal};
		1527	$item->{rend}{hover} = "\x1b[0;30;46m" unless exists $item->{rend}{hover};
		1528	$item->{rend}{active} = "\x1b[m" unless exists $item->{rend}{active};
		1529
		1530	$item->{render} ||= sub { $_[0]{text} };
		1531
		1532	push @{ $self->{item} }, $item;
		1533	}
		1534
		1535	=item $popup->add_title ($title)
		1536
		1537	Adds a non-clickable title to the popup.
		1538
		1539	=cut
		1540
		1541	sub add_title {
		1542	my ($self, $title) = @_;
		1543
		1544	$self->add_item ({
		1545	rend => { normal => "\x1b[38;5;11;44m", hover => "\x1b[38;5;11;44m", active => "\x1b[38;5;11;44m" },
		1546	text => $title,
		1547	activate => sub { },
		1548	});
		1549	}
		1550
		1551	=item $popup->add_separator ([$sepchr])
		1552
		1553	Creates a separator, optionally using the character given as C<$sepchr>.
		1554
		1555	=cut
		1556
		1557	sub add_separator {
		1558	my ($self, $sep) = @_;
		1559
		1560	$sep ||= "=";
		1561
		1562	$self->add_item ({
		1563	rend => { normal => "\x1b[0;30;47m", hover => "\x1b[0;30;47m", active => "\x1b[0;30;47m" },
		1564	text => "",
		1565	render => sub { $sep x $self->{term}->ncol },
		1566	activate => sub { },
		1567	});
		1568	}
		1569
		1570	=item $popup->add_button ($text, $cb)
		1571
		1572	Adds a clickable button to the popup. C<$cb> is called whenever it is
		1573	selected.
		1574
		1575	=cut
		1576
		1577	sub add_button {
		1578	my ($self, $text, $cb) = @_;
		1579
		1580	$self->add_item ({ type => "button", text => $text, activate => $cb});
		1581	}
		1582
		1583	=item $popup->add_toggle ($text, $cb, $initial_value)
		1584
		1585	Adds a toggle/checkbox item to the popup. Teh callback gets called
		1586	whenever it gets toggled, with a boolean indicating its value as its first
		1587	argument.
		1588
		1589	=cut
		1590
		1591	sub add_toggle {
		1592	my ($self, $text, $cb, $value) = @_;
		1593
		1594	my $item; $item = {
		1595	type => "button",
		1596	text => " $text",
		1597	value => $value,
		1598	render => sub { ($_[0]{value} ? "* " : " ") . $text },
		1599	activate => sub { $cb->($_[1]{value} = !$_[1]{value}); },
		1600	};
		1601
		1602	$self->add_item ($item);
		1603	}
		1604
		1605	=item $popup->show
		1606
		1607	Displays the popup (which is initially hidden).
		1608
		1609	=cut
		1610
		1611	sub show {
		1612	my ($self) = @_;
		1613
		1614	local $urxvt::popup::self = $self;
		1615
		1616	my $env = $self->{term}->env;
		1617	# we can't hope to reproduce the locale algorithm, so nuke LC_ALL and set LC_CTYPE.
		1618	delete $env->{LC_ALL};
		1619	$env->{LC_CTYPE} = $self->{term}->locale;
		1620
		1621	urxvt::term->new ($env, "popup",
		1622	"--perl-lib" => "", "--perl-ext-common" => "",
		1623	"-pty-fd" => -1, "-sl" => 0,
		1624	"-b" => 1, "-bd" => "grey80", "-bl", "-override-redirect",
		1625	"--transient-for" => $self->{term}->parent,
		1626	"-display" => $self->{term}->display_id,
		1627	"-pe" => "urxvt-popup")
		1628	or die "unable to create popup window\n";
		1629	}
		1630
		1631	sub DESTROY {
		1632	my ($self) = @_;
		1633
		1634	delete $self->{term}{_destroy}{$self};
		1635	$self->{term}->ungrab;
		1636	}
296		1637
297	=back	1638	=back
298		1639
299	=head2 The C<urxvt::timer> Class	1640	=head2 The C<urxvt::timer> Class
300		1641
301	This class implements timer watchers/events. Time is represented as a	1642	This class implements timer watchers/events. Time is represented as a
302	fractional number of seconds since the epoch. Example:	1643	fractional number of seconds since the epoch. Example:
303		1644
304	# create a digital clock display in upper right corner	1645	$term->{overlay} = $term->overlay (-1, 0, 8, 1, urxvt::OVERLAY_RSTYLE, 0);
305	$term->{timer} = urxvt::timer	1646	$term->{timer} = urxvt::timer
306	->new	1647	->new
307	->start (urxvt::NOW)	1648	->interval (1)
308	->cb (sub {	1649	->cb (sub {
309	my ($timer) = @_;
310	my $time = $timer->at;
311	$timer->start ($time + 1);
312	$self->scr_overlay (-1, 0,	1650	$term->{overlay}->set (0, 0,
313	POSIX::strftime "%H:%M:%S", localtime $time);	1651	sprintf "%2d:%02d:%02d", (localtime urxvt::NOW)[2,1,0]);
314	});	1652	});
315		1653
316	=over 4	1654	=over 4
317		1655
318	=item $timer = new urxvt::timer	1656	=item $timer = new urxvt::timer
319		1657
320	Create a new timer object in stopped state.	1658	Create a new timer object in started state. It is scheduled to fire
		1659	immediately.
321		1660
322	=item $timer = $timer->cb (sub { my ($timer) = @_; ... })	1661	=item $timer = $timer->cb (sub { my ($timer) = @_; ... })
323		1662
324	Set the callback to be called when the timer triggers.	1663	Set the callback to be called when the timer triggers.
325		1664
…		…
329		1668
330	=item $timer = $timer->set ($tstamp)	1669	=item $timer = $timer->set ($tstamp)
331		1670
332	Set the time the event is generated to $tstamp.	1671	Set the time the event is generated to $tstamp.
333		1672
		1673	=item $timer = $timer->interval ($interval)
		1674
		1675	Normally (and when C<$interval> is C<0>), the timer will automatically
		1676	stop after it has fired once. If C<$interval> is non-zero, then the timer
		1677	is automatically rescheduled at the given intervals.
		1678
334	=item $timer = $timer->start	1679	=item $timer = $timer->start
335		1680
336	Start the timer.	1681	Start the timer.
337		1682
338	=item $timer = $timer->start ($tstamp)	1683	=item $timer = $timer->start ($tstamp)
339		1684
340	Set the event trigger time to C<$tstamp> and start the timer.	1685	Set the event trigger time to C<$tstamp> and start the timer.
		1686
		1687	=item $timer = $timer->after ($delay)
		1688
		1689	Like C<start>, but sets the expiry timer to c<urxvt::NOW + $delay>.
341		1690
342	=item $timer = $timer->stop	1691	=item $timer = $timer->stop
343		1692
344	Stop the timer.	1693	Stop the timer.
345		1694
…		…
351		1700
352	$term->{socket} = ...	1701	$term->{socket} = ...
353	$term->{iow} = urxvt::iow	1702	$term->{iow} = urxvt::iow
354	->new	1703	->new
355	->fd (fileno $term->{socket})	1704	->fd (fileno $term->{socket})
356	->events (1) # wait for read data	1705	->events (urxvt::EVENT_READ)
357	->start	1706	->start
358	->cb (sub {	1707	->cb (sub {
359	my ($iow, $revents) = @_;	1708	my ($iow, $revents) = @_;
360	# $revents must be 1 here, no need to check	1709	# $revents must be 1 here, no need to check
361	sysread $term->{socket}, my $buf, 8192	1710	sysread $term->{socket}, my $buf, 8192
…		…
378		1727
379	Set the filedescriptor (not handle) to watch.	1728	Set the filedescriptor (not handle) to watch.
380		1729
381	=item $iow = $iow->events ($eventmask)	1730	=item $iow = $iow->events ($eventmask)
382		1731
383	Set the event mask to watch. Bit #0 (value C<1>) enables watching for read	1732	Set the event mask to watch. The only allowed values are
384	data, Bit #1 (value C<2>) enables watching for write data.	1733	C<urxvt::EVENT_READ> and C<urxvt::EVENT_WRITE>, which might be ORed
		1734	together, or C<urxvt::EVENT_NONE>.
385		1735
386	=item $iow = $iow->start	1736	=item $iow = $iow->start
387		1737
388	Start watching for requested events on the given handle.	1738	Start watching for requested events on the given handle.
389		1739
390	=item $iow = $iow->stop	1740	=item $iow = $iow->stop
391		1741
392	Stop watching for events on the given filehandle.	1742	Stop watching for events on the given filehandle.
		1743
		1744	=back
		1745
		1746	=head1 ENVIRONMENT
		1747
		1748	=head2 URXVT_PERL_VERBOSITY
		1749
		1750	This variable controls the verbosity level of the perl extension. Higher
		1751	numbers indicate more verbose output.
		1752
		1753	=over 4
		1754
		1755	=item == 0 - fatal messages
		1756
		1757	=item >= 3 - script loading and management
		1758
		1759	=item >=10 - all called hooks
		1760
		1761	=item >=11 - hook reutrn values
393		1762
394	=back	1763	=back
395		1764
396	=head1 AUTHOR	1765	=head1 AUTHOR
397		1766

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