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Comparing deliantra/Deliantra-Client/DC.pm (file contents):
Revision 1.85 by root, Thu Jun 1 05:04:34 2006 UTC vs.
Revision 1.114 by elmex, Mon Aug 14 04:34:40 2006 UTC

1=head1 NAME 1=head1 NAME
2 2
3CFClient - undocumented utility garbage for our crossfire client 3CFPlus - undocumented utility garbage for our crossfire client
4 4
5=head1 SYNOPSIS 5=head1 SYNOPSIS
6 6
7 use CFClient; 7 use CFPlus;
8 8
9=head1 DESCRIPTION 9=head1 DESCRIPTION
10 10
11=over 4 11=over 4
12 12
13=cut 13=cut
14 14
15package CFClient; 15package CFPlus;
16 16
17BEGIN { 17BEGIN {
18 $VERSION = '0.1'; 18 $VERSION = '0.2';
19 19
20 use XSLoader; 20 use XSLoader;
21 XSLoader::load "CFClient", $VERSION; 21 XSLoader::load "CFPlus", $VERSION;
22} 22}
23 23
24use utf8; 24use utf8;
25 25
26use Carp (); 26use Carp ();
27use AnyEvent (); 27use AnyEvent ();
28use BerkeleyDB; 28use BerkeleyDB;
29use Pod::POM ();
30use Scalar::Util ();
31use Storable (); # finally
32
33=item guard { BLOCK }
34
35Returns an object that executes the given block as soon as it is destroyed.
36
37=cut
38
39sub guard(&) {
40 bless \(my $cb = $_[0]), "CFPlus::Guard"
41}
42
43sub CFPlus::Guard::DESTROY {
44 ${$_[0]}->()
45}
46
47sub asxml($) {
48 local $_ = $_[0];
49
50 s/&/&/g;
51 s/>/>/g;
52 s/</&lt;/g;
53
54 $_
55}
56
57package CFPlus::Database;
58
59our @ISA = BerkeleyDB::Btree::;
60
61sub get($$) {
62 my $data;
63
64 $_[0]->db_get ($_[1], $data) == 0
65 ? $data
66 : ()
67}
68
69my %DB_SYNC;
70
71sub put($$$) {
72 my ($db, $key, $data) = @_;
73
74 $DB_SYNC{$db} = AnyEvent->timer (after => 5, cb => sub { $db->db_sync });
75
76 $db->db_put ($key => $data)
77}
78
79package CFPlus;
29 80
30sub find_rcfile($) { 81sub find_rcfile($) {
31 my $path; 82 my $path;
32 83
33 for (grep !ref, @INC) { 84 for (grep !ref, @INC) {
34 $path = "$_/CFClient/resources/$_[0]"; 85 $path = "$_/CFPlus/resources/$_[0]";
35 return $path if -r $path; 86 return $path if -r $path;
36 } 87 }
37 88
38 die "FATAL: can't find required file $_[0]\n"; 89 die "FATAL: can't find required file $_[0]\n";
39} 90}
40 91
92BEGIN {
93 use Crossfire::Protocol::Base ();
94 *to_json = \&Crossfire::Protocol::Base::to_json;
95 *from_json = \&Crossfire::Protocol::Base::from_json;
96}
97
41sub read_cfg { 98sub read_cfg {
42 my ($file) = @_; 99 my ($file) = @_;
43 100
44 open CFG, $file 101 open my $fh, $file
45 or return; 102 or return;
46 103
47 my $CFG;
48
49 local $/; 104 local $/;
50 $CFG = eval <CFG>; 105 my $CFG = <$fh>;
51 106
52 $::CFG = $CFG; 107 if ($CFG =~ /^---/) { ## TODO compatibility cruft, remove
53 108 require YAML;
54 close CFG; 109 utf8::decode $CFG;
110 $::CFG = YAML::Load ($CFG);
111 } elsif ($CFG =~ /^\{/) {
112 $::CFG = from_json $CFG;
113 } else {
114 $::CFG = eval $CFG; ## todo comaptibility cruft
115 }
55} 116}
56 117
57sub write_cfg { 118sub write_cfg {
58 my ($file) = @_; 119 my ($file) = @_;
59 120
60 open CFG, ">$file" 121 $::CFG->{VERSION} = $::VERSION;
122
123 open my $fh, ">:utf8", $file
61 or return; 124 or return;
62 125 print $fh to_json $::CFG;
63 {
64 require Data::Dumper;
65 local $Data::Dumper::Purity = 1;
66 $::CFG->{VERSION} = $::VERSION;
67 print CFG Data::Dumper->Dump ([$::CFG], [qw/CFG/]);
68 }
69
70 close CFG;
71} 126}
72
73mkdir "$Crossfire::VARDIR/cfplus", 0777;
74 127
75our $DB_ENV; 128our $DB_ENV;
76 129
77{ 130{
78 use strict; 131 use strict;
79 132
133 mkdir "$Crossfire::VARDIR/cfplus", 0777;
80 my $recover = $BerkeleyDB::db_version >= 4.4 134 my $recover = $BerkeleyDB::db_version >= 4.4
81 ? eval "DB_REGISTER | DB_RECOVER" 135 ? eval "DB_REGISTER | DB_RECOVER"
82 : 0; 136 : 0;
83 137
84 $DB_ENV = new BerkeleyDB::Env 138 $DB_ENV = new BerkeleyDB::Env
… …
95sub db_table($) { 149sub db_table($) {
96 my ($table) = @_; 150 my ($table) = @_;
97 151
98 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge; 152 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
99 153
100 new CFClient::Database 154 new CFPlus::Database
101 -Env => $DB_ENV, 155 -Env => $DB_ENV,
102 -Filename => $table, 156 -Filename => $table,
103# -Filename => "database", 157# -Filename => "database",
104# -Subname => $table, 158# -Subname => $table,
105 -Property => DB_CHKSUM, 159 -Property => DB_CHKSUM,
106 -Flags => DB_CREATE | DB_UPGRADE, 160 -Flags => DB_CREATE | DB_UPGRADE,
107 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error" 161 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
108} 162}
109 163
110sub pod_to_pango($) { 164package CFPlus::Layout;
111 my ($pom) = @_;
112 165
113 $pom->present ("CFClient::PodToPango") 166$CFPlus::OpenGL::SHUTDOWN_HOOK{"CFPlus::Layout"} = sub {
114} 167 reset_glyph_cache;
115
116sub pod_to_pango_list($) {
117 my ($pom) = @_;
118
119 [
120 map s/^(\s*)// && [40 * length $1, length $_ ? $_ : " "],
121 split /\n/, $pom->present ("CFClient::PodToPango")
122 ]
123}
124
125package CFClient::PodToPango;
126
127use base Pod::POM::View::Text;
128
129our $indent = 0;
130
131*view_seq_code =
132*view_seq_bold = sub { "<b>$_[1]</b>" };
133*view_seq_italic = sub { "<i>$_[1]</i>" };
134*view_seq_space =
135*view_seq_link =
136*view_seq_index = sub { CFClient::UI::Label::escape ($_[1]) };
137
138sub view_seq_text {
139 my $text = $_[1];
140 $text =~ s/\s+/ /g;
141 CFClient::UI::Label::escape ($text)
142}
143
144sub view_item {
145 ("\t" x ($indent / 4))
146 . $_[1]->title->present ($_[0])
147 . "\n"
148 . $_[1]->content->present ($_[0])
149}
150
151sub view_verbatim {
152 (join "",
153 map +("\t" x ($indent / 2)) . "<tt>$_</tt>\n",
154 split /\n/, CFClient::UI::Label::escape ($_[1]))
155 . "\n"
156}
157
158sub view_textblock {
159 ("\t" x ($indent / 2)) . "$_[1]\n\n"
160}
161
162sub view_head1 {
163 "\n\n<span foreground='#ffff00' size='x-large'>" . $_[1]->title->present ($_[0]) . "</span>\n\n"
164 . $_[1]->content->present ($_[0])
165}; 168};
166 169
167sub view_head2 {
168 "\n<span foreground='#ccccff' size='large'>" . $_[1]->title->present ($_[0]) . "</span>\n\n"
169 . $_[1]->content->present ($_[0])
170};
171
172sub view_head3 {
173 "\n<span size='large'>" . $_[1]->title->present ($_[0]) . "</span>\n\n"
174 . $_[1]->content->present ($_[0])
175};
176
177sub view_over {
178 local $indent = $indent + $_[1]->indent;
179 $_[1]->content->present ($_[0])
180}
181
182package CFClient::Database;
183
184our @ISA = BerkeleyDB::Btree::;
185
186sub get($$) {
187 my $data;
188
189 $_[0]->db_get ($_[1], $data) == 0
190 ? $data
191 : ()
192}
193
194my %DB_SYNC;
195
196sub put($$$) {
197 my ($db, $key, $data) = @_;
198
199 $DB_SYNC{$db} = AnyEvent->timer (after => 5, cb => sub { $db->db_sync });
200
201 $db->db_put ($key => $data)
202}
203
204package CFClient::Item; 170package CFPlus::Item;
205 171
206use strict; 172use strict;
207use Crossfire::Protocol::Constants; 173use Crossfire::Protocol::Constants;
208 174
209my $last_enter_count = 1; 175my $last_enter_count = 1;
… …
243} 209}
244 210
245sub do_n_dialog { 211sub do_n_dialog {
246 my ($cb) = @_; 212 my ($cb) = @_;
247 213
248 my $w = new CFClient::UI::FancyFrame; 214 my $w = new CFPlus::UI::Toplevel
215 on_delete => sub { $_[0]->destroy; 1 },
216 has_close_button => 1,
217 ;
218
249 $w->add (my $vb = new CFClient::UI::VBox x => "center", y => "center"); 219 $w->add (my $vb = new CFPlus::UI::VBox x => "center", y => "center");
250 $vb->add (new CFClient::UI::Label text => "Enter item count:"); 220 $vb->add (new CFPlus::UI::Label text => "Enter item count:");
251 $vb->add (my $entry = new CFClient::UI::Entry 221 $vb->add (my $entry = new CFPlus::UI::Entry
252 text => $last_enter_count, 222 text => $last_enter_count,
253 on_activate => sub { 223 on_activate => sub {
254 my ($entry) = @_; 224 my ($entry) = @_;
255 $last_enter_count = $entry->get_text; 225 $last_enter_count = $entry->get_text;
256 $cb->($last_enter_count); 226 $cb->($last_enter_count);
257 $w->hide; 227 $w->hide;
258 $w = undef; 228 $w->destroy;
229
230 0
259 } 231 },
232 on_escape => sub { $w->destroy; 1 },
260 ); 233 );
261 $entry->focus_in; 234 $entry->grab_focus;
262 $w->show; 235 $w->show;
263
264} 236}
265 237
266sub update_widgets { 238sub update_widgets {
267 my ($self) = @_; 239 my ($self) = @_;
240
241 # necessary to avoid cyclic references
242 Scalar::Util::weaken $self;
268 243
269 my $button_cb = sub { 244 my $button_cb = sub {
270 my (undef, $ev, $x, $y) = @_; 245 my (undef, $ev, $x, $y) = @_;
271 246
272 my $targ = $::CONN->{player}{tag}; 247 my $targ = $::CONN->{player}{tag};
273 248
274 if ($self->{container} == $::CONN->{player}{tag}) { 249 if ($self->{container} == $::CONN->{player}{tag}) {
275 $targ = $::CONN->{open_container}; 250 $targ = $::CONN->{open_container};
276 } 251 }
277 252
278 if (($ev->{mod} & CFClient::KMOD_SHIFT) && $ev->{button} == 1) { 253 if (($ev->{mod} & CFPlus::KMOD_SHIFT) && $ev->{button} == 1) {
279 $::CONN->send ("move $targ $self->{tag} 0") 254 $::CONN->send ("move $targ $self->{tag} 0")
280 if $targ || !($self->{flags} & F_LOCKED); 255 if $targ || !($self->{flags} & F_LOCKED);
256 } elsif (($ev->{mod} & CFPlus::KMOD_SHIFT) && $ev->{button} == 2) {
257 $self->{flags} & F_LOCKED
258 ? $::CONN->send ("lock " . pack "CN", 0, $self->{tag})
259 : $::CONN->send ("lock " . pack "CN", 1, $self->{tag})
281 } elsif ($ev->{button} == 1) { 260 } elsif ($ev->{button} == 1) {
282 $::CONN->send ("examine $self->{tag}"); 261 $::CONN->send ("examine $self->{tag}");
283 } elsif ($ev->{button} == 2) { 262 } elsif ($ev->{button} == 2) {
284 $::CONN->send ("apply $self->{tag}"); 263 $::CONN->send ("apply $self->{tag}");
285 } elsif ($ev->{button} == 3) { 264 } elsif ($ev->{button} == 3) {
265 my $move_prefix = $::CONN->{open_container} ? 'put' : 'drop';
266 if ($self->{container} == $::CONN->{open_container}) {
267 $move_prefix = "take";
268 }
269
286 my @menu_items = ( 270 my @menu_items = (
287 ["examine", sub { $::CONN->send ("examine $self->{tag}") }], 271 ["examine", sub { $::CONN->send ("examine $self->{tag}") }],
288 ["mark", sub { $::CONN->send ("mark ". pack "N", $self->{tag}) }], 272 ["mark", sub { $::CONN->send ("mark ". pack "N", $self->{tag}) }],
273 ["ignite/thaw", # first try of an easier use of flint&steel
274 sub {
275 $::CONN->send ("mark ". pack "N", $self->{tag});
276 $::CONN->send ("command apply flint and steel");
277 }
278 ],
279 ["inscribe", # first try of an easier use of flint&steel
280 sub {
281 &::open_string_query ("Text to inscribe", sub {
282 my ($entry, $txt) = @_;
283 $::CONN->send ("mark ". pack "N", $self->{tag});
284 $::CONN->send ("command use_skill inscription $txt");
285 });
286 }
287 ],
288 ["rename", # first try of an easier use of flint&steel
289 sub {
290 &::open_string_query ("Rename item to:", sub {
291 my ($entry, $txt) = @_;
292 $::CONN->send ("mark ". pack "N", $self->{tag});
293 $::CONN->send ("command rename to <$txt>");
294 });
295 }
296 ],
289 ["apply", sub { $::CONN->send ("apply $self->{tag}") }], 297 ["apply", sub { $::CONN->send ("apply $self->{tag}") }],
290 ( 298 (
291 $self->{flags} & F_LOCKED 299 $self->{flags} & F_LOCKED
292 ? ( 300 ? (
293 ["unlock", sub { $::CONN->send ("lock " . pack "CN", 0, $self->{tag}) }], 301 ["unlock", sub { $::CONN->send ("lock " . pack "CN", 0, $self->{tag}) }],
294 ) 302 )
295 : ( 303 : (
296 ["lock", sub { $::CONN->send ("lock " . pack "CN", 1, $self->{tag}) }], 304 ["lock", sub { $::CONN->send ("lock " . pack "CN", 1, $self->{tag}) }],
297 ["drop", sub { $::CONN->send ("move $::CONN->{open_container} $self->{tag} 0") }], 305 ["$move_prefix all", sub { $::CONN->send ("move $targ $self->{tag} 0") }],
298 ["move n", 306 ["$move_prefix &lt;n&gt;",
299 sub { 307 sub {
300 do_n_dialog (sub { $::CONN->send ("move $targ $self->{tag} $_[0]") }) 308 do_n_dialog (sub { $::CONN->send ("move $targ $self->{tag} $_[0]") })
301 } 309 }
302 ] 310 ]
303 ) 311 )
304 ), 312 ),
305 ); 313 );
306 314
307 CFClient::UI::Menu->new (items => \@menu_items)->popup ($ev); 315 CFPlus::UI::Menu->new (items => \@menu_items)->popup ($ev);
308 } 316 }
309 317
310 1 318 1
311 }; 319 };
312 320
313 my $tooltip_std = "<small>" 321 my $tooltip_std = "<small>"
314 . "Left click - examine item\n" 322 . "Left click - examine item\n"
315 . "Shift-Left click - " . ($self->{container} ? "move or drop" : "take") . " item\n" 323 . "Shift-Left click - " . ($self->{container} ? "move or drop" : "take") . " item\n"
316 . "Middle click - apply\n" 324 . "Middle click - apply\n"
325 . "Shift-Middle click - lock/unlock\n"
317 . "Right click - further options" 326 . "Right click - further options"
318 . "</small>\n"; 327 . "</small>\n";
319 328
329 my $bg = $self->{flags} & F_CURSED ? [1 , 0 , 0, 0.5]
330 : $self->{flags} & F_MAGIC ? [0.2, 0.2, 1, 0.5]
331 : undef;
332
320 $self->{face_widget} ||= new CFClient::UI::Face 333 $self->{face_widget} ||= new CFPlus::UI::Face
321 can_events => 1, 334 can_events => 1,
322 can_hover => 1, 335 can_hover => 1,
323 anim => $self->{anim}, 336 anim => $self->{anim},
324 animspeed => $self->{animspeed}, # TODO# must be set at creation time 337 animspeed => $self->{animspeed}, # TODO# must be set at creation time
325 on_button_down => $button_cb, 338 on_button_down => $button_cb,
326 ; 339 ;
340 $self->{face_widget}{bg} = $bg;
327 $self->{face_widget}{face} = $self->{face}; 341 $self->{face_widget}{face} = $self->{face};
328 $self->{face_widget}{anim} = $self->{anim}; 342 $self->{face_widget}{anim} = $self->{anim};
329 $self->{face_widget}{animspeed} = $self->{animspeed}; 343 $self->{face_widget}{animspeed} = $self->{animspeed};
330 $self->{face_widget}->set_tooltip ( 344 $self->{face_widget}->set_tooltip (
331 "<b>Face/Animation.</b>\n" 345 "<b>Face/Animation.</b>\n"
332 . "Item uses face #$self->{face}. " 346 . "Item uses face #$self->{face}. "
333 . ($self->{animspeed} ? "Item uses animation #$self->{anim} at " . (1 / $self->{animspeed}) . "fps. " : "Item is not animated. ") 347 . ($self->{animspeed} ? "Item uses animation #$self->{anim} at " . (1 / $self->{animspeed}) . "fps. " : "Item is not animated. ")
334 . "\n\n$tooltip_std" 348 . "\n\n$tooltip_std"
335 ); 349 );
336 350
337 $self->{desc_widget} ||= new CFClient::UI::Label 351 $self->{desc_widget} ||= new CFPlus::UI::Label
338 can_events => 1, 352 can_events => 1,
339 can_hover => 1, 353 can_hover => 1,
340 ellipsise => 2, 354 ellipsise => 2,
341 align => -1, 355 align => -1,
342 on_button_down => $button_cb, 356 on_button_down => $button_cb,
343 ; 357 ;
344 my $desc = CFClient::Item::desc_string $self; 358 my $desc = CFPlus::Item::desc_string $self;
359 $self->{desc_widget}{bg} = $bg;
345 $self->{desc_widget}->set_text ($desc); 360 $self->{desc_widget}->set_text ($desc);
346 $self->{desc_widget}->set_tooltip ("<b>$desc</b>.\n$tooltip_std"); 361 $self->{desc_widget}->set_tooltip ("<b>$desc</b>.\n$tooltip_std");
347 362
348 $self->{weight_widget} ||= new CFClient::UI::Label 363 $self->{weight_widget} ||= new CFPlus::UI::Label
349 can_events => 1, 364 can_events => 1,
350 can_hover => 1, 365 can_hover => 1,
351 ellipsise => 0, 366 ellipsise => 0,
352 align => 0, 367 align => 0,
353 on_button_down => $button_cb, 368 on_button_down => $button_cb,
354 ; 369 ;
370 $self->{weight_widget}{bg} = $bg;
355 $self->{weight_widget}->set_text (CFClient::Item::weight_string $self); 371 $self->{weight_widget}->set_text (CFPlus::Item::weight_string $self);
356
357 $self->{weight_widget}->set_tooltip ( 372 $self->{weight_widget}->set_tooltip (
358 "<b>Weight</b>.\n" 373 "<b>Weight</b>.\n"
359 . ($self->{weight} >= 0 ? "One item weighs $self->{weight}g. " : "You have no idea how much this weighs. ") 374 . ($self->{weight} >= 0 ? "One item weighs $self->{weight}g. " : "You have no idea how much this weighs. ")
360 . ($self->{nrof} ? "You have $self->{nrof} of it. " : "Item cannot stack with others of it's kind. ") 375 . ($self->{nrof} ? "You have $self->{nrof} of it. " : "Item cannot stack with others of it's kind. ")
361 . "\n\n$tooltip_std" 376 . "\n\n$tooltip_std"
362 ); 377 );
363} 378}
364 379
365package CFClient::Binder;
366
367my @ALLOWED_MODIFIER_KEYS = (
368 CFClient::SDLK_LSHIFT,
369 CFClient::SDLK_LCTRL ,
370 CFClient::SDLK_LALT ,
371 CFClient::SDLK_LMETA ,
372
373 CFClient::SDLK_RSHIFT,
374 CFClient::SDLK_RCTRL ,
375 CFClient::SDLK_RALT ,
376 CFClient::SDLK_RMETA ,
377);
378
379my %ALLOWED_MODIFIERS = (
380 CFClient::KMOD_LSHIFT => "LSHIFT",
381 CFClient::KMOD_LCTRL => "LCTRL",
382 CFClient::KMOD_LALT => "LALT",
383 CFClient::KMOD_LMETA => "LMETA",
384
385 CFClient::KMOD_RSHIFT => "RSHIFT",
386 CFClient::KMOD_RCTRL => "RCTRL",
387 CFClient::KMOD_RALT => "RALT",
388 CFClient::KMOD_RMETA => "RMETA",
389);
390
391my %DIRECT_BIND_CHARS = map { $_ => 1 } qw/0 1 2 3 4 5 6 7 8 9/;
392my @DIRECT_BIND_KEYS = (
393 CFClient::SDLK_F1,
394 CFClient::SDLK_F2,
395 CFClient::SDLK_F3,
396 CFClient::SDLK_F4,
397 CFClient::SDLK_F5,
398 CFClient::SDLK_F6,
399 CFClient::SDLK_F7,
400 CFClient::SDLK_F8,
401 CFClient::SDLK_F9,
402 CFClient::SDLK_F10,
403 CFClient::SDLK_F11,
404 CFClient::SDLK_F12,
405 CFClient::SDLK_F13,
406 CFClient::SDLK_F14,
407 CFClient::SDLK_F15,
408);
409
410# this binding dialog asks for a key-combo to be pressed
411# and if successful it calls the $cb with $mod and $sym as args.
412sub open_binding_dialog {
413 my ($cb) = @_;
414
415 my $w = new CFClient::UI::FancyFrame
416 title => "Bind Action",
417 x => "center",
418 y => "center";
419
420 $w->add (my $vb = new CFClient::UI::VBox);
421 $vb->add (new CFClient::UI::Label
422 text => "Press a modifier (CTRL, ALT and/or SHIFT) and a key."
423 ."You can only bind 0-9 and F1-F15 without modifiers."
424 );
425 $vb->add (my $entry = new CFClient::UI::Entry
426 text => "",
427 on_key_down => sub {
428 my ($entry, $ev) = @_;
429
430 my $mod = $ev->{mod};
431 my $sym = $ev->{sym};
432
433 # XXX: This seems a little bit hackisch to me, but i have to ignore them
434 if (grep { $_ == $sym } @ALLOWED_MODIFIER_KEYS) {
435 return;
436 }
437
438 if ($mod == CFClient::KMOD_NONE
439 and not $DIRECT_BIND_CHARS{chr ($ev->{unicode})}
440 and not grep { $sym == $_ } @DIRECT_BIND_KEYS)
441 {
442 $::STATUSBOX->add (
443 "Can't bind key ".CFClient::SDL_GetKeyName ($sym)
444 ." directly without modifier! It would damage the completer handling."
445 );
446 return;
447 }
448
449 $entry->focus_out;
450
451 $cb->($mod, $sym);
452
453 $w->destroy
454 });
455
456 $entry->focus_in;
457 $w->show;
458}
459
460sub keycombo_to_name {
461 my ($mod, $sym) = @_;
462
463 my $mods = join '+',
464 map { $ALLOWED_MODIFIERS{$_} }
465 grep { ($_ + 0) & ($mod + 0) }
466 keys %ALLOWED_MODIFIERS;
467 $mods .= "+" if $mods ne '';
468
469 return $mods . CFClient::SDL_GetKeyName ($sym);
470}
471
4721; 3801;
473 381
474=back 382=back
475 383
476=head1 AUTHOR 384=head1 AUTHOR

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