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1=head1 CROSSFIRE+ PLUG-IN EVENTS 1=begin comment
2
3 This file is part of Deliantra, the Roguelike Realtime MMORPG.
4
5 Copyright (©) 2005,2006,2007,2008,2009 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
6
7 Deliantra is free software: you can redistribute it and/or modify it under
8 the terms of the Affero GNU General Public License as published by the
9 Free Software Foundation, either version 3 of the License, or (at your
10 option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the Affero GNU General Public License
18 and the GNU General Public License along with this program. If not, see
19 <http://www.gnu.org/licenses/>.
20
21 The authors can be reached via e-mail to <support@deliantra.net>
22
23=end comment
24
25=head1 DELIANTRA PLUG-IN EVENTS
2 26
3This document briefly describes each plug-in event. It is also used to 27This document briefly describes each plug-in event. It is also used to
4generate the event-list itself, so is always complete. Be careful wehn 28generate the event-list itself, so is always complete. Be careful wehn
5changing it, though. 29changing it, though.
6 30
7=head2 NOTATION 31=head2 NOTATION
8 32
9the event description below uses a variant of the forth stack notation - 33The event description below uses a variant of the forth stack notation -
10an opening parenthesis followed by the type of each parameter, optionally 34an opening parenthesis followed by the type of each parameter, optionally
11followed by two dashes and the returning parameters. If the latter is 35followed by two dashes and the returning parameters. If the latter part is
12missing, the event will be invoked but cannot change wether the event gets 36missing, the event will be invoked but cannot change wether the event gets
13processed. 37processed.
14 38
15If it is specified (even if no return values are supported), a plug-in 39Return values are given by overriding (in Perl by calling C<cf::override>)
16can override (e.g. using C<cf::override> in Perl) event processing, 40with the return values, which will both stop further event processing and
17basically short-circuiting it. For example, if you override from within a 41tell the caller that it wants to override normal processing.
18player BIRTH event, nothing much will happen with respect to the built-in 42
43Even if no return values are supported, a plug-in can override (e.g. using
44C<cf::override> in Perl) event processing, basically short-circuiting
45it. For example, if you override from within a player BIRTH event,
46nothing much will happen with respect to the built-in processing, but if
19processing, but if you override from within a player TELL event, the tell 47you override from within a player TELL event, the tell will be ignored
20will be ignored (presumably your plug-in took care of it). 48(presumably your plug-in took care of it).
21 49
22 50
23=head2 OBJECT EVENTS 51=head2 ATTACHABLE EVENTS
24 52
25Object events always relate to a specific object, which is always the 53No time to document this, screw me.
26first argument. Not all events get generated for every object, some are
27specific to an object type.
28 54
29=head3 instantiate (object init-args...) 55=head3 instantiate (object init-args...)
30 56
31An archetype was instantiated into an object. This event occurs when 57An object was instantiated.
32a map is loaded for the first time, or when the object was created 58
59For objects, this event occurs when a map is loaded for the first time
60when it was instantiated from an archetype, or when the object was created
33dynamically. The arguments are as specified in the C<attach> attribute of 61dynamically. The arguments are as specified in the C<attach> attribute of
34the object or archetype. 62the object or archetype.
35 63
36This is useful to initialise any per-object state you might need. 64This is useful to initialise any per-object state you might need.
37 65
42server was reloaded. This event will only be generated if the object has 70server was reloaded. This event will only be generated if the object has
43attachments. 71attachments.
44 72
45=head3 clone (object destination) 73=head3 clone (object destination)
46 74
47An object with _attached extension_ is cloned, that is, a copy was 75An object with _attached plugin_ is cloned, that is, a copy was made. The
48made. The copy automatically has all attachments the original object 76copy automatically has all attachments the original object had. The perl
49had. The perl variables get copied in a shallow way (references are shared 77variables get copied in a shallow way (references are shared between
50between instances). If this is not the behaviour you need, you have to 78instances). If this is not the behaviour you need, you have to adjust the
51adjust the B<destination> object as you see fit. 79B<destination> object as you see fit.
52 80
81=head3 destroy (object -- )
82
83Invoked when the deliantra object gets destroyed, and only when the object
84has a handler for this event. This event can occur many times, as its
85called when the in-memory object is destroyed, not when the object itself
86dies.
87
88
89=head2 OBJECT EVENTS
90
91Object events always relate to a specific object, which is always the
92first argument. Not all events get generated for every object, some are
93specific to an object type.
94
53=head3 add_bonus (item creator difficulty max_magic flags) 95=head3 add_bonus (item creator difficulty max_magic flags -- )
54 96
55A basic item has been created (e.g. for shops, monsters drops etc.) 97A basic item has been created (e.g. for shops, monsters drops etc.)
56that needs bonus values applied. The B<creator> object is a template 98that needs bonus values applied. The B<creator> object is a template
57object that can be used to inherit stuff (and can be NULL). Flags is a 99object that can be used to inherit stuff (and can be NULL). Flags is a
58combination of GT_ENVIRONMENT (???) or GT_STARTEQUIP (set FLAG_STARTEQUIP 100combination of GT_ENVIRONMENT (???) or GT_STARTEQUIP (set FLAG_STARTEQUIP
62treasure generation continues as it would without this hook. 104treasure generation continues as it would without this hook.
63 105
64In general, if flags != 0 or creator != 0 you should just return and leave 106In general, if flags != 0 or creator != 0 you should just return and leave
65item generation to the standard code. 107item generation to the standard code.
66 108
67=head3 destroy (object) 109=head3 remove (object -- )
68 110
69Invoked when the crossfire object gets destroyed, and only when the object 111Invoked before the object is removed from its environment.
70has a handler for this event. This event can occur many times, as its
71called when the in-memory object is destroyed, not when the object itself
72dies.
73 112
113=head3 insert (object -- )
114
115Called after the object was inserted into a container or map.
116
74=head3 tick (object) 117=head3 tick (object -- )
75 118
76Invoked whenever the object "ticks", i.e. has positive B<speed_left>. Only 119Invoked whenever the object "ticks", i.e. has positive B<speed_left>. Only
77during ticks should an objetc process any movement or other events. 120during ticks should an objetc process any movement or other events.
78 121
79=head3 kill (object hitter -- ) 122=head3 kill (object hitter -- )
80 123
81Invoked whenever an object is dead and about to get removed. Overriding 124Invoked whenever an object was killed (hp < 0 caused by an attack) and is
82processing will skip removal, but to do this successfully you have to 125about to get removed. Overriding processing will skip removal, but to do
83objetc from dieing, otherwise the event gets invoked again and again. 126this successfully you have to keep the object from dieing, otherwise the
127event gets invoked again and again.
84 128
85=head3 apply (object who -- applytype) 129=head3 apply (object who -- applytype)
86 130
87Invoked whenever the object is being applied in some way. The applytype is one of: 131Invoked whenever the object is being applied in some way. The applytype is one of:
88 132
93=item B<1> has been applied, or there was an error applying the object 137=item B<1> has been applied, or there was an error applying the object
94 138
95=item B<2> objects of that type can't be applied if not in inventory 139=item B<2> objects of that type can't be applied if not in inventory
96 140
97=back 141=back
142
143=head3 reset (object)
144
145Invoked whenever the object is initialised on a map after it was
146loaded. This can be used to emulate shop-floor behaviour for example.
98 147
99=head3 throw (object thrower) 148=head3 throw (object thrower)
100 149
101Invoked when an B<object> is thrown by B<thrower>. 150Invoked when an B<object> is thrown by B<thrower>.
102 151
128Unwield/unapply/unready the given spell/weapon/skill/etc. B<object>, 177Unwield/unapply/unready the given spell/weapon/skill/etc. B<object>,
129currently applied by B<who>. If your override, make sure you give 'who' 178currently applied by B<who>. If your override, make sure you give 'who'
130(if it is a player) an indication of whats wrong. Must return true if the 179(if it is a player) an indication of whats wrong. Must return true if the
131object was freed. 180object was freed.
132 181
133=head3 use_skill (skill who part direction strignarg -- ) 182=head3 use_skill (skill who part direction stringarg -- )
134 183
135Invoked whenever a skill is used by somebody or something. 184Invoked whenever a skill is used by somebody or something.
136 185
137=head3 cast_spell (spell casting_object owner direction stringarg -- ) 186=head3 cast_spell (spell owner casting_object direction stringarg -- )
138 187
139Invoked whenever a given spell is cast by B<casting_object> (used by 188Invoked whenever a given spell is cast by B<casting_object> (used by
140B<owner>). 189B<owner>).
141 190
142=head3 drop (object who -- ) 191=head3 drop (object who -- )
165damage that has been dealt. 214damage that has been dealt.
166 215
167=head3 skill_attack (attacker victim message skill -- success) 216=head3 skill_attack (attacker victim message skill -- success)
168 217
169Invoked whenever an B<attacker> attacks B<victim> using a B<skill> (skill 218Invoked whenever an B<attacker> attacks B<victim> using a B<skill> (skill
170cna be C<undef>). B<message> is the message that describes the attack when 219can be C<undef>). B<message> is the message that describes the attack when
171damage is done. 220damage is done.
172 221
173=head3 weapon_attack (weapon hitter victim) 222=head3 weapon_attack (weapon hitter victim)
174 223
175Invoked whenever an object is used as a B<weapon> by B<hitter> to attack 224Invoked whenever an object is used as a B<weapon> by B<hitter> to attack
188 237
189Invoked whenever a trap-like B<object> has been activated, usually by 238Invoked whenever a trap-like B<object> has been activated, usually by
190moving onto it. This includes not just traps, but also buttons, holes, 239moving onto it. This includes not just traps, but also buttons, holes,
191signs and similar stuff. 240signs and similar stuff.
192 241
242=head3 open (container who -- )
243
244Invoked whenever a container gets opened. When overriden, the container will not
245get opened, but you must tell op about the reason.
246
193=head3 close (container who -- ) 247=head3 close (container who -- )
194 248
195Invoked whenever a container gets closed (this event is not yet reliable!). 249Invoked whenever a container gets closed. When overriden, the container
250will not get closed, but you must tell op about the reason. This event
251is not crash-safe, i.e. containers might be closed due to a server crash
252without this event being invoked.
253
254=head3 blocked_move (self who -- do_blocked)
255
256Invoked when an C<who> tries to move to the same space as C<self>,
257C<self>'s C<move_block> causes blocked movement for C<who> and nothing
258else explicitly allows movement to this space.
259
260Should return true when C<who> is blocked, i.e., should not be allowed to
261move onto C<self>.
262
263When not overriding, normal blocked_move (blocked_link) processing will
264happen.
196 265
197 266
198=head2 GLOBAL EVENTS 267=head2 GLOBAL EVENTS
199 268
200Global events have no relation to specific objects. 269Global events have no relation to specific objects.
201 270
202=head3 cleanup () 271=head3 cleanup ()
203 272
204Called when the server is cleaning up, just before it calls exit. 273Called when the server is cleaning up, just before it calls exit.
205 274
206=head3 clock ( ) 275=head3 clock ()
207 276
208Is invoked on every server tick, usually every 0.12 seconds. 277Is invoked on every server tick, usually every 0.12 seconds.
209 278
279=head3 resource_update ()
280
281Is invoked after each time the server reloads its resources, which is
282usually one of the earliest things it does when starting up.
283
210 284
211=head2 PLAYER EVENTS 285=head2 PLAYER EVENTS
212 286
213Player events always have a player object as first argument. 287Player events always have a player object as first argument.
214 288
215=head3 reattach (player)
216
217Invoked whenever attachments/plug-ins need to get reattached to the player
218object. This usually happens when the player gets loaded from disk, or
219when the server is reloaded.
220
221=head3 birth (player) 289=head3 birth (player)
222 290
223Invoked as very first thing after creating a player. 291Invoked as very first thing after creating a player.
224 292
225=head3 quit (player) 293=head3 quit (player)
226 294
227Invoked wheneever a player quits, before actually removing him/her. 295Invoked wheneever a player quits, before actually removing him/her.
228 296
229=head3 kick (player params -- ) 297=head3 kick (player params -- )
230 298
231Invoked when the given plaer is being kicked, before the kick is executed. 299Invoked when the given player is being kicked, before the kick is
300executed.
232 301
233=head3 load (player) 302=head3 load (player -- )
234 303
235Invoked whenever a player has been loaded from disk, but before 304Invoked whenever a player has been loaded from disk, but before
236actual login. 305actual login.
237 306
238=head3 save (player) 307=head3 save (player -- )
239 308
240Invoked just before a player gets saved. 309Invoked just before a player gets serialised.
310
311=head3 save_done (player -- )
312
313Invoked just after a player was serialised.
314
315=head3 connect (player -- )
316
317Invoked just after the player object was connected to a client.
318
319=head3 disconnect (player -- )
320
321Invoked just before the player gets disconnected from the client.
241 322
242=head3 login (player) 323=head3 login (player)
243 324
244Invoked whenever a player logs in. 325Invoked whenever a player logs in.
245 326
246=head3 logout (player) 327=head3 logout (player cleanly -- )
247 328
248Invoked whenever a player logs out, gets disconnected etc. 329Invoked whenever a player logs out, gets disconnected etc.
249 330
250=head3 death (player) 331=head3 death (player)
251 332
252Invoked whenever a player dies, before the death actually gets processed. 333Invoked whenever a player dies, before the death actually gets processed.
253 334
254=head3 map_change (player newmap x y -- ) 335=head3 map_change (player newmap x y -- )
255 336
256Invoked before a player moves from one map to another, can override the movement. 337Invoked before a player moves from one map to another, can override the movement.
338
339=head3 region_change (player newregion oldregion -- )
340
341Invoked when a player entered a new region. Cannot be overriden.
257 342
258=head3 command (player command args -- time) 343=head3 command (player command args -- time)
259 344
260Execute a user command send by the client. Programmable plug-ins usually 345Execute a user command send by the client. Programmable plug-ins usually
261handle this event internally. 346handle this event internally.
265Invoked whenever a client issues the C<extcmd> protocol command. 350Invoked whenever a client issues the C<extcmd> protocol command.
266Programmable plug-ins usually handle this event internally. 351Programmable plug-ins usually handle this event internally.
267 352
268=head3 move (player direction -- ) 353=head3 move (player direction -- )
269 354
355Called whenever the player is supposed to move or attack. The handler
356must handle the cases of speed_left or weapon_sp_left being negative,
357fire being on, is responsible for decreaseing the speed_left value
358on successful moves etc. etc.. When overriden, must return a boolean
359indicating wether a move could be effected.
360
270=head3 pray_altar (player altar skill -- ) 361=head3 pray_altar (player altar skill -- )
271 362
272Invoked whenever the B<player> prays over an B<altar>, using the given B<skill>. 363Invoked whenever the B<player> prays over an B<altar>, using the given B<skill>.
273 364
274=head3 tell (player name message -- ) 365=head3 tell (player name message -- )
275 366
276Invoked whenever the player uses the B<tell> or B<reply> command, before 367Invoked whenever the player uses the B<tell> or B<reply> command, before
277it gets processed. 368it gets processed.
278 369
370=head3 told (player player message -- )
371
372Invoked right before a message is being told to a player using B<tell> or
373B<reply>.
374
279=head3 say (player message --) 375=head3 say (player message --)
280 376
281=head3 chat (player message --) 377=head3 chat (player message --)
282 378
283=head3 shout (player message --) 379=head3 shout (player message --)
284 380
285Invoked whenever the player uses the B<say>, B<chat> or B<shout> command, 381Invoked whenever the player uses the B<say>, B<chat> or B<shout> command,
286before it gets processed. 382before it gets processed.
287 383
384=head3 build (player builder map x y --)
385
386Players tries to build using C<builder> at (map+x+y). Is invoked after the
387usual sanity checks, so the coordinates are valid.
388
288 389
289=head2 MAP EVENTS 390=head2 MAP EVENTS
290 391
291These events are generally dependent on a map and thus all have a map 392These events are generally dependent on a map and thus all have a map
292as first argument. 393as first argument.
293 394
294=head3 instantiate (map) 395=head3 instantiate (map)
295 396
296Original B<map> has been loaded (e.g. on first use, or after a map 397Original B<map> has been loaded (e.g. on first use, or after a map
297reset). 398reset).
298
299=head3 reattach (map)
300
301Invoked whenever attachments/plug-ins need to get reattached to the
302B<map>. This usually happens when the map was loaded from disk, or when the
303server was reloaded.
304
305=head3 destroy (map)
306
307Invoked when the map object gets destroyed, and only when the map object
308has a handler for this event. This event can occur many times, as its
309called when the in-memory object is destroyed, not when the object itself
310dies.
311 399
312=head3 swapin (map) 400=head3 swapin (map)
313 401
314Invoked when a previously swapped-out temporary B<map> has been loaded again. 402Invoked when a previously swapped-out temporary B<map> has been loaded again.
315 403
334=head3 leave (map player -- ) 422=head3 leave (map player -- )
335 423
336Invoked whenever a player tries to leave the B<map>. Overriding means the 424Invoked whenever a player tries to leave the B<map>. Overriding means the
337player won't be able to leave. 425player won't be able to leave.
338 426
339=head3 trigger (map connection state) 427=head3 trigger (map connection state what? who? -- )
340 428
341Invoked whenever something activates a B<connection> on the B<map>. If B<state> 429Invoked whenever something activates a B<connection> on the B<map>. If B<state>
342is true the connection was 'state' and if false it is 'released'. 430is true the connection was 'state' and if false it is 'released'.
343 431
344 432
346 434
347These events are very similar to player events, but they are might be 435These events are very similar to player events, but they are might be
348handled asynchronously as soon as the command reaches the server, even when 436handled asynchronously as soon as the command reaches the server, even when
349the player hasn't logged in yet (meaning there is no player yet). 437the player hasn't logged in yet (meaning there is no player yet).
350 438
439=head3 connect (client -- )
440
441Called as soon as a new connection to the server is established. Should
442not be overriden.
443
444=head3 setup (client string -- )
445
446Client sent the setup command to negotiate parameters. Handling is
447mandatory and done by F<login.ext>.
448
449=head3 addme (client -- )
450
451The client sent an addme, thus ending the initial handshaking. Handling is mandatory
452and done by F<login.ext>.
453
454=head3 reply (client replystring -- )
455
456Called when the client submits a reply in the ST_CUSTOM state. Usually
457handled internally by language plugins.
458
351=head3 exticmd (client string) 459=head3 exticmd (client string -- )
352 460
353Like C<extcmd>, but can be called before a player has logged in. 461Like C<extcmd>, but can be called before a player has logged in.
354 462
355Programmable plug-ins usually handle this event internally. 463Programmable plug-ins usually handle this event internally.
356 464

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