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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
53=head3 destroy (object) 81=head3 destroy (object -- )
54 82
55Invoked when the crossfire object gets destroyed, and only when the object 83Invoked when the deliantra object gets destroyed, and only when the object
56has a handler for this event. This event can occur many times, as its 84has a handler for this event. This event can occur many times, as its
57called when the in-memory object is destroyed, not when the object itself 85called when the in-memory object is destroyed, not when the object itself
58dies. 86dies.
59 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
95=head3 add_bonus (item creator difficulty max_magic flags -- )
96
97A basic item has been created (e.g. for shops, monsters drops etc.)
98that needs bonus values applied. The B<creator> object is a template
99object that can be used to inherit stuff (and can be NULL). Flags is a
100combination of GT_ENVIRONMENT (???) or GT_STARTEQUIP (set FLAG_STARTEQUIP
101on item or set its value to 0) or GT_MINIMAL (???)
102
103When overriden, built-in bonus generation is skipped, otherwise
104treasure generation continues as it would without this hook.
105
106In general, if flags != 0 or creator != 0 you should just return and leave
107item generation to the standard code.
108
109=head3 remove (object -- )
110
111Invoked before the object is removed from its environment.
112
113=head3 insert (object -- )
114
115Called after the object was inserted into a container or map.
116
60=head3 tick (object) 117=head3 tick (object -- )
61 118
62Invoked 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
63during ticks should an objetc process any movement or other events. 120during ticks should an objetc process any movement or other events.
64 121
65=head3 kill (object hitter -- ) 122=head3 kill (object hitter -- )
66 123
67Invoked 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
68processing will skip removal, but to do this successfully you have to 125about to get removed. Overriding processing will skip removal, but to do
69objetc 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.
70 128
71=head3 apply (object who -- applytype) 129=head3 apply (object who -- applytype)
72 130
73Invoked 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:
74 132
79=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
80 138
81=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
82 140
83=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.
84 147
85=head3 throw (object thrower) 148=head3 throw (object thrower)
86 149
87Invoked when an B<object> is thrown by B<thrower>. 150Invoked when an B<object> is thrown by B<thrower>.
88 151
114Unwield/unapply/unready the given spell/weapon/skill/etc. B<object>, 177Unwield/unapply/unready the given spell/weapon/skill/etc. B<object>,
115currently 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'
116(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
117object was freed. 180object was freed.
118 181
119=head3 use_skill (skill who part direction strignarg -- ) 182=head3 use_skill (skill who part direction stringarg -- )
120 183
121Invoked whenever a skill is used by somebody or something. 184Invoked whenever a skill is used by somebody or something.
122 185
123=head3 cast_spell (spell casting_object owner direction stringarg -- ) 186=head3 cast_spell (spell owner casting_object direction stringarg -- )
124 187
125Invoked 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
126B<owner>). 189B<owner>).
127 190
128=head3 drop (object who -- ) 191=head3 drop (object who -- )
151damage that has been dealt. 214damage that has been dealt.
152 215
153=head3 skill_attack (attacker victim message skill -- success) 216=head3 skill_attack (attacker victim message skill -- success)
154 217
155Invoked 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
156cna 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
157damage is done. 220damage is done.
158 221
159=head3 weapon_attack (weapon hitter victim) 222=head3 weapon_attack (weapon hitter victim)
160 223
161Invoked 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
174 237
175Invoked whenever a trap-like B<object> has been activated, usually by 238Invoked whenever a trap-like B<object> has been activated, usually by
176moving onto it. This includes not just traps, but also buttons, holes, 239moving onto it. This includes not just traps, but also buttons, holes,
177signs and similar stuff. 240signs and similar stuff.
178 241
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
179=head3 close (container who -- ) 247=head3 close (container who -- )
180 248
181Invoked 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.
182 265
183 266
184=head2 GLOBAL EVENTS 267=head2 GLOBAL EVENTS
185 268
186Global events have no relation to specific objects. 269Global events have no relation to specific objects.
187 270
188=head3 cleanup () 271=head3 cleanup ()
189 272
190Called when the server is cleaning up, just before it calls exit. 273Called when the server is cleaning up, just before it calls exit.
191 274
192=head3 clock ( ) 275=head3 clock ()
193 276
194Is invoked on every server tick, usually every 0.12 seconds. 277Is invoked on every server tick, usually every 0.12 seconds.
195 278
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
196 284
197=head2 PLAYER EVENTS 285=head2 PLAYER EVENTS
198 286
199Player events always have a player object as first argument. 287Player events always have a player object as first argument.
200 288
201=head3 reattach (player)
202
203Invoked whenever attachments/plug-ins need to get reattached to the player
204object. This usually happens when the player gets loaded from disk, or
205when the server is reloaded.
206
207=head3 birth (player) 289=head3 birth (player)
208 290
209Invoked as very first thing after creating a player. 291Invoked as very first thing after creating a player.
210 292
211=head3 quit (player) 293=head3 quit (player)
212 294
213Invoked wheneever a player quits, before actually removing him/her. 295Invoked wheneever a player quits, before actually removing him/her.
214 296
215=head3 kick (player params -- ) 297=head3 kick (player params -- )
216 298
217Invoked 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.
218 301
219=head3 load (player) 302=head3 load (player -- )
220 303
221Invoked whenever a player has been loaded from disk, but before 304Invoked whenever after a player has been loaded from disk, but before
222actual login. 305actual activation/login.
223 306
224=head3 save (player) 307=head3 save (player -- )
225 308
226Invoked 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.
227 322
228=head3 login (player) 323=head3 login (player)
229 324
230Invoked whenever a player logs in. 325Invoked whenever a player logs in.
231 326
232=head3 logout (player) 327=head3 logout (player cleanly -- )
233 328
234Invoked whenever a player logs out, gets disconnected etc. 329Invoked whenever a player logs out, gets disconnected etc.
235 330
236=head3 death (player) 331=head3 death (player)
237 332
239 334
240=head3 map_change (player newmap x y -- ) 335=head3 map_change (player newmap x y -- )
241 336
242Invoked 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.
243 338
339=head3 region_change (player newregion oldregion -- )
340
341Invoked when a player entered a new region. Cannot be overriden.
342
343=head3 command (player command args -- time)
344
345Execute a user command sent by the client - this is invoked for I<all>
346command,s so should not normally be hooked.
347
348=head3 unknown_command (player command args -- time)
349
350Execute a user command sent by the client that isn't known to the
351server. Programmable plug-ins usually handle this event internally.
352
244=head3 extcmd (player string) 353=head3 extcmd (player string)
245 354
246Invoked whenever a client issues the C<extcmd> protocol command. It's 355Invoked whenever a client issues the C<extcmd> protocol command.
247argument is passed without any changes. 356Programmable plug-ins usually handle this event internally.
248 357
249=head3 move (player direction -- ) 358=head3 move (player direction -- )
359
360Called whenever the player is supposed to move or attack. The handler
361must handle the cases of speed_left or weapon_sp_left being negative,
362fire being on, is responsible for decreaseing the speed_left value
363on successful moves etc. etc.. When overriden, must return a boolean
364indicating wether a move could be effected.
250 365
251=head3 pray_altar (player altar skill -- ) 366=head3 pray_altar (player altar skill -- )
252 367
253Invoked whenever the B<player> prays over an B<altar>, using the given B<skill>. 368Invoked whenever the B<player> prays over an B<altar>, using the given B<skill>.
254 369
255=head3 tell (player name message -- ) 370=head3 tell (player name message -- )
256 371
257Invoked whenever the player uses the B<tell> or B<reply> command, before 372Invoked whenever the player uses the B<tell> or B<reply> command, before
258it gets processed. 373it gets processed.
259 374
375=head3 told (player player message -- )
376
377Invoked right before a message is being told to a player using B<tell> or
378B<reply>.
379
260=head3 say (player message --) 380=head3 say (player message --)
261 381
262=head3 chat (player message --) 382=head3 chat (player message --)
263 383
264=head3 shout (player message --) 384=head3 shout (player message --)
265 385
266Invoked whenever the player uses the B<say>, B<chat> or B<shout> command, 386Invoked whenever the player uses the B<say>, B<chat> or B<shout> command,
267before it gets processed. 387before it gets processed.
268 388
389=head3 build (player builder map x y --)
390
391Players tries to build using C<builder> at (map+x+y). Is invoked after the
392usual sanity checks, so the coordinates are valid.
393
269 394
270=head2 MAP EVENTS 395=head2 MAP EVENTS
271 396
272These events are generally dependent on a map and thus all have a map 397These events are generally dependent on a map and thus all have a map
273as first argument. 398as first argument.
274 399
275=head3 instantiate (map) 400=head3 instantiate (map)
276 401
277Original B<map> has been loaded (e.g. on first use, or after a map 402Original B<map> has been loaded (e.g. on first use, or after a map
278reset). 403reset).
279
280=head3 reattach (map)
281
282Invoked whenever attachments/plug-ins need to get reattached to the
283B<map>. This usually happens when the map was loaded from disk, or when the
284server was reloaded.
285
286=head3 destroy (map)
287
288Invoked when the map object gets destroyed, and only when the map object
289has a handler for this event. This event can occur many times, as its
290called when the in-memory object is destroyed, not when the object itself
291dies.
292 404
293=head3 swapin (map) 405=head3 swapin (map)
294 406
295Invoked when a previously swapped-out temporary B<map> has been loaded again. 407Invoked when a previously swapped-out temporary B<map> has been loaded again.
296 408
315=head3 leave (map player -- ) 427=head3 leave (map player -- )
316 428
317Invoked whenever a player tries to leave the B<map>. Overriding means the 429Invoked whenever a player tries to leave the B<map>. Overriding means the
318player won't be able to leave. 430player won't be able to leave.
319 431
320=head3 trigger (map connection state) 432=head3 trigger (map connection state what? who? -- )
321 433
322Invoked whenever something activates a B<connection> on the B<map>. If B<state> 434Invoked whenever something activates a B<connection> on the B<map>. If B<state>
323is true the connection was 'state' and if false it is 'released'. 435is true the connection was 'state' and if false it is 'released'.
324 436
437
438=head2 CLIENT EVENTS
439
440These events are very similar to player events, but they are might be
441handled asynchronously as soon as the command reaches the server, even when
442the player hasn't logged in yet (meaning there is no player yet).
443
444=head3 connect (client -- )
445
446Called as soon as a new connection to the server is established. Should
447not be overriden.
448
449=head3 setup (client string -- )
450
451Client sent the setup command to negotiate parameters. Handling is
452mandatory and done by F<login.ext>.
453
454=head3 addme (client -- )
455
456The client sent an addme, thus ending the initial handshaking. Handling is mandatory
457and done by F<login.ext>.
458
459=head3 reply (client replystring -- )
460
461Called when the client submits a reply in the ST_CUSTOM state. Usually
462handled internally by language plugins.
463
464=head3 exticmd (client string -- )
465
466Like C<extcmd>, but can be called before a player has logged in.
467
468Programmable plug-ins usually handle this event internally.
469
470=head3 client_destroy (client -- )
471
472Invoked when the client gets destroyed.
473
474

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