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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
271=head3 cleanup ()
272
273Called when the server is cleaning up, just before it calls exit.
274
188=head3 clock ( ) 275=head3 clock ()
189 276
190Is invoked on every server tick, usually every 0.12 seconds. 277Is invoked on every server tick, usually every 0.12 seconds.
191 278
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
284
192=head2 PLAYER EVENTS 285=head2 PLAYER EVENTS
193 286
194Player events always have a player object as first argument. 287Player events always have a player object as first argument.
195 288
196=head3 reattach (player)
197
198Invoked whenever attachments/plug-ins need to get reattached to the player
199object. This usually happens when the player gets loaded from disk, or
200when the server is reloaded.
201
202=head3 birth (player) 289=head3 birth (player)
203 290
204Invoked as very first thing after creating a player. 291Invoked as very first thing after creating a player.
205 292
206=head3 quit (player) 293=head3 quit (player)
207 294
208Invoked wheneever a player quits, before actually removing him/her. 295Invoked wheneever a player quits, before actually removing him/her.
209 296
210=head3 kick (player params -- ) 297=head3 kick (player params -- )
211 298
212Invoked 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.
213 301
214=head3 load (player) 302=head3 load (player -- )
215 303
216Invoked whenever a player has been loaded from disk, but before 304Invoked whenever a player has been loaded from disk, but before
217actual login. 305actual login.
218 306
219=head3 save (player) 307=head3 save (player -- )
220 308
221Invoked 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.
222 322
223=head3 login (player) 323=head3 login (player)
224 324
225Invoked whenever a player logs in. 325Invoked whenever a player logs in.
226 326
227=head3 logout (player) 327=head3 logout (player cleanly -- )
228 328
229Invoked whenever a player logs out, gets disconnected etc. 329Invoked whenever a player logs out, gets disconnected etc.
230 330
231=head3 death (player) 331=head3 death (player)
232 332
233Invoked whenever a player dies, before the death actually gets processed. 333Invoked whenever a player dies, before the death actually gets processed.
234 334
235=head3 map_change (player oldmap newmap) 335=head3 map_change (player newmap x y -- )
236 336
237Invoked whenever a player moves from one map to another. 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.
342
343=head3 command (player command args -- time)
344
345Execute a user command send by the client. Programmable plug-ins usually
346handle this event internally.
238 347
239=head3 extcmd (player string) 348=head3 extcmd (player string)
240 349
241Invoked whenever a client issues the C<extcmd> protocol command. It's 350Invoked whenever a client issues the C<extcmd> protocol command.
242argument is passed without any changes. 351Programmable plug-ins usually handle this event internally.
243 352
244=head3 move (player direction -- ) 353=head3 move (player direction -- )
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.
245 360
246=head3 pray_altar (player altar skill -- ) 361=head3 pray_altar (player altar skill -- )
247 362
248Invoked 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>.
249 364
250=head3 tell (player name message -- ) 365=head3 tell (player name message -- )
251 366
252Invoked 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
253it gets processed. 368it gets processed.
254 369
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
255=head3 say (player message --) 375=head3 say (player message --)
256 376
257=head3 chat (player message --) 377=head3 chat (player message --)
258 378
259=head3 shout (player message --) 379=head3 shout (player message --)
270=head3 instantiate (map) 390=head3 instantiate (map)
271 391
272Original B<map> has been loaded (e.g. on first use, or after a map 392Original B<map> has been loaded (e.g. on first use, or after a map
273reset). 393reset).
274 394
275=head3 reattach (map)
276
277Invoked whenever attachments/plug-ins need to get reattached to the
278B<map>. This usually happens when the map was loaded from disk, or when the
279server was reloaded.
280
281=head3 destroy (map)
282
283Invoked when the map object gets destroyed, and only when the map object
284has a handler for this event. This event can occur many times, as its
285called when the in-memory object is destroyed, not when the object itself
286dies.
287
288=head3 swapin (map) 395=head3 swapin (map)
289 396
290Invoked when a previously swapped-out temporary B<map> has been loaded again. 397Invoked when a previously swapped-out temporary B<map> has been loaded again.
291 398
292=head3 swapout (map) 399=head3 swapout (map)
299 406
300=head3 clean (map) 407=head3 clean (map)
301 408
302Invoked when a temporary B<map> gets deleted on-disk. 409Invoked when a temporary B<map> gets deleted on-disk.
303 410
304=head3 enter (map player) 411=head3 enter (map player x y -- )
305 412
306Invoked whenever a player enters the B<map>. This event is likely unreliable. 413Invoked whenever a player tries to enter the B<map>, while he/she is still
414on the old map. Overriding means the player won't be able to enter, and,
415if newmap/x/y are given, will be redirected to that map instead.
307 416
308=head3 leave (map player) 417=head3 leave (map player -- )
309 418
310Invoked whenever a player leaves the B<map>. This event is likely unreliable. 419Invoked whenever a player tries to leave the B<map>. Overriding means the
420player won't be able to leave.
311 421
312=head3 upgrade (map)
313
314(TEMPORARY EVENT) gets invoked whenever a old-style map has been upgraded.
315
316=head3 trigger (map connection state) 422=head3 trigger (map connection state what? who? -- )
317 423
318Invoked whenever something activates a B<connection> on the B<map>. If B<state> 424Invoked whenever something activates a B<connection> on the B<map>. If B<state>
319is true the connection was 'state' and if false it is 'released'. 425is true the connection was 'state' and if false it is 'released'.
426
427
428=head2 CLIENT EVENTS
429
430These events are very similar to player events, but they are might be
431handled asynchronously as soon as the command reaches the server, even when
432the player hasn't logged in yet (meaning there is no player yet).
433
434=head3 connect (client -- )
435
436Called as soon as a new connection to the server is established. Should
437not be overriden.
438
439=head3 setup (client string -- )
440
441Client sent the setup command to negotiate parameters. Handling is
442mandatory and done by F<login.ext>.
443
444=head3 addme (client -- )
445
446The client sent an addme, thus ending the initial handshaking. Handling is mandatory
447and done by F<login.ext>.
448
449=head3 reply (client replystring -- )
450
451Called when the client submits a reply in the ST_CUSTOM state. Usually
452handled internally by language plugins.
453
454=head3 exticmd (client string -- )
455
456Like C<extcmd>, but can be called before a player has logged in.
457
458Programmable plug-ins usually handle this event internally.
459

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