#charset "us-ascii"
#include "advlite.h"
/*
* ***************************************************************************
* attachables.t
*
* This module forms part of the adv3Lite library (c) 2012-13 Eric Eve
*
*
*
* The attachables file provides a framework for simple and common case
* attachables.
*
* It treats attachment as an asymmetric relationship. ATTACH A TO B is not
* the same as ATTACH B TO A. It also treats it as a many-to-one relationship:
* the object that is attached can only be attached to one object at a time,
* but the object it's attached to can have multiple objects attached to it.
*
*/
/*
* A SimpleAttachabe is a Thing that can be attached to other things or have
* other things attached to it in the special case in which the attached
* objects are located in the object to which they are attached.
* SimpleAttachable is also the base class for other types of attachable.
*/
class SimpleAttachable: Thing
/*
* Can an object be attached to this one? By default we return true if obj
* is on our list of allowableAttachments.
*/
allowAttach(obj)
{
return valToList(allowableAttachments).indexWhich(
{o: o.ofKind(obj) != nil});
}
/* A list of the objects or classes of objects that can be attached to me */
allowableAttachments = []
/* A list of the objects that are attached to me */
attachments = []
/* A SimpleAttachable can be attached to (some) other things. */
isAttachable = true
/* A SimpleAttachable can have (some) other things attached to it */
canAttachToMe = true
/* A SimpleAttachable can have (some) other things detached from it */
canDetachFromMe = true
/* The list of things I'm currentl attached to */
attachedToList = []
/* The object, if any, I'm currently attached to*/
attachedTo = (attachedToList == [] ? nil : attachedToList[1])
/*
* The object, if any, to which I'm initially attached (if I start out attached to anything).
* If this is defined, it should be another SimpleAttachable or subclass thereof.
*/
initiallyAttachedTo = nil
/*
* The location this object should be moved to when it's attached to
* another object. A SimpleAttachment should normally be moved into the to
* which it's attached.
*/
attachedLocation = (attachedTo)
/*
* The location this object should be moved to when it's detached. A
* SimpleAttachment should normally be moved into the location of the
* object it's just been detached from.
*/
detachedLocation = (attachedTo.location)
/* Attach this object to obj */
attachTo(obj)
{
/* Note that we're now attached to the iobj of the attach action */
makeAttachedTo(obj);
/* Add us to the iobj's list of attachments. */
obj.attachments = obj.attachments.appendUnique([self]);
/*
* If we're already in our attached location, there's no need to move,
* otherwise move us into our attached location.
*/
if(location != attachedLocation)
actionMoveInto(attachedLocation);
}
/* Add the object we're now attached to to our attachedToList */
makeAttachedTo(obj)
{
attachedToList = attachedToList.appendUnique([obj]);
}
/* Detach this item from obj */
detachFrom(obj)
{
/* If we're not attached to obj, then there's nothing to do */
if(!isAttachedTo(obj))
return;
/* If we're not already in our detachedLocation, move us there. */
if(location != detachedLocation)
moveInto(detachedLocation);
/*
* Remove us from the list of attachements of the object to which we
* were formerly attached.
*/
obj.attachments -= self;
/* Note that we're no longer attached to obj. */
makeDetachedFrom(obj);
}
/* FRemove obj the list of objeccts attached to us */
makeDetachedFrom(obj)
{
attachedToList -= obj;
}
/* Handling for the ATTACH TO action */
dobjFor(AttachTo)
{
preCond = [objHeld]
verify()
{
/* Carry out the inherited handling. */
inherited;
/* We can't be attached while we're already attached */
if(attachedTo == gVerifyIobj)
illogicalNow(alreadyAttachedMsg);
else if(attachedTo != nil)
illogicalNow(cannotAttachToMoreMsg);
}
action()
{
attachTo(gIobj);
}
report()
{
say(okayAttachMsg);
}
}
okayAttachMsg = BMsg(okay attach, '{I} attach{es/ed} {1} to {the iobj}. ',
gActionListStr)
alreadyAttachedMsg = BMsg(already attached, '{The subj dobj} {is} already
attached to {1}. ', attachedTo.theName)
cannotAttachToMoreMsg = BMsg(cannot attach to more, '{I} {can\'t} attach
{the dobj} to anything else while {he dobj}{\'s} attached to {1}. ',
makeListStr(attachedToList, &theName))
iobjFor(AttachTo)
{
preCond = [touchObj]
verify()
{
/* Carry out the inherited handling. */
inherited;
/*
* If we don't allow the dobj to be attached to us, rule out the
* attachment.
*/
if(!allowAttach(gVerifyDobj))
illogical(cannotBeAttachedMsg);
}
}
notAttachedMsg = BMsg(not attached, '{The subj dobj} {is}n\'t attached to
anything. ')
dobjFor(Detach)
{
verify()
{
/* We can't be detached if we're not attached to anything */
if(attachedToList.length == 0)
illogicalNow(notAttachedMsg);
/* We can't be detached if we're not detachable */
else if(!isDetachable)
implausible(cannotDetachMsg);
}
action()
{
for(local cur in attachedToList)
detachFrom(cur);
}
report() { say(okayDetachMsg); }
}
okayDetachMsg = BMsg(okay detach, '{I} detach{es/ed} {1}. ', gActionListStr)
dobjFor(DetachFrom)
{
verify()
{
/*
* We can't be detached from anything if we're not attached to
* anything.
*/
if(attachedToList.length == 0)
illogicalNow(notAttachedMsg);
/* We can't be detached from the iobj if we're not attached to it */
else if(!isAttachedTo(gVerifyIobj))
illogicalNow(notAttachedToThatMsg);
/* Carry out the inherited handling. */
inherited;
}
action()
{
detachFrom(gIobj);
}
report()
{
say(okayDetachFromMsg);
}
}
okayDetachFromMsg = BMsg(okay detach from, '{I} detach{es/ed} {1} from
{the iobj}. ', gActionListStr)
cannotDetachMsg = BMsg(cannot detach this, '{The subj dobj} {cannot} be
detached from {1}. ', location.theName)
iobjFor(DetachFrom)
{
verify()
{
/*
* Since we resolve the iobj first we can't tell whether the dobj
* is attached, but we can check whether anything at all is
* attached to this object.
*/
if(attachments.length == 0)
illogicalNow(nothingAttachedMsg);
/*
* Otherwise we can check whether our list of attachments overlaps with the list of
* tentative direct objects; if it does, we're probably a good choice of indirect
* object.
*/
else if(attachments.overlapsWith(gTentativeDobj))
logicalRank(120);
/* Carry out the inherited handling */
inherited;
}
}
cannotDetachFromMsg = BMsg(cannot detach from this , '{The {ubj dobj}
{can\'t} be detached from {the iobj}. ')
notAttachedToThatMsg = BMsg(not attached to that, '{The subj dobj} {isn\'t}
attached to {the iobj}. ')
nothingAttachedMsg = BMsg(nothing attached, 'There {dummy} {isn\'t} anything
attached to {the iobj}. ')
/* Treat Fasten and Unfasten as equivalent to Attach and Detach */
dobjFor(FastenTo) asDobjFor(AttachTo)
iobjFor(FastenTo) asIobjFor(AttachTo)
dobjFor(UnfastenFrom) asDobjFor(DetachFrom)
iobjFor(UnfastenFrom) asIobjFor(DetachFrom)
dobjFor(Unfasten) asDobjFor(Detach)
/*
* We can't take this object while it's attached. Note that this is
* assymetric: it applies only to the attached object (the one for which
* attachedTo != nil) not to the object it's attached to (which can be
* taken with the attached object still attached to it.
*/
dobjFor(Take)
{
preCond = [objDetached]
}
/*
* Check while any of my attachments object to my being moved while they
* are attached to me. If so, prevent the attempt to move me as the result
* of a player command.
*/
actionMoveInto(loc)
{
/*
* See if there's an object among our attachments that objects to our
* being moved while we're attached to it.
*/
local other = attachments.valWhich({o:
!o.allowOtherToMoveWhileAttached});
/*
* If there is, display a message saying we can't be moved while the
* object object is attached, then stop the action.
*/
if(other != nil)
{
sayCannotMoveWhileAttached(other);
exit;
}
/* Carry out the inherited handling */
inherited(loc);
}
/*
* Display a message saying we can't be moved while we're attached to
* other.
*/
sayCannotMoveWhileAttached(other)
{
gMessageParams(other);
DMsg(cannot move while attached, '{The subj cobj} {cannot} be moved
while {he cobj} {is} attached to {the other}. ');
}
cannotBeAttachedMsg = BMsg(cannot be attached, '{The subj dobj} {cannot} be
attached to {the iobj}. ')
/*
* By default I'm not listed as a separate object if I'm attached to
* something else.
*/
isListed = (attachedTo == nil && inherited)
/*
* Is obj attached to me? By default it is if it's in my list of
* attachements.
*/
isAttachedToMe(obj)
{
return attachments.indexOf(obj) != nil;
}
/*
* Is there an attachment relationship between myself and obj; there is
* either is obj is attached to me or if I'm attached to obj.
*/
isAttachedTo(obj)
{
return isAttachedToMe(obj) || attachedTo == obj;
}
/* Our locType is Attached if we're attached so something. */
locType()
{
if(attachedTo != nil)
return Attached;
else
return inherited;
}
/*
* If anything's attached to us, list our attachements when we're
* examined.
*/
examineStatus()
{
/* Carry out the inherited handling. */
inherited;
/* List our attachments, if we have any. */
if(attachments.length > 0)
attachmentLister.show(attachments, self);
}
/* The lister to be used for listing our attachments. */
attachmentLister = simpleAttachmentLister
/*
* If I'm attached, do I become firmly attached (so that I can't be
* removed without an explicit detachment)?
*/
isFirmAttachment = true
/*
* Allow detachment through a simple DETACH command. (If this is nil
* detachment might still be programatically possible, e.g. by UNSCREWing
* something).
*/
isDetachable = true
/*
* Determine whether the object I'm attached to can be moved while I'm
* attached to it. For a SimpleAttachable we normally do allow this, since
* I simply move with the other object.
*/
allowOtherToMoveWhileAttached = true
/* Preinitialize a SimpleAttachable */
preinitThing()
{
/* carry out the inherited handling */
inherited();
/* if I'm attached to anything, add me to its attachment list */
if(initiallyAttachedTo != nil)
{
/*
* Ensure that the object we're attached to has an attachements property defined as a
* list so we don't get a runtime error if our initiallyAttachedTo object isn't a
* SimpleAttachable, although it should be.)
*/
if(initiallyAttachedTo.attachments == nil)
initiallyAttachedTo.attachments = [];
/* Attach us to the other object. */
attachTo(initiallyAttachedTo);
}
}
;
/*
* An AttachableComponent is an item that effectively becomes a component of
* the object it's attached to, or is treated as a component if it starts out
* attached.
*/
class AttachableComponent: SimpleAttachable
/* A Component is firmly attached to its parent. */
isFirmAttachment = true
/* A Component's locType is PartOf while it's attached */
locType()
{
if(attachedTo != nil)
return PartOf;
else
return inherited;
}
/* Preinitialize a Component. */
preinitThing()
{
/* Carry out the inherited handling. */
inherited Thing;
/*
* If we start out initiallyAttached, note that we're attached to our
* location and add us to our location's list of attachments.
*/
if(initiallyAttached)
{
/* A Component is attached to its immediate location. */
attachedToList = [location];
/*
* It's possible that we're a component of something that isn't an
* Attachable and doesn't provide the attachments property; in
* which case, initialize its attachments property now.
*/
if(location.attachments == nil)
location.attachments = [];
/* Add ourselves to our locations list of attachments. */
location.attachments = location.attachments.appendUnique([self]);
}
}
/*
* We can't normally detach a Component with a straightforward DETACH
* command.
*/
isDetachable = nil
/*
* A Component is generally fixed in place (i.e. not separately takeable)
* if it's attached to something.
*/
isFixed = (attachedTo != nil)
/*
* Assume that most components start out attached to their containers
*/
initiallyAttached = true
cannotTakeMsg = (delegated Component)
;
/*
* A NearbyAttachable is (optionally) placed in the same location as the
* object to which it is attached, and moves with the object it's attached to
* (or, alternatively, can prevent the other object being moved while it's
* attached to it).
*/
class NearbyAttachable: SimpleAttachable
/*
* Our location when attached; by default this is the location of the item
* we're attached to (if there is one)
*/
attachedLocation = (attachedTo == nil ? location : attachedTo.location)
/*
* Our location when detached; by default this is simply the location of
* the item to which we're attached, if there is one.
*/
detachedLocation = (attachedTo == nil ? location : attachedTo.location)
/*
* Before any action takes place when we're in scope, make a note of our
* current location if we're attached to anything
*/
beforeAction()
{
if(attachedTo != nil)
oldLocation = location;
}
/*
* After any action takes place when we're attached to something, move us
* into our attachedLocation if we're not already there.
*/
afterAction()
{
if(attachedTo != nil && attachedLocation != oldLocation)
moveInto(attachedLocation);
}
/*
* Our location just before an action takes place when we're attached to
* something.
*/
oldLocation = nil
;
/*
* An Attachable is a NearbyAttachable that can be attached to more than one
* thing at a time, like a length of cable connecting two devices.
*/
class Attachable: NearbyAttachable
/*
* The maximum number of things I can be attached to at once. By default
* this is 2, since probably the most commonly use for an Attachable is to
* join or link two other things, but this can easily be overridden as
* required. If you want there to be no limit to the number of things I
* can be attached to at once, make maxAttachedTo nil.
*/
maxAttachedTo = 2
/*
* Since an ATTACHABLE could potentially be in a many-to-many
* relationship, we may sometimes want to control the order of connection
* (i.e. which is considered to be the connected object and which the
* object it's connected to). If reverseConnect(obj) returns true then
* we'll turn CONNECT obj TO self into CONNECT self TO obj.
*/
reverseConnect(obj)
{
return nil;
}
/*
* We allow attachment to another obj either for the inherited reason
* (that obh is in my list of allowable attachements) or, if we want to
* reverse the connection with obj, that obj can be attached to us.
*/
allowAttach(obj)
{
return inherited(obj)
|| (reverseConnect(obj) && obj.allowAttach(self));
}
dobjFor(AttachTo)
{
preCond = [touchObj]
verify()
{
inherited Thing;
if(isAttachedTo(gVerifyIobj))
{
illogicalNow(alreadyAttachedToIobjMsg);
}
else if(maxAttachedTo != nil && attachedToList.length >= maxAttachedTo)
illogical(cannotAttachToMoreMsg);
}
}
alreadyAttachedToIobjMsg = BMsg(alreadt attached to iobj, '{The subj dobj} {is} already
attachd to {1}. ', gVerifyIobj.theName)
/*
* I'm attached to obj in the broad sense of having an attachement
* relationship with obj either if obj is attached to me or if obj is in
* the list of things to which I'm attached.
*/
isAttachedTo(obj)
{
return isAttachedToMe(obj) || attachedToList.indexOf(obj);
}
/*
* By default an Attachable can be plugged into more than one thing at a
* time
*/
multiPluggable = true
;
reverseAttachableDoer: Doer 'attach SimpleAttachable to Attachable'
execAction(c)
{
if(gIobj.reverseConnect(gDobj))
doInstead(Attach, gIobj, gDobj);
else
inherited(c);
}
;
/*
* PlugAttachable is a mix-in class for use in conjunction with either
* SimpleAttachable or NearbyAttachable, enabling the commands PLUG X INTO Y,
* UNPLUG X FROM Y, PLUG X IN and UNPLUG X, treating ATTACH and DETACH
* commands as equivalent to these, and describing an object's attachments as
* being plugged into it.
*/
class PlugAttachable: object
/* A PlugAttachable can be plugged into things. */
isPlugable = true
/* A PlugAttachable can have other things plugged into it. */
canPlugIntoMe = true
/*
* Objects attached to this object should be described as plugged into it,
* so we need to use the appropriate lister.
*/
attachmentLister = plugAttachableLister
/*
* Plugable objects could either be implemented so that an explicit socket
* needs to be specified (e.g. PLUG CABLE INTO SOCKET) or so that the
* socket can be left unspecified (e.g. PLUG TV IN). For the former case,
* make this property true; for the latter, make it nil.
*/
needsExplicitSocket = true
/* Is this item plugged in to anything? */
isPluggedIn = nil
/*
* If this object represents the socket side of a plug-and-socket
* relationship, then the socketCapacity defines the total number of items
* that can be plugged into it once. By default we'll assume that a socket
* can only have one thing plugged into it at a time, but this can readily
* be overridded for items that can take more.
*/
socketCapacity = 1
/* Note whether we're plugged our unplugged. */
makePlugged(stat)
{
isPluggedIn = stat;
}
dobjFor(PlugInto)
{
verify()
{
/* Carry out the inherited handling. */
inherited;
/* We can't be plugged in if we're already plugged in. */
if(isPluggedIn && !multiPluggable)
illogicalNow(alreadyAttachedMsg);
}
action()
{
/*
* Carry out the action to attach us to the object we're being
* attached to.
*/
actionDobjAttachTo();
/* Note that we're now plugged in. */
makePlugged(true);
}
report() { reportDobjAttachTo(); }
}
okayAttachMsg = BMsg(okay plug, '{I} plug{s/?ed} {1} into {the iobj}. ',
gActionListStr)
alreadyAttachedMsg = BMsg(already plugged in, '{The subj dobj} {is} already
plugged into {1}. ', attachedTo.theName)
alreadyPluggedInMsg = BMsg(already plugged in vague, '{The subj {dobj} {is}
already plugged in. ')
iobjFor(PlugInto)
{
preCond = [touchObj]
verify()
{
/* Carry out the inherited handling. */
inherited;
/*
* If the direct object is not one that can be plugged into us,
* rule out the action with an appropriate message.
*/
if(!allowAttach(gVerifyDobj))
illogical(cannotBeAttachedMsg);
}
check()
{
/*
* If plugging anything else into us would exceed our
* socketCapacity, rule out the action with an appropriate
* message,
*/
if(attachments.length >= socketCapacity)
say(cannotPlugInAnyMoreMsg);
}
}
cannotPlugInAnyMoreMsg = BMsg(cannot plug in any more, '{I} {can\'t} plug
any more into {the iobj}. ')
iobjFor(AttachTo)
{
check()
{
/* Carry out the inherited handling. */
inherited;
/*
* Make sure we don't exceed our socketCapacity if the player uses
* ATTACH TO rather than PLUG INTO; use the check method for
* PlugInto.
*/
checkIobjPlugInto();
}
}
cannotBeAttachedMsg = BMsg(cannot be plugged in, '{The subj dobj} {can\'t}
be plugged into {the iobj}. ')
dobjFor(UnplugFrom)
{
verify()
{
/* Carry out the inherited checks */
inherited;
/* If we're not plugged in we can't be unplugged from anything. */
if(!isPluggedIn)
illogicalNow(notAttachedMsg);
/*
* If we're not attached to the direct object of the command, we
* can't be unplugged from it.
*/
else if(attachedTo != gVerifyIobj)
illogicalNow(notAttachedToThatMsg);
}
action()
{
/* Carry out the action handling for detaching from. */
actionDobjDetachFrom();
/* Note that we're no longer plugged in to anything. */
makePlugged(nil);
}
report() { reportDobjDetachFrom(); }
}
okayDetachFromMsg = BMsg(okay unplug from, '{I} unplug{s/?ed} {1} from
{the iobj}. ', gActionListStr)
notAttachedMsg = BMsg(not plugged in, '{The subj dobj} {isn\'t} plugged into
anything. ')
notAttachedToThatMsg = BMsg(not plugged into that, '{The subj dobj} {isn\'t}
plugged into {the iobj}. ')
dobjFor(Unplug)
{
verify()
{
/* Carry out the inherited checks. */
inherited;
/* If we're not plugged into anything, we can't be unplugged. */
if(!isPluggedIn)
illogicalNow(notAttachedMsg);
}
action()
{
/* Note that we're no longer plugged in. */
makePlugged(nil);
/*
* If plugging/unplugging this item requires an explicit socket to
* plug into/unplug from, then detach this item from whatever it's
* currently attached to.
*/
if(needsExplicitSocket)
actionDobjDetach();
}
report() { say(okayDetachMsg); }
}
okayDetachMsg = BMsg(okay unplug, '{I} unplug{s/?ed} {1}. ', gActionListStr)
dobjFor(PlugIn)
{
verify()
{
/* Carry out the inherited handling. */
inherited;
/*
* If we're already plugged in we can't be plugged in now, but the
* message to display depends on whether we require a specific
* socket to be plugged into.
*/
if(isPluggedIn)
illogicalNow(needsExplicitSocket ? alreadyAttachedMsg :
alreadyPluggedInMsg);
}
action()
{
/*
* If we need to specify a specific socket for this item to be
* plugged into, convert this action into a PlugInto action and
* ask for its indirect object (i.e. the socket to plug into).
*/
if(needsExplicitSocket)
askForIobj(PlugInto);
/* Otherwise simply note that we're now plugged in. */
else
makePlugged(true);
}
report() { DMsg(okay plug in, '{I} plug{s/?ed} in {1}. ', gActionListStr); }
}
;
Adv3Lite Library Reference Manual
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