Copyright (C) 1994, Digital Equipment Corp.
Digital Internal Use Only
Created on Sat Mar 5 19:17:45 PST 1994 by najork
MODULE ObVectorLightGO;
IMPORT LightGO, ObAux, ObColorProp, ObCommand, ObGO, ObLib, ObLightGO,
ObPointProp, ObProp, ObProtoLoader, ObValue, Obliq, ProxiedObj,
SynLocation, VectorLightGO, VectorLightGOProxy;
CONST
pkgname = "VectorLightGO";
***************************************************************************
Wrapper for VectorLightGO.T
***************************************************************************
TYPE
T = ObLightGO.T BRANDED "ObVectorLightGO.T" OBJECT END;
PROCEDURE AddTObj (light : VectorLightGO.T) =
<* FATAL ObValue.Error, ObValue.Exception *>
BEGIN
WITH obj = Obliq.ObjectClone (Obliq.Vals {TProto}),
raw = NEW (T, what := "<a VectorLightGO.T>", po := light) DO
Obliq.ObjectUpdate (obj, "raw", raw);
light.proxy := NEW (ProxiedObj.Proxy, obj := obj);
END;
END AddTObj;
***************************************************************************
Setup procedures
***************************************************************************
PROCEDURE SetupPackage () =
PROCEDURE NewOpCode (name : TEXT; arity : INTEGER; code : Code) : OpCode =
BEGIN
RETURN NEW (OpCode, name := name, arity := arity, code := code);
END NewOpCode;
TYPE
OpCodes = ARRAY OF ObLib.OpCode;
VAR
opCodes: REF OpCodes;
BEGIN
opCodes := NEW (REF OpCodes, NUMBER (Code));
opCodes^ :=
OpCodes {
NewOpCode ("New", 2, Code.New),
NewOpCode ("Direction", -1, Code.Direction),
NewOpCode ("SetDirection", 2, Code.SetDirection)
};
ObLib.Register (NEW (Package, name := pkgname, opCodes := opCodes));
ObLib.RegisterHelp (pkgname, Help);
END SetupPackage;
VAR
TProto : ObValue.Val;
PROCEDURE SetupModule (loader : ObProtoLoader.T) =
BEGIN
(*** Retrieve the prototype ***)
loader.load ("VectorLightGO.obl");
TProto := loader.get ("VectorLightGO_TProto");
(*** Register the proxy maker ***)
VectorLightGOProxy.MkProxyT := AddTObj;
END SetupModule;
***************************************************************************
Execution machinery
***************************************************************************
TYPE
Code = {New, Direction, SetDirection};
OpCode = ObLib.OpCode OBJECT
code: Code;
END;
Package = ObLib.T OBJECT
OVERRIDES
Eval := DoEval;
END;
PROCEDURE DoEval (self : Package;
opCode : ObLib.OpCode;
<* UNUSED *> arity : ObLib.OpArity;
READONLY args: ObValue.ArgArray;
<* UNUSED *> temp : BOOLEAN;
loc : SynLocation.T) : ObValue.Val
RAISES {ObValue.Error, ObValue.Exception} =
BEGIN
CASE NARROW (opCode, OpCode).code OF
| Code.New =>
WITH color = ObColorProp.GetOverloadedVal (args, 1, self, opCode, loc),
dir = ObPointProp.GetOverloadedVal (args, 2, self, opCode, loc),
light = NEW (VectorLightGO.T).init () DO
light.setProp (LightGO.Colour.bind (color));
light.setProp (VectorLightGO.Direction.bind (dir));
RETURN light.proxy.obj;
END;
| Code.Direction =>
RETURN ObProp.NameToObliq (VectorLightGO.Direction);
| Code.SetDirection =>
WITH go = ObGO.GetArg (args, 1, self, opCode, loc),
dir = ObPointProp.GetOverloadedVal (args, 2, self, opCode, loc) DO
go.setProp (VectorLightGO.Direction.bind (dir));
RETURN ObValue.valOk;
END;
END;
END DoEval;
***************************************************************************
Help
***************************************************************************
PROCEDURE Help (self : ObCommand.T; arg : TEXT; <* UNUSED *> data : REFANY) =
BEGIN
ObAux.Help (self, arg, pkgname);
END Help;
BEGIN
END ObVectorLightGO.