Copyright (C) 1994, Digital Equipment Corp.
Digital Internal Use Only
Created on Sat May 28 20:08:51 PDT 1994 by najork
MODULE ObAnimHandle;
IMPORT AnimHandle, AnimHandleProxy, ObAux, ObCommand, ObLib, ObProtoLoader,
ObProxiedObj, ObValue, Obliq, ProxiedObj, SynLocation;
CONST
pkgname = "AnimHandle";
***************************************************************************
Wrapper for AnimHandle.T
***************************************************************************
TYPE
T = ObProxiedObj.T BRANDED OBJECT END;
PROCEDURE AddTObj (ah : AnimHandle.T) =
<* FATAL ObValue.Error, ObValue.Exception *>
BEGIN
WITH obj = Obliq.ObjectClone (Obliq.Vals {TProto}),
raw = NEW (T, what := "<an AnimHandle.T>", po := ah) DO
Obliq.ObjectUpdate (obj, "raw", raw);
ah.proxy := NEW (ProxiedObj.Proxy, obj := obj);
END;
END AddTObj;
PROCEDURE GetT (args : ObValue.ArgArray;
idx : INTEGER;
package : ObLib.T;
opCode : ObLib.OpCode;
loc : SynLocation.T) : AnimHandle.T
RAISES {ObValue.Error, ObValue.Exception} =
BEGIN
WITH raw = Obliq.ObjectSelect (args[idx], "raw") DO
TYPECASE raw OF
| T (node) =>
RETURN node.po;
ELSE
ObValue.BadArgType (idx, pkgname, package.name, opCode.name, loc);
RETURN NIL; (* ... only to suppress compiler warning *)
END;
END;
END GetT;
***************************************************************************
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 := NEW (REF OpCodes, NUMBER (Code));
BEGIN
opCodes^ :=
OpCodes {
NewOpCode ("New", 0, Code.New),
NewOpCode ("Animate", 1, Code.Animate)
};
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 ("AnimHandle.obl");
TProto := loader.get ("AnimHandle_TProto");
(*** Register the proxy makers ***)
AnimHandleProxy.MkProxyT := AddTObj;
END SetupModule;
***************************************************************************
Execution machinery
***************************************************************************
TYPE
Code = {New, Animate};
OpCode = ObLib.OpCode BRANDED OBJECT
code: Code;
END;
Package = ObLib.T BRANDED 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 val = AnimHandle.New () DO
RETURN val.proxy.obj;
END;
| Code.Animate =>
WITH ah = GetT (args, 1, self, opCode, loc) DO
ah.animate ();
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 ObAnimHandle.