Copyright (C) 1994, Digital Equipment Corp.
Created on Tue Jan 19 14:00:00 PST 1994 by najork
MODULE ObLineGO;
IMPORT LineGO, LineGOProxy, ObAux, ObColorProp, ObCommand, ObGO, ObLib,
ObLineTypeProp, ObPointProp, ObProp, ObProtoLoader, ObRealProp, ObValue,
Obliq, ProxiedObj, SynLocation;
CONST
pkgname = "LineGO";
***************************************************************************
Wrapper for LineGO.T
***************************************************************************
TYPE
T = ObGO.T BRANDED "ObLineGO.T" OBJECT END;
PROCEDURE AddTObj (line : LineGO.T) =
<* FATAL ObValue.Error, ObValue.Exception *>
BEGIN
WITH obj = Obliq.ObjectClone (Obliq.Vals {TProto}),
raw = NEW (T, what := "<a LineGO.T>", po := line) DO
Obliq.ObjectUpdate (obj, "raw", raw);
line.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 ("Color", -1, Code.Color),
NewOpCode ("Width", -1, Code.Width),
NewOpCode ("Type", -1, Code.Type),
NewOpCode ("Point1", -1, Code.Point1),
NewOpCode ("Point2", -1, Code.Point2),
NewOpCode ("SetColor", 2, Code.SetColor),
NewOpCode ("SetWidth", 2, Code.SetWidth),
NewOpCode ("SetType", 2, Code.SetType),
NewOpCode ("SetPoint1", 2, Code.SetPoint1),
NewOpCode ("SetPoint2", 2, Code.SetPoint2)
};
ObLib.Register (NEW (Package, name := pkgname, opCodes := opCodes));
ObLib.RegisterHelp (pkgname, Help);
(* DONT KNOW YET WHETHER TO INHIBIT TRANSMISSIONS ... *)
END SetupPackage;
VAR
TProto : ObValue.Val;
PROCEDURE SetupModule (loader : ObProtoLoader.T) =
BEGIN
(*** Retrieve the prototype ***)
loader.load ("LineGO.obl");
TProto := loader.get ("LineGO_TProto");
(*** Register the proxy maker ***)
LineGOProxy.MkProxyT := AddTObj;
END SetupModule;
***************************************************************************
Execution machinery
***************************************************************************
TYPE
Code = {New, Color, Width, Type, Point1, Point2,
SetColor, SetWidth, SetType, SetPoint1, SetPoint2};
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 p1 = ObPointProp.GetOverloadedVal (args, 1, self, opCode, loc),
p2 = ObPointProp.GetOverloadedVal (args, 2, self, opCode, loc),
line = NEW (LineGO.T).init () DO
line.setProp (LineGO.Point1.bind (p1));
line.setProp (LineGO.Point2.bind (p2));
RETURN line.proxy.obj;
END;
| Code.Color =>
RETURN ObProp.NameToObliq (LineGO.Colour);
| Code.Width =>
RETURN ObProp.NameToObliq (LineGO.Width);
| Code.Type =>
RETURN ObProp.NameToObliq (LineGO.Type);
| Code.Point1 =>
RETURN ObProp.NameToObliq (LineGO.Point1);
| Code.Point2 =>
RETURN ObProp.NameToObliq (LineGO.Point2);
| Code.SetColor =>
WITH go = ObGO.GetArg (args, 1, self, opCode, loc),
col = ObColorProp.GetOverloadedVal (args, 2, self, opCode, loc) DO
go.setProp (LineGO.Colour.bind (col));
RETURN ObValue.valOk;
END;
| Code.SetWidth =>
WITH go = ObGO.GetArg (args, 1, self, opCode, loc),
r = ObRealProp.GetOverloadedVal (args, 2, self, opCode, loc) DO
go.setProp (LineGO.Width.bind (r));
RETURN ObValue.valOk;
END;
| Code.SetType =>
WITH go= ObGO.GetArg (args, 1, self, opCode, loc),
k = ObLineTypeProp.GetOverloadedVal(args, 2, self, opCode, loc) DO
go.setProp (LineGO.Type.bind (k));
RETURN ObValue.valOk;
END;
| Code.SetPoint1 =>
WITH go = ObGO.GetArg (args, 1, self, opCode, loc),
p = ObPointProp.GetOverloadedVal (args, 2, self, opCode, loc) DO
go.setProp (LineGO.Point1.bind (p));
RETURN ObValue.valOk;
END;
| Code.SetPoint2 =>
WITH go = ObGO.GetArg (args, 1, self, opCode, loc),
p = ObPointProp.GetOverloadedVal (args, 2, self, opCode, loc) DO
go.setProp (LineGO.Point2.bind (p));
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 ObLineGO.