DIRECTORY
CD,
CDInstances,
CDBasics,
CDLayers USING [MakeAbstract],
CDLRUCache,
CDImports,
CDIOExtras,
CDOps,
CDOrient,
CDSymbolicObjects,
CDPrivate,
CDProperties,
CDRects,
Imager,
ImagerPath,
Rope;

CDSymbolicObjectsImpl: CEDAR MONITOR    
IMPORTS CD, CDInstances, CDBasics, CDLayers, CDLRUCache, CDIOExtras, CDOps, CDOrient, CDPrivate, CDProperties, CDRects, Imager, ImagerPath, Rope
EXPORTS CDSymbolicObjects
SHARES CDLayers =   
BEGIN

symNameProp: ATOM = $SignalName;
symLayerProp: ATOM = $layerOfPin; 
symOwnerProp: ATOM = $ownerOfPin; 

markObject: CD.Object;
markObjectPath: ImagerPath.Trajectory = CreateMarkObjectPath[];

dummySpecific: REF SymRec = NEW[SymRec];
SymRec: TYPE = RECORD [dummy: INT _ 17];

pinLayer: PUBLIC CD.Layer _ CD.NewLayer[NIL, $pinRepresentation];
segmentLayer: PUBLIC CD.Layer _ CD.NewLayer[NIL, $segmentRepresentation];
markLayer: CD.Layer _ CD.combined;

pinCache: CDLRUCache.LRUCache = CDLRUCache.Create[size: 17, newProc: NewPin];
segmentCache: CDLRUCache.LRUCache = CDLRUCache.Create[size: 17, newProc: NewSegment];

pinClass: PUBLIC REF CD.ObjectClass _ CD.RegisterObjectClass[$PinOb0];
segmentClass: PUBLIC REF CD.ObjectClass _ CD.RegisterObjectClass[$SymbolicSegment];
markClass: PUBLIC REF CD.ObjectClass _ CD.RegisterObjectClass[$AlignmentMarkOb];

NewPin: PROC [] RETURNS [CD.Object] = {
ob: CD.Object _ NEW[CD.ObjectRep];
ob.specificRef _ dummySpecific;
ob.layer _ pinLayer;
ob.class _ pinClass;
RETURN [ob]
};

NewSegment: PROC [] RETURNS [CD.Object] = {
ob: CD.Object _ NEW[CD.ObjectRep];
ob.specificRef _ dummySpecific;
ob.layer _ segmentLayer;
ob.class _ segmentClass;
RETURN [ob]
};

CreateMarkObjectPath: PROC [] RETURNS [markObjectPath: ImagerPath.Trajectory] =
BEGIN
markObjectPath _ ImagerPath.MoveTo[[0, 0]];
markObjectPath _ ImagerPath.LineTo[markObjectPath, [0, 3]];
markObjectPath _ ImagerPath.LineTo[markObjectPath, [1, 2]];
markObjectPath _ ImagerPath.LineTo[markObjectPath, [3, 4]];
markObjectPath _ ImagerPath.LineTo[markObjectPath, [4, 3]];
markObjectPath _ ImagerPath.LineTo[markObjectPath, [2, 1]];
markObjectPath _ ImagerPath.LineTo[markObjectPath, [3, 0]];
markObjectPath _ ImagerPath.LineTo[markObjectPath, [0, 0]];
END;

Init: PROC [] =
BEGIN
CDLayers.MakeAbstract[pinLayer];
pinClass.drawMe _ pinClass.quickDrawMe _ DrawPin;
pinClass.showMeSelected _ ShowSelectedSymRL;
pinClass.internalRead _ ReadPin;
pinClass.internalWrite _ WritePinOrSegment;
pinClass.wireTyped _ TRUE;
pinClass.symbolic _ TRUE;
pinClass.description _ "pin";
pinClass.describeInst _ DescribeInstance;
CDRects.UseAsCreateRect[pinLayer, RCreatePin, pinClass];
CDLayers.MakeAbstract[segmentLayer];
segmentClass.drawMe _ segmentClass.quickDrawMe _ DrawSegment;
segmentClass.showMeSelected _ ShowSelectedSymRL;
segmentClass.internalRead _ ReadSegment;
segmentClass.internalWrite _ WritePinOrSegment;
segmentClass.wireTyped _ TRUE;
segmentClass.symbolic _ TRUE;
segmentClass.description _ "segment";
segmentClass.describeInst _ DescribeInstance;
CDRects.UseAsCreateRect[segmentLayer, RCreateSegment, segmentClass];
markClass.drawMe _ markClass.quickDrawMe _ DrawMark;
markClass.internalWrite _ WriteMark;
markClass.internalRead _ ReadMark;
markClass.description _ "mark";
markClass.symbolic _ TRUE;
markObject _ NEW[CD.ObjectRep _ [
class: markClass,
size: [4, 4],
layer: markLayer,
specificRef: $AlignmentMarkOb
]];
[] _ CDProperties.RegisterProperty[symLayerProp, $layer];
[] _ CDProperties.RegisterProperty[symOwnerProp, $atom];
CDProperties.InstallProcs[prop: symOwnerProp, new: [makeCopy: CDProperties.CopyVal]];
CDProperties.InstallProcs[prop: symLayerProp, new: [makeCopy: CDProperties.CopyVal]];
END; 


CreateMark: PUBLIC PROC [dummySize: CD.Number_0] RETURNS [CD.Object] =
BEGIN
RETURN [markObject]
END;

CreateSegment: PUBLIC PROC [length: CD.Number, dummyWidth: CD.Number_0] RETURNS [CD.Object] =
BEGIN
ob: CD.Object = segmentCache.UnusedOrNew[];
size: CD.Position;
IF dummyWidth<=0 THEN dummyWidth _ 8;
size _ [dummyWidth, length];
ob.size _ CDBasics.MaxPoint[size, [1, 1]];
RETURN [segmentCache.ReplaceByAequivalent[ob]];
END;

RCreateSegment: PROC [size: CD.Position, l: CD.Layer] RETURNS [CD.Object] =
BEGIN 
RETURN [CreateSegment[size.y, size.x]]
END;

CreatePin: PUBLIC PROC [size: CD.Position] RETURNS [CD.Object] =
BEGIN
ob: CD.Object = pinCache.UnusedOrNew[];
ob.size _ CDBasics.MaxPoint[size, [1, 1]];
RETURN [pinCache.ReplaceByAequivalent[ob]];
END;

RCreatePin: PROC [size: CD.Position, l: CD.Layer] RETURNS [CD.Object] =
BEGIN 
RETURN [CreatePin[size]]
END;


IsSymbolicOb: PUBLIC PROC [ob: CD.Object] RETURNS [BOOL] = {
RETURN [ob.class=markClass OR ob.class=segmentClass OR ob.class=pinClass]
};

IsMark: PUBLIC PROC [ob: CD.Object] RETURNS [BOOL] = {
RETURN [ob.class=markClass]
};

IsSegment: PUBLIC PROC [ob: CD.Object] RETURNS [BOOL] = {
RETURN [ob.class=segmentClass]
};

IsPin: PUBLIC PROC [ob: CD.Object] RETURNS [BOOL] = {
RETURN [ob.class=pinClass]
};

SymbolicKind: PUBLIC PROC [ob: CD.Object] RETURNS [k: CDSymbolicObjects.Kind] = {
SELECT TRUE FROM
ob.class=pinClass => k _ pin;
ob.class=segmentClass => k _ segment;
ob.class=markClass => k _ mark;
ENDCASE => k _ notSymbolic
};


SetOwner: PUBLIC PROC [symInst: CD.Instance, owner: ATOM_NIL] =
BEGIN
IF IsSymbolicOb[symInst.ob] THEN 
CDProperties.PutPropOnInstance[symInst, symOwnerProp, owner]
END;

GetOwner: PUBLIC PROC [symInst: CD.Instance] RETURNS [at: ATOM] =
BEGIN
WITH CDProperties.GetPropFromInstance[symInst, symOwnerProp] SELECT FROM
a: ATOM => at _ a
ENDCASE => at _ NIL
END;

SetName: PUBLIC PROC [symInst: CD.Instance, name: Rope.ROPE] =
BEGIN
IF IsSymbolicOb[symInst.ob] THEN 
CDProperties.PutPropOnInstance[symInst, symNameProp, name]
END;

GetName: PUBLIC PROC [symInst: CD.Instance] RETURNS [r: Rope.ROPE _ NIL] =
BEGIN
IF IsSymbolicOb[symInst.ob] THEN {
WITH CDProperties.GetPropFromInstance[symInst, symNameProp] SELECT FROM
n: Rope.ROPE => r _ n;
rt: REF READONLY TEXT => r _ Rope.FromRefText[rt];
ENDCASE => NULL;
}
END;

SetLayer: PUBLIC PROC [symInst: CD.Instance, layer: CD.Layer] =
BEGIN
IF IsSymbolicOb[symInst.ob] THEN 
CDProperties.PutPropOnInstance[symInst, symLayerProp, CDPrivate.layers[layer]]
END;

GetLayer: PUBLIC PROC [symInst: CD.Instance] RETURNS [layer: CD.Layer] =
BEGIN
WITH CDProperties.GetPropFromInstance[symInst, symLayerProp] SELECT FROM
lp: CDPrivate.LayerRef => layer _ lp^.number
ENDCASE => layer _ CD.combined
END;

DirectionFromOrient: PUBLIC PROC [o: CD.Orientation] RETURNS [dir: CDSymbolicObjects.Direction] =
BEGIN
SELECT o FROM
CDOrient.original, CDOrient.rotate180X => dir _ west;
CDOrient.rotate90, CDOrient.rotate90X => dir _ south;
CDOrient.rotate180, CDOrient.mirrorX => dir _ east;
CDOrient.rotate270, CDOrient.rotate270X => dir _ north;
ENDCASE => ERROR;
END;

OrientFromDirection: PUBLIC PROC [dir: CDSymbolicObjects.Direction] RETURNS [o: CD.Orientation] =
BEGIN
SELECT dir FROM
west => o _ CDOrient.original;
south => o _ CDOrient.rotate90;
east => o _ CDOrient.rotate180;
north => o _ CDOrient.rotate270;
ENDCASE => ERROR;
END;


CreateSymInst: PUBLIC PROC [name: Rope.ROPE, denotes: CD.Rect, dummySize: CD.Number, layer: CD.Layer, owner: ATOM, approachFrom: CDSymbolicObjects.Direction] RETURNS [symInst: CD.Instance] =
BEGIN
symOb: CD.Object;
orient: CD.Orientation _ OrientFromDirection[approachFrom];
loc: CD.Position;
denotes _ CDBasics.NormalizeRect[denotes];
IF denotes.x1#denotes.x2 AND denotes.y1#denotes.y2 THEN {
loc _ CDBasics.BaseOfRect[denotes];
symOb _ CreatePin[CDOrient.OrientedSize[CDBasics.SizeOfRect[denotes], orient]]; 
}
ELSE IF denotes.x1=denotes.x2 AND denotes.y1=denotes.y2 THEN {
p: CD.Position;
symOb _ CreateMark[dummySize]; 
p _ CDOrient.MapPoint[
pointInCell: [0, 0],
cellSize: symOb.size,
cellInstOrient: orient,
cellInstPos: [0, 0]
];
loc _ [x: denotes.x1-p.x, y: denotes.y1-p.y];
}
ELSE {
l: CD.Number;
IF denotes.x1=denotes.x2 THEN {
l _ denotes.y2-denotes.y1;
IF approachFrom=south OR approachFrom=north THEN {
approachFrom _ west;
orient _ OrientFromDirection[approachFrom];
}
}
ELSE {
l _ denotes.x2-denotes.x1;
IF approachFrom=west OR approachFrom=east THEN {
approachFrom _ south;
orient _ OrientFromDirection[approachFrom];
}
};
symOb _ CreateSegment[length: l, dummyWidth: dummySize]; 
loc _ CDBasics.BaseOfRect[denotes];
SELECT approachFrom FROM
west, south => NULL;
east => loc.x _ loc.x-symOb.size.x; 
north => loc.y _ loc.y-symOb.size.x;
ENDCASE => ERROR;
};
symInst _ CDInstances.NewInstance[ob: symOb, location: loc, orientation: orient];
IF name#NIL THEN SetName[symInst, name];
IF layer#CD.combined THEN SetLayer[symInst, layer];
IF owner#NIL THEN SetOwner[symInst, owner];
END;

Denotes: PUBLIC PROC [symInst: CD.Instance] RETURNS [CD.Rect] =
BEGIN
itemInCell: CD.Rect; 
SELECT TRUE FROM
symInst.ob.class=pinClass => itemInCell _ [x1: 0, y1: 0, x2: symInst.ob.size.x, y2: symInst.ob.size.y];
symInst.ob.class=segmentClass => itemInCell _ [x1: 0, y1: 0, x2: 0, y2: symInst.ob.size.y];
symInst.ob.class=markClass => itemInCell _ [0, 0, 0, 0];
ENDCASE => ERROR;
RETURN [CDOrient.MapRect[
itemInCell: itemInCell,
cellInstPos: symInst.location,
cellSize: symInst.ob.size, 
cellInstOrient: symInst.orientation
]]
END;
EnumerateSymbolicObs: PUBLIC PROC [cellOb: CD.Object_NIL, eachInst: CDSymbolicObjects.InstEnumerator] RETURNS [quit: BOOL_FALSE] =
BEGIN
cp: CD.CellPtr;
WITH cellOb.specificRef SELECT FROM
c: CD.CellPtr => cp _ c;
ip: CDImports.ImportPtr => { -- HACK? until imports handle symbolic objects more reasonably
IF ip.boundInstance=NIL THEN RETURN [TRUE];
quit _ EnumerateSymbolicObs[ip.boundInstance.ob, eachInst];
RETURN
};
ENDCASE => RETURN [TRUE];
FOR list: CD.InstanceList _ cp.contents, list.rest WHILE (list#NIL AND ~quit) DO
IF IsSymbolicOb[list.first.ob] THEN {
quit _ eachInst[list.first]; -- do NOT catch errors
};
ENDLOOP;
END;

FindSymbolicObs: PUBLIC PROC [cellOb: CD.Object_NIL, name: Rope.ROPE] RETURNS [il: CD.InstanceList_NIL]=
BEGIN
Enumerate: CDSymbolicObjects.InstEnumerator = {
IF Rope.Equal[GetName[inst], name] THEN il _ CONS[inst, il];
};
[] _ EnumerateSymbolicObs[cellOb, Enumerate];
END;

WritePinOrSegment: CD.InternalWriteProc -- PROC [me: Object] -- =
BEGIN
CDIOExtras.WritePos[me.size];
END;

WriteMark: CD.InternalWriteProc --PROC [me: Object]-- = {};

ReadPin: CD.InternalReadProc --PROC [] RETURNS [Object]-- =
BEGIN
RETURN [CreatePin[CDIOExtras.ReadPos[]]]
END;

ReadSegment: CD.InternalReadProc --PROC [] RETURNS [Object]-- =
BEGIN
p: CD.Position _ CDIOExtras.ReadPos[];
RETURN [CreateSegment[p.y, p.x]]
END;

ReadMark: CD.InternalReadProc --PROC [] RETURNS [Object]-- = {RETURN [markObject]};

DescribeInstance: PROC[i: CD.Instance] RETURNS [Rope.ROPE] =
BEGIN
RETURN [Rope.Cat[CDOps.LayerName[GetLayer[i]], " ", i.ob.class.description]];
END;

ShowSelectedSymRL: PROC [inst: CD.Instance, pos: CD.Position, 
orient: CD.Orientation, pr: CD.DrawRef] =
BEGIN
pr.drawRect[CDOrient.RectAt[pos, inst.ob.size, orient], CD.highLightShade, pr]
END;

DrawPin: PROC [inst: CD.Instance, pos: CD.Position, orient: CD.Orientation,
pr: CD.DrawRef] =
BEGIN

DrawPinInContext: PROC [context: Imager.Context, ob: CD.Object, layer: CD.Layer] =
BEGIN
Imager.MaskVector[context, [0, 0], [ob.size.x, ob.size.y]];
Imager.MaskVector[context, [0, ob.size.y], [ob.size.x, 0]];
END;

IF pr.symbolics AND (pr.scaleHint*MIN[inst.ob.size.y, inst.ob.size.x]>3 OR pr.scaleHint<=0) THEN {
pr.drawContext[pr, DrawPinInContext, inst.ob, pos, orient, pinLayer];
pr.drawComment[r: CDOrient.RectAt[pos, inst.ob.size, orient], comment: GetName[inst], pr: pr]
}
END; 

DrawSegment: PROC [inst: CD.Instance, pos: CD.Position, orient: CD.Orientation,
pr: CD.DrawRef] =
BEGIN

DrawSegmentInContext: PROC [context: Imager.Context, ob: CD.Object, layer: CD.Layer] =
BEGIN
Imager.MaskVector[context, [0, 0], [0, ob.size.y]];
Imager.MaskVector[context, [0, 0], [ob.size.x, ob.size.y/2]];
Imager.MaskVector[context, [0, ob.size.y], [ob.size.x, ob.size.y/2]];
END;

IF pr.symbolics AND (pr.scaleHint*inst.ob.size.y>3 OR pr.scaleHint<=0) THEN {
pr.drawContext[pr, DrawSegmentInContext, inst.ob, pos, orient, segmentLayer];
pr.drawComment[r: CDOrient.RectAt[pos, inst.ob.size, orient], comment: GetName[inst], pr: pr]
}
END; 

DrawMark: PROC [inst: CD.Instance, pos: CD.Position, orient: CD.Orientation,
pr: CD.DrawRef] = 
BEGIN

DrawPath: PROC [context: Imager.Context, ob: CD.Object, layer: CD.Layer] =
BEGIN
Imager.MaskFillTrajectory[context, markObjectPath];
END;

IF pr.symbolics AND (pr.scaleHint*inst.ob.size.y>2 OR pr.scaleHint<=0) THEN { 
pr.drawContext[pr, DrawPath, markObject, pos, orient, markLayer]
}
END; 

Init[];
END. 



^CDSymbolicObjectsImpl.mesa  (part of ChipNDale)
Copyright c 1984, 1985 by Xerox Corporation.  All rights reserved.
by Christian Jacobi,  August 8, 1984 12:41:50 pm PDT 
last edited Christian Jacobi,  January 28, 1986 1:55:46 pm PST
--rects
--lines
--points
--common
--pin
--mark
--segment
-- erroneous parameters..
-- erroneous parameters..


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