DIRECTORY
Atom,
CD,
CDBasics,
CDCells,
CDDrawQueue,
CDEvents,
CDInstances,
CDIOExtras,
CDOps,
CDOrient,
CDProperties,
CDRects,
CDSimpleOps,
CDValue,
Process, 
Rope USING [ROPE],
SafeStorage,
SymTab,
TerminalIO;

CDOpsImpl: CEDAR MONITOR 
IMPORTS Atom, CD, CDBasics, CDCells, CDDrawQueue, CDEvents, CDInstances, CDIOExtras, CDOps, CDOrient, CDProperties, CDRects, CDSimpleOps, CDValue, Process, SafeStorage, SymTab, TerminalIO
EXPORTS CDOps
SHARES CD = 
BEGIN
createEvent: CDEvents.EventRegistration=CDEvents.RegisterEventType[$CreateNewDesign];
resetDesignEvent: CDEvents.EventRegistration=CDEvents.RegisterEventType[$ResetDesign];
delayedKey: REF _ NEW[INT];

DelRec: TYPE = RECORD [
delayedList: LIST OF Remember_NIL,
length: INT _ 0
];

GetDelRec: PROC [design: CD.Design] RETURNS [REF DelRec] =
BEGIN
x: REF _ CDValue.Fetch[boundTo: design, key: delayedKey, propagation: design];
IF x#NIL AND ISTYPE[x, REF DelRec] THEN RETURN [NARROW[x]]
ELSE {
dr: REF DelRec = NEW[DelRec_[NIL]];
CDValue.Store[design, delayedKey, dr];
RETURN [dr]
}
END;

Remember: TYPE = RECORD [area: CD.Rect, clear: BOOL];

InternalResetDesign: PROC[design: CD.Design] = 
BEGIN
dummy: CD.Object _ CDCells.CreateEmptyCell[];
dummy.size _ CDBasics.highposition;
design.cellDirectory _ SymTab.Create[101];
design^.actual _ LIST[CD.PushRec[
dummyCell: CDInstances.NewInstance[ob: dummy],
mightReplace: NIL,
specific: NARROW[dummy.specificRef],
deletedList: NIL]];
END;

CreateDesign: PUBLIC PROC [technology: CD.Technology] RETURNS [design: CD.Design] =
BEGIN
IF technology=NIL THEN ERROR CD.Error[callingError, "NIL technology"];
design _ NEW[CD.DesignRec_[
properties: CD.InitPropRef[],
technology: technology
]];
SafeStorage.EnableFinalization[design];
InternalResetDesign[design]; -- must not cause redraw since event not yet processed
[] _ CDEvents.ProcessEvent[createEvent, design]; 
END;

ResetDesign: PUBLIC PROC [design: CD.Design] =
BEGIN
InternalResetDesign[design];
[] _ CDEvents.ProcessEvent[resetDesignEvent, design]; 
CDValue.Store[design, delayedKey, NIL];
Redraw[design];
END;

RemoveInstance: PUBLIC PROC [design: CD.Design, inst: CD.Instance, draw: BOOL_TRUE] =
BEGIN
il: CD.InstanceList _ CDOps.InstList[design];
IF il#NIL THEN 
IF il.first=inst THEN CDOps.SetInstList[design, il.rest]
ELSE
FOR l: CD.InstanceList _ il, l.rest WHILE l.rest#NIL DO
IF l.rest.first=inst THEN {l.rest_l.rest.rest; EXIT}
ENDLOOP;
IF draw THEN DelayedRedraw[design, CDInstances.InstRectO[inst]];
END;

SelectNewMode: PROC[design: CD.Design] RETURNS [BOOL] =
BEGIN
mode: INT = CDValue.FetchInt[boundTo: design, key: $CDxSelectNewMode, propagation: technology, ifNotFound: 0];
RETURN [mode=1]
END;

AddAnObject: PUBLIC PROC[design: CD.Design, ob: CD.Object, location: CD.Position, orientation: CD.Orientation] =
BEGIN
inst: CD.Instance;
IF ob#NIL THEN {
inst _ CDInstances.NewInstance[ob: ob, location: location, orientation: orientation ];
IF SelectNewMode[design] THEN {
CDSimpleOps.DeselectAll[design];
inst.selected _ TRUE;
};
IncludeInstance[design, inst];
}
END;

IncludeInstance: PUBLIC PROC [design: CD.Design, inst: CD.Instance, draw: BOOL_TRUE] =
BEGIN
IF inst=NIL THEN ERROR CD.Error[callingError, "Include of NIL application"];
IF inst.ob=NIL THEN ERROR CD.Error[callingError, "Include application with NIL object"];
CDOps.SetInstList[design, CONS[inst, CDOps.InstList[design]]];
IF draw THEN DelayedRedraw[design, CDInstances.InstRectO[inst], TRUE];
END;

IncludeInstanceList: PUBLIC PROC [design: CD.Design, il: CD.InstanceList, draw: BOOL_TRUE] =
BEGIN
FOR list: CD.InstanceList _ il, list.rest WHILE list#NIL DO
IncludeInstance[design, list.first, draw];
ENDLOOP;
END;

Redraw: PUBLIC PROC [design: CD.Design, r: CD.Rect_CDOps.all, eraseFirst: BOOL_TRUE] =
BEGIN
CDDrawQueue.InsertDrawCommand[design, CDDrawQueue.Request[IF eraseFirst THEN $redraw ELSE $draw, r]];
END;


CheckForShorten: PROC [dl: REF DelRec] = INLINE {
IF dl.length>20 THEN {
clear: BOOL _ FALSE;
r: CD.Rect _ CDBasics.empty;
FOR lst: LIST OF Remember _ dl.delayedList, lst.rest WHILE lst#NIL DO
clear _ clear OR lst.first.clear;
r _ CDBasics.Surround[r, lst.first.area]
ENDLOOP;
dl.delayedList _ LIST[Remember[area: r, clear: clear]];
dl.length _ 1
};
};

DelayedRedraw: PUBLIC ENTRY PROC [design: CD.Design, r: CD.Rect, eraseFirst: BOOL_TRUE] =
BEGIN
ENABLE UNWIND => NULL;
IF design#NIL THEN {
dl: REF DelRec = GetDelRec[design];
IF dl.delayedList=NIL THEN {
dl.delayedList _  LIST[Remember[area: r, clear: eraseFirst]];
dl.length _ 1
}
ELSE {
list: LIST OF Remember _ dl.delayedList;
DO
IF CDBasics.Intersect[list.first.area, r] THEN {
IF CDBasics.Inside[r, list.first.area] THEN { 
list.first.clear _ list.first.clear OR eraseFirst;
RETURN
}
ELSE IF CDBasics.Inside[list.first.area, r] THEN {
remember: LIST OF Remember _ list;
eraseFirst _ list.first.clear OR eraseFirst;
list.first.area _ r;
WHILE list.rest#NIL DO
IF CDBasics.Inside[list.rest.first.area, r] THEN {
eraseFirst _ list.rest.first.clear OR eraseFirst;
list.rest _ list.rest.rest; --does not change list -> keeps assertion3
dl.length _ dl.length-1;
}
ELSE list _ list.rest --since list.rest#NIL -> keeps assertion3
ENDLOOP;
remember.first.clear _ eraseFirst;
RETURN
}
};
IF list.rest#NIL THEN list_list.rest
ELSE {
list.rest _ LIST[Remember[area: r, clear: eraseFirst]];
dl.length _ dl.length+1;
CheckForShorten[dl];
RETURN
}
ENDLOOP;
} --of dl.delayedList#NIL
} --of design#NIL
END;

DoTheDelayedRedraws: PUBLIC ENTRY PROC [design: CD.Design] =
BEGIN
ENABLE UNWIND => NULL;
sq: REF DelRec = GetDelRec[design];
UNTIL sq.delayedList=NIL DO
CDDrawQueue.InsertDrawCommand[design, CDDrawQueue.Request[(IF sq.delayedList.first.clear THEN $redraw ELSE $draw), sq.delayedList.first.area]];
sq.delayedList _ sq.delayedList.rest
ENDLOOP;
sq.length _ 0;
END;

DrawDesign: PUBLIC PROC[design: CD.Design, pr: CD.DrawRef] =
BEGIN
FOR w: LIST OF CD.PushRec _ design^.actual, w.rest WHILE w#NIL DO
IF pr.stopFlag^ THEN EXIT;
pr.drawChild[w.first.dummyCell, [0, 0], CDOrient.original, pr];
ENDLOOP;
END; 

QuickDrawDesign: PUBLIC PROC[design: CD.Design, pr: CD.DrawRef] =
BEGIN

SomeCommon: PROC[ob: CD.Object, pos: CD.Position, orient: CD.Orientation,
pr: CD.DrawRef] RETURNS [BOOLEAN] =
INLINE BEGIN
RETURN CDBasics.Intersect[CDOrient.RectAt[pos, ob.size, orient], pr.interestClip] 
END; 

DrawAndShowSelectionList: PROC [list: CD.InstanceList, pr: CD.DrawRef] =
INLINE BEGIN
FOR w: CD.InstanceList _ list, w.rest WHILE w#NIL DO
IF SomeCommon[w.first.ob, w.first.location, w.first.orientation, pr] THEN
BEGIN
IF pr.stopFlag^ THEN EXIT;
w.first.ob.class.quickDrawMe[w.first, w.first.location, w.first.orientation, pr];
IF w.first.selected THEN
w.first.ob.class.showMeSelected[w.first, w.first.location, w.first.orientation, pr];
END;
ENDLOOP;
END; 

pr.setGround[pr: pr, pushedOut: FALSE];
DrawAndShowSelectionList[CDOps.InstList[design], pr];
IF design^.actual.rest#NIL THEN {
pr.drawOutLine[design^.actual.first.specific.ir, pr];
IF pr.environment THEN { 
pr.setGround[pr: pr, pushedOut: TRUE];
FOR w: LIST OF CD.PushRec _ design^.actual.rest, w.rest WHILE w#NIL DO
IF pr.stopFlag^ THEN EXIT;
w.first.dummyCell.ob.class.quickDrawMe[w.first.dummyCell, [0, 0], CDOrient.original, pr];
ENDLOOP;
};
}
END; 

PointedInstance: PUBLIC PROC  [design: CD.Design, pos: CD.Position] 
RETURNS [CD.Instance] =
BEGIN
RETURN [ CDInstances.InstanceAt[CDOps.InstList[design], pos] ];
END;

SelectedInstance: PUBLIC PROC [design: CD.Design] 
RETURNS [first: CD.Instance_NIL, multiple: BOOL_FALSE] =
BEGIN
FOR w: CD.InstanceList _ CDOps.InstList[design], w.rest WHILE w#NIL DO
IF w.first.selected THEN
IF first=NIL THEN first_w.first
ELSE {multiple_TRUE; RETURN}
ENDLOOP;
END;

Info: PUBLIC PROC[ob: CD.Object] RETURNS [Rope.ROPE] =
BEGIN
IF ob=NIL THEN RETURN ["nil object"]
ELSE IF ob.class.describe#NIL THEN RETURN [ob.class.describe[ob]] 
ELSE RETURN [Atom.GetPName[ob.class.objectType]]
END;

LayerName: PUBLIC PROC[lev: CD.Layer] RETURNS [Rope.ROPE] =
BEGIN
uniqueKey: ATOM = CD.LayerKey[lev];
IF uniqueKey=NIL THEN RETURN ["bad layer"]; 
RETURN [Atom.GetPName[uniqueKey]]
END;

ReOrderInstance: PUBLIC PROC [design: CD.Design, inst: CD.Instance] =
BEGIN
il: CD.InstanceList _ CDOps.InstList[design];
found: BOOL _ FALSE;
IF inst=NIL THEN ERROR CD.Error[callingError, "Reorder of NIL application"];
WHILE il#NIL AND il.first=inst DO {found_TRUE; il _ il.rest} ENDLOOP;
IF il=NIL THEN {
IF found THEN il_LIST[inst] 
ELSE ERROR CD.Error[callingError, "Reorder of application not in design"];
}
ELSE 
FOR l: CD.InstanceList _ il, l.rest DO
WHILE l.rest#NIL AND l.rest.first=inst DO {found_TRUE; l.rest _ l.rest.rest} ENDLOOP;
IF l.rest=NIL THEN {
IF found THEN l.rest _ LIST[inst]
ELSE ERROR CD.Error[callingError, "Reorder of application not contained in design"];
EXIT
}
ENDLOOP;
CDOps.SetInstList[design, il];
END;



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

ReadCollected: CD.InternalReadProc --PROC [] RETURNS [Object]-- =
BEGIN
sz: CD.Position = CDIOExtras.ReadPos[];
ob: CD.Object = CDRects.CreateRect[sz, CD.highLightError];
r: Rope.ROPE = "*design of this object has been destroyed; bug in creator program\n";
CDProperties.PutPropOnObject[ob, $SignalName, r];
TerminalIO.WriteRope[r];
RETURN [ob]
END;

WriteCollected: CD.InternalWriteProc -- PROC [me: Object] -- =
BEGIN
CDIOExtras.WritePos[CD.InterestSize[me]];
TerminalIO.WriteRope["*write object which has been destroyed\n"];
END;

gCollectedClass: REF CD.ObjectClass = CD.RegisterObjectClass[$GCollected];
DestroyEachObject: SymTab.EachPairAction = 
BEGIN
WITH val SELECT FROM
ob: CD.Object => IF ob.class=NIL OR ob.class.inDirectory THEN {
ob.class _ gCollectedClass; 
ob.layer _ CD.highLightError; 
ob.specificRef _ NIL;
ob.properties _ NIL;
};
ENDCASE => NULL;
END;

FinalizeDesign: PROC [d: CD.Design] = 
BEGIN
d.properties _ NIL;
IF d.cellDirectory#NIL AND CDValue.Fetch[d, $KeepObjects]=NIL THEN
[] _ d.cellDirectory.Pairs[DestroyEachObject];
WHILE d.actual#NIL DO
d.actual.first.dummyCell.properties _ NIL;
IF d.actual.first.mightReplace#NIL THEN d.actual.first.mightReplace.properties _ NIL;
d.actual.first.deletedList _ NIL;
d.actual _ d.actual.rest;
ENDLOOP;
d.cellDirectory _ NIL;
d.designValues _ NIL;
d.queue _ NIL;
d.seqPrivate _ NIL;
d.privateDrawQueue _ NIL;
END;

FinalizerProcess: PROC[fooFQ: SafeStorage.FinalizationQueue] =
BEGIN
DO
d: CD.Design = NARROW[SafeStorage.FQNext[fooFQ]];
FinalizeDesign[d];
ENDLOOP
END;

fooFQ: SafeStorage.FinalizationQueue = SafeStorage.NewFQ[];
SafeStorage.EstablishFinalization[CODE[CD.DesignRec], 0, fooFQ];
gCollectedClass.drawMe _ gCollectedClass.quickDrawMe _ DrawCollected;
gCollectedClass.internalRead _ ReadCollected;
gCollectedClass.internalWrite _ WriteCollected;
gCollectedClass.description _ "garbage object; design has been destroyed";
TRUSTED {Process.Detach[FORK FinalizerProcess[fooFQ]]};
CDValue.EnregisterKey[$KeepObjects];
END. 


��¶��CDOpsImpl.mesa       (part of ChipNDale)
Copyright c 1983, 1986 by Xerox Corporation.  All rights reserved.
by Christian Jacobi,  July 12, 1983 10:56 am 
last edited by Christian Jacobi,  March 11, 1986 1:21:44 pm PST
--is local since it does not cause a redraw
--ASSERTION1: {list#NIL}
--ASSERTION2: {no list rectangle is completely covered by an other one}
--r is contained somewhere; we dont include it
--it is unlikely that a small area is cleared and a big one not
--assertion2 => no other elements could be removed
--r contains an element; we remove this element and all others
--		which are contained in r
--it is unlikely that a small area is cleared and a big one not
--remove all other element contained in r; to maintain assertion2
assert3: list#NIL
-- drawDesign
--first: returns ref to any selected application if there is one or more, otherwise nil.
--multiple: more than one application is selected
--on return: design has exactly one occurrence of inst, and it is at the end. 
--(includes inst if necessary and removes double occurences)
-- l#NIL AND l.first#inst holds at this point
-- Finalization --
-- designs are finalized to break circularities involving objects or instances

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