
    <<CMosBWellDifImpl.mesa  (part of ChipNDale)>>
        <<Copyright © 1983, 1985, 1986 by Xerox Corporation.  All rights reserved.>>
        <<Created by Christian Jacobi,  September 10, 1983 9:34 pm >>
        <<Last Edited by: Christian Jacobi, October 17, 1986 2:00:20 pm PDT>>

    DIRECTORY
        CD,
        CDBasics,
        CDBasicsInline,
        CDRects,
        CDIO,
        CMosB,
        Rope,
        TokenIO;

    CMosBWellDifImpl: CEDAR PROGRAM 
        IMPORTS CD, CDBasics, CDBasicsInline, CDIO, CDRects, CMosB, TokenIO
        SHARES CDRects =   
    BEGIN

    wellSurround: CD.Number = CMosB.wellSurround;

    wpdifClass: CD.ObjectClass = CD.RegisterObjectClass[$C2PDifRect, [
        drawMe: DrawWellPDiffRect,
        interestRect: InsideWellDiffRect,
        showMeSelected: ShowSelectedWellDiffRect,
        internalRead: CDRects.bareRectClass.internalRead,
        internalWrite: WriteWellDif,
        wireTyped: TRUE,
        description: "w-pdif",
        technology: CMosB.cmosB
        ]];
    wndifClass: CD.ObjectClass = CD.RegisterObjectClass[$C2NDifRect, [
        drawMe: DrawWellNDiffRect,
        interestRect: InsideWellDiffRect,
        showMeSelected: ShowSelectedWellDiffRect,
        internalRead: CDRects.bareRectClass.internalRead,
        internalWrite: WriteWellDif,
        wireTyped: TRUE,
        description: "w-ndif",
        technology: CMosB.cmosB
        ]];
    dummySpecific: REF WellRectRep = NEW[WellRectRep]; 
    WellRectRep: TYPE = RECORD [i: INT_0]; 

    WriteWellDif: CD.InternalWriteProc = {
        sz: CD.Position _ CDBasics.SizeOfRect[ob.bbox];
        TokenIO.WriteInt[h, sz.x-2*wellSurround];
        TokenIO.WriteInt[h, sz.y-2*wellSurround];
        CDIO.WriteLayer[h, ob.layer];
        };

    InsideWellDiffRect: PROC [ob: CD.Object] RETURNS [CD.Rect] = {
        RETURN [CDBasics.Extend[ob.bbox, -wellSurround]] 
        };

    ShowSelectedWellDiffRect: CD.DrawProc = {
        pr.drawOutLine[pr, CDBasics.Extend[CDBasics.MapRect[ob.bbox, trans], -(wellSurround)], CD.selectionLayer]
        };

    CreateWellDiffRect: PROC [size: CD.Position, l: CD.Layer] RETURNS [ob: CD.Object] = {
        <<--we do not lru cache; CDRects caching is good enough>>
        size _ CDBasics.MaxPoint[size, [1, 1]];
        ob _ NEW[CD.ObjectRep _ [class: wpdifClass, specific: dummySpecific]];
        IF l=CMosB.wpdif THEN ob.class _ wpdifClass
        ELSE IF l=CMosB.wndif THEN ob.class _ wndifClass
        ELSE { --actally error, but try to correct
            IF l=CMosB.ndif THEN {l _ CMosB.wndif; ob.class _ wndifClass}
            ELSE IF l=CMosB.pdif THEN {l _ CMosB.wpdif; ob.class _ wpdifClass}
            ELSE ERROR
            };
        ob.bbox _ [x1: -wellSurround, y1: -wellSurround, x2: size.x+wellSurround, y2: size.y+wellSurround];
        ob.layer _ l;
        };

    DrawWellPDiffRect: CD.DrawProc = {
        r: CD.Rect = CDBasicsInline.MapRect[ob.bbox, trans]; 
        pr.drawRect[pr,CDBasics.Extend[r, -wellSurround], CMosB.pdif];
        pr.drawRect[pr, r, CMosB.nwell]; 
        }; 

    DrawWellNDiffRect: CD.DrawProc = {
        r: CD.Rect = CDBasicsInline.MapRect[ob.bbox, trans]; 
        pr.drawRect[pr, CDBasics.Extend[r, -wellSurround], CMosB.ndif];
        pr.drawRect[pr, r, CMosB.pwell]; 
        }; 

    CDRects.UseAsCreateRect[CMosB.wpdif, CreateWellDiffRect, wpdifClass];
    CDRects.UseAsCreateRect[CMosB.wndif, CreateWellDiffRect, wndifClass];
    END.