export function mkBtnSvg()

in sim/state/buttonpairsim.ts [2:48]
36 lines of code
1 McCabe index (conditional complexity)

    export function mkBtnSvg(xy: Coord): SVGAndSize<SVGGElement> {
        let [innerCls, outerCls] = ["sim-button", "sim-button-outer"];
        const tabSize = PIN_DIST / 2.5;
        const pegR = PIN_DIST / 5;
        const btnR = PIN_DIST * .8;
        const pegMargin = PIN_DIST / 8;
        const plateR = PIN_DIST / 12;

        const pegOffset = pegMargin + pegR;
        let [x, y] = xy;
        const left = x - tabSize / 2;
        const top = y - tabSize / 2;
        const plateH = 3 * PIN_DIST - tabSize;
        const plateW = 2 * PIN_DIST + tabSize;
        const plateL = left;
        const plateT = top + tabSize;
        const btnCX = plateL + plateW / 2;
        const btnCY = plateT + plateH / 2;

        let btng = <SVGGElement>svg.elt("g");
        //tabs
        const mkTab = (x: number, y: number) => {
            svg.child(btng, "rect", { class: "sim-button-tab", x: x, y: y, width: tabSize, height: tabSize})
        }
        mkTab(left, top);
        mkTab(left + 2 * PIN_DIST, top);
        mkTab(left, top + 3 * PIN_DIST);
        mkTab(left + 2 * PIN_DIST, top + 3 * PIN_DIST);

        //plate
        svg.child(btng, "rect", { class: outerCls, x: plateL, y: plateT, rx: plateR, ry: plateR, width: plateW, height: plateH });

        //pegs
        const mkPeg = (x: number, y: number) => {
            svg.child(btng, "circle", { class: "sim-button-nut", cx: x, cy: y, r: pegR });
        }
        mkPeg(plateL + pegOffset, plateT + pegOffset)
        mkPeg(plateL + plateW - pegOffset, plateT + pegOffset)
        mkPeg(plateL + pegOffset, plateT + plateH - pegOffset)
        mkPeg(plateL + plateW - pegOffset, plateT + plateH - pegOffset)

        //inner btn
        let innerBtn = svg.child(btng, "circle", { class: innerCls, cx: btnCX, cy: btnCY, r: btnR });

        //return
        return { el: btng, y: top, x: left, w: plateW, h: plateH + 2 * tabSize };
    }