Illustrator：同じカラーを選択をUIにし、ついでにグローバルスウォッチを作成

SelectSameColor.jsx

(function () {
    if (app.documents.length === 0) return;

    if (app.selection && app.selection.length > 1) {
        alert("複数のオブジェクトが選択されています。1つだけ選択して実行してください。");
        return;
    }

    var base = [];
    if (app.selection) for (var i = 0; i < app.selection.length; i++) base.push(app.selection[i]);

    var dlg = new Window("dialog", "共通の色で選択");
    var pnl = dlg.add("panel", undefined, "共通");
    pnl.orientation = "row";
    var rbFill = pnl.add("radiobutton", undefined, "塗り");
    var rbStroke = pnl.add("radiobutton", undefined, "線");
    rbFill.value = true;

    var cbMake = dlg.add("checkbox", undefined, "スウォッチ作成");
    cbMake.value = false;

    var g = dlg.add("group");
    g.alignment = "right";
    g.add("button", undefined, "キャンセル", { name: "cancel" });
    var btnOK = g.add("button", undefined, "OK", { name: "ok" });

    btnOK.onClick = function () {
        if (!cbMake.value) { dlg.close(1); return; }

        var doc = app.activeDocument;
        var src = base && base.length ? base[0] : null;
        var col = null;

        if (src) {
            if (rbFill.value && src.filled) col = src.fillColor;
            else if (rbStroke.value && src.stroked) col = src.strokeColor;
        }
        if (!col) { dlg.close(1); return; }

        if (col.typename === "SpotColor" && col.spot && col.spot.color)
            col = col.spot.color;

        if (!(col.typename === "RGBColor" || col.typename === "CMYKColor" || col.typename === "GrayColor")) {
            dlg.close(1);
            return;
        }

        var swName = (col.typename === "RGBColor") ?
            "RGB-" + col.red + "-" + col.green + "-" + col.blue :
            (col.typename === "CMYKColor") ?
                "CMYK-" + col.cyan + "-" + col.magenta + "-" + col.yellow + "-" + col.black :
                "Gray-" + col.gray;

        for (var s = doc.swatches.length - 1; s >= 0; s--)
            try { if (doc.swatches[s].name === swName) doc.swatches[s].remove(); } catch (_) { }
        for (var p = doc.spots.length - 1; p >= 0; p--)
            try { if (doc.spots[p].name === swName) doc.spots[p].remove(); } catch (_) { }

        var sp = doc.spots.add();

        // Illustratorの挙動対策：まず color、次に spotKind、最後に name
        sp.color = col;
        sp.spotKind = SpotColorKind.SPOTPROCESS;
        sp.name = String(swName);

        dlg.close(1);
    };

    rbFill.onClick = apply;
    rbStroke.onClick = apply;

    function apply() {
        app.selection = base;
        app.executeMenuCommand(rbFill.value ? "Find Fill Color menu item" : "Find Stroke Color menu item");
        try { if (typeof refreshUI === "function") refreshUI(); } catch (_) { }
        try { $.sleep(200); } catch (_) { }
        try { app.redraw(); } catch (_) { }
    }

    apply();
    dlg.show();
})();