Ctrl+C复制卡死问题优化

var oldExecute = GC.Spread.Sheets.Commands.copy.execute;
GC.Spread.Sheets.Commands.copy.execute = function (context, options) {
    var sheet = context.getSheetFromName(options.sheetName);
    var selections = sheet.getSelections();
    var count = 0;
    for (let range of selections) {
        var rowCount = range.rowCount;
        if (range.row === -1) {
            rowCount = sheet.getRowCount();
        }
        var colCount = range.colCount;
        if (range.col === -1) {
            colCount = sheet.getColumnCount();
        }
        count += rowCount * colCount;
    }
    if (count > 10000) {
        throw new Error("Copy too many cells maybe very slow.")
    }
    return oldExecute(context, options);
};