MeasureString()填充左侧和右侧的文本

var measurement = "这是MeasureString() 示例";
var leftPadding = " ".repeat(measurement.length - measurement.trim().length);
var rightPadding = "\n".repeat(leftPadding.length);

var totalWidth = leftPadding.length + measurement.trim().length + rightPadding.length;

var width = Math.max(0, totalWidth - leftPadding.length - rightPadding.length);
var height = measurement.length / width;

var measurementWidth = Math.floor(width);

if (measurementWidth <= measurement.length) {
  var measurementLength = Math.min(measurementWidth, measurement.length);
  var measurementCutStart = measurement.length - measurementLength;
  var measurementCut = measurement.substring(0, measurementCutStart) + measurement.substring(measurementCutStart);
} else {
  var measurementCutStart = 0;
  var measurementCut = measurement.substring(0, measurement.length);
}

var newMeasurement = leftPadding + measurementCut + rightPadding;

var measureStringResult = newMeasurement + "字符总数: " + measurement.length;

 MeasureString() 示例
  字符总数: 19