HarmonyOS 计算关键在在文本的展示位置

当前HarmonyOS有字体引擎API，可以进行精确计算，可进行尝试。文档参考：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-graphics-text-V5

使用方式参考：https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/text-js-guidelines-V5

使用示例：

let myParagraphStyle: text.ParagraphStyle = {
  align: text.TextAlign.LEFT,
  maxLines: 3
};
let myTextStyle: text.TextStyle = {
  fontSize: 20
};
let fontCollection = new text.FontCollection();
let ParagraphGraphBuilder = new text.ParagraphBuilder(myParagraphStyle, fontCollection);
ParagraphGraphBuilder.addText("一套代码工程，一次开发上架，多端按需部署，为用户呈现多设备统一且卓越的使用体验。");
ParagraphGraphBuilder.pushStyle(myTextStyle);
let paragraph = ParagraphGraphBuilder.build()
paragraph.layoutSync(20)
let lines = paragraph.getTextLines();
console.log(`lines: ${JSON.stringify(lines.length)}`)
if (lines.length > 0) {
  let line = lines[lines.length-1]
  console.log(`line.getTextRange(): ${JSON.stringify(line.getTextRange())}`)
}