---
name: Add left brace
description: 动作脚本：自动生成对应的图形元素。
author: ymjr
version: 1.0.0
license: MIT
usage: 运行此脚本生成图形。
features:
  - 自动计算并生成图形
dependencies:
  - 无依赖
autorun: false
---
/*
```javascript
*/
var locales = {
  zh: {
    log_add_brace: "添加左侧大括号",
    notice_added: "已添加左侧大括号"
  },
  en: {
    log_add_brace: "Add left brace",
    notice_added: "Add left brace done"
  }
};
console.log(t("log_add_brace"));
const api = ea.getExcalidrawAPI();
const selectedEls = ea.getViewSelectedElements();
const shiftKey = ea.targetView.modifierKeyDown.shiftKey;

const top = Math.min(...selectedEls.map(el => el.y))
const bottom = selectedEls.reduce(function(max, el) {
  const sum = el.y + el.height;
  return Math.max(max, sum);
}, -Infinity);
const left = selectedEls.reduce(function(min, el) {
  const x = el.x;
  return Math.min(min, x);
}, Infinity);
const height = bottom - top
let points;
if (!shiftKey) {
  points = [[0, -height*0.5],
                  [height*-0.1, -height*0.4],
                  [height*-0.1, -height*0.1],
                  [height*-0.2, 0],
                  [height*-0.1, height*0.1],
                  [height*-0.1, height*0.4],
                  [0, height*0.5]]
  ea.style.roughness = 0;
  ea.style.roundness = {type: 2};
  ea.style.strokeWidth = 2;
} else {
    points = [[0, -height*0.5],
            [height*-0.1, -height*0.4],
            [height*-0.1, -height*0.08],
            [height*-0.2, 0],
            [height*-0.1, height*0.08],
            [height*-0.1, height*0.4],
            [0, height*0.5]]
  ea.style.roughness = 0;
  ea.style.roundness = null;
  ea.style.strokeWidth = 2;
}
const id = ea.addLine(points);
const element = ea.getElement(id)
element.x = left - 10 
element.y = top
ea.addElementsToView(false, false, true);
new Notice(t("notice_added"));