tldraw_0/state/commands/style.ts

import Command from "./command"
import history from "../history"
import { Data, ShapeStyles } from "types"
import { getPage, getSelectedShapes } from "utils/utils"
import { getShapeUtils } from "lib/shape-utils"
import { current } from "immer"

export default function styleCommand(data: Data, styles: ShapeStyles) {
  const { currentPageId } = data
  const initialShapes = getSelectedShapes(current(data))

  history.execute(
    data,
    new Command({
      name: "changed_style",
      category: "canvas",
      manualSelection: true,
      do(data) {
        const { shapes } = getPage(data, currentPageId)

        for (const { id } of initialShapes) {
          const shape = shapes[id]
          getShapeUtils(shape).applyStyles(shape, styles)
        }
      },
      undo(data) {
        const { shapes } = getPage(data, currentPageId)

        for (const { id, style } of initialShapes) {
          const shape = shapes[id]
          getShapeUtils(shape).applyStyles(shape, style)
        }
      },
    })
  )
}