Function findLineKey

packages/editor/src/utils/selection.ts:42–57

(rect: DOMRect)

   * @param rect
   */
  const findLineKey = (rect: DOMRect) => {
    for (const lineKey of lineKeys) {
      const { right } = lineKey
      const previousRects = lines.get(lineKey)
      const lastRect = previousRects
        ? previousRects
            .concat()
            .reverse()
            .find(p => p.width > 0) ?? previousRects[previousRects.length - 1]
        : null
      if (isRectInLine(rect, lineKey) && rect.left <= (lastRect ? lastRect.right : right) + 1) {
        return lineKey
      }
    }
    return null
  }

  // Loop through each rectangle and find its line
  for (let r = 0; r < rects.length; r++) {