export function calcExtendsLineSegmentOfRect()

in packages/shared/src/coordinate.ts [445:520]

• 76 lines of code
• 16 McCabe index (conditional complexity)

export function calcExtendsLineSegmentOfRect(
  targetRect: Rect,
  referRect: Rect
) {
  if (
    referRect.right < targetRect.right &&
    targetRect.left <= referRect.right
  ) {
    //右侧
    if (referRect.bottom < targetRect.top) {
      //上方
      return {
        start: { x: referRect.right, y: referRect.bottom },
        end: { x: targetRect.right, y: referRect.bottom },
      }
    } else if (referRect.top > targetRect.bottom) {
      //下方
      return {
        start: { x: referRect.right, y: referRect.top },
        end: { x: targetRect.right, y: referRect.top },
      }
    }
  } else if (
    referRect.left > targetRect.left &&
    targetRect.right >= referRect.left
  ) {
    //左侧
    if (referRect.bottom < targetRect.top) {
      //上方
      return {
        start: { x: targetRect.left, y: referRect.bottom },
        end: { x: referRect.left, y: referRect.bottom },
      }
    } else if (referRect.top > targetRect.bottom) {
      //下方
      return {
        start: { x: targetRect.left, y: referRect.top },
        end: { x: referRect.left, y: referRect.top },
      }
    }
  }
  if (referRect.top < targetRect.top && targetRect.bottom >= referRect.top) {
    //refer在上方
    if (referRect.right < targetRect.left) {
      //右侧
      return {
        start: { x: referRect.right, y: referRect.bottom },
        end: { x: referRect.right, y: targetRect.bottom },
      }
    } else if (referRect.left > targetRect.right) {
      //左侧
      return {
        start: { x: referRect.left, y: referRect.bottom },
        end: { x: referRect.left, y: targetRect.bottom },
      }
    }
  } else if (
    referRect.bottom > targetRect.bottom &&
    referRect.top <= targetRect.bottom
  ) {
    //refer下方
    if (referRect.right < targetRect.left) {
      //右侧
      return {
        start: { x: referRect.right, y: targetRect.top },
        end: { x: referRect.right, y: referRect.top },
      }
    } else if (referRect.left > targetRect.right) {
      //左侧
      return {
        start: { x: referRect.left, y: targetRect.top },
        end: { x: referRect.left, y: referRect.top },
      }
    }
  }
}