import 'package:flutter/material.dart';

/// 只让输入区响应键盘高度，避免整棵页面随 MediaQuery 反复重建。
class KeyboardLift extends StatelessWidget {
  final Widget child;

  const KeyboardLift({super.key, required this.child});

  @override
  Widget build(BuildContext context) {
    final bottom = MediaQuery.viewInsetsOf(context).bottom;
    return Padding(
      padding: EdgeInsets.only(bottom: bottom),
      child: child,
    );
  }
}

/// 只移动已有前景图层，不在键盘动画期间重新布局子组件。
class KeyboardTranslate extends StatelessWidget {
  final Widget child;

  const KeyboardTranslate({super.key, required this.child});

  @override
  Widget build(BuildContext context) {
    final bottom = MediaQuery.viewInsetsOf(context).bottom;
    return Transform.translate(
      offset: Offset(0, -bottom),
      transformHitTests: true,
      child: RepaintBoundary(child: child),
    );
  }
}