React如何实现视频旋转缩放

import { Player, Video, DefaultUi, Settings, MenuItem } from '@vime/react';

// 初始宽度
const INIT_WIDTH = 370;
// 初始高度
const INIT_HEIGHT = 658;

const Demo = ({ src }) => {
  const [visible, setVisible] = useState(false);
  // vime组件宽高比例
  const [aspectRatio, setAspectRatio] = useState('9:16');
  // 容器宽度，vime组件会根据容器宽高自适应
  const [width, setWidth] = useState<string | number>(INIT_WIDTH);
  // 旋转角度
  const degRef = useRef(0);

  useEffect(() => {
    if (src) {
      setVisible(true);
    } else {
      setVisible(false);
    }
  }, [src]);

  const closeVideoPreview = () => {
    setVisible(false);
  };

  const onRotate = () => {
    const videoEl: HTMLVideoElement | null = document.querySelector('.sc-vm-file');
    if (!videoEl) return;
    const vWidth = INIT_WIDTH;
    const vHeight = INIT_HEIGHT;
    const deg = degRef.current < 270 ? degRef.current + 90 : 0;
    // 旋转后样式
    let newRatio = '16:9';
    let newWidth = vHeight;
    let resWidth = `${vWidth}px`;
    let resHeight = `${vHeight}px`;
    let top = (vWidth - vHeight) / 2;
    let left = (vHeight - vWidth) / 2;
    // 水平角度复原处理
    if (deg === 0 || deg === 180) {
      newWidth = INIT_WIDTH;
      newRatio = '9:16';
      resWidth = '100%';
      resHeight = '100%';
      top = 0;
      left = 0;
    }

    videoEl.style.width = resWidth;
    videoEl.style.height = resHeight;
    videoEl.style.transform = `rotate(${deg}deg)`;
    videoEl.style.top = `${top}px`;
    videoEl.style.left = `${left}px`;
    setWidth(newWidth);
    setAspectRatio(newRatio);
  };

  return (
    <>
      {visible ? (
        <div className='video-preview'>
          <div className='video-preview-mask' onClick={() => closeVideoPreview()} />
          <div className="video-preview-content" onClick={() => closeVideoPreview()}>
            <div
              className="video-preview-box"
              style={{ width }}
              onClick={(event) => {
                event.stopPropagation();
              }}
            >
              <Player
                icons="custom"
                aspectRatio={aspectRatio}
              >
                <Video>
                  <source data-src={src} />
                </Video>

                <DefaultUi noControls>
                  // 。。。
                  <Settings active={openMenu}>
                    <MenuItem label="旋转" onClick={onRotate} />
                  </Settings>
                </DefaultUi>
              </Player>
            </div>
          </div>
        </div>
      ) : null}
    </>
  );
};

const player = useRef<HTMLVmPlayerElement>(null);

const changeStyle = (deg: number) => {
  const videoEl: HTMLVideoElement | null = document.querySelector('.sc-vm-file');
  if (!videoEl) return;
  // 获取窗口的宽度
  const screenWidth = window.innerWidth;
  // 获取整个屏幕的高度
  const screenFullHeight = screen.height;
  const vWidth = INIT_WIDTH;
  const vHeight = INIT_HEIGHT;
  // 旋转后样式
  // ...
  // 当全屏旋转90/270度时，宽高处理
  if (player.current?.isFullscreenActive) {
    newWidth = 'auto';
    resWidth = '100vh';
    resHeight = '100vw';
    top = (screenFullHeight - screenWidth) / 2;
    left = (screenWidth - screenFullHeight) / 2;
  }
  // ...
};

// 旋转
const onRotate = () => {
  setOpenMenu(false);
  const newDeg = degRef.current < 270 ? degRef.current + 90 : 0;
  degRef.current = newDeg;
  changeStyle(newDeg);
};

// 全屏
const onVmFullscreenChange = () => {
  if (degRef.current === 90 || degRef.current === 270) {
    changeStyle(degRef.current);
  }
};

return (
  ...
  <Player
    ref={player}
    aspectRatio={aspectRatio}
    onVmFullscreenChange={onVmFullscreenChange}
  >
      ...
  </Player>
)

// 比例
const [scale, setScale] = useState('1');

// 比例缩放
const changeScale = (event: Event) => {
  const radio = event.target as HTMLVmMenuRadioElement;
  const scaleVal = Number(radio.value);
  setScale(radio.value);
  setOpenMenu(false);
  const videoEl: HTMLVideoElement | null = document.querySelector('.sc-vm-file');
  if (!videoEl) return;
  // 宽高 * 选中比例
  const vWidth = INIT_WIDTH * scaleVal;
  const vHeight = INIT_HEIGHT * scaleVal;
  // 视频设置新宽高
  videoEl.style.width = `${vWidth}px`;
  videoEl.style.height = `${vHeight}px`;
  setWidth(vWidth);
};

return (
  ...
    <Submenu label="缩放比例" hint={scale}>
      <MenuRadioGroup value={scale} onVmCheck={changeScale}>
        <MenuRadio label="1" value="1" />
        <MenuRadio label="1.2" value="1.2" />
        <MenuRadio label="1.4" value="1.4" />
        <MenuRadio label="1.6" value="1.6" />
        <MenuRadio label="1.8" value="1.8" />
        <MenuRadio label="2" value="2" />
      </MenuRadioGroup>
    </Submenu>
  ...
)

const scaleRef = useRef(1);

const changeStyle = (deg: number) => {
  const videoEl: HTMLVideoElement | null = document.querySelector('.sc-vm-file');
  if (!videoEl) return;
  // 获取窗口的宽度
  const screenWidth = window.innerWidth;
  // 获取整个屏幕的高度
  const screenFullHeight = screen.height;
  const vWidth = INIT_WIDTH * scaleRef.current;
  const vHeight = INIT_HEIGHT * scaleRef.current;
  // 旋转后样式
  // ...
  // 水平角度处理
  if (deg === 0 || deg === 180) {
    newWidth = INIT_WIDTH * scaleRef.current;
    // ...
  }
  // ...
};

// 比例缩放
const changeScale = (event: Event) => {
  const radio = event.target as HTMLVmMenuRadioElement;
  scaleRef.current = Number(radio.value);
  setScale(radio.value);
  changeStyle(degRef.current);
};