antd-mobile-taro-ui/cjs/components/water-mark/water-mark.js

以antd-mobile为设计标准，基于taro框架的微信小程序组件库

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.WaterMark = void 0;

var _classnames = _interopRequireDefault(require("classnames"));

var _react = _interopRequireWildcard(require("react"));

var _nativeProps = require("antd-mobile/es/utils/native-props");

var _withDefaultProps = require("antd-mobile/es/utils/with-default-props");

var _components = require("@tarojs/components");

var _taro = _interopRequireDefault(require("@tarojs/taro"));

var _client = require("../../utils/client");

function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }

function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

const classPrefix = `adm-water-mark`;
const defaultProps = {
  fullPage: true
};

const WaterMark = p => {
  const props = (0, _withDefaultProps.mergeProps)(defaultProps, p);
  const {
    zIndex = 2000,
    gapX = 24,
    gapY = 48,
    width = 120,
    height = 64,
    rotate = -22,
    image,
    imageWidth = 120,
    imageHeight = 64,
    content,
    fontStyle = 'normal',
    fontWeight = 'normal',
    fontColor = 'rgba(0,0,0,.15)',
    fontSize = 14,
    fontFamily = 'sans-serif'
  } = props;
  const [base64Url, setBase64Url] = (0, _react.useState)('');
  const canvasRef = (0, _react.useRef)(null);
  (0, _react.useEffect)(() => {
    setTimeout(() => {
      var _a, _b;

      const canvasDraw = (canvas, ratio, img) => {
        const ctx = canvas.getContext('2d');
        const canvasWidth = (gapX + width) * ratio;
        const canvasHeight = (gapY + height) * ratio;
        const markWidth = width * ratio;
        const markHeight = height * ratio;
        canvas.width = canvasWidth;
        canvas.height = canvasHeight;

        if (ctx) {
          if (image) {
            ctx.translate(markWidth / 2, markHeight / 2);
            ctx.rotate(Math.PI / 180 * Number(rotate));
            img.crossOrigin = 'anonymous';
            img.referrerPolicy = 'no-referrer';

            img.onload = () => {
              ctx.drawImage(img, -imageWidth * ratio / 2, -imageHeight * ratio / 2, imageWidth * ratio, imageHeight * ratio);
              ctx.restore();
              setBase64Url(canvas.toDataURL());
            };

            img.src = image;
          } else if (content) {
            ctx.textBaseline = 'middle';
            ctx.textAlign = 'center';
            ctx.translate(markWidth / 2, markHeight / 2);
            ctx.rotate(Math.PI / 180 * Number(rotate));
            const markSize = Number(fontSize) * ratio;
            ctx.font = `${fontStyle} normal ${fontWeight} ${markSize}px/${markHeight}px ${fontFamily}`;
            ctx.fillStyle = fontColor;
            ctx.fillText(content, 0, 0);
            ctx.restore();
            setBase64Url(canvas.toDataURL());
          }
        } else {
          throw new Error('Canvas is not supported in the current environment');
        }
      };

      if (_client.isWeapp) {
        const query = _taro.default.createSelectorQuery();

        if (!canvasRef.current) return;

        if ((_a = canvasRef.current) === null || _a === void 0 ? void 0 : _a.sid) {
          query.select(`#${(_b = canvasRef.current) === null || _b === void 0 ? void 0 : _b.sid}`).fields({
            node: true,
            size: true
          }).exec(res => {
            var _a, _b;

            const canvas = (_a = res[0]) === null || _a === void 0 ? void 0 : _a.node;
            const ratio = ((_b = _taro.default.getSystemInfoSync()) === null || _b === void 0 ? void 0 : _b.pixelRatio) || 1;
            const img = canvas.createImage();
            canvasDraw(canvas, ratio, img);
          });
        }
      } else if (_client.isH5) {
        const canvas = document.createElement('canvas');
        const ratio = window.devicePixelRatio;
        const img = new Image();
        canvasDraw(canvas, ratio, img);
      }
    }, 0);
  }, [gapX, gapY, rotate, fontStyle, fontWeight, width, height, fontFamily, fontColor, image, content, fontSize]);
  return (0, _nativeProps.withNativeProps)(props, _react.default.createElement(_react.default.Fragment, null, _react.default.createElement(_components.View, {
    className: (0, _classnames.default)(classPrefix, {
      [`${classPrefix}-full-page`]: props.fullPage
    }),
    style: {
      zIndex,
      backgroundSize: `${gapX + width}px`,
      backgroundImage: `url('${base64Url}')`
    }
  }), _react.default.createElement(_components.Canvas, {
    type: '2d',
    style: {
      display: 'none'
    },
    ref: canvasRef
  })));
};

exports.WaterMark = WaterMark;