@nutui/nutui-react-taro
Version:
京东风格的轻量级移动端 React 组件库，支持一套代码生成 H5 和小程序
121 lines (120 loc) • 6.04 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
Object.defineProperty(exports, "WaterMark", {
enumerable: true,
get: function() {
return WaterMark;
}
});
var _interop_require_default = require("@swc/helpers/_/_interop_require_default");
var _interop_require_wildcard = require("@swc/helpers/_/_interop_require_wildcard");
var _define_property = require("@swc/helpers/_/_define_property");
var _object_spread = require("@swc/helpers/_/_object_spread");
var _object_spread_props = require("@swc/helpers/_/_object_spread_props");
var _sliced_to_array = require("@swc/helpers/_/_sliced_to_array");
var _react = /*#__PURE__*/ _interop_require_wildcard._(require("react"));
var _taro = require("@tarojs/taro");
var _components = require("@tarojs/components");
var _classnames = /*#__PURE__*/ _interop_require_default._(require("classnames"));
var _index = require("../configprovider/index");
var _typings = require("../../utils/typings");
var defaultProps = (0, _object_spread_props._)((0, _object_spread._)({}, _typings.ComponentDefaults), {
content: '',
fullPage: true,
zIndex: 2000,
gapX: 24,
gapY: 48,
width: 120,
height: 64,
startX: 0,
startY: 0,
image: '',
imageWidth: 120,
imageHeight: 64,
rotate: -22,
color: 'rgba(0,0,0,.15)',
fontStyle: 'normal',
fontWeight: 'normal',
fontSize: 14
});
var WaterMark = function WaterMark(props) {
var locale = (0, _index.useConfig)().locale;
var _$_object_spread = (0, _object_spread._)({}, defaultProps, props), content = _$_object_spread.content, fullPage = _$_object_spread.fullPage, zIndex = _$_object_spread.zIndex, className = _$_object_spread.className, gapX = _$_object_spread.gapX, gapY = _$_object_spread.gapY, startX = _$_object_spread.startX, startY = _$_object_spread.startY, width = _$_object_spread.width, height = _$_object_spread.height, image = _$_object_spread.image, imageWidth = _$_object_spread.imageWidth, imageHeight = _$_object_spread.imageHeight, rotate = _$_object_spread.rotate, color = _$_object_spread.color, fontStyle = _$_object_spread.fontStyle, fontFamily = _$_object_spread.fontFamily, fontWeight = _$_object_spread.fontWeight, fontSize = _$_object_spread.fontSize, style = _$_object_spread.style;
var _useState = (0, _sliced_to_array._)((0, _react.useState)(''), 2), base64Url = _useState[0], setBase64Url = _useState[1];
var classPrefix = 'nut-watermark';
var classes = (0, _classnames.default)(classPrefix, (0, _define_property._)({}, "".concat(classPrefix, "-full-page"), fullPage));
var cls = (0, _classnames.default)(classes, className);
(0, _react.useEffect)(function() {
init();
}, []);
var init = function init() {
var ratio = 1;
(0, _taro.getSystemInfo)().then(function(res) {
ratio = res.pixelRatio;
var canvasWidth = "".concat((gapX + width) * ratio);
var canvasHeight = "".concat((gapY + height) * ratio);
var markWidth = width * ratio;
var markHeight = height * ratio;
var ctx;
var canvas;
if (process.env.TARO_ENV === 'h5') {
canvas = document.createElement('canvas');
ctx = canvas.getContext('2d');
canvas.setAttribute('width', "".concat(canvasWidth, "px"));
canvas.setAttribute('height', "".concat(canvasHeight, "px"));
} else {
canvas = (0, _taro.createOffscreenCanvas)({
type: '2d',
width: Number(canvasWidth),
height: Number(canvasHeight)
});
ctx = canvas.getContext('2d');
}
if (ctx) {
if (image) {
ctx.translate(markWidth / 2, markHeight / 2);
ctx.rotate(Math.PI / 180 * Number(rotate));
var img;
if (process.env.TARO_ENV === 'h5') {
img = new Image();
} else {
img = canvas.createImage();
}
img.crossOrigin = 'anonymous';
img.referrerPolicy = 'no-referrer';
img.src = image;
img.onload = function() {
ctx.drawImage(img, -imageWidth * ratio / 2, -imageHeight * ratio / 2, imageWidth * ratio, imageHeight * ratio);
ctx.restore();
setBase64Url(canvas.toDataURL());
};
} else if (content) {
ctx.textBaseline = 'middle'; // 设置或返回在绘制文本时使用的当前文本基线。(正中)
ctx.textAlign = 'center'; // 设置或返回文本内容的当前对齐方式。
// 文字绕中间旋转
ctx.translate(markWidth / 2, markHeight / 2);
ctx.rotate(Math.PI / 180 * Number(rotate));
var markSize = Number(fontSize) * ratio;
ctx.font = "".concat(fontStyle, " normal ").concat(fontWeight, " ").concat(markSize, "px/").concat(markHeight, "px ").concat(fontFamily);
ctx.fillStyle = color;
ctx.fillText(content, startX, startY); // 在画布上绘制"被填充的"文本。
ctx.restore(); // 返回之前保存过的路径状态和属性。
setBase64Url(canvas.toDataURL());
}
} else {
throw new Error(locale.watermark.errorCanvasTips);
}
});
};
return /*#__PURE__*/ _react.default.createElement(_components.View, {
className: cls,
style: (0, _object_spread._)({
zIndex: zIndex,
backgroundSize: "".concat(gapX + width, "px"),
backgroundImage: "url('".concat(base64Url, "')")
}, style)
});
};
WaterMark.displayName = 'NutWaterMark';