ng-cw-v12
Version:
Angular UI component library
538 lines (525 loc) • 26.8 kB
JavaScript
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core'), require('html2canvas')) :
typeof define === 'function' && define.amd ? define('ng-cw-v12/html2canvas-service', ['exports', '@angular/core', 'html2canvas'], factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory((global["ng-cw-v12"] = global["ng-cw-v12"] || {}, global["ng-cw-v12"]["html2canvas-service"] = {}), global.ng.core, global.html2canvas));
})(this, (function (exports, i0, html2canvas) { 'use strict';
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var i0__namespace = /*#__PURE__*/_interopNamespace(i0);
var html2canvas__default = /*#__PURE__*/_interopDefaultLegacy(html2canvas);
/******************************************************************************
Copyright (c) Microsoft Corporation.
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
***************************************************************************** */
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var NcHtml2canvasService = /** @class */ (function () {
function NcHtml2canvasService() {
}
/**
* 截图
* @param dom 要截图的DOM元素
* @param options 截图配置
* @param options.type 输出图片的类型，可选值：'canvas' | 'base64' | 'blob'，默认值：'canvas'
* @param options.scale 输出图片的缩放比例，值越大清晰度越高，默认值：1
* @param options.backgroundColor 输出图片的背景颜色，默认值：'white'
* @returns 根据type返回不同类型：
* - 'canvas': 返回 HTMLCanvasElement
* - 'base64': 返回 base64 字符串
* - 'blob': 返回 Blob 对象
*/
NcHtml2canvasService.prototype.html2canvas = function (dom, options) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
return [2 /*return*/, new Promise(function (resolve, reject) { return __awaiter(_this, void 0, void 0, function () {
var canvas, screenScale, width, height, baseScale, ctx, config, data, type;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
canvas = document.createElement("canvas");
screenScale = this.getScreenScale();
width = parseInt(getComputedStyle(dom).width) * screenScale;
height = parseInt(getComputedStyle(dom).height) * screenScale;
baseScale = (options === null || options === void 0 ? void 0 : options.scale) || 1;
//画布实际宽高（像素）
canvas.width = width * baseScale;
canvas.height = height * baseScale;
ctx = canvas.getContext("2d");
//设置绘图上下文的缩放比例，确保绘制的内容与 canvas 的实际尺寸匹配。
ctx.scale(baseScale, baseScale);
//画布在页面上显示的宽高
canvas.style.width = width + 'px';
canvas.style.height = height + 'px';
config = {
backgroundColor: (options === null || options === void 0 ? void 0 : options.backgroundColor) || 'white',
canvas: canvas,
useCORS: true
};
return [4 /*yield*/, html2canvas__default["default"](dom, config)];
case 1:
data = _a.sent();
type = (options === null || options === void 0 ? void 0 : options.type) || 'canvas';
if (type == 'blob') {
data.toBlob(function (blob) {
resolve(blob);
});
}
else if (type == 'base64') {
resolve(data.toDataURL("image/png"));
}
else {
resolve(data);
}
return [2 /*return*/];
}
});
}); })];
});
});
};
// 获取屏幕缩放比例方法
NcHtml2canvasService.prototype.getScreenScale = function () {
var screenScale = 1;
var screen = window.screen;
var ua = navigator.userAgent.toLowerCase();
//设备像素比
if (window.devicePixelRatio !== undefined) {
screenScale = window.devicePixelRatio;
//IE11以下版本浏览器
}
else if (ua.indexOf('msie') > -1) {
if (screen.deviceXDPI && screen.logicalXDPI) {
screenScale = screen.deviceXDPI / screen.logicalXDPI;
}
//浏览器自身缩放
}
else if (window.outerWidth !== undefined && window.innerWidth !== undefined) {
screenScale = window.outerWidth / window.innerWidth;
}
if (screenScale) {
screenScale = Math.round(screenScale * 100) / 100;
}
return screenScale;
};
return NcHtml2canvasService;
}());
NcHtml2canvasService.ɵfac = i0__namespace.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "12.1.5", ngImport: i0__namespace, type: NcHtml2canvasService, deps: [], target: i0__namespace.ɵɵFactoryTarget.Injectable });
NcHtml2canvasService.ɵprov = i0__namespace.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "12.1.5", ngImport: i0__namespace, type: NcHtml2canvasService });
i0__namespace.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "12.1.5", ngImport: i0__namespace, type: NcHtml2canvasService, decorators: [{
type: i0.Injectable
}], ctorParameters: function () { return []; } });
var NcHtml2canvasServiceModule = /** @class */ (function () {
function NcHtml2canvasServiceModule() {
}
return NcHtml2canvasServiceModule;
}());
NcHtml2canvasServiceModule.ɵfac = i0__namespace.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "12.1.5", ngImport: i0__namespace, type: NcHtml2canvasServiceModule, deps: [], target: i0__namespace.ɵɵFactoryTarget.NgModule });
NcHtml2canvasServiceModule.ɵmod = i0__namespace.ɵɵngDeclareNgModule({ minVersion: "12.0.0", version: "12.1.5", ngImport: i0__namespace, type: NcHtml2canvasServiceModule });
NcHtml2canvasServiceModule.ɵinj = i0__namespace.ɵɵngDeclareInjector({ minVersion: "12.0.0", version: "12.1.5", ngImport: i0__namespace, type: NcHtml2canvasServiceModule, providers: [NcHtml2canvasService] });
i0__namespace.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "12.1.5", ngImport: i0__namespace, type: NcHtml2canvasServiceModule, decorators: [{
type: i0.NgModule,
args: [{
providers: [NcHtml2canvasService]
}]
}] });
/**
* Generated bundle index. Do not edit.
*/
exports.NcHtml2canvasService = NcHtml2canvasService;
exports.NcHtml2canvasServiceModule = NcHtml2canvasServiceModule;
Object.defineProperty(exports, '__esModule', { value: true });
}));
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