mirror of
https://github.com/niklasvh/html2canvas.git
synced 2023-08-10 21:13:10 +03:00
190 lines
11 KiB
JavaScript
190 lines
11 KiB
JavaScript
"use strict";
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var __assign = (this && this.__assign) || function () {
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__assign = Object.assign || function(t) {
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for (var s, i = 1, n = arguments.length; i < n; i++) {
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s = arguments[i];
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for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
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t[p] = s[p];
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}
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return t;
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};
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return __assign.apply(this, arguments);
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};
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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var __generator = (this && this.__generator) || function (thisArg, body) {
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var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
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return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
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function verb(n) { return function (v) { return step([n, v]); }; }
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function step(op) {
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if (f) throw new TypeError("Generator is already executing.");
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while (_) try {
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if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
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if (y = 0, t) op = [op[0] & 2, t.value];
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switch (op[0]) {
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case 0: case 1: t = op; break;
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case 4: _.label++; return { value: op[1], done: false };
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case 5: _.label++; y = op[1]; op = [0]; continue;
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case 7: op = _.ops.pop(); _.trys.pop(); continue;
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default:
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if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
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if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
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if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
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if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
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if (t[2]) _.ops.pop();
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_.trys.pop(); continue;
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}
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op = body.call(thisArg, _);
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} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
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if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
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}
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};
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var _this = this;
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Object.defineProperty(exports, "__esModule", { value: true });
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var bounds_1 = require("./css/layout/bounds");
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var color_1 = require("./css/types/color");
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var parser_1 = require("./css/syntax/parser");
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var document_cloner_1 = require("./dom/document-cloner");
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var node_parser_1 = require("./dom/node-parser");
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var logger_1 = require("./core/logger");
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var cache_storage_1 = require("./core/cache-storage");
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var canvas_renderer_1 = require("./render/canvas/canvas-renderer");
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var foreignobject_renderer_1 = require("./render/canvas/foreignobject-renderer");
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var parseColor = function (value) { return color_1.color.parse(parser_1.Parser.create(value).parseComponentValue()); };
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var html2canvas = function (element, options) {
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if (options === void 0) { options = {}; }
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return renderElement(element, options);
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};
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exports.default = html2canvas;
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if (typeof window !== 'undefined') {
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cache_storage_1.CacheStorage.setContext(window);
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}
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var renderElement = function (element, opts) { return __awaiter(_this, void 0, void 0, function () {
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var ownerDocument, defaultView, instanceName, _a, width, height, left, top, defaultResourceOptions, resourceOptions, defaultOptions, options, windowBounds, documentCloner, clonedElement, container, documentBackgroundColor, bodyBackgroundColor, bgColor, defaultBackgroundColor, backgroundColor, renderOptions, canvas, renderer, root, renderer;
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return __generator(this, function (_b) {
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switch (_b.label) {
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case 0:
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ownerDocument = element.ownerDocument;
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if (!ownerDocument) {
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throw new Error("Element is not attached to a Document");
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}
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defaultView = ownerDocument.defaultView;
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if (!defaultView) {
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throw new Error("Document is not attached to a Window");
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}
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instanceName = (Math.round(Math.random() * 1000) + Date.now()).toString(16);
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_a = node_parser_1.isBodyElement(element) || node_parser_1.isHTMLElement(element) ? bounds_1.parseDocumentSize(ownerDocument) : bounds_1.parseBounds(element), width = _a.width, height = _a.height, left = _a.left, top = _a.top;
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defaultResourceOptions = {
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allowTaint: false,
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imageTimeout: 15000,
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proxy: undefined,
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useCORS: false
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};
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resourceOptions = __assign({}, defaultResourceOptions, opts);
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defaultOptions = {
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backgroundColor: '#ffffff',
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cache: opts.cache ? opts.cache : cache_storage_1.CacheStorage.create(instanceName, resourceOptions),
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logging: true,
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removeContainer: true,
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foreignObjectRendering: false,
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scale: defaultView.devicePixelRatio || 1,
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windowWidth: defaultView.innerWidth,
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windowHeight: defaultView.innerHeight,
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scrollX: defaultView.pageXOffset,
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scrollY: defaultView.pageYOffset,
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x: left,
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y: top,
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width: Math.ceil(width),
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height: Math.ceil(height),
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id: instanceName
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};
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options = __assign({}, defaultOptions, resourceOptions, opts);
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windowBounds = new bounds_1.Bounds(options.scrollX, options.scrollY, options.windowWidth, options.windowHeight);
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logger_1.Logger.create({ id: instanceName, enabled: options.logging });
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logger_1.Logger.getInstance(instanceName).debug("Starting document clone");
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documentCloner = new document_cloner_1.DocumentCloner(element, {
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id: instanceName,
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onclone: options.onclone,
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ignoreElements: options.ignoreElements,
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inlineImages: options.foreignObjectRendering,
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copyStyles: options.foreignObjectRendering
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});
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clonedElement = documentCloner.clonedReferenceElement;
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if (!clonedElement) {
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return [2 /*return*/, Promise.reject("Unable to find element in cloned iframe")];
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}
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return [4 /*yield*/, documentCloner.toIFrame(ownerDocument, windowBounds)];
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case 1:
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container = _b.sent();
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documentBackgroundColor = ownerDocument.documentElement
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? parseColor(getComputedStyle(ownerDocument.documentElement).backgroundColor)
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: color_1.COLORS.TRANSPARENT;
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bodyBackgroundColor = ownerDocument.body
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? parseColor(getComputedStyle(ownerDocument.body).backgroundColor)
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: color_1.COLORS.TRANSPARENT;
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bgColor = opts.backgroundColor;
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defaultBackgroundColor = typeof bgColor === 'string' ? parseColor(bgColor) : bgColor === null ? color_1.COLORS.TRANSPARENT : 0xffffffff;
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backgroundColor = element === ownerDocument.documentElement
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? color_1.isTransparent(documentBackgroundColor)
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? color_1.isTransparent(bodyBackgroundColor)
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? defaultBackgroundColor
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: bodyBackgroundColor
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: documentBackgroundColor
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: defaultBackgroundColor;
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renderOptions = {
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id: instanceName,
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cache: options.cache,
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canvas: options.canvas,
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backgroundColor: backgroundColor,
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scale: options.scale,
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x: options.x,
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y: options.y,
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scrollX: options.scrollX,
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scrollY: options.scrollY,
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width: options.width,
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height: options.height,
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windowWidth: options.windowWidth,
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windowHeight: options.windowHeight
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};
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if (!options.foreignObjectRendering) return [3 /*break*/, 3];
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logger_1.Logger.getInstance(instanceName).debug("Document cloned, using foreign object rendering");
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renderer = new foreignobject_renderer_1.ForeignObjectRenderer(renderOptions);
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return [4 /*yield*/, renderer.render(clonedElement)];
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case 2:
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canvas = _b.sent();
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return [3 /*break*/, 5];
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case 3:
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logger_1.Logger.getInstance(instanceName).debug("Document cloned, using computed rendering");
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cache_storage_1.CacheStorage.attachInstance(options.cache);
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logger_1.Logger.getInstance(instanceName).debug("Starting DOM parsing");
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root = node_parser_1.parseTree(clonedElement);
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cache_storage_1.CacheStorage.detachInstance();
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if (backgroundColor === root.styles.backgroundColor) {
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root.styles.backgroundColor = color_1.COLORS.TRANSPARENT;
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}
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logger_1.Logger.getInstance(instanceName).debug("Starting renderer");
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renderer = new canvas_renderer_1.CanvasRenderer(renderOptions);
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return [4 /*yield*/, renderer.render(root)];
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case 4:
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canvas = _b.sent();
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_b.label = 5;
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case 5:
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if (options.removeContainer === true) {
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if (!document_cloner_1.DocumentCloner.destroy(container)) {
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logger_1.Logger.getInstance(instanceName).error("Cannot detach cloned iframe as it is not in the DOM anymore");
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}
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}
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logger_1.Logger.getInstance(instanceName).debug("Finished rendering");
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logger_1.Logger.destroy(instanceName);
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cache_storage_1.CacheStorage.destroy(instanceName);
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return [2 /*return*/, canvas];
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}
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});
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}); };
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//# sourceMappingURL=index.js.map
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