181 lines
11 KiB
JavaScript
181 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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function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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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) : adopt(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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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 document_cloner_1 = require("./dom/document-cloner");
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var node_parser_1 = require("./dom/node-parser");
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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 context_1 = require("./core/context");
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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(void 0, void 0, void 0, function () {
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var ownerDocument, defaultView, resourceOptions, contextOptions, windowOptions, windowBounds, context, foreignObjectRendering, cloneOptions, documentCloner, clonedElement, container, _a, width, height, left, top, backgroundColor, renderOptions, canvas, renderer, root, renderer;
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var _b, _c, _d, _e, _f, _g, _h, _j, _k, _l, _m, _o, _p, _q, _r, _s, _t;
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return __generator(this, function (_u) {
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switch (_u.label) {
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case 0:
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if (!element || typeof element !== 'object') {
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return [2 /*return*/, Promise.reject('Invalid element provided as first argument')];
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}
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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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resourceOptions = {
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allowTaint: (_b = opts.allowTaint) !== null && _b !== void 0 ? _b : false,
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imageTimeout: (_c = opts.imageTimeout) !== null && _c !== void 0 ? _c : 15000,
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proxy: opts.proxy,
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useCORS: (_d = opts.useCORS) !== null && _d !== void 0 ? _d : false
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};
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contextOptions = __assign({ logging: (_e = opts.logging) !== null && _e !== void 0 ? _e : true, cache: opts.cache }, resourceOptions);
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windowOptions = {
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windowWidth: (_f = opts.windowWidth) !== null && _f !== void 0 ? _f : defaultView.innerWidth,
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windowHeight: (_g = opts.windowHeight) !== null && _g !== void 0 ? _g : defaultView.innerHeight,
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scrollX: (_h = opts.scrollX) !== null && _h !== void 0 ? _h : defaultView.pageXOffset,
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scrollY: (_j = opts.scrollY) !== null && _j !== void 0 ? _j : defaultView.pageYOffset
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};
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windowBounds = new bounds_1.Bounds(windowOptions.scrollX, windowOptions.scrollY, windowOptions.windowWidth, windowOptions.windowHeight);
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context = new context_1.Context(contextOptions, windowBounds);
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foreignObjectRendering = (_k = opts.foreignObjectRendering) !== null && _k !== void 0 ? _k : false;
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cloneOptions = {
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allowTaint: (_l = opts.allowTaint) !== null && _l !== void 0 ? _l : false,
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onclone: opts.onclone,
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ignoreElements: opts.ignoreElements,
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inlineImages: foreignObjectRendering,
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copyStyles: foreignObjectRendering
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};
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context.logger.debug("Starting document clone with size " + windowBounds.width + "x" + windowBounds.height + " scrolled to " + -windowBounds.left + "," + -windowBounds.top);
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documentCloner = new document_cloner_1.DocumentCloner(context, element, cloneOptions);
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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 = _u.sent();
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_a = node_parser_1.isBodyElement(clonedElement) || node_parser_1.isHTMLElement(clonedElement)
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? bounds_1.parseDocumentSize(clonedElement.ownerDocument)
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: bounds_1.parseBounds(context, clonedElement), width = _a.width, height = _a.height, left = _a.left, top = _a.top;
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backgroundColor = parseBackgroundColor(context, clonedElement, opts.backgroundColor);
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renderOptions = {
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canvas: opts.canvas,
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backgroundColor: backgroundColor,
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scale: (_o = (_m = opts.scale) !== null && _m !== void 0 ? _m : defaultView.devicePixelRatio) !== null && _o !== void 0 ? _o : 1,
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x: ((_p = opts.x) !== null && _p !== void 0 ? _p : 0) + left,
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y: ((_q = opts.y) !== null && _q !== void 0 ? _q : 0) + top,
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width: (_r = opts.width) !== null && _r !== void 0 ? _r : Math.ceil(width),
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height: (_s = opts.height) !== null && _s !== void 0 ? _s : Math.ceil(height)
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};
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if (!foreignObjectRendering) return [3 /*break*/, 3];
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context.logger.debug("Document cloned, using foreign object rendering");
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renderer = new foreignobject_renderer_1.ForeignObjectRenderer(context, renderOptions);
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return [4 /*yield*/, renderer.render(clonedElement)];
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case 2:
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canvas = _u.sent();
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return [3 /*break*/, 5];
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case 3:
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context.logger.debug("Document cloned, element located at " + left + "," + top + " with size " + width + "x" + height + " using computed rendering");
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context.logger.debug("Starting DOM parsing");
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root = node_parser_1.parseTree(context, clonedElement);
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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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context.logger.debug("Starting renderer for element at " + renderOptions.x + "," + renderOptions.y + " with size " + renderOptions.width + "x" + renderOptions.height);
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renderer = new canvas_renderer_1.CanvasRenderer(context, renderOptions);
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return [4 /*yield*/, renderer.render(root)];
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case 4:
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canvas = _u.sent();
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_u.label = 5;
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case 5:
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if ((_t = opts.removeContainer) !== null && _t !== void 0 ? _t : true) {
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if (!document_cloner_1.DocumentCloner.destroy(container)) {
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context.logger.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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context.logger.debug("Finished rendering");
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return [2 /*return*/, canvas];
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}
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});
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}); };
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var parseBackgroundColor = function (context, element, backgroundColorOverride) {
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var ownerDocument = element.ownerDocument;
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// http://www.w3.org/TR/css3-background/#special-backgrounds
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var documentBackgroundColor = ownerDocument.documentElement
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? color_1.parseColor(context, getComputedStyle(ownerDocument.documentElement).backgroundColor)
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: color_1.COLORS.TRANSPARENT;
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var bodyBackgroundColor = ownerDocument.body
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? color_1.parseColor(context, getComputedStyle(ownerDocument.body).backgroundColor)
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: color_1.COLORS.TRANSPARENT;
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var defaultBackgroundColor = typeof backgroundColorOverride === 'string'
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? color_1.parseColor(context, backgroundColorOverride)
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: backgroundColorOverride === null
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? color_1.COLORS.TRANSPARENT
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: 0xffffffff;
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return 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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};
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//# sourceMappingURL=index.js.map
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