pro3/node_modules/html2canvas/dist/lib/index.js

"use strict";
var __assign = (this && this.__assign) || function () {
    __assign = Object.assign || function(t) {
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            s = arguments[i];
            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
                t[p] = s[p];
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        return t;
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    return __assign.apply(this, arguments);
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
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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;
    function verb(n) { return function (v) { return step([n, v]); }; }
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            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
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};
Object.defineProperty(exports, "__esModule", { value: true });
var bounds_1 = require("./css/layout/bounds");
var color_1 = require("./css/types/color");
var document_cloner_1 = require("./dom/document-cloner");
var node_parser_1 = require("./dom/node-parser");
var cache_storage_1 = require("./core/cache-storage");
var canvas_renderer_1 = require("./render/canvas/canvas-renderer");
var foreignobject_renderer_1 = require("./render/canvas/foreignobject-renderer");
var context_1 = require("./core/context");
var html2canvas = function (element, options) {
    if (options === void 0) { options = {}; }
    return renderElement(element, options);
};
exports.default = html2canvas;
if (typeof window !== 'undefined') {
    cache_storage_1.CacheStorage.setContext(window);
}
var renderElement = function (element, opts) { return __awaiter(void 0, void 0, void 0, function () {
    var ownerDocument, defaultView, resourceOptions, contextOptions, windowOptions, windowBounds, context, foreignObjectRendering, cloneOptions, documentCloner, clonedElement, container, _a, width, height, left, top, backgroundColor, renderOptions, canvas, renderer, root, renderer;
    var _b, _c, _d, _e, _f, _g, _h, _j, _k, _l, _m, _o, _p, _q, _r, _s, _t;
    return __generator(this, function (_u) {
        switch (_u.label) {
            case 0:
                if (!element || typeof element !== 'object') {
                    return [2 /*return*/, Promise.reject('Invalid element provided as first argument')];
                }
                ownerDocument = element.ownerDocument;
                if (!ownerDocument) {
                    throw new Error("Element is not attached to a Document");
                }
                defaultView = ownerDocument.defaultView;
                if (!defaultView) {
                    throw new Error("Document is not attached to a Window");
                }
                resourceOptions = {
                    allowTaint: (_b = opts.allowTaint) !== null && _b !== void 0 ? _b : false,
                    imageTimeout: (_c = opts.imageTimeout) !== null && _c !== void 0 ? _c : 15000,
                    proxy: opts.proxy,
                    useCORS: (_d = opts.useCORS) !== null && _d !== void 0 ? _d : false
                };
                contextOptions = __assign({ logging: (_e = opts.logging) !== null && _e !== void 0 ? _e : true, cache: opts.cache }, resourceOptions);
                windowOptions = {
                    windowWidth: (_f = opts.windowWidth) !== null && _f !== void 0 ? _f : defaultView.innerWidth,
                    windowHeight: (_g = opts.windowHeight) !== null && _g !== void 0 ? _g : defaultView.innerHeight,
                    scrollX: (_h = opts.scrollX) !== null && _h !== void 0 ? _h : defaultView.pageXOffset,
                    scrollY: (_j = opts.scrollY) !== null && _j !== void 0 ? _j : defaultView.pageYOffset
                };
                windowBounds = new bounds_1.Bounds(windowOptions.scrollX, windowOptions.scrollY, windowOptions.windowWidth, windowOptions.windowHeight);
                context = new context_1.Context(contextOptions, windowBounds);
                foreignObjectRendering = (_k = opts.foreignObjectRendering) !== null && _k !== void 0 ? _k : false;
                cloneOptions = {
                    allowTaint: (_l = opts.allowTaint) !== null && _l !== void 0 ? _l : false,
                    onclone: opts.onclone,
                    ignoreElements: opts.ignoreElements,
                    inlineImages: foreignObjectRendering,
                    copyStyles: foreignObjectRendering
                };
                context.logger.debug("Starting document clone with size " + windowBounds.width + "x" + windowBounds.height + " scrolled to " + -windowBounds.left + "," + -windowBounds.top);
                documentCloner = new document_cloner_1.DocumentCloner(context, element, cloneOptions);
                clonedElement = documentCloner.clonedReferenceElement;
                if (!clonedElement) {
                    return [2 /*return*/, Promise.reject("Unable to find element in cloned iframe")];
                }
                return [4 /*yield*/, documentCloner.toIFrame(ownerDocument, windowBounds)];
            case 1:
                container = _u.sent();
                _a = node_parser_1.isBodyElement(clonedElement) || node_parser_1.isHTMLElement(clonedElement)
                    ? bounds_1.parseDocumentSize(clonedElement.ownerDocument)
                    : bounds_1.parseBounds(context, clonedElement), width = _a.width, height = _a.height, left = _a.left, top = _a.top;
                backgroundColor = parseBackgroundColor(context, clonedElement, opts.backgroundColor);
                renderOptions = {
                    canvas: opts.canvas,
                    backgroundColor: backgroundColor,
                    scale: (_o = (_m = opts.scale) !== null && _m !== void 0 ? _m : defaultView.devicePixelRatio) !== null && _o !== void 0 ? _o : 1,
                    x: ((_p = opts.x) !== null && _p !== void 0 ? _p : 0) + left,
                    y: ((_q = opts.y) !== null && _q !== void 0 ? _q : 0) + top,
                    width: (_r = opts.width) !== null && _r !== void 0 ? _r : Math.ceil(width),
                    height: (_s = opts.height) !== null && _s !== void 0 ? _s : Math.ceil(height)
                };
                if (!foreignObjectRendering) return [3 /*break*/, 3];
                context.logger.debug("Document cloned, using foreign object rendering");
                renderer = new foreignobject_renderer_1.ForeignObjectRenderer(context, renderOptions);
                return [4 /*yield*/, renderer.render(clonedElement)];
            case 2:
                canvas = _u.sent();
                return [3 /*break*/, 5];
            case 3:
                context.logger.debug("Document cloned, element located at " + left + "," + top + " with size " + width + "x" + height + " using computed rendering");
                context.logger.debug("Starting DOM parsing");
                root = node_parser_1.parseTree(context, clonedElement);
                if (backgroundColor === root.styles.backgroundColor) {
                    root.styles.backgroundColor = color_1.COLORS.TRANSPARENT;
                }
                context.logger.debug("Starting renderer for element at " + renderOptions.x + "," + renderOptions.y + " with size " + renderOptions.width + "x" + renderOptions.height);
                renderer = new canvas_renderer_1.CanvasRenderer(context, renderOptions);
                return [4 /*yield*/, renderer.render(root)];
            case 4:
                canvas = _u.sent();
                _u.label = 5;
            case 5:
                if ((_t = opts.removeContainer) !== null && _t !== void 0 ? _t : true) {
                    if (!document_cloner_1.DocumentCloner.destroy(container)) {
                        context.logger.error("Cannot detach cloned iframe as it is not in the DOM anymore");
                    }
                }
                context.logger.debug("Finished rendering");
                return [2 /*return*/, canvas];
        }
    });
}); };
var parseBackgroundColor = function (context, element, backgroundColorOverride) {
    var ownerDocument = element.ownerDocument;
    // http://www.w3.org/TR/css3-background/#special-backgrounds
    var documentBackgroundColor = ownerDocument.documentElement
        ? color_1.parseColor(context, getComputedStyle(ownerDocument.documentElement).backgroundColor)
        : color_1.COLORS.TRANSPARENT;
    var bodyBackgroundColor = ownerDocument.body
        ? color_1.parseColor(context, getComputedStyle(ownerDocument.body).backgroundColor)
        : color_1.COLORS.TRANSPARENT;
    var defaultBackgroundColor = typeof backgroundColorOverride === 'string'
        ? color_1.parseColor(context, backgroundColorOverride)
        : backgroundColorOverride === null
            ? color_1.COLORS.TRANSPARENT
            : 0xffffffff;
    return element === ownerDocument.documentElement
        ? color_1.isTransparent(documentBackgroundColor)
            ? color_1.isTransparent(bodyBackgroundColor)
                ? defaultBackgroundColor
                : bodyBackgroundColor
            : documentBackgroundColor
        : defaultBackgroundColor;
};
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