html-to-image
Version:
Generates an image from a DOM node using HTML5 canvas and SVG.
132 lines • 6.48 kB
JavaScript
;
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) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
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]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
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;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.cloneNode = void 0;
var clonePseudoElements_1 = require("./clonePseudoElements");
var util_1 = require("./util");
function cloneSingleNode(node) {
return __awaiter(this, void 0, void 0, function () {
var dataURL;
return __generator(this, function (_a) {
if (node instanceof HTMLCanvasElement) {
dataURL = node.toDataURL();
if (dataURL === 'data:,') {
return [2 /*return*/, Promise.resolve(node.cloneNode(false))];
}
return [2 /*return*/, util_1.createImage(dataURL)];
}
// if (node.tagName && node.tagName.toLowerCase() === 'svg') {
// return Promise.resolve(node as SVGElement)
// .then((svg) => svgToDataURL(svg))
// .then(createImage)
// }
return [2 /*return*/, Promise.resolve(node.cloneNode(false))];
});
});
}
function cloneChildren(nativeNode, clonedNode, filter) {
return __awaiter(this, void 0, void 0, function () {
var children;
return __generator(this, function (_a) {
children = util_1.toArray(nativeNode.childNodes);
if (children.length === 0) {
return [2 /*return*/, Promise.resolve(clonedNode)];
}
return [2 /*return*/, children
.reduce(function (done, child) {
return done
.then(function () { return cloneNode(child, filter); })
.then(function (clonedChild) {
if (clonedChild) {
clonedNode.appendChild(clonedChild);
}
});
}, Promise.resolve())
.then(function () { return clonedNode; })];
});
});
}
function decorate(nativeNode, clonedNode) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
if (!(clonedNode instanceof Element)) {
return [2 /*return*/, clonedNode];
}
return [2 /*return*/, Promise.resolve()
.then(function () { return cloneCssStyle(nativeNode, clonedNode); })
.then(function () { return clonePseudoElements_1.clonePseudoElements(nativeNode, clonedNode); })
.then(function () { return cloneInputValue(nativeNode, clonedNode); })
.then(function () { return clonedNode; })];
});
});
}
function cloneCssStyle(nativeNode, clonedNode) {
var source = window.getComputedStyle(nativeNode);
var target = clonedNode.style;
if (source.cssText) {
target.cssText = source.cssText;
}
else {
util_1.toArray(source).forEach(function (name) {
target.setProperty(name, source.getPropertyValue(name), source.getPropertyPriority(name));
});
}
}
function cloneInputValue(nativeNode, clonedNode) {
if (nativeNode instanceof HTMLTextAreaElement) {
clonedNode.innerHTML = nativeNode.value;
}
if (nativeNode instanceof HTMLInputElement) {
clonedNode.setAttribute('value', nativeNode.value);
}
}
function cloneNode(nativeNode, filter, isRoot) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
if (!isRoot && filter && !filter(nativeNode)) {
return [2 /*return*/, Promise.resolve(null)];
}
return [2 /*return*/, Promise.resolve(nativeNode)
.then(cloneSingleNode)
.then(function (clonedNode) { return cloneChildren(nativeNode, clonedNode, filter); })
.then(function (clonedNode) { return decorate(nativeNode, clonedNode); })];
});
});
}
exports.cloneNode = cloneNode;
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