html-to-image
Version:
Generates an image from a DOM node using HTML5 canvas and SVG.
138 lines • 7.19 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.toBlob = exports.toJpeg = exports.toPng = exports.toPixelData = exports.toCanvas = exports.toSvgDataURL = exports.toSvg = void 0;
var cloneNode_1 = require("./cloneNode");
var embedImages_1 = require("./embedImages");
var embedWebFonts_1 = require("./embedWebFonts");
var createSvgDataURL_1 = require("./createSvgDataURL");
var applyStyleWithOptions_1 = require("./applyStyleWithOptions");
var util_1 = require("./util");
function getImageSize(domNode, options) {
if (options === void 0) { options = {}; }
var width = options.width || util_1.getNodeWidth(domNode);
var height = options.height || util_1.getNodeHeight(domNode);
return { width: width, height: height };
}
function toSvg(domNode, options) {
if (options === void 0) { options = {}; }
return __awaiter(this, void 0, void 0, function () {
var _a, width, height;
return __generator(this, function (_b) {
_a = getImageSize(domNode, options), width = _a.width, height = _a.height;
return [2 /*return*/, cloneNode_1.cloneNode(domNode, options.filter, true)
.then(function (clonedNode) { return embedWebFonts_1.embedWebFonts(clonedNode, options); })
.then(function (clonedNode) { return embedImages_1.embedImages(clonedNode, options); })
.then(function (clonedNode) { return applyStyleWithOptions_1.applyStyleWithOptions(clonedNode, options); })
.then(function (clonedNode) { return createSvgDataURL_1.createSvgDataURL(clonedNode, width, height); })];
});
});
}
exports.toSvg = toSvg;
exports.toSvgDataURL = toSvg;
function toCanvas(domNode, options) {
if (options === void 0) { options = {}; }
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, toSvg(domNode, options)
.then(util_1.createImage)
.then(util_1.delay(100))
.then(function (image) {
var canvas = document.createElement('canvas');
var context = canvas.getContext('2d');
var ratio = options.pixelRatio || util_1.getPixelRatio();
var _a = getImageSize(domNode, options), width = _a.width, height = _a.height;
canvas.width = width * ratio;
canvas.height = height * ratio;
canvas.style.width = "" + width;
canvas.style.height = "" + height;
if (options.backgroundColor) {
context.fillStyle = options.backgroundColor;
context.fillRect(0, 0, canvas.width, canvas.height);
}
context.drawImage(image, 0, 0);
return canvas;
})];
});
});
}
exports.toCanvas = toCanvas;
function toPixelData(domNode, options) {
if (options === void 0) { options = {}; }
return __awaiter(this, void 0, void 0, function () {
var _a, width, height;
return __generator(this, function (_b) {
_a = getImageSize(domNode, options), width = _a.width, height = _a.height;
return [2 /*return*/, toCanvas(domNode, options).then(function (canvas) {
var ctx = canvas.getContext('2d');
return ctx.getImageData(0, 0, width, height).data;
})];
});
});
}
exports.toPixelData = toPixelData;
function toPng(domNode, options) {
if (options === void 0) { options = {}; }
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, toCanvas(domNode, options).then(function (canvas) { return canvas.toDataURL(); })];
});
});
}
exports.toPng = toPng;
function toJpeg(domNode, options) {
if (options === void 0) { options = {}; }
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, toCanvas(domNode, options).then(function (canvas) {
return canvas.toDataURL('image/jpeg', options.quality || 1);
})];
});
});
}
exports.toJpeg = toJpeg;
function toBlob(domNode, options) {
if (options === void 0) { options = {}; }
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, toCanvas(domNode, options).then(util_1.canvasToBlob)];
});
});
}
exports.toBlob = toBlob;
//# sourceMappingURL=index.js.map