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+interface PrintFunction {
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+ extendOptions: Function;
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+ getStyle: Function;
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+ setDomHeight: Function;
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+ toPrint: Function;
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+}
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+
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+const Print = function (dom, options?: object): PrintFunction {
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+ options = options || {};
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+ // @ts-expect-error
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+ if (!(this instanceof Print)) return new Print(dom, options);
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+ this.conf = {
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+ styleStr: "",
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+ // Elements that need to dynamically get and set the height
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+ setDomHeightArr: [],
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+ // Echart dom List
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+ echartDomArr: [],
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+ // Callback before printing
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+ printBeforeFn: null,
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+ // Callback after printing
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+ printDoneCallBack: null
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+ };
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+ for (const key in this.conf) {
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+ // eslint-disable-next-line no-prototype-builtins
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+ if (key && options.hasOwnProperty(key)) {
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+ this.conf[key] = options[key];
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+ }
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+ }
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+ if (typeof dom === "string") {
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+ this.dom = document.querySelector(dom);
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+ } else {
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+ this.dom = this.isDOM(dom) ? dom : dom.$el;
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+ }
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+ if (this.conf.setDomHeightArr && this.conf.setDomHeightArr.length) {
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+ this.setDomHeight(this.conf.setDomHeightArr);
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+ }
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+ this.init();
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+};
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+
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+Print.prototype = {
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+ /**
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+ * init
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+ */
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+ init: function (): void {
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+ const content = this.getStyle() + this.getHtml();
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+ this.writeIframe(content);
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+ },
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+ /**
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+ * Configuration property extension
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+ * @param {Object} obj
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+ * @param {Object} obj2
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+ */
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+ extendOptions: function <T>(obj, obj2: T): T {
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+ for (const k in obj2) {
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+ obj[k] = obj2[k];
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+ }
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+ return obj;
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+ },
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+ /**
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+ Copy all styles of the original page
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+ */
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+ getStyle: function (): string {
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+ let str = "";
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+ const styles: NodeListOf<Element> = document.querySelectorAll("style,link");
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+ for (let i = 0; i < styles.length; i++) {
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+ str += styles[i].outerHTML;
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+ }
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+ str += `<style>.no-print{display:none;}${this.conf.styleStr}</style>`;
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+ return str;
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+ },
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+ // form assignment
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+ getHtml: function (): Element {
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+ const inputs = document.querySelectorAll("input");
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+ const selects = document.querySelectorAll("select");
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+ const textareas = document.querySelectorAll("textarea");
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+ for (let k = 0; k < inputs.length; k++) {
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+ if (inputs[k].type == "checkbox" || inputs[k].type == "radio") {
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+ if (inputs[k].checked == true) {
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+ inputs[k].setAttribute("checked", "checked");
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+ } else {
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+ inputs[k].removeAttribute("checked");
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+ }
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+ } else if (inputs[k].type == "text") {
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+ inputs[k].setAttribute("value", inputs[k].value);
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+ } else {
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+ inputs[k].setAttribute("value", inputs[k].value);
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+ }
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+ }
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+
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+ for (let k2 = 0; k2 < textareas.length; k2++) {
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+ if (textareas[k2].type == "textarea") {
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+ textareas[k2].innerHTML = textareas[k2].value;
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+ }
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+ }
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+
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+ for (let k3 = 0; k3 < selects.length; k3++) {
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+ if (selects[k3].type == "select-one") {
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+ const child = selects[k3].children;
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+ for (const i in child) {
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+ if (child[i].tagName == "OPTION") {
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+ // @ts-ignore
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+ if (child[i].selected == true) {
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+ child[i].setAttribute("selected", "selected");
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+ } else {
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+ child[i].removeAttribute("selected");
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+ }
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+ }
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+ }
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+ }
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+ }
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+
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+ return this.dom.outerHTML;
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+ },
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+ /**
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+ create iframe
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+ */
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+ writeIframe: function (content) {
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+ let w: Document | Window;
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+ let doc: Document;
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+ const iframe: HTMLIFrameElement = document.createElement("iframe");
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+ const f: HTMLIFrameElement = document.body.appendChild(iframe);
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+ iframe.id = "myIframe";
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+ iframe.setAttribute(
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+ "style",
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+ "position:absolute;width:0;height:0;top:-10px;left:-10px;"
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+ );
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+ // eslint-disable-next-line prefer-const
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+ w = f.contentWindow || f.contentDocument;
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+ // eslint-disable-next-line prefer-const
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+ doc = f.contentDocument || f.contentWindow.document;
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+ doc.open();
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+ doc.write(content);
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+ doc.close();
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+ // eslint-disable-next-line @typescript-eslint/no-this-alias
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+ const _this = this;
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+ iframe.onload = function (): void {
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+ // Before popping, callback
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+ if (_this.conf.printBeforeFn) {
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+ _this.conf.printBeforeFn({ doc });
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+ }
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+
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+ _this.drawEchartImg(doc).then(() => {
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+ _this.toPrint(w);
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+ setTimeout(function () {
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+ document.body.removeChild(iframe);
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+ // After popup, callback
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+ if (_this.conf.printDoneCallBack) {
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+ _this.conf.printDoneCallBack();
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+ }
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+ }, 100);
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+ });
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+ };
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+ },
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+ /**
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+ * echarts printing
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+ * @param {Object} doc iframe window
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+ */
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+ drawEchartImg(doc): Promise<void> {
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+ return new Promise<void>(resolve => {
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+ if (this.conf.echartDomArr && this.conf.echartDomArr.length > 0) {
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+ this.conf.echartDomArr.forEach(e => {
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+ const dom = doc.querySelector("#" + e.$el.id);
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+ const img = new Image();
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+ const w = dom.offsetWidth + "px";
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+ const H = dom.offsetHeight + "px";
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+
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+ img.style.width = w;
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+ img.style.height = H;
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+ img.src = e.imgSrc;
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+ dom.innerHTML = "";
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+ dom.appendChild(img);
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+ });
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+ }
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+ resolve();
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+ });
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+ },
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+ /**
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+ Print
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+ */
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+ toPrint: function (frameWindow): void {
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+ try {
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+ setTimeout(function () {
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+ frameWindow.focus();
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+ try {
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+ if (!frameWindow.document.execCommand("print", false, null)) {
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+ frameWindow.print();
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+ }
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+ } catch (e) {
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+ frameWindow.print();
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+ }
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+ frameWindow.close();
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+ }, 10);
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+ } catch (err) {
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+ console.error(err);
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+ }
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+ },
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+ isDOM:
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+ typeof HTMLElement === "object"
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+ ? function (obj) {
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+ return obj instanceof HTMLElement;
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+ }
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+ : function (obj) {
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+ return (
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+ obj &&
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+ typeof obj === "object" &&
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+ obj.nodeType === 1 &&
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+ typeof obj.nodeName === "string"
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+ );
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+ },
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+ /**
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+ * Set the height of the specified dom element by getting the existing height of the dom element and setting
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+ * @param {Array} arr
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+ */
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+ setDomHeight(arr) {
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+ if (arr && arr.length) {
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+ arr.forEach(name => {
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+ const domArr = document.querySelectorAll(name);
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+ domArr.forEach(dom => {
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+ dom.style.height = dom.offsetHeight + "px";
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+ });
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+ });
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+ }
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+ }
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+};
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+
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+export default Print;
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