easydo-mes-web/src/utils/print.js

// 打印类属性、方法定义
/* eslint-disable */
const Print = function(dom, options) {
	if (!(this instanceof Print)) return new Print(dom, options);

	this.options = this.extend({
		'noPrint': '.no-print'
	}, options);

	if ((typeof dom) === "string") {
		try{
			this.dom = document.querySelector(dom);
		}catch{
			var createDom = document.createElement("div")
				createDom.innerHTML = dom
			this.dom = createDom;
		};
	} else {
		this.isDOM(dom)
		this.dom = this.isDOM(dom) ? dom : dom.$el;
	}

	this.init();
};
Print.prototype = {
	init: function() {
		var content = this.getStyle() + this.getHtml();
		this.writeIframe(content);
	},
	extend: function(obj, obj2) {
		for (var k in obj2) {
			obj[k] = obj2[k];
		}
		return obj;
	},

	getStyle: function() {
		var str = "", styles = document.querySelectorAll('style,link');
		for (var i = 0; i < styles.length; i++) {
			str += styles[i].outerHTML;
		}
		str += "<style>" + (this.options.noPrint ? this.options.noPrint : '.no-print') + "{display:none;}</style>";
		str += "<style>html,body{background-color:#fff;}</style>";
		return str;
	},

	getHtml: function() {
		var inputs = document.querySelectorAll('input');
		var textareas = document.querySelectorAll('textarea');
		var selects = document.querySelectorAll('select');

		for (var k = 0; k < inputs.length; k++) {
			if (inputs[k].type == "checkbox" || inputs[k].type == "radio") {
				if (inputs[k].checked == true) {
					inputs[k].setAttribute('checked', "checked")
				} else {
					inputs[k].removeAttribute('checked')
				}
			} else if (inputs[k].type == "text") {
				inputs[k].setAttribute('value', inputs[k].value)
			} else {
				inputs[k].setAttribute('value', inputs[k].value)
			}
		}

		for (var k2 = 0; k2 < textareas.length; k2++) {
			if (textareas[k2].type == 'textarea') {
				textareas[k2].innerHTML = textareas[k2].value
			}
		}

		for (var k3 = 0; k3 < selects.length; k3++) {
			if (selects[k3].type == 'select-one') {
				var child = selects[k3].children;
				for (var i in child) {
					if (child[i].tagName == 'OPTION') {
						if (child[i].selected == true) {
							child[i].setAttribute('selected', "selected")
						} else {
							child[i].removeAttribute('selected')
						}
					}
				}
			}
		}

		return this.dom.outerHTML;
	},

	writeIframe: function(content) {
		var w, doc, iframe = document.createElement('iframe'), f = document.body.appendChild(iframe);
		iframe.id = "myIframe";
		//iframe.style = "position:absolute;width:0;height:0;top:-10px;left:-10px;";
		iframe.setAttribute('style', 'position:absolute;width:0;height:0;top:-10px;left:-10px;');
		w = f.contentWindow || f.contentDocument;
		doc = f.contentDocument || f.contentWindow.document;
		doc.open();
		doc.write(content);
		doc.close();
		var _this = this
		iframe.onload = function() {
			_this.toPrint(w);
			setTimeout(function() {
				document.body.removeChild(iframe)
			}, 100)
		}
	},

	toPrint: function(frameWindow) {
		try {
			setTimeout(function() {
				frameWindow.focus();
				try {
					if (!frameWindow.document.execCommand('print', false, null)) {
						frameWindow.print();
					}
				} catch (e) {
					frameWindow.print();
				}
				frameWindow.close();
			}, 10);
		} catch (err) {
			console.log('err', err);
		}
	},
	isDOM: (typeof HTMLElement === 'object') ?
		function(obj) {
			return obj instanceof HTMLElement;
		} : function(obj) {
			return obj && typeof obj === 'object' && obj.nodeType === 1 && typeof obj.nodeName === 'string';
		}
};

export default Print