262 lines
6.0 KiB
JavaScript
262 lines
6.0 KiB
JavaScript
// 打印机纸宽58mm，页的宽度384，字符宽度为1，每行最多盛放32个字符
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// 打印机纸宽80mm，页的宽度576，字符宽度为1，每行最多盛放48个字符
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const PAGE_WIDTH = 576;
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const MAX_CHAR_COUNT_EACH_LINE = 48;
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//字符串转字节序列
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function stringToByte(str) {
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var bytes = new Array();
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var len, c;
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len = str.length;
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for (var i = 0; i < len; i++) {
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c = str.charCodeAt(i);
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if (c >= 0x010000 && c <= 0x10FFFF) {
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bytes.push(((c >> 18) & 0x07) | 0xF0);
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bytes.push(((c >> 12) & 0x3F) | 0x80);
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bytes.push(((c >> 6) & 0x3F) | 0x80);
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bytes.push((c & 0x3F) | 0x80);
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} else if (c >= 0x000800 && c <= 0x00FFFF) {
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bytes.push(((c >> 12) & 0x0F) | 0xE0);
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bytes.push(((c >> 6) & 0x3F) | 0x80);
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bytes.push((c & 0x3F) | 0x80);
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} else if (c >= 0x000080 && c <= 0x0007FF) {
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bytes.push(((c >> 6) & 0x1F) | 0xC0);
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bytes.push((c & 0x3F) | 0x80);
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} else {
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bytes.push(c & 0xFF);
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}
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}
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return bytes;
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}
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//字节序列转ASCII码
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//[0x24, 0x26, 0x28, 0x2A] ==> "$&C*"
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function byteToString(arr) {
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if (typeof arr === 'string') {
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return arr;
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}
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var str = '',
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_arr = arr;
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for (var i = 0; i < _arr.length; i++) {
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var one = _arr[i].toString(2),
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v = one.match(/^1+?(?=0)/);
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if (v && one.length == 8) {
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var bytesLength = v[0].length;
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var store = _arr[i].toString(2).slice(7 - bytesLength);
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for (var st = 1; st < bytesLength; st++) {
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store += _arr[st + i].toString(2).slice(2);
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}
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str += String.fromCharCode(parseInt(store, 2));
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i += bytesLength - 1;
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} else {
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str += String.fromCharCode(_arr[i]);
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}
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}
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return str;
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}
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//居中
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function Center() {
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var Center = [];
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Center.push(27);
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Center.push(97);
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Center.push(1);
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var strCenter = byteToString(Center);
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return strCenter;
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}
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//居左
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function Left() {
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var Left = [];
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Left.push(27);
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Left.push(97);
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Left.push(0);
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var strLeft = byteToString(Left);
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return strLeft;
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}
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//居右
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function Right() {
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var right = [];
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Left.push(27);
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Left.push(97);
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Left.push(2);
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var strRight = byteToString(right);
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return strRight;
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}
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//标准字体
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function Size1() {
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var Size1 = [];
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Size1.push(29);
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Size1.push(33);
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Size1.push(0);
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var strSize1 = byteToString(Size1);
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return strSize1;
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}
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//大号字体
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/* 放大1倍 n = 0
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* 长宽各放大2倍 n = 17 */
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function Size2(n) {
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var Size2 = [];
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Size2.push(29);
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Size2.push(33);
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Size2.push(n);
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var strSize2 = byteToString(Size2);
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return strSize2;
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}
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// 字体加粗
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function boldFontOn() {
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var arr = []
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arr.push(27)
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arr.push(69)
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arr.push(1)
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var cmd = byteToString(arr);
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return cmd
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}
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// 取消字体加粗
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function boldFontOff() {
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var arr = []
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arr.push(27)
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arr.push(69)
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arr.push(0)
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var cmd = byteToString(arr);
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return cmd
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}
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// 打印并走纸n行
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function feedLines(n = 1) {
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var feeds = []
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feeds.push(27)
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feeds.push(100)
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feeds.push(n)
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var printFeedsLines = byteToString(feeds);
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return printFeedsLines
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}
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// 切纸
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function cutPaper() {
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var cut = []
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cut.push(29)
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cut.push(86)
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cut.push(49)
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var cutType = byteToString(cut);
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return cutType
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}
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// 开钱箱
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function open_money_box() {
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var open = []
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open.push(27)
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open.push(112)
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open.push(0)
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open.push(60)
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open.push(255)
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var openType = byteToString(open)
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return openType
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}
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// 初始化打印机
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function init() {
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var arr = []
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arr.push(27)
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arr.push(68)
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arr.push(0)
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var str = byteToString(arr)
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return str
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}
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/*
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设置左边距
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len:
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*/
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function setLeftMargin(len = 1) {
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var arr = []
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arr.push(29)
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arr.push(76)
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arr.push(len)
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var str = byteToString(arr)
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return str
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}
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// 设置打印区域宽度
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function setPrintAreaWidth(width) {
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var arr = []
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arr.push(29)
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arr.push(87)
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arr.push(width)
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var str = byteToString(arr)
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return str
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}
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/**
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* @param str
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* @returns {boolean} str是否全是中文
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*/
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function isChinese(str) {
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return /^[\u4e00-\u9fa5]$/.test(str);
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}
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// str是否全含中文或者中文标点
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function isHaveChina(str) {
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if (escape(str).indexOf("%u") < 0) {
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return 0
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} else {
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return 1
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}
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}
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/**
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* 返回字符串宽度(1个中文=2个英文字符)
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* @param str
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* @returns {number}
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*/
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function getStringWidth(str) {
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let width = 0;
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for (let i = 0, len = str.length; i < len; i++) {
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width += isHaveChina(str.charAt(i)) ? 2 : 1;
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}
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return width;
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}
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/**
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* 同一行输出str1, str2，str1居左, str2居右
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* @param {string} str1 内容1
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* @param {string} str2 内容2
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* @param {string} fillWith str1 str2之间的填充字符
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* @param {number} fontWidth 字符宽度 1/2
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*
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*/
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function inline(str1, str2, fillWith = ' ', fontWidth = 1) {
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const lineWidth = MAX_CHAR_COUNT_EACH_LINE / fontWidth;
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// 需要填充的字符数量
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let fillCount = lineWidth - (getStringWidth(str1) + getStringWidth(str2)) % lineWidth;
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let fillStr = new Array(fillCount).fill(fillWith.charAt(0)).join('');
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return str1 + fillStr + str2;
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}
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/**
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* 用字符填充一整行
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* @param {string} fillWith 填充字符
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* @param {number} fontWidth 字符宽度 1/2
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*/
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function fillLine(fillWith = '-', fontWidth = 1) {
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const lineWidth = MAX_CHAR_COUNT_EACH_LINE / fontWidth;
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return new Array(lineWidth).fill(fillWith.charAt(0)).join('');
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}
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/**
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* 文字内容居中，左右用字符填充
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* @param {string} str 文字内容
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* @param {number} fontWidth 字符宽度 1/2
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* @param {string} fillWith str1 str2之间的填充字符
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*/
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function fillAround(str, fillWith = '-', fontWidth = 1) {
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const lineWidth = MAX_CHAR_COUNT_EACH_LINE / fontWidth;
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let strWidth = getStringWidth(str);
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// 内容已经超过一行了，没必要填充
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if (strWidth >= lineWidth) {
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return str;
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}
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// 需要填充的字符数量
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let fillCount = lineWidth - strWidth;
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// 左侧填充的字符数量
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let leftCount = Math.round(fillCount / 2);
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// 两侧的填充字符，需要考虑左边需要填充，右边不需要填充的情况
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let fillStr = new Array(leftCount).fill(fillWith.charAt(0)).join('');
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return fillStr + str + fillStr.substr(0, fillCount - leftCount);
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} |