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162 lines
3.7 KiB
JavaScript
162 lines
3.7 KiB
JavaScript
const commands = require('./commands');
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const gbk = require('./gbk');
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const printerJobs = function() {
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this._queue = Array.from(commands.HARDWARE.HW_INIT);
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this._enqueue = function(cmd) {
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this._queue.push.apply(this._queue, cmd);
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}
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};
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/**
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* 增加打印内容
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* @param {string} content 文字内容
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*/
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printerJobs.prototype.text = function(content) {
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if (content) {
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let uint8Array = gbk.encode(content);
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let encoded = Array.from(uint8Array);
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this._enqueue(encoded);
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}
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return this;
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};
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/**
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* 打印文字
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* @param {string} content 文字内容
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*/
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printerJobs.prototype.print = function(content) {
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this.text(content);
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this._enqueue(commands.LF);
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return this;
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};
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/**
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* 打印文字并换行
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* @param {string} content 文字内容
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*/
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printerJobs.prototype.println = function(content = '') {
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return this.print(content + commands.EOL);
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};
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/**
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* 设置对齐方式
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* @param {string} align 对齐方式 LT/CT/RT
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*/
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printerJobs.prototype.setAlign = function(align) {
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this._enqueue(commands.TEXT_FORMAT['TXT_ALIGN_' + align.toUpperCase()]);
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return this;
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};
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/**
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* 设置字体
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* @param {string} family A/B/C
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*/
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printerJobs.prototype.setFont = function(family) {
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this._enqueue(commands.TEXT_FORMAT['TXT_FONT_' + family.toUpperCase()]);
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return this;
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};
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/**
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* 设定字体尺寸
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* @param {number} width 字体宽度 1~2
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* @param {number} height 字体高度 1~2
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*/
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printerJobs.prototype.setSize = function(width, height) {
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if (2 >= width && 2 >= height) {
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this._enqueue(commands.TEXT_FORMAT.TXT_NORMAL);
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if (2 === width && 2 === height) {
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this._enqueue(commands.TEXT_FORMAT.TXT_4SQUARE);
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} else if (1 === width && 2 === height) {
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this._enqueue(commands.TEXT_FORMAT.TXT_2HEIGHT);
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} else if (2 === width && 1 === height) {
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this._enqueue(commands.TEXT_FORMAT.TXT_2WIDTH);
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}
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}
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return this;
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};
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/**
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* 设定字体是否加粗
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* @param {boolean} bold
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*/
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printerJobs.prototype.setBold = function(bold) {
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if (typeof bold !== 'boolean') {
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bold = true;
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}
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this._enqueue(bold ? commands.TEXT_FORMAT.TXT_BOLD_ON : commands.TEXT_FORMAT.TXT_BOLD_OFF);
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return this;
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};
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/**
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* 设定是否开启下划线
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* @param {boolean} underline
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*/
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printerJobs.prototype.setUnderline = function(underline) {
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if (typeof underline !== 'boolean') {
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underline = true;
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}
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this._enqueue(underline ? commands.TEXT_FORMAT.TXT_UNDERL_ON : commands.TEXT_FORMAT.TXT_UNDERL_OFF);
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return this;
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};
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/**
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* 设置行间距为 n 点行,默认值行间距是 30 点
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* @param {number} n 0≤n≤255
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*/
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printerJobs.prototype.setLineSpacing = function(n) {
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if (n === undefined || n === null) {
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this._enqueue(commands.LINE_SPACING.LS_DEFAULT);
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} else {
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this._enqueue(commands.LINE_SPACING.LS_SET);
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this._enqueue([n]);
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}
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return this;
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};
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/**
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* 打印空行
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* @param {number} n
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*/
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printerJobs.prototype.lineFeed = function(n = 1) {
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return this.print(new Array(n).fill(commands.EOL).join(''));
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};
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/**
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* 设置字体颜色，需要打印机支持
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* @param {number} color - 0 默认颜色黑色 1 红色
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*/
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printerJobs.prototype.setColor = function(color) {
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this._enqueue(commands.COLOR[color === 1 ? 1 : 0]);
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return this;
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};
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/**
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* https://support.loyverse.com/hardware/printers/use-the-beeper-in-a-escpos-printers
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* 蜂鸣警报，需要打印机支持
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* @param {number} n 蜂鸣次数,1-9
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* @param {number} t 蜂鸣长短,1-9
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*/
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printerJobs.prototype.beep = function(n, t) {
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this._enqueue(commands.BEEP);
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this._enqueue([n, t]);
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return this;
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};
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/**
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* 清空任务
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*/
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printerJobs.prototype.clear = function() {
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this._queue = Array.from(commands.HARDWARE.HW_INIT);
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return this;
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};
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/**
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* 返回ArrayBuffer
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*/
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printerJobs.prototype.buffer = function() {
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return new Uint8Array(this._queue).buffer;
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};
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module.exports = printerJobs;
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