ng-thermal-print
Version:
An angular module to add thermal printing capabilities.
92 lines • 9.46 kB
JavaScript
import { PrintBuilder } from './PrintBuilder';
import { PrintBuffer } from "./PrintBuffer";
const ESC = 0x1b;
const GS = 0x1D;
export class EscBuilder extends PrintBuilder {
constructor() {
super();
this.encoder = new TextEncoder();
}
init() {
this.buffer = new PrintBuffer();
this.write(ESC);
this.write("@");
return this;
}
flush() {
return this.buffer.flush();
}
feed(lineCount = 1) {
this.write(ESC);
this.write("d");
this.write(lineCount);
return this;
}
cut(cutType = 'full') {
this.write(GS);
this.write("V");
this.write(cutType === 'full' ? 1 : 0);
return this;
}
writeLine(value) {
return this.write(`${value}\n`);
}
setInverse(inverse = true) {
this.write(GS);
this.write("B");
this.write(inverse ? 1 : 0);
return this;
}
setUnderline(value = true) {
this.write(ESC);
this.write("-");
this.write(value ? 1 : 0);
return this;
}
setJustification(value = 'left') {
let alignment;
switch (value) {
case "center":
alignment = 1;
break;
case "right":
alignment = 2;
break;
default:
alignment = 0;
break;
}
this.write(ESC);
this.write("a");
this.write(alignment);
return this;
}
setBold(bold = true) {
this.write(ESC);
this.write("E");
this.write(bold ? 1 : 0);
return this;
}
/**
@param mode 0, 0x30
*/
setSize(size = 'normal') {
this.write(ESC);
this.write("!");
this.write((size === 'normal') ? 0 : 0x30);
return this;
}
write(value) {
if (typeof value === "number") {
this.buffer.writeUInt8(value);
}
else if (typeof value === "string") {
this.buffer.write(this.encoder.encode(value));
}
else {
this.buffer.write(value);
}
return this;
}
}
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