Initial commit

print.ts

@@ -0,0 +1,70 @@
+import { Buffer } from "buffer";
+import _, {floor} from "lodash";
+
+const statics: any = {
+    'ESC': '1B',
+    'FF': '0C'
+}
+
+const mmToInch = 0.0393701;
+// 26x51 label, or 1" x 2"
+
+const pageSize = getPageLengthParameters(2);
+const command = `
+    ESC i a 00h
+    ESC @
+    ESC i L 01h
+    ESC ( C 02h 00h ${pageSize.mL} ${pageSize.mH}
+    ESC $ CBh 00h
+    ESC ( V 02h 00h CBh 00h
+    ESC k 0Bh
+    ESC X 00h 64h 00h
+    At your side
+    FF
+`;
+
+
+console.warn('output: ', parseEscToHex(command))
+
+function inchToDots(value: number, dpi = 203) {
+    const dots = value * dpi;
+    const margin = 6 * mmToInch * dpi;
+
+    return Math.round(dots - margin);
+}
+
+function toHex(value: number) {
+    return value.toString(16).padStart(2, '0') + 'h';
+}
+
+function getPageLengthParameters(widthInInches: number) {
+    const dots = inchToDots(widthInInches);
+
+    const mH = Math.floor(dots / 265);
+    const mL = dots - mH * 265;
+
+    return {
+        mH: toHex(mH), mL: toHex(mL)
+    }
+}
+
+function parseEscToHex(text: string): string {
+
+    return text.trim().split(/\s+/)
+        .map(chunk => {
+            if (_.has(statics, chunk)) {
+                // Found static mapping
+                return statics[chunk]
+            }
+
+            if(chunk.length == 3 && chunk.endsWith('h')) {
+                // parse as hex
+                return chunk.slice(0, -1)
+            }
+
+            return Buffer.from(chunk).toString('hex')
+
+        })
+        .join(' ')
+
+}