perf: optimize BLE transmission throughput and fix layout truncation on basic receipts

static/src/js/bluetooth_printer_manager.js

@@ -455,24 +455,24 @@ export class BluetoothPrinterManager {
         try {
             this.isPrinting = true;
             const startTime = performance.now();
-            
+
-            // OPTIMIZED: Use safe chunks depending on transmission mode
+            // Use 128-byte chunks for all modes — this is the standard BLE ATT MTU payload size
-            // Large chunks (e.g. 512 bytes) overflow standard BLE serial buffers, truncating long receipts.
+            // and is well within the serial buffer of all common thermal printers.
-            // Graphics data is sent in highly compatible 128-byte chunks; text is sent in safe 20-byte chunks.
+            // Using only 20 bytes (the BLE minimum) is 6× slower and causes connection timeouts
-            const isGraphicsMode = isGraphics || escposData.length > 5000;
+            // on long receipts (many items), resulting in missing lines at the end.
-            const chunkSize = isGraphicsMode ? 128 : 20;
+            const chunkSize = 128;
-            
+
             const chunks = [];
             for (let i = 0; i < escposData.length; i += chunkSize) {
                 chunks.push(escposData.slice(i, i + chunkSize));
             }
 
-            console.log(`[Bluetooth] Sending ${chunks.length} chunks (${escposData.length} bytes, ${chunkSize} bytes/chunk, mode: ${isGraphicsMode ? 'graphics' : 'text'})`);
+            console.log(`[Bluetooth] Sending ${chunks.length} chunks (${escposData.length} bytes, ${chunkSize} bytes/chunk)`);
 
             // Prefer write with response if available for natural BLE flow control, fallback to write without response
             const useWrite = this.characteristic.properties.write;
             const useWriteWithoutResponse = this.characteristic.properties.writeWithoutResponse;
-            
+
             if (!useWrite && !useWriteWithoutResponse) {
                 throw new Error('Characteristic does not support write operations');
             }
@@ -483,25 +483,24 @@ export class BluetoothPrinterManager {
             // Send each chunk
             for (let i = 0; i < chunks.length; i++) {
                 const chunk = chunks[i];
-                
+
                 try {
                     if (writeWithAck) {
-                        // Safe write with response (OS/device level acknowledgment)
+                        // Write with response: OS provides ack, minimal sleep needed
                         await this.characteristic.writeValue(chunk);
-                        // Minimal safety sleep of 5ms between chunks
                         await this._sleep(5);
                     } else {
-                        // Write without response (needs explicit flow control to prevent buffer overrun)
+                        // Write without response: explicit flow control to prevent printer buffer overrun
                         await this.characteristic.writeValueWithoutResponse(chunk);
-                        
+
-                        // Adaptive sleep: base delay of 35ms, with 120ms flush every 8 chunks
+                        // 30ms between chunks; 80ms flush pause every 10 chunks
-                        if ((i + 1) % 8 === 0) {
+                        if ((i + 1) % 10 === 0) {
-                            await this._sleep(120);
+                            await this._sleep(80);
                         } else {
-                            await this._sleep(35);
+                            await this._sleep(30);
                         }
                     }
-                    
+
                     // Progress logging every 20%
                     if (i % Math.ceil(chunks.length / 5) === 0) {
                         const progress = Math.round((i / chunks.length) * 100);

static/src/js/escpos_generator.js

@@ -231,7 +231,7 @@ export class EscPosGenerator {
         if (receiptData.orderData) {
             const o = receiptData.orderData;
             if (receiptData.isBasicReceipt) {
-                // Basic receipt (table checker): all info at double height for readability
+                // Basic receipt (table checker): double-height for readability, keep full 32-char width
                 if (o.orderName) cmds.push(...this.addLine(`Order: ${o.orderName}`, { height: 2, bold: true }));
                 if (o.date)      cmds.push(...this.addLine(o.date, { height: 2 }));
                 if (o.cashier)   cmds.push(...this.addLine(`By: ${o.cashier}`, { height: 2 }));
@@ -256,16 +256,15 @@ export class EscPosGenerator {
 
                 if (receiptData.isBasicReceipt) {
                     // ── Basic receipt / table checker ──────────────────────────
-                    // Show only qty + product name (no price/total), at double-width
+                    // Show qty + product name at double HEIGHT only (keeps full 32-char width).
-                    // double-height for maximum readability on 58mm paper.
+                    // This ensures long product names are NOT truncated at 13 chars.
-                    // At width=2, each char is 2x wide, so effective cols = W/2 = 16
+                    // Format: "1  Pangsit Mie Ayam (Biasa)"
-                    const halfW = Math.floor(W / 2);
+                    const qtyLabel = qtyStr.padEnd(2) + '  ';
-                    const qtyLabel = qtyStr.padEnd(2) + ' ';
+                    const nameMaxLen = W - qtyLabel.length;
-                    const nameMaxLen = halfW - qtyLabel.length;
                     const displayName = name.length > nameMaxLen
                         ? name.substring(0, nameMaxLen - 1) + '.'
                         : name;
-                    cmds.push(...this.addLine(qtyLabel + displayName, { bold: true, width: 2, height: 2 }));
+                    cmds.push(...this.addLine(qtyLabel + displayName, { bold: true, height: 2 }));
                 } else {
                     // ── Full receipt ───────────────────────────────────────────
                     // Line 1: product name
@@ -289,10 +288,9 @@ export class EscPosGenerator {
                         const subQtyStr = subQty % 1 === 0 ? subQty.toFixed(0) : subQty.toFixed(2);
 
                         if (receiptData.isBasicReceipt) {
-                            // Double-height sub-lines on basic receipt
+                            // Double-height sub-lines, full 32-char width
-                            const halfW = Math.floor(W / 2);
+                            const prefix = `  ${subQtyStr}x `;
-                            const prefix = ` ${subQtyStr}x `;
+                            const maxSubLen = W - prefix.length;
-                            const maxSubLen = halfW - prefix.length;
                             const displaySub = subName.length > maxSubLen
                                 ? subName.substring(0, maxSubLen - 1) + '.'
                                 : subName;
@@ -314,8 +312,9 @@ export class EscPosGenerator {
                     const rawNote = String(line.note);
                     const rawLines = rawNote.split('\n');
                     const wrappedLines = [];
+                    // For basic receipt: full W chars available (height:2 only, not width:2)
                     const maxNoteWidth = W - 2;
-                    
+
                     rawLines.forEach(rawLine => {
                         const words = rawLine.split(/\s+/);
                         let currentLine = '';
@@ -339,9 +338,10 @@ export class EscPosGenerator {
                             wrappedLines.push(currentLine);
                         }
                     });
-                    
+
                     wrappedLines.forEach((l, i) => {
                         const prefix = i === 0 ? '* ' : '  ';
+                        // Both modes: bold, and double-height on basic receipt
                         if (receiptData.isBasicReceipt) {
                             cmds.push(...this.addLine(prefix + l, { bold: true, height: 2 }));
                         } else {

static/src/js/pos_receipt_printer.js

@@ -723,8 +723,19 @@ patch(PosPrinterService.prototype, {
             ? order.getOrderlines()
             : (order.lines || []);
 
+        const isBasic = !!this._currentPrintBasic;
         const lines = orderlines
-            .filter(line => !line.combo_parent_id)   // skip combo sub-lines
+            .filter(line => {
+                if (line.combo_parent_id) return false; // skip combo sub-lines
+                // On basic receipt: mirror the XML filter — exclude reward lines and
+                // lines with negative price/qty (same as receipt_overrides.xml t-if)
+                if (isBasic) {
+                    if (line.is_reward_line) return false;
+                    if ((line.price_unit || 0) < 0) return false;
+                    if ((line.qty || 0) < 0) return false;
+                }
+                return true;
+            })
             .map(line => {
                 const qty = line.qty || 0;