print table object

lsongdev · Aug 20, 2019 · 8501d5d · 8501d5d
1 parent 34eef3a
commit 8501d5d
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diff --git a/README.md b/README.md
@@ -50,6 +50,12 @@ device.open(function(){
   .text('The quick brown fox jumps over the lazy dog')
   .text('敏捷的棕色狐狸跳过懒狗')
   .barcode('1234567', 'EAN8')
+  .table(["One", "Two", "Three"])
+  .tableCustom([ 
+    { text:"Left", align:"LEFT", width:0.33 },
+    { text:"Center", align:"CENTER", width:0.33},
+    { text:"Right", align:"RIGHT", width:0.33 }
+  ]) 
   .qrimage('https://github.com/song940/node-escpos', function(err){
     this.cut();
     this.close();

diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "escpos",
-  "version": "2.5.0",
+  "version": "2.5.1",
   "description": "ESC/POS Printer driver for nodejs",
   "main": "index.js",
   "scripts": {

diff --git a/printer.js b/printer.js
@@ -103,6 +103,15 @@ Printer.prototype.println = function (content) {
   return this.print(content + _.EOL);
 };
 
+/**
+ * [function print pure content with End Of Line]
+ * @param  {[String]}  content  [mandatory]
+ * @return {[Printer]} printer  [the escpos printer instance]
+ */
+Printer.prototype.newLine = function () {
+  return this.print( _.EOL);
+};
+
 /**
  * [function Print encoded alpha-numeric text with End Of Line]
  * @param  {[String]}  content  [mandatory]
@@ -113,6 +122,146 @@ Printer.prototype.text = function (content, encoding) {
   return this.print(iconv.encode(content + _.EOL, encoding || this.encoding));
 };
 
+
+/**
+ * [function Print draw line End Of Line]
+ 
+ * @return {[Printer]} printer  [the escpos printer instance]
+ */
+Printer.prototype.drawLine = function () {
+
+
+    // this.newLine();
+    for (var i = 0; i < 48; i++) {
+      this.buffer.write(Buffer.from("-"));
+    }
+    this.newLine();
+
+    return this;
+};
+
+
+
+/**
+ * [function Print  table   with End Of Line]
+ * @param  {[List]}  data  [mandatory]
+ * @param  {[String]}  encoding [optional]
+ * @return {[Printer]} printer  [the escpos printer instance]
+ */
+Printer.prototype.table = function (data, encoding) {
+
+
+  var cellWidth = 48 / data.length;
+  var lineTxt = "";
+
+  for (var i = 0; i < data.length; i++) {
+
+      lineTxt += data[i].toString();
+
+    var spaces = cellWidth - data[i].toString().length;
+    for (var j = 0; j < spaces; j++) {
+      lineTxt += " ";
+
+    }
+
+  }
+  this.buffer.write(iconv.encode(lineTxt+_.EOL , encoding || this.encoding));
+
+   return this;
+
+
+
+ };
+
+
+
+/**
+ * [function Print  custom table  with End Of Line]
+ * @param  {[List]}  data  [mandatory]
+ * @param  {[String]}  encoding [optional]
+ * @return {[Printer]} printer  [the escpos printer instance]
+ */
+Printer.prototype.tableCustom = function (data, encoding) {
+
+    var cellWidth = 48 / data.length;
+    var secondLine = [];
+    var secondLineEnabled = false;
+    var lineStr="";
+    for (var i = 0; i < data.length; i++) {
+      var tooLong = false;
+      var obj = data[i];
+      obj.text = obj.text.toString();
+
+      if (obj.width) {
+        cellWidth = 48 * obj.width;
+      } else if (obj.cols) {
+        cellWidth = obj.cols
+      }
+
+
+      // If text is too wide go to next line
+      if (cellWidth < obj.text.length) {
+        tooLong = true;
+        obj.originalText = obj.text;
+        obj.text = obj.text.substring(0, cellWidth - 1);
+      }
+
+      if (obj.align == "CENTER") {
+        var spaces = (cellWidth - obj.text.toString().length) / 2;
+        for (var j = 0; j < spaces; j++) {
+           lineStr +=" ";
+        }
+        if (obj.text != '') 
+          lineStr +=obj.text;
+
+        for (var j = 0; j < spaces - 1; j++) {
+          lineStr +=" ";
+        }
+
+      } else if (obj.align == "RIGHT") {
+        var spaces = cellWidth - obj.text.toString().length;
+        for (var j = 0; j < spaces; j++) {
+          lineStr +=" ";
+        }
+        if (obj.text != '') 
+        lineStr +=obj.text;
+
+      } else {
+        if (obj.text != '') 
+         lineStr +=obj.text;
+
+        var spaces = cellWidth - obj.text.toString().length;
+        for (var j = 0; j < spaces; j++) {
+          lineStr +=" ";
+        }
+
+      }
+
+
+
+      if (tooLong) {
+        secondLineEnabled = true;
+        obj.text = obj.originalText.substring(cellWidth - 1);
+        secondLine.push(obj);
+      } else {
+        obj.text = "";
+        secondLine.push(obj);
+      }
+    }
+    this.buffer.write(iconv.encode(lineStr+_.EOL , encoding || this.encoding));
+
+    // Print the second line
+    if (secondLineEnabled) {
+      this.tableCustom(secondLine);
+    }
+    else{
+    return this;
+    }
+
+ };
+
+
+
 /**
  * [function Print encoded alpha-numeric text without End Of Line]
  * @param  {[String]}  content  [mandatory]

diff --git a/test/test.js b/test/test.js
@@ -20,4 +20,51 @@ describe('ESC/POS printing test', function() {
     printer.print('hello world').flush();
   })
 
+  it('printer#print2', function(done){
+
+ const networkDevice = new escpos.Network('192.168.1.87', 9100);
+
+
+ const options = { encoding: "windows1254" /* default */ }
+ // encoding is optional
+
+ const printer = new escpos.Printer(networkDevice, options);
+
+
+
+ networkDevice.open(function(){
+  printer.tableCustom([                                       // Prints table with custom settings (text, align, width, cols,)
+    { text:"Left", align:"LEFT", width:0.33 },
+    { text:"Large Message for New Line  ", align:"LEFT", width:0.33  },
+    { text:"Right", align:"RIGHT", width:0.33 }
+  ]);
+  printer.tableCustom([                                       // Prints table with custom settings (text, align, width, cols)
+    { text:"Left", align:"LEFT", width:0.13 },
+    { text:"Left", align:"LEFT", width:0.10 },
+    { text:"Center", align:"CENTER", width:0.33 },
+    { text:"Right", align:"RIGHT", width:0.33 }
+  ]);
+  printer.drawLine();
+  printer.tableCustom([                                       // Prints table with custom settings (text, align, width, cols)
+    { text:"Left", align:"LEFT", width:0.33 },
+    { text:"Center", align:"CENTER", width:0.33},
+    { text:"Right", align:"RIGHT", width:0.33 }
+  ]);
+  printer.tableCustom([                                       // Prints table with custom settings (text, align, width, cols)
+    { text:"Left", align:"LEFT", width:0.33 },
+    { text:"Center", align:"CENTER", width:0.33 },
+    { text:"Right", align:"RIGHT", width:0.33 }
+  ]);
+  printer.newLine();
+  printer.newLine();
+  printer.newLine();
+  printer.newLine();
+   printer.cut();
+   printer.close();
+   printer.beep();
+
+   done();
+ });
+  })
+
 });