*se agrego extension labels

Author: gamalielmendez

README.md

@@ -98,5 +98,7 @@ pdf.Output('F',`test.pdf`);
 - [x] *Circle -  Dibuja un circulo*
 - [x] *DashedRect -  Dibuja un rectangulo con borde punteado*
 - [x] *subWrite - Escribe Texto De Diferentes tamaños*
+- [x] *Set_Font_Size_Label - establece el tamaño de la fuente de la etiqueta*
+- [x] *Add_Label - Agrega una etiqueta al documento*
 
  **Puedes encontrar ejemplos de uso [aqui](https://github.com/gamalielmendez/node-fpdf/tree/master/test)**

package.json

@@ -27,7 +27,8 @@
     "test18": "node ./test/RoundedRect.js",
     "test19": "node ./test/circle_ellipse.js",
     "test20": "node ./test/DashedRect.js",
-    "test21": "node ./test/subWrite.js"
+    "test21": "node ./test/subWrite.js",
+    "test22": "node ./test/labels_test.js"
   },
   "repository": {
     "type": "git",

src/extends/labels.js

@@ -0,0 +1,77 @@
+const { isset } = require('../PHP_CoreFunctions')
+
+function _Set_Format(parent, format) {
+
+    parent._Margin_Left = _Convert_Metric(parent, format['marginLeft'], format['metric']);
+    parent._Margin_Top = _Convert_Metric(parent, format['marginTop'], format['metric']);
+    parent._X_Space = _Convert_Metric(parent, format['SpaceX'], format['metric']);
+    parent._Y_Space = _Convert_Metric(parent, format['SpaceY'], format['metric']);
+    parent._X_Number = format['NX'];
+    parent._Y_Number = format['NY'];
+    parent._Width = _Convert_Metric(parent, format['width'], format['metric']);
+    parent._Height = _Convert_Metric(parent, format['height'], format['metric']);
+    _Set_Font_Size_Label(parent,format['font-size']);
+    parent._Padding = _Convert_Metric(parent, 3, 'mm');
+
+}
+
+// convert units (in to mm, mm to in)
+// $src must be 'in' or 'mm'
+function _Convert_Metric(parent, value, src) {
+
+    let dest = parent._Metric_Doc;
+
+    if (src !== dest) {
+        let a = { 'in': 39.37008, 'mm': 1000 }
+        return value * a[dest] / a[src];
+    } else {
+        return value;
+    }
+
+}
+
+// Give the line height for a given font size
+function _Get_Height_Chars(parent, pt) {
+
+    let a = { 6: 2, 7: 2.5, 8: 3, 9: 4, 10: 5, 11: 6, 12: 7, 13: 8, 14: 9, 15: 10 }
+    if (!isset(a[pt])) {
+        parent.Error('Invalid font size: '.pt);
+    }
+
+    return _Convert_Metric(parent, a[pt], 'mm');
+}
+
+// Set the character size
+// This changes the line height too
+function _Set_Font_Size_Label(parent, pt) {
+    parent._Line_Height = _Get_Height_Chars(parent, pt);
+    parent.SetFontSize(pt);
+}
+
+// Print a label
+function _Add_Label(parent, text) {
+    
+    parent._COUNTX++;
+    if (parent._COUNTX == parent._X_Number) {
+        // Row full, we start a new one
+        parent._COUNTX = 0;
+        parent._COUNTY++;
+        if (parent._COUNTY === parent._Y_Number) {
+            // End of page reached, we start a new one
+            parent._COUNTY = 0;
+            parent.AddPage();
+        }
+    }
+
+    let _PosX = parent._Margin_Left + parent._COUNTX * (parent._Width + parent._X_Space) + parent._Padding;
+    let _PosY = parent._Margin_Top + parent._COUNTY * (parent._Height + parent._Y_Space) + parent._Padding;
+    parent.SetXY(_PosX, _PosY);
+    parent.MultiCell(parent._Width - parent._Padding, parent._Line_Height, text, 0, 'L');
+
+}
+
+module.exports={
+    _Set_Font_Size_Label,
+    _Add_Label,
+    _Set_Format  
+}