fixed bug with getTextSize() which was throwing a JS error if used before adding text to the stage

dist/kinetic-core.js

@@ -2475,7 +2475,12 @@ Kinetic.Shape.prototype = {
      * .getContext() returns the context of the invisible path layer.
      */
     getContext: function() {
-        return this.tempLayer.getContext();
+        if(this.tempLayer === undefined) {
+            return null;
+        }
+        else {
+            return this.tempLayer.getContext();
+        }
     },
     /**
      * get shape temp layer canvas
@@ -3598,6 +3603,17 @@ Kinetic.Text.prototype = {
      */
     getTextSize: function() {
         var context = this.getContext();
+        
+        /**
+         * if the text hasn't been added a layer yet there
+         * will be no associated context.  Will have to create
+         * a dummy context
+         */
+        if (!context) {
+        	var dummyCanvas = document.createElement('canvas');
+        	context = dummyCanvas.getContext('2d');
+        }
+        
         context.save();
         context.font = this.attrs.fontStyle + ' ' + this.attrs.fontSize + 'pt ' + this.attrs.fontFamily;
         var metrics = context.measureText(this.attrs.text);

src/Shape.js

@@ -48,7 +48,12 @@ Kinetic.Shape.prototype = {
      * .getContext() returns the context of the invisible path layer.
      */
     getContext: function() {
-        return this.tempLayer.getContext();
+        if(this.tempLayer === undefined) {
+            return null;
+        }
+        else {
+            return this.tempLayer.getContext();
+        }
     },
     /**
      * get shape temp layer canvas

src/shapes/Text.js

@@ -234,6 +234,17 @@ Kinetic.Text.prototype = {
      */
     getTextSize: function() {
         var context = this.getContext();
+        
+        /**
+         * if the text hasn't been added a layer yet there
+         * will be no associated context.  Will have to create
+         * a dummy context
+         */
+        if (!context) {
+        	var dummyCanvas = document.createElement('canvas');
+        	context = dummyCanvas.getContext('2d');
+        }
+        
         context.save();
         context.font = this.attrs.fontStyle + ' ' + this.attrs.fontSize + 'pt ' + this.attrs.fontFamily;
         var metrics = context.measureText(this.attrs.text);

tests/js/unitTests.js

@@ -1936,6 +1936,9 @@ Test.prototype.tests = {
             verticalAlign: 'middle'
         });
 
+		// test text width before adding it to stage
+		test(text.getTextWidth() > 0, 'text width should have a value');
+		
         layer.add(text);
         stage.add(layer);