Fixes #157 (#159)

* Fixes #157

* Fixes #157

* Fixes #157

Author: Rouche

src/mask.js

@@ -77,13 +77,13 @@ angular.module('ui.mask', [])
                                     preventBackspace;
 
                             var originalIsEmpty = controller.$isEmpty;
-	                        controller.$isEmpty = function(value) {
-		                        if (maskProcessed) {
-			                        return originalIsEmpty(unmaskValue(value || ''));
-		                        } else {
-			                        return originalIsEmpty(value);
-		                        }
-	                        };
+                            controller.$isEmpty = function(value) {
+                                if (maskProcessed) {
+                                    return originalIsEmpty(unmaskValue(value || ''));
+                                } else {
+                                    return originalIsEmpty(value);
+                                }
+                            };
 
                             function initialize(maskAttr) {
                                 if (!angular.isDefined(maskAttr)) {
@@ -453,8 +453,21 @@ angular.module('ui.mask', [])
                                     }
                                 }
                                 //Check for different value and trigger change.
+                                //Check for different value and trigger change.
                                 if (value !== prevValue) {
+                                    // #157 Fix the bug from the trigger when backspacing exactly on the first letter (emptying the field)
+                                    // and then blurring out.
+                                    // Angular uses html element and calls setViewValue(element.value.trim()), setting it to the trimmed mask
+                                    // when it should be empty
+                                    var currentVal = iElement.val();
+                                    var isTemporarilyEmpty = value === '' && currentVal && angular.isDefined(iAttrs.uiMaskPlaceholderChar) && iAttrs.uiMaskPlaceholderChar === 'space'; 
+                                    if(isTemporarilyEmpty) {
+                                        iElement.val('');
+                                    }
                                     triggerChangeEvent(iElement[0]);
+                                    if(isTemporarilyEmpty) {
+                                        iElement.val(currentVal);
+                                    }
                                 }
                                 prevValue = value;
                             }
@@ -593,7 +606,7 @@ angular.module('ui.mask', [])
 
                                     // If value has not changed, don't want to call $setViewValue, may be caused by IE raising input event due to placeholder
                                     if (valUnmasked !== valUnmaskedOld)
-                                    	valAltered = true;
+                                        valAltered = true;
                                 }
 
                                 // Update values