Added placeholder and setPlaceholder methods to CPTextField, to facil…

…itate displaying placeholder text for textfields before user has entered text. May want to consider changing text color while displaying placeholder text.

AppKit/CPTextField.j

@@ -66,6 +66,7 @@ var _CPTextFieldSquareBezelColor    = nil;
     BOOL                    _isSelectable;
 
     id                      _value;
+    id                      _placeholderString;
 
     CPLineBreakMode         _lineBreakMode;
 #if PLATFORM(DOM)
@@ -104,7 +105,8 @@ var _CPTextFieldSquareBezelColor    = nil;
     if (self)
     {
         _value = @"";
-
+	_placeholderValue = @"";
+
 #if PLATFORM(DOM)
         _DOMTextElement = document.createElement("div");
         _DOMTextElement.style.position = "absolute";
@@ -245,6 +247,12 @@ var _CPTextFieldSquareBezelColor    = nil;
 
     [[CPDOMWindowBridge sharedDOMWindowBridge] _propagateCurrentDOMEvent:YES];
 
+    // If current value is the placeholder value, remove it to
+    // allow user to update.
+    if ([_value caseInsensitiveCompare:[self placeholderString]]==0) {
+      [self setStringValue:@""];
+    }
+
     return YES;
 }
 
@@ -254,6 +262,11 @@ var _CPTextFieldSquareBezelColor    = nil;
 
     _DOMElement.removeChild(element);
     [self setStringValue:element.value];
+
+    // If textfield has no value, then display the placeholderValue
+    if ([_value caseInsensitiveCompare:@""]==0) {
+        [self setStringValue:[self placeholderString]];
+    }
 
     return YES;
 }
@@ -354,6 +367,24 @@ var _CPTextFieldSquareBezelColor    = nil;
 #endif
 }
 
+- (CPString)placeholderString
+{
+    return [_placeholderString string];
+}
+
+-(void)setPlaceholderString:(CPString)aStringValue
+{
+    _placeholderString = aStringValue;
+#if PLATFORM(DOM)
+    var cssString = _value ? [_value cssString] : @"";
+
+    if (CPFeatureIsCompatible(CPJavascriptInnerTextFeature))
+        _DOMTextElement.innerText = cssString;
+    else if (CPFeatureIsCompatible(CPJavascriptTextContentFeature))
+        _DOMTextElement.textContent = cssString;
+#endif
+}
+
 - (void)sizeToFit
 {
 #if PLATFORM(DOM)