Support for copy/paste/cut and selectedRange/setSelectedRange in CPTextField.

Improvements to the Pasteboard integration code from yesterday.

AppKit/CPPasteboard.j

@@ -128,7 +128,10 @@ var CPPasteboards = nil,
         _changeCount = 0;
 
         if (supportsNativePasteboard)
+        {
             _nativePasteboard = window.cpPasteboardWithName(aName);
+            [self _synchronizePasteboard];
+        }
     }
     
     return self;
@@ -177,6 +180,12 @@ var CPPasteboards = nil,
     @return the pasteboard's change count
 */
 - (unsigned)declareTypes:(CPArray)types owner:(id)anOwner
+{
+    [self _declareTypes:types owner:anOwner updateNativePasteboard:YES];
+}
+
+/*! @ignore */
+- (unsigned)_declareTypes:(CPArray)types owner:(id)anOwner updateNativePasteboard:(BOOL)shouldUpdate
 {
     [_types setArray:types];
 
@@ -188,15 +197,15 @@ var CPPasteboards = nil,
     while (count--)
         [_owners setObject:anOwner forKey:_types[count]];
 
-    if (_nativePasteboard)
+    if (_nativePasteboard && shouldUpdate)
     {
         var nativeTypes = [types copy];
         if ([types containsObject:CPStringPboardType])
             nativeTypes.push(UTF8PboardType);
 
         _nativePasteboard.declareTypes_(nativeTypes);
+        _changeCount = _nativePasteboard.changeCount();
     }
-
     return ++_changeCount;
 }
 
@@ -255,6 +264,7 @@ var CPPasteboards = nil,
 */
 - (CPArray)types
 {
+    [self _synchronizePasteboard];
     return _types;
 }
 
@@ -283,16 +293,46 @@ var CPPasteboards = nil,
     
     if (owner)
     {
-        [owner pasteboard:self provideDataForType:aType];
-        
-        ++_changeCount;
-        
+        [owner pasteboard:self provideDataForType:aType];        
         return [_provided objectForKey:aType];
     }
     
+    if (aType === CPStringPboardType)
+        return [self dataForType:UTF8PboardType];
+
     return nil;
 }
 
+- (void)_synchronizePasteboard
+{
+    if (_nativePasteboard && _nativePasteboard.changeCount() > _changeCount)
+    {
+        var nativeTypes = [_nativePasteboard.types() copy];
+        if ([nativeTypes containsObject:UTF8PboardType])
+            nativeTypes.push(CPStringPboardType);
+
+        [self _declareTypes:nativeTypes owner:self updateNativePasteboard:NO];
+
+        _changeCount = _nativePasteboard.changeCount();
+    }
+}
+
+/*! @ignore
+    method provided for integration with native pasteboard
+*/
+- (void)pasteboard:(CPPasteboard)aPasteboard provideDataForType:(CPString)aType
+{
+    if (aType === CPStringPboardType)
+    {
+        var string = _nativePasteboard.stringForType_(UTF8PboardType);
+
+        [self setString:string forType:CPStringPboardType];
+        [self setString:string forType:UTF8PboardType];
+    }
+    else
+        [self setString:_nativePasteboard.stringForType_(aType) forType:aType];
+}
+
 /*!
     Returns the property list for the specified data type
     @param aType the requested data type

AppKit/CPTextField.j

@@ -789,11 +789,129 @@ CPTextFieldStatePlaceholder = CPThemeState("placeholder");
 #endif
 }
 
+- (void)copy:(id)sender
+{
+    var selectedRange = [self selectedRange];
+
+    if (selectedRange.length < 1)
+        return;
+
+    var pasteboard = [CPPasteboard generalPasteboard],
+        stringValue = [self stringValue],
+        stringForPasting = [stringValue substringWithRange:selectedRange];
+
+    [pasteboard declareTypes:[CPStringPboardType] owner:nil];
+    [pasteboard setString:stringForPasting forType:CPStringPboardType];    
+}
+
+- (void)cut:(id)sender
+{
+    [self copy:sender];
+    [self deleteBackwards:sender];
+}
+
+- (void)paste:(id)sender
+{
+    var pasteboard = [CPPasteboard generalPasteboard];
+    
+    if (![[pasteboard types] containsObject:CPStringPboardType])
+        return;
+
+    [self deleteBackwards:sender];
+
+    var selectedRange = [self selectedRange],
+        stringValue = [self stringValue],
+        pasteString = [pasteboard stringForType:CPStringPboardType],
+        newValue = [stringValue stringByReplacingCharactersInRange:selectedRange withString:pasteString];
+
+    [self setStringValue:newValue];
+    [self setSelectedRange:CPMakeRange(selectedRange.location+pasteString.length, 0)];
+}
+
+- (CPRange)selectedRange
+{
+    if ([[self window] firstResponder] !== self)
+        return CPMakeRange(0, 0);
+
+    // we wrap this in try catch because firefox will throw an exception in certain instances
+    try 
+    {
+        var inputElement = [self _inputElement],
+            selectionStart = inputElement.selectionStart,
+            selectionEnd = inputElement.selectionEnd;
+
+        if ([selectionStart isKindOfClass:CPNumber])
+            return CPMakeRange(selectionStart, selectionEnd - selectionStart);    
+
+        // browsers which don't support selectionStart/selectionEnd (aka IE).
+        var theDocument = inputElement.ownerDocument || inputElement.document,
+            selectionRange = theDocument.selection.createRange(),
+            range = inputElement.createTextRange();
+
+        if (range.inRange(selectionRange))
+        {
+            range.setEndPoint('EndToStart', selectionRange);
+            return CPMakeRange(range.text.length, selectionRange.text.length);
+        }
+    } 
+    catch (e) 
+    {
+        // fall through to the return
+    }
+
+    return CGMakeRange(0, 0);
+}
+
+- (void)setSelectedRange:(CPRange)aRange
+{
+    if (![[self window] firstResponder] === self)
+        return;
+
+    var inputElement = [self _inputElement];
+
+    try 
+    {
+        if ([inputElement.selectionStart isKindOfClass:CPNumber])
+        {
+            inputElement.selectionStart = aRange.location;
+            inputElement.selectionEnd = CPMaxRange(aRange);
+        }
+        else
+        {
+            // browsers which don't support selectionStart/selectionEnd (aka IE).
+            var theDocument = inputElement.ownerDocument || inputElement.document,
+                existingRange = theDocument.selection.createRange(),
+                range = inputElement.createTextRange();
+    
+            if (range.inRange(existingRange))
+            {
+                range.collapse(true);
+                range.move('character', aRange.location);
+                range.moveEnd('character', aRange.length);
+                range.select();
+            }
+        }
+    }
+    catch (e)
+    {
+    }
+}
+
 - (void)selectAll:(id)sender
 {
     [self selectText:sender];
 }
 
+- (void)deleteBackwards:(id)sender
+{
+    var selectedRange = [self selectedRange],
+        stringValue = [self stringValue],
+        newValue = [stringValue stringByReplacingCharactersInRange:selectedRange withString:""];
+
+    [self setStringValue:newValue];
+    [self setSelectedRange:CPMakeRange(selectedRange.location, 0)];
+}
+
 #pragma mark Setting the Delegate
 
 - (void)setDelegate:(id)aDelegate