gistfile1.j

/**
 * What follows is an awful, awful solution for catching native paste events
 * on CPTextField and properly firing the textDidChange event.
 *
 * It doesn't yet handle cut.
 *
 * I only did it this way because I was in a big rush for a demo, and didn't
 * want to fork Cappuccino at the time.
 */
@import <Foundation/Foundation.j>

function Swizzle(cls, originalSelector, newSelector)
{
    var originalMethod = class_getInstanceMethod(cls, originalSelector);
    var newMethod = class_getInstanceMethod(cls, newSelector);
    method_exchangeImplementations(originalMethod, newMethod);
}

@implementation CPTextField (Additions)

- (void)PItextDidFocus:(CPNotification)note
{
    [self _inputElement].onpaste = function(e, elName)
    {
        var originalString = [self stringValue];
        
        [self deleteBackward:self];

        var selectedRange = [self selectedRange],
            stringValue = [self stringValue],
            pasteString = e.clipboardData.getData("Text"),
            newValue = [stringValue stringByReplacingCharactersInRange:selectedRange withString:pasteString];

        [self setStringValue:newValue];
        [self setSelectedRange:CPMakeRange(selectedRange.location+pasteString.length, 0)];
        
        var modifiedString = [self stringValue];
        
        if (originalString !== modifiedString)
        {
            [self textDidChange:[CPNotification notificationWithName:CPControlTextDidChangeNotification object:self userInfo:nil]];
        }
        
        // If we don't do this, we get hit twice for some reason.
        e.preventDefault();
    };
    
    // Call original impl
    [self PItextDidFocus:note];
}

- (void)PItextDidBlur:(CPNotification)note
{
    [self _inputElement].onpaste = null;
    
    // Call original impl
    [self PItextDidBlur:note];
}

@end

function PatchCPTextField()
{
    Swizzle([CPTextField class], @selector(textDidFocus:), @selector(PItextDidFocus:));
}