validate Interface Item

validateInterfaceItem.m

- (BOOL)validateInterfaceItem:(id)item
{
    if(_tableView.selectedRow == -1)
        return NO;
    
    NSPasteboardType type = [clipData.types objectAtIndex:_tableView.selectedRow];
    if([item action] == @selector(cmdShowItemFinder:)
       || [item action] == @selector(cmdQuickView:))
    {
        if(fileListView.isHidden || fileListView.selectedRow == -1)
            return NO;
        
        return isFilenamesType(type);
    }
    else if([item action] == @selector(cmdSaveAsFile:))
    {
        //return (isTextType(type) || isRtfType(type) || isRtfdType(type) || isImageType(type));
        return (isTextType(type) || isRtfType(type) || isImageType(type));
    }
    else if([item action] == @selector(cmdEditImage:))
    {
        return isImageType(type);
    }
    return YES;
}

- (BOOL)validateMenuItem:(NSMenuItem *)item
{
    return [self validateInterfaceItem:item];
}

- (BOOL)validateToolbarItem:(NSToolbarItem *)item
{
    return [self validateInterfaceItem:item];
}