Develop NSTextField subclass specialized for IP Address input/display.

Successful completion of this project requires the freelancer to produce an NSTextField subclass with the following behavior: 1. Designed specifically for entering & displaying an IPv4 Address (e.g. [login to view URL]). 2. An IPv4 address is displayed as 4 numbers where each number is valued between 1 and 254 and are separated by periods. The user should not be allowed to enter an invalid IP address. 3. If the value of the NSTextField subclass is nil or has zero length, then the textfield should display a placeholder that helps the user understand that they should enter an IP address. The desired placeholder is "___.___.___.___" where each of the 4 series of 3 underscore characters represents one of the four numbers described in #2 above. 4. The textfield should assist the user in entering the IP Address by following these rules: 4.1 When entering each of the 4 numbers, if the user enters a number between 100 and 254, then the cursor should automatically jump to the next number. 4.2 When entering each of the 4 numbers, if the user enters a number between 1 and 99, then the user should be able to type the period (.) or the space bar to have the cursor jump to the next number. 4.3 When the cursor jumps to the next number in the sequence, the NSTextField should highlight that number's 3 underscores from the placeholder so that the underscores are replaced by the user's input.