Make cursor appear when clicking after the last line of a file (#56)

[RenanGreca]

Description

• In STTextViewController.swift, I created a subclass of NSScrollView to implement a custom mouseDown(with event:) function. The function makes it so, if a click is detected within the ScrollView but out of the contained STTextView, the editor cursor is placed on the last index of the text.

I created the subclass at the end of STTextViewController.swift, but it should probably go to its own file; upon review I would like suggestions of where to place this file, as none of the current directories seem appropriate for it.

Additionally, the name of the class is CEScrollView (CE for CodeEdit); I am not sure if there is a different naming convention customized subclasses.

Related Issue

• 56

Checklist

• [x] I read and understood the contributing guide as well as the code of conduct
• [x] My changes generate no new warnings
• [x] My code builds and runs on my machine
• [x] I documented my code
• [x] Review requested

Screenshots

[thecoolwinter]

Looks awesome, I just left a comment about where to put the file like you asked. And one small change for finding the end range. Thank you! This has been needed for a while. Also yes the CE prefix is perfectly fine.