Summary

Adds LineEnding enum to represent 4 possible cases:

• CR classic Mac
• CRLF Windows
• LF Linux
• (null) platform default

Adds the lineEnding attribute to StyledTextModel via two methods:

• setLineEnding
• getLineEnding

In the CodeArea control, the line endings are expressed via the new lineEnding property.

Problem

The line endings are important in the following operations:

• copy plain text to clipboard
• save plain text (or get plain text)
• IME

Solution

The solution is to provide an attribute to the base model class (StyledTextArea), as well as a property to the control which uses essentially a plain text model (CodeArea).

Specification

See the attached diff file.