Right now the Scala editor extends the Java editor and overrides part of it.
After adding more and more Scala features, the result is a bit messy.
Some of the features are still provided by JDT, some by Scala IDE. Some action not relevant for Scala are still shown. The preferences are split between the Java and Scala ...

The goal is to create a Scala Editor based on the Eclipse text editor. It basically would allow more control on what the editor can do.

The list of features for the editor include:

• Smart Indentation
• Scala Settings
• Better completion w/ javadoc
• ScalaDoc
• Hyperlinking
• Override indicators
• Placeholders for parameters in methods’ call

#1000219 is the same request, but the details are a bit out-of-date.