JEdit

JEdit is a code editor written in Java. An older,
smaller version of it is used in LateralGM on the main branch of
development, while a secondary branch is working to replace it with
JoshEdit.

Comparison to JoshEdit

Both

• Functional text and code editors
• Written in Java
• Small, modular and extensible
• Syntax Highlighting
• Based on JComponent, rather than JTextComponent, so a lot of text
  functionality needs to be replicated
• Action-based interaction, meaning that you can have buttons and
  keystrokes invoke certain actions (like copy/paste, etc).
• Undoable

JEdit

• Complete, but using an older version (since the newer version is
  huge and a fully featured text editor, rather than just a text area)
• No official development. May grab some features from newer versions.
  All development must be done by the LateralGM team during
  implementation.
• Very stable.
• Back-end based on Document, a java class, albeit complicated, with
  index-based character positioning. Caret and Selection seem to be
  integer-based rather than class-based.
• Separate front-end painting class keeps the main class under 2000
  lines (including comments).
• Flexible font support.
• A complete Completions menu to suggest completions to the text you
  are typing.
• Missing several of the features that JoshEdit has, however it is
  possible to add them.
• Very well documented and modularized.

JoshEdit

• New project, most key functionality present.
• Undergoing semi-active official development.
• Not too stable yet. A few big bugs still need to be worked out.
  • Drag and Drop broken.
  • Drag-scrolling buggy.
  • Viewport tends to lose the caret.
  • A list of stuff here: JoshEdit:Todo
• Back-end based on a list of a custom Line class, which delegates to
  StringBuilder. Positioning is point-based (row,column). Likewise,
  custom Caret and custom Selection classes are defined.
• Front-end painting and a hodgepodge of everything else related to it
  is thrown into the main JoshText class, bringing it to over 2000
  lines of code.
• Font support restricted to monospaced fonts.
• Completions menu functionality replicated from the JEdit one.
  Functionality mostly there, with work still under way to complete
  the rest.
• A number of features that JEdit does not natively have
  • Line numbers.
  • Rectangle selection.
  • Multi-line typing.
  • Settings panel and Find dialog (although currently broken)
• Poorly documented and modularization tends to be done by refactoring
  the code.