Working prototype of Eclipse split editor

The first working prototype of a working split editor is here. You can download it and play with it in Eclipse 3.4.

Basic functions like text cursor, current line highlight (these did not work in the first prototype), undo/redo, cut/copy/paste, status bar items (insert mode, line and column numbers) work fine and stay in sync when switching between the top and bottom half of the split editor.

There are also some known issues:

  • Ctrl+Left/Right/Home/End keyboard shortcuts always operate on the top part of the split editor, even if the cursor is (blinking) in the bottom half.
  • Navigating back and forth using the Alt-Left/Right keys browser-style does not remember the correct editor along with the location and doe not move between the top/bottom half of the editor. I actually have no plans of fixing this. This problem also occurs when opening multiple editor tabs.

Here are some images that demonstrate how to open and use the split editor.

First select the Open With dialog…
Split Editor 1

Then select the [Split Text Editor] option…

Split the Editor by clicking and dragging on the narrow line that runs all the way across above the first line.

And there you go… long live the split editor!

You can try different commands out and see if they work when you move between the two sides (top and bottom) of the editor…

That’s it for now. Enjoy!

Bonus The plugin now includes source code so you can see the kind of monster that lurks in the background to make editor splitting work.

Up Next Next up is a java code splitter, after I resolve the remaining known issues with basic editing functionality. I will also put up an update site for faster/easier delivery of future updates.


First split editor prototypes available

In the true spirit of “release early, release often” I am making my first prototype of a split editor available now as an Eclipse plugin. The plugin works in the new Eclipse 3.4 Ganymede. Download, place in your Eclipse dropins directory and you’re set to go.

Instructions on how to test the plugin are available on the wiki.

Keep in mind that this is a very early prototype and it barely works. There are a lot of issues. If you do download it, please feel free to share your experience with me by posting your (encouraging/bashful/hateful/frustrated/…) comment to this blog or the wiki.

There will be lots more in the coming weeks, so stay tuned!


Hello world!

Welcome! I am working on implementing a split editor for Eclipse as part of Google Summer of Code 2008.

I will track my progress on the project in this blog and on the Eclipse Wiki page dedicated to my project.

Stay tuned!