Project #3: Post-mortem

What went well?

Prognosticator – This is the component that predicts what word Intelliwriter thinks you are typing. This was hands-down the most fun component to put together. I used a simplified Markov Chain algorithm that analyzes existing texts and formulates for any single word, what are the most common following words. A simple idea but impressively good at efficiently suggesting words based on previous words.

Tab-completion – The output from the Prognosticator was a quick reference of words-to-next-word. This made the tab-completion logic super simple and way more effective than I had originally imagined.

Look-and-feel – I didn’t think about this one much until a friend tried out an early version of Intelliwriter and commented of the smooth look-and-feel. I wasn’t really trying to make anything special, but I think that not trying to make something special was accidentally what a distraction-free text editor should be. Simple is as simple does.

What was terrible?

Brew-your-own-text-editor – When starting development of a new component, the first question any developer should ask is “hasn’t someone done this before?” There are a million text editors out there and probably lots that open source their code, and yet here I was re-implementing a text editor and spending at least half my time figuring out the logic of drawing letters in the right places, handling weird characters (…or not), and having to solve the problem of text editing for the millionth time. If I ever decide to go fo’-realz on Intelliwriter, I have got to take this out the equation and find some text editor I can hack apart.

Start Stop Continue

START – I have got to build something that ships. Granted, Who Goes First? technically shipped but I’ve never been thrilled with its resource inefficiency. That thing eats batteries like an old dog. I’ve always told myself that I love software development because you get to constantly learn new things. Though I don’t think anyone should lose their need for learning, I need to take these 10 years as a professional developer and getting down to moonlighting business.

STOP – It may be time to thank the 24-hour project limit for its contributions and revamped my initial principles into focusing on delivery rather than time-management. I feel I have learned a lot from imposing the limit and I see improvements in my time management both at home and at work. Now it is time to take this personal advancement and focus on results.

CONTINUE –  I started breaking down projects into independent components with Mars Commander and really took it to heart with Intelliwriter. This is how the modern software world works and I consider it a part of my more principles of development.

Project #3: Complete!

Complete enough, at any rate.

IntelliWriter Logo

IntelliWriter is a distraction-free center-biased text editor with natural language tab-completion. Well, that’s not entirely true. It is a pretty fun experiment in center-biased typing with natural language tab-completion on top of a less-than-wonderful text editor. Let’s just set the expectations at that. I ended up spending more time than I wanted on reinventing the text-editing wheel which didn’t leave as much time as I hoped for some of the other features. But! The outcome is, as with all of these projects so far, I know what I would do differently if I ever want to expand this project into something fo’ realz. The post-mortem should be enlightening for this project. Stay tuned!


I typed a slowly in the demo video/gif above to try and make it obvious where I was using tab-completion. I think with little practice I would be able to spit out a fair number more words-per-minute than I could using a normal text editor. In testing I got really used to keeping my eyes in one place thanks to the center-biasing and now find following the cursor across the screen as I type this into WordPress’s blog editor mildly inconvenient.



  • “Center-biased” means the cursor will always be in the center of the screen with the text moving as you type (like a typewriter, if you remember those).
  • As you type word suggestions will appear. You can press TAB to cycle through the word suggestions, autocompleting what you are typing.
  • CTRL-S to save to a text file and CTRL-O to open a text file for editing.
  • UP, DOWN, LEFT, and RIGHT arrow keys should work for navigating around the document.
  • HOME and END also work as expected as well as CTRL-HOME and CTRL-END.
  • Hold both SHIFT keys to temporarily center the document on the screen.

Known Issues

  • Holding down a key for repeating characters or navigation is not enabled.
  • Probably lots of other things – achtung.

Enjoy! If you can!

Project #3: IntelliWriter Update

A dictionary and 79 epubs walk into a bar…

IntelliWriter Logo

Word Suggestion Engine

This was the major theme of the first half of the work so far. After spending a few hours crawling the interwebs for someone who has done this in an open-source, information should be free, hack-the-planet kind of way, I gave up a decided I needed to do it myself. I took a hint from an old friend, Markov chains.  I needed an engine that when given a word, it would spit out a list of words that would most-likely come next. In this scenario, Markov chains basically say ignore everything but the word that comes before it and that works pretty well.

So! I grabbed a pile of almost 80 fiction books in epub format and wrote an analysis tool that calculates for any given word, what are the most likely words to come after it. Filter all those words with actual words from a fully resolved Open Office dictionary (which was a bit of a project on its own)…and done!

Here’s how we are looking so far:


Look good? I think it looks pretty good. The word recommendations are normally pretty close if not spot-on for this passage. There’s no tab-completion yet, which is really the linchpin to see if this little experiment is actually useful. Better get back to work!

The task list as it stands today, for posterity:



Project #3: IntelliWriter

A typewriter and tab-completion walk into a bar…

IntelliWriter Logo



IntelliWriter is a distraction-free(ish) writer’s tool with a few twists. The first is that, like a typewriter, where you are typing stays in the same place while the document moves as you type. This keeps your eyes from having to travel around as you type. I’m not sure if this is actually a problem, but let’s try it out anyway.

Secondly, IntelliWriter will attempt to dynamically bring up suggestions on the word it thinks you are typing. If you see that the current suggestion is the word you are typing, you can simply press tab and the word will complete automagically. This is similar to word suggestions when typing on a smart phone but with a keyboard shortcut for completion.

Lastly, and this might be a stretch goal for the 24 hour timeline, the document will be continuously saving as well as keeping a history of past saves available. The writer will be able to see the draft from 30 minutes ago as easily as seeing the draft from yesterday without having to manually save off new copies. Again, I’m not sure this is actually a problem but it sounds like it might be cool. Engage!

Previous Work

HanxWriter – Tom Hanks’s typewriter simulator is the original inspiration for the centered-cursor feature.

DarkRoom – A Windows clone of OSX’s WriteRoom, is more-or-less the standard for distraction free text-editing.

Write! – A really pretty tool and the only one I’ve found with a solid auto-complete. It builds the auto-complete options from words you’ve already typed.

iaWriter – Another nice tool with a well thought out flow. Also has a great syntactic highlighting feature (adjectives, nouns, conjunctions, et cetera).

WriteMonkey – Slim, light, portable, auto-save with history, and extensible.

Design and Mock-ups

I’ll start with a white-on-black color scheme with a yellow highlight. There is a grand opportunity to support themes, but that can be a nice-to-have after the big features are up and running. Notice in the mockups that the cursor where you are typing never leaves the center of the screen…

A new document
A new document


Typing the first sentence
Typing the first sentence with suggestions


A tab-completed word!
A tab-completed word!
Editing mid-passage
Editing mid-passage


Work Items

I feel a little better about this list for the 24-hour deadline than I did in the last one. There are a few risky areas but I think I’ll be able to leverage previous work for things like the suggestions dictionary and possibly a historical save engine. …we’ll see!

  1. Feature: Typewriter
    1. Text surface
    2. Text surface configuration (e.g. width, font)
    3. Keyboard event handling
    4. Centered text surface
  2. Feature: Suggestions
    1. Engine
    2. Rendering
    3. Tab-selection and completion
  3. Feature: Auto-save w/ history
    1. Simple auto-save
    2. Version tagging
    3. History engine
    4. History browser
  4. Export to text file

Future Work

  1. Spell-checking
  2. Color themes
  3. Responsive to resolution changes (e.g. on-screen keyboard)
  4. Export to Word and PDF
  5. Document statistics (words, characters, read time, etc…)
  6. Focus mode (dim all but current paragraph)
  7. Cloud storage integration
  8. Markdown support
  9. Xamarin port