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Pure Python Vim clone

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Re: Pure Python Vim clone

#71

Post by AnkhMorporkian »

jonathan_s wrote: post #52
amelius wrote: post #47

Why not decouple the following things: - Core editor (internal representation, etc.) - Key bindings (so you could easily create an emacs instead of a vi) - Rendering - Scripting language (for customized behavior) Finally, make sure you thoroughly document these building blocks, so others can create really cool stuff with it. Also, think of possible use-cases when defining the modules. A smart architecture could allow…

Hi, thanks for the suggestions! Actually, the internal representation, is completely separate from the layout. It's not in another repository, but it's decoupled. The key bindings are also separate. Getting emacs bindings is not much more than changing this line [0]. Only adding the bindings for the window management and emacs command line is still to be done. (I know that emacs is actually much more than only its ke…

I want to compliment you on your code. It's so rare to see clean python code. I am almost never able to be able to jump into a file in a module and understand exactly what's happening, but you fucking nailed it. Well done!

Re: Pure Python Vim clone

#72

Post by viraptor »

wz1000 wrote: post #17
kgadek wrote: post #13

Q: Why Python? A: The only alternative would be Haskell, but I still have to learn that. Wow, that would be interesting.

Yi[0] is an editor written in Haskell. [0]: https://github.com/yi-editor/yi

It's got an amazing (I'm not sure if that's in a good or bad way) system for reloading config. Config is code. Reconfiguration means recompiling. If you reload the config, you recompile yi and reexec it - file handles and other information is left laying around so you end up in exactly the same state as before. It's slightly scary from the programming side...

Re: Pure Python Vim clone

#73

Post by alepper »

david-given wrote: post #49
teacup50 wrote: post #19

Earlier quoted context omitted.

Types. They Will Save You Tests™ :-)

I had actually gone and looked for Lua static type checkers. Some exist, but none that'll work with Lua 5.2. I had a really hilarious bug today where under some circumstances all the text in the display would be replaced by numbers. Small integers, each placed where the word should be. What had happened is that I'd added a layer of indirection; where previously, after line wrapping, the data structure for a rendered…

You might find (Typed) Racket interesting - it offers the features you mention, and is a delight to work with.

Re: Pure Python Vim clone

#74

Post by rhapsodyv »

afarrell wrote: post #63
rhapsodyv wrote: post #46

Is there any vim clone that actually have full support to vimfiles?

Does https://github.com/neovim/neovim not?

But it isn't a clone.

Every clone I see try to reproduce vim usage, but none really try to run vimfiles. I think running vimfiles is a must have for a clone to get real users.

Re: Pure Python Vim clone

#75

Post by avinassh »

chestervonwinch wrote: post #30
jonathan_s wrote: post #24

Earlier quoted context omitted.

Can you tell me what terminal application you are using? Does it happen as well in a new terminal?

default terminal app on osx 10.6. happens in a new terminal.

Is there any reason you are still using 10.6?

Re: Pure Python Vim clone

#76

Post by coldtea »

randomfool wrote: post #50
teacup50 wrote: post #19

Earlier quoted context omitted.

Types. They Will Save You Tests™ :-)

Here's some research on the topic, limited to just types- http://evanfarrer.blogspot.com/2012/06/unit-testing-isnt-eno... Types are one mechanism for static analysis. Better contracts (nullability, valid ranges, etc) goes much further.

Nullability and ranges can also be encoded as types in the appropriate type system.

Re: Pure Python Vim clone

#77

Post by coldtea »

hyperbovine wrote: post #64
gaze wrote: post #35

Earlier quoted context omitted.

You know, I hear people use this excuse to justify bad behavior a lot. I once heard a bike messenger tell me that brakes gave him a false sense of security so that's why he didn't have a brake on his fixed gear bicycle.

OTOH, I also see a lot of people justifying their point with a single random anecdote. (But I agree wholeheartedly re: fixies and brakes.)

To disprove an absolute statement ("all X are Y") all you need is a single random anecdote.

Re: Pure Python Vim clone

#78

Post by david-given »

Jach wrote: post #62
david-given wrote: post #49

Earlier quoted context omitted.

I had actually gone and looked for Lua static type checkers. Some exist, but none that'll work with Lua 5.2. I had a really hilarious bug today where under some circumstances all the text in the display would be replaced by numbers. Small integers, each placed where the word should be. What had happened is that I'd added a layer of indirection; where previously, after line wrapping, the data structure for a rendered…

For your example bug I think you're wrong that static types would have made the bug impossible. What you need is strong type checking and a lack of auto-conversion. For example, in Java, this compiles: int[] bodies = {1, 2, 3}; for (int body : bodies) { String formatted_body = " " + body + " "; callMethodWithStrArg(formatted_body); } And if in this hypothetical case it was previously a `String[] bodies` and a `String…

That's very true (and I really wish that Lua didn't do implicit type conversion of numbers to strings --- it's a major wart on an otherwise very nice language).

I had totally forgotten that Java does it too, despite having done `""+i` lots of times as a cheap and easy and evil way to convert numbers to strings.

...I am currently rewriting a big chunk of the primary data storage to use immutable data structures, because it makes implementing Undo easier. I am having to fight the urge to redo it all in Haskell.

Re: Pure Python Vim clone

#79

Post by wz1000 »

viraptor wrote: post #72
wz1000 wrote: post #17

Earlier quoted context omitted.

Yi[0] is an editor written in Haskell. [0]: https://github.com/yi-editor/yi

It's got an amazing (I'm not sure if that's in a good or bad way) system for reloading config. Config is code. Reconfiguration means recompiling. If you reload the config, you recompile yi and reexec it - file handles and other information is left laying around so you end up in exactly the same state as before. It's slightly scary from the programming side...

Xmonad does the same thing.
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