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I’m trying to implement configurable key bindings in tt. Boy, is parsing the key names into tcell.EventKeys a horrible thing. This type consists of three information:
maybe a predefined compound key sequence, like Ctrl+A
maybe some modifiers, such as Shift, Ctrl, etc.
maybe a rune if neither modifiers are present nor a predefined compound key exists
It’s hardcoded usage results in code like this:
func (t *TreeView[T]) InputHandler() func(event *tcell.EventKey, setFocus func(p tview.Primitive)) {
return t.WrapInputHandler(func(event *tcell.EventKey, setFocus func(p tview.Primitive)) {
switch event.Key() {
case tcell.KeyUp:
t.moveUp()
case tcell.KeyDown:
t.moveDown()
case tcell.KeyHome:
t.moveTop()
case tcell.KeyEnd:
t.moveBottom()
case tcell.KeyCtrlE:
t.moveScrollOffsetDown()
case tcell.KeyCtrlY:
t.moveScrollOffsetUp()
case tcell.KeyTab, tcell.KeyBacktab:
if t.finished != nil {
t.finished(event.Key())
}
case tcell.KeyRune:
if event.Modifiers() == tcell.ModNone {
switch event.Rune() {
case 'k':
t.moveUp()
case 'j':
t.moveDown()
case 'g':
t.moveTop()
case 'G':
t.moveBottom()
}
}
}
})
}
This data structure is just awful to handle and especially initialize in my opinion. Some compound tcell.Keys are mapped to human-readable names in tcell.KeyNames. However, these names always use - to join modifiers, e.g. resulting in Ctrl-A, whereas tcell.EventKey.Name() produces +-delimited strings, e.g. Ctrl+A. Gnaarf, why this asymmetry!? O_o
This seems to be much nicer to use. However, I fear this will break eventually. And it’s more fragile in general, because it’s rather easy to forget the conversion or one can get confused whether a certain key at hand is now an original tcell.Key coming from the library or an “extended” one.
I will see if I can find some other programs that provide configurable tcell key bindings.
$ python3 -m pep8 file.py
/usr/lib/python3/dist-packages/pep8.py:2123: UserWarning:
pep8 has been renamed to pycodestyle (GitHub issue #466)
Use of the pep8 tool will be removed in a future release.
Please install and use ```pycodestyle` instead.
$ pip install pycodestyle
$ pycodestyle ...
I can’t seem to remember the name pycodestyle for the life of me. Maybe that’s why I almost never use it.
(#pebgp3a) @movq@www.uninformativ.de@prologic@twtxt.net That’s what I like about Go, too. However, every now and then I really dislike the result, e.g. when removing spaces from a column layout. Doesn’t happen often, but when it does, I hate it.
I think I should have a look at Python formatters, too. Pep8 is deprecated, I think, it’s been some time that I looked at it.
It drizzled all morning when we picked up the old christmas trees in town with the scouts. Right after lunch the snow storm suddenly hit and dumped three centimeters of snow in just 15 minutes. I cycled home in these crazy conditions, freezing rain hammered my face. As soon as I arrived, it stopped. It’s now down to drizzling again.
All my soaked gear is now hung up to dry. The next 11 months, I’m going to find needles over needles in all kind of impossible places.
(#g34eztq) @movq@www.uninformativ.de Oh, I see. Unfortunately, there seems to be no box drawing character for a corner with a diagonal line. Indeed, this is probably the best you can do.
Is the single character enough to hit it comfortably with the mouse, though? Maybe one additional to the left and above could be something to think about. Not sure. Of course this complicates it a bit more. Personally, I like fullscreen windows, so I’m definitely the wrong guy to judge this or even comment on. :-)
Just in case you haven’t already noticed it, the right lower corner of the window in front was not updated when it received the focus. 8-) (In tt I also render focused text input fields with a doubly lined border, where unfocused ones have a single one.)
(#izdrxgq) @bender@twtxt.net They’re not completely impossible, but C makes it much easier to run into them. I think the key point is that in those “safe” languages, buffer overflows are caught and immediately crash the program (if not handled otherwise) instead of silently corrupting memory, not being noticed right away and maybe only later crashing at a different location, where it can be very hard to find the actual root cause. This is a big improvement in my book.
Some programmers are indeed horrible. I’m guilty myself. :-)
(#xtkev6q) @movq@www.uninformativ.de Yiha! Even autoscroll, very nice! The naming certainly drew inspiration from Urwid. I like it. Looking forward to eventually checking out its inner workings. :-)
(#fadfcsa) @bender@twtxt.net I also went back to my duty today and fixed a problem I created right before vanishing into the holidays. Of course, I discovered more problems while fixing the one thing. Luckily, another public holiday tomorrow. :-)
@movq@www.uninformativ.de I noticed that your feed’s last modification timestamp was missing in my database. I cannot tell for certain, but I think it did work before. Turns out, your httpd now sends the Last-Modified with UTC instead of GMT. Current example:
Sat, 03 Jan 2026 06:50:20 UTC
I’m not a fan of this timestamp format at all, but according to the HTTP specification, HTTP-date must always use GMT for a timezone, nothing else: https://httpwg.org/specs/rfc9110.html#http.date