[sil_euro_latin] Update to keyboard

[LornaSIL]

• Update language tags
• Update documentation for punctuation

Finished fix for #3221
Fixes #2957

[mcdurdin]

Sorry to be a downer on this but I think we need some very careful analysis on nextlayer changes. I agree more nextlayer nuance would be good to have but currently this change is a step backwards (less nuanced!)

[mcdurdin]

I would prefer that this be implemented in the .kmn rather than in the touch layout -- in the begin postkeystroke code path. The logic is there for digits already:

    c Okay, let's stay on the numeric layer if we are there already
    platform('touch') if(&newLayer = "") if(&layer = 'numeric') any(digit) > context

So we just need to create a new store digits-and-punct that includes the other outputs that should not switch layers, and use that there, I think.

Also, I don't think all the punctuation keys should be keeping us on the numeric layer, e.g. '"' should definitely go back to default. We need to consider each punctuation character carefully; the following are my starting thoughts:

0-9 -- stay numeric
. and , -- these should go back to the default layer unless preceded by a digit.
@ -- IMO go back to default layer, used most commonly probably in email addresses
# -- Debatable, the online elite use hashtags 😆
<, > -- Debatable again... can be used for maths but also many other things. perhaps if preceded by digits plus optional whitespace?
«, » -- these are quotation marks, so go back to default
+, -, *, /, ^, %, =, ≠ -- all of these have multiple uses (particularly - and /!). I don't think treating them as maths symbols only makes sense. If preceded by digits and optional whitespace?
( and friends -- these are much more commonly used in text than for numbers, I think. Should not stay in numeric layer
", !, `, ~, ¡, ?, ¿, ;, :, … and & -- these are not numeric related. Go back to default layer.

So, in essence, I don't really agree with @ermshiperete's original suggestion, and I missed the issue when it was opened. We can add more nuance to the layer switch by sticking in the numeric layer when in the middle of a digit sequence and mathematical operators are used, but apart from that I think we need to drop back to default layer.

The rules would be something like (needs careful crafting):

    store(math-operator) ',.=+-*/' c ... and others
    store(spacing-math-operator) '=+-*/' c ... and others, but not ./,
    platform('touch') if(&newLayer = "") if(&layer = 'numeric') any(digit) any(math-operator) > context
    platform('touch') if(&newLayer = "") if(&layer = 'numeric') any(digit) ' ' any(spacing-math-operator) > context

[ermshiperete]

I'm fine with fine-tuning the rules when we do a layer switch. However, I think : should stay in numeric layer if preceded by a digit since that's used for time.

[mcdurdin]

OK, I will pull my comment into #3013, and let's try and spec it in detail.

[mcdurdin]

this seems wrong

[LornaSIL]

I'm reverting the changes to the mobile layout so this PR will not address #2957 as I do not feel confident in how to do it. It only address langtags and documentation.

[LornaSIL]

@mcdurdin I won't be making the changes to the numeric layer in this PR so if you can check it just for the tagging and also documentation of '' (I just updated the prefix image which only displayed a single quote) I'd appreciate it.

[mcdurdin]

I removed fixes #2957 from the original comment, hope that is okay. The documentation update looks fine.

[mcdurdin]

@LornaSIL wrote:

I'm reverting the changes to the mobile layout so this PR will not address #2957 as I do not feel confident in how to do it.

Then I wrote:

I removed fixes #2957 from the original comment, hope that is okay. The documentation update looks fine.

Ugh. We both meant #3013. I'll fix this up. #2957 is fixed by this, #3013 isn't.