Font with Built-In Syntax Highlighting (2024)

152 pointsposted 5 days ago
by california-og
(blog.glyphdrawing.club)

37 Comments

cyanmagenta

5 days ago

I view stuff like this kind of like code that fits into a bootloader or whatever. It’s really more of the technical challenge than to actually solve a problem. The result is much better if you just run a script on your hand-coded file to add syntax highlighting as DOM elements. Still, love seeing stuff like this.

michaelsshaw

5 days ago

For blogs, I like the site to stay static. This is a neat way to keep it that way. Having your generator do it is better in my opinion though.

vbezhenar

5 days ago

So script inside web page is bad, but script inside font is good? That's interesting definition of bloat. I'd prefer ordinary webpage using locally installed fonts with explicit JavaScript snippet to highlight keywords.

benrutter

5 days ago

Unless I missed it, the OP doesn't quote reducing bloat as a motivation- more just working without javascript.

I took it to be along the lines of an "easier to work with" type motivation, rather than reducing package sizes.

blauditore

5 days ago

Is it really a script though? IIUC it's more like contextual declaration (e.g. of previous char is X, then use style Y), no?

user

5 days ago

[deleted]

mg

5 days ago

This is interesting.

I have yet to see a good web based text editor with syntax highlighting. They all mess with the native search functionality of the browser. Because they can't just use a textarea for the edit area. With this approach, it would be possible.

I wonder how usable a Python version of this would be?

onion2k

5 days ago

I have yet to see a good web based text editor with syntax highlighting.

I slightly expect you to pull a "no true Scotsman" here and suggest it's actually no good because it doesn't really support mobile browsers very well, but Microsoft's Monaco editor that's driven from VS Code is quite good. https://microsoft.github.io/monaco-editor/

mg

5 days ago

It seems to have the same problems all of the web based editors I have seen have. Either they capture ctrl+f and take away the native search experience. Or they have a broken search experience. This one is in the latter category.

When I hit ctrl+f on that page and type "export":

First it says "1 of 4 matches" but nothing is highlighted.

When I hit enter, it says "2 of 4 matches" and again, nothing is highlighted.

When I hit enter again, it says "3 of 4 matches" and the first match is highlighted.

When I hit enter again, it says "4 of 4 matches" and the second match is highlighted.

gethly

5 days ago

FYI, IDEs and editors too don't use "textarea". Contenteditable essentially makes the web browser work like editor does.

mg

5 days ago

Contenteditable plus the CSS Custom Highlight API (which highlights ranges instead of elements) might indeed allow for a good solution. But I have not yet seen an editor that does that.

mock-possum

5 days ago

> Works in <textarea> and <input>! Syntax highlighting inside <textarea> has been previously impossible, because textareas and inputs can only contain plain text. This is where the interesting

Interesting indeed! This bit feels like a neat bit of hackery to keep in my back pocket for sure.

spockz

5 days ago

Has anyone tried this with PowerPoint yet? Our org is very PowerPoint centric and always struggle a bit with the workflow for code.

Copy pasting from IntelliJ does give colours but none of the other niceties such as kerning or litigation. Screenshots are nice visually but a pain to maintain.

Sayrus

5 days ago

From the article cons section:

> It only works where OpenType is supported. Fortunately, that's all major browsers and most modern programs. However, something like PowerPoint doesn't support OpenType.

spockz

5 days ago

Thank you, I missed that third sentence.

layer8

5 days ago

*ligatures

Is kerning a thing for monospace fonts?

spockz

5 days ago

Yes, ligatures. No idea where “litigations” came from.

I think there is still some kerning going on where the individual letters are placed closer together and the entire word has the same width so more spacing in between words.

exasperaited

5 days ago

This is a curious sort of hazy modern mirror image of the world of Sinclair computers, that embedded their BASIC parsing in the keyboard driver — that is to say, it essentially wasn't possible to type a syntactically incorrect BASIC program.

zX41ZdbW

5 days ago

> it breaks when your code goes to a newline. there's no way to keep context line to line...

This is a blocker for my applications.

TheRealPomax

5 days ago

> The colors in the HTML snippet above comes from within the font itself, the code is plain text, and requires no JavaScript.

But then why does the color disappear if I disallow scripts on this page? Instead of your font, now it uses Consolas.

Are you using JS to load the font in? (if so... web fonts don't need JS to load =)

california-og

5 days ago

Most likely because your JS blocker also blocks custom fonts. It works fine without JS.

TheRealPomax

5 days ago

It does not: with JS blocked, the stylesheet for the webfont never gets injected. Even though it shouldn't need injecting in the first place.

california-og

5 days ago

I'm 100% sure it does. Check again.

TheRealPomax

5 days ago

Then you need to curl the URL, pipe it to an .html file, and then search the resulting file for "@font-face". The only place that has the @font-face rule for this fancy font is inside <template> syntax, meaning it will do nothing (template content is inert) until JS clones that template into the DOM as active content.

california-og

5 days ago

That's for the code-editor webcomponent, the rest of the site doesn't use JS.

TheRealPomax

5 days ago

Correct. The code editor that has the subscript: "The colors in the HTML snippet above comes from within the font itself, the code is plain text, and requires no JavaScript."

Which doesn't work without JS. So adding the @font-face to the page itself, so that things works even without JS, would be lovely.

california-og

5 days ago

I think you're seriously confused or purposefully trolling. That's not the web component I'm talking about, that's just plain html.

cluckindan

5 days ago

Using a variable font with r, g, b axes for each alt would maybe make it possible to change the colors?

eviks

5 days ago

> I want to keep things as simple as possible.

The whole post proves the opposite is true!

Gracana

5 days ago

Perhaps you could add this technology to Z80 sans, to get syntax highlighted Z80 disassembly.

https://github.com/nevesnunes/z80-sans

koct9i

5 days ago

And add Z80 emulator as well. Just in case.

ErroneousBosh

5 days ago

Well someone else mentioned llama.ttf which is a font that embeds an llm, using Harfbuzz's WASM engine.

So, you could absolutely write a WASM Z80 emulator and embed it in a font. Whether or not you could make it do anything useful, or how strong your grip on reality would remain after? I don't know.

But it wasn't like you were doing anything else on the days between Christmas and New Year, right?