Font ligatures don't work v3

[orangecoloured]

• I am on the latest Hyper.app version
• I have searched the issues of this repo and believe that this is not a duplicate

• OS version and name: 10.14.4 macOS Mojave
• Hyper.app version: 3.0.0
• Link of a Gist with the contents of your .hyper.js:
• Relevant information from devtools (CMD+ALT+I on macOS, CTRL+SHIFT+I elsewhere):
• The issue is reproducible in vanilla Hyper.app: Is Vanilla or with the hyper-font-ligatures add-on.

Issue

I'm using Fira Code font and the ligatures don't work. I found this issue #914 and tried installing the hyper-font-ligatures add-on or adding this css

termCSS: `
  x-screen x-row {
    font-variant-ligatures: initial;
  }
`,

but none of these seem to work.

[mhall]

At least on Windows 10, setting webGLRenderer: false in your config file will bring them back (assuming you still have the hyper-font-ligatures plugin installed). This will also fix some of the other rendering anomalies of v3, although sadly not all.

[orangecoloured]

Oh. Yes, working now.
So, ligatures in exchange for performance :)

[nurtext]

@orangecoloured So why did you close this bug?

[orangecoloured]

@nurtext Because technically this bug was resolved. The ligatures work without WebGL renderer.
I think another issue should be created addressing this.

[nurtext]

@orangecoloured I understand, but for me it's still open because turning off the newly introduced renderer isn't a valid fix. Ever tried tailing or cating some logs with the old renderer? It made Hyper almost useless for me. Now Hyper is back in the game (at least for me), but ligatures are a must have in 2019 IMHO.

[mhall]

Yeah, I would recommend reopening this as well.

[depadiernos]

So, based on this comment, looks like there's a fix for this in xterm.js. Would be really awesome to get that pulled in so ligatures will work without a performance hit.

[GitSquared]

xTerm 4 supports this through the new Addon system: https://github.com/xtermjs/xterm-addon-ligatures

However, the xterm fork used by Hyper is severely out of date: 56 commits ahead, 1290 commits behind.

Edit: Switching the fork for latest xTerm works... except the WebGL renderer is quite broken - I believe it should be possible to fix it but I haven't researched that much. Also, the fork contains valuable work that needs to be rebased on xterm@4.

[nurtext]

@GitSquared Looks like they're already on it: #3830

[Stanzilla]

@GitSquared our effort in that PR is currently stuck on broken resizing