Implement the support for the inline code blocks

[cubuspl42]

Description

Implement the support for the inline code blocks, as proposed here: react-native-community/discussions-and-proposals#695

[github-actions]

⚠️

Newer Version of React Native is Available!

ℹ️

You are on a supported minor version, but it looks like there's a newer patch available - 0.73.2. Please upgrade to the highest patch for your minor or latest and verify if the issue persists (alternatively, create a new project and repro the issue in it). If it does not repro, please let us know so we can close out this issue. This helps us ensure we are looking at issues that still exist in the most recent releases.

[github-actions]

⚠️	Missing Reproducible Example
ℹ️	We could not detect a reproducible example in your issue report. Please provide either: If your bug is UI related: a Snack If your bug is build/update related: use our Reproducer Template. A reproducer needs to be in a GitHub repository under your username.

[cubuspl42]

@cortinico I think we could...

...add labels "Type: Enhancement", "Tech: Fabric", "Tech: React Native Core"
...remove all other labels

I hope that we won't get into a fight with bots thinking that this is a bug!

[cubuspl42]

The first big step in this project was de-duplicating various paths for building Spannable objects on Android:

• De-duplicate building Spannable on Android #39630 (merged 🚀)

This PR is now merged!

Remaining actions:

• Launch an A/B test to verify this functionality
• Analyze the results from the A/B test (March/June/July)
• Delete the code left-overs from the A/B test

[cubuspl42]

The second wave of minor changes is now live:

• Extract fragment conversions to separate functions #42597 (merged 🚀)
• Clean up the function naming in TextMeasureCache.h #42598 (merged 🚀)
• De-duplicate the logic for counting attachments #42596 (merged 🚀)
• RCTAttributedTextUtils.mm: Split NSAttributedString creation #42595 (merged 🚀)
• Move all ReactSpan subclasses to a separate folder #42594 (merged 🚀)
• TextLayoutUtils: Use named arguments #42593 (merged 🚀)
• CustomLineHeightSpan: Increase the readability #42592 (merged 🚀)

[cubuspl42]

Wave 3:

• CustomStyleSpan: Move the class comment #42700 (merged 🚀)
• Refactor TextFragmentList into AttributedString #42701 (in review)
• Do not serialize text attributes that are not used later #42703 (approved ✅)
• Extract the typeface-finding logic to findEffectiveTypeface #42704 (in review)

[cubuspl42]

PR with the initial feature implementation:

• Initial implementations of spans #43150

[krishpranav]

Hi, is this still open? I am looking to work on some issues.

[cubuspl42]

@krishpranav

#39630 was reverted because of some performance regressions on production for Meta apps (these were measured by Meta using their internal tools).

I'm no longer working on this project. Long story short, the Android text subsystem in React Native is not in very good shape and some of the folks who originally implemented it no longer work for Meta. Doing significant changes in that subsystem from outside of Meta is unrealistic; believe me, I tried to move mountains.

For now, I'll close this.

[krishpranav]

okay cool np.