feat(ui): expose a method for checking whether a message contains only emojis and should be boosted (use a bigger font size)

[stefanceriu]

• supports only text room message types
• enumerates through their body's grapheme clusters and check that every single one of them is an emoji
• part of the LazyTimelineItemProvider so that it can be opt in

[codecov]

Codecov Report

Attention: Patch coverage is 56.25000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 85.40%. Comparing base (4c4dd03) to head (ae29e45).

Files with missing lines	Patch %	Lines
...rates/matrix-sdk-ui/src/timeline/event_item/mod.rs	56.25%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4577      +/-   ##
==========================================
- Coverage   85.42%   85.40%   -0.02%     
==========================================
  Files         286      286              
  Lines       32213    32229      +16     
==========================================
+ Hits        27517    27525       +8     
- Misses       4696     4704       +8     

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[Hywan]

Neat!

[Hywan]

Please add a documentation with an example :-).

[stefanceriu]

Documentation sorted but I'm not so sure about the example, creating a timeline item seems too involved.

[Hywan]

Pro tips: You can create declare a function that takes a TimelineItem as a parameter, however the function is “hidden” from the doc:

/// # fn test(timeline_item: TimelineItem) {
/// timeline_item.do_something();
/// # }

rustdoc will be able to run the test by checking the types (not the execution though, because test() won't run), and rustdoc will also be able to render the doc, as:

timeline_item.do_something();

[Hywan]

See Documentation tests, Hiding portions of the example to learn more.