This PR makes some updates to the prior keyboard accessibility commit (eb98746):
- Makes `tabindex` attribute only appear on emoji markup in the emoji picker.
- After pressing the Esc key, focus returns to the <textarea/> input (composer editor or chat input)
* DEV: Make emoji elements focusable
Since emoji elements are of type `<img>` it requires a `tablindex="0"` in order to be focusable.
* WIP: Handle emoji focus/selection via arrow keys
Near completion, however, need a few fixes/improvements and overall code cleanup
* WIP: Testing
* DEV: Fixes and cleanup
* DEV: Follow conventions
* DEV: Improve up/down traversal when recents present
* DEV: Emoji markup in tests should include `tabindex`
* DEV: Add `tabindex` to topic tests
* DEV: Variable name as `searchInput` instead of `searchBar`
* DEV: Use appropriate method name (`_setNumEmojiPerRow`)
* DEV: Add comments and avoid nested if
* WIP: Adding test
* Fix first test
* DEV: Add assertions for arrow keys and escape key
* Some fixes for up/down navigation
This does not fix everything, when going from one section to another,
there are issues
* Fix a small regression
* FIX: Ability to focus on search results
Fixes regression
* Refactor calculating next up/down emoji
* Debugging test failure
* Skip stubborn CI test, add others
Co-authored-by: Penar Musaraj <pmusaraj@gmail.com>
Note that this commit is also fixing various mistakes in emojis.
Some of them have been fixed manually in db.json/data.js/groups.json and will need to be fixed in emoji-db gem.
eslint --fix is capable of fix it automatically for you, ensure prettier is run after eslint as eslint --fix could leave the code in an invalid prettier state.
The emoji-picker is a specific piece of code as it has very strong performance requirements which are almost not found anywhere else in the app, as a result it was using various hacks to make it work decently even on old browsers.
Following our drop of Internet Explorer, and various new features in Ember and recent browsers we can now take advantage of this to reduce the amount of code needed, this rewrite most importantly does the following:
- use loading="lazy" preventing the full list of emojis to be loaded on opening
- uses InterserctionObserver to find the active section
- limits the use of native event listentes only for hover/click emojis (for performance reason we track click on the whole emoji area and delegate events), everything else is using ember events
- uses popper to position the emoji picker
- no jquery code
