PERF: improve touch, swipe, panning performance on mobile menus
---
* stop event propagation on swipe events: other touch events were stealing a huge amount of time here. Stop event
propagation when handling pan events.
* animate with [web animations api](https://developer.mozilla.org/en-US/docs/Web/API/Web_Animations_API/Using_the_Web_Animations_API)
* prefer translate3d to hint for gpu rendering.
* query document for elements only on start move event, not on subsequent move
events
* remove unused calculations for directioned velocity and distance: all swipe/pan elements function in x/y direction only.
* re-implement scroll locking behavior.
re-implemented scroll lock behavior
---
With stop event propagation, we need to re-implement scroll locking on menu swipes.
Previously, this was using onTouchMove which was costly.
We may now use styling with overflow-y:hidden to lock scroll behavior.
overflow:hidden on html/body elements is now supported by iOS as of 2022
https://bugs.webkit.org/show_bug.cgi?id=153852https://bugs.webkit.org/show_bug.cgi?id=220908
UX: improve swipe
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Some improvements to get gestures and swipes feeling a little more polished.
This focuses on end gesture, and how we transfer it to a css animation to
complete a menu open/close action.
Multitouch: events may pan, scroll, and zoom - especially on iOS safari.
Cancelling the swipe event allows for a more pleasant zooming experience.
* ease-out on menus opening, linear on close
* calculate animation duration for opening and closing,
attempt to better transfer user swipe velocity to css animation.
* more timely close/open and cleanup from calculated animation timing.
* add animation to closing menus on cloak tap
* correctly animate menus with ease-in and ease-out
* add swipe cancel event on multitouch event
DEV
---
* lean on promises
js animations api gives us promises to listen to. Update test waiters
to use waitForPromise from @ember/test-waiters instead of reigster/unregister.
* convert swipe mixin to its own class.
Convert swipe callbacks to custom events on the element.
Move shared functions for max animation time and close logic to
new shared class.
swipe-events lib uses custom events to trigger callbacks, rather than assuming
implemented hard coded function from the mixin's base class. Custom events are
triggered from the bound element as swipestart, swipeend, swipe
Add shared convenience functions for swipe events so they can be more easily
shared.
A client receives an initial swipe event and can check some state to see if it
wants to handle the swipe event and if it doesn't, calling
`event.preventDefault();` will prevent `swipe` and `swipeend` events from firing
until another distinct swipestart event is fired. Swipe events will auto-cancel on multitouch.
The scroll lock has also exposed as its own utility class.
In an effort to modernize our codebase to the latest Ember version we have selected the Topic Timeline as a candidate to be refactored. The topic timeline component was originally built with `Widgets` and this PR will upgrade it to `Glimmer Components`.
The refactored timeline is hidden by default behind a group flag, `SiteSetting.enable_experimental_topic_timeline_groups`. Being part of a group included in this site setting will make the new timeline available for testing.
## Other points of interest
This PR introduces a `Draggable Modifier` available to all components, which will take the place of the existing _drag functionality_ exclusive to widgets.
It can be included like so:
```
{{draggable didStartDrag=@didStartDrag didEndDrag=@didEndDrag dragMove=@dragMove }}
```
* DEV: replace swipe events to use translate rather than left/right
translate is better for animations. also use native css animations for opening
and closing.
* a11y: respect prefers reduced motion on mobile timeline
* DEV: reduce jquery usage
* DEV: add tests for menu swipe events
test is run in 50% zoom/transform which means offsets and x of touch events need to be halved
Refactor test window to use a transform rather than non-standard zoom property
Co-authored-by: Penar Musaraj <pmusaraj@gmail.com>
This removes fixed positioning from d-header and the topic timeline.
Plugins, themes and components that use the above/below header plugin outlet will likely need some margin/padding adjustments.
A first step to adding automatic dark mode color scheme switching. Adds a new SCSS file at `color_definitions.scss` that serves to output all SCSS color variables as CSS custom properties. And replaces all SCSS color variables with the new CSS custom properties throughout the stylesheets.
This is an alpha feature at this point, can only be enabled via console using the `default_dark_mode_color_scheme_id` site setting.
* Add missing icons to set
* Revert FA5 revert
This reverts commit 42572ff
* use new SVG syntax in locales
* Noscript page changes (remove login button, center "powered by" footer text)
* Cast wider net for SVG icons in settings
- include any _icon setting for SVG registry (offers better support for plugin settings)
- let themes store multiple pipe-delimited icons in a setting
- also replaces broken onebox image icon with SVG reference in cooked post processor
* interpolate icons in locales
* Fix composer whisper icon alignment
* Add support for stacked icons
* SECURITY: enforce hostname to match discourse hostname
This ensures that the hostname rails uses for various helpers always matches
the Discourse hostname
* load SVG sprite with pre-initializers
* FIX: enable caching on SVG sprites
* PERF: use JSONP for SVG sprites so they are served from CDN
This avoids needing to deal with CORS for loading of the SVG
Note, added the svg- prefix to the filename so we can quickly tell in
dev tools what the file is
* Add missing SVG sprite JSONP script to CSP
* Upgrade to FA 5.5.0
* Add support for all FA4.7 icons
- adds complete frontend and backend for renamed FA4.7 icons
- improves performance of SvgSprite.bundle and SvgSprite.all_icons
* Fix group avatar flair preview
- adds an endpoint at /svg-sprites/search/:keyword
- adds frontend ajax call that pulls icon in avatar flair preview even when it is not in subset
* Remove FA 4.7 font files
* First take on subsetting svg icons
* FontAwesome 5 svg subset WIP
* Include icons from plugins/badges into svg sprite subset
* add svg icon support to themes
* Add spec for SvgSprite
* Misc. SVG icon fixes
* Use FA5 svgs in local-dates plugin
* CSS adjustments, fix SVG icons in group flair
* Use SVG icons in poll plugin
* Add SVG icons to /wizard
Run `prettier --write "app/assets/stylesheets/**/*.scss" "plugins/**/*.scss"` after making sure you installed it with `yarn`
It's recommended to configure your editor to run prettier on file save.
