While more pleasant from an FSM standpoint, comparing the current targetPost to the previous one does not work if goToNumber is called twice in a row for the same post. For instance, if a user clicks the mentions link to a post twice, the post stream breaks.
Because the Slidable class was always added on creation, it was lost every time the class list changed (in this case when the discussion was hidden/unhidden which added/removed DiscussionListItem--hidden class). So by determining the Slidable class's presence in elementAttrs() method, it guarantees it always properly set.
When the page is scrolled, goToIndex is called, or the page is loaded,
various listeners result in the scrubber being updated with a new
position and values. However, if goToNumber is called, the scrubber
will not be updated. Accordingly, we add logic to the scrubber's
onupdate to update itself, but only when needed, as indicated by this
This saves us a LOT of unnecessary calls, and makes scrubber movement smoother.
* Update frontend to Mithril 2
- Update Mithril version to v2.0.4
- Add Typescript typings for Mithril
- Rename "props" to "attrs"; "initProps" to "initAttrs"; "m.prop" to "m.stream"; "m.withAttr" to "utils/withAttr".
- Use Mithril 2's new lifecycle hooks
- SubtreeRetainer has been rewritten to be more useful for the new system
- Utils for forcing page re-initializations have been added (force attr in links, setRouteWithForcedRefresh util)
- Other mechanical changes, following the upgrade guide
- Remove some of the custom stuff in our Component base class
- Introduce "fragments" for non-components that control their own DOM
- Remove Mithril patches, introduce a few new ones (route attrs in <a>;
- Redesign AlertManagerState `show` with 3 overloads: `show(children)`, `show(attrs, children)`, `show(componentClass, attrs, children)`
- The `affixedSidebar` util has been replaced with an `AffixedSidebar` component
Challenges:
- `children` and `tag` are now reserved, and can not be used as attr names
- Behavior of links to current page changed in Mithril. If moving to a page that is handled by the same component, the page component WILL NOT be re-initialized by default. Additional code to keep track of the current url is needed (See IndexPage, DiscussionPage, and UserPage for examples)
- Native Promise rejections are shown on console when not handled
- Instances of components can no longer be stored. The state pattern should be used instead.
Refs #1821.
Co-authored-by: Alexander Skvortsov <sasha.skvortsov109@gmail.com>
Co-authored-by: Matthew Kilgore <tankerkiller125@gmail.com>
Co-authored-by: Franz Liedke <franz@develophp.org>
* Fix closing the composer with ESC key
Regression from #2161.
* Remove obsolete method
Regression from #2162.
* Mark method as protected
* Fade in posts in post stream using CSS
This also avoids a double-fade from the JavaScript code, which was
probably introduced in #2160.
* Fix fadeIn for post stream items
Co-authored-by: Alexander Skvortsov <sasha.skvortsov109@gmail.com>
Like previous "state PRs", this moves app-wide logic relating to
our "composer" widget to its own "state" class, which can be
referenced and called from all parts of the app. This lets us
avoid storing component instances, which we cannot do any longer
once we update to Mithril v2.
This was not as trivial as some of the other state changes, as we
tried to separate DOM effects (e.g. animations) from actual state
changes (e.g. minimizing or opening the composer).
New features:
- A new `app.screen()` method returns the current responsive screen
mode. This lets us check what breakpoint we're on in JS land
without hardcoding / duplicating the actual breakpoints from CSS.
- A new `SuperTextarea` util exposes useful methods for directly
interacting with and manipulating the text contents of e.g. our
post editor.
- A new `ConfirmDocumentUnload` wrapper component encapsulates the
logic for asking the user for confirmation when trying to close
the browser window or navigating to another page. This is used in
the composer to prevent accidentally losing unsaved post content.
There is still potential for future cleanups, but we finally want
to unblock the Mithril update, so these will have to wait:
- Composer height change logic is very DOM-based, so should maybe
not sit in the state.
- I would love to experiment with using composition rather than
inheritance for the `ComposerBody` subclasses.
- Encapsulate app.current, app.previous in PageState objects
- Reorganize Page classes to use one central base class in common
Co-authored-by: Franz Liedke <franz@develophp.org>
* Don't store checkbox states in NotificaitonGrid, use props for loading in Checkbox and Switch, replace preferenceSaver with internal management of loading state
