mirror of
https://github.com/flarum/core.git
synced 2025-07-11 11:56:23 +02:00
* 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>
55 lines
1.6 KiB
JavaScript
55 lines
1.6 KiB
JavaScript
/*global s9e*/
|
|
|
|
import Component from '../../common/Component';
|
|
|
|
/**
|
|
* The `ComposerPostPreview` component renders Markdown as HTML using the
|
|
* TextFormatter library, polling a data source for changes every 50ms. This is
|
|
* done to prevent expensive redraws on e.g. every single keystroke, while
|
|
* still retaining the perception of live updates for the user.
|
|
*
|
|
* ### Attrs
|
|
*
|
|
* - `composer` The state of the composer controlling this preview.
|
|
* - `className` A CSS class for the element surrounding the preview.
|
|
* - `surround` A callback that can execute code before and after re-render, e.g. for scroll anchoring.
|
|
*/
|
|
export default class ComposerPostPreview extends Component {
|
|
static initAttrs(attrs) {
|
|
attrs.className = attrs.className || '';
|
|
attrs.surround = attrs.surround || ((preview) => preview());
|
|
}
|
|
|
|
view() {
|
|
return <div className={this.attrs.className} />;
|
|
}
|
|
|
|
oncreate(vnode) {
|
|
super.oncreate(vnode);
|
|
|
|
// Every 50ms, if the composer content has changed, then update the post's
|
|
// body with a preview.
|
|
let preview;
|
|
const updatePreview = () => {
|
|
// Since we're polling, the composer may have been closed in the meantime,
|
|
// so we bail in that case.
|
|
if (!this.attrs.composer.isVisible()) return;
|
|
|
|
const content = this.attrs.composer.fields.content();
|
|
|
|
if (preview === content) return;
|
|
|
|
preview = content;
|
|
|
|
this.attrs.surround(() => s9e.TextFormatter.preview(preview || '', vnode.dom));
|
|
};
|
|
updatePreview();
|
|
|
|
this.updateInterval = setInterval(updatePreview, 50);
|
|
}
|
|
|
|
onremove() {
|
|
clearInterval(this.updateInterval);
|
|
}
|
|
}
|