1 files changed, 0 insertions, 130 deletions
diff --git a/app/javascript/flavours/glitch/components/intersection_observer_article.js b/app/javascript/flavours/glitch/components/intersection_observer_article.js
deleted file mode 100644
index b28e44e4c..000000000
--- a/app/javascript/flavours/glitch/components/intersection_observer_article.js
+++ /dev/null
@@ -1,130 +0,0 @@
-import React from 'react';
-import PropTypes from 'prop-types';
-import scheduleIdleTask from '../features/ui/util/schedule_idle_task';
-import getRectFromEntry from '../features/ui/util/get_rect_from_entry';
-
-// Diff these props in the "unrendered" state
-const updateOnPropsForUnrendered = ['id', 'index', 'listLength', 'cachedHeight'];
-
-export default class IntersectionObserverArticle extends React.Component {
-
-  static propTypes = {
-    intersectionObserverWrapper: PropTypes.object.isRequired,
-    id: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
-    index: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
-    listLength: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
-    saveHeightKey: PropTypes.string,
-    cachedHeight: PropTypes.number,
-    onHeightChange: PropTypes.func,
-    children: PropTypes.node,
-  };
-
-  state = {
-    isHidden: false, // set to true in requestIdleCallback to trigger un-render
-  }
-
-  shouldComponentUpdate (nextProps, nextState) {
-    const isUnrendered = !this.state.isIntersecting && (this.state.isHidden || this.props.cachedHeight);
-    const willBeUnrendered = !nextState.isIntersecting && (nextState.isHidden || nextProps.cachedHeight);
-    if (!!isUnrendered !== !!willBeUnrendered) {
-      // If we're going from rendered to unrendered (or vice versa) then update
-      return true;
-    }
-    // If we are and remain hidden, diff based on props
-    if (isUnrendered) {
-      return !updateOnPropsForUnrendered.every(prop => nextProps[prop] === this.props[prop]);
-    }
-    // Else, assume the children have changed
-    return true;
-  }
-
-
-  componentDidMount () {
-    const { intersectionObserverWrapper, id } = this.props;
-
-    intersectionObserverWrapper.observe(
-      id,
-      this.node,
-      this.handleIntersection,
-    );
-
-    this.componentMounted = true;
-  }
-
-  componentWillUnmount () {
-    const { intersectionObserverWrapper, id } = this.props;
-    intersectionObserverWrapper.unobserve(id, this.node);
-
-    this.componentMounted = false;
-  }
-
-  handleIntersection = (entry) => {
-    this.entry = entry;
-
-    scheduleIdleTask(this.calculateHeight);
-    this.setState(this.updateStateAfterIntersection);
-  }
-
-  updateStateAfterIntersection = (prevState) => {
-    if (prevState.isIntersecting !== false && !this.entry.isIntersecting) {
-      scheduleIdleTask(this.hideIfNotIntersecting);
-    }
-    return {
-      isIntersecting: this.entry.isIntersecting,
-      isHidden: false,
-    };
-  }
-
-  calculateHeight = () => {
-    const { onHeightChange, saveHeightKey, id } = this.props;
-    // save the height of the fully-rendered element (this is expensive
-    // on Chrome, where we need to fall back to getBoundingClientRect)
-    this.height = getRectFromEntry(this.entry).height;
-
-    if (onHeightChange && saveHeightKey) {
-      onHeightChange(saveHeightKey, id, this.height);
-    }
-  }
-
-  hideIfNotIntersecting = () => {
-    if (!this.componentMounted) {
-      return;
-    }
-
-    // When the browser gets a chance, test if we're still not intersecting,
-    // and if so, set our isHidden to true to trigger an unrender. The point of
-    // this is to save DOM nodes and avoid using up too much memory.
-    // See: https://github.com/mastodon/mastodon/issues/2900
-    this.setState((prevState) => ({ isHidden: !prevState.isIntersecting }));
-  }
-
-  handleRef = (node) => {
-    this.node = node;
-  }
-
-  render () {
-    const { children, id, index, listLength, cachedHeight } = this.props;
-    const { isIntersecting, isHidden } = this.state;
-
-    const style = {};
-
-    if (!isIntersecting && (isHidden || cachedHeight)) {
-      style.height = `${this.height || cachedHeight || 150}px`;
-      style.opacity = 0;
-      style.overflow = 'hidden';
-    }
-
-    return (
-      <article
-        ref={this.handleRef}
-        aria-posinset={index + 1}
-        aria-setsize={listLength}
-        data-id={id}
-        tabIndex='0'
-        style={style}>
-          {children && React.cloneElement(children, { hidden: !isIntersecting && (isHidden || !!cachedHeight) })}
-      </article>
-    );
-  }
-
-}