<commit_before>import React from 'react';
import ImmutablePropTypes from 'react-immutable-proptypes';
import { ScrollContainer } from 'react-router-scroll';
import PropTypes from 'prop-types';
import StatusContainer from '../containers/status_container';
import LoadMore from './load_more';
import ImmutablePureComponent from 'react-immutable-pure-component';
import IntersectionObserverWrapper from '../features/ui/util/intersection_observer_wrapper';
import { debounce } from 'lodash';

export default class StatusList extends ImmutablePureComponent {

  static propTypes = {
    scrollKey: PropTypes.string.isRequired,
    statusIds: ImmutablePropTypes.list.isRequired,
    onScrollToBottom: PropTypes.func,
    onScrollToTop: PropTypes.func,
    onScroll: PropTypes.func,
    trackScroll: PropTypes.bool,
    shouldUpdateScroll: PropTypes.func,
    isLoading: PropTypes.bool,
    hasMore: PropTypes.bool,
    prepend: PropTypes.node,
    emptyMessage: PropTypes.node,
  };

  static defaultProps = {
    trackScroll: true,
  };

  intersectionObserverWrapper = new IntersectionObserverWrapper();

  handleScroll = debounce((e) => {
    const { scrollTop, scrollHeight, clientHeight } = e.target;
    const offset = scrollHeight - scrollTop - clientHeight;
    this._oldScrollPosition = scrollHeight - scrollTop;

    if (250 > offset && this.props.onScrollToBottom && !this.props.isLoading) {
      this.props.onScrollToBottom();
    } else if (scrollTop < 100 && this.props.onScrollToTop) {
      this.props.onScrollToTop();
    } else if (this.props.onScroll) {
      this.props.onScroll();
    }
  }, 200, {
    trailing: true,
  });

  componentDidMount () {
    this.attachScrollListener();
    this.attachIntersectionObserver();
  }

  componentDidUpdate (prevProps) {
    // Reset the scroll position when a new toot comes in in order not to
    // jerk the scrollbar around if you're already scrolled down the page.
    if (prevProps.statusIds.size < this.props.statusIds.size &&
        prevProps.statusIds.first() !== this.props.statusIds.first() &&
        this._oldScrollPosition &&<commit_msg>Update scroll top state on column mounting (#4276)<commit_after>import React from 'react';
import ImmutablePropTypes from 'react-immutable-proptypes';
import { ScrollContainer } from 'react-router-scroll';
import PropTypes from 'prop-types';
import StatusContainer from '../containers/status_container';
import LoadMore from './load_more';
import ImmutablePureComponent from 'react-immutable-pure-component';
import IntersectionObserverWrapper from '../features/ui/util/intersection_observer_wrapper';
import { debounce } from 'lodash';

export default class StatusList extends ImmutablePureComponent {

  static propTypes = {
    scrollKey: PropTypes.string.isRequired,
    statusIds: ImmutablePropTypes.list.isRequired,
    onScrollToBottom: PropTypes.func,
    onScrollToTop: PropTypes.func,
    onScroll: PropTypes.func,
    trackScroll: PropTypes.bool,
    shouldUpdateScroll: PropTypes.func,
    isLoading: PropTypes.bool,
    hasMore: PropTypes.bool,
    prepend: PropTypes.node,
    emptyMessage: PropTypes.node,
  };

  static defaultProps = {
    trackScroll: true,
  };

  intersectionObserverWrapper = new IntersectionObserverWrapper();

  handleScroll = debounce(() => {
    const { scrollTop, scrollHeight, clientHeight } = this.node;
    const offset = scrollHeight - scrollTop - clientHeight;
    this._oldScrollPosition = scrollHeight - scrollTop;

    if (250 > offset && this.props.onScrollToBottom && !this.props.isLoading) {
      this.props.onScrollToBottom();
    } else if (scrollTop < 100 && this.props.onScrollToTop) {
      this.props.onScrollToTop();
    } else if (this.props.onScroll) {
      this.props.onScroll();
    }
  }, 200, {
    trailing: true,
  });

  componentDidMount () {
    this.attachScrollListener();
    this.attachIntersectionObserver();

    // Handle initial scroll posiiton
    this.handleScroll();
  }

  componentDidUpdate (prevProps) {
    // Reset the scroll position when a new toot comes in in order not to
    // jerk the scrollbar around if you're already scrolled down the page.
    if (prevProps.statusIds.size < this.props.statusIds.size &&
        prevProps.statusIds.first() !== this.props.statusIds.first() &&
        this._oldScrollPosition &&
{'fraction_non_alphanumeric': 0.10668826660495256, 'fraction_numerical': 0.0050914140245313586, 'mean_word_length': 3.945080091533181, 'pattern_counts': {'":': 0, '<': 7, '<?xml version=': 0, '>': 7, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '5388899', 'n_tokens_mistral': 1239, 'n_tokens_neox': 1223, 'n_words': 298}