1 files changed, 376 insertions, 0 deletions
diff --git a/app/javascript/flavours/glitch/components/status_content.js b/app/javascript/flavours/glitch/components/status_content.js
new file mode 100644
index 000000000..2c79de4db
--- /dev/null
+++ b/app/javascript/flavours/glitch/components/status_content.js
@@ -0,0 +1,376 @@
+import React from 'react';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import PropTypes from 'prop-types';
+import { isRtl } from 'flavours/glitch/util/rtl';
+import { FormattedMessage } from 'react-intl';
+import Permalink from './permalink';
+import classnames from 'classnames';
+import Icon from 'flavours/glitch/components/icon';
+import { autoPlayGif } from 'flavours/glitch/util/initial_state';
+import { decode as decodeIDNA } from 'flavours/glitch/util/idna';
+
+const textMatchesTarget = (text, origin, host) => {
+  return (text === origin || text === host
+          || text.startsWith(origin + '/') || text.startsWith(host + '/')
+          || 'www.' + text === host || ('www.' + text).startsWith(host + '/'));
+}
+
+const isLinkMisleading = (link) => {
+  let linkTextParts = [];
+
+  // Reconstruct visible text, as we do not have much control over how links
+  // from remote software look, and we can't rely on `innerText` because the
+  // `invisible` class does not set `display` to `none`.
+
+  const walk = (node) => {
+    switch (node.nodeType) {
+    case Node.TEXT_NODE:
+      linkTextParts.push(node.textContent);
+      break;
+    case Node.ELEMENT_NODE:
+      if (node.classList.contains('invisible')) return;
+      const children = node.childNodes;
+      for (let i = 0; i < children.length; i++) {
+        walk(children[i]);
+      }
+      break;
+    }
+  };
+
+  walk(link);
+
+  const linkText = linkTextParts.join('');
+  const targetURL = new URL(link.href);
+
+  // The following may not work with international domain names
+  if (textMatchesTarget(linkText, targetURL.origin, targetURL.host) || textMatchesTarget(linkText.toLowerCase(), targetURL.origin, targetURL.host)) {
+    return false;
+  }
+
+  // The link hasn't been recognized, maybe it features an international domain name
+  const hostname = decodeIDNA(targetURL.hostname).normalize('NFKC');
+  const host = targetURL.host.replace(targetURL.hostname, hostname);
+  const origin = targetURL.origin.replace(targetURL.host, host);
+  const text = linkText.normalize('NFKC');
+  return !(textMatchesTarget(text, origin, host) || textMatchesTarget(text.toLowerCase(), origin, host));
+};
+
+export default class StatusContent extends React.PureComponent {
+
+  static propTypes = {
+    status: ImmutablePropTypes.map.isRequired,
+    expanded: PropTypes.bool,
+    collapsed: PropTypes.bool,
+    onExpandedToggle: PropTypes.func,
+    media: PropTypes.element,
+    mediaIcon: PropTypes.string,
+    parseClick: PropTypes.func,
+    disabled: PropTypes.bool,
+    onUpdate: PropTypes.func,
+    tagLinks: PropTypes.bool,
+    rewriteMentions: PropTypes.string,
+  };
+
+  static defaultProps = {
+    tagLinks: true,
+    rewriteMentions: 'no',
+  };
+
+  state = {
+    hidden: true,
+  };
+
+  _updateStatusLinks () {
+    const node = this.contentsNode;
+    const { tagLinks, rewriteMentions } = this.props;
+
+    if (!node) {
+      return;
+    }
+
+    const links = node.querySelectorAll('a');
+
+    for (var i = 0; i < links.length; ++i) {
+      let link = links[i];
+      if (link.classList.contains('status-link')) {
+        continue;
+      }
+      link.classList.add('status-link');
+
+      let mention = this.props.status.get('mentions').find(item => link.href === item.get('url'));
+
+      if (mention) {
+        link.addEventListener('click', this.onMentionClick.bind(this, mention), false);
+        link.setAttribute('title', mention.get('acct'));
+        if (rewriteMentions !== 'no') {
+          while (link.firstChild) link.removeChild(link.firstChild);
+          link.appendChild(document.createTextNode('@'));
+          const acctSpan = document.createElement('span');
+          acctSpan.textContent = rewriteMentions === 'acct' ? mention.get('acct') : mention.get('username');
+          link.appendChild(acctSpan);
+        }
+      } else if (link.textContent[0] === '#' || (link.previousSibling && link.previousSibling.textContent && link.previousSibling.textContent[link.previousSibling.textContent.length - 1] === '#')) {
+        link.addEventListener('click', this.onHashtagClick.bind(this, link.text), false);
+      } else {
+        link.addEventListener('click', this.onLinkClick.bind(this), false);
+        link.setAttribute('title', link.href);
+        link.classList.add('unhandled-link');
+
+        try {
+          if (tagLinks && isLinkMisleading(link)) {
+            // Add a tag besides the link to display its origin
+
+            const tag = document.createElement('span');
+            tag.classList.add('link-origin-tag');
+            tag.textContent = `[${new URL(link.href).host}]`;
+            link.insertAdjacentText('beforeend', ' ');
+            link.insertAdjacentElement('beforeend', tag);
+          }
+        } catch (e) {
+          // The URL is invalid, remove the href just to be safe
+          if (tagLinks && e instanceof TypeError) link.removeAttribute('href');
+        }
+      }
+
+      link.setAttribute('target', '_blank');
+      link.setAttribute('rel', 'noopener noreferrer');
+    }
+  }
+
+  _updateStatusEmojis () {
+    const node = this.node;
+
+    if (!node || autoPlayGif) {
+      return;
+    }
+
+    const emojis = node.querySelectorAll('.custom-emoji');
+
+    for (var i = 0; i < emojis.length; i++) {
+      let emoji = emojis[i];
+      if (emoji.classList.contains('status-emoji')) {
+        continue;
+      }
+      emoji.classList.add('status-emoji');
+
+      emoji.addEventListener('mouseenter', this.handleEmojiMouseEnter, false);
+      emoji.addEventListener('mouseleave', this.handleEmojiMouseLeave, false);
+    }
+  }
+
+  componentDidMount () {
+    this._updateStatusLinks();
+    this._updateStatusEmojis();
+  }
+
+  componentDidUpdate () {
+    this._updateStatusLinks();
+    this._updateStatusEmojis();
+    if (this.props.onUpdate) this.props.onUpdate();
+  }
+
+  onLinkClick = (e) => {
+    if (this.props.collapsed) {
+      if (this.props.parseClick) this.props.parseClick(e);
+    }
+  }
+
+  onMentionClick = (mention, e) => {
+    if (this.props.parseClick) {
+      this.props.parseClick(e, `/accounts/${mention.get('id')}`);
+    }
+  }
+
+  onHashtagClick = (hashtag, e) => {
+    hashtag = hashtag.replace(/^#/, '');
+
+    if (this.props.parseClick) {
+      this.props.parseClick(e, `/timelines/tag/${hashtag}`);
+    }
+  }
+
+  handleEmojiMouseEnter = ({ target }) => {
+    target.src = target.getAttribute('data-original');
+  }
+
+  handleEmojiMouseLeave = ({ target }) => {
+    target.src = target.getAttribute('data-static');
+  }
+
+  handleMouseDown = (e) => {
+    this.startXY = [e.clientX, e.clientY];
+  }
+
+  handleMouseUp = (e) => {
+    const { parseClick, disabled } = this.props;
+
+    if (disabled || !this.startXY) {
+      return;
+    }
+
+    const [ startX, startY ] = this.startXY;
+    const [ deltaX, deltaY ] = [Math.abs(e.clientX - startX), Math.abs(e.clientY - startY)];
+
+    let element = e.target;
+    while (element) {
+      if (['button', 'video', 'a', 'label', 'wave'].includes(element.localName)) {
+        return;
+      }
+      element = element.parentNode;
+    }
+
+    if (deltaX + deltaY < 5 && e.button === 0 && parseClick) {
+      parseClick(e);
+    }
+
+    this.startXY = null;
+  }
+
+  handleSpoilerClick = (e) => {
+    e.preventDefault();
+
+    if (this.props.onExpandedToggle) {
+      this.props.onExpandedToggle();
+    } else {
+      this.setState({ hidden: !this.state.hidden });
+    }
+  }
+
+  setRef = (c) => {
+    this.node = c;
+  }
+
+  setContentsRef = (c) => {
+    this.contentsNode = c;
+  }
+
+  render () {
+    const {
+      status,
+      media,
+      mediaIcon,
+      parseClick,
+      disabled,
+      tagLinks,
+      rewriteMentions,
+    } = this.props;
+
+    const hidden = this.props.onExpandedToggle ? !this.props.expanded : this.state.hidden;
+
+    const content = { __html: status.get('contentHtml') };
+    const spoilerContent = { __html: status.get('spoilerHtml') };
+    const directionStyle = { direction: 'ltr' };
+    const classNames = classnames('status__content', {
+      'status__content--with-action': parseClick && !disabled,
+      'status__content--with-spoiler': status.get('spoiler_text').length > 0,
+    });
+
+    if (isRtl(status.get('search_index'))) {
+      directionStyle.direction = 'rtl';
+    }
+
+    if (status.get('spoiler_text').length > 0) {
+      let mentionsPlaceholder = '';
+
+      const mentionLinks = status.get('mentions').map(item => (
+        <Permalink
+          to={`/accounts/${item.get('id')}`}
+          href={item.get('url')}
+          key={item.get('id')}
+          className='mention'
+        >
+          @<span>{item.get('username')}</span>
+        </Permalink>
+      )).reduce((aggregate, item) => [...aggregate, item, ' '], []);
+
+      const toggleText = hidden ? [
+        <FormattedMessage
+          id='status.show_more'
+          defaultMessage='Show more'
+          key='0'
+        />,
+        mediaIcon ? (
+          <Icon
+            fixedWidth
+            className='status__content__spoiler-icon'
+            id={mediaIcon}
+            aria-hidden='true'
+            key='1'
+          />
+        ) : null,
+      ] : [
+        <FormattedMessage
+          id='status.show_less'
+          defaultMessage='Show less'
+          key='0'
+        />,
+      ];
+
+      if (hidden) {
+        mentionsPlaceholder = <div>{mentionLinks}</div>;
+      }
+
+      return (
+        <div className={classNames} tabIndex='0' onMouseDown={this.handleMouseDown} onMouseUp={this.handleMouseUp} ref={this.setRef}>
+          <p
+            style={{ marginBottom: hidden && status.get('mentions').isEmpty() ? '0px' : null }}
+          >
+            <span dangerouslySetInnerHTML={spoilerContent} />
+            {' '}
+            <button tabIndex='0' className='status__content__spoiler-link' onClick={this.handleSpoilerClick}>
+              {toggleText}
+            </button>
+          </p>
+
+          {mentionsPlaceholder}
+
+          <div className={`status__content__spoiler ${!hidden ? 'status__content__spoiler--visible' : ''}`}>
+            <div
+              ref={this.setContentsRef}
+              key={`contents-${tagLinks}`}
+              style={directionStyle}
+              tabIndex={!hidden ? 0 : null}
+              dangerouslySetInnerHTML={content}
+              className='status__content__text'
+            />
+            {media}
+          </div>
+
+        </div>
+      );
+    } else if (parseClick) {
+      return (
+        <div
+          className={classNames}
+          style={directionStyle}
+          onMouseDown={this.handleMouseDown}
+          onMouseUp={this.handleMouseUp}
+          tabIndex='0'
+          ref={this.setRef}
+        >
+          <div
+            ref={this.setContentsRef}
+            key={`contents-${tagLinks}-${rewriteMentions}`}
+            dangerouslySetInnerHTML={content}
+            className='status__content__text'
+            tabIndex='0'
+          />
+          {media}
+        </div>
+      );
+    } else {
+      return (
+        <div
+          className='status__content'
+          style={directionStyle}
+          tabIndex='0'
+          ref={this.setRef}
+        >
+          <div ref={this.setContentsRef} key={`contents-${tagLinks}`} className='status__content__text' dangerouslySetInnerHTML={content} tabIndex='0' />
+          {media}
+        </div>
+      );
+    }
+  }
+
+}