chinwagsocial/app/javascript/mastodon/components/status_content.js

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import React from 'react';
import ImmutablePropTypes from 'react-immutable-proptypes';
import PropTypes from 'prop-types';
import { isRtl } from '../rtl';
import { FormattedMessage } from 'react-intl';
import Permalink from './permalink';
import classnames from 'classnames';
import PollContainer from 'mastodon/containers/poll_container';
import Icon from 'mastodon/components/icon';
import { autoPlayGif } from 'mastodon/initial_state';
import { decode as decodeIDNA } from 'mastodon/utils/idna';
const MAX_HEIGHT = 642; // 20px * 32 (+ 2px padding at the top)
// Regex matching what "looks like a link", that is, something that starts with
// an optional "http://" or "https://" scheme and then what could look like a
// domain main, that is, at least two sequences of characters not including spaces
// and separated by "." or an homoglyph. The idea is not to match valid URLs or
// domain names, but what could be confused for a valid URL or domain name,
// especially to the untrained eye.
const h_confusables = 'h\u13c2\u1d58d\u1d4f1\u1d691\u0068\uff48\u1d525\u210e\u1d489\u1d629\u0570\u1d4bd\u1d65d\u1d421\u1d5c1\u1d5f5\u04bb\u1d559';
const t_confusables = 't\u1d42d\u1d5cd\u1d531\u1d565\u1d4c9\u1d669\u1d4fd\u1d69d\u0074\u1d461\u1d601\u1d495\u1d635\u1d599';
const p_confusables = 'p\u0440\u03c1\u1d52d\u1d631\u1d665\u1d429\uff50\u1d6e0\u1d45d\u1d561\u1d595\u1d71a\u1d699\u1d78e\u2ca3\u1d754\u1d6d2\u1d491\u1d7c8\u1d746\u1d4c5\u1d70c\u1d5c9\u0070\u1d780\u03f1\u1d5fd\u2374\u1d7ba\u1d4f9';
const s_confusables = 's\u1d530\u118c1\u1d494\u1d634\u1d4c8\u1d668\uabaa\u1d42c\u1d5cc\u1d460\u1d600\ua731\u0073\uff53\u1d564\u0455\u1d598\u1d4fc\u1d69c\u10448\u01bd';
const column_confusables = ':\u0903\u0a83\u0703\u1803\u05c3\u0704\u0589\u1809\ua789\u16ec\ufe30\u02d0\u2236\u02f8\u003a\uff1a\u205a\ua4fd';
const slash_confusables = '/\u2041\u2f03\u2044\u2cc6\u27cb\u30ce\u002f\u2571\u31d3\u3033\u1735\u2215\u29f8\u1d23a\u4e3f';
const dot_confusables = '.\u002e\u0660\u06f0\u0701\u0702\u2024\ua4f8\ua60e\u10a50\u1d16d';
const linkRegex = new RegExp(`^\\s*(([${h_confusables}][${t_confusables}][${t_confusables}][${p_confusables}][${s_confusables}]?[${column_confusables}][${slash_confusables}][${slash_confusables}]))?[^:/\\n ]+([${dot_confusables}][^:/\\n ]+)+`);
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 (linkText === targetURL.origin || linkText === targetURL.host || 'www.' + linkText === targetURL.host || linkText.startsWith(targetURL.origin + '/') || linkText.startsWith(targetURL.host + '/')) {
return false;
}
// The link hasn't been recognized, maybe it features an international domain name
const hostname = decodeIDNA(targetURL.hostname);
const host = targetURL.host.replace(targetURL.hostname, hostname);
const origin = targetURL.origin.replace(targetURL.host, host);
if (linkText === origin || linkText === host || linkText.startsWith(origin + '/') || linkText.startsWith(host + '/')) {
return false;
}
// If the link text looks like an URL or auto-generated link, it is misleading
return linkRegex.test(linkText);
};
export default class StatusContent extends React.PureComponent {
static contextTypes = {
router: PropTypes.object,
};
static propTypes = {
status: ImmutablePropTypes.map.isRequired,
expanded: PropTypes.bool,
onExpandedToggle: PropTypes.func,
onClick: PropTypes.func,
collapsable: PropTypes.bool,
};
state = {
hidden: true,
collapsed: null, // `collapsed: null` indicates that an element doesn't need collapsing, while `true` or `false` indicates that it does (and is/isn't).
};
_updateStatusLinks () {
const node = this.node;
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'));
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} else if (link.textContent[0] === '#' || (link.previousSibling && link.previousSibling.textContent && link.previousSibling.textContent[link.previousSibling.textContent.length - 1] === '#')) {
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link.addEventListener('click', this.onHashtagClick.bind(this, link.text), false);
} else {
link.setAttribute('title', link.href);
link.classList.add('unhandled-link');
if (isLinkMisleading(link)) {
while (link.firstChild) {
link.removeChild(link.firstChild);
}
const prefix = (link.href.match(/https?:\/\/(www\.)?/) || [''])[0];
const text = link.href.substr(prefix.length, 30);
const suffix = link.href.substr(prefix.length + 30);
const cutoff = !!suffix;
const prefixTag = document.createElement('span');
prefixTag.classList.add('invisible');
prefixTag.textContent = prefix;
link.appendChild(prefixTag);
const textTag = document.createElement('span');
if (cutoff) {
textTag.classList.add('ellipsis');
}
textTag.textContent = text;
link.appendChild(textTag);
const suffixTag = document.createElement('span');
suffixTag.classList.add('invisible');
suffixTag.textContent = suffix;
link.appendChild(suffixTag);
}
}
link.setAttribute('target', '_blank');
link.setAttribute('rel', 'noopener');
}
if (
this.props.collapsable
&& this.props.onClick
&& this.state.collapsed === null
&& node.clientHeight > MAX_HEIGHT
&& this.props.status.get('spoiler_text').length === 0
) {
this.setState({ collapsed: true });
}
}
_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();
}
onMentionClick = (mention, e) => {
if (this.context.router && e.button === 0 && !(e.ctrlKey || e.metaKey)) {
e.preventDefault();
this.context.router.history.push(`/accounts/${mention.get('id')}`);
}
}
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onHashtagClick = (hashtag, e) => {
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hashtag = hashtag.replace(/^#/, '').toLowerCase();
if (this.context.router && e.button === 0 && !(e.ctrlKey || e.metaKey)) {
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e.preventDefault();
this.context.router.history.push(`/timelines/tag/${hashtag}`);
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}
}
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) => {
if (!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 (element.localName === 'button' || element.localName === 'a' || element.localName === 'label') {
return;
}
element = element.parentNode;
}
if (deltaX + deltaY < 5 && e.button === 0 && this.props.onClick) {
this.props.onClick();
}
this.startXY = null;
}
handleSpoilerClick = (e) => {
e.preventDefault();
if (this.props.onExpandedToggle) {
// The parent manages the state
this.props.onExpandedToggle();
} else {
this.setState({ hidden: !this.state.hidden });
}
}
handleCollapsedClick = (e) => {
e.preventDefault();
this.setState({ collapsed: !this.state.collapsed });
}
setRef = (c) => {
this.node = c;
}
render () {
const { status } = this.props;
if (status.get('content').length === 0) {
return null;
}
const hidden = this.props.onExpandedToggle ? !this.props.expanded : this.state.hidden;
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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': this.props.onClick && this.context.router,
'status__content--with-spoiler': status.get('spoiler_text').length > 0,
'status__content--collapsed': this.state.collapsed === true,
});
if (isRtl(status.get('search_index'))) {
directionStyle.direction = 'rtl';
}
const readMoreButton = (
<button className='status__content__read-more-button' onClick={this.props.onClick} key='read-more'>
<FormattedMessage id='status.read_more' defaultMessage='Read more' /><Icon id='angle-right' fixedWidth />
</button>
);
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' /> : <FormattedMessage id='status.show_less' defaultMessage='Show less' />;
if (hidden) {
mentionsPlaceholder = <div>{mentionLinks}</div>;
}
return (
<div className={classNames} ref={this.setRef} tabIndex='0' style={directionStyle} onMouseDown={this.handleMouseDown} onMouseUp={this.handleMouseUp}>
<p style={{ marginBottom: hidden && status.get('mentions').isEmpty() ? '0px' : null }}>
<span dangerouslySetInnerHTML={spoilerContent} lang={status.get('language')} />
{' '}
<button tabIndex='0' className={`status__content__spoiler-link ${hidden ? 'status__content__spoiler-link--show-more' : 'status__content__spoiler-link--show-less'}`} onClick={this.handleSpoilerClick}>{toggleText}</button>
</p>
{mentionsPlaceholder}
<div tabIndex={!hidden ? 0 : null} className={`status__content__text ${!hidden ? 'status__content__text--visible' : ''}`} style={directionStyle} dangerouslySetInnerHTML={content} lang={status.get('language')} />
{!hidden && !!status.get('poll') && <PollContainer pollId={status.get('poll')} />}
</div>
);
} else if (this.props.onClick) {
return (
<div className={classNames} ref={this.setRef} tabIndex='0' style={directionStyle} onMouseDown={this.handleMouseDown} onMouseUp={this.handleMouseUp}>
<div className='status__content__text status__content__text--visible' style={directionStyle} dangerouslySetInnerHTML={content} lang={status.get('language')} />
{!!this.state.collapsed && readMoreButton}
{!!status.get('poll') && <PollContainer pollId={status.get('poll')} />}
</div>
);
} else {
return (
<div className={classNames} ref={this.setRef} tabIndex='0' style={directionStyle}>
<div className='status__content__text status__content__text--visible' style={directionStyle} dangerouslySetInnerHTML={content} lang={status.get('language')} />
{!!status.get('poll') && <PollContainer pollId={status.get('poll')} />}
</div>
);
}
}
}