Importing vanillin from upstream ;) ;)

app/javascript/mastodon/components/media_gallery.js

@@ -0,0 +1,230 @@
+import React from 'react';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import PropTypes from 'prop-types';
+import IconButton from './icon_button';
+import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
+import { isIOS } from '../is_mobile';
+
+const messages = defineMessages({
+  toggle_visible: { id: 'media_gallery.toggle_visible', defaultMessage: 'Toggle visibility' },
+});
+
+class Item extends React.PureComponent {
+
+  static contextTypes = {
+    router: PropTypes.object,
+  };
+
+  static propTypes = {
+    attachment: ImmutablePropTypes.map.isRequired,
+    index: PropTypes.number.isRequired,
+    size: PropTypes.number.isRequired,
+    onClick: PropTypes.func.isRequired,
+    autoPlayGif: PropTypes.bool,
+  };
+
+  static defaultProps = {
+    autoPlayGif: false,
+  };
+
+  handleMouseEnter = (e) => {
+    if (this.hoverToPlay()) {
+      e.target.play();
+    }
+  }
+
+  handleMouseLeave = (e) => {
+    if (this.hoverToPlay()) {
+      e.target.pause();
+      e.target.currentTime = 0;
+    }
+  }
+
+  hoverToPlay () {
+    const { attachment, autoPlayGif } = this.props;
+    return !autoPlayGif && attachment.get('type') === 'gifv';
+  }
+
+  handleClick = (e) => {
+    const { index, onClick } = this.props;
+
+    if (this.context.router && e.button === 0) {
+      e.preventDefault();
+      onClick(index);
+    }
+
+    e.stopPropagation();
+  }
+
+  render () {
+    const { attachment, index, size } = this.props;
+
+    let width  = 50;
+    let height = 100;
+    let top    = 'auto';
+    let left   = 'auto';
+    let bottom = 'auto';
+    let right  = 'auto';
+
+    if (size === 1) {
+      width = 100;
+    }
+
+    if (size === 4 || (size === 3 && index > 0)) {
+      height = 50;
+    }
+
+    if (size === 2) {
+      if (index === 0) {
+        right = '2px';
+      } else {
+        left = '2px';
+      }
+    } else if (size === 3) {
+      if (index === 0) {
+        right = '2px';
+      } else if (index > 0) {
+        left = '2px';
+      }
+
+      if (index === 1) {
+        bottom = '2px';
+      } else if (index > 1) {
+        top = '2px';
+      }
+    } else if (size === 4) {
+      if (index === 0 || index === 2) {
+        right = '2px';
+      }
+
+      if (index === 1 || index === 3) {
+        left = '2px';
+      }
+
+      if (index < 2) {
+        bottom = '2px';
+      } else {
+        top = '2px';
+      }
+    }
+
+    let thumbnail = '';
+
+    if (attachment.get('type') === 'image') {
+      const previewUrl = attachment.get('preview_url');
+      const previewWidth = attachment.getIn(['meta', 'small', 'width']);
+
+      const originalUrl = attachment.get('url');
+      const originalWidth = attachment.getIn(['meta', 'original', 'width']);
+
+      const hasSize = typeof originalWidth === 'number' && typeof previewWidth === 'number';
+
+      const srcSet = hasSize && `${originalUrl} ${originalWidth}w, ${previewUrl} ${previewWidth}w`;
+      const sizes = hasSize && `(min-width: 1025px) ${320 * (width / 100)}px, ${width}vw`;
+
+      thumbnail = (
+        <a
+          className='media-gallery__item-thumbnail'
+          href={attachment.get('remote_url') || originalUrl}
+          onClick={this.handleClick}
+          target='_blank'
+        >
+          <img src={previewUrl} srcSet={srcSet} sizes={sizes} alt='' />
+        </a>
+      );
+    } else if (attachment.get('type') === 'gifv') {
+      const autoPlay = !isIOS() && this.props.autoPlayGif;
+
+      thumbnail = (
+        <div className={`media-gallery__gifv ${autoPlay ? 'autoplay' : ''}`}>
+          <video
+            className='media-gallery__item-gifv-thumbnail'
+            role='application'
+            src={attachment.get('url')}
+            onClick={this.handleClick}
+            onMouseEnter={this.handleMouseEnter}
+            onMouseLeave={this.handleMouseLeave}
+            autoPlay={autoPlay}
+            loop
+            muted
+          />
+
+          <span className='media-gallery__gifv__label'>GIF</span>
+        </div>
+      );
+    }
+
+    return (
+      <div className='media-gallery__item' key={attachment.get('id')} style={{ left: left, top: top, right: right, bottom: bottom, width: `${width}%`, height: `${height}%` }}>
+        {thumbnail}
+      </div>
+    );
+  }
+
+}
+
+@injectIntl
+export default class MediaGallery extends React.PureComponent {
+
+  static propTypes = {
+    sensitive: PropTypes.bool,
+    media: ImmutablePropTypes.list.isRequired,
+    height: PropTypes.number.isRequired,
+    onOpenMedia: PropTypes.func.isRequired,
+    intl: PropTypes.object.isRequired,
+    autoPlayGif: PropTypes.bool,
+  };
+
+  static defaultProps = {
+    autoPlayGif: false,
+  };
+
+  state = {
+    visible: !this.props.sensitive,
+  };
+
+  handleOpen = () => {
+    this.setState({ visible: !this.state.visible });
+  }
+
+  handleClick = (index) => {
+    this.props.onOpenMedia(this.props.media, index);
+  }
+
+  render () {
+    const { media, intl, sensitive } = this.props;
+
+    let children;
+
+    if (!this.state.visible) {
+      let warning;
+
+      if (sensitive) {
+        warning = <FormattedMessage id='status.sensitive_warning' defaultMessage='Sensitive content' />;
+      } else {
+        warning = <FormattedMessage id='status.media_hidden' defaultMessage='Media hidden' />;
+      }
+
+      children = (
+        <div role='button' tabIndex='0' className='media-spoiler' onClick={this.handleOpen}>
+          <span className='media-spoiler__warning'>{warning}</span>
+          <span className='media-spoiler__trigger'><FormattedMessage id='status.sensitive_toggle' defaultMessage='Click to view' /></span>
+        </div>
+      );
+    } else {
+      const size = media.take(4).size;
+      children = media.take(4).map((attachment, i) => <Item key={attachment.get('id')} onClick={this.handleClick} attachment={attachment} autoPlayGif={this.props.autoPlayGif} index={i} size={size} />);
+    }
+
+    return (
+      <div className='media-gallery' style={{ height: `${this.props.height}px` }}>
+        <div className={`spoiler-button ${this.state.visible ? 'spoiler-button--visible' : ''}`}>
+          <IconButton title={intl.formatMessage(messages.toggle_visible)} icon={this.state.visible ? 'eye' : 'eye-slash'} overlay onClick={this.handleOpen} />
+        </div>
+
+        {children}
+      </div>
+    );
+  }
+
+}