Allow to open a modal for embedded photo (#5777)

app/javascript/mastodon/features/status/components/card.js

 import React from 'react';
 import PropTypes from 'prop-types';
+import Immutable from 'immutable';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import punycode from 'punycode';
 import classnames from 'classnames';
@@ -24,6 +25,7 @@ export default class Card extends React.PureComponent {
   static propTypes = {
     card: ImmutablePropTypes.map,
     maxDescription: PropTypes.number,
+    onOpenMedia: PropTypes.func.isRequired,
   };
 
   static defaultProps = {
@@ -34,6 +36,27 @@ export default class Card extends React.PureComponent {
     width: 0,
   };
 
+  handlePhotoClick = () => {
+    const { card, onOpenMedia } = this.props;
+
+    onOpenMedia(
+      Immutable.fromJS([
+        {
+          type: 'image',
+          url: card.get('url'),
+          description: card.get('title'),
+          meta: {
+            original: {
+              width: card.get('width'),
+              height: card.get('height'),
+            },
+          },
+        },
+      ]),
+      0
+    );
+  };
+
   renderLink () {
     const { card, maxDescription } = this.props;
 
@@ -73,9 +96,16 @@ export default class Card extends React.PureComponent {
     const { card } = this.props;
 
     return (
-      <a href={card.get('url')} className='status-card-photo' target='_blank' rel='noopener'>
-        <img src={card.get('url')} alt={card.get('title')} width={card.get('width')} height={card.get('height')} />
-      </a>
+      <img
+        className='status-card-photo'
+        onClick={this.handlePhotoClick}
+        role='button'
+        tabIndex='0'
+        src={card.get('url')}
+        alt={card.get('title')}
+        width={card.get('width')}
+        height={card.get('height')}
+      />
     );
   }
 

app/javascript/mastodon/features/status/components/detailed_status.js

@@ -73,7 +73,7 @@ export default class DetailedStatus extends ImmutablePureComponent {
         );
       }
     } else if (status.get('spoiler_text').length === 0) {
-      media = <CardContainer statusId={status.get('id')} />;
+      media = <CardContainer onOpenMedia={this.props.onOpenMedia} statusId={status.get('id')} />;
     }
 
     if (status.get('application')) {

app/javascript/mastodon/features/ui/components/image_loader.js

@@ -7,7 +7,7 @@ export default class ImageLoader extends React.PureComponent {
   static propTypes = {
     alt: PropTypes.string,
     src: PropTypes.string.isRequired,
-    previewSrc: PropTypes.string.isRequired,
+    previewSrc: PropTypes.string,
     width: PropTypes.number,
     height: PropTypes.number,
   }
@@ -47,7 +47,7 @@ export default class ImageLoader extends React.PureComponent {
     this.removeEventListeners();
     this.setState({ loading: true, error: false });
     Promise.all([
-      this.loadPreviewCanvas(props),
+      props.previewSrc && this.loadPreviewCanvas(props),
       this.hasSize() && this.loadOriginalImage(props),
     ].filter(Boolean))
       .then(() => {

app/javascript/mastodon/features/ui/components/media_modal.js

@@ -92,7 +92,7 @@ export default class MediaModal extends ImmutablePureComponent {
       const height = image.getIn(['meta', 'original', 'height']) || null;
 
       if (image.get('type') === 'image') {
-        return <ImageLoader previewSrc={image.get('preview_url')} src={image.get('url')} width={width} height={height} alt={image.get('description')} key={image.get('preview_url')} />;
+        return <ImageLoader previewSrc={image.get('preview_url')} src={image.get('url')} width={width} height={height} alt={image.get('description')} key={image.get('url')} />;
       } else if (image.get('type') === 'gifv') {
         return <ExtendedVideoPlayer src={image.get('url')} muted controls={false} width={width} height={height} key={image.get('preview_url')} alt={image.get('description')} />;
       }

app/javascript/styles/mastodon/components.scss

@@ -2182,15 +2182,12 @@ button.icon-button.active i.fa-retweet {
 }
 
 .status-card-photo {
+  cursor: zoom-in;
   display: block;
   text-decoration: none;
-
-  img {
-    display: block;
-    width: 100%;
-    height: auto;
-    margin: 0;
-  }
+  width: 100%;
+  height: auto;
+  margin: 0;
 }
 
 .status-card-video {