Add lang html attr to each posts (#18544)

app/javascript/mastodon/components/status_content.js

@@ -176,6 +176,7 @@ export default class StatusContent extends React.PureComponent {
 
     const content = { __html: status.get('contentHtml') };
     const spoilerContent = { __html: status.get('spoilerHtml') };
+    const lang = status.get('language');
     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,
@@ -212,14 +213,14 @@ export default class StatusContent extends React.PureComponent {
       return (
         <div className={classNames} ref={this.setRef} tabIndex='0' onMouseDown={this.handleMouseDown} onMouseUp={this.handleMouseUp} onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave}>
           <p style={{ marginBottom: hidden && status.get('mentions').isEmpty() ? '0px' : null }}>
-            <span dangerouslySetInnerHTML={spoilerContent} className='translate' />
+            <span dangerouslySetInnerHTML={spoilerContent} className='translate' lang={lang} />
             {' '}
             <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' : ''} translate`} dangerouslySetInnerHTML={content} />
+          <div tabIndex={!hidden ? 0 : null} className={`status__content__text ${!hidden ? 'status__content__text--visible' : ''} translate`} lang={lang} dangerouslySetInnerHTML={content} />
 
           {!hidden && !!status.get('poll') && <PollContainer pollId={status.get('poll')} />}
 
@@ -229,7 +230,7 @@ export default class StatusContent extends React.PureComponent {
     } else if (this.props.onClick) {
       const output = [
         <div className={classNames} ref={this.setRef} tabIndex='0' onMouseDown={this.handleMouseDown} onMouseUp={this.handleMouseUp} key='status-content' onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave}>
-          <div className='status__content__text status__content__text--visible translate' dangerouslySetInnerHTML={content} />
+          <div className='status__content__text status__content__text--visible translate' lang={lang} dangerouslySetInnerHTML={content} />
 
           {!!status.get('poll') && <PollContainer pollId={status.get('poll')} />}
 
@@ -245,7 +246,7 @@ export default class StatusContent extends React.PureComponent {
     } else {
       return (
         <div className={classNames} ref={this.setRef} tabIndex='0' onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave}>
-          <div className='status__content__text status__content__text--visible translate' dangerouslySetInnerHTML={content} />
+          <div className='status__content__text status__content__text--visible translate' lang={lang} dangerouslySetInnerHTML={content} />
 
           {!!status.get('poll') && <PollContainer pollId={status.get('poll')} />}
 

app/views/statuses/_detailed_status.html.haml

@@ -20,7 +20,7 @@
       %p<
         %span.p-summary> #{prerender_custom_emojis(h(status.spoiler_text), status.emojis)}&nbsp;
         %button.status__content__spoiler-link= t('statuses.show_more')
-    .e-content
+    .e-content{ :lang => status.language }
       = prerender_custom_emojis(status_content_format(status), status.emojis)
 
       - if status.preloadable_poll

app/views/statuses/_simple_status.html.haml

@@ -32,7 +32,7 @@
       %p<
         %span.p-summary> #{prerender_custom_emojis(h(status.spoiler_text), status.emojis)}&nbsp;
         %button.status__content__spoiler-link= t('statuses.show_more')
-    .e-content
+    .e-content{ :lang => status.language }
       = prerender_custom_emojis(status_content_format(status), status.emojis)
 
       - if status.preloadable_poll