Fix autoPlayGif

app/gabsocial/components/media_gallery.js

@@ -61,7 +61,8 @@ class Item extends React.PureComponent {
 
   hoverToPlay() {
     const { attachment, autoPlayGif } = this.props;
-    return !autoPlayGif && attachment.get('type') === 'gifv';
+    return !autoPlayGif &&
+      (attachment.get('type') === 'gifv' || attachment.getIn(['pleroma', 'mime_type']) === 'image/gif');
   }
 
   handleClick = (e) => {
@@ -72,7 +73,7 @@ class Item extends React.PureComponent {
       e.preventDefault();
     } else {
       if (e.button === 0 && !(e.ctrlKey || e.metaKey)) {
-        if (this.hoverToPlay()) {
+        if (!this.canvas && this.hoverToPlay()) {
           e.target.pause();
           e.target.currentTime = 0;
         }
@@ -112,8 +113,19 @@ class Item extends React.PureComponent {
     this.canvas = c;
   }
 
+  setImageRef = i => {
+    this.image = i;
+  }
+
   handleImageLoad = () => {
     this.setState({ loaded: true });
+    if (this.hoverToPlay()) {
+      const image = this.image;
+      const canvas = this.canvas;
+      canvas.width = image.naturalWidth;
+      canvas.height = image.naturalHeight;
+      canvas.getContext('2d').drawImage(image, 0, 0);
+    }
   }
 
   render() {
@@ -168,7 +180,7 @@ class Item extends React.PureComponent {
 
       thumbnail = (
         <a
-          className='media-gallery__item-thumbnail'
+          className={classNames('media-gallery__item-thumbnail', { 'media-gallery__item-thumbnail--play-on-hover': this.hoverToPlay() })}
           href={attachment.get('remote_url') || originalUrl}
           onClick={this.handleClick}
           target='_blank'
@@ -181,7 +193,9 @@ class Item extends React.PureComponent {
             title={attachment.get('description')}
             style={{ objectPosition: `${x}% ${y}%` }}
             onLoad={this.handleImageLoad}
+            ref={this.setImageRef}
           />
+          {this.hoverToPlay() && <canvas ref={this.setCanvasRef} style={{ objectPosition: `${x}% ${y}%` }} />}
         </a>
       );
     } else if (attachment.get('type') === 'gifv') {

app/styles/gabsocial/components.scss

@@ -3525,14 +3525,48 @@ a.status-card.compact:hover {
   z-index: 1;
 
   &,
-  img {
+  img,
+  canvas {
     height: 100%;
     width: 100%;
   }
 
-  img {
+  img,
+  canvas {
     object-fit: cover;
   }
+
+  &--play-on-hover {
+    &::before {
+      content: 'GIF';
+      position: absolute;
+      color: $primary-text-color;
+      background: rgba($base-overlay-background, 0.5);
+      bottom: 6px;
+      left: 6px;
+      padding: 2px 6px;
+      border-radius: 2px;
+      font-size: 11px;
+      font-weight: 600;
+      pointer-events: none;
+      opacity: 0.9;
+      transition: opacity 0.1s ease;
+      line-height: 18px;
+    }
+
+    img {
+      position: absolute;
+    }
+
+    img,
+    &:hover::before {
+      visibility: hidden;
+    }
+
+    &:hover img {
+      visibility: visible;
+    }
+  }
 }
 
 .media-gallery__preview {