From ccf4f3240ae80f4b1410d816f03d0bef33062a71 Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Sat, 27 Apr 2019 03:24:09 +0200
Subject: [PATCH] [Glitch] Add blurhash

Port front-end changes from fba96c808d25d2fc35ec63ee6745a1e55a95d707 to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>
---
 .../glitch/components/media_gallery.js        | 107 ++++++++++++------
 .../flavours/glitch/components/status.js      |   1 +
 .../report/components/status_check_box.js     |   1 +
 .../status/components/detailed_status.js      |   1 +
 .../features/ui/components/media_modal.js     |   1 +
 .../features/ui/components/video_modal.js     |   1 +
 .../flavours/glitch/features/video/index.js   |  48 ++++++--
 .../glitch/styles/components/index.scss       |  44 ++++++-
 .../glitch/styles/components/media.scss       |  17 +++
 .../glitch/styles/components/status.scss      |   9 +-
 10 files changed, 179 insertions(+), 51 deletions(-)

diff --git a/app/javascript/flavours/glitch/components/media_gallery.js b/app/javascript/flavours/glitch/components/media_gallery.js
index b7360bae47..d1dde45b1a 100644
--- a/app/javascript/flavours/glitch/components/media_gallery.js
+++ b/app/javascript/flavours/glitch/components/media_gallery.js
@@ -7,6 +7,7 @@ import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
 import { isIOS } from 'flavours/glitch/util/is_mobile';
 import classNames from 'classnames';
 import { autoPlayGif, displayMedia } from 'flavours/glitch/util/initial_state';
+import { decode } from 'blurhash';
 
 const messages = defineMessages({
   hidden: {
@@ -41,6 +42,7 @@ class Item extends React.PureComponent {
     letterbox: PropTypes.bool,
     onClick: PropTypes.func.isRequired,
     displayWidth: PropTypes.number,
+    visible: PropTypes.bool.isRequired,
   };
 
   static defaultProps = {
@@ -49,6 +51,10 @@ class Item extends React.PureComponent {
     size: 1,
   };
 
+  state = {
+    loaded: false,
+  };
+
   handleMouseEnter = (e) => {
     if (this.hoverToPlay()) {
       e.target.play();
@@ -82,8 +88,40 @@ class Item extends React.PureComponent {
     e.stopPropagation();
   }
 
+  componentDidMount () {
+    if (this.props.attachment.get('blurhash')) {
+      this._decode();
+    }
+  }
+
+  componentDidUpdate (prevProps) {
+    if (prevProps.attachment.get('blurhash') !== this.props.attachment.get('blurhash') && this.props.attachment.get('blurhash')) {
+      this._decode();
+    }
+  }
+
+  _decode () {
+    const hash   = this.props.attachment.get('blurhash');
+    const pixels = decode(hash, 32, 32);
+
+    if (pixels) {
+      const ctx       = this.canvas.getContext('2d');
+      const imageData = new ImageData(pixels, 32, 32);
+
+      ctx.putImageData(imageData, 0, 0);
+    }
+  }
+
+  setCanvasRef = c => {
+    this.canvas = c;
+  }
+
+  handleImageLoad = () => {
+    this.setState({ loaded: true });
+  }
+
   render () {
-    const { attachment, index, size, standalone, letterbox, displayWidth } = this.props;
+    const { attachment, index, size, standalone, letterbox, displayWidth, visible } = this.props;
 
     let width  = 50;
     let height = 100;
@@ -136,12 +174,20 @@ class Item extends React.PureComponent {
 
     let thumbnail = '';
 
-    if (attachment.get('type') === 'image') {
+    if (attachment.get('type') === 'unknown') {
+      return (
+        <div className={classNames('media-gallery__item', { standalone })} key={attachment.get('id')} style={{ left: left, top: top, right: right, bottom: bottom, width: `${width}%`, height: `${height}%` }}>
+          <a className='media-gallery__item-thumbnail' href={attachment.get('remote_url')} target='_blank' style={{ cursor: 'pointer' }} >
+            <canvas width={32} height={32} ref={this.setCanvasRef} className='media-gallery__preview' />
+          </a>
+        </div>
+      );
+    } else 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 originalUrl   = attachment.get('url');
+      const originalWidth = attachment.getIn(['meta', 'original', 'width']);
 
       const hasSize = typeof originalWidth === 'number' && typeof previewWidth === 'number';
 
@@ -168,6 +214,7 @@ class Item extends React.PureComponent {
             alt={attachment.get('description')}
             title={attachment.get('description')}
             style={{ objectPosition: letterbox ? null : `${x}% ${y}%` }}
+            onLoad={this.handleImageLoad}
           />
         </a>
       );
@@ -197,7 +244,8 @@ class Item extends React.PureComponent {
 
     return (
       <div className={classNames('media-gallery__item', { standalone, letterbox })} key={attachment.get('id')} style={{ left: left, top: top, right: right, bottom: bottom, width: `${width}%`, height: `${height}%` }}>
-        {thumbnail}
+        <canvas width={32} height={32} ref={this.setCanvasRef} className={classNames('media-gallery__preview', { 'media-gallery__preview--hidden': visible && this.state.loaded })} />
+        {visible && thumbnail}
       </div>
     );
   }
@@ -257,6 +305,7 @@ export default class MediaGallery extends React.PureComponent {
     this.node = node;
     if (node && node.offsetWidth && node.offsetWidth != this.state.width) {
       if (this.props.cacheWidth) this.props.cacheWidth(node.offsetWidth);
+
       this.setState({
         width: node.offsetWidth,
       });
@@ -275,7 +324,7 @@ export default class MediaGallery extends React.PureComponent {
 
     const width = this.state.width || defaultWidth;
 
-    let children;
+    let children, spoilerButton;
 
     const style = {};
 
@@ -289,40 +338,32 @@ export default class MediaGallery extends React.PureComponent {
       return (<div className={computedClass} ref={this.handleRef}></div>);
     }
 
-    if (!visible) {
-      let warning = <FormattedMessage {...(sensitive ? messages.warning : messages.hidden)} />;
+    if (this.isStandaloneEligible()) {
+      children = <Item standalone onClick={this.handleClick} attachment={media.get(0)} displayWidth={width} visible={visible} />;
+    } else {
+      children = media.take(4).map((attachment, i) => <Item key={attachment.get('id')} onClick={this.handleClick} attachment={attachment} index={i} size={size} letterbox={letterbox} displayWidth={width} visible={visible} />);
+    }
 
-      children = (
-        <button className='media-spoiler' type='button' onClick={this.handleOpen}>
-          <span className='media-spoiler__warning'>{warning}</span>
-          <span className='media-spoiler__trigger'><FormattedMessage {...messages.toggle} /></span>
+    if (visible) {
+      spoilerButton = <IconButton title={intl.formatMessage(messages.toggle_visible)} icon={visible ? 'eye' : 'eye-slash'} overlay onClick={this.handleOpen} />;
+    } else {
+      spoilerButton = (
+        <button type='button' onClick={this.handleOpen} className='spoiler-button__overlay'>
+          <span className='spoiler-button__overlay__label'>{sensitive ? <FormattedMessage id='status.sensitive_warning' defaultMessage='Sensitive content' /> : <FormattedMessage id='status.media_hidden' defaultMessage='Media hidden' />}</span>
         </button>
       );
-    } else {
-      if (this.isStandaloneEligible()) {
-        children = <Item standalone attachment={media.get(0)} onClick={this.handleClick} displayWidth={width} />;
-      } else {
-        children = media.take(4).map((attachment, i) => <Item key={attachment.get('id')} onClick={this.handleClick} attachment={attachment} index={i} size={size} letterbox={letterbox} displayWidth={width} />);
-      }
     }
 
     return (
       <div className={computedClass} style={style} ref={this.handleRef}>
-        {visible ? (
-          <div className='sensitive-info'>
-            <IconButton
-              icon='eye'
-              onClick={this.handleOpen}
-              overlay
-              title={intl.formatMessage(messages.toggle_visible)}
-            />
-            {sensitive ? (
-              <span className='sensitive-marker'>
-                <FormattedMessage {...messages.sensitive} />
-              </span>
-            ) : null}
-          </div>
-        ) : null}
+        <div className={classNames('spoiler-button', { 'spoiler-button--minified': visible })}>
+          {spoilerButton}
+          {visible && sensitive && (
+            <span className='sensitive-marker'>
+              <FormattedMessage {...messages.sensitive} />
+            </span>
+          )}
+        </div>
 
         {children}
       </div>
diff --git a/app/javascript/flavours/glitch/components/status.js b/app/javascript/flavours/glitch/components/status.js
index 94297260b3..5f10e0c52b 100644
--- a/app/javascript/flavours/glitch/components/status.js
+++ b/app/javascript/flavours/glitch/components/status.js
@@ -479,6 +479,7 @@ export default class Status extends ImmutablePureComponent {
           <Bundle fetchComponent={Video} loading={this.renderLoadingVideoPlayer} >
             {Component => (<Component
               preview={video.get('preview_url')}
+              blurhash={video.get('blurhash')}
               src={video.get('url')}
               alt={video.get('description')}
               inline
diff --git a/app/javascript/flavours/glitch/features/report/components/status_check_box.js b/app/javascript/flavours/glitch/features/report/components/status_check_box.js
index d674eecf94..cc49042fca 100644
--- a/app/javascript/flavours/glitch/features/report/components/status_check_box.js
+++ b/app/javascript/flavours/glitch/features/report/components/status_check_box.js
@@ -35,6 +35,7 @@ export default class StatusCheckBox extends React.PureComponent {
             {Component => (
               <Component
                 preview={video.get('preview_url')}
+                blurhash={video.get('blurhash')}
                 src={video.get('url')}
                 alt={video.get('description')}
                 width={239}
diff --git a/app/javascript/flavours/glitch/features/status/components/detailed_status.js b/app/javascript/flavours/glitch/features/status/components/detailed_status.js
index 8b35de0d49..0b162ed365 100644
--- a/app/javascript/flavours/glitch/features/status/components/detailed_status.js
+++ b/app/javascript/flavours/glitch/features/status/components/detailed_status.js
@@ -134,6 +134,7 @@ export default class DetailedStatus extends ImmutablePureComponent {
         media = (
           <Video
             preview={video.get('preview_url')}
+            blurhash={video.get('blurhash')}
             src={video.get('url')}
             alt={video.get('description')}
             inline
diff --git a/app/javascript/flavours/glitch/features/ui/components/media_modal.js b/app/javascript/flavours/glitch/features/ui/components/media_modal.js
index 1f3ac18eaf..39386ee1c3 100644
--- a/app/javascript/flavours/glitch/features/ui/components/media_modal.js
+++ b/app/javascript/flavours/glitch/features/ui/components/media_modal.js
@@ -123,6 +123,7 @@ export default class MediaModal extends ImmutablePureComponent {
         return (
           <Video
             preview={image.get('preview_url')}
+            blurhash={image.get('blurhash')}
             src={image.get('url')}
             width={image.get('width')}
             height={image.get('height')}
diff --git a/app/javascript/flavours/glitch/features/ui/components/video_modal.js b/app/javascript/flavours/glitch/features/ui/components/video_modal.js
index 69e0ee46e2..8c74d5a139 100644
--- a/app/javascript/flavours/glitch/features/ui/components/video_modal.js
+++ b/app/javascript/flavours/glitch/features/ui/components/video_modal.js
@@ -20,6 +20,7 @@ export default class VideoModal extends ImmutablePureComponent {
         <div>
           <Video
             preview={media.get('preview_url')}
+            blurhash={media.get('blurhash')}
             src={media.get('url')}
             startTime={time}
             onCloseVideo={onClose}
diff --git a/app/javascript/flavours/glitch/features/video/index.js b/app/javascript/flavours/glitch/features/video/index.js
index e3ed799c7e..aad24b1d99 100644
--- a/app/javascript/flavours/glitch/features/video/index.js
+++ b/app/javascript/flavours/glitch/features/video/index.js
@@ -6,6 +6,7 @@ import { throttle } from 'lodash';
 import classNames from 'classnames';
 import { isFullscreen, requestFullscreen, exitFullscreen } from 'flavours/glitch/util/fullscreen';
 import { displayMedia } from 'flavours/glitch/util/initial_state';
+import { decode } from 'blurhash';
 
 const messages = defineMessages({
   play: { id: 'video.play', defaultMessage: 'Play' },
@@ -104,6 +105,7 @@ export default class Video extends React.PureComponent {
     preventPlayback: PropTypes.bool,
     intl: PropTypes.object.isRequired,
     cacheWidth: PropTypes.func,
+    blurhash: PropTypes.string,
   };
 
   state = {
@@ -147,6 +149,7 @@ export default class Video extends React.PureComponent {
 
   setVideoRef = c => {
     this.video = c;
+
     if (this.video) {
       this.setState({ volume: this.video.volume, muted: this.video.muted });
     }
@@ -160,6 +163,10 @@ export default class Video extends React.PureComponent {
     this.volume = c;
   }
 
+  setCanvasRef = c => {
+    this.canvas = c;
+  }
+
   handleMouseDownRoot = e => {
     e.preventDefault();
     e.stopPropagation();
@@ -181,7 +188,6 @@ export default class Video extends React.PureComponent {
   }
 
   handleVolumeMouseDown = e => {
-
     document.addEventListener('mousemove', this.handleMouseVolSlide, true);
     document.addEventListener('mouseup', this.handleVolumeMouseUp, true);
     document.addEventListener('touchmove', this.handleMouseVolSlide, true);
@@ -201,7 +207,6 @@ export default class Video extends React.PureComponent {
   }
 
   handleMouseVolSlide = throttle(e => {
-
     const rect = this.volume.getBoundingClientRect();
     const x = (e.clientX - rect.left) / this.volWidth; //x position within the element.
 
@@ -272,6 +277,10 @@ export default class Video extends React.PureComponent {
     document.addEventListener('webkitfullscreenchange', this.handleFullscreenChange, true);
     document.addEventListener('mozfullscreenchange', this.handleFullscreenChange, true);
     document.addEventListener('MSFullscreenChange', this.handleFullscreenChange, true);
+
+    if (this.props.blurhash) {
+      this._decode();
+    }
   }
 
   componentWillUnmount () {
@@ -293,6 +302,24 @@ export default class Video extends React.PureComponent {
     }
   }
 
+  componentDidUpdate (prevProps) {
+    if (prevProps.blurhash !== this.props.blurhash && this.props.blurhash) {
+      this._decode();
+    }
+  }
+
+  _decode () {
+    const hash   = this.props.blurhash;
+    const pixels = decode(hash, 32, 32);
+
+    if (pixels) {
+      const ctx       = this.canvas.getContext('2d');
+      const imageData = new ImageData(pixels, 32, 32);
+
+      ctx.putImageData(imageData, 0, 0);
+    }
+  }
+
   handleFullscreenChange = () => {
     this.setState({ fullscreen: isFullscreen() });
   }
@@ -337,6 +364,7 @@ export default class Video extends React.PureComponent {
 
   handleOpenVideo = () => {
     const { src, preview, width, height, alt } = this.props;
+
     const media = fromJS({
       type: 'video',
       url: src,
@@ -385,6 +413,7 @@ export default class Video extends React.PureComponent {
     }
 
     let preload;
+
     if (startTime || fullscreen || dragging) {
       preload = 'auto';
     } else if (detailed) {
@@ -403,7 +432,9 @@ export default class Video extends React.PureComponent {
         onMouseDown={this.handleMouseDownRoot}
         tabIndex={0}
       >
-        <video
+        <canvas width={32} height={32} ref={this.setCanvasRef} className={classNames('media-gallery__preview', { 'media-gallery__preview--hidden': revealed })} />
+
+        {revealed && <video
           ref={this.setVideoRef}
           src={src}
           poster={preview}
@@ -423,12 +454,13 @@ export default class Video extends React.PureComponent {
           onLoadedData={this.handleLoadedData}
           onProgress={this.handleProgress}
           onVolumeChange={this.handleVolumeChange}
-        />
+        />}
 
-        <button type='button' className={classNames('video-player__spoiler', { active: !revealed })} onClick={this.toggleReveal}>
-          <span className='video-player__spoiler__title'>{warning}</span>
-          <span className='video-player__spoiler__subtitle'><FormattedMessage id='status.sensitive_toggle' defaultMessage='Click to view' /></span>
-        </button>
+        <div className={classNames('spoiler-button', { 'spoiler-button--hidden': revealed })}>
+          <button type='button' className='spoiler-button__overlay' onClick={this.toggleReveal}>
+            <span className='spoiler-button__overlay__label'>{warning}</span>
+          </button>
+        </div>
 
         <div className={classNames('video-player__controls', { active: paused || hovered })}>
           <div className='video-player__seek' onMouseDown={this.handleMouseDown} ref={this.setSeekRef}>
diff --git a/app/javascript/flavours/glitch/styles/components/index.scss b/app/javascript/flavours/glitch/styles/components/index.scss
index b098676b02..b323305cc2 100644
--- a/app/javascript/flavours/glitch/styles/components/index.scss
+++ b/app/javascript/flavours/glitch/styles/components/index.scss
@@ -1066,15 +1066,49 @@
 }
 
 .spoiler-button {
-  display: none;
-  left: 4px;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
   position: absolute;
-  text-shadow: 0 1px 1px $base-shadow-color, 1px 0 1px $base-shadow-color;
-  top: 4px;
   z-index: 100;
 
-  &.spoiler-button--visible {
+  &--minified {
     display: block;
+    left: 4px;
+    top: 4px;
+    width: auto;
+    height: auto;
+  }
+
+  &--hidden {
+    display: none;
+  }
+
+  &__overlay {
+    display: block;
+    background: transparent;
+    width: 100%;
+    height: 100%;
+    border: 0;
+
+    &__label {
+      display: inline-block;
+      background: rgba($base-overlay-background, 0.5);
+      border-radius: 8px;
+      padding: 8px 12px;
+      color: $primary-text-color;
+      font-weight: 500;
+      font-size: 14px;
+    }
+
+    &:hover,
+    &:focus,
+    &:active {
+      .spoiler-button__overlay__label {
+        background: rgba($base-overlay-background, 0.8);
+      }
+    }
   }
 }
 
diff --git a/app/javascript/flavours/glitch/styles/components/media.scss b/app/javascript/flavours/glitch/styles/components/media.scss
index fabef2a565..0393a38869 100644
--- a/app/javascript/flavours/glitch/styles/components/media.scss
+++ b/app/javascript/flavours/glitch/styles/components/media.scss
@@ -117,6 +117,8 @@
   text-decoration: none;
   color: $secondary-text-color;
   line-height: 0;
+  position: relative;
+  z-index: 1;
 
   &,
   img {
@@ -131,6 +133,21 @@
   }
 }
 
+.media-gallery__preview {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+  position: absolute;
+  top: 0;
+  left: 0;
+  z-index: 0;
+  background: $base-overlay-background;
+
+  &--hidden {
+    display: none;
+  }
+}
+
 .media-gallery__gifv {
   height: 100%;
   overflow: hidden;
diff --git a/app/javascript/flavours/glitch/styles/components/status.scss b/app/javascript/flavours/glitch/styles/components/status.scss
index b656f0baf7..fb031258f9 100644
--- a/app/javascript/flavours/glitch/styles/components/status.scss
+++ b/app/javascript/flavours/glitch/styles/components/status.scss
@@ -705,7 +705,7 @@
 
     & > div {
       background: rgba($base-shadow-color, 0.6);
-      border-radius: 4px;
+      border-radius: 8px;
       padding: 12px 9px;
       flex: 0 0 auto;
       display: flex;
@@ -716,19 +716,18 @@
     button,
     a {
       display: inline;
-      color: $primary-text-color;
+      color: $secondary-text-color;
       background: transparent;
       border: 0;
-      padding: 0 5px;
+      padding: 0 8px;
       text-decoration: none;
-      opacity: 0.6;
       font-size: 18px;
       line-height: 18px;
 
       &:hover,
       &:active,
       &:focus {
-        opacity: 1;
+        color: $primary-text-color;
       }
     }