Clean up collapsible components

app/assets/javascripts/components/components/collapsable.jsx

@@ -0,0 +1,19 @@
+import { Motion, spring } from 'react-motion';
+
+const Collapsable = ({ fullHeight, isVisible, children }) => (
+  <Motion defaultStyle={{ opacity: !isVisible ? 0 : 100, height: isVisible ? fullHeight : 0 }} style={{ opacity: spring(!isVisible ? 0 : 100), height: spring(!isVisible ? 0 : fullHeight) }}>
+    {({ opacity, height }) =>
+      <div style={{ height: `${height}px`, overflow: 'hidden', opacity: opacity / 100, display: Math.floor(opacity) === 0 ? 'none' : 'block' }}>
+        {children}
+      </div>
+    }
+  </Motion>
+);
+
+Collapsable.propTypes = {
+  fullHeight: React.PropTypes.number.isRequired,
+  isVisible: React.PropTypes.bool.isRequired,
+  children: React.PropTypes.node.isRequired
+};
+
+export default Collapsable;

app/assets/javascripts/components/features/compose/components/compose_form.jsx

@@ -10,7 +10,7 @@ import { debounce } from 'react-decoration';
 import UploadButtonContainer from '../containers/upload_button_container';
 import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
 import Toggle from 'react-toggle';
-import { Motion, spring } from 'react-motion';
+import Collapsable from '../../../components/collapsable';
 
 const messages = defineMessages({
   placeholder: { id: 'compose_form.placeholder', defaultMessage: 'What is on your mind?' },
@@ -136,13 +136,11 @@ const ComposeForm = React.createClass({
 
     return (
       <div style={{ padding: '10px' }}>
-        <Motion defaultStyle={{ opacity: !this.props.spoiler ? 0 : 100, height: !this.props.spoiler ? 50 : 0 }} style={{ opacity: spring(!this.props.spoiler ? 0 : 100), height: spring(!this.props.spoiler ? 0 : 50) }}>
+        <Collapsable isVisible={this.props.spoiler} fullHeight={50}>
-          {({ opacity, height }) =>
+          <div className="spoiler-input">
-            <div className="spoiler-input" style={{ height: `${height}px`, overflow: 'hidden', opacity: opacity / 100 }}>
             <input placeholder={intl.formatMessage(messages.spoiler_placeholder)} value={this.props.spoiler_text} onChange={this.handleChangeSpoilerText} type="text" className="spoiler-input__input" />
           </div>
-          }
+        </Collapsable>
-        </Motion>
 
         {replyArea}
 
@@ -176,23 +174,19 @@ const ComposeForm = React.createClass({
           <span className='compose-form__label__text'><FormattedMessage id='compose_form.private' defaultMessage='Mark as private' /></span>
         </label>
 
-        <Motion defaultStyle={{ opacity: (this.props.private || reply_to_other) ? 0 : 100, height: (this.props.private || reply_to_other) ? 39.5 : 0 }} style={{ opacity: spring((this.props.private || reply_to_other) ? 0 : 100), height: spring((this.props.private || reply_to_other) ? 0 : 39.5) }}>
+        <Collapsable isVisible={!(this.props.private || reply_to_other)} fullHeight={39.5}>
-          {({ opacity, height }) =>
+          <label className='compose-form__label'>
-            <label className='compose-form__label' style={{ height: `${height}px`, overflow: 'hidden', opacity: opacity / 100 }}>
             <Toggle checked={this.props.unlisted} onChange={this.handleChangeListability} />
             <span className='compose-form__label__text'><FormattedMessage id='compose_form.unlisted' defaultMessage='Do not display in public timeline' /></span>
           </label>
-          }
+        </Collapsable>
-        </Motion>
 
-        <Motion defaultStyle={{ opacity: 0, height: 0 }} style={{ opacity: spring(this.props.media_count === 0 ? 0 : 100), height: spring(this.props.media_count === 0 ? 0 : 39.5) }}>
+        <Collapsable isVisible={this.props.media_count > 0} fullHeight={39.5}>
-          {({ opacity, height }) =>
+          <label className='compose-form__label'>
-            <label className='compose-form__label' style={{ height: `${height}px`, overflow: 'hidden', opacity: opacity / 100 }}>
             <Toggle checked={this.props.sensitive} onChange={this.handleChangeSensitivity} />
             <span className='compose-form__label__text'><FormattedMessage id='compose_form.sensitive' defaultMessage='Mark media as sensitive' /></span>
           </label>
-          }
+        </Collapsable>
-        </Motion>
       </div>
     );
   }

app/assets/javascripts/components/reducers/compose.jsx

@@ -89,7 +89,7 @@ function removeMedia(state, mediaId) {
     map.update('text', text => text.replace(media.get('text_url'), '').trim());
 
     if (prevSize === 1) {
-      map.update('sensitive', false);
+      map.set('sensitive', false);
     }
   });
 };