From 974d712fbe5775903a4fec5ddc44b4069e68c925 Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Wed, 22 Feb 2017 15:43:07 +0100
Subject: [PATCH] Improve performance of compose form

---
 .../compose/components/compose_form.jsx       |  35 ++---
 .../compose/components/reply_indicator.jsx    |  17 ++-
 .../compose/components/unlisted_toggle.jsx    |  32 ++++
 .../containers/compose_form_container.jsx     | 137 ++++++++----------
 .../containers/reply_indicator_container.jsx  |  24 +++
 .../containers/unlisted_toggle_container.jsx  |  31 ++++
 .../ui/containers/status_list_container.jsx   |   4 +-
 .../components/reducers/compose.jsx           |   7 +-
 .../components/reducers/timelines.jsx         |   1 +
 app/assets/stylesheets/components.scss        |   2 +-
 10 files changed, 180 insertions(+), 110 deletions(-)
 create mode 100644 app/assets/javascripts/components/features/compose/components/unlisted_toggle.jsx
 create mode 100644 app/assets/javascripts/components/features/compose/containers/reply_indicator_container.jsx
 create mode 100644 app/assets/javascripts/components/features/compose/containers/unlisted_toggle_container.jsx

diff --git a/app/assets/javascripts/components/features/compose/components/compose_form.jsx b/app/assets/javascripts/components/features/compose/components/compose_form.jsx
index b901f73c3..45812def6 100644
--- a/app/assets/javascripts/components/features/compose/components/compose_form.jsx
+++ b/app/assets/javascripts/components/features/compose/components/compose_form.jsx
@@ -2,7 +2,7 @@ import CharacterCounter from './character_counter';
 import Button from '../../../components/button';
 import PureRenderMixin from 'react-addons-pure-render-mixin';
 import ImmutablePropTypes from 'react-immutable-proptypes';
-import ReplyIndicator from './reply_indicator';
+import ReplyIndicatorContainer from '../containers/reply_indicator_container';
 import UploadButton from './upload_button';
 import AutosuggestTextarea from '../../../components/autosuggest_textarea';
 import AutosuggestAccountContainer from '../../compose/containers/autosuggest_account_container';
@@ -11,6 +11,7 @@ import UploadButtonContainer from '../containers/upload_button_container';
 import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
 import Toggle from 'react-toggle';
 import Collapsable from '../../../components/collapsable';
+import UnlistedToggleContainer from '../containers/unlisted_toggle_container';
 
 const messages = defineMessages({
   placeholder: { id: 'compose_form.placeholder', defaultMessage: 'What is on your mind?' },
@@ -31,24 +32,23 @@ const ComposeForm = React.createClass({
     unlisted: React.PropTypes.bool,
     private: React.PropTypes.bool,
     fileDropDate: React.PropTypes.instanceOf(Date),
+    focusDate: React.PropTypes.instanceOf(Date),
+    preselectDate: React.PropTypes.instanceOf(Date),
     is_submitting: React.PropTypes.bool,
     is_uploading: React.PropTypes.bool,
-    in_reply_to: ImmutablePropTypes.map,
     media_count: React.PropTypes.number,
     me: React.PropTypes.number,
     needsPrivacyWarning: React.PropTypes.bool,
     mentionedDomains: React.PropTypes.array.isRequired,
     onChange: React.PropTypes.func.isRequired,
     onSubmit: React.PropTypes.func.isRequired,
-    onCancelReply: React.PropTypes.func.isRequired,
     onClearSuggestions: React.PropTypes.func.isRequired,
     onFetchSuggestions: React.PropTypes.func.isRequired,
     onSuggestionSelected: React.PropTypes.func.isRequired,
     onChangeSensitivity: React.PropTypes.func.isRequired,
     onChangeSpoilerness: React.PropTypes.func.isRequired,
     onChangeSpoilerText: React.PropTypes.func.isRequired,
-    onChangeVisibility: React.PropTypes.func.isRequired,
-    onChangeListability: React.PropTypes.func.isRequired,
+    onChangeVisibility: React.PropTypes.func.isRequired
   },
 
   mixins: [PureRenderMixin],
@@ -97,17 +97,13 @@ const ComposeForm = React.createClass({
     this.props.onChangeVisibility(e.target.checked);
   },
 
-  handleChangeListability (e) {
-    this.props.onChangeListability(e.target.checked);
-  },
-
   componentDidUpdate (prevProps) {
-    if ((prevProps.in_reply_to === null && this.props.in_reply_to !== null) || (prevProps.in_reply_to !== null && this.props.in_reply_to !== null && prevProps.in_reply_to.get('id') !== this.props.in_reply_to.get('id'))) {
+    if (this.props.focusDate !== prevProps.focusDate) {
       // If replying to zero or one users, places the cursor at the end of the textbox.
       // If replying to more than one user, selects any usernames past the first;
       // this provides a convenient shortcut to drop everyone else from the conversation.
-      const selectionStart = this.props.text.search(/\s/) + 1;
       const selectionEnd   = this.props.text.length;
+      const selectionStart = (this.props.preselectDate !== prevProps.preselectDate) ? (this.props.text.search(/\s/) + 1) : selectionEnd;
 
       this.autosuggestTextarea.textarea.setSelectionRange(selectionStart, selectionEnd);
       this.autosuggestTextarea.textarea.focus();
@@ -122,14 +118,9 @@ const ComposeForm = React.createClass({
     const { intl, needsPrivacyWarning, mentionedDomains } = this.props;
     const disabled = this.props.is_submitting || this.props.is_uploading;
 
-    let replyArea      = '';
     let publishText    = '';
     let privacyWarning = '';
-    let reply_to_other = !!this.props.in_reply_to && (this.props.in_reply_to.getIn(['account', 'id']) !== this.props.me);
-
-    if (this.props.in_reply_to) {
-      replyArea = <ReplyIndicator status={this.props.in_reply_to} onCancel={this.props.onCancelReply} />;
-    }
+    let reply_to_other = false;
 
     if (needsPrivacyWarning) {
       privacyWarning = (
@@ -158,7 +149,8 @@ const ComposeForm = React.createClass({
         </Collapsable>
 
         {privacyWarning}
-        {replyArea}
+
+        <ReplyIndicatorContainer />
 
         <AutosuggestTextarea
           ref={this.setAutosuggestTextarea}
@@ -190,12 +182,7 @@ const ComposeForm = React.createClass({
           <span className='compose-form__label__text'><FormattedMessage id='compose_form.private' defaultMessage='Mark as private' /></span>
         </label>
 
-        <Collapsable isVisible={!(this.props.private || reply_to_other)} fullHeight={39.5}>
-          <label className='compose-form__label'>
-            <Toggle checked={this.props.unlisted} onChange={this.handleChangeListability} />
-            <span className='compose-form__label__text'><FormattedMessage id='compose_form.unlisted' defaultMessage='Do not display on public timelines' /></span>
-          </label>
-        </Collapsable>
+        <UnlistedToggleContainer />
 
         <Collapsable isVisible={this.props.media_count > 0} fullHeight={39.5}>
           <label className='compose-form__label'>
diff --git a/app/assets/javascripts/components/features/compose/components/reply_indicator.jsx b/app/assets/javascripts/components/features/compose/components/reply_indicator.jsx
index 73e5ee99e..a72bd32c2 100644
--- a/app/assets/javascripts/components/features/compose/components/reply_indicator.jsx
+++ b/app/assets/javascripts/components/features/compose/components/reply_indicator.jsx
@@ -17,7 +17,7 @@ const ReplyIndicator = React.createClass({
   },
 
   propTypes: {
-    status: ImmutablePropTypes.map.isRequired,
+    status: ImmutablePropTypes.map,
     onCancel: React.PropTypes.func.isRequired,
     intl: React.PropTypes.object.isRequired
   },
@@ -36,17 +36,22 @@ const ReplyIndicator = React.createClass({
   },
 
   render () {
-    const { intl } = this.props;
-    const content  = { __html: emojify(this.props.status.get('content')) };
+    const { status, intl } = this.props;
+
+    if (!status) {
+      return null;
+    }
+
+    const content  = { __html: emojify(status.get('content')) };
 
     return (
       <div className='reply-indicator'>
         <div style={{ overflow: 'hidden', marginBottom: '5px' }}>
           <div style={{ float: 'right', lineHeight: '24px' }}><IconButton title={intl.formatMessage(messages.cancel)} icon='times' onClick={this.handleClick} /></div>
 
-          <a href={this.props.status.getIn(['account', 'url'])} onClick={this.handleAccountClick} className='reply-indicator__display-name' style={{ display: 'block', maxWidth: '100%', paddingRight: '25px', textDecoration: 'none', overflow: 'hidden', lineHeight: '24px' }}>
-            <div style={{ float: 'left', marginRight: '5px' }}><Avatar size={24} src={this.props.status.getIn(['account', 'avatar'])} /></div>
-            <DisplayName account={this.props.status.get('account')} />
+          <a href={status.getIn(['account', 'url'])} onClick={this.handleAccountClick} className='reply-indicator__display-name' style={{ display: 'block', maxWidth: '100%', paddingRight: '25px', textDecoration: 'none', overflow: 'hidden', lineHeight: '24px' }}>
+            <div style={{ float: 'left', marginRight: '5px' }}><Avatar size={24} src={status.getIn(['account', 'avatar'])} /></div>
+            <DisplayName account={status.get('account')} />
           </a>
         </div>
 
diff --git a/app/assets/javascripts/components/features/compose/components/unlisted_toggle.jsx b/app/assets/javascripts/components/features/compose/components/unlisted_toggle.jsx
new file mode 100644
index 000000000..0745051eb
--- /dev/null
+++ b/app/assets/javascripts/components/features/compose/components/unlisted_toggle.jsx
@@ -0,0 +1,32 @@
+import PureRenderMixin from 'react-addons-pure-render-mixin';
+import { FormattedMessage } from 'react-intl';
+import Toggle from 'react-toggle';
+import Collapsable from '../../../components/collapsable';
+
+const UnlistedToggle = React.createClass({
+
+  propTypes: {
+    isPrivate: React.PropTypes.bool,
+    isUnlisted: React.PropTypes.bool,
+    isReplyToOther: React.PropTypes.bool,
+    onChangeListability: React.PropTypes.func.isRequired
+  },
+
+  mixins: [PureRenderMixin],
+
+  render () {
+    const { isPrivate, isUnlisted, isReplyToOther, onChangeListability } = this.props;
+
+    return (
+      <Collapsable isVisible={!(isPrivate || isReplyToOther)} fullHeight={39.5}>
+        <label className='compose-form__label'>
+          <Toggle checked={isUnlisted} onChange={onChangeListability} />
+          <span className='compose-form__label__text'><FormattedMessage id='compose_form.unlisted' defaultMessage='Do not display on public timelines' /></span>
+        </label>
+      </Collapsable>
+    );
+  }
+
+});
+
+export default UnlistedToggle;
diff --git a/app/assets/javascripts/components/features/compose/containers/compose_form_container.jsx b/app/assets/javascripts/components/features/compose/containers/compose_form_container.jsx
index 2671ea618..bff273c15 100644
--- a/app/assets/javascripts/components/features/compose/containers/compose_form_container.jsx
+++ b/app/assets/javascripts/components/features/compose/containers/compose_form_container.jsx
@@ -3,7 +3,6 @@ import ComposeForm from '../components/compose_form';
 import {
   changeCompose,
   submitCompose,
-  cancelReplyCompose,
   clearComposeSuggestions,
   fetchComposeSuggestions,
   selectComposeSuggestion,
@@ -13,83 +12,69 @@ import {
   changeComposeVisibility,
   changeComposeListability
 } from '../../../actions/compose';
-import { makeGetStatus } from '../../../selectors';
 
-const makeMapStateToProps = () => {
-  const getStatus = makeGetStatus();
+const mapStateToProps = (state, props) => {
+  const mentionedUsernamesWithDomains = state.getIn(['compose', 'text']).match(/(?:^|[^\/\w])@([a-z0-9_]+@[a-z0-9\.\-]+)/ig);
 
-  const mapStateToProps = function (state, props) {
-    const mentionedUsernamesWithDomains = state.getIn(['compose', 'text']).match(/(?:^|[^\/\w])@([a-z0-9_]+@[a-z0-9\.\-]+)/ig);
-
-    return {
-      text: state.getIn(['compose', 'text']),
-      suggestion_token: state.getIn(['compose', 'suggestion_token']),
-      suggestions: state.getIn(['compose', 'suggestions']),
-      sensitive: state.getIn(['compose', 'sensitive']),
-      spoiler: state.getIn(['compose', 'spoiler']),
-      spoiler_text: state.getIn(['compose', 'spoiler_text']),
-      unlisted: state.getIn(['compose', 'unlisted'], ),
-      private: state.getIn(['compose', 'private']),
-      fileDropDate: state.getIn(['compose', 'fileDropDate']),
-      is_submitting: state.getIn(['compose', 'is_submitting']),
-      is_uploading: state.getIn(['compose', 'is_uploading']),
-      in_reply_to: getStatus(state, state.getIn(['compose', 'in_reply_to'])),
-      media_count: state.getIn(['compose', 'media_attachments']).size,
-      me: state.getIn(['compose', 'me']),
-      needsPrivacyWarning: state.getIn(['compose', 'private']) && mentionedUsernamesWithDomains !== null,
-      mentionedDomains: mentionedUsernamesWithDomains !== null ? [...new Set(mentionedUsernamesWithDomains.map(item => item.split('@')[2]))] : []
-    };
-  };
-
-  return mapStateToProps;
-};
-
-const mapDispatchToProps = function (dispatch) {
   return {
-    onChange (text) {
-      dispatch(changeCompose(text));
-    },
-
-    onSubmit () {
-      dispatch(submitCompose());
-    },
-
-    onCancelReply () {
-      dispatch(cancelReplyCompose());
-    },
-
-    onClearSuggestions () {
-      dispatch(clearComposeSuggestions());
-    },
-
-    onFetchSuggestions (token) {
-      dispatch(fetchComposeSuggestions(token));
-    },
-
-    onSuggestionSelected (position, token, accountId) {
-      dispatch(selectComposeSuggestion(position, token, accountId));
-    },
-
-    onChangeSensitivity (checked) {
-      dispatch(changeComposeSensitivity(checked));
-    },
-
-    onChangeSpoilerness (checked) {
-      dispatch(changeComposeSpoilerness(checked));
-    },
-
-    onChangeSpoilerText (checked) {
-      dispatch(changeComposeSpoilerText(checked));
-    },
-
-    onChangeVisibility (checked) {
-      dispatch(changeComposeVisibility(checked));
-    },
-
-    onChangeListability (checked) {
-      dispatch(changeComposeListability(checked));
-    }
-  }
+    text: state.getIn(['compose', 'text']),
+    suggestion_token: state.getIn(['compose', 'suggestion_token']),
+    suggestions: state.getIn(['compose', 'suggestions']),
+    sensitive: state.getIn(['compose', 'sensitive']),
+    spoiler: state.getIn(['compose', 'spoiler']),
+    spoiler_text: state.getIn(['compose', 'spoiler_text']),
+    unlisted: state.getIn(['compose', 'unlisted'], ),
+    private: state.getIn(['compose', 'private']),
+    fileDropDate: state.getIn(['compose', 'fileDropDate']),
+    focusDate: state.getIn(['compose', 'focusDate']),
+    preselectDate: state.getIn(['compose', 'preselectDate']),
+    is_submitting: state.getIn(['compose', 'is_submitting']),
+    is_uploading: state.getIn(['compose', 'is_uploading']),
+    media_count: state.getIn(['compose', 'media_attachments']).size,
+    me: state.getIn(['compose', 'me']),
+    needsPrivacyWarning: state.getIn(['compose', 'private']) && mentionedUsernamesWithDomains !== null,
+    mentionedDomains: mentionedUsernamesWithDomains !== null ? [...new Set(mentionedUsernamesWithDomains.map(item => item.split('@')[2]))] : []
+  };
 };
 
-export default connect(makeMapStateToProps, mapDispatchToProps)(ComposeForm);
+const mapDispatchToProps = (dispatch) => ({
+
+  onChange (text) {
+    dispatch(changeCompose(text));
+  },
+
+  onSubmit () {
+    dispatch(submitCompose());
+  },
+
+  onClearSuggestions () {
+    dispatch(clearComposeSuggestions());
+  },
+
+  onFetchSuggestions (token) {
+    dispatch(fetchComposeSuggestions(token));
+  },
+
+  onSuggestionSelected (position, token, accountId) {
+    dispatch(selectComposeSuggestion(position, token, accountId));
+  },
+
+  onChangeSensitivity (checked) {
+    dispatch(changeComposeSensitivity(checked));
+  },
+
+  onChangeSpoilerness (checked) {
+    dispatch(changeComposeSpoilerness(checked));
+  },
+
+  onChangeSpoilerText (checked) {
+    dispatch(changeComposeSpoilerText(checked));
+  },
+
+  onChangeVisibility (checked) {
+    dispatch(changeComposeVisibility(checked));
+  },
+
+});
+
+export default connect(mapStateToProps, mapDispatchToProps)(ComposeForm);
diff --git a/app/assets/javascripts/components/features/compose/containers/reply_indicator_container.jsx b/app/assets/javascripts/components/features/compose/containers/reply_indicator_container.jsx
new file mode 100644
index 000000000..39b48f3b6
--- /dev/null
+++ b/app/assets/javascripts/components/features/compose/containers/reply_indicator_container.jsx
@@ -0,0 +1,24 @@
+import { connect } from 'react-redux';
+import { cancelReplyCompose } from '../../../actions/compose';
+import { makeGetStatus } from '../../../selectors';
+import ReplyIndicator from '../components/reply_indicator';
+
+const makeMapStateToProps = () => {
+  const getStatus = makeGetStatus();
+
+  const mapStateToProps = (state, props) => ({
+    status: getStatus(state, state.getIn(['compose', 'in_reply_to'])),
+  });
+
+  return mapStateToProps;
+};
+
+const mapDispatchToProps = dispatch => ({
+
+  onCancel () {
+    dispatch(cancelReplyCompose());
+  }
+
+});
+
+export default connect(makeMapStateToProps, mapDispatchToProps)(ReplyIndicator);
diff --git a/app/assets/javascripts/components/features/compose/containers/unlisted_toggle_container.jsx b/app/assets/javascripts/components/features/compose/containers/unlisted_toggle_container.jsx
new file mode 100644
index 000000000..ceac903d9
--- /dev/null
+++ b/app/assets/javascripts/components/features/compose/containers/unlisted_toggle_container.jsx
@@ -0,0 +1,31 @@
+import { connect } from 'react-redux';
+import UnlistedToggle from '../components/unlisted_toggle';
+import { makeGetStatus } from '../../../selectors';
+import { changeComposeListability } from '../../../actions/compose';
+
+const makeMapStateToProps = () => {
+  const getStatus = makeGetStatus();
+
+  const mapStateToProps = state => {
+    const status = getStatus(state, state.getIn(['compose', 'in_reply_to']));
+    const me     = state.getIn(['compose', 'me']);
+
+    return {
+      isPrivate: state.getIn(['compose', 'private']),
+      isUnlisted: state.getIn(['compose', 'unlisted']),
+      isReplyToOther: status ? status.getIn(['account', 'id']) !== me : false
+    };
+  };
+
+  return mapStateToProps;
+};
+
+const mapDispatchToProps = dispatch => ({
+
+  onChangeListability (e) {
+    dispatch(changeComposeListability(e.target.checked));
+  }
+
+});
+
+export default connect(makeMapStateToProps, mapDispatchToProps)(UnlistedToggle);
diff --git a/app/assets/javascripts/components/features/ui/containers/status_list_container.jsx b/app/assets/javascripts/components/features/ui/containers/status_list_container.jsx
index c185d7eb0..bb6df1133 100644
--- a/app/assets/javascripts/components/features/ui/containers/status_list_container.jsx
+++ b/app/assets/javascripts/components/features/ui/containers/status_list_container.jsx
@@ -54,12 +54,12 @@ const mapDispatchToProps = (dispatch, { type, id }) => ({
     dispatch(expandTimeline(type, id));
   },
 
-  @debounce(300)
+  @debounce(100)
   onScrollToTop () {
     dispatch(scrollTopTimeline(type, true));
   },
 
-  @debounce(500)
+  @debounce(100)
   onScroll () {
     dispatch(scrollTopTimeline(type, false));
   }
diff --git a/app/assets/javascripts/components/reducers/compose.jsx b/app/assets/javascripts/components/reducers/compose.jsx
index 8d281048e..e401a2d98 100644
--- a/app/assets/javascripts/components/reducers/compose.jsx
+++ b/app/assets/javascripts/components/reducers/compose.jsx
@@ -35,6 +35,8 @@ const initialState = Immutable.Map({
   private: false,
   text: '',
   fileDropDate: null,
+  focusDate: null,
+  preselectDate: null,
   in_reply_to: null,
   is_submitting: false,
   is_uploading: false,
@@ -99,6 +101,7 @@ const insertSuggestion = (state, position, token, completion) => {
     map.update('text', oldText => `${oldText.slice(0, position)}${completion} ${oldText.slice(position + token.length)}`);
     map.set('suggestion_token', null);
     map.update('suggestions', Immutable.List(), list => list.clear());
+    map.set('focusDate', new Date());
   });
 };
 
@@ -128,6 +131,8 @@ export default function compose(state = initialState, action) {
       map.set('text', statusToTextMentions(state, action.status));
       map.set('unlisted', action.status.get('visibility') === 'unlisted' || state.get('default_privacy') === 'unlisted');
       map.set('private', action.status.get('visibility') === 'private' || state.get('default_privacy') === 'private');
+      map.set('focusDate', new Date());
+      map.set('preselectDate', new Date());
     });
   case COMPOSE_REPLY_CANCEL:
     return state.withMutations(map => {
@@ -156,7 +161,7 @@ export default function compose(state = initialState, action) {
   case COMPOSE_UPLOAD_PROGRESS:
     return state.set('progress', Math.round((action.loaded / action.total) * 100));
   case COMPOSE_MENTION:
-    return state.update('text', text => `${text}@${action.account.get('acct')} `);
+    return state.update('text', text => `${text}@${action.account.get('acct')} `).set('focusDate', new Date());
   case COMPOSE_SUGGESTIONS_CLEAR:
     return state.update('suggestions', Immutable.List(), list => list.clear()).set('suggestion_token', null);
   case COMPOSE_SUGGESTIONS_READY:
diff --git a/app/assets/javascripts/components/reducers/timelines.jsx b/app/assets/javascripts/components/reducers/timelines.jsx
index ffb49be78..6472ac6a0 100644
--- a/app/assets/javascripts/components/reducers/timelines.jsx
+++ b/app/assets/javascripts/components/reducers/timelines.jsx
@@ -249,6 +249,7 @@ const resetTimeline = (state, timeline, id) => {
         .set('isLoading', true)
         .set('loaded', false)
         .set('next', null)
+        .set('top', true)
         .update('items', list => list.clear()));
   } else {
     state = state.setIn([timeline, 'isLoading'], true);
diff --git a/app/assets/stylesheets/components.scss b/app/assets/stylesheets/components.scss
index 4b6bfca48..1d2b789bb 100644
--- a/app/assets/stylesheets/components.scss
+++ b/app/assets/stylesheets/components.scss
@@ -1080,7 +1080,7 @@ button.active i.fa-retweet {
   flex: 0 0 auto;
   cursor: pointer;
 
-  &.active {
+  &.active .fa {
     color: $color4;
     text-shadow: 0 0 10px rgba($color4, 0.4);
   }