Fix caret position after inserting suggestions (fixes #281)

app/javascript/flavours/glitch/features/composer/index.js

@@ -56,6 +56,7 @@ function mapStateToProps (state) {
     advancedOptions: state.getIn(['compose', 'advanced_options']),
     amUnlocked: !state.getIn(['accounts', me, 'locked']),
     focusDate: state.getIn(['compose', 'focusDate']),
+    caretPosition: state.getIn(['compose', 'caretPosition']),
     isSubmitting: state.getIn(['compose', 'is_submitting']),
     isUploading: state.getIn(['compose', 'is_uploading']),
     layout: state.getIn(['local_settings', 'layout']),
@@ -117,7 +118,6 @@ const handlers = {
   handleEmoji (data) {
     const { textarea: { selectionStart } } = this;
     const { onInsertEmoji } = this.props;
-    this.caretPos = selectionStart + data.native.length + 1;
     if (onInsertEmoji) {
       onInsertEmoji(selectionStart, data);
     }
@@ -139,7 +139,6 @@ const handlers = {
   //  Selects a suggestion from the autofill.
   handleSelect (tokenStart, token, value) {
     const { onSelectSuggestion } = this.props;
-    this.caretPos = null;
     if (onSelectSuggestion) {
       onSelectSuggestion(tokenStart, token, value);
     }
@@ -191,7 +190,6 @@ class Composer extends React.Component {
     assignHandlers(this, handlers);
 
     //  Instance variables.
-    this.caretPos = null;
     this.textarea = null;
   }
 
@@ -220,11 +218,11 @@ class Composer extends React.Component {
   //        everyone else from the conversation.
   componentDidUpdate (prevProps) {
     const {
-      caretPos,
       textarea,
     } = this;
     const {
       focusDate,
+      caretPosition,
       isSubmitting,
       preselectDate,
       text,
@@ -238,8 +236,8 @@ class Composer extends React.Component {
         selectionStart = text.search(/\s/) + 1;
         selectionEnd = text.length;
         break;
-      case !isNaN(caretPos) && caretPos !== null:
-        selectionStart = selectionEnd = caretPos;
+      case !isNaN(caretPosition) && caretPosition !== null:
+        selectionStart = selectionEnd = caretPosition;
         break;
       default:
         selectionStart = selectionEnd = text.length;
@@ -396,6 +394,7 @@ Composer.propTypes = {
   advancedOptions: ImmutablePropTypes.map,
   amUnlocked: PropTypes.bool,
   focusDate: PropTypes.instanceOf(Date),
+  caretPosition: PropTypes.number,
   isSubmitting: PropTypes.bool,
   isUploading: PropTypes.bool,
   layout: PropTypes.string,