Fix #12325

- In ReportActionItemMessageEdit.js change updateDraft's setState
- In ReportActionCompose.js change updateComment's setState
- In both changes, verify if the input has been manipulated.
If yes, mantain cursor position from previous state

src/pages/home/report/ReportActionCompose.js

@@ -383,9 +383,21 @@ class ReportActionCompose extends React.Component {
      */
     updateComment(comment, shouldDebounceSaveComment) {
         const newComment = EmojiUtils.replaceEmojis(comment);
-        this.setState({
-            isCommentEmpty: !!newComment.match(/^(\s|`)*$/),
-            value: newComment,
+        this.setState((prevState) => {
+            let newState = {
+                isCommentEmpty: !!newComment.match(/^(\s|`)*$/),
+                value: newComment
+            }
+
+            if(comment !== newComment) {
+                const remainder = prevState.value.slice(prevState.selection.end).length
+                newState.selection =  {
+                    start: newComment.length - remainder,
+                    end: newComment.length - remainder
+                }
+            }
+
+            return newState
         });
 
         // Indicate that draft has been created.

src/pages/home/report/ReportActionItemMessageEdit.js

@@ -102,7 +102,20 @@ class ReportActionItemMessageEdit extends React.Component {
      */
     updateDraft(draft) {
         const newDraft = EmojiUtils.replaceEmojis(draft);
-        this.setState({draft: newDraft});
+
+        this.setState((prevState) => {
+            let newState = {draft: newDraft}
+
+            if(draft !== newDraft) {
+                const remainder = prevState.draft.slice(prevState.selection.end).length
+                newState.selection =  {
+                    start: newDraft.length - remainder,
+                    end: newDraft.length - remainder
+                }
+            }
+
+            return newState
+        });
 
         // This component is rendered only when draft is set to a non-empty string. In order to prevent component
         // unmount when user deletes content of textarea, we set previous message instead of empty string.