Don't warn about the effects of redacting state events when redacting non-state-events

src/components/views/dialogs/ConfirmAndWaitRedactDialog.tsx

@@ -15,6 +15,7 @@ limitations under the License.
 */
 
 import React from "react";
+import { MatrixEvent } from "matrix-js-sdk/src/models/event";
 
 import { _t } from "../../../languageHandler";
 import ConfirmRedactDialog from "./ConfirmRedactDialog";
@@ -23,6 +24,7 @@ import BaseDialog from "./BaseDialog";
 import Spinner from "../elements/Spinner";
 
 interface IProps {
+    event: MatrixEvent;
     redact: () => Promise<void>;
     onFinished: (success?: boolean) => void;
 }
@@ -91,7 +93,7 @@ export default class ConfirmAndWaitRedactDialog extends React.PureComponent<IPro
                 );
             }
         } else {
-            return <ConfirmRedactDialog onFinished={this.onParentFinished} />;
+            return <ConfirmRedactDialog event={this.props.event} onFinished={this.onParentFinished} />;
         }
     }
 }

src/components/views/dialogs/ConfirmRedactDialog.tsx

@@ -26,6 +26,7 @@ import ErrorDialog from "./ErrorDialog";
 import TextInputDialog from "./TextInputDialog";
 
 interface IProps {
+    event: MatrixEvent;
     onFinished(success?: false, reason?: void): void;
     onFinished(success: true, reason?: string): void;
 }
@@ -35,14 +36,16 @@ interface IProps {
  */
 export default class ConfirmRedactDialog extends React.Component<IProps> {
     public render(): React.ReactNode {
+        let description = _t("Are you sure you wish to remove (delete) this event?");
+        if (this.props.event.isState()) {
+            description += " " + _t("Note that removing room changes like this could undo the change.");
+        }
+
         return (
             <TextInputDialog
                 onFinished={this.props.onFinished}
                 title={_t("Confirm Removal")}
-                description={_t(
-                    "Are you sure you wish to remove (delete) this event? " +
-                        "Note that if you delete a room name or topic change, it could undo the change.",
-                )}
+                description={description}
                 placeholder={_t("Reason (optional)")}
                 focus
                 button={_t("Remove")}
@@ -68,6 +71,7 @@ export function createRedactEventDialog({
     Modal.createDialog(
         ConfirmRedactDialog,
         {
+            event: mxEvent,
             onFinished: async (proceed, reason): Promise<void> => {
                 if (!proceed) return;
 

src/components/views/messages/EditHistoryMessage.tsx

@@ -79,6 +79,7 @@ export default class EditHistoryMessage extends React.PureComponent<IProps, ISta
         Modal.createDialog(
             ConfirmAndWaitRedactDialog,
             {
+                event,
                 redact: async () => {
                     await cli.redactEvent(event.getRoomId()!, event.getId()!);
                 },

src/i18n/strings/en_EN.json

@@ -2739,8 +2739,9 @@
     "Changelog": "Changelog",
     "You cannot delete this message. (%(code)s)": "You cannot delete this message. (%(code)s)",
     "Removing…": "Removing…",
+    "Are you sure you wish to remove (delete) this event?": "Are you sure you wish to remove (delete) this event?",
+    "Note that removing room changes like this could undo the change.": "Note that removing room changes like this could undo the change.",
     "Confirm Removal": "Confirm Removal",
-    "Are you sure you wish to remove (delete) this event? Note that if you delete a room name or topic change, it could undo the change.": "Are you sure you wish to remove (delete) this event? Note that if you delete a room name or topic change, it could undo the change.",
     "Reason (optional)": "Reason (optional)",
     "Clear all data in this session?": "Clear all data in this session?",
     "Clearing all data from this session is permanent. Encrypted messages will be lost unless their keys have been backed up.": "Clearing all data from this session is permanent. Encrypted messages will be lost unless their keys have been backed up.",