Fix editing formatted messages in plain text editor (#7360)

* Fix editing formatted messages in plain text editor

* Update changelog.d/7359.sdk

Co-authored-by: Benoit Marty <benoitm@matrix.org>

Co-authored-by: Benoit Marty <benoitm@matrix.org>

changelog.d/7359.bugfix

@@ -0,0 +1 @@
+Fix editing formatted messages with plain text editor

changelog.d/7359.sdk

@@ -0,0 +1 @@
+Allow getting the formatted or plain text body of a message for the fun `TimelineEvent.getTextEditableContent()`.

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/timeline/TimelineEvent.kt

@@ -181,9 +181,13 @@ fun TimelineEvent.isRootThread(): Boolean {
 /**
  * Get the latest message body, after a possible edition, stripping the reply prefix if necessary.
  */
-fun TimelineEvent.getTextEditableContent(): String {
+fun TimelineEvent.getTextEditableContent(formatted: Boolean): String {
     val lastMessageContent = getLastMessageContent()
-    val lastContentBody = lastMessageContent.getFormattedBody() ?: return ""
+    val lastContentBody = if (formatted && lastMessageContent is MessageContentWithFormattedBody) {
+        lastMessageContent.formattedBody
+    } else {
+        lastMessageContent?.body
+    } ?: return ""
     return if (isReply()) {
         extractUsefulTextFromReply(lastContentBody)
     } else {
@@ -201,11 +205,3 @@ fun MessageContent.getTextDisplayableContent(): String {
             ?: (this as MessageTextContent?)?.matrixFormattedBody?.let { ContentUtils.formatSpoilerTextFromHtml(it) }
             ?: body
 }
-
-fun MessageContent?.getFormattedBody(): String? {
-    return if (this is MessageContentWithFormattedBody) {
-        formattedBody
-    } else {
-        this?.body
-    }
-}

vector/src/main/java/im/vector/app/features/home/room/detail/composer/MessageComposerViewModel.kt

@@ -151,7 +151,8 @@ class MessageComposerViewModel @AssistedInject constructor(
 
     private fun handleEnterEditMode(action: MessageComposerAction.EnterEditMode) {
         room.getTimelineEvent(action.eventId)?.let { timelineEvent ->
-            setState { copy(sendMode = SendMode.Edit(timelineEvent, timelineEvent.getTextEditableContent())) }
+            val formatted = vectorPreferences.isRichTextEditorEnabled()
+            setState { copy(sendMode = SendMode.Edit(timelineEvent, timelineEvent.getTextEditableContent(formatted))) }
         }
     }
 
@@ -552,7 +553,7 @@ class MessageComposerViewModel @AssistedInject constructor(
                                     state.sendMode.timelineEvent,
                                     messageContent?.msgType ?: MessageType.MSGTYPE_TEXT,
                                     action.text,
-                                    (messageContent as? MessageContentWithFormattedBody)?.formattedBody,
+                                    action.formattedText,
                                     action.autoMarkdown
                             )
                         } else {