Do not allow caption on audio files.

Regular files are not previewed, but prevent caption as well there.

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/attachments/preview/AttachmentsPreviewState.kt

@@ -9,6 +9,9 @@ package io.element.android.features.messages.impl.attachments.preview
 
 import androidx.compose.runtime.Immutable
 import io.element.android.features.messages.impl.attachments.Attachment
+import io.element.android.libraries.core.bool.orFalse
+import io.element.android.libraries.core.mimetype.MimeTypes.isMimeTypeImage
+import io.element.android.libraries.core.mimetype.MimeTypes.isMimeTypeVideo
 import io.element.android.libraries.textcomposer.model.TextEditorState
 
 data class AttachmentsPreviewState(
@@ -16,7 +19,11 @@ data class AttachmentsPreviewState(
     val sendActionState: SendActionState,
     val textEditorState: TextEditorState,
     val eventSink: (AttachmentsPreviewEvents) -> Unit
-)
+) {
+    val allowCaption: Boolean = (attachment as? Attachment.Media)?.localMedia?.info?.mimeType?.let {
+        it.isMimeTypeImage() || it.isMimeTypeVideo()
+    }.orFalse()
+}
 
 @Immutable
 sealed interface SendActionState {

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/attachments/preview/AttachmentsPreviewView.kt

@@ -176,7 +176,7 @@ private fun AttachmentsPreviewBottomActions(
         modifier = modifier,
         state = state.textEditorState,
         voiceMessageState = VoiceMessageState.Idle,
-        composerMode = MessageComposerMode.Caption,
+        composerMode = MessageComposerMode.Attachment(state.allowCaption),
         onRequestFocus = {},
         onSendMessage = onSendClick,
         showTextFormatting = false,

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/messagecomposer/MessageComposerPresenter.kt

@@ -436,7 +436,7 @@ class MessageComposerPresenter @Inject constructor(
         // Reset composer right away
         resetComposer(markdownTextEditorState, richTextEditorState, fromEdit = capturedMode is MessageComposerMode.Edit)
         when (capturedMode) {
-            is MessageComposerMode.Caption,
+            is MessageComposerMode.Attachment,
             is MessageComposerMode.Normal -> room.sendMessage(
                 body = message.markdown,
                 htmlBody = message.html,
@@ -606,7 +606,7 @@ class MessageComposerPresenter @Inject constructor(
     ): ComposerDraft? {
         val message = currentComposerMessage(markdownTextEditorState, richTextEditorState, withMentions = false)
         val draftType = when (val mode = messageComposerContext.composerMode) {
-            is MessageComposerMode.Caption,
+            is MessageComposerMode.Attachment,
             is MessageComposerMode.Normal -> ComposerDraftType.NewMessage
             is MessageComposerMode.Edit -> {
                 mode.eventOrTransactionId.eventId?.let { eventId -> ComposerDraftType.Edit(eventId) }

libraries/textcomposer/impl/src/main/kotlin/io/element/android/libraries/textcomposer/TextComposer.kt

@@ -72,6 +72,7 @@ import io.element.android.wysiwyg.compose.RichTextEditorState
 import io.element.android.wysiwyg.display.TextDisplay
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.persistentListOf
+import kotlinx.collections.immutable.toPersistentList
 import uniffi.wysiwyg_composer.MenuAction
 import kotlin.time.Duration.Companion.seconds
 
@@ -125,7 +126,7 @@ fun TextComposer(
 
     val composerOptionsButton: @Composable () -> Unit = remember {
         @Composable {
-            if (composerMode == MessageComposerMode.Caption) {
+            if (composerMode is MessageComposerMode.Attachment) {
                 Spacer(modifier = Modifier.width(9.dp))
             } else {
                 ComposerOptionsButton(
@@ -139,12 +140,17 @@ fun TextComposer(
 
     val placeholder = if (composerMode.inThread) {
         stringResource(id = CommonStrings.action_reply_in_thread)
-    } else if (composerMode == MessageComposerMode.Caption) {
+    } else if (composerMode is MessageComposerMode.Attachment) {
         stringResource(id = R.string.rich_text_editor_composer_caption_placeholder)
     } else {
         stringResource(id = R.string.rich_text_editor_composer_placeholder)
     }
-    val textInput: @Composable () -> Unit = when (state) {
+    val textInput: @Composable () -> Unit = if ((composerMode as? MessageComposerMode.Attachment)?.allowCaption == false) {
+        {
+            // No text input when in attachment mode and caption not allowed.
+        }
+    } else {
+        when (state) {
             is TextEditorState.Rich -> {
                 remember(state.richTextEditorState, subcomposing, composerMode, onResetComposerMode, onError) {
                     @Composable {
@@ -185,8 +191,9 @@ fun TextComposer(
                 }
             }
         }
+    }
 
-    val canSendMessage = markdown.isNotBlank() || composerMode == MessageComposerMode.Caption
+    val canSendMessage = markdown.isNotBlank() || composerMode is MessageComposerMode.Attachment
     val sendButton = @Composable {
         SendButton(
             canSendMessage = canSendMessage,
@@ -525,7 +532,7 @@ private fun aTextEditorStateRichList() = persistentListOf(
 internal fun TextComposerSimplePreview() = ElementPreview {
     PreviewColumn(
         items = aTextEditorStateMarkdownList()
-    ) { textEditorState ->
+    ) { _, textEditorState ->
         ATextComposer(
             state = textEditorState,
             voiceMessageState = VoiceMessageState.Idle,
@@ -540,7 +547,7 @@ internal fun TextComposerSimplePreview() = ElementPreview {
 internal fun TextComposerFormattingPreview() = ElementPreview {
     PreviewColumn(
         items = aTextEditorStateRichList()
-    ) { textEditorState ->
+    ) { _, textEditorState ->
         ATextComposer(
             state = textEditorState,
             voiceMessageState = VoiceMessageState.Idle,
@@ -556,7 +563,7 @@ internal fun TextComposerFormattingPreview() = ElementPreview {
 internal fun TextComposerEditPreview() = ElementPreview {
     PreviewColumn(
         items = aTextEditorStateRichList()
-    ) { textEditorState ->
+    ) { _, textEditorState ->
         ATextComposer(
             state = textEditorState,
             voiceMessageState = VoiceMessageState.Idle,
@@ -571,7 +578,7 @@ internal fun TextComposerEditPreview() = ElementPreview {
 internal fun MarkdownTextComposerEditPreview() = ElementPreview {
     PreviewColumn(
         items = aTextEditorStateMarkdownList()
-    ) { textEditorState ->
+    ) { _, textEditorState ->
         ATextComposer(
             state = textEditorState,
             voiceMessageState = VoiceMessageState.Idle,
@@ -586,7 +593,7 @@ internal fun MarkdownTextComposerEditPreview() = ElementPreview {
 internal fun TextComposerReplyPreview(@PreviewParameter(InReplyToDetailsProvider::class) inReplyToDetails: InReplyToDetails) = ElementPreview {
     PreviewColumn(
         items = aTextEditorStateRichList()
-    ) { textEditorState ->
+    ) { _, textEditorState ->
         ATextComposer(
             state = textEditorState,
             voiceMessageState = VoiceMessageState.Idle,
@@ -601,13 +608,14 @@ internal fun TextComposerReplyPreview(@PreviewParameter(InReplyToDetailsProvider
 @PreviewsDayNight
 @Composable
 internal fun TextComposerCaptionPreview() = ElementPreview {
+    val list = aTextEditorStateMarkdownList()
     PreviewColumn(
-        items = aTextEditorStateMarkdownList()
+        items = (list + aTextEditorStateMarkdown(initialText = "NO_CAPTION", initialFocus = true)).toPersistentList()
-    ) { textEditorState ->
+    ) { index, textEditorState ->
         ATextComposer(
             state = textEditorState,
             voiceMessageState = VoiceMessageState.Idle,
-            composerMode = MessageComposerMode.Caption,
+            composerMode = MessageComposerMode.Attachment(allowCaption = index < list.size),
             enableVoiceMessages = false,
         )
     }
@@ -644,7 +652,7 @@ internal fun TextComposerVoicePreview() = ElementPreview {
                 playbackProgress = 0.0f
             ),
         )
-    ) { voiceMessageState ->
+    ) { _, voiceMessageState ->
         ATextComposer(
             state = aTextEditorStateRich(initialFocus = true),
             voiceMessageState = voiceMessageState,
@@ -657,14 +665,14 @@ internal fun TextComposerVoicePreview() = ElementPreview {
 @Composable
 private fun <T> PreviewColumn(
     items: ImmutableList<T>,
-    view: @Composable (T) -> Unit,
+    view: @Composable (Int, T) -> Unit,
 ) {
     Column {
-        items.forEach { item ->
+        items.forEachIndexed { index, item ->
             Box(
                 modifier = Modifier.height(IntrinsicSize.Min)
             ) {
-                view(item)
+                view(index, item)
             }
         }
     }

libraries/textcomposer/impl/src/main/kotlin/io/element/android/libraries/textcomposer/model/MessageComposerMode.kt

@@ -18,7 +18,7 @@ import io.element.android.libraries.matrix.ui.messages.reply.eventId
 sealed interface MessageComposerMode {
     data object Normal : MessageComposerMode
 
-    data object Caption : MessageComposerMode
+    data class Attachment(val allowCaption: Boolean) : MessageComposerMode
 
     sealed interface Special : MessageComposerMode
 
@@ -37,7 +37,7 @@ sealed interface MessageComposerMode {
     val relatedEventId: EventId?
         get() = when (this) {
             is Normal,
-            is Caption -> null
+            is Attachment -> null
             is Edit -> eventOrTransactionId.eventId
             is Reply -> eventId
         }