Merge pull request #4414 from element-hq/feature/bma/openTxtDocument

Open txt document inside the application

features/viewfolder/api/build.gradle.kts

@@ -5,7 +5,7 @@
  * Please see LICENSE files in the repository root for full details.
  */
 plugins {
-    id("io.element.android-library")
+    id("io.element.android-compose-library")
 }
 
 android {

features/viewfolder/api/src/main/kotlin/io/element/android/features/viewfolder/api/TextFileViewer.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.api
+
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import kotlinx.collections.immutable.ImmutableList
+
+fun interface TextFileViewer {
+    @Composable
+    fun Render(
+        lines: ImmutableList<String>,
+        modifier: Modifier,
+    )
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/DefaultTextFileViewer.kt

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl
+
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import com.squareup.anvil.annotations.ContributesBinding
+import io.element.android.features.viewfolder.api.TextFileViewer
+import io.element.android.features.viewfolder.impl.file.ColorationMode
+import io.element.android.features.viewfolder.impl.file.FileContent
+import io.element.android.libraries.di.AppScope
+import kotlinx.collections.immutable.ImmutableList
+import javax.inject.Inject
+
+@ContributesBinding(AppScope::class)
+class DefaultTextFileViewer @Inject constructor() : TextFileViewer {
+    @Composable
+    override fun Render(
+        lines: ImmutableList<String>,
+        modifier: Modifier
+    ) {
+        FileContent(
+            lines = lines,
+            colorationMode = ColorationMode.None,
+            modifier = modifier
+        )
+    }
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/file/FileContent.kt

@@ -0,0 +1,152 @@
+/*
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.file
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.widthIn
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.drawWithContent
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import io.element.android.compound.theme.ElementTheme
+import io.element.android.libraries.androidutils.system.copyToClipboard
+import io.element.android.libraries.designsystem.theme.components.Text
+import io.element.android.libraries.ui.strings.CommonStrings
+import kotlinx.collections.immutable.ImmutableList
+
+@Composable
+internal fun FileContent(
+    lines: ImmutableList<String>,
+    colorationMode: ColorationMode,
+    modifier: Modifier = Modifier,
+) {
+    LazyColumn(
+        modifier = modifier
+    ) {
+        if (lines.isEmpty()) {
+            item {
+                Spacer(Modifier.size(80.dp))
+                Text(
+                    text = stringResource(CommonStrings.common_empty_file),
+                    textAlign = TextAlign.Center,
+                    color = MaterialTheme.colorScheme.tertiary,
+                    modifier = Modifier.fillMaxWidth()
+                )
+            }
+        } else {
+            itemsIndexed(
+                items = lines,
+            ) { index, line ->
+                LineRow(
+                    lineNumber = index + 1,
+                    line = line,
+                    colorationMode = colorationMode,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun LineRow(
+    lineNumber: Int,
+    line: String,
+    colorationMode: ColorationMode,
+) {
+    val context = LocalContext.current
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable(onClick = {
+                context.copyToClipboard(
+                    text = line,
+                    toastMessage = context.getString(CommonStrings.common_line_copied_to_clipboard),
+                )
+            })
+    ) {
+        Text(
+            modifier = Modifier
+                .widthIn(min = 36.dp)
+                .padding(horizontal = 4.dp),
+            text = "$lineNumber",
+            textAlign = TextAlign.End,
+            color = ElementTheme.colors.textSecondary,
+            style = ElementTheme.typography.fontBodyMdMedium,
+        )
+        val color = ElementTheme.colors.textSecondary
+        val width = 0.5.dp.value
+        Text(
+            modifier = Modifier
+                .weight(1f)
+                .drawWithContent {
+                    // Using .height(IntrinsicSize.Min) on the Row does not work well inside LazyColumn
+                    drawLine(
+                        color = color,
+                        start = Offset(0f, 0f),
+                        end = Offset(0f, size.height),
+                        strokeWidth = width
+                    )
+                    drawContent()
+                }
+                .padding(horizontal = 4.dp),
+            text = line,
+            color = line.toColor(colorationMode),
+            style = ElementTheme.typography.fontBodyMdRegular
+        )
+    }
+}
+
+/**
+ * Convert a line to a color.
+ * Ex for logcat:
+ * `01-23 13:14:50.740 25818 25818 D org.matrix.rust.sdk: elementx: SyncIndicator = Hide | RustRoomListService.kt:81`
+ *                                 ^ use this char to determine the color
+ * Ex for Rust logs:
+ * `2024-01-26T10:22:26.947416Z  WARN elementx: Restore with non-empty map | MatrixClientsHolder.kt:68`
+ *                                  ^ use this char to determine the color, see [LogLevel]
+ */
+@Composable
+private fun String.toColor(colorationMode: ColorationMode): Color {
+    return when (colorationMode) {
+        ColorationMode.Logcat -> when (getOrNull(31)) {
+            'D' -> colorDebug
+            'I' -> colorInfo
+            'W' -> colorWarning
+            'E' -> colorError
+            'A' -> colorError
+            else -> ElementTheme.colors.textPrimary
+        }
+        ColorationMode.RustLogs -> when (getOrNull(32)) {
+            'E' -> ElementTheme.colors.textPrimary
+            'G' -> colorDebug
+            'O' -> colorInfo
+            'N' -> colorWarning
+            'R' -> colorError
+            else -> ElementTheme.colors.textPrimary
+        }
+        ColorationMode.None -> ElementTheme.colors.textPrimary
+    }
+}
+
+private val colorDebug = Color(0xFF299999)
+private val colorInfo = Color(0xFFABC023)
+private val colorWarning = Color(0xFFBBB529)
+private val colorError = Color(0xFFFF6B68)

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/file/ViewFileView.kt

@@ -7,32 +7,16 @@
 
 package io.element.android.features.viewfolder.impl.file
 
-import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.consumeWindowInsets
-import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.layout.widthIn
-import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.draw.drawWithContent
-import androidx.compose.ui.geometry.Offset
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.PreviewParameter
-import androidx.compose.ui.unit.dp
 import io.element.android.compound.theme.ElementTheme
 import io.element.android.compound.tokens.generated.CompoundIcons
-import io.element.android.libraries.androidutils.system.copyToClipboard
 import io.element.android.libraries.architecture.AsyncData
 import io.element.android.libraries.designsystem.components.async.AsyncFailure
 import io.element.android.libraries.designsystem.components.async.AsyncLoading
@@ -46,7 +30,6 @@ import io.element.android.libraries.designsystem.theme.components.Scaffold
 import io.element.android.libraries.designsystem.theme.components.Text
 import io.element.android.libraries.designsystem.theme.components.TopAppBar
 import io.element.android.libraries.ui.strings.CommonStrings
-import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.toImmutableList
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -114,125 +97,6 @@ fun ViewFileView(
     )
 }
 
-@Composable
-private fun FileContent(
-    lines: ImmutableList<String>,
-    colorationMode: ColorationMode,
-    modifier: Modifier = Modifier,
-) {
-    LazyColumn(
-        modifier = modifier
-    ) {
-        if (lines.isEmpty()) {
-            item {
-                Spacer(Modifier.size(80.dp))
-                Text(
-                    text = "Empty file",
-                    textAlign = TextAlign.Center,
-                    color = MaterialTheme.colorScheme.tertiary,
-                    modifier = Modifier.fillMaxWidth()
-                )
-            }
-        } else {
-            itemsIndexed(
-                items = lines,
-            ) { index, line ->
-                LineRow(
-                    lineNumber = index + 1,
-                    line = line,
-                    colorationMode = colorationMode,
-                )
-            }
-        }
-    }
-}
-
-@Composable
-private fun LineRow(
-    lineNumber: Int,
-    line: String,
-    colorationMode: ColorationMode,
-) {
-    val context = LocalContext.current
-    Row(
-        modifier = Modifier
-            .fillMaxWidth()
-            .clickable(onClick = {
-                context.copyToClipboard(
-                    line,
-                    "Line copied to clipboard",
-                )
-            })
-    ) {
-        Text(
-            modifier = Modifier
-                .widthIn(min = 36.dp)
-                .padding(horizontal = 4.dp),
-            text = "$lineNumber",
-            textAlign = TextAlign.End,
-            color = ElementTheme.colors.textSecondary,
-            style = ElementTheme.typography.fontBodyMdMedium,
-        )
-        val color = ElementTheme.colors.textSecondary
-        val width = 0.5.dp.value
-        Text(
-            modifier = Modifier
-                .weight(1f)
-                .drawWithContent {
-                    // Using .height(IntrinsicSize.Min) on the Row does not work well inside LazyColumn
-                    drawLine(
-                        color = color,
-                        start = Offset(0f, 0f),
-                        end = Offset(0f, size.height),
-                        strokeWidth = width
-                    )
-                    drawContent()
-                }
-                .padding(horizontal = 4.dp),
-            text = line,
-            color = line.toColor(colorationMode),
-            style = ElementTheme.typography.fontBodyMdRegular
-        )
-    }
-}
-
-/**
- * Convert a line to a color.
- * Ex for logcat:
- * `01-23 13:14:50.740 25818 25818 D org.matrix.rust.sdk: elementx: SyncIndicator = Hide | RustRoomListService.kt:81`
- *                                 ^ use this char to determine the color
- * Ex for Rust logs:
- * `2024-01-26T10:22:26.947416Z  WARN elementx: Restore with non-empty map | MatrixClientsHolder.kt:68`
- *                                  ^ use this char to determine the color, see [LogLevel]
- */
-@Composable
-private fun String.toColor(colorationMode: ColorationMode): Color {
-    return when (colorationMode) {
-        ColorationMode.Logcat -> when (getOrNull(31)) {
-            'D' -> colorDebug
-            'I' -> colorInfo
-            'W' -> colorWarning
-            'E' -> colorError
-            'A' -> colorError
-            else -> ElementTheme.colors.textPrimary
-        }
-        ColorationMode.RustLogs -> when (getOrNull(32)) {
-            'E' -> ElementTheme.colors.textPrimary
-            'G' -> colorDebug
-            'O' -> colorInfo
-            'N' -> colorWarning
-            'R' -> colorError
-            else -> ElementTheme.colors.textPrimary
-        }
-        ColorationMode.None -> ElementTheme.colors.textPrimary
-    }
-}
-
-private val colorDebug = Color(0xFF299999)
-private val colorInfo = Color(0xFFABC023)
-private val colorWarning = Color(0xFFBBB529)
-private val colorError = Color(0xFFFF6B68)
-
 @PreviewsDayNight
 @Composable
 internal fun ViewFileViewPreview(@PreviewParameter(ViewFileStateProvider::class) state: ViewFileState) = ElementPreview {

libraries/mediaviewer/api/src/main/kotlin/io/element/android/libraries/mediaviewer/api/MediaInfo.kt

@@ -156,3 +156,24 @@ fun aVoiceMediaInfo(
     waveform = waveForm,
     duration = duration,
 )
+
+fun aTxtMediaInfo(
+    filename: String = "a text file.txt",
+    caption: String? = null,
+    senderName: String? = null,
+    dateSent: String? = null,
+    dateSentFull: String? = null,
+): MediaInfo = MediaInfo(
+    filename = filename,
+    caption = caption,
+    mimeType = MimeTypes.PlainText,
+    formattedFileSize = "2kB",
+    fileExtension = "txt",
+    senderId = UserId("@alice:server.org"),
+    senderName = senderName,
+    senderAvatar = null,
+    dateSent = dateSent,
+    dateSentFull = dateSentFull,
+    waveform = null,
+    duration = null,
+)

libraries/mediaviewer/impl/build.gradle.kts

@@ -33,6 +33,7 @@ dependencies {
     implementation(libs.vanniktech.blurhash)
     implementation(libs.telephoto.flick)
 
+    implementation(projects.features.viewfolder.api)
     implementation(projects.libraries.androidutils)
     implementation(projects.libraries.architecture)
     implementation(projects.libraries.core)

libraries/mediaviewer/impl/src/main/kotlin/io/element/android/libraries/mediaviewer/impl/local/DefaultLocalMediaRenderer.kt

@@ -11,6 +11,7 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import com.squareup.anvil.annotations.ContributesBinding
+import io.element.android.features.viewfolder.api.TextFileViewer
 import io.element.android.libraries.di.AppScope
 import io.element.android.libraries.mediaviewer.api.local.LocalMedia
 import io.element.android.libraries.mediaviewer.api.local.LocalMediaRenderer
@@ -20,7 +21,9 @@ import me.saket.telephoto.zoomable.rememberZoomableState
 import javax.inject.Inject
 
 @ContributesBinding(AppScope::class)
-class DefaultLocalMediaRenderer @Inject constructor() : LocalMediaRenderer {
+class DefaultLocalMediaRenderer @Inject constructor(
+    private val textFileViewer: TextFileViewer,
+) : LocalMediaRenderer {
     @Composable
     override fun Render(localMedia: LocalMedia) {
         val localMediaViewState = rememberLocalMediaViewState(
@@ -33,6 +36,7 @@ class DefaultLocalMediaRenderer @Inject constructor() : LocalMediaRenderer {
             bottomPaddingInPixels = 0,
             localMedia = localMedia,
             localMediaViewState = localMediaViewState,
+            textFileViewer = textFileViewer,
             onClick = {}
         )
     }

libraries/mediaviewer/impl/src/main/kotlin/io/element/android/libraries/mediaviewer/impl/local/LocalMediaView.kt

@@ -9,6 +9,7 @@ package io.element.android.libraries.mediaviewer.impl.local
 
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
+import io.element.android.features.viewfolder.api.TextFileViewer
 import io.element.android.libraries.core.mimetype.MimeTypes
 import io.element.android.libraries.core.mimetype.MimeTypes.isMimeTypeAudio
 import io.element.android.libraries.core.mimetype.MimeTypes.isMimeTypeImage
@@ -19,6 +20,7 @@ import io.element.android.libraries.mediaviewer.impl.local.audio.MediaAudioView
 import io.element.android.libraries.mediaviewer.impl.local.file.MediaFileView
 import io.element.android.libraries.mediaviewer.impl.local.image.MediaImageView
 import io.element.android.libraries.mediaviewer.impl.local.pdf.MediaPdfView
+import io.element.android.libraries.mediaviewer.impl.local.txt.TextFileView
 import io.element.android.libraries.mediaviewer.impl.local.video.MediaVideoView
 
 @Composable
@@ -26,6 +28,7 @@ fun LocalMediaView(
     localMedia: LocalMedia?,
     bottomPaddingInPixels: Int,
     onClick: () -> Unit,
+    textFileViewer: TextFileViewer,
     modifier: Modifier = Modifier,
     isDisplayed: Boolean = true,
     localMediaViewState: LocalMediaViewState = rememberLocalMediaViewState(),
@@ -46,6 +49,11 @@ fun LocalMediaView(
             localMedia = localMedia,
             modifier = modifier,
         )
+        mimeType == MimeTypes.PlainText -> TextFileView(
+            localMedia = localMedia,
+            textFileViewer = textFileViewer,
+            modifier = modifier,
+        )
         mimeType == MimeTypes.Pdf -> MediaPdfView(
             localMediaViewState = localMediaViewState,
             localMedia = localMedia,

libraries/mediaviewer/impl/src/main/kotlin/io/element/android/libraries/mediaviewer/impl/local/pdf/PdfViewer.kt

@@ -37,6 +37,7 @@ import io.element.android.libraries.designsystem.preview.PreviewsDayNight
 import io.element.android.libraries.designsystem.text.roundToPx
 import io.element.android.libraries.designsystem.text.toDp
 import io.element.android.libraries.designsystem.theme.components.Text
+import io.element.android.libraries.mediaviewer.impl.viewer.topAppBarHeight
 import io.element.android.libraries.ui.strings.CommonStrings
 import kotlinx.collections.immutable.ImmutableList
 import me.saket.telephoto.zoomable.zoomable
@@ -126,7 +127,7 @@ private fun PdfPagesContentView(
     ) {
         // Add a fake item to the top so that the first item is not at the top of the screen.
         item {
-            Spacer(modifier = Modifier.height(80.dp))
+            Spacer(modifier = Modifier.height(topAppBarHeight))
         }
         items(pdfPages.size) { index ->
             val pdfPage = pdfPages[index]

libraries/mediaviewer/impl/src/main/kotlin/io/element/android/libraries/mediaviewer/impl/local/txt/TextFileContentProvider.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.libraries.mediaviewer.impl.local.txt
+
+import androidx.compose.ui.tooling.preview.PreviewParameterProvider
+import io.element.android.libraries.architecture.AsyncData
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.persistentListOf
+
+open class TextFileContentProvider : PreviewParameterProvider<AsyncData<ImmutableList<String>>> {
+    override val values: Sequence<AsyncData<ImmutableList<String>>>
+        get() = sequenceOf(
+            AsyncData.Uninitialized,
+            AsyncData.Loading(),
+            AsyncData.Success(persistentListOf("Hello, World!")),
+            AsyncData.Failure(Exception("Failed to load text")),
+        )
+}

libraries/mediaviewer/impl/src/main/kotlin/io/element/android/libraries/mediaviewer/impl/local/txt/TextFileView.kt

@@ -0,0 +1,110 @@
+/*
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.libraries.mediaviewer.impl.local.txt
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.PreviewParameter
+import io.element.android.features.viewfolder.api.TextFileViewer
+import io.element.android.libraries.architecture.AsyncData
+import io.element.android.libraries.designsystem.preview.ElementPreview
+import io.element.android.libraries.designsystem.preview.PreviewsDayNight
+import io.element.android.libraries.designsystem.theme.components.CircularProgressIndicator
+import io.element.android.libraries.designsystem.theme.components.Text
+import io.element.android.libraries.mediaviewer.api.local.LocalMedia
+import io.element.android.libraries.mediaviewer.impl.viewer.topAppBarHeight
+import io.element.android.libraries.ui.strings.CommonStrings
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.toImmutableList
+
+@Composable
+fun TextFileView(
+    localMedia: LocalMedia?,
+    textFileViewer: TextFileViewer,
+    modifier: Modifier = Modifier,
+) {
+    val data = remember { mutableStateOf<AsyncData<ImmutableList<String>>>(AsyncData.Uninitialized) }
+    val context = LocalContext.current
+    LaunchedEffect(localMedia?.uri) {
+        data.value = AsyncData.Loading()
+        if (localMedia?.uri != null) {
+            // Load the file content
+            val result = runCatching {
+                context.contentResolver.openInputStream(localMedia.uri).use {
+                    it?.bufferedReader()?.readLines()?.toList().orEmpty()
+                }
+            }
+            data.value = if (result.isSuccess) {
+                AsyncData.Success(result.getOrNull().orEmpty().toImmutableList())
+            } else {
+                AsyncData.Failure(result.exceptionOrNull() ?: Exception("An error occurred"))
+            }
+        }
+    }
+    TextFileContentView(
+        data = data.value,
+        textFileViewer = textFileViewer,
+        modifier = modifier,
+    )
+}
+
+@Composable
+private fun TextFileContentView(
+    data: AsyncData<ImmutableList<String>>,
+    textFileViewer: TextFileViewer,
+    modifier: Modifier = Modifier,
+) {
+    when (data) {
+        AsyncData.Uninitialized,
+        is AsyncData.Loading -> Box(
+            modifier = modifier.fillMaxSize(),
+            contentAlignment = Alignment.Center
+        ) {
+            CircularProgressIndicator()
+        }
+        is AsyncData.Failure -> Box(
+            modifier = modifier.fillMaxSize(),
+            contentAlignment = Alignment.Center
+        ) {
+            Text(text = data.error.message ?: stringResource(id = CommonStrings.error_unknown))
+        }
+        is AsyncData.Success -> {
+            textFileViewer.Render(
+                lines = data.data,
+                modifier = modifier
+                    .fillMaxSize()
+                    .padding(top = topAppBarHeight),
+            )
+        }
+    }
+}
+
+@PreviewsDayNight
+@Composable
+internal fun TextFileContentViewPreview(
+    @PreviewParameter(TextFileContentProvider::class) text: AsyncData<ImmutableList<String>>,
+) = ElementPreview {
+    TextFileContentView(
+        data = text,
+        textFileViewer = { lines, modifier ->
+            Text(
+                modifier = modifier,
+                text = lines.firstOrNull() ?: "File content"
+            )
+        }
+    )
+}

libraries/mediaviewer/impl/src/main/kotlin/io/element/android/libraries/mediaviewer/impl/viewer/MediaViewerNode.kt

@@ -17,6 +17,7 @@ import dagger.assisted.Assisted
 import dagger.assisted.AssistedInject
 import io.element.android.anvilannotations.ContributesNode
 import io.element.android.compound.theme.ForcedDarkElementTheme
+import io.element.android.features.viewfolder.api.TextFileViewer
 import io.element.android.libraries.architecture.inputs
 import io.element.android.libraries.core.coroutine.CoroutineDispatchers
 import io.element.android.libraries.di.RoomScope
@@ -42,6 +43,7 @@ class MediaViewerNode @AssistedInject constructor(
     coroutineDispatchers: CoroutineDispatchers,
     systemClock: SystemClock,
     pagerKeysHandler: PagerKeysHandler,
+    private val textFileViewer: TextFileViewer,
 ) : Node(buildContext, plugins = plugins),
     MediaViewerNavigator {
     private val inputs = inputs<MediaViewerEntryPoint.Params>()
@@ -125,6 +127,7 @@ class MediaViewerNode @AssistedInject constructor(
             val state = presenter.present()
             MediaViewerView(
                 state = state,
+                textFileViewer = textFileViewer,
                 modifier = modifier,
                 onBackClick = ::onDone
             )

libraries/mediaviewer/impl/src/main/kotlin/io/element/android/libraries/mediaviewer/impl/viewer/MediaViewerStateProvider.kt

@@ -16,6 +16,7 @@ import io.element.android.libraries.matrix.api.media.MediaSource
 import io.element.android.libraries.matrix.api.timeline.Timeline
 import io.element.android.libraries.mediaviewer.api.MediaInfo
 import io.element.android.libraries.mediaviewer.api.aPdfMediaInfo
+import io.element.android.libraries.mediaviewer.api.aTxtMediaInfo
 import io.element.android.libraries.mediaviewer.api.aVideoMediaInfo
 import io.element.android.libraries.mediaviewer.api.anApkMediaInfo
 import io.element.android.libraries.mediaviewer.api.anAudioMediaInfo
@@ -159,6 +160,14 @@ open class MediaViewerStateProvider : PreviewParameterProvider<MediaViewerState>
                     MediaViewerPageData.Failure(Exception("error"))
                 ),
             ),
+            aMediaViewerState(
+                listOf(
+                    aMediaViewerPageData(
+                        downloadedMedia = AsyncData.Loading(),
+                        mediaInfo = aTxtMediaInfo(),
+                    )
+                )
+            ),
         )
 }
 

libraries/mediaviewer/impl/src/main/kotlin/io/element/android/libraries/mediaviewer/impl/viewer/MediaViewerView.kt

@@ -49,6 +49,7 @@ import androidx.compose.ui.unit.dp
 import coil3.compose.AsyncImage
 import io.element.android.compound.theme.ElementTheme
 import io.element.android.compound.tokens.generated.CompoundIcons
+import io.element.android.features.viewfolder.api.TextFileViewer
 import io.element.android.libraries.architecture.AsyncData
 import io.element.android.libraries.core.mimetype.MimeTypes
 import io.element.android.libraries.core.mimetype.MimeTypes.isMimeTypeVideo
@@ -83,9 +84,12 @@ import me.saket.telephoto.zoomable.OverzoomEffect
 import me.saket.telephoto.zoomable.ZoomSpec
 import me.saket.telephoto.zoomable.rememberZoomableState
 
+val topAppBarHeight = 88.dp
+
 @Composable
 fun MediaViewerView(
     state: MediaViewerState,
+    textFileViewer: TextFileViewer,
     onBackClick: () -> Unit,
     modifier: Modifier = Modifier,
 ) {
@@ -143,6 +147,7 @@ fun MediaViewerView(
                             showOverlay = showOverlay,
                             bottomPaddingInPixels = bottomPaddingInPixels,
                             data = dataForPage,
+                            textFileViewer = textFileViewer,
                             onDismiss = onBackClick,
                             onRetry = {
                                 state.eventSink(MediaViewerEvents.LoadMedia(dataForPage))
@@ -267,6 +272,7 @@ private fun MediaViewerPage(
     showOverlay: Boolean,
     bottomPaddingInPixels: Int,
     data: MediaViewerPageData.MediaViewerData,
+    textFileViewer: TextFileViewer,
     onDismiss: () -> Unit,
     onRetry: () -> Unit,
     onDismissError: () -> Unit,
@@ -316,6 +322,7 @@ private fun MediaViewerPage(
                     localMediaViewState = localMediaViewState,
                     localMedia = downloadedMedia.dataOrNull(),
                     mediaInfo = data.mediaInfo,
+                    textFileViewer = textFileViewer,
                     onClick = {
                         if (playableState is PlayableState.NotPlayable) {
                             currentOnShowOverlayChange(!currentShowOverlay)
@@ -563,6 +570,7 @@ private fun ErrorView(
 internal fun MediaViewerViewPreview(@PreviewParameter(MediaViewerStateProvider::class) state: MediaViewerState) = ElementPreviewDark {
     MediaViewerView(
         state = state,
+        textFileViewer = { _, _ -> },
         onBackClick = {}
     )
 }

libraries/mediaviewer/impl/src/test/kotlin/io/element/android/libraries/mediaviewer/impl/viewer/MediaViewerViewTest.kt

@@ -252,6 +252,7 @@ private fun <R : TestRule> AndroidComposeTestRule<R, ComponentActivity>.setMedia
     setContent {
         MediaViewerView(
             state = state,
+            textFileViewer = { _, _ -> },
             onBackClick = onBackClick,
         )
     }

libraries/ui-strings/src/main/res/values/localazy.xml

@@ -160,6 +160,7 @@
   <string name="common_editing">"Editing"</string>
   <string name="common_editing_caption">"Editing caption"</string>
   <string name="common_emote">"* %1$s %2$s"</string>
+  <string name="common_empty_file">"Empty file"</string>
   <string name="common_encryption">"Encryption"</string>
   <string name="common_encryption_enabled">"Encryption enabled"</string>
   <string name="common_enter_your_pin">"Enter your PIN"</string>
@@ -184,6 +185,7 @@ Reason: %1$s."</string>
   <string name="common_invite_unknown_profile">"This Matrix ID can\'t be found, so the invite might not be received."</string>
   <string name="common_leaving_room">"Leaving room"</string>
   <string name="common_light">"Light"</string>
+  <string name="common_line_copied_to_clipboard">"Line copied to clipboard"</string>
   <string name="common_link_copied_to_clipboard">"Link copied to clipboard"</string>
   <string name="common_loading">"Loading…"</string>
   <string name="common_loading_more">"Loading more…"</string>

tests/konsist/src/test/kotlin/io/element/android/tests/konsist/KonsistClassNameTest.kt

@@ -51,6 +51,7 @@ class KonsistClassNameTest {
             .withoutName(
                 "AspectRatioProvider",
                 "OverlapRatioProvider",
+                "TextFileContentProvider",
             )
             .also {
                 // Check that classes are actually found