refactor(feeds): unify content warning behind ContentWarningGate

Collapse the per-media, per-blurhash and grid-of-blurhash variants into a
single ContentWarningGate that takes a backdrop slot and a sizing
modifier. Callers choose the backdrop (single blurhash, grid of
blurhashes, or none).

Remove the isSensitive field from MediaUrl{Image,Video}; it was a
rendering concern leaked into a media model. Sensitivity is now only
expressed to the gate. Picture/Video feeds and their display variants
compute isSensitive + reasons themselves and wrap with the gate.

ZoomableContentView keeps a default internal gate (fires when
content.contentWarning != null) so the 14 callers that don't need
grid-level handling still get the blurhash overlay automatically.

Also rename collectPictureReasons to collectContentWarningReasons.

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/SensitivityWarning.kt

@@ -117,15 +117,13 @@ fun SensitivityWarning(
 }
 
 @Composable
-fun SensitivityWarningOverBlurhash(
+fun ContentWarningGate(
     isSensitive: Boolean,
     reasons: Set<String>,
-    blurhash: String?,
-    ratio: Float?,
-    description: String?,
-    contentScale: ContentScale,
-    preloadUrl: String?,
+    preloadUrls: List<String>,
     accountViewModel: AccountViewModel,
+    modifier: Modifier = Modifier.fillMaxWidth(),
+    backdrop: (@Composable () -> Unit)? = null,
     content: @Composable () -> Unit,
 ) {
     if (!isSensitive) {
@@ -137,51 +135,12 @@ fun SensitivityWarningOverBlurhash(
 
     var showContentWarningNote by remember(accountState) { mutableStateOf(accountState.value != true) }
 
-    if (showContentWarningNote && preloadUrl != null) {
+    if (showContentWarningNote && preloadUrls.isNotEmpty()) {
         val context = LocalContext.current
-        LaunchedEffect(preloadUrl) {
-            runCatching {
-                context.imageLoader.enqueue(ImageRequest.Builder(context).data(preloadUrl).build())
-            }
-        }
-    }
-
-    CrossfadeIfEnabled(targetState = showContentWarningNote, accountViewModel = accountViewModel) {
-        if (it) {
-            if (blurhash != null) {
-                ContentWarningOverBlurhash(reasons, blurhash, ratio, description, contentScale) { showContentWarningNote = false }
-            } else {
-                ContentWarningNote(reasons.firstOrNull()) { showContentWarningNote = false }
-            }
-        } else {
-            content()
-        }
-    }
-}
-
-@Composable
-fun SensitivityWarningOverBlurhashGrid(
-    isSensitive: Boolean,
-    reasons: Set<String>,
-    media: List<MediaUrlImage>,
-    accountViewModel: AccountViewModel,
-    content: @Composable () -> Unit,
-) {
-    if (!isSensitive || media.isEmpty()) {
-        content()
-        return
-    }
-
-    val accountState = accountViewModel.showSensitiveContent().collectAsStateWithLifecycle()
-
-    var showContentWarningNote by remember(accountState) { mutableStateOf(accountState.value != true) }
-
-    if (showContentWarningNote) {
-        val context = LocalContext.current
-        LaunchedEffect(media) {
-            media.forEach { item ->
+        LaunchedEffect(preloadUrls) {
+            preloadUrls.forEach { url ->
                 runCatching {
-                    context.imageLoader.enqueue(ImageRequest.Builder(context).data(item.url).build())
+                    context.imageLoader.enqueue(ImageRequest.Builder(context).data(url).build())
                 }
             }
         }
@@ -189,7 +148,14 @@ fun SensitivityWarningOverBlurhashGrid(
 
     CrossfadeIfEnabled(targetState = showContentWarningNote, accountViewModel = accountViewModel) {
         if (it) {
-            ContentWarningOverBlurhashGrid(reasons, media) { showContentWarningNote = false }
+            if (backdrop != null) {
+                Box(modifier = modifier.clipToBounds()) {
+                    backdrop()
+                    ContentWarningOverlayBody(reasons) { showContentWarningNote = false }
+                }
+            } else {
+                ContentWarningNote(reasons.firstOrNull()) { showContentWarningNote = false }
+            }
         } else {
             content()
         }
@@ -239,85 +205,44 @@ fun ContentWarningNoteWithBigReasonPreview() {
     }
 }
 
-@Preview
 @Composable
-fun ContentWarningOverBlurhashPreview() {
-    ThemeComparisonColumn {
-        ContentWarningOverBlurhash(
-            reasons = setOf("Spoilers"),
-            blurhash = "LEHV6nWB2yk8pyo0adR*.7kCMdnj",
-            ratio = 16f / 9f,
-            description = null,
-            contentScale = ContentScale.FillWidth,
-            onDismiss = {},
-        )
-    }
-}
-
-@Preview
-@Composable
-fun ContentWarningOverBlurhashMultiReasonPreview() {
-    ThemeComparisonColumn {
-        ContentWarningOverBlurhash(
-            reasons = setOf("Spoilers", "Violence", "Nudity"),
-            blurhash = "LEHV6nWB2yk8pyo0adR*.7kCMdnj",
-            ratio = 16f / 9f,
-            description = null,
-            contentScale = ContentScale.FillWidth,
-            onDismiss = {},
-        )
-    }
-}
-
-@Composable
-fun ContentWarningOverBlurhash(
-    reasons: Set<String>,
+fun BlurhashBackdrop(
     blurhash: String,
-    ratio: Float?,
     description: String?,
-    contentScale: ContentScale,
-    onDismiss: () -> Unit,
 ) {
-    val sizingModifier =
-        when {
-            contentScale == ContentScale.Crop -> Modifier.fillMaxSize()
-            ratio != null -> Modifier.fillMaxWidth().aspectRatio(ratio)
-            else -> Modifier.fillMaxWidth()
-        }
-
-    Box(modifier = sizingModifier.clipToBounds()) {
-        DisplayBlurHash(
-            blurhash = blurhash,
-            description = description,
-            contentScale = ContentScale.Crop,
-            modifier = Modifier.fillMaxSize(),
-        )
-        ContentWarningOverlayBody(reasons, onDismiss)
-    }
+    DisplayBlurHash(
+        blurhash = blurhash,
+        description = description,
+        contentScale = ContentScale.Crop,
+        modifier = Modifier.fillMaxSize(),
+    )
 }
 
 @Composable
-fun ContentWarningOverBlurhashGrid(
-    reasons: Set<String>,
-    media: List<MediaUrlImage>,
-    onDismiss: () -> Unit,
-) {
-    Box(modifier = Modifier.fillMaxWidth().aspectRatio(1f).clipToBounds()) {
-        AutoNonlazyGrid(media.size) { idx ->
-            val item = media[idx]
-            if (item.blurhash != null) {
-                DisplayBlurHash(
-                    blurhash = item.blurhash,
-                    description = item.description,
-                    contentScale = ContentScale.Crop,
-                    modifier = Modifier.fillMaxSize(),
-                )
-            }
+fun BlurhashGridBackdrop(media: List<MediaUrlImage>) {
+    AutoNonlazyGrid(media.size) { idx ->
+        val item = media[idx]
+        if (item.blurhash != null) {
+            DisplayBlurHash(
+                blurhash = item.blurhash,
+                description = item.description,
+                contentScale = ContentScale.Crop,
+                modifier = Modifier.fillMaxSize(),
+            )
         }
-        ContentWarningOverlayBody(reasons, onDismiss)
     }
 }
 
+fun mediaSizingModifier(
+    ratio: Float?,
+    contentScale: ContentScale,
+): Modifier =
+    when {
+        contentScale == ContentScale.Crop -> Modifier.fillMaxSize()
+        ratio != null -> Modifier.fillMaxWidth().aspectRatio(ratio)
+        else -> Modifier.fillMaxWidth()
+    }
+
 @Composable
 private fun ContentWarningOverlayBody(
     reasons: Set<String>,
@@ -487,7 +412,7 @@ fun ContentWarningNote(
     }
 }
 
-fun collectPictureReasons(event: Event): Set<String> {
+fun collectContentWarningReasons(event: Event): Set<String> {
     val reasons = linkedSetOf<String>()
     event.contentWarningReason()?.takeIf { it.isNotBlank() }?.let { reasons.add(it) }
     event.imetas().forEach { iMeta ->

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/ZoomableContentView.kt

@@ -151,15 +151,13 @@ fun ZoomableContentView(
     when (content) {
         is MediaUrlImage -> {
             val ratio = content.dim?.aspectRatio() ?: MediaAspectRatioCache.get(content.url)
-            SensitivityWarningOverBlurhash(
-                isSensitive = content.isSensitive,
+            ContentWarningGate(
+                isSensitive = content.contentWarning != null,
                 reasons = setOfNotNull(content.contentWarning),
-                blurhash = content.blurhash,
-                ratio = ratio,
-                description = content.description,
-                contentScale = contentScale,
-                preloadUrl = content.url,
+                preloadUrls = listOf(content.url),
                 accountViewModel = accountViewModel,
+                modifier = mediaSizingModifier(ratio, contentScale),
+                backdrop = content.blurhash?.let { blurhash -> { BlurhashBackdrop(blurhash, content.description) } },
             ) {
                 TwoSecondController(content) { controllerVisible ->
                     val mainImageModifier =
@@ -175,15 +173,13 @@ fun ZoomableContentView(
 
         is MediaUrlVideo -> {
             val ratio = content.dim?.aspectRatio() ?: MediaAspectRatioCache.get(content.url)
-            SensitivityWarningOverBlurhash(
-                isSensitive = content.isSensitive,
+            ContentWarningGate(
+                isSensitive = content.contentWarning != null,
                 reasons = setOfNotNull(content.contentWarning),
-                blurhash = content.blurhash,
-                ratio = ratio,
-                description = content.description,
-                contentScale = contentScale,
-                preloadUrl = null,
+                preloadUrls = emptyList(),
                 accountViewModel = accountViewModel,
+                modifier = mediaSizingModifier(ratio, contentScale),
+                backdrop = content.blurhash?.let { blurhash -> { BlurhashBackdrop(blurhash, content.description) } },
             ) {
                 Box(
                     modifier = Modifier.fillMaxWidth().then(boundsTrackingModifier),

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/PictureDisplay.kt

@@ -23,6 +23,8 @@ package com.vitorpamplona.amethyst.ui.note.types
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.aspectRatio
+import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
@@ -37,12 +39,16 @@ import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.text.style.TextOverflow
 import com.vitorpamplona.amethyst.commons.model.EmptyTagList
 import com.vitorpamplona.amethyst.commons.richtext.MediaUrlImage
+import com.vitorpamplona.amethyst.model.MediaAspectRatioCache
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.ui.components.AutoNonlazyGrid
-import com.vitorpamplona.amethyst.ui.components.SensitivityWarningOverBlurhashGrid
+import com.vitorpamplona.amethyst.ui.components.BlurhashBackdrop
+import com.vitorpamplona.amethyst.ui.components.BlurhashGridBackdrop
+import com.vitorpamplona.amethyst.ui.components.ContentWarningGate
 import com.vitorpamplona.amethyst.ui.components.TranslatableRichTextViewer
 import com.vitorpamplona.amethyst.ui.components.ZoomableContentView
-import com.vitorpamplona.amethyst.ui.components.collectPictureReasons
+import com.vitorpamplona.amethyst.ui.components.collectContentWarningReasons
+import com.vitorpamplona.amethyst.ui.components.mediaSizingModifier
 import com.vitorpamplona.amethyst.ui.navigation.navs.INav
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.theme.StdVertSpacer
@@ -63,8 +69,7 @@ fun PictureDisplay(
     val event = (note.event as? PictureEvent) ?: return
     val uri = note.toNostrUri()
     val isSensitive = event.isSensitiveOrNSFW()
-    val reasons = collectPictureReasons(event)
-    val inGrid = event.imetaTags().size > 1
+    val reasons = collectContentWarningReasons(event)
 
     val images by
         remember(note) {
@@ -79,8 +84,6 @@ fun PictureDisplay(
                             blurhash = it.blurhash,
                             dim = it.dimension,
                             uri = uri,
-                            contentWarning = reasons.firstOrNull(),
-                            isSensitive = isSensitive && !inGrid,
                             mimeType = it.mimeType,
                         )
                     }.toImmutableList(),
@@ -106,19 +109,31 @@ fun PictureDisplay(
             }
 
             if (images.size == 1) {
-                ZoomableContentView(
-                    content = images.first(),
-                    images = images,
-                    roundedCorner = roundedCorner,
-                    contentScale = ContentScale.FillWidth,
-                    accountViewModel = accountViewModel,
-                )
-            } else {
-                SensitivityWarningOverBlurhashGrid(
+                val ratio = first.dim?.aspectRatio() ?: MediaAspectRatioCache.get(first.url)
+                ContentWarningGate(
                     isSensitive = isSensitive,
                     reasons = reasons,
-                    media = images,
+                    preloadUrls = listOf(first.url),
                     accountViewModel = accountViewModel,
+                    modifier = mediaSizingModifier(ratio, ContentScale.FillWidth),
+                    backdrop = first.blurhash?.let { blurhash -> { BlurhashBackdrop(blurhash, first.description) } },
+                ) {
+                    ZoomableContentView(
+                        content = first,
+                        images = images,
+                        roundedCorner = roundedCorner,
+                        contentScale = ContentScale.FillWidth,
+                        accountViewModel = accountViewModel,
+                    )
+                }
+            } else {
+                ContentWarningGate(
+                    isSensitive = isSensitive,
+                    reasons = reasons,
+                    preloadUrls = images.map { it.url },
+                    accountViewModel = accountViewModel,
+                    modifier = Modifier.fillMaxWidth().aspectRatio(1f),
+                    backdrop = { BlurhashGridBackdrop(images) },
                 ) {
                     AutoNonlazyGrid(images.size) {
                         ZoomableContentView(

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/VideoDisplay.kt

@@ -29,12 +29,16 @@ import com.vitorpamplona.amethyst.commons.richtext.BaseMediaContent
 import com.vitorpamplona.amethyst.commons.richtext.MediaUrlImage
 import com.vitorpamplona.amethyst.commons.richtext.MediaUrlVideo
 import com.vitorpamplona.amethyst.commons.richtext.RichTextParser
+import com.vitorpamplona.amethyst.model.MediaAspectRatioCache
 import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.components.BlurhashBackdrop
+import com.vitorpamplona.amethyst.ui.components.ContentWarningGate
 import com.vitorpamplona.amethyst.ui.components.ZoomableContentView
+import com.vitorpamplona.amethyst.ui.components.collectContentWarningReasons
+import com.vitorpamplona.amethyst.ui.components.mediaSizingModifier
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip31Alts.alt
-import com.vitorpamplona.quartz.nip36SensitiveContent.contentWarningReason
 import com.vitorpamplona.quartz.nip36SensitiveContent.isSensitiveOrNSFW
 import com.vitorpamplona.quartz.nip71Video.VideoEvent
 
@@ -49,13 +53,13 @@ fun JustVideoDisplay(
     val event = (videoEvent as? Event) ?: return
 
     val imeta = videoEvent.imetaTags().getOrNull(0) ?: return
+    val isSensitive = event.isSensitiveOrNSFW()
+    val reasons = collectContentWarningReasons(event)
+    val isImage = imeta.mimeType?.startsWith("image/") == true || RichTextParser.isImageUrl(imeta.url)
 
     val content by
         remember(note) {
             val description = event.content.ifEmpty { null } ?: imeta.alt ?: event.alt()
-            val isImage = imeta.mimeType?.startsWith("image/") == true || RichTextParser.isImageUrl(imeta.url)
-            val isSensitive = event.isSensitiveOrNSFW()
-            val contentWarning = event.contentWarningReason()
 
             mutableStateOf<BaseMediaContent>(
                 if (isImage) {
@@ -66,8 +70,6 @@ fun JustVideoDisplay(
                         blurhash = imeta.blurhash,
                         dim = imeta.dimension,
                         uri = note.toNostrUri(),
-                        contentWarning = contentWarning,
-                        isSensitive = isSensitive,
                         mimeType = imeta.mimeType,
                     )
                 } else {
@@ -79,18 +81,27 @@ fun JustVideoDisplay(
                         dim = imeta.dimension,
                         uri = note.toNostrUri(),
                         authorName = note.author?.toBestDisplayName(),
-                        contentWarning = contentWarning,
-                        isSensitive = isSensitive,
                         mimeType = imeta.mimeType,
                     )
                 },
             )
         }
 
-    ZoomableContentView(
-        content = content,
-        roundedCorner = roundedCorner,
-        contentScale = contentScale,
+    val ratio = imeta.dimension?.aspectRatio() ?: MediaAspectRatioCache.get(imeta.url)
+
+    ContentWarningGate(
+        isSensitive = isSensitive,
+        reasons = reasons,
+        preloadUrls = if (isImage) listOf(imeta.url) else emptyList(),
         accountViewModel = accountViewModel,
-    )
+        modifier = mediaSizingModifier(ratio, contentScale),
+        backdrop = imeta.blurhash?.let { blurhash -> { BlurhashBackdrop(blurhash, content.description) } },
+    ) {
+        ZoomableContentView(
+            content = content,
+            roundedCorner = roundedCorner,
+            contentScale = contentScale,
+            accountViewModel = accountViewModel,
+        )
+    }
 }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/pictures/PictureCardCompose.kt

@@ -22,6 +22,7 @@ package com.vitorpamplona.amethyst.ui.screen.loggedIn.pictures
 
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.aspectRatio
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
@@ -39,11 +40,15 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import com.vitorpamplona.amethyst.commons.richtext.MediaUrlImage
+import com.vitorpamplona.amethyst.model.MediaAspectRatioCache
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.ui.components.AutoNonlazyGrid
-import com.vitorpamplona.amethyst.ui.components.SensitivityWarningOverBlurhashGrid
+import com.vitorpamplona.amethyst.ui.components.BlurhashBackdrop
+import com.vitorpamplona.amethyst.ui.components.BlurhashGridBackdrop
+import com.vitorpamplona.amethyst.ui.components.ContentWarningGate
 import com.vitorpamplona.amethyst.ui.components.ZoomableContentView
-import com.vitorpamplona.amethyst.ui.components.collectPictureReasons
+import com.vitorpamplona.amethyst.ui.components.collectContentWarningReasons
+import com.vitorpamplona.amethyst.ui.components.mediaSizingModifier
 import com.vitorpamplona.amethyst.ui.navigation.navs.INav
 import com.vitorpamplona.amethyst.ui.note.ReactionsRow
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
@@ -94,8 +99,7 @@ private fun PictureCardImage(
 ) {
     val uri = note.toNostrUri()
     val isSensitive = event.isSensitiveOrNSFW()
-    val reasons = collectPictureReasons(event)
-    val inGrid = event.imetaTags().size > 1
+    val reasons = collectContentWarningReasons(event)
 
     val images by
         remember(note) {
@@ -110,41 +114,50 @@ private fun PictureCardImage(
                             blurhash = it.blurhash,
                             dim = it.dimension,
                             uri = uri,
-                            contentWarning = reasons.firstOrNull(),
-                            // In grid mode the warning is handled at the grid level to avoid
-                            // one overlay per image. Single-image posts still warn per media.
-                            isSensitive = isSensitive && !inGrid,
                             mimeType = it.mimeType,
                         )
                     }.toImmutableList(),
             )
         }
 
-    if (images.isNotEmpty()) {
-        if (images.size == 1) {
+    if (images.isEmpty()) return
+
+    if (images.size == 1) {
+        val single = images.first()
+        val ratio = single.dim?.aspectRatio() ?: MediaAspectRatioCache.get(single.url)
+        ContentWarningGate(
+            isSensitive = isSensitive,
+            reasons = reasons,
+            preloadUrls = listOf(single.url),
+            accountViewModel = accountViewModel,
+            modifier = mediaSizingModifier(ratio, ContentScale.FillWidth),
+            backdrop = single.blurhash?.let { blurhash -> { BlurhashBackdrop(blurhash, single.description) } },
+        ) {
             ZoomableContentView(
-                content = images.first(),
+                content = single,
                 images = images,
                 roundedCorner = false,
                 contentScale = ContentScale.FillWidth,
                 accountViewModel = accountViewModel,
             )
-        } else {
-            SensitivityWarningOverBlurhashGrid(
-                isSensitive = isSensitive,
-                reasons = reasons,
-                media = images,
-                accountViewModel = accountViewModel,
-            ) {
-                AutoNonlazyGrid(images.size) {
-                    ZoomableContentView(
-                        content = images[it],
-                        images = images,
-                        roundedCorner = false,
-                        contentScale = ContentScale.Crop,
-                        accountViewModel = accountViewModel,
-                    )
-                }
+        }
+    } else {
+        ContentWarningGate(
+            isSensitive = isSensitive,
+            reasons = reasons,
+            preloadUrls = images.map { it.url },
+            accountViewModel = accountViewModel,
+            modifier = Modifier.fillMaxWidth().aspectRatio(1f),
+            backdrop = { BlurhashGridBackdrop(images) },
+        ) {
+            AutoNonlazyGrid(images.size) {
+                ZoomableContentView(
+                    content = images[it],
+                    images = images,
+                    roundedCorner = false,
+                    contentScale = ContentScale.Crop,
+                    accountViewModel = accountViewModel,
+                )
             }
         }
     }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/shorts/VideoCardCompose.kt

@@ -42,15 +42,19 @@ import com.vitorpamplona.amethyst.commons.richtext.BaseMediaContent
 import com.vitorpamplona.amethyst.commons.richtext.MediaUrlImage
 import com.vitorpamplona.amethyst.commons.richtext.MediaUrlVideo
 import com.vitorpamplona.amethyst.commons.richtext.RichTextParser
+import com.vitorpamplona.amethyst.model.MediaAspectRatioCache
 import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.components.BlurhashBackdrop
+import com.vitorpamplona.amethyst.ui.components.ContentWarningGate
 import com.vitorpamplona.amethyst.ui.components.ZoomableContentView
+import com.vitorpamplona.amethyst.ui.components.collectContentWarningReasons
+import com.vitorpamplona.amethyst.ui.components.mediaSizingModifier
 import com.vitorpamplona.amethyst.ui.navigation.navs.INav
 import com.vitorpamplona.amethyst.ui.note.ReactionsRow
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.video.UserCardHeader
 import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip31Alts.alt
-import com.vitorpamplona.quartz.nip36SensitiveContent.contentWarningReason
 import com.vitorpamplona.quartz.nip36SensitiveContent.isSensitiveOrNSFW
 import com.vitorpamplona.quartz.nip71Video.VideoEvent
 import kotlin.text.ifEmpty
@@ -99,13 +103,13 @@ private fun VideoCardImage(
     val event = (event as? Event) ?: return
 
     val imeta = videoEvent.imetaTags().getOrNull(0) ?: return
+    val isSensitive = event.isSensitiveOrNSFW()
+    val reasons = collectContentWarningReasons(event)
+    val isImage = imeta.mimeType?.startsWith("image/") == true || RichTextParser.isImageUrl(imeta.url)
 
     val content by
         remember(note) {
             val description = event.content.ifEmpty { null } ?: imeta.alt ?: event.alt()
-            val isImage = imeta.mimeType?.startsWith("image/") == true || RichTextParser.isImageUrl(imeta.url)
-            val isSensitive = event.isSensitiveOrNSFW()
-            val contentWarning = event.contentWarningReason()
 
             mutableStateOf<BaseMediaContent>(
                 if (isImage) {
@@ -116,8 +120,6 @@ private fun VideoCardImage(
                         blurhash = imeta.blurhash,
                         dim = imeta.dimension,
                         uri = note.toNostrUri(),
-                        contentWarning = contentWarning,
-                        isSensitive = isSensitive,
                         mimeType = imeta.mimeType,
                     )
                 } else {
@@ -129,20 +131,29 @@ private fun VideoCardImage(
                         dim = imeta.dimension,
                         uri = note.toNostrUri(),
                         authorName = note.author?.toBestDisplayName(),
-                        contentWarning = contentWarning,
-                        isSensitive = isSensitive,
                         mimeType = imeta.mimeType,
                     )
                 },
             )
         }
 
-    ZoomableContentView(
-        content = content,
-        roundedCorner = false,
-        contentScale = ContentScale.FillWidth,
+    val ratio = imeta.dimension?.aspectRatio() ?: MediaAspectRatioCache.get(imeta.url)
+
+    ContentWarningGate(
+        isSensitive = isSensitive,
+        reasons = reasons,
+        preloadUrls = if (isImage) listOf(imeta.url) else emptyList(),
         accountViewModel = accountViewModel,
-    )
+        modifier = mediaSizingModifier(ratio, ContentScale.FillWidth),
+        backdrop = imeta.blurhash?.let { blurhash -> { BlurhashBackdrop(blurhash, content.description) } },
+    ) {
+        ZoomableContentView(
+            content = content,
+            roundedCorner = false,
+            contentScale = ContentScale.FillWidth,
+            accountViewModel = accountViewModel,
+        )
+    }
 }
 
 @Composable

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/video/FileHeaderCardCompose.kt

@@ -42,14 +42,18 @@ import com.vitorpamplona.amethyst.commons.richtext.BaseMediaContent
 import com.vitorpamplona.amethyst.commons.richtext.MediaUrlImage
 import com.vitorpamplona.amethyst.commons.richtext.MediaUrlVideo
 import com.vitorpamplona.amethyst.commons.richtext.RichTextParser
+import com.vitorpamplona.amethyst.model.MediaAspectRatioCache
 import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.components.BlurhashBackdrop
+import com.vitorpamplona.amethyst.ui.components.ContentWarningGate
 import com.vitorpamplona.amethyst.ui.components.ZoomableContentView
+import com.vitorpamplona.amethyst.ui.components.collectContentWarningReasons
+import com.vitorpamplona.amethyst.ui.components.mediaSizingModifier
 import com.vitorpamplona.amethyst.ui.navigation.navs.INav
 import com.vitorpamplona.amethyst.ui.note.ReactionsRow
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip31Alts.alt
-import com.vitorpamplona.quartz.nip36SensitiveContent.contentWarningReason
 import com.vitorpamplona.quartz.nip36SensitiveContent.isSensitiveOrNSFW
 import com.vitorpamplona.quartz.nip94FileMetadata.FileHeaderEvent
 import kotlin.text.ifEmpty
@@ -96,16 +100,17 @@ private fun FileHeaderCardImage(
 ) {
     val fullUrl = event.url() ?: return
 
+    val isSensitive = event.isSensitiveOrNSFW()
+    val reasons = collectContentWarningReasons(event)
+    val isImage = event.mimeType()?.startsWith("image/") == true || RichTextParser.isImageUrl(fullUrl)
+    val blurHash = event.blurhash()
+    val dimensions = event.dimensions()
+
     val content by remember(note) {
-        val blurHash = event.blurhash()
         val hash = event.hash()
-        val dimensions = event.dimensions()
         val description = event.content.ifEmpty { null } ?: event.alt()
-        val isImage = event.mimeType()?.startsWith("image/") == true || RichTextParser.isImageUrl(fullUrl)
         val uri = note.toNostrUri()
         val mimeType = event.mimeType()
-        val isSensitive = event.isSensitiveOrNSFW()
-        val contentWarning = event.contentWarningReason()
 
         mutableStateOf<BaseMediaContent>(
             if (isImage) {
@@ -116,8 +121,6 @@ private fun FileHeaderCardImage(
                     blurhash = blurHash,
                     dim = dimensions,
                     uri = uri,
-                    contentWarning = contentWarning,
-                    isSensitive = isSensitive,
                     mimeType = mimeType,
                 )
             } else {
@@ -129,20 +132,29 @@ private fun FileHeaderCardImage(
                     dim = dimensions,
                     uri = uri,
                     authorName = note.author?.toBestDisplayName(),
-                    contentWarning = contentWarning,
-                    isSensitive = isSensitive,
                     mimeType = mimeType,
                 )
             },
         )
     }
 
-    ZoomableContentView(
-        content = content,
-        roundedCorner = false,
-        contentScale = ContentScale.FillWidth,
+    val ratio = dimensions?.aspectRatio() ?: MediaAspectRatioCache.get(fullUrl)
+
+    ContentWarningGate(
+        isSensitive = isSensitive,
+        reasons = reasons,
+        preloadUrls = if (isImage) listOf(fullUrl) else emptyList(),
         accountViewModel = accountViewModel,
-    )
+        modifier = mediaSizingModifier(ratio, ContentScale.FillWidth),
+        backdrop = blurHash?.let { blurhash -> { BlurhashBackdrop(blurhash, content.description) } },
+    ) {
+        ZoomableContentView(
+            content = content,
+            roundedCorner = false,
+            contentScale = ContentScale.FillWidth,
+            accountViewModel = accountViewModel,
+        )
+    }
 }
 
 @Composable

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/richtext/MediaContentModels.kt

@@ -51,7 +51,6 @@ open class MediaUrlImage(
     dim: DimensionTag? = null,
     uri: String? = null,
     val contentWarning: String? = null,
-    val isSensitive: Boolean = contentWarning != null,
     mimeType: String? = null,
 ) : MediaUrlContent(url, description, hash, dim, blurhash, uri, mimeType)
 
@@ -63,12 +62,11 @@ class EncryptedMediaUrlImage(
     dim: DimensionTag? = null,
     uri: String? = null,
     contentWarning: String? = null,
-    isSensitive: Boolean = contentWarning != null,
     mimeType: String? = null,
     val encryptionAlgo: String,
     val encryptionKey: ByteArray,
     val encryptionNonce: ByteArray,
-) : MediaUrlImage(url, description, hash, blurhash, dim, uri, contentWarning, isSensitive, mimeType)
+) : MediaUrlImage(url, description, hash, blurhash, dim, uri, contentWarning, mimeType)
 
 @Immutable
 open class MediaUrlVideo(
@@ -81,7 +79,6 @@ open class MediaUrlVideo(
     val authorName: String? = null,
     blurhash: String? = null,
     val contentWarning: String? = null,
-    val isSensitive: Boolean = contentWarning != null,
     mimeType: String? = null,
 ) : MediaUrlContent(url, description, hash, dim, blurhash, uri, mimeType)
 
@@ -96,12 +93,11 @@ class EncryptedMediaUrlVideo(
     authorName: String? = null,
     blurhash: String? = null,
     contentWarning: String? = null,
-    isSensitive: Boolean = contentWarning != null,
     mimeType: String? = null,
     val encryptionAlgo: String,
     val encryptionKey: ByteArray,
     val encryptionNonce: ByteArray,
-) : MediaUrlVideo(url, description, hash, dim, uri, artworkUri, authorName, blurhash, contentWarning, isSensitive, mimeType)
+) : MediaUrlVideo(url, description, hash, dim, uri, artworkUri, authorName, blurhash, contentWarning, mimeType)
 
 @Immutable
 abstract class MediaPreloadedContent(