fix: Show previews for playable audio media from accounts (#460)

Previous code showed a generic placeholder for audio media on the
account's "Media" tab.

Fix this so the preview image is shown (if it's available).

- Move the "is this attachment previewable?" code to `Attachment` so it
can be reused here.

- Restructure the logic in `AccountMediaGridAdapter` to use the new
`isPreviewable()` method when deciding whether to show a preview.

- Attachments have dedicated placeholder drawables, use those when the
preview is not available.

app/lint-baseline.xml

@@ -216,17 +216,6 @@
             column="5"/>
     </issue>
 
-    <issue
-        id="MissingQuantity"
-        message="For locale &quot;ru&quot; (Russian) the following quantities should also be defined: `few` (e.g. &quot;из 2 книг за 2 дня&quot;), `many` (e.g. &quot;из 5 книг за 5 дней&quot;), `one` (e.g. &quot;из 1 книги за 1 день&quot;)"
-        errorLine1="    &lt;plurals name=&quot;hint_describe_for_visually_impaired&quot;>"
-        errorLine2="    ^">
-        <location
-            file="src/main/res/values-ru/strings.xml"
-            line="279"
-            column="5"/>
-    </issue>
-
     <issue
         id="MissingQuantity"
         message="For locale &quot;hi&quot; (Hindi) the following quantity should also be defined: `one` (e.g. &quot;1 घंटा&quot;)"

app/src/main/java/app/pachli/adapter/StatusBaseViewHolder.kt

@@ -897,14 +897,14 @@ abstract class StatusBaseViewHolder<T : IStatusViewData> protected constructor(i
     }
 
     companion object {
+        /**
+         * @return True if all [attachments] are previewable.
+         *
+         * @see Attachment.isPreviewable
+         */
         @JvmStatic
         protected fun hasPreviewableAttachment(attachments: List<Attachment>): Boolean {
-            for (attachment in attachments) {
-                if (attachment.type == Attachment.Type.UNKNOWN) return false
-
-                if (attachment.meta?.original?.width == null && attachment.meta?.small?.width == null) return false
-            }
-            return true
+            return attachments.all { it.isPreviewable() }
         }
 
         private fun getReblogDescription(context: Context, status: IStatusViewData): CharSequence {

app/src/main/java/app/pachli/components/account/media/AccountMediaGridAdapter.kt

@@ -7,19 +7,18 @@ import android.view.View
 import android.view.ViewGroup
 import android.widget.Toast
 import androidx.appcompat.content.res.AppCompatResources
-import androidx.core.view.setPadding
 import androidx.paging.PagingDataAdapter
 import androidx.recyclerview.widget.DiffUtil
 import app.pachli.R
+import app.pachli.adapter.isPlayable
 import app.pachli.core.activity.decodeBlurHash
-import app.pachli.core.common.extensions.hide
 import app.pachli.core.common.extensions.show
-import app.pachli.core.designsystem.R as DR
+import app.pachli.core.common.extensions.visible
 import app.pachli.core.navigation.AttachmentViewData
-import app.pachli.core.network.model.Attachment
 import app.pachli.databinding.ItemAccountMediaBinding
 import app.pachli.util.BindingHolder
 import app.pachli.util.getFormattedDescription
+import app.pachli.util.iconResource
 import com.bumptech.glide.Glide
 import com.google.android.material.color.MaterialColors
 import java.util.Random
@@ -41,7 +40,7 @@ class AccountMediaGridAdapter(
 ) {
 
     private val baseItemBackgroundColor = MaterialColors.getColor(context, com.google.android.material.R.attr.colorSurface, Color.BLACK)
-    private val videoIndicator = AppCompatResources.getDrawable(context, R.drawable.ic_play_indicator)
+    private val playableIcon = AppCompatResources.getDrawable(context, R.drawable.ic_play_indicator)
     private val mediaHiddenDrawable = AppCompatResources.getDrawable(context, R.drawable.ic_hide_media_24dp)
 
     private val itemBgBaseHSV = FloatArray(3)
@@ -57,59 +56,53 @@ class AccountMediaGridAdapter(
 
     override fun onBindViewHolder(holder: BindingHolder<ItemAccountMediaBinding>, position: Int) {
         val context = holder.binding.root.context
-        getItem(position)?.let { item ->
 
+        getItem(position)?.let { item ->
             val imageView = holder.binding.accountMediaImageView
             val overlay = holder.binding.accountMediaImageViewOverlay
 
-            val blurhash = item.attachment.blurhash
-            val placeholder = if (useBlurhash && blurhash != null) {
-                decodeBlurHash(context, blurhash)
-            } else {
-                null
+            val placeholder = item.attachment.blurhash?.let {
+                if (useBlurhash) decodeBlurHash(context, it) else null
             }
 
-            if (item.attachment.type == Attachment.Type.AUDIO) {
-                overlay.hide()
-
-                imageView.setPadding(context.resources.getDimensionPixelSize(DR.dimen.profile_media_audio_icon_padding))
-
-                Glide.with(imageView)
-                    .load(R.drawable.ic_music_box_preview_24dp)
-                    .centerInside()
-                    .into(imageView)
-
-                imageView.contentDescription = item.attachment.getFormattedDescription(context)
-            } else if (item.sensitive && !item.isRevealed) {
-                overlay.show()
-                overlay.setImageDrawable(mediaHiddenDrawable)
-
-                imageView.setPadding(0)
-
-                Glide.with(imageView)
-                    .load(placeholder)
-                    .centerInside()
-                    .into(imageView)
-
-                imageView.contentDescription = imageView.context.getString(R.string.post_media_hidden_title)
-            } else {
-                if (item.attachment.type == Attachment.Type.VIDEO || item.attachment.type == Attachment.Type.GIFV) {
+            when {
+                item.sensitive && !item.isRevealed -> {
                     overlay.show()
-                    overlay.setImageDrawable(videoIndicator)
-                } else {
-                    overlay.hide()
+                    overlay.setImageDrawable(mediaHiddenDrawable)
+
+                    Glide.with(imageView)
+                        .load(placeholder)
+                        .centerInside()
+                        .into(imageView)
+
+                    imageView.contentDescription = context.getString(R.string.post_media_hidden_title)
                 }
 
-                imageView.setPadding(0)
+                item.attachment.isPreviewable() -> {
+                    if (item.attachment.type.isPlayable()) overlay.setImageDrawable(playableIcon)
+                    overlay.visible(item.attachment.type.isPlayable())
 
-                Glide.with(imageView)
-                    .asBitmap()
-                    .load(item.attachment.previewUrl)
-                    .placeholder(placeholder)
-                    .centerInside()
-                    .into(imageView)
+                    Glide.with(imageView)
+                        .asBitmap()
+                        .load(item.attachment.previewUrl)
+                        .placeholder(placeholder)
+                        .centerInside()
+                        .into(imageView)
 
-                imageView.contentDescription = item.attachment.getFormattedDescription(context)
+                    imageView.contentDescription = item.attachment.getFormattedDescription(context)
+                }
+
+                else -> {
+                    if (item.attachment.type.isPlayable()) overlay.setImageDrawable(playableIcon)
+                    overlay.visible(item.attachment.type.isPlayable())
+
+                    Glide.with(imageView)
+                        .load(item.attachment.iconResource())
+                        .centerInside()
+                        .into(imageView)
+
+                    imageView.contentDescription = item.attachment.getFormattedDescription(context)
+                }
             }
 
             holder.binding.root.setOnClickListener {
@@ -118,7 +111,7 @@ class AccountMediaGridAdapter(
 
             holder.binding.root.setOnLongClickListener { view ->
                 val description = item.attachment.getFormattedDescription(view.context)
-                Toast.makeText(view.context, description, Toast.LENGTH_LONG).show()
+                Toast.makeText(context, description, Toast.LENGTH_LONG).show()
                 true
             }
         }

core/designsystem/src/main/res/values/dimens.xml

@@ -63,8 +63,6 @@
 
     <dimen name="profile_media_spacing">3dp</dimen>
 
-    <dimen name="profile_media_audio_icon_padding">16dp</dimen>
-
     <dimen name="preview_image_spacing">4dp</dimen>
 
     <dimen name="graph_line_thickness">1dp</dimen>

core/network/src/main/kotlin/app/pachli/core/network/model/Attachment.kt

@@ -103,4 +103,13 @@ data class Attachment(
                 return (width / height).toDouble()
             }
     }
+
+    /**
+     * @return True if this attachment can be previewed. A previewable attachment
+     *     must be a known type and have a non-null width for the preview image.
+     */
+    fun isPreviewable(): Boolean {
+        if (type == Type.UNKNOWN) return false
+        return !(meta?.original?.width == null && meta?.small?.width == null)
+    }
 }