Pills : finalize avatar retrieval

app/src/main/java/im/vector/riotredesign/features/home/AvatarRenderer.kt

@@ -20,11 +20,16 @@ import android.content.Context
 import android.graphics.drawable.Drawable
 import android.widget.ImageView
 import androidx.annotation.UiThread
+import androidx.annotation.WorkerThread
 import androidx.core.content.ContextCompat
 import com.amulyakhare.textdrawable.TextDrawable
+import com.bumptech.glide.load.engine.DiskCacheStrategy
 import com.bumptech.glide.request.RequestOptions
+import com.bumptech.glide.request.target.DrawableImageViewTarget
+import com.bumptech.glide.request.target.Target
 import im.vector.matrix.android.api.Matrix
 import im.vector.matrix.android.api.MatrixPatterns
+import im.vector.matrix.android.api.session.content.ContentUrlResolver
 import im.vector.matrix.android.api.session.room.model.RoomMember
 import im.vector.matrix.android.api.session.room.model.RoomSummary
 import im.vector.riotredesign.R
@@ -32,6 +37,9 @@ import im.vector.riotredesign.core.glide.GlideApp
 import im.vector.riotredesign.core.glide.GlideRequest
 import im.vector.riotredesign.core.glide.GlideRequests
 
+/**
+ * This helper centralise ways to retrieve avatar into ImageView or even generic Target<Drawable>
+ */
 object AvatarRenderer {
 
     @UiThread
@@ -46,23 +54,53 @@ object AvatarRenderer {
 
     @UiThread
     fun render(avatarUrl: String?, name: String?, imageView: ImageView) {
+        render(imageView.context, GlideApp.with(imageView), avatarUrl, name, imageView.height, DrawableImageViewTarget(imageView))
+    }
+
+    @UiThread
+    fun render(context: Context,
+               glideRequest: GlideRequests,
+               avatarUrl: String?,
+               name: String?,
+               size: Int,
+               target: Target<Drawable>) {
         if (name.isNullOrEmpty()) {
             return
         }
-        val placeholder = buildPlaceholderDrawable(imageView.context, name)
+        val placeholder = buildPlaceholderDrawable(context, name)
-        buildGlideRequest(GlideApp.with(imageView), avatarUrl)
+        buildGlideRequest(glideRequest, avatarUrl, size)
                 .placeholder(placeholder)
-                .into(imageView)
+                .into(target)
     }
 
-    fun buildGlideRequest(glideRequest: GlideRequests, avatarUrl: String?): GlideRequest<Drawable> {
+    @WorkerThread
-        val resolvedUrl = Matrix.getInstance().currentSession.contentUrlResolver().resolveFullSize(avatarUrl)
+    fun getCachedOrPlaceholder(context: Context,
+                               glideRequest: GlideRequests,
+                               avatarUrl: String?,
+                               text: String,
+                               size: Int): Drawable {
+        val future = buildGlideRequest(glideRequest, avatarUrl, size).onlyRetrieveFromCache(true).submit()
+        return try {
+            future.get()
+        } catch (exception: Exception) {
+            buildPlaceholderDrawable(context, text)
+        }
+    }
+
+    // PRIVATE API *********************************************************************************
+
+    private fun buildGlideRequest(glideRequest: GlideRequests, avatarUrl: String?, size: Int): GlideRequest<Drawable> {
+        val resolvedUrl = Matrix.getInstance().currentSession
+                .contentUrlResolver()
+                .resolveThumbnail(avatarUrl, size, size, ContentUrlResolver.ThumbnailMethod.SCALE)
+
         return glideRequest
                 .load(resolvedUrl)
                 .apply(RequestOptions.circleCropTransform())
+                .diskCacheStrategy(DiskCacheStrategy.DATA)
     }
 
-    fun buildPlaceholderDrawable(context: Context, text: String): Drawable {
+    private fun buildPlaceholderDrawable(context: Context, text: String): Drawable {
         val avatarColor = ContextCompat.getColor(context, R.color.pale_teal)
         return if (text.isEmpty()) {
             TextDrawable.builder().buildRound("", avatarColor)

app/src/main/java/im/vector/riotredesign/features/home/room/detail/timeline/MessageTextItem.kt

@@ -48,11 +48,6 @@ abstract class MessageTextItem : AbsMessageItem<MessageTextItem.Holder>() {
         findPillsAndProcess { it.bind(holder.messageView) }
     }
 
-    override fun unbind(holder: Holder) {
-        findPillsAndProcess { it.unbind() }
-        super.unbind(holder)
-    }
-
     private fun findPillsAndProcess(processBlock: (span: PillImageSpan) -> Unit) {
         GlobalScope.launch(Dispatchers.Main) {
             val pillImageSpans: Array<PillImageSpan>? = withContext(Dispatchers.IO) {

app/src/main/java/im/vector/riotredesign/features/html/EventHtmlRenderer.kt

@@ -148,7 +148,7 @@ private class MxLinkHandler(private val glideRequests: GlideRequests,
             val permalinkData = PermalinkParser.parse(link)
             when (permalinkData) {
                 is PermalinkData.UserLink -> {
-                    val user = session.getUser(permalinkData.userId) ?: return
+                    val user = session.getUser(permalinkData.userId)
                     val span = PillImageSpan(glideRequests, context, permalinkData.userId, user)
                     SpannableBuilder.setSpans(
                             visitor.builder(),

app/src/main/java/im/vector/riotredesign/features/html/PillImageSpan.kt

@@ -22,7 +22,7 @@ import android.graphics.Paint
 import android.graphics.drawable.Drawable
 import android.text.style.ReplacementSpan
 import android.widget.TextView
-import androidx.annotation.MainThread
+import androidx.annotation.UiThread
 import com.bumptech.glide.request.target.SimpleTarget
 import com.bumptech.glide.request.transition.Transition
 import com.google.android.material.chip.ChipDrawable
@@ -32,36 +32,33 @@ import im.vector.riotredesign.core.glide.GlideRequests
 import im.vector.riotredesign.features.home.AvatarRenderer
 import java.lang.ref.WeakReference
 
+/**
+ * This span is able to replace a text by a [ChipDrawable]
+ * It's needed to call [bind] method to start requesting avatar, otherwise only the placeholder icon will be displayed if not already cached.
+ */
+
+private const val PILL_AVATAR_SIZE = 80
+
 class PillImageSpan(private val glideRequests: GlideRequests,
                     private val context: Context,
                     private val userId: String,
                     private val user: User?) : ReplacementSpan() {
 
-    private val pillDrawable = createChipDrawable(context, userId, user)
+    private val displayName by lazy {
+        if (user?.displayName.isNullOrEmpty()) userId else user?.displayName!!
+    }
+
+    private val pillDrawable = createChipDrawable()
     private val target = PillImageSpanTarget(this)
     private var tv: WeakReference<TextView>? = null
 
-    @MainThread
+    @UiThread
     fun bind(textView: TextView) {
         tv = WeakReference(textView)
-        AvatarRenderer.buildGlideRequest(glideRequests, user?.avatarUrl).into(target)
+        AvatarRenderer.render(context, glideRequests, user?.avatarUrl, displayName, PILL_AVATAR_SIZE, target)
     }
 
-    @MainThread
+    // ReplacementSpan *****************************************************************************
-    fun unbind() {
-        glideRequests.clear(target)
-        tv = null
-    }
-
-    @MainThread
-    private fun updateAvatarDrawable(drawable: Drawable?) {
-        pillDrawable.apply {
-            chipIcon = drawable
-        }
-        tv?.get()?.apply {
-            invalidate()
-        }
-    }
 
     override fun getSize(paint: Paint, text: CharSequence,
                          start: Int,
@@ -85,7 +82,6 @@ class PillImageSpan(private val glideRequests: GlideRequests,
                       y: Int,
                       bottom: Int,
                       paint: Paint) {
-
         canvas.save()
         val transY = bottom - pillDrawable.bounds.bottom
         canvas.translate(x, transY.toFloat())
@@ -93,21 +89,36 @@ class PillImageSpan(private val glideRequests: GlideRequests,
         canvas.restore()
     }
 
-    private fun createChipDrawable(context: Context, userId: String, user: User?): ChipDrawable {
+    internal fun updateAvatarDrawable(drawable: Drawable?) {
+        pillDrawable.apply {
+            chipIcon = drawable
+        }
+        tv?.get()?.apply {
+            invalidate()
+        }
+    }
+
+    // Private methods *****************************************************************************
+
+    private fun createChipDrawable(): ChipDrawable {
         val textPadding = context.resources.getDimension(R.dimen.pill_text_padding)
-        val displayName = if (user?.displayName.isNullOrEmpty()) userId else user?.displayName!!
         return ChipDrawable.createFromResource(context, R.xml.pill_view).apply {
             setText(displayName)
             textEndPadding = textPadding
             textStartPadding = textPadding
             setChipMinHeightResource(R.dimen.pill_min_height)
             setChipIconSizeResource(R.dimen.pill_avatar_size)
-            chipIcon = AvatarRenderer.buildPlaceholderDrawable(context, displayName)
+            chipIcon = AvatarRenderer.getCachedOrPlaceholder(context, glideRequests, user?.avatarUrl, displayName, PILL_AVATAR_SIZE)
             setBounds(0, 0, intrinsicWidth, intrinsicHeight)
         }
     }
 
-    private class PillImageSpanTarget(pillImageSpan: PillImageSpan) : SimpleTarget<Drawable>() {
+}
+
+/**
+ * Glide target to handle avatar retrieval into [PillImageSpan].
+ */
+private class PillImageSpanTarget(pillImageSpan: PillImageSpan) : SimpleTarget<Drawable>() {
 
     private val pillImageSpan = WeakReference(pillImageSpan)
 
@@ -121,9 +132,7 @@ class PillImageSpan(private val glideRequests: GlideRequests,
 
     private fun updateWith(drawable: Drawable?) {
         pillImageSpan.get()?.apply {
-                this.updateAvatarDrawable(drawable)
+            updateAvatarDrawable(drawable)
         }
     }
-    }
-
 }