Show loading/error for images in catalogue grid view. Update support lib

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CatalogueFragment.kt

@@ -486,14 +486,10 @@ open class CatalogueFragment : BaseRxFragment<CataloguePresenter>(),
      * @return the holder of the manga or null if it's not bound.
      */
     private fun getHolder(manga: Manga): CatalogueHolder? {
-        val layoutManager = recycler.layoutManager as LinearLayoutManager
-        val firstVisiblePos = layoutManager.findFirstVisibleItemPosition()
-        val lastVisiblePos = layoutManager.findLastVisibleItemPosition()
-
-        (firstVisiblePos..lastVisiblePos-1).forEach { i ->
-            val item = adapter.getItem(i) as? CatalogueItem
+        adapter.allBoundViewHolders.forEach { holder ->
+            val item = adapter.getItem(holder.adapterPosition) as? CatalogueItem
             if (item != null && item.manga.id!! == manga.id!!) {
-                return recycler.findViewHolderForLayoutPosition(i) as? CatalogueHolder
+                return holder as CatalogueHolder
             }
         }
 

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CatalogueGridHolder.kt

@@ -4,7 +4,9 @@ import android.view.View
 import com.bumptech.glide.Glide
 import com.bumptech.glide.load.engine.DiskCacheStrategy
 import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.database.models.Manga
+import eu.kanade.tachiyomi.widget.StateImageViewTarget
 import kotlinx.android.synthetic.main.item_catalogue_grid.view.*
 
 /**
@@ -42,8 +44,9 @@ class CatalogueGridHolder(private val view: View, private val adapter: FlexibleA
                     .diskCacheStrategy(DiskCacheStrategy.SOURCE)
                     .centerCrop()
                     .skipMemoryCache(true)
+                    .error(R.drawable.ic_broken_image_grey_24dp)
                     .placeholder(android.R.color.transparent)
-                    .into(view.thumbnail)
+                    .into(StateImageViewTarget(view.thumbnail, view.progress))
 
         }
     }

app/src/main/java/eu/kanade/tachiyomi/util/ViewExtensions.kt

@@ -1,3 +1,5 @@
+@file:Suppress("NOTHING_TO_INLINE")
+
 package eu.kanade.tachiyomi.util
 
 import android.graphics.Color
@@ -28,4 +30,16 @@ inline fun View.snack(message: String, length: Int = Snackbar.LENGTH_LONG, f: Sn
     snack.f()
     snack.show()
     return snack
-}
+}
+
+inline fun View.visible() {
+    visibility = View.VISIBLE
+}
+
+inline fun View.invisible() {
+    visibility = View.INVISIBLE
+}
+
+inline fun View.gone() {
+    visibility = View.GONE
+}

app/src/main/java/eu/kanade/tachiyomi/widget/StateImageViewTarget.kt

@@ -0,0 +1,49 @@
+package eu.kanade.tachiyomi.widget
+
+import android.graphics.drawable.Drawable
+import android.widget.ImageView
+import android.widget.ImageView.ScaleType
+import android.widget.ProgressBar
+import com.bumptech.glide.load.resource.drawable.GlideDrawable
+import com.bumptech.glide.request.animation.GlideAnimation
+import com.bumptech.glide.request.target.GlideDrawableImageViewTarget
+import eu.kanade.tachiyomi.util.gone
+import eu.kanade.tachiyomi.util.visible
+
+/**
+ * A glide target to display an image with an optional progress bar and a configurable scale type
+ * for the error drawable.
+ *
+ * @param view the view where the image will be loaded
+ * @param progress an optional progress bar to show when the image is loading.
+ * @param errorScaleType the scale type for the error drawable, [ScaleType.CENTER] by default.
+ */
+class StateImageViewTarget(view: ImageView,
+                           val progress: ProgressBar? = null,
+                           val errorScaleType: ScaleType = ScaleType.CENTER) :
+        GlideDrawableImageViewTarget(view) {
+
+    private val imageScaleType = view.scaleType
+
+    override fun onLoadStarted(placeholder: Drawable?) {
+        progress?.visible()
+        super.onLoadStarted(placeholder)
+    }
+
+    override fun onLoadFailed(e: Exception?, errorDrawable: Drawable?) {
+        progress?.gone()
+        view.scaleType = errorScaleType
+        super.onLoadFailed(e, errorDrawable)
+    }
+
+    override fun onLoadCleared(placeholder: Drawable?) {
+        progress?.gone()
+        super.onLoadCleared(placeholder)
+    }
+
+    override fun onResourceReady(resource: GlideDrawable?, animation: GlideAnimation<in GlideDrawable>?) {
+        progress?.gone()
+        view.scaleType = imageScaleType
+        super.onResourceReady(resource, animation)
+    }
+}