More manga info header tweaks

app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/MangaInfoChaptersController.kt

@@ -515,6 +515,9 @@ class MangaInfoChaptersController(private val fromSource: Boolean = false) :
             fetchChaptersFromSource()
         }
 
+        val header = headerAdapter ?: return
+        header.setNumChapters(chapters.size)
+
         val adapter = chaptersAdapter ?: return
         adapter.updateDataSet(chapters)
 

app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/MangaInfoHeaderAdapter.kt

@@ -41,6 +41,7 @@ class MangaInfoHeaderAdapter(
 
     private var manga: Manga? = null
     private var source: Source? = null
+    private var numChapters: Int? = null
 
     private val scope = CoroutineScope(Job() + Dispatchers.Main)
     private lateinit var binding: MangaInfoHeaderBinding
@@ -71,6 +72,12 @@ class MangaInfoHeaderAdapter(
         notifyDataSetChanged()
     }
 
+    fun setNumChapters(numChapters: Int) {
+        this.numChapters = numChapters
+
+        notifyDataSetChanged()
+    }
+
     inner class HeaderViewHolder(private val view: View) : RecyclerView.ViewHolder(view) {
         fun bind() {
             if (manga == null) {
@@ -155,6 +162,7 @@ class MangaInfoHeaderAdapter(
                 .launchIn(scope)
 
             setMangaInfo(manga!!, source)
+            setChapterInfo()
         }
 
         /**
@@ -316,5 +324,14 @@ class MangaInfoHeaderAdapter(
                 isChecked = isFavorite
             }
         }
+
+        private fun setChapterInfo() {
+            // Chapters heading
+            binding.chaptersLabel.text = if (numChapters == null) {
+                view.context.getString(R.string.chapters)
+            } else {
+                view.context.resources.getQuantityString(R.plurals.manga_num_chapters, numChapters!!, numChapters)
+            }
+        }
     }
 }