Show download progress in download icons

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

@@ -705,7 +705,7 @@ class MangaController :
         }
     }
 
-    fun onChapterStatusChange(download: Download) {
+    fun onChapterDownloadUpdate(download: Download) {
         chaptersAdapter?.currentItems?.find { it.id == download.chapter.id }?.let {
             chaptersAdapter?.updateItem(it)
             chaptersAdapter?.notifyDataSetChanged()

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

@@ -79,7 +79,8 @@ class MangaPresenter(
     /**
      * Subscription to observe download status changes.
      */
-    private var observeDownloadsSubscription: Subscription? = null
+    private var observeDownloadsStatusSubscription: Subscription? = null
+    private var observeDownloadsPageSubscription: Subscription? = null
 
     override fun onCreate(savedState: Bundle?) {
         super.onCreate(savedState)
@@ -293,12 +294,20 @@ class MangaPresenter(
     // Chapters list - start
 
     private fun observeDownloads() {
-        observeDownloadsSubscription?.let { remove(it) }
-        observeDownloadsSubscription = downloadManager.queue.getStatusObservable()
+        observeDownloadsStatusSubscription?.let { remove(it) }
+        observeDownloadsStatusSubscription = downloadManager.queue.getStatusObservable()
             .observeOn(AndroidSchedulers.mainThread())
             .filter { download -> download.manga.id == manga.id }
             .doOnNext { onDownloadStatusChange(it) }
-            .subscribeLatestCache(MangaController::onChapterStatusChange) { _, error ->
+            .subscribeLatestCache(MangaController::onChapterDownloadUpdate) { _, error ->
+                Timber.e(error)
+            }
+
+        observeDownloadsPageSubscription?.let { remove(it) }
+        observeDownloadsPageSubscription = downloadManager.queue.getProgressObservable()
+            .observeOn(AndroidSchedulers.mainThread())
+            .filter { download -> download.manga.id == manga.id }
+            .subscribeLatestCache(MangaController::onChapterDownloadUpdate) { _, error ->
                 Timber.e(error)
             }
     }

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

@@ -22,7 +22,7 @@ class ChapterDownloadView @JvmOverloads constructor(context: Context, attrs: Att
         addView(binding.root)
     }
 
-    fun setState(state: Download.State) {
+    fun setState(state: Download.State, progress: Int = 0) {
         binding.downloadIconBorder.isVisible = state == Download.State.NOT_DOWNLOADED
 
         binding.downloadIcon.isVisible = state == Download.State.NOT_DOWNLOADED || state == Download.State.DOWNLOADING
@@ -44,7 +44,13 @@ class ChapterDownloadView @JvmOverloads constructor(context: Context, attrs: Att
         }
 
         binding.downloadProgress.isVisible = state == Download.State.DOWNLOADING || state == Download.State.QUEUE
-        // TODO: show actual download progress
+        // Spinner when queued
+        val isDownloading = state == Download.State.DOWNLOADING || (state == Download.State.QUEUE && progress > 0)
+        binding.downloadProgress.isIndeterminate = !isDownloading
+        // Actual progress when downloading or partially downloaded
+        if (isDownloading) {
+            binding.downloadProgress.progress = progress
+        }
 
         binding.downloadedIcon.isVisible = state == Download.State.DOWNLOADED
 

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

@@ -69,6 +69,6 @@ class ChapterHolder(
         }
 
         binding.download.isVisible = item.manga.source != LocalSource.ID
-        binding.download.setState(item.status)
+        binding.download.setState(item.status, item.progress)
     }
 }

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

@@ -9,6 +9,7 @@ import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.database.models.Chapter
 import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.data.download.model.Download
+import eu.kanade.tachiyomi.source.model.Page
 
 class ChapterItem(val chapter: Chapter, val manga: Manga) :
     AbstractFlexibleItem<ChapterHolder>(),
@@ -22,6 +23,12 @@ class ChapterItem(val chapter: Chapter, val manga: Manga) :
             _status = value
         }
 
+    val progress: Int
+        get() {
+            val pages = download?.pages ?: return 0
+            return pages.map(Page::progress).average().toInt()
+        }
+
     @Transient
     var download: Download? = null