Update reader

app/src/main/java/org/koitharu/kotatsu/ui/common/BaseFullscreenActivity.kt

@@ -1,14 +1,9 @@
 package org.koitharu.kotatsu.ui.common
 
-import android.os.Bundle
 import android.view.View
 
 abstract class BaseFullscreenActivity : BaseActivity() {
 
-	override fun onCreate(savedInstanceState: Bundle?) {
-		super.onCreate(savedInstanceState)
-	}
-
 	override fun onWindowFocusChanged(hasFocus: Boolean) {
 		super.onWindowFocusChanged(hasFocus)
 		if (hasFocus) hideSystemUI()
@@ -28,6 +23,4 @@ abstract class BaseFullscreenActivity : BaseActivity() {
 				or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
 				or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN)
 	}
-
-	abstract fun onFullscreenModeChanged(isFullscreen: Boolean)
 }

app/src/main/java/org/koitharu/kotatsu/ui/details/ChaptersAdapter.kt

@@ -16,7 +16,8 @@ class ChaptersAdapter(onItemClickListener: OnRecyclerItemClickListener<MangaChap
 			updateCurrentPosition()
 		}
 
-	private var currentChapterPosition = RecyclerView.NO_POSITION
+	var currentChapterPosition = RecyclerView.NO_POSITION
+		private set
 
 	override fun onCreateViewHolder(parent: ViewGroup) = ChapterHolder(parent)
 

app/src/main/java/org/koitharu/kotatsu/ui/reader/ChaptersDialog.kt

@@ -5,6 +5,7 @@ import android.view.View
 import androidx.appcompat.app.AlertDialog
 import androidx.fragment.app.FragmentManager
 import androidx.recyclerview.widget.DividerItemDecoration
+import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import kotlinx.android.synthetic.main.dialog_chapters.*
 import org.koitharu.kotatsu.R
@@ -14,7 +15,8 @@ import org.koitharu.kotatsu.ui.common.list.OnRecyclerItemClickListener
 import org.koitharu.kotatsu.ui.details.ChaptersAdapter
 import org.koitharu.kotatsu.utils.ext.withArgs
 
-class ChaptersDialog : AlertDialogFragment(R.layout.dialog_chapters), OnRecyclerItemClickListener<MangaChapter> {
+class ChaptersDialog : AlertDialogFragment(R.layout.dialog_chapters),
+	OnRecyclerItemClickListener<MangaChapter> {
 
 	override fun onBuildDialog(builder: AlertDialog.Builder) {
 		builder.setTitle(R.string.chapters)
@@ -23,9 +25,25 @@ class ChaptersDialog : AlertDialogFragment(R.layout.dialog_chapters), OnRecycler
 	}
 
 	override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-		recyclerView_chapters.addItemDecoration(DividerItemDecoration(requireContext(), RecyclerView.VERTICAL))
+		recyclerView_chapters.addItemDecoration(
+			DividerItemDecoration(
+				requireContext(),
+				RecyclerView.VERTICAL
+			)
+		)
 		recyclerView_chapters.adapter = ChaptersAdapter(this).apply {
 			arguments?.getParcelableArrayList<MangaChapter>(ARG_CHAPTERS)?.let(this::replaceData)
+			currentChapterId = arguments?.getLong(ARG_CURRENT_ID, 0L)?.takeUnless { it == 0L }
+		}
+	}
+
+	override fun onResume() {
+		super.onResume()
+		val pos = (recyclerView_chapters.adapter as? ChaptersAdapter)?.currentChapterPosition
+			?: RecyclerView.NO_POSITION
+		if (pos != RecyclerView.NO_POSITION) {
+			(recyclerView_chapters.layoutManager as? LinearLayoutManager)
+				?.scrollToPositionWithOffset(pos, 100)
 		}
 	}
 
@@ -38,10 +56,13 @@ class ChaptersDialog : AlertDialogFragment(R.layout.dialog_chapters), OnRecycler
 		private const val TAG = "ChaptersDialog"
 
 		private const val ARG_CHAPTERS = "chapters"
+		private const val ARG_CURRENT_ID = "current_id"
 
-		fun show(fm: FragmentManager, chapters: List<MangaChapter>) = ChaptersDialog()
-			.withArgs(1) {
-				putParcelableArrayList(ARG_CHAPTERS, ArrayList(chapters))
-			}.show(fm, TAG)
+		fun show(fm: FragmentManager, chapters: List<MangaChapter>, currentId: Long = 0L) =
+			ChaptersDialog()
+				.withArgs(2) {
+					putParcelableArrayList(ARG_CHAPTERS, ArrayList(chapters))
+					putLong(ARG_CURRENT_ID, currentId)
+				}.show(fm, TAG)
 	}
 }

app/src/main/java/org/koitharu/kotatsu/ui/reader/PageHolder.kt

@@ -23,23 +23,23 @@ class PageHolder(parent: ViewGroup, private val loader: PageLoader) : BaseViewHo
 
 	override fun onBind(data: MangaPage, extra: Unit) {
 		layout_error.isVisible = false
-		progressBar.show()
+		progressBar.isVisible = true
 		ssiv.recycle()
 		loader.load(data.url) {
 			ssiv.setImage(ImageSource.uri(it.toUri()))
 		}
 	}
 
-	override fun onReady() {
-		progressBar.hide()
-	}
+	override fun onReady() = Unit
 
 	override fun onImageLoadError(e: Exception) {
 		textView_error.text = e.getDisplayMessage(context.resources)
 		layout_error.isVisible = true
 	}
 
-	override fun onImageLoaded() = Unit
+	override fun onImageLoaded() {
+		progressBar.isVisible = false
+	}
 
 	override fun onTileLoadError(e: Exception?) = Unit
 

app/src/main/java/org/koitharu/kotatsu/ui/reader/ReaderActivity.kt

@@ -76,7 +76,7 @@ class ReaderActivity : BaseFullscreenActivity(), ReaderView {
 
 	override fun onOptionsItemSelected(item: MenuItem) = when (item.itemId) {
 		R.id.action_chapters -> {
-			ChaptersDialog.show(supportFragmentManager, state.manga.chapters.orEmpty())
+			ChaptersDialog.show(supportFragmentManager, state.manga.chapters.orEmpty(), state.chapterId)
 			true
 		}
 		else -> super.onOptionsItemSelected(item)
@@ -99,9 +99,15 @@ class ReaderActivity : BaseFullscreenActivity(), ReaderView {
 		}
 	}
 
-	override fun onFullscreenModeChanged(isFullscreen: Boolean) {
-		appbar_top.isGone = isFullscreen
-		appbar_bottom.isGone = isFullscreen
+	private fun onTapCenter() {
+		if (appbar_top.isVisible) {
+			appbar_top.isGone = false
+			appbar_bottom.isGone = false
+		} else {
+			appbar_top.isGone = true
+			appbar_bottom.isGone = true
+			showSystemUI()
+		}
 	}
 
 	companion object {

app/src/main/res/layout/item_page.xml

@@ -10,7 +10,7 @@
 		android:layout_width="match_parent"
 		android:layout_height="match_parent" />
 
-	<androidx.core.widget.ContentLoadingProgressBar
+	<ProgressBar
 		android:id="@+id/progressBar"
 		android:layout_width="wrap_content"
 		android:layout_height="wrap_content"