Use MainScope for coroutines in ui package classes (#8845)

(cherry picked from commit 920ca405a2116065840c7dd074209d902bfd3419)

# Conflicts:
#	app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerPageHolder.kt

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerPageHolder.kt

@@ -13,15 +13,14 @@ import eu.kanade.tachiyomi.ui.reader.model.ReaderPage
 import eu.kanade.tachiyomi.ui.reader.viewer.ReaderPageImageView
 import eu.kanade.tachiyomi.ui.reader.viewer.ReaderProgressIndicator
 import eu.kanade.tachiyomi.ui.webview.WebViewActivity
-import eu.kanade.tachiyomi.util.lang.launchUI
 import eu.kanade.tachiyomi.util.system.ImageUtil
 import eu.kanade.tachiyomi.util.system.logcat
 import eu.kanade.tachiyomi.widget.ViewPagerAdapter
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.launch
 import logcat.LogPriority
 import rx.Observable
 import rx.Subscription
@@ -65,7 +64,7 @@ class PagerPageHolder(
      */
     private var errorLayout: ReaderErrorBinding? = null
 
-    private val scope = CoroutineScope(Dispatchers.IO)
+    private val scope = MainScope()
 
     /**
      * Subscription for status changes of the page.
@@ -144,7 +143,7 @@ class PagerPageHolder(
 
     private fun launchProgressJob() {
         progressJob?.cancel()
-        progressJob = scope.launchUI {
+        progressJob = scope.launch {
             page.progressFlow.collectLatest { value -> progressIndicator.setProgress(value) }
         }
     }
@@ -152,7 +151,7 @@ class PagerPageHolder(
     private fun launchProgressJob2() {
         extraProgressJob?.cancel()
         val extraPage = extraPage ?: return
-        extraProgressJob = scope.launchUI {
+        extraProgressJob = scope.launch {
             extraPage.progressFlow.collectLatest { value -> progressIndicator.setProgress(((page.progressFlow.value + value) / 2 * 0.95f).roundToInt()) }
         }
     }
@@ -379,7 +378,7 @@ class PagerPageHolder(
             logcat(LogPriority.ERROR) { "Cannot combine pages" }
             return imageBytes.inputStream()
         }
-        viewer.scope.launchUI { progressIndicator.setProgress(96) }
+        scope.launch { progressIndicator.setProgress(96) }
         val height = imageBitmap.height
         val width = imageBitmap.width
 
@@ -407,7 +406,7 @@ class PagerPageHolder(
             logcat(LogPriority.ERROR) { "Cannot combine pages" }
             return imageBytes.inputStream()
         }
-        viewer.scope.launchUI { progressIndicator.setProgress(97) }
+        scope.launch { progressIndicator.setProgress(97) }
         val height2 = imageBitmap2.height
         val width2 = imageBitmap2.width
 
@@ -431,7 +430,7 @@ class PagerPageHolder(
         }
 
         return ImageUtil.mergeBitmaps(imageBitmap, imageBitmap2, isLTR, centerMargin, viewer.config.pageCanvasColor) {
-            viewer.scope.launchUI {
+            scope.launch {
                 if (it == 100) {
                     progressIndicator.hide()
                 } else {
@@ -442,7 +441,7 @@ class PagerPageHolder(
     }
 
     private fun splitDoublePages() {
-        viewer.scope.launchUI {
+        scope.launch {
             delay(100)
             viewer.splitDoublePages(page)
             if (extraPage?.fullPage == true || page.fullPage) {

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerTransitionHolder.kt

@@ -15,13 +15,12 @@ import eu.kanade.tachiyomi.ui.reader.model.ChapterTransition
 import eu.kanade.tachiyomi.ui.reader.model.ReaderChapter
 import eu.kanade.tachiyomi.ui.reader.viewer.ReaderButton
 import eu.kanade.tachiyomi.ui.reader.viewer.ReaderTransitionView
-import eu.kanade.tachiyomi.util.lang.launchUI
 import eu.kanade.tachiyomi.util.system.dpToPx
 import eu.kanade.tachiyomi.widget.ViewPagerAdapter
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.launch
 
 /**
  * View of the ViewPager that contains a chapter transition.
@@ -33,7 +32,7 @@ class PagerTransitionHolder(
     val transition: ChapterTransition,
 ) : LinearLayout(readerThemedContext), ViewPagerAdapter.PositionableView {
 
-    private val scope = CoroutineScope(Dispatchers.IO)
+    private val scope = MainScope()
     private var stateJob: Job? = null
 
     /**
@@ -81,7 +80,7 @@ class PagerTransitionHolder(
      */
     private fun observeStatus(chapter: ReaderChapter) {
         stateJob?.cancel()
-        stateJob = scope.launchUI {
+        stateJob = scope.launch {
             chapter.stateFlow
                 .collectLatest { state ->
                     pagesContainer.removeAllViews()

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonPageHolder.kt

@@ -18,13 +18,12 @@ import eu.kanade.tachiyomi.ui.reader.model.StencilPage
 import eu.kanade.tachiyomi.ui.reader.viewer.ReaderPageImageView
 import eu.kanade.tachiyomi.ui.reader.viewer.ReaderProgressIndicator
 import eu.kanade.tachiyomi.ui.webview.WebViewActivity
-import eu.kanade.tachiyomi.util.lang.launchUI
 import eu.kanade.tachiyomi.util.system.ImageUtil
 import eu.kanade.tachiyomi.util.system.dpToPx
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.launch
 import rx.Observable
 import rx.Subscription
 import rx.android.schedulers.AndroidSchedulers
@@ -71,7 +70,7 @@ class WebtoonPageHolder(
      */
     private var page: ReaderPage? = null
 
-    private val scope = CoroutineScope(Dispatchers.IO)
+    private val scope = MainScope()
 
     /**
      * Subscription for status changes of the page.
@@ -156,7 +155,7 @@ class WebtoonPageHolder(
 
         val page = page ?: return
 
-        progressJob = scope.launchUI {
+        progressJob = scope.launch {
             page.progressFlow.collectLatest { value -> progressIndicator.setProgress(value) }
         }
     }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonTransitionHolder.kt

@@ -13,12 +13,11 @@ import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.ui.reader.model.ChapterTransition
 import eu.kanade.tachiyomi.ui.reader.model.ReaderChapter
 import eu.kanade.tachiyomi.ui.reader.viewer.ReaderTransitionView
-import eu.kanade.tachiyomi.util.lang.launchUI
 import eu.kanade.tachiyomi.util.system.dpToPx
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.launch
 
 /**
  * Holder of the webtoon viewer that contains a chapter transition.
@@ -28,7 +27,7 @@ class WebtoonTransitionHolder(
     viewer: WebtoonViewer,
 ) : WebtoonBaseHolder(layout, viewer) {
 
-    private val scope = CoroutineScope(Dispatchers.IO)
+    private val scope = MainScope()
     private var stateJob: Job? = null
 
     private val transitionView = ReaderTransitionView(context)
@@ -82,7 +81,7 @@ class WebtoonTransitionHolder(
      */
     private fun observeStatus(chapter: ReaderChapter, transition: ChapterTransition) {
         stateJob?.cancel()
-        stateJob = scope.launchUI {
+        stateJob = scope.launch {
             chapter.stateFlow
                 .collectLatest { state ->
                     pagesContainer.removeAllViews()