Resolve #865

app/src/main/java/com/hippo/ehviewer/gallery/ArchivePageLoader.kt

@@ -117,6 +117,9 @@ class ArchivePageLoader(context: Context, uri: Uri, passwdFlow: Flow<String>) :
         return size != 0
     }
 
+    override val isReady: Boolean
+        get() = size != 0
+
     override fun onCancelRequest(index: Int) {
         mJobMap[index]?.cancel()
     }

app/src/main/java/com/hippo/ehviewer/gallery/EhPageLoader.kt

@@ -100,6 +100,9 @@ class EhPageLoader(private val mGalleryInfo: GalleryInfo) : PageLoader2(), OnSpi
         return mSpiderQueen.awaitReady()
     }
 
+    override val isReady: Boolean
+        get() = mSpiderQueen.isReady
+
     override fun onCancelRequest(index: Int) {
         mSpiderQueen.cancelRequest(index)
     }

app/src/main/java/com/hippo/ehviewer/spider/SpiderQueen.kt

@@ -166,7 +166,7 @@ class SpiderQueen private constructor(val galleryInfo: GalleryInfo) : CoroutineS
     }
 
     private var downloadMode = false
-    private val isReady
+    val isReady
         get() = this::mSpiderInfo.isInitialized && this::mPageStateArray.isInitialized
 
     @Synchronized

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt

@@ -320,6 +320,7 @@ class ReaderActivity : EhActivity() {
     }
 
     fun setGallery() {
+        if (mGalleryProvider?.isReady != true) return
         // TODO: Not well place to call it
         dialog.dismiss()
 

app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/PageLoader.kt

@@ -19,6 +19,7 @@ abstract class PageLoader {
     private val mPreloads = MathUtils.clamp(com.hippo.ehviewer.Settings.getPreloadImage(), 0, 100)
 
     abstract suspend fun awaitReady(): Boolean
+    abstract val isReady: Boolean
 
     abstract fun start()