Preheat SpiderQueen in GalleryDetailScene, Resolve #818

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

@@ -239,6 +239,11 @@ class SpiderQueen private constructor(val galleryInfo: GalleryInfo) : CoroutineS
         notifyGetPages(mSpiderInfo.pages)
     }
 
+    suspend fun awaitStartPage(): Int {
+        prepareJob.join()
+        return mSpiderInfo.startPage
+    }
+
     private fun stop() {
         launchNonCancellable { writeSpiderInfoToLocal() }
         cancel()
@@ -516,22 +521,6 @@ class SpiderQueen private constructor(val galleryInfo: GalleryInfo) : CoroutineS
                 sQueenMap.remove(queen.galleryInfo.gid)
             }
         }
-
-        fun getStartPage(gid: Long): Int {
-            val queen = sQueenMap[gid]
-            var spiderInfo: SpiderInfo? = null
-
-            // Fast Path: read existing queen
-            if (queen != null) {
-                spiderInfo = queen.mSpiderInfo
-            }
-
-            // Slow path, read diskcache
-            if (spiderInfo == null) {
-                spiderInfo = readFromCache(gid)
-            }
-            return spiderInfo?.startPage ?: 0
-        }
     }
 
     override val coroutineContext: CoroutineContext

app/src/main/java/com/hippo/ehviewer/ui/scene/GalleryDetailScene.kt

@@ -264,7 +264,7 @@ class GalleryDetailScene : CollapsingToolbarScene(), View.OnClickListener, Downl
         mGalleryInfo?.let {
             viewLifecycleOwner.lifecycleScope.launchIO {
                 runCatching {
-                    val startPage = SpiderQueen.getStartPage(it.gid)
+                    val startPage = spiderQueen?.awaitStartPage() ?: 0
                     withUIContext {
                         binding.content.header.read.text = if (startPage == 0) {
                             getString(R.string.read)
@@ -354,6 +354,8 @@ class GalleryDetailScene : CollapsingToolbarScene(), View.OnClickListener, Downl
         return true
     }
 
+    private var spiderQueen: SpiderQueen? = null
+
     override fun onCreateViewWithToolbar(
         inflater: LayoutInflater, container: ViewGroup?,
         savedInstanceState: Bundle?
@@ -421,11 +423,14 @@ class GalleryDetailScene : CollapsingToolbarScene(), View.OnClickListener, Downl
         }
         downloadManager.addDownloadInfoListener(this)
         (requireActivity() as MainActivity).mShareUrl = galleryDetailUrl
+        spiderQueen = SpiderQueen.obtainSpiderQueen(galleryInfo!!, SpiderQueen.MODE_READ)
         return binding.root
     }
 
     override fun onDestroyView() {
         super.onDestroyView()
+        spiderQueen?.let { SpiderQueen.releaseSpiderQueen(it, SpiderQueen.MODE_READ)  }
+        spiderQueen = null
         val context = context
         AssertUtils.assertNotNull(context)
         downloadManager.removeDownloadInfoListener(this)