cancelling previous page jobs when switch gallery pages

features/messenger/src/main/kotlin/app/dapk/st/messenger/gallery/PageReducer.kt

@@ -38,3 +38,8 @@ sealed interface PageAction : Action {
 data class PageContainer<P>(
     val page: SpiderPage<out P>
 )
+
+fun PageContainer<*>.isDifferentPage(page: SpiderPage<*>): Boolean {
+    return page::class != this.page::class
+}
+

features/messenger/src/main/kotlin/app/dapk/st/messenger/gallery/state/ImageGalleryReducer.kt

@@ -56,4 +56,10 @@ private fun SharedStateScope<Combined2<PageContainer<ImageGalleryPage>, Unit>>.c
             dispatch(PageAction.UpdatePage(page.state.copy(content = Lce.Content(media))))
         })
     },
+
+    sideEffect(PageAction.GoTo::class) { action, _ ->
+        if (getSharedState().state1.isDifferentPage(action.page)) {
+            jobBag.cancel("page")
+        }
+    }
 )