From f0715f16e0e49df0161302c79a33fc46d5b546ca Mon Sep 17 00:00:00 2001
From: andrew <andrewgallasch@gmail.com>
Date: Mon, 8 May 2023 14:07:36 +0930
Subject: [PATCH] Fix scroll to bottom button always visible if last item is
 taller than RecyclerView

---
 .../securesms/conversation/v2/ConversationActivityV2.kt  | 5 +----
 .../java/org/session/libsession/utilities/ViewUtils.kt   | 9 ++++++++-
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationActivityV2.kt b/app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationActivityV2.kt
index cabb58308..107627b2c 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationActivityV2.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationActivityV2.kt
@@ -212,10 +212,7 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
     var searchViewItem: MenuItem? = null
 
     private val isScrolledToBottom: Boolean
-        get() {
-            val position = layoutManager?.findFirstCompletelyVisibleItemPosition() ?: 0
-            return position == 0
-        }
+        get() = binding?.conversationRecyclerView?.isScrolledToBottom ?: true
 
     private val layoutManager: LinearLayoutManager?
         get() { return binding?.conversationRecyclerView?.layoutManager as LinearLayoutManager? }
diff --git a/libsession/src/main/java/org/session/libsession/utilities/ViewUtils.kt b/libsession/src/main/java/org/session/libsession/utilities/ViewUtils.kt
index 5781ea3e2..f67abe8ec 100644
--- a/libsession/src/main/java/org/session/libsession/utilities/ViewUtils.kt
+++ b/libsession/src/main/java/org/session/libsession/utilities/ViewUtils.kt
@@ -4,6 +4,7 @@ import android.content.Context
 import android.util.TypedValue
 import androidx.annotation.AttrRes
 import androidx.annotation.ColorInt
+import androidx.recyclerview.widget.RecyclerView
 
 @ColorInt
 fun Context.getColorFromAttr(
@@ -13,4 +14,10 @@ fun Context.getColorFromAttr(
 ): Int {
     theme.resolveAttribute(attrColor, typedValue, resolveRefs)
     return typedValue.data
-}
\ No newline at end of file
+}
+
+val RecyclerView.isScrolledToBottom: Boolean
+    get() {
+        val contentHeight = height - (paddingTop + paddingBottom)
+        return computeVerticalScrollRange() == computeVerticalScrollOffset() + contentHeight
+    }