Overview filling fix when you scroll the history down till the bottom.

Telegram/SourceFiles/history.cpp

@@ -1345,7 +1345,30 @@ void History::addNewerSlice(const QVector<MTPMessage> &slice) {
 		}
 	}
 
-	if (!wasLoadedAtBottom && loadedAtBottom()) { // add all loaded photos to overview
+	if (!wasLoadedAtBottom) {
+		checkAddAllToOverview();
+	}
+
+	if (isChannel()) asChannelHistory()->checkJoinedMessage();
+	checkLastMsg();
+}
+
+void History::checkLastMsg() {
+	if (lastMsg) {
+		if (!newLoaded && !lastMsg->detached()) {
+			newLoaded = true;
+			checkAddAllToOverview();
+		}
+	} else if (newLoaded) {
+		setLastMessage(lastImportantMessage());
+	}
+}
+
+void History::checkAddAllToOverview() {
+	if (!loadedAtBottom()) {
+		return;
+	}
+
 	int32 mask = 0;
 	for (int32 i = 0; i < OverviewCount; ++i) {
 		if (overviewCountData[i] == 0) continue; // all loaded
@@ -1365,20 +1388,6 @@ void History::addNewerSlice(const QVector<MTPMessage> &slice) {
 	}
 }
 
-	if (isChannel()) asChannelHistory()->checkJoinedMessage();
-	checkLastMsg();
-}
-
-void History::checkLastMsg() {
-	if (lastMsg) {
-		if (!newLoaded && !lastMsg->detached()) {
-			newLoaded = true;
-		}
-	} else if (newLoaded) {
-		setLastMessage(lastImportantMessage());
-	}
-}
-
 int History::countUnread(MsgId upTo) {
 	int result = 0;
 	for (auto i = blocks.cend(), e = blocks.cbegin(); i != e;) {

Telegram/SourceFiles/history.h

@@ -494,6 +494,9 @@ private:
 	// After adding a new history slice check the lastMsg and newLoaded.
 	void checkLastMsg();
 
+	// Add all items to the media overview if we were not loaded at bottom and now are.
+	void checkAddAllToOverview();
+
 	enum class Flag {
 		f_has_pending_resized_items = (1 << 0),
 		f_pending_resize            = (1 << 1),