Fix album part edit/delete/replace after reorder.

Telegram/SourceFiles/boxes/send_files_box.cpp

@@ -760,6 +760,8 @@ void SendFilesBox::pushBlock(int from, int till) {
 	) | rpl::filter([=] {
 		return !_removingIndex;
 	}) | rpl::start_with_next([=](int index) {
+		applyBlockChanges();
+
 		_removingIndex = index;
 		crl::on_main(this, [=] {
 			const auto index = base::take(_removingIndex).value_or(-1);
@@ -780,6 +782,8 @@ void SendFilesBox::pushBlock(int from, int till) {
 	const auto show = uiShow();
 	block.itemReplaceRequest(
 	) | rpl::start_with_next([=](int index) {
+		applyBlockChanges();
+
 		const auto replace = [=](Ui::PreparedList list) {
 			if (list.files.empty()) {
 				return;
@@ -855,6 +859,8 @@ void SendFilesBox::pushBlock(int from, int till) {
 	const auto openedOnce = widget->lifetime().make_state<bool>(false);
 	block.itemModifyRequest(
 	) | rpl::start_with_next([=, show = _show](int index) {
+		applyBlockChanges();
+
 		if (!(*openedOnce)) {
 			show->session().settings().incrementPhotoEditorHintShown();
 			show->session().saveSettings();

Telegram/SourceFiles/ui/chat/attach/attach_album_preview.cpp

@@ -142,8 +142,8 @@ void AlbumPreview::prepareThumbs(gsl::span<Ui::PreparedFile> items) {
 			layout[i],
 			this,
 			[=] { update(); },
-			[=] { changeThumbByIndex(thumbIndex(thumbUnderCursor())); },
-			[=] { deleteThumbByIndex(thumbIndex(thumbUnderCursor())); }));
+			[=] { changeThumbByIndex(orderIndex(thumbUnderCursor())); },
+			[=] { deleteThumbByIndex(orderIndex(thumbUnderCursor())); }));
 		if (_thumbs.back()->isCompressedSticker()) {
 			_hasMixedFileHeights = true;
 		}
@@ -218,8 +218,7 @@ not_null<AlbumThumbnail*> AlbumPreview::findClosestThumb(
 	return result;
 }
 
-int AlbumPreview::orderIndex(
-	not_null<AlbumThumbnail*> thumb) const {
+int AlbumPreview::orderIndex(not_null<AlbumThumbnail*> thumb) const {
 	const auto i = ranges::find_if(_order, [&](int index) {
 		return (_thumbs[index].get() == thumb);
 	});
@@ -400,17 +399,6 @@ void AlbumPreview::paintFiles(Painter &p, QRect clip) const {
 	}
 }
 
-int AlbumPreview::thumbIndex(AlbumThumbnail *thumb) {
-	if (!thumb) {
-		return -1;
-	}
-	const auto thumbIt = ranges::find_if(_thumbs, [&](auto &t) {
-		return t.get() == thumb;
-	});
-	Expects(thumbIt != _thumbs.end());
-	return std::distance(_thumbs.begin(), thumbIt);
-}
-
 AlbumThumbnail *AlbumPreview::thumbUnderCursor() {
 	return findThumb(mapFromGlobal(QCursor::pos()));
 }
@@ -439,7 +427,7 @@ void AlbumPreview::modifyThumbByIndex(int index) {
 void AlbumPreview::thumbButtonsCallback(
 		not_null<AlbumThumbnail*> thumb,
 		AttachButtonType type) {
-	const auto index = thumbIndex(thumb);
+	const auto index = orderIndex(thumb);
 
 	switch (type) {
 	case AttachButtonType::None: return;

Telegram/SourceFiles/ui/chat/attach/attach_album_preview.h

@@ -64,7 +64,6 @@ private:
 	void updateSize();
 	void updateFileRows();
 
-	int thumbIndex(AlbumThumbnail *thumb);
 	AlbumThumbnail *thumbUnderCursor();
 	void deleteThumbByIndex(int index);
 	void changeThumbByIndex(int index);