[libadwaita/wip/exalm/tabs2] tab-box: Use final positions for reordering

[Alexander Mikhaylenko <alexm src gnome org>]

commit 58e3f8d5ab3e2e1d41dd3849d0b5bd6b4f89a698
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Tue Aug 2 11:57:33 2022 +0400

    tab-box: Use final positions for reordering
    
    Make this slightly less janky. There's still jank from how the tab width
    change is animated though, but a lot less at least - and actually none with
    with expand-tabs=false.

 src/adw-tab-box.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/adw-tab-box.c b/src/adw-tab-box.c
index 01e70354..ae11239c 100644
--- a/src/adw-tab-box.c
+++ b/src/adw-tab-box.c
@@ -1321,7 +1321,7 @@ update_drag_reodering (AdwTabBox *self)
 
   for (l = self->tabs; l; l = l->next) {
     TabInfo *info = l->data;
-    int center = info->unshifted_pos + info->width / 2;
+    int center = info->unshifted_pos + info->final_width / 2;
 
     if (info == self->reordered_tab)
       old_index = i;
@@ -3189,7 +3189,7 @@ adw_tab_box_size_allocate (GtkWidget *widget,
   for (l = self->tabs; l; l = l->next) {
     TabInfo *info = l->data;
 
-    info->unshifted_pos = pos;
+    info->unshifted_pos = final_pos;
     info->pos = pos + calculate_tab_offset (self, info, FALSE);
     info->final_pos = final_pos + calculate_tab_offset (self, info, TRUE);