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-rw-r--r--shell/ev-sidebar-thumbnails.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/shell/ev-sidebar-thumbnails.c b/shell/ev-sidebar-thumbnails.c
index 22054251..20243e5b 100644
--- a/shell/ev-sidebar-thumbnails.c
+++ b/shell/ev-sidebar-thumbnails.c
@@ -476,6 +476,14 @@ update_visible_range (EvSidebarThumbnails *sidebar_thumbnails,
{
EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
int old_start_page, old_end_page;
+ int n_pages_in_visible_range;
+
+ /* Preload before and after current visible scrolling range, the same amount of
+ * thumbs in it, to help prevent thumbnail creation happening in the user's sight.
+ * https://bugzilla.gnome.org/show_bug.cgi?id=342110#c15 */
+ n_pages_in_visible_range = (end_page - start_page) + 1;
+ start_page = MAX (0, start_page - n_pages_in_visible_range);
+ end_page = MIN (priv->n_pages - 1, end_page + n_pages_in_visible_range);
old_start_page = priv->start_page;
old_end_page = priv->end_page;