Actually detect an empty filelist

This fixes imlib2 warnings (and occasional X errors/segfaults), which used to
occur when all files in feh's filelist were suddenly deleted by an external
application. Now, feh simply quits with "No more slides in show" (which makes
more sense, IMHO).

1 files changed, 7 insertions, 16 deletions

diff --git a/src/slideshow.c b/src/slideshow.c
index 1a3ffe8..314374c 100644
--- a/src/slideshow.c
+++ b/src/slideshow.c
@@ -50,7 +50,6 @@ void init_slideshow_mode(void)
 		file = FEH_FILE(l->data);
 		if (last) {
 			filelist = feh_file_remove_from_list(filelist, last);
-			filelist_len--;
 			last = NULL;
 		}
 		current_file = l;
@@ -128,6 +127,7 @@ void feh_reload_image(winwidget w, int resize, int force_new)
 		winwidget_rename(w, title);
 		free(title);
 		free(new_title);
+		filelist = feh_file_remove_from_list(filelist, w->file);
 		D_RETURN_(4);
 	}
 	if (force_new) {
@@ -244,7 +244,6 @@ void slideshow_change_image(winwidget winwid, int change)
 
 		if (last) {
 			filelist = feh_file_remove_from_list(filelist, last);
-			filelist_len--;
 			last = NULL;
 		}
 		s = slideshow_create_name(FEH_FILE(current_file->data));
@@ -268,18 +267,12 @@ void slideshow_change_image(winwidget winwid, int change)
 		} else
 			last = current_file;
 	}
-	if (!success) {
-		/* We get here if three files in a row could not be loaded.
-		 * However, it seems that this piece of code is never reached when feh
-		 * would otherwise fail; it's only executed in the aforementioned case,
-		 * causing slideshows to exit although there still are lots of working slides.
-		 *
-		 * So far, there is one known case were we should exit here:
-		 * When viewing a set of files, externally removing all of them and then resizing
-		 * the window in feh, feh will print lots of imlib errors and eventually segfault.
-		 */
-		weprintf("No more slides in show?");
-	}
+	if (last)
+		filelist = feh_file_remove_from_list(filelist, last);
+
+	if (filelist_len == 0)
+		eprintf("No more slides in show");
+
 	if (opt.slideshow_delay >= 0.0)
 		feh_add_timer(cb_slide_timer, winwid, opt.slideshow_delay, "SLIDE_CHANGE");
 	D_RETURN_(4);
@@ -445,7 +438,6 @@ void feh_filelist_image_remove(winwidget winwid, char do_delete)
 
 		doomed = current_file;
 		slideshow_change_image(winwid, SLIDE_NEXT);
-		filelist_len--;
 		if (do_delete)
 			filelist = feh_file_rm_and_free(filelist, doomed);
 		else
@@ -460,7 +452,6 @@ void feh_filelist_image_remove(winwidget winwid, char do_delete)
 		free(s);
 	} else if ((winwid->type == WIN_TYPE_SINGLE)
 		   || (winwid->type == WIN_TYPE_THUMBNAIL_VIEWER)) {
-		filelist_len--;
 		if (do_delete)
 			filelist = feh_file_rm_and_free(filelist, winwid->file);
 		else