view: introduce view_selections_normalize

Dispose all invalid and merge all overlapping selections.

2 files changed, 24 insertions, 0 deletions

diff --git a/view.c b/view.c
index 262bdde..1233b24 100644
--- a/view.c
+++ b/view.c
@@ -1250,6 +1250,28 @@ bool view_selections_restore(Selection *s) {
 	return true;
 }
 
+void view_selections_normalize(View *view) {
+	Selection *prev = NULL;
+	Filerange range_prev = text_range_empty();
+	for (Selection *s = view->selections, *next; s; s = next) {
+		next = s->next;
+		Filerange range = view_selections_get(s);
+		if (!text_range_valid(&range)) {
+			view_selections_dispose(s);
+		} else if (prev && text_range_overlap(&range_prev, &range)) {
+			range_prev = text_range_union(&range_prev, &range);
+			view_selections_dispose(s);
+		} else {
+			if (prev)
+				view_selections_set(prev, &range_prev);
+			range_prev = range;
+			prev = s;
+		}
+	}
+	if (prev)
+		view_selections_set(prev, &range_prev);
+}
+
 Text *view_text(View *view) {
 	return view->text;
 }
diff --git a/view.h b/view.h
index e5f4c7f..677824a 100644
--- a/view.h
+++ b/view.h
@@ -137,6 +137,8 @@ bool view_selections_dispose_force(Selection*);
 Selection *view_selection_disposed(View*);
 /** Dispose all but the primary selection. */
 void view_selections_dispose_all(View*);
+/** Dispose all invalid and merge all overlapping selections. */
+void view_selections_normalize(View*);
 /**
  * @}
  * @defgroup view_navigate