Changed lineStates to a SplitVector so that it supports insert and delete

so inserting and deleting lines does not cause a really large number of
changed values under most circumstances leading to fewer notifications.
SVector is no longer used.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/SplitVector.h b/src/SplitVector.h
index 342be02ad..9d62aef72 100644
--- a/src/SplitVector.h
+++ b/src/SplitVector.h
@@ -181,6 +181,14 @@ public:
 			gapLength -= insertLength;
 		}
 	}
+
+	/// Ensure at least length elements allocated, 
+	/// appending zero valued elements if needed.
+	void EnsureLength(int wantedLength) {
+		if (Length() < wantedLength) {
+			InsertValue(Length(), wantedLength - Length(), 0);
+		}
+	}
 	
 	/// Insert text into the buffer from an array.
 	void InsertFromArray(int positionToInsert, const T s[], int positionFrom, int insertLength) {