@@ -452,6 +452,11 @@ impl BlockSnapshot {
pub fn clip_point(&self, point: BlockPoint, bias: Bias) -> BlockPoint {
let mut cursor = self.transforms.cursor::<(BlockPoint, WrapPoint)>();
cursor.seek(&point, Bias::Right, &());
+ if let Some(transform) = cursor.prev_item() {
+ if transform.is_isomorphic() && point == cursor.start().0 {
+ return point;
+ }
+ }
if let Some(transform) = cursor.item() {
if transform.is_isomorphic() {
let (output_start, input_start) = cursor.start();
@@ -771,6 +776,46 @@ mod tests {
snapshot.to_block_point(WrapPoint::new(1, 0)),
BlockPoint::new(3, 0)
);
+ assert_eq!(
+ snapshot.clip_point(BlockPoint::new(1, 0), Bias::Left),
+ BlockPoint::new(1, 0)
+ );
+ assert_eq!(
+ snapshot.clip_point(BlockPoint::new(1, 0), Bias::Right),
+ BlockPoint::new(1, 0)
+ );
+ assert_eq!(
+ snapshot.clip_point(BlockPoint::new(1, 1), Bias::Left),
+ BlockPoint::new(1, 0)
+ );
+ assert_eq!(
+ snapshot.clip_point(BlockPoint::new(1, 1), Bias::Right),
+ BlockPoint::new(3, 0)
+ );
+ assert_eq!(
+ snapshot.clip_point(BlockPoint::new(3, 0), Bias::Left),
+ BlockPoint::new(3, 0)
+ );
+ assert_eq!(
+ snapshot.clip_point(BlockPoint::new(3, 0), Bias::Right),
+ BlockPoint::new(3, 0)
+ );
+ assert_eq!(
+ snapshot.clip_point(BlockPoint::new(5, 3), Bias::Left),
+ BlockPoint::new(5, 3)
+ );
+ assert_eq!(
+ snapshot.clip_point(BlockPoint::new(5, 3), Bias::Right),
+ BlockPoint::new(5, 3)
+ );
+ assert_eq!(
+ snapshot.clip_point(BlockPoint::new(6, 0), Bias::Left),
+ BlockPoint::new(5, 3)
+ );
+ assert_eq!(
+ snapshot.clip_point(BlockPoint::new(6, 0), Bias::Right),
+ BlockPoint::new(5, 3)
+ );
// Insert a line break, separating two block decorations into separate
// lines.