Expand transaction API.

1 files changed, 17 insertions, 0 deletions

diff --git a/helix-core/src/selection.rs b/helix-core/src/selection.rs
index 1c0b6b74..a196417a 100644
--- a/helix-core/src/selection.rs
+++ b/helix-core/src/selection.rs
@@ -113,6 +113,11 @@ impl Selection {
         self.ranges[self.primary_index]
     }
 
+    #[must_use]
+    pub fn cursor(&self) -> usize {
+        self.primary().head
+    }
+
     /// Ensure selection containing only the primary selection.
     pub fn into_single(self) -> Self {
         if self.ranges.len() == 1 {
@@ -144,6 +149,10 @@ impl Selection {
         )
     }
 
+    pub fn ranges(&self) -> &[Range] {
+        &self.ranges
+    }
+
     #[must_use]
     /// Constructs a selection holding a single range.
     pub fn single(anchor: usize, head: usize) -> Self {
@@ -200,6 +209,14 @@ impl Selection {
         // TODO: only normalize if needed (any ranges out of order)
         normalize(ranges, primary_index)
     }
+
+    /// Takes a closure and maps each selection over the closure.
+    pub fn transform<F>(self, f: F) -> Self
+    where
+        F: Fn(Range) -> Range,
+    {
+        Self::new(self.ranges.into_iter().map(f).collect(), self.primary_index)
+    }
 }
 
 // TODO: checkSelection -> check if valid for doc length