1 files changed, 57 insertions, 0 deletions
diff --git a/helix-core/src/position.rs b/helix-core/src/position.rs
new file mode 100644
index 00000000..8bc48094
--- /dev/null
+++ b/helix-core/src/position.rs
@@ -0,0 +1,57 @@
+/// Represents a single point in a text buffer. Zero indexed.
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Position {
+    pub row: usize,
+    pub col: usize,
+}
+
+impl Position {
+    pub const fn new(row: usize, col: usize) -> Self {
+        Self { row, col }
+    }
+
+    pub const fn is_zero(self) -> bool {
+        self.row == 0 && self.col == 0
+    }
+
+    // TODO: generalize
+    pub fn traverse(self, text: &crate::Tendril) -> Self {
+        let Self { mut row, mut col } = self;
+        // TODO: there should be a better way here
+        for ch in text.chars() {
+            if ch == '\n' {
+                row += 1;
+                col = 0;
+            } else {
+                col += 1;
+            }
+        }
+        Self { row, col }
+    }
+}
+
+impl From<(usize, usize)> for Position {
+    fn from(tuple: (usize, usize)) -> Self {
+        Position {
+            row: tuple.0,
+            col: tuple.1,
+        }
+    }
+}
+
+impl Into<tree_sitter::Point> for Position {
+    fn into(self) -> tree_sitter::Point {
+        tree_sitter::Point::new(self.row, self.col)
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_ordering() {
+        // (0, 5) is less than (1, 0)
+        assert!(Position::new(0, 5) < Position::new(1, 0));
+    }
+}