terminal2: add Pin.cells

src/terminal2/PageList.zig

@@ -2038,6 +2038,21 @@ pub const Pin = struct {
         return .{ .row = rac.row, .cell = rac.cell };
     }
 
+    pub const CellSubset = enum { all, left, right };
+
+    /// Returns the cells for the row that this pin is on. The subset determines
+    /// what subset of the cells are returned. The "left/right" subsets are
+    /// inclusive of the x coordinate of the pin.
+    pub fn cells(self: Pin, subset: CellSubset) []pagepkg.Cell {
+        const rac = self.rowAndCell();
+        const all = self.page.data.getCells(rac.row);
+        return switch (subset) {
+            .all => all,
+            .left => all[0 .. self.x + 1],
+            .right => all[self.x..],
+        };
+    }
+
     /// Iterators. These are the same as PageList iterator funcs but operate
     /// on pins rather than points. This is MUCH more efficient than calling
     /// pointFromPin and building up the iterator from points.

src/terminal2/main.zig

@@ -28,6 +28,7 @@ pub const MouseShape = @import("mouse_shape.zig").MouseShape;
 pub const Page = page.Page;
 pub const PageList = @import("PageList.zig");
 pub const Parser = @import("Parser.zig");
+pub const Pin = PageList.Pin;
 pub const Screen = @import("Screen.zig");
 pub const Selection = @import("Selection.zig");
 pub const Terminal = @import("Terminal.zig");