1 files changed, 19 insertions, 0 deletions
diff --git a/src/command/modify_master_factor.zig b/src/command/modify_master_factor.zig
new file mode 100644
index 0000000..c522485
--- /dev/null
+++ b/src/command/modify_master_factor.zig
@@ -0,0 +1,19 @@
+const c = @import("../c.zig");
+const std = @import("std");
+
+const Arg = @import("../command.zig").Arg;
+const Seat = @import("../seat.zig").Seat;
+
+/// Modify the percent of the width of the screen that the master views occupy.
+pub fn modifyMasterFactor(seat: *Seat, arg: Arg) void {
+    const delta = arg.float;
+    const output = seat.focused_output;
+    const new_master_factor = std.math.min(
+        std.math.max(output.master_factor + delta, 0.05),
+        0.95,
+    );
+    if (new_master_factor != output.master_factor) {
+        output.master_factor = new_master_factor;
+        seat.input_manager.server.root.arrange();
+    }
+}