1 files changed, 43 insertions, 0 deletions
diff --git a/src/command/enter_mode.zig b/src/command/enter_mode.zig
new file mode 100644
index 0000000..8c7e3e4
--- /dev/null
+++ b/src/command/enter_mode.zig
@@ -0,0 +1,43 @@
+// This file is part of river, a dynamic tiling wayland compositor.
+//
+// Copyright 2020 Isaac Freund
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+const std = @import("std");
+
+const Error = @import("../command.zig").Error;
+const Seat = @import("../Seat.zig");
+
+/// Switch to the given mode
+pub fn enterMode(
+    allocator: *std.mem.Allocator,
+    seat: *Seat,
+    args: []const []const u8,
+    failure_message: *[]const u8,
+) Error!void {
+    if (args.len < 2) return Error.NotEnoughArguments;
+    if (args.len > 2) return Error.TooManyArguments;
+
+    const config = seat.input_manager.server.config;
+    const target_mode = args[1];
+    seat.mode_id = config.mode_to_id.getValue(target_mode) orelse {
+        failure_message.* = try std.fmt.allocPrint(
+            allocator,
+            "cannot enter non-existant mode '{}'",
+            .{target_mode},
+        );
+        return Error.CommandFailed;
+    };
+}