river: get rid of all server-created options

- Replace the layout option with new default-layout and output-layout
commands.
- Remove the ability to get/set the output title entirely.

river/command/layout.zig

@@ -0,0 +1,54 @@
+// This file is part of river, a dynamic tiling wayland compositor.
+//
+// Copyright 2021 The River Developers
+//
+// 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 util = @import("../util.zig");
+
+const Error = @import("../command.zig").Error;
+const Seat = @import("../Seat.zig");
+
+pub fn outputLayout(
+    allocator: *std.mem.Allocator,
+    seat: *Seat,
+    args: []const []const u8,
+    out: *?[]const u8,
+) Error!void {
+    if (args.len < 2) return Error.NotEnoughArguments;
+    if (args.len > 2) return Error.TooManyArguments;
+
+    const output = seat.focused_output;
+    output.layout_namespace = try util.gpa.dupe(u8, args[1]);
+    output.handleLayoutNamespaceChange();
+}
+
+pub fn defaultLayout(
+    allocator: *std.mem.Allocator,
+    seat: *Seat,
+    args: []const []const u8,
+    out: *?[]const u8,
+) Error!void {
+    if (args.len < 2) return Error.NotEnoughArguments;
+    if (args.len > 2) return Error.TooManyArguments;
+
+    const server = seat.input_manager.server;
+    server.config.default_layout_namespace = try util.gpa.dupe(u8, args[1]);
+    var it = server.root.all_outputs.first;
+    while (it) |node| : (it = node.next) {
+        const output = node.data;
+        if (output.layout_namespace == null) output.handleLayoutNamespaceChange();
+    }
+}