Implement declare_mode

1 files changed, 51 insertions, 0 deletions

diff --git a/src/command/declare_mode.zig b/src/command/declare_mode.zig
new file mode 100644
index 0000000..6cc1489
--- /dev/null
+++ b/src/command/declare_mode.zig
@@ -0,0 +1,51 @@
+// 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 c = @import("../c.zig");
+
+const Error = @import("../command.zig").Error;
+const Keybind = @import("../Keybind.zig");
+const Seat = @import("../Seat.zig");
+
+/// Declare a new keybind mode
+pub fn declareMode(
+    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 new_mode_name = args[1];
+
+    if (config.mode_to_id.get(new_mode_name) != null) {
+        failure_message.* = try std.fmt.allocPrint(
+            allocator,
+            "mode '{}' already exists and cannot be re-declared",
+            .{new_mode_name},
+        );
+        return Error.CommandFailed;
+    }
+
+    try config.mode_to_id.putNoClobber(new_mode_name, config.modes.items.len);
+    errdefer _ = config.mode_to_id.remove(new_mode_name);
+    try config.modes.append(std.ArrayList(Keybind).init(allocator));
+}