river: add keyboard groups

river/command/keyboard_group.zig

@@ -0,0 +1,90 @@
+// This file is part of river, a dynamic tiling wayland compositor.
+//
+// Copyright 2022 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, version 3.
+//
+// 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 mem = std.mem;
+
+const server = &@import("../main.zig").server;
+const util = @import("../util.zig");
+
+const Error = @import("../command.zig").Error;
+const Seat = @import("../Seat.zig");
+const KeyboardGroup = @import("../KeyboardGroup.zig");
+
+pub fn keyboardGroupCreate(
+    seat: *Seat,
+    args: []const [:0]const u8,
+    out: *?[]const u8,
+) Error!void {
+    if (args.len < 2) return Error.NotEnoughArguments;
+    if (args.len > 2) return Error.TooManyArguments;
+
+    var it = seat.keyboard_groups.first;
+    while (it) |node| : (it = node.next) {
+        if (mem.eql(u8, node.data.name, args[1])) {
+            const msg = try util.gpa.dupe(u8, "error: failed to create keybaord group: group of same name already exists\n");
+            out.* = msg;
+            return;
+        }
+    }
+
+    const node = try util.gpa.create(std.TailQueue(KeyboardGroup).Node);
+    errdefer util.gpa.destroy(node);
+    try node.data.init(seat, args[1]);
+    seat.keyboard_groups.append(node);
+}
+
+pub fn keyboardGroupDestroy(
+    seat: *Seat,
+    args: []const [:0]const u8,
+    out: *?[]const u8,
+) Error!void {
+    if (args.len < 2) return Error.NotEnoughArguments;
+    if (args.len > 2) return Error.TooManyArguments;
+    const kg = keyboardGroupFromName(seat, args[1]) orelse {
+        const msg = try util.gpa.dupe(u8, "error: no keyboard group with that name exists\n");
+        out.* = msg;
+        return;
+    };
+    kg.deinit();
+    const node = @fieldParentPtr(std.TailQueue(KeyboardGroup).Node, "data", kg);
+    seat.keyboard_groups.remove(node);
+    util.gpa.destroy(node);
+}
+
+pub fn keyboardGroupAddIdentifier(
+    seat: *Seat,
+    args: []const [:0]const u8,
+    out: *?[]const u8,
+) Error!void {
+    if (args.len < 3) return Error.NotEnoughArguments;
+    if (args.len > 3) return Error.TooManyArguments;
+
+    const kg = keyboardGroupFromName(seat, args[1]) orelse {
+        const msg = try util.gpa.dupe(u8, "error: no keyboard group with that name exists\n");
+        out.* = msg;
+        return;
+    };
+    try kg.addKeyboardIdentifier(args[2]);
+}
+
+fn keyboardGroupFromName(seat: *Seat, name: []const u8) ?*KeyboardGroup {
+    var it = seat.keyboard_groups.first;
+    while (it) |node| : (it = node.next) {
+        if (mem.eql(u8, node.data.name, name)) return &node.data;
+    }
+    return null;
+}