54 lines
2.1 KiB
Zig
54 lines
2.1 KiB
Zig
// This file is part of river, a dynamic tiling wayland compositor.
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//
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// Copyright 2020 Isaac Freund
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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const std = @import("std");
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const Direction = @import("../command.zig").Direction;
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const Error = @import("../command.zig").Error;
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const Output = @import("../Output.zig");
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const Seat = @import("../Seat.zig");
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/// Focus either the next or the previous output, depending on the bool passed.
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/// Does nothing if there is only one output.
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pub fn focusOutput(
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allocator: *std.mem.Allocator,
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seat: *Seat,
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args: []const []const u8,
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out: *?[]const u8,
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) Error!void {
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if (args.len < 2) return Error.NotEnoughArguments;
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if (args.len > 2) return Error.TooManyArguments;
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const direction = std.meta.stringToEnum(Direction, args[1]) orelse return Error.InvalidDirection;
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const root = &seat.input_manager.server.root;
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// If the noop output is focused, there are no other outputs to switch to
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if (seat.focused_output == &root.noop_output) {
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std.debug.assert(root.outputs.len == 0);
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return;
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}
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// Focus the next/prev output in the list if there is one, else wrap
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const focused_node = @fieldParentPtr(std.TailQueue(Output).Node, "data", seat.focused_output);
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seat.focusOutput(switch (direction) {
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.next => if (focused_node.next) |node| &node.data else &root.outputs.first.?.data,
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.previous => if (focused_node.prev) |node| &node.data else &root.outputs.last.?.data,
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});
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seat.focus(null);
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}
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